WO2018094644A1 - Downlink channel scrambling and descrambling method and apparatus, and base station and user equipment - Google Patents

Downlink channel scrambling and descrambling method and apparatus, and base station and user equipment Download PDF

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Publication number
WO2018094644A1
WO2018094644A1 PCT/CN2016/107088 CN2016107088W WO2018094644A1 WO 2018094644 A1 WO2018094644 A1 WO 2018094644A1 CN 2016107088 W CN2016107088 W CN 2016107088W WO 2018094644 A1 WO2018094644 A1 WO 2018094644A1
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Prior art keywords
data
user equipment
tti bundling
scrambling
code sequence
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PCT/CN2016/107088
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French (fr)
Chinese (zh)
Inventor
李振宇
韩金侠
李汉涛
马莎
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华为技术有限公司
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Priority to PCT/CN2016/107088 priority Critical patent/WO2018094644A1/en
Publication of WO2018094644A1 publication Critical patent/WO2018094644A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the present application relates to the field of communications, and in particular, to a method, an apparatus, a base station, and a user equipment for downlink channel scrambling and descrambling.
  • the coverage enhancement technology in LTE is divided into uplink coverage enhancement technology and downlink coverage enhancement technology.
  • the uplink coverage enhancement technology mainly includes the transmission time interval binding (TTIBundling) and the power enhancement (Power Boosting).
  • the downlink coverage enhancement technology mainly includes increasing the output power and increasing the number of transmitting antennas.
  • the standard of Enhanced Machine-Type Communication is introduced.
  • the eMTC does not support the physical downlink control channel (English: Physical Downlink Control Channel, PDCCH for short), and the control channel uses the MTC physical downlink control channel (English: MTC Physical Downlink Control Channel, MPDCCH for short).
  • the eMTC pairs the MPDCCH and the physical downlink shared channel (English: Physical Downlink Shared Channel, PDSCH for short)
  • the scrambling initialization sequence values are all modified accordingly, that is, within N acc subframe periods (N acc : the number of consecutive absolute subframes in which the scrambling sequence remains unchanged), the scrambling sequence remains unchanged, and
  • the scrambling sequence of the first sub-frame in the cycle is the same.
  • the present application provides a downlink channel scrambling and descrambling method, a device, a base station, and a user equipment, which can be compatible with legacy user equipments while implementing coverage enhancement for some users, thereby improving network deployment flexibility.
  • a first aspect of the embodiments of the present invention provides a downlink channel scrambling method, where the method includes:
  • the base station determines whether the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both in the cell, and the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement on the downlink data.
  • the user equipment is a user equipment that transmits downlink data without using TTiBundling for coverage enhancement; if both the TTI Bundling user equipment and the legacy state user equipment exist, the base station sends data and pairs to the user equipment sent to the TTI Bundling state to the Legacy.
  • the data of the user equipment of the state is scrambled separately using the scrambling code sequences generated by the initial values of the different scrambling code sequences.
  • the processing method of the initial value of the scrambling code sequence used by the data of the user equipment sent to the legacy state remains unchanged from 3GPP TS 36.211.
  • the user is differentiated on the network side, and is divided into a user equipment that does not need to perform the coverage enhanced Legacy state and a user equipment that needs to perform the coverage enhancement TTI Bundling state, and the two user equipments are different.
  • the initial values of the scrambling sequence are scrambled separately. Therefore, the network system using this technology can be compatible with legacy user equipment and TTI Bundling user equipment at the same time, and has better flexibility in actual deployment.
  • the base station when the base station sends data to the user equipment in the TTI Bundling state, the data packet is repeatedly sent multiple times, and when the data packet is repeatedly sent, each time the data packet is repeatedly sent.
  • the initial value of the scrambling code sequence used is the same, ie for sending to TTI
  • the first data repeatedly transmitted in the data of the user equipment in the Bundling state is the same as the initial value of the scrambling code sequence used to transmit the first data each time.
  • the initial value of the scrambling code sequence is used to generate a scrambling code sequence, and the initial value of the scrambling code sequence used for transmitting the first data is the same each time, indicating that the scrambling code sequence used is the same, indicating that the first data is repeatedly used.
  • the scrambling sequence is independent of the time parameter.
  • the initial value of the scrambling code sequence used for transmitting the first data for the first time is sent to the current channel for the first time.
  • the slot number in which the first data is located is related, and the initial value of the scrambling code sequence used for repeatedly transmitting the first data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time.
  • the initial value of the scrambling code sequence used for transmitting the first data for the first time may be the same as the initial value of the scrambling code sequence used by the data of the user equipment sent to the Legacy state in this time slot, and the first repeated transmission is performed.
  • the initial value of the scrambling code sequence used in the data is different from the initial value of the scrambling code sequence used by the data of the user equipment corresponding to the time slot transmitted to the legacy state.
  • the initial use of the scrambling code sequence for transmitting the first data for the first time Value can be c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current PDCCH channel.
  • the initial use of the scrambling code sequence for transmitting the first data for the first time Value can be Where c init is the initial value of the scrambling code sequence, and n s is the slot number in which the first EDR channel first transmits the first data.
  • c init is the initial value of the scrambling code sequence
  • n s is the slot number in which the first EDR channel first transmits the first data.
  • the value ranges from 0 to 503.
  • the initial use of the scrambling code sequence for transmitting the first data for the first time Value can be
  • c init is the initial value of the scrambling code sequence
  • q is the codeword sequence number
  • n RNTI is the user equipment identifier
  • n s is the time slot number where the first PDCCH channel first transmits the first data.
  • the initial value of the scrambling code sequence used when transmitting the first data for the first time and the subsequent repeated transmission of the first data is independent of time parameters such as the slot number:
  • the initial value of the scrambling code sequence used for transmitting the first data for the first time is The initial value of the scrambling code sequence determined according to the scrambling parameter, the scrambling parameter does not include the slot number in which the first channel is sent by the current channel, the initial value of the scrambling code sequence used to repeatedly transmit the first data, and the first data sent first.
  • the initial value of the scrambling code sequence used is the same.
  • the initial value of the scrambling code sequence used for transmitting the first data that is, the first data is sent for the first time and the first data is subsequently transmitted
  • the interference used by the user equipment sent to the Legacy state in the corresponding time slot is different.
  • the scrambling code sequence used for the first data is sent.
  • the initial value is based on the formula The initial value of the calculated scrambling sequence, where For the cell ID of the cell, c init is the initial value of the scrambling code sequence used to transmit the first data.
  • the scrambling code sequence used for transmitting the first data for the first time is based on the formula The initial value of the calculated scrambling sequence, where The scrambling initialization parameter is initialized with the EPDCCH scrambling, and the value ranges from 0 to 503.
  • the scrambling code sequence used for transmitting the first data for the first time is based on the formula The initial value of the calculated scrambling sequence, where For the cell ID of the cell, the n RNTI is the user equipment identifier in the TTI Bundling state, q is the codeword sequence number, and c init is the initial value of the scrambling code sequence used to transmit the first data.
  • the determining, by the base station, whether the TTI Bundling state user equipment and the traditional Legacy state user equipment are: The base station receives the capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports the downlink TTI Bundling; the base station receives the channel quality measurement value sent by the user equipment, and if the channel quality measurement value is lower than the channel quality preset value, the base station indicates the user When the device enters the TTI Bundling state, the base station determines that the user equipment in the TTI Bundling state and the user equipment in the legacy Legacy state exist in the cell.
  • All user equipments in the cell report a message to the base station indicating whether there is a downlink TTI.
  • the Bundling capability indicates that the user equipment enters the TTI Bundling state according to the current channel quality, so that the user equipment in the TTI Bundling state and the user equipment in the Legacy state exist in the cell, so that the two users can be separately scrambled and compatible.
  • the base station sends the user to the TTI Bundling state.
  • the data of the device is scrambled, and the data includes the second data repeatedly transmitted, and the initial value of the scrambling code sequence used each time the second data is transmitted is the same.
  • the scenario in which the user equipment in the TTI Bundling state exists in the cell may be an independently deployed Standalone base station.
  • an embodiment of the present invention provides a downlink channel descrambling method, where the method includes:
  • the user equipment sends a capability report message to the base station, and the capability report message indicates that the user equipment supports the downlink TTI Bundling; the user equipment receives the indication message that the base station sends the TTI Bundling state, and enters the TTI Bundling state according to the indication message; the user equipment receives multiple The first data is used to perform in-phase and quadrature component IQ data combining on the plurality of first data; the user equipment determines the scrambling code sequence corresponding to the TTI Bundling, and descrambles the combined first data by using the scrambling code sequence corresponding to the TTI Bundling.
  • the method further includes: the user equipment sends a channel quality measurement value to the base station, where the channel quality measurement value is used by the base station to determine whether to indicate the user according to the channel quality measurement value.
  • the device enters the TTI Bundling state.
  • the user equipment in the enhanced TTI Bundling state needs to be performed, and the initial values of the different scrambling code sequences are separately scrambled for the two user equipments. Therefore, the network system using this technology can be compatible with legacy user equipment and TTI Bundling user equipment at the same time, and has better flexibility in actual deployment.
  • the user equipment in the cell reports to the base station whether the message has the downlink TTI Bundling capability, and the base station indicates that the user equipment enters the TTI Bundling state according to the current channel quality, and the legacy user equipment and the TTI Bundling in the base station to the cell. After the user equipment is separately scrambled, the user equipment in the TTI Bundling state can perform descrambling. Therefore, the technical solution of the present invention can be compatible with both types of user equipments at the same time, thereby improving network deployment flexibility.
  • the embodiment of the invention provides a downlink channel scrambling device, which implements the function corresponding to the downlink channel scrambling method provided by the above first aspect.
  • the functions may be implemented by hardware or by executing corresponding software programs through hardware.
  • the hardware and software include one or more unit modules corresponding to the functions described above, which may be software and/or hardware.
  • the downlink channel scrambling device includes a judging unit and a scrambling unit from the function module, where:
  • the determining unit is configured to determine whether the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both in the cell, where the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement.
  • the user equipment in the legacy state is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement;
  • the scrambling unit is configured to use different interference on the data of the user equipment sent to the TTI Bundling state and the data of the user equipment sent to the Legacy state when determining that the user equipment of the TTI Bundling state and the user equipment of the Legacy state exist simultaneously
  • the scrambling code sequence generated by the initial value of the code sequence is scrambled separately.
  • the data that is sent by the base station to the user equipment in the TTI Bundling state includes the first data that is repeatedly sent, and the scrambling unit scrambles each of the first The initial value of the scrambling code sequence used by the data is the same.
  • the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time The initial value of the scrambling code sequence used by the scrambling unit to scramble the first data and the initial value of the scrambling code sequence used for transmitting the first data for the first time when the first channel transmits the first data. the same.
  • the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time The initial value of the scrambling code sequence determined according to the scrambling parameter, the scrambling parameter does not include the slot number in which the first channel is sent by the current channel, and the scrambling sequence used by the scrambling unit to scramble the first data when the first data is repeatedly transmitted.
  • the initial value is the same as the initial value of the scrambling code sequence used to transmit the first data for the first time.
  • the scrambling unit scrambles when the first data is sent for the first time.
  • the initial value of the scrambling code sequence used by the first data is according to the formula The initial value of the calculated scrambling sequence, where For the cell ID of the cell, c init is the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when transmitting the first data.
  • the scrambling unit scrambles when the first data is sent for the first time.
  • the initial value of the scrambling code sequence used by the first data is according to the formula The initial value of the calculated scrambling sequence, where The scrambling initialization parameter is initialized with the EPDCCH scrambling, in a range of 0 to 503, and c init is an initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is transmitted.
  • the scrambling unit scrambles when the first data is sent for the first time.
  • the initial value of the scrambling code sequence used by the first data is according to the formula The initial value of the calculated scrambling sequence, where For the cell ID of the cell, the n RNTI is the user equipment identifier in the TTI Bundling state, q is the codeword sequence number, and c init is the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is transmitted.
  • the apparatus further includes:
  • a receiving unit configured to receive a capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports the downlink TTI Bundling; the receiving unit is further configured to receive a channel quality measurement value sent by the user equipment; Determining whether the channel quality measurement value is lower than a channel quality preset value;
  • the device further includes: a sending unit, configured to: when the determined channel quality measurement value is lower than the channel quality preset value, send an indication message to indicate that the user equipment enters a TTI Bundling state; and the determining unit is specifically configured to: when the user equipment enters a TTI Bundling state The user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are determined in the cell.
  • a sending unit configured to: when the determined channel quality measurement value is lower than the channel quality preset value, send an indication message to indicate that the user equipment enters a TTI Bundling state
  • the determining unit is specifically configured to: when the user equipment enters a TTI Bundling state The user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are determined in the cell.
  • the scrambling unit is further configured to: when determining that only the user equipment in the TTI Bundling state exists in the cell, The data of the user equipment to the TTI Bundling state is scrambled, and the data includes repetition
  • the transmitted second data has the same initial value of the scrambling code sequence used by the scrambling unit each time the second data is transmitted.
  • the downlink channel scrambling device is a base station
  • the hardware base includes:
  • An interconnected transceiver, processor and memory a memory for storing program code, the processor invoking program code in the memory to perform all or part of the method steps of the downlink channel scrambling method of the first aspect.
  • the embodiment of the invention provides a downlink channel descrambling device, which specifically implements the function corresponding to the downlink channel descrambling method provided by the second aspect.
  • the functions may be implemented by hardware or by executing corresponding software programs through hardware.
  • the hardware and software include one or more unit modules corresponding to the functions described above, which may be software and/or hardware.
  • the downlink channel scrambling device includes:
  • a sending unit configured to send a capability report message to the base station, where the capability report message indicates that the user equipment supports the downlink TTI Bundling; the receiving unit is configured to receive the indication message that the base station sends the TTI Bundling state, and the state switching unit is configured to enter according to the indication message.
  • a receiving unit configured to receive a plurality of first data sent by the base station, an IQ combining unit, configured to perform in-phase and quadrature component IQ data combining the plurality of first data, and a descrambling unit, configured to: The scrambling code sequence corresponding to the TTI Bundling is determined, and the combined first data is descrambled using the scrambling code sequence corresponding to the TTI Bundling.
  • the downlink channel descrambling device is a user equipment, and the user equipment includes:
  • An interconnected transceiver, processor and memory a memory for storing program code, the processor invoking program code in the memory to perform all or part of the method steps of the second aspect of the downlink channel descrambling method.
  • the embodiment of the present invention further provides a computer storage medium, where the medium stores an application program, and the program includes all or part of the steps of the downlink channel scrambling method of the first aspect.
  • the base station first determines whether the user equipment in the TTI Bundling state in which the coverage enhancement needs to be simultaneously existed in the cell and the traditional legacy state that does not need to perform coverage enhancement. If the user equipment exists at the same time, the data of the user equipment sent to the TTI Bundling state and the data of the user equipment sent to the Legacy state are respectively scrambled. In the embodiment of the present invention, when the network side is scheduled, the user equipment is distinguished, and the user equipments of the two different states are used in different scrambling modes. Therefore, the network system using the technology can be compatible with the legacy user equipment and the TTI Bundling user equipment. , with better flexibility in actual deployment.
  • FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of modules included in an LTE communication system according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a process of processing physical link layer information at a transmitting end according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a process of processing physical link layer information at a receiving end according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a downlink channel scrambling method according to an embodiment of the present invention.
  • FIG. 6 is an information interaction diagram of performing state switching between a base station and a user equipment according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a frame when a base station sends data by using a downlink TTI Bundling technology according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of data merging on a TTI Bundling user equipment side according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a process for a base station to perform scrambling on a Legacy state and a TTI Bundling state user equipment according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of functional modules of a downlink channel scrambling apparatus according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of functional modules of a downlink channel descrambling apparatus according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of hardware of a base station and a user equipment according to an embodiment of the present invention.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonality
  • SC-FDMA single carrier FDMA
  • a CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like.
  • UTRA includes Wideband CDMA (W-CDMA) and other CDMA variants.
  • Cdma2000 covers the IS-2000, IS-95, and IS-856 standards.
  • a TDMA network can implement a radio technology such as the Global System for Mobile Communications (GSM).
  • the OFDMA network may implement radio technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and the like.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • Flash-OFDM Flash-OFDM
  • UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS).
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new UMTS versions that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP).
  • Cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used in the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, certain aspects of the techniques are described below for LTE, and LTE terminology is used in much of the description below.
  • the embodiment of the present invention introduces the scheme in detail in the context of applying to the LTE broadband system.
  • User Equipment related to the embodiments of the present invention may include a handheld device having a wireless communication function, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, and various forms.
  • User terminal equipment mobile station (MS), terminal, terminal equipment, and the like.
  • FIG. 1 is a schematic diagram of a wireless communication system, which includes a base station (referred to as an evolved NodeB in LTE, ie, an eNB) and a plurality of user equipments (or user terminals), which may have multiple cells or only a community.
  • a base station referred to as an evolved NodeB in LTE, ie, an eNB
  • a plurality of user equipments or user terminals, which may have multiple cells or only a community.
  • the embodiment of the present invention is applicable to the downlink technology. Therefore, in the embodiment of the present invention, the base station is a transmitting end, and the user equipment is a receiving end.
  • the source includes protocol stack processing and physical layer link processing with channel adaptation; the protocol stack processing part includes PDCP group packet/segmentation, IP data header addition, etc., physical layer link processing includes CRC, Code modulation, etc.
  • the channel is the transmission medium in the wireless communication system. It is affected by the natural environment and the movement of the terminal. It needs to resist the adverse conditions such as multipath interference and Doppler frequency shift.
  • the sink is the receiving end of the source, and the processing is the letter. The inverse of the combined effects of source processing and channel condition estimation, that is, not only the reverse processing of the source but also the influence of the channel should be balanced as much as possible.
  • the physical layer link processing of the PDCCH is further divided into bit level processing (0/1 binary data) and symbol level/IQ data processing according to the data format.
  • the bit-level processing includes performing cyclic redundancy check (English: Cyclic Redundancy Check, CRC) on the downlink control information (English: Downlink Control Information, DC for short), and then performing convolutional coding, and then performing the rate. Matching, and then multiplexing the bit data of the rate matching of multiple user equipments, and then performing scrambling. Modulation is performed after scrambling to generate modulation symbols.
  • Subsequent symbol level/IQ data processing includes: layer mapping the modulation symbols, precoding the data after the layer mapping, mapping the data to different antenna ports, performing resource mapping on each antenna port, and generating orthogonality. Frequency division multiplexing (English: Orthogonal Frequency Division Multiplexing, OFDM for short), then inverse transform IFFT, and then OFDM symbols are transmitted.
  • the IQ data is obtained by converting/mapping the binary data by the modulation module/constellation point mapping module.
  • the constellation point mapping scheme for different modulation modes in the LTE protocol is listed in 3GPP TS 36.211, wherein the PDCCH channel is fixed by QPSK modulation, QPSK modulation. The parameters used are shown in Table 1.
  • the PDCCH physical layer link processing procedure at the receiving end is as shown in FIG. 4 .
  • the process of physical layer link processing of the PDCCH is opposite to the PDCCH physical layer link processing procedure of the transmitting end shown in FIG.
  • the data format it is divided into symbol level/IQ data processing and bit level processing (0/1 binary data).
  • the symbol level/IQ data processing includes performing fast Fourier transform (FFT) transform on the received air interface data, performing solution resource mapping, layer layer mapping and precoding, and demodulating to obtain bit level data.
  • the bit level processing includes descrambling the demodulated data, performing de-rate matching, decoding, and decoding the CRC to obtain the original DCI data.
  • FFT fast Fourier transform
  • TTI bundling technology In the downlink transmission process, in order to enhance the coverage of the signal, a technique of repeated transmission, that is, TTI bundling technology is adopted.
  • the TTI Bundling technology is a protocol T and a repetition number N of the transmitting end and the receiving end.
  • the true starting point of the period may be the moment that satisfies the following formula: It may also be a sliding time window (for example, the starting position may be any sub-frame in the sliding window), ie the moment that satisfies the following formula: Where ⁇ is the sliding window range, and the value ranges from 0 to (T-1); it may also be that the receiving end obtains the presence of the blind detection signal (the first valid downlink subframe after the start position configured at the transmitting end is true) Starting point), in the period, the transmitting end repeatedly transmits the data to be enhanced, and the receiving end performs energy combining of the data according to the number of repetitions in the period, that is, one data packet is continuously on multiple TTI resources. The transmission is repeated, and the receiving end combines the data on multiple TTI resources to achieve the purpose of enhanced coverage.
  • the downstream TTI Bundling (or Repetition, the same below) is continuous to the downlink.
  • the TTI is bound to the TTI and the continuously bound TTI is allocated to the same user equipment. This improves the probability of successful data decoding and improves the downlink coverage of LTE.
  • the cost is increased by some time delay.
  • the effective TTI refers to a TTI that can perform downlink data transmission, and does not include an uplink TTI, a TTI that does not occupy a channel, and the like.
  • the TTI Bundling technology is used for coverage enhancement, that is, the transmission is repeatedly transmitted by the transmitting end, and the receiving end is combined for multiple times to perform downlink coverage enhancement.
  • eMTC further reduces the cost and reduces the bandwidth to 1.4MHz. It is a narrowband system applied to LTE. It is not applied to broadband systems.
  • TTI bundling to implement downlink coverage enhancement, it does not support PDCCH.
  • the MPDCCH is adopted, so that it is not compatible with the legacy legacy terminal. For example, it is no longer compatible with LAA terminals that operate at both the authorized frequency and the unlicensed frequency.
  • the authorized frequency is responsible for access and control channel transmission, and the unlicensed frequency is used for data transmission. .
  • the PDCCH/EPDCCH or PDSCH channel data can be combined with the IQ data, and the LAA terminal can be supported in the past.
  • the base station determines whether the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both in the cell;
  • the user equipment in the TTI Bundling state in the embodiment of the present invention is a user equipment that uses TTI Bundling for coverage enhancement when the base station sends downlink data, and may also be called a TTI Bundling user, and the user equipment in the legacy state is sent by the base station.
  • the downlink data does not use TTI Bundling for coverage enhanced user equipment, and can also be called Legacy user.
  • some user equipments can enter the TTI Bundling state by the legacy state as needed.
  • the legacy state can be entered into the TTI Bundling state. Coverage enhancement.
  • the Legacy state and the TTI bundling state of the user equipment can be switched at any time.
  • the user The device is in the Legacy state, otherwise it is in the TTI bundling state.
  • the user equipment sends a capability report message to the base station, where the capability report message is used to report that the user equipment supports the downlink TTI Bundling, that is, the downlink TTI Bundling capability.
  • the base station only enhances coverage for user equipments with TTI Bundling capability, and does not enhance coverage for user equipments that do not have TTI Bundling capability.
  • the user equipment with TTI Bundling capability needs to have a buffering capability to be able to combine data of at least two subframes.
  • the user equipment measures downlink channel quality.
  • the user equipment periodically measures the downlink channel quality, and the specific measurement manner includes downlink reference signal receiving power (English: Reference Signal Receiving Power, referred to as: RSRP) measurement, and/or signal interference noise ratio (English: signal to interference plus Noise ratio (SINR).
  • RSRP Reference Signal Receiving Power
  • SINR signal interference plus Noise ratio
  • the user equipment sends the channel quality measurement value to the base station.
  • the user equipment periodically measures the downlink channel quality, and reports the measurement result (channel quality measurement value) to the base station periodically or triggeringly.
  • the base station determines, according to the channel quality measurement value, if the channel quality measurement value is lower than the channel quality preset value, indicating that the user equipment enters a TTI Bundling state.
  • the base station After receiving the report result of the user terminal, the base station determines whether the reported channel quality measurement value is lower than a preset channel quality preset value of the system. If the base station is lower, it indicates that the downlink channel quality of the user equipment is poor and needs to be covered. Therefore, the base station sends an indication message to the user equipment to indicate that the user equipment enters the TTI Bundling state by the Legacy state, where the indication message may be a DCI 1A message, and the base station may notify the user equipment to enter the TTI Bundling state through the DCI 1A message, or may be The high-level control unit notifies the user equipment to enter the TTI Bundling state.
  • the indication message may be a DCI 1A message
  • the base station may notify the user equipment to enter the TTI Bundling state through the DCI 1A message, or may be The high-level control unit notifies the user equipment to enter the TTI Bundling state.
  • the preset channel quality preset value of the system can be: -100dBm, that is, when the measurement result reported by the user equipment is lower than -100dBm When it is indicated, the user terminal needs to perform coverage enhancement; if SINR is used If the channel quality measurement is performed, the preset channel quality preset value of the system may be: -5 dB, that is, when the measurement result reported by the user equipment is lower than -5 dB, it indicates that the user terminal needs to perform coverage enhancement.
  • the base station sends an indication message to the user equipment to indicate that the user equipment enters the Legacy state by the TTI Bundling state.
  • the user equipment enters a TTI Bundling state according to the indication message.
  • the user equipment enters the TTI Bundling state from the Legacy state.
  • the user equipment After the user equipment enters the TTI Bundling state from the Legacy state, the user equipment sends a notification message of successfully entering the TTI Bundling state to notify the base station to synchronously update the state of the user equipment on the base station side.
  • the base station can determine that the user equipment in the TTI Bundling state exists in the cell, and the other user equipment that does not enter the TTI Bundling state is in the Legacy state, so the base station can determine the user equipment and the Legacy status user that have both the TTI Bundling state in the cell. device. At this time, the base station performs step 502.
  • the base station may determine that the user equipment in the TTI Bundling state does not exist in the cell, and only the user equipment in the legacy state is present.
  • the manner defined in 3GPP TS 36.211 scrambles the user equipment in the legacy state.
  • the base station If there is only a user equipment in the TTI Bundling state in the cell, the base station performs step 503.
  • the base station scrambles the data of the user equipment sent to the TTI Bundling state and the data of the user equipment sent to the Legacy state by using different scrambling code sequences generated by the scrambling sequence initial value Cinit.
  • DCI information of all users in one TTI needs to be user-multiplexed before scrambling, and then cell-level scrambling is uniformly performed for all users.
  • the user equipment is divided into a user equipment in a legacy state and a user equipment in a TTI Bundling state.
  • the user equipment in the legacy state does not need to perform data repetition, and the user equipment in the TTI Bundling state needs to perform repeated data transmission.
  • the transmitting side needs to separately scramble the multiplexed information.
  • the base station scrambles the data of the user equipment transmitted to the TTI Bundling state and the scrambling code sequence generated by using the different scrambling sequence initial values for the data of the user equipment transmitted to the legacy state.
  • the initial value of the scrambling code sequence is used to generate a scrambling code sequence. If the initial value of the scrambling code sequence is different, the generated scrambling code sequence is also different; if the initial value of the scrambling code sequence is the same, the generated scrambling code sequence is the same, and vice versa.
  • the initial value of the scrambling sequence for the user equipment of the legacy state is generated in the same manner as the initial value of the initialization sequence defined in the 3GPP TS 36.211 standard.
  • the initial value of the scrambling code sequence each time data is transmitted is related to time, wherein time is a time-related parameter such as a slot number and a subframe number, that is, an initial value of the scrambling code sequence each time data is transmitted along with a slot number or The sub-frame number changes as a function of time parameters; and the resource mapping position transmitted each time can also be dynamically adjusted.
  • the initial value of the scrambling sequence may be Where c init is the initial value of the scrambling code sequence, and n s is the slot number of the data transmitted by the current PDCCH channel.
  • the initial value of the scrambling sequence may be Where c init is the initial value of the scrambling code sequence,
  • the scrambling initialization parameter is initialized with the EPDCCH scrambling, and the value ranges from 0 to 503.
  • the EPDCCH scrambling sequence initialization parameter is, for example, for the data of the user equipment sent to the Legacy state in the PDSCH channel, the initial value of the scrambling sequence may be Where c init is the initial value of the scrambling code sequence, q is the codeword sequence number, and n RNTI is the user equipment identifier. The cell ID of the cell where the user equipment is located.
  • the scrambling of user equipment in the TTI Bundling state is described in detail below.
  • the base station repeatedly transmits each packet of data of the user equipment sent to the TTI Bundling state, and the frame structure when the base station transmits the downlink data is as shown in FIG. 7.
  • the TTI Bundling period T is the time agreed by the base station and the user equipment, that is, the relative total for multiple transmissions of one data packet. length of time.
  • the base station needs to send the data packet 1, the data 2, the data packet 3, and the data packet 4 to the user terminal.
  • the data packet 1 is repeatedly transmitted multiple times, and the second one is transmitted.
  • the data packet 2 is repeatedly transmitted multiple times, and in the third TTI Bundling period T, the data packet 3 is repeatedly transmitted multiple times, and in the fourth TTI Bundling period T, the data packet 4 is repeated. Send multiple times.
  • each subframe in a TTI Bundling subframe carries the same packet data, and the number of TTI Bundling subframes is the number M of times the packet is transmitted.
  • M is equal to 7.
  • the first transmission of the data packet is referred to as "first transmission”
  • the subsequent N transmission of the data packet is referred to as “repetitive transmission”.
  • N is equal to 6.
  • a TTI Bundling period T the specific form of the frame structure is not limited.
  • the first three subframes are TTI Bundling subframes, and after four uplink subframes and some unoccupied subframes, four TTI Bundling children are consecutively connected.
  • the first few subframes are unoccupied, followed by 7 TTI Bundling subframes; in the third TTI Bundling period T and the first TTI Bundling period T Similarly, the first three subframes are TTI Bundling subframes, and after four uplink subframes and some unoccupied subframes, four TTI Bundling subframes are consecutive; in the fourth TTI Bundling period T, in some uplink subframes. After that, there are three TTI Bundling subframes, followed by some unoccupied subframes, and there are four TTI Bundling subframes.
  • only four TTI Bundling periods T are taken as an example, and the specific form of the frame structure is not limited.
  • the user equipment unit After the base station repeatedly transmits each packet of data of the user equipment sent to the TTI Bundling state, the user equipment unit combines the data of each packet according to the number of repetitions, and the data is merged at the user equipment end as shown in FIG.
  • the merging of the IQ data may be employed, as in the merging mode 1 shown in FIG. 8; the merging of the LLR data may also be performed, as shown in the merging mode 2 shown in FIG.
  • the scope applicable to the embodiment of the present invention is the merging of the IQ data shown in the merge mode one.
  • the base station side needs to make the TTI Bundling user transmit the TTIs in each repetition, and the resource mapping locations are the same as the mapping locations sent for the first time.
  • the resource mapping position of each user is determined by the network side, and the user equipment side performs the detection of the user PDCCH/EPDCCH by blindly detecting each search space. Therefore, in order to ensure that the PDCCH/EPDCCH data can be correctly merged, the base station side needs to ensure that the TTI Bundling user is in the TTI for each repeated transmission, and the mapping position of the PDCCH/EPDCCH is the same as the mapping position of the first transmission.
  • the resource mapping position is indicated by the PDCCH/EPDCCH for each PDSCH channel that is repeatedly transmitted. Since the original data transmitted by the PDCCH/EPDCCH is the same, the TTI of the PDSCH is actually transmitted every time. The resource locations of the PDSCH are the same.
  • the transmitting side since the receiving side has not performed the descrambling process, the transmitting side also needs to ensure that each TTI that the TTI Bundling user repeatedly transmits, the scrambling code sequence used remains unchanged, that is, the scrambling code is required to be generated.
  • the initial value of the scrambling sequence of the sequence, Cinit remains unchanged. Therefore, the initial value of the scrambling code sequence used for the data of the user equipment transmitted to the TTI Bundling state is no longer closely related to the time parameters such as the slot number and the subframe number.
  • the base station repeatedly transmits each packet of data of the user equipment that is sent to the TTI Bundling state.
  • the following is an example of repeatedly transmitting the first data as an example to describe that the initial value of the scrambling code sequence used to scramble the first data remains unchanged.
  • the "first” here is not a description of a specific data sequence.
  • the "first data” is an example of one packet of data of a user equipment that is sent by the base station to the TTI Bundling state.
  • the data packet sent in each TTI Bundling period T can be regarded as "first data", that is, "first data” can be data packet 1, data packet 2, or data packet 3 It can also be packet 4.
  • the initial value of the specific scrambling code sequence can be calculated in the following ways:
  • the initial value of the scrambling code sequence used by the first subframe in which the first data is sent is time-dependent, where the current channel first transmits the time-related parameters such as the slot number and the subframe number where the first data is located,
  • the initial value of the scrambling code sequence used to repeatedly transmit the first data is then the same as the initial value of the scrambling code sequence used for first transmitting the first data.
  • the initial value of the scrambling code sequence used for the first transmission of the first data sent by the base station to the TTI Bundling user equipment may be the same as that of the legacy user, related to the slot number or the subframe number, and then the initial value of the scrambling code sequence used for repeated transmission. It is the same as the initial value of the scrambling code sequence used for the first transmission, regardless of the slot number or subframe number.
  • the initial value of the scrambling code sequence used for transmitting the first data for the first time may be c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current PDCCH channel.
  • the initial value of the scrambling code sequence used for transmitting the first data for the first time may be c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current EPDCCH channel.
  • the value ranges from 0 to 503.
  • the initial value of the scrambling code sequence remains unchanged, that is, the slot number used by the c init is calculated using the slot number used for the first transmission. If the number of times of repeating the first data is 4 times in one cycle, the initial value of the scrambling code sequence used each time is the same as the initial value of the scrambling code sequence used for the first transmission in the subsequent 3 repeated transmissions. Therefore, the scrambling sequence used in the subsequent three repeated transmissions is independent of the slot number.
  • the initial value of the scrambling code sequence used for transmitting the first data for the first time is
  • c init is the initial value of the scrambling code sequence
  • q is the codeword sequence number
  • n RNTI is the user equipment identifier
  • n s is the time slot number where the first data is sent by the current PDSCH channel.
  • the initial value of the scrambling code sequence used each time and the scrambling code used for the first transmission are used in the subsequent three repeated transmissions.
  • the initial values of the sequences are the same, so the scrambling sequence used in the subsequent three repeated transmissions is independent of the slot number.
  • the formula for calculating the initial value of the scrambling code sequence used in the PDCCH/EPDCCH channel and the PDSCH channel is only a feasible implementation manner, and other calculation formulas may be adopted according to actual conditions, and may be Other parameters get the initial value of the scrambling code sequence.
  • the initial value of the scrambling code sequence used for transmitting the first data for the first time is an initial value of the scrambling code sequence determined according to the scrambling parameter, where the scrambling parameter does not include the current channel where the first data is sent for the first time.
  • the slot number (or subframe number), that is, the initial value of the scrambling code sequence used for the first transmission is also independent of time (time refers to a time-related parameter such as a subframe number or a slot number), and the subsequent repetition is transmitted.
  • the initial value of the scrambling code sequence used for a data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time. In this manner, the TTI for the first transmission and the repeated transmission may not affect the influence of the slot number or the subframe number.
  • the initial value of the scrambling code sequence used for the first transmission and the repeated transmission (ie, each transmission) of the first data may be That is, the initial value of the scrambling code sequence is only related to the cell ID of the cell.
  • the initial value of the scrambling code sequence used for the first transmission and the repeated transmission (ie, each transmission) of the first data may be That is, the initial value of the scrambling code sequence is only related to the EPDCCH scrambling initialization parameter. related, The value ranges from 0 to 503.
  • the initial value of the scrambling code sequence used for the first transmission and the repeated transmission (ie, each transmission) of the first data may be That is, the initial value of the scrambling code sequence is related to the user equipment identifier, the codeword sequence number, and the cell ID.
  • the formula for calculating the initial value of the scrambling code sequence used by the PDCCH/EPDCCH channel and the PDSCH channel is only a feasible implementation manner, and other calculations may be adopted according to actual conditions.
  • the formula can obtain the scrambling initialization sequence according to other parameters, and can even generate the initial value of the scrambling sequence according to a random value.
  • the multiplexed bit block is among them For the number of bits of the i-th PDCCH channel transmitted in one subframe, n PDCCH is the number of PDCCHs corresponding to the subframe; the multiplexed bit block is scrambled as follows:
  • bit block is Where c (i) is a pseudo-random scrambling sequence, the scrambling sequence generator initialization init, init value of c is determined by c by the first embodiment and the second embodiment in the calculation method of the PDCCH channel c init .
  • bit block before each user scrambling is b(0),...,b(M bit -1), where The number of bits transmitted for the user EPDCCH channel within one subframe. Bit blocks are scrambled as follows:
  • bit block is Where c (i) is a pseudo-random scrambling sequence, the scrambling sequence generator initialization init, init value of c is determined by c by the first embodiment and the second embodiment in the calculation method of EPDCCH channel c init .
  • the codeword q is scrambled before the bit block is among them The number of bits corresponding to the codeword q transmitted on the physical channel in one subframe; the codeword q is scrambled as follows:
  • the bit block is Where c (q) (i) is a pseudo-random scrambling sequence, the scrambling sequence generated by the initialization c init, c init values by the first embodiment and the second embodiment of the PDSCH channel c init The calculation method is determined.
  • the scrambling pseudo-random sequence generation process is as follows:
  • the pseudo-random sequence c(n) is generated by the Gold sequence and is defined as follows:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n)) mod 2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n)) mod 2
  • the multiplexed original information including the original data of the user equipment sent to the legacy state and the original data of the user equipment sent to the TTI Bundling state, needs to be scrambled separately because the initial values of the scrambling sequence c init may be different.
  • the case where the scrambled channel is the PDCCH channel and the original information is the DCI original information is taken as an example for description.
  • a scrambling code of length M bit is generated according to the initial value of the scrambling code sequence of the user equipment in the legacy state, and the scrambling code sequence in the same bit order is used according to the scheduling indication.
  • the DCI information of the user of the corresponding location is scrambled, and the DCI information of the user equipment in the TTI Bundling state is not scrambled, and the scrambling code sequence of the DCI length corresponding to the user equipment in the TTI Bundling state is also required.
  • the scrambling code of the length M bit is also generated, and according to the scheduling indication, the DCI information of the user equipment in the TTI Bundling state at the corresponding position is performed by using the scrambling code sequence in the same bit order.
  • the DCI information of the user equipment in the Legacy state is no longer scrambled, and the scrambling code sequence of the DCI length corresponding to the user equipment of the Legacy state is also required.
  • DCI information that has undergone two independent scrambling is obtained, and the bearer information is transmitted on the PDCCH channel of the TTI.
  • the scrambled channel is an EPDCCH channel and the original information is DCI original information
  • the EPDCCH scrambling is processed according to the user, and different scrambling code sequences are used corresponding to scrambling according to the user state.
  • the scrambled channel is a PDSCH channel and the original information is Data original information
  • the PDSCH scrambling is processed according to the user, and different scrambling code sequences are used for scrambling according to the user state.
  • the base station scrambles data of the user equipment sent to the TTI Bundling state.
  • step 502 in order to be compatible with the Legacy user, the transmitting side distinguishes the Legacy user from the TTI Bundling user, and generates a scrambling code sequence for the two users using different scrambling code sequence initial values.
  • a Standalone base station that is deployed independently needs to support the user with the coverage enhancement.
  • the legacy user may no longer exist.
  • the base station side can no longer distinguish between the legacy user and the TTI Bundling user.
  • the base station performs coverage enhancement on the data sent to all user equipments, that is, repeatedly transmits each packet of data sent to all user equipments.
  • the implementation requirements for coverage enhancement of TTI Bundling users using the downlink TTI Bundling technology are the same as those for the TTI Bundling users in step 502. Taking the second data repeatedly as an example, the requirements to be met include:
  • the original data repeatedly sent must be the same for each TTI that is repeatedly sent;
  • the resource mapping location needs to be the same for each TTI that is repeatedly sent
  • the initial value of the scrambling code sequence used remains unchanged for each TTI that is repeatedly transmitted.
  • the “second” in the second data herein is not a description of a specific data sequence, but only one of the data sent by the base station to the user equipment is taken as an example.
  • the base station when the base station is deployed, all the user equipments in a certain cell support TTI Bundling. In the cell, only the TTI Bundling user equipment requiring coverage enhancement exists, and the base station can confirm the cell. There are only TTI Bundling user devices. The capability reporting message can also be reported by all the users in the cell to inform the TTI Bundling capability. The base station instructs all user equipments to enter the TTI Bundling state. In this manner, the base station can determine the user equipment in the cell with only the TTI Bundling state. It is also determined by other means, which is not limited by the embodiment of the present invention.
  • the base station performs coverage enhancement on all user equipments in the cell, and the initial value of the scrambling code sequence used in scrambling is independent of time-related parameters such as the subframe number/slot number, thereby simplifying the transmitting side. deal with.
  • the following describes the user equipment to perform IQ data merging on the received data.
  • the state of the user equipment side is configured by the network side, that is, it is in the Legacy state or the TTI Bundling state is configured by the base station.
  • the user equipment in the legacy state does not need to perform data merging, and the receiving processing mode is unchanged from 3GPP TS 36.211.
  • the user equipment in the TTI Bundling state can directly perform IQ data merging, and then adopt TTI Bundling corresponding to the constellation point mapping/solution IQ data.
  • the scrambling sequence is descrambled and decoded.
  • the user when the network side is scheduled, the user is divided into user equipments that do not need to be covered in the enhanced legacy state and user equipments that need to be in the enhanced TTI Bundling state, and the two user equipments are different.
  • the initial values of the scrambling sequence are scrambled separately.
  • the initial value of the scrambling code sequence is generated in the same manner, and only the initial value of the scrambling code sequence that needs to cover the enhanced TTI Bundling state is changed, so the technology is used.
  • the network system can be compatible with both legacy user equipment and TTI Bundling user equipment, providing greater flexibility in actual deployment.
  • the foregoing is a description of the downlink channel scrambling and descrambling method in the embodiment of the present invention.
  • the following is a downlink channel scrambling device, a downlink channel descrambling device, and a base station and user equipment in the downlink coverage enhancement system in the embodiment of the present invention.
  • the downlink channel scrambling device includes:
  • the determining unit 901 is configured to determine, in the cell, whether the user equipment in the TTI Bundling state and the user equipment in the traditional legacy state are both in the TTI Bundling state, where the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement.
  • the user equipment of the device in the legacy state is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement;
  • the scrambling unit 902 is configured to: when determining that the user equipment of the TTI Bundling state and the user equipment of the Legacy state exist simultaneously, the data of the user equipment sent to the TTI Bundling state is different from the data of the user equipment sent to the Legacy state.
  • the scrambling code sequence generated by the initial value of the scrambling code sequence is scrambled separately.
  • the data of the user equipment that is sent by the base station to the TTI Bundling state includes the first data that is repeatedly sent, and the initial scrambling code sequence used by the scrambling unit 902 to scramble the first data each time the first data is sent.
  • the values are the same.
  • the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data is related to the slot number in which the current channel first transmits the first data, and the first data is repeatedly sent.
  • the initial value of the scrambling code sequence used by the time scrambling unit 902 to scramble the first data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time.
  • the initial value of the scrambling sequence used for transmitting the first data for the first time may be c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current PDCCH channel.
  • the initial value of the scrambling sequence used for transmitting the first data for the first time may be c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current EPDCCH channel.
  • the value ranges from 0 to 503.
  • the initial value of the scrambling sequence used for transmitting the first data for the first time may be
  • c init is the initial value of the scrambling code sequence
  • q is the codeword sequence number
  • n RNTI is the user equipment identifier
  • n s is the time slot number where the first PDCCH channel first transmits the first data.
  • the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is sent for the first time is the initial value of the scrambling code sequence determined according to the scrambling parameter, and the scrambling parameter does not include the current channel.
  • the slot number in which the first data is transmitted for the first time, and the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is repeatedly transmitted is the same as the initial value of the scrambling code sequence used for first transmitting the first data.
  • the scrambling unit 902 scrambles the first data when the first data is sent for the first time.
  • the initial value of the scrambling sequence is according to the formula The initial value of the calculated scrambling sequence, where For the cell ID of the cell, c init is the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is transmitted.
  • the scrambling unit 902 scrambles the first data when the first data is sent for the first time.
  • the initial value of the scrambling sequence is according to the formula The initial value of the calculated scrambling sequence, where To initialize the parameter with the EPDCCH, the value ranges from 0 to 503, and c init is the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is transmitted.
  • the scrambling unit 902 scrambles the first data when the first data is sent for the first time.
  • the initial value of the scrambling sequence is according to the formula The initial value of the calculated scrambling sequence, where For the cell ID of the cell, n RNTI is the user equipment identifier of the TTI Bundling state, q is the codeword sequence number, and c init is the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is transmitted.
  • the apparatus further includes:
  • the receiving unit 903 is configured to receive a capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports the downlink TTI Bundling;
  • the receiving unit 903 is further configured to receive a channel quality measurement value sent by the user equipment;
  • the determining unit 901 is further configured to determine whether the channel quality measurement value is lower than a channel quality preset value
  • the device also includes:
  • the sending unit 904 is configured to: when determining that the channel quality measurement value is lower than the channel quality preset value, send an indication message to indicate that the user equipment enters a TTI Bundling state;
  • the determining unit 901 is specifically configured to: when the user equipment enters the TTI Bundling state, determine the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state in the cell.
  • the scrambling unit 902 is further configured to: when determining that only the user equipment in the TTI Bundling state exists in the cell, the data of the user equipment sent to the TTI Bundling state is scrambled, where the data includes repeated sending.
  • the second data has the same initial value of the scrambling code sequence used by the scrambling unit each time the second data is transmitted.
  • the downlink channel descrambling device includes:
  • the sending unit 1001 is configured to send a capability report message to the base station, where the capability report message indicates that the user equipment supports the downlink TTI Bundling;
  • the receiving unit 1002 is configured to receive an indication message that is sent by the base station and enters a TTI Bundling state.
  • the state switching unit 1003 is configured to enter a TTI Bundling state according to the indication message
  • the receiving unit 1002 is further configured to receive multiple first data sent by the base station;
  • An IQ combining unit 1004 configured to perform in-phase and quadrature component IQ data combining on the plurality of first data
  • the descrambling unit 1005 is configured to determine a scrambling code sequence corresponding to the TTI Bundling, and descramble the combined first data by using a scrambling code sequence corresponding to the TTI Bundling.
  • the sending unit 1001 is further configured to send, to the base station, a channel quality measurement value, where the channel quality measurement value is used by the base station to determine, according to the channel quality measurement value, whether the user equipment is indicated. Enter the TTI Bundling state.
  • the hardware structure of the base station and the user equipment in the embodiment of the present invention is as shown in FIG. 12, and the user equipment and the base station in the system in the implementation of the present invention respectively have the functions of the user equipment and the base station in the foregoing method embodiment. .
  • the user equipment performs wireless communication through the link and the base station.
  • the base station provides wireless access of the user equipment to the network, including one or more processors, one or more memories, one or more network interfaces, and one or more transceivers (each transceiver including the receiver Rx and the transmitter) Machine Tx), connected via bus.
  • One or more transceivers are coupled to the antenna or antenna array.
  • the one or more processors include computer program code.
  • the network interface is connected to the core network through a link (eg, a link to the core network) or to other base stations via a wired or wireless link.
  • the processor executes a series of computer program code instructions in the memory to perform all or part of the steps performed by the base station in the foregoing method embodiments, mainly:
  • the device is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement; when determining that both the user equipment of the TTI Bundling state and the user equipment of the legacy state are present, the data and the pair of the user equipment sent to the TTI Bundling state are sent to The data of the user equipment in the Legacy state is scrambled separately using the scrambling code sequences generated by different initial values of the scrambling code sequence.
  • the user equipment includes one or more processors, one or more memories, and one or more transceivers (each transceiver including a transmitter Tx and a receiver Rx) connected by a bus.
  • One or more transceivers are coupled to one or more antennas.
  • the computer program code is included in the one or more memories, and the processor executes a series of computer program code instructions in the memory to perform all or part of the steps performed by the user equipment in the foregoing method embodiments, mainly:
  • the TTI Bundling receives the indication message sent by the base station to enter the TTI Bundling state through the receiver, and enters the TTI Bundling state according to the indication message; receives the plurality of first data sent by the base station by using the receiver, and then performs the multiple first data by using the receiver.
  • the in-phase and quadrature component IQ data are combined, and the scrambling code sequence corresponding to the TTI Bundling is determined, and the combined first data is descrambled using the scrambling code sequence corresponding to the TTI Bundling.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, may be located in one place. Or it can be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

Provided are a downlink channel scrambling and descrambling method, a base station and a user equipment, which can be used to perform coverage enhancement on some users while a legacy user equipment can be compatible, thereby improving the flexibility of network deployment. The method of the embodiments of the present invention comprises: a base station determining whether a user equipment, needing to perform coverage enhancement, in a TTI Bundling state and a user equipment, not needing to perform coverage enhancement, in a legacy state simultaneously exist in a cell; and if same exist simultaneously, the base station using scrambling sequences generated by different scrambling sequence initial values to respectively scramble data sent to the user equipment in the TTI Bundling state and data sent to the user equipment in the legacy state. According to the embodiments of the present invention, users are distinguished at a base station side, and different scrambling sequence initial values are used for scrambling these two types of user equipment, so that a legacy user equipment and a TTI Bundling user equipment can be compatible simultaneously, having better flexibility in actual deployment.

Description

下行信道加扰、解扰的方法、装置、基站及用户设备Method, device, base station and user equipment for downlink channel scrambling and descrambling 技术领域Technical field
本申请涉及通信领域，尤其涉及一种下行信道加扰、解扰的方法、装置、基站及用户设备。The present application relates to the field of communications, and in particular, to a method, an apparatus, a base station, and a user equipment for downlink channel scrambling and descrambling.
背景技术Background technique
随着3GPP长期演进(英文：Long Term Evolution，简称：LTE)应用的大幅普及，存在许多需要深度覆盖的场景，以增强边缘用户体验。LTE中的覆盖增强技术分为上行覆盖增强技术和下行覆盖增强技术。上行覆盖增强技术主要包括传输时间间隔绑定(TTIBundling)、功率增强(PowerBoosting)等；下行覆盖增强技术主要包括提高输出功率，增加发送天线个数等。With the proliferation of 3GPP Long Term Evolution (LTE) applications, there are many scenarios that require deep coverage to enhance the edge user experience. The coverage enhancement technology in LTE is divided into uplink coverage enhancement technology and downlink coverage enhancement technology. The uplink coverage enhancement technology mainly includes the transmission time interval binding (TTIBundling) and the power enhancement (Power Boosting). The downlink coverage enhancement technology mainly includes increasing the output power and increasing the number of transmitting antennas.
鉴于LTE小站可以快速部署，易安装等特点，基于小站的应用也越来越广，许多企业和办公场所都倾向于采用小站***部署。由于小站的下行发送功率受限(一般与终端最大发送功率相同)，且不便使用多天线技术，因此，下行覆盖增强的一种新的技术方案为类似于上行覆盖增强技术——TTI Bundling，或称之为Repetition技术(下同)。具体为：下行发送端可以通过重复发送数据，接收端通过数据合并实现能量汇聚以提高解调性能。和目前LTE标准中只对物理上行共享信道(英文：Physical Uplink Shared Channel，简称：PUSCH)进行上行TTI Bundling不同的是，在深度覆盖场景下，需要对所有下行信道进行覆盖增强。In view of the fact that LTE stations can be quickly deployed and easy to install, applications based on small stations are becoming more and more widespread, and many enterprises and office places tend to adopt small station system deployment. Since the downlink transmission power of the small station is limited (generally the same as the maximum transmission power of the terminal), and the multi-antenna technology is inconvenient, a new technical solution for downlink coverage enhancement is similar to the uplink coverage enhancement technology, TTI Bundling. Or called Repetition technology (the same below). Specifically, the downlink transmitting end can repeatedly transmit data, and the receiving end implements energy aggregation through data combining to improve demodulation performance. Different from the uplink TTI Bundling of the Physical Uplink Shared Channel (PUSCH) in the current LTE standard, in the deep coverage scenario, coverage enhancement is required for all downlink channels.
LTE R13标准中，引入了增强型机器通信(英文：enhanced Machine-Type Communication，简称：eMTC)的标准。为实现下行覆盖增强，eMTC不再支持物理下行控制信道(英文：Physical Downlink Control Channel，简称：PDCCH)，控制信道采用MTC物理下行控制信道(英文：MTC Physical Downlink Control Channel，简称：MPDCCH)。为了保证接收端能够进行同相和正交分量(英文：In-phase and Quadrature Components，简称：IQ)数据的合并，eMTC对MPDCCH和物理下行共享信道(英文：Physical Downlink Shared  Channel，简称：PDSCH)的加扰初始化序列值均进行了相应的修改，即保证在Nacc个子帧周期内(Nacc：加扰序列保持不变的连续绝对子帧个数)，加扰序列维持不变，且与该周期内的首子帧的加扰序列相同。In the LTE R13 standard, the standard of Enhanced Machine-Type Communication (eMTC) is introduced. To implement the downlink coverage enhancement, the eMTC does not support the physical downlink control channel (English: Physical Downlink Control Channel, PDCCH for short), and the control channel uses the MTC physical downlink control channel (English: MTC Physical Downlink Control Channel, MPDCCH for short). In order to ensure that the receiving end can perform in-phase and quadrature component (English: In-phase and Quadrature Components, IQ: merging) data, the eMTC pairs the MPDCCH and the physical downlink shared channel (English: Physical Downlink Shared Channel, PDSCH for short) The scrambling initialization sequence values are all modified accordingly, that is, within N acc subframe periods (N acc : the number of consecutive absolute subframes in which the scrambling sequence remains unchanged), the scrambling sequence remains unchanged, and The scrambling sequence of the first sub-frame in the cycle is the same.
现有技术通过配置加扰序列维持不变的周期的长度，可以保证接收端在这个周期内进行IQ数据的合并。但由于不再支持PDCCH信道，该方案不再前向兼容legacy终端，比如LAA终端。In the prior art, by configuring the scrambling sequence to maintain the length of the constant period, it is ensured that the receiving end performs IQ data merging in this period. However, since the PDCCH channel is no longer supported, the scheme is no longer forward compatible with legacy terminals, such as LAA terminals.
发明内容Summary of the invention
本申请提供了一种下行信道加扰、解扰方法、装置、基站及用户设备，可以在实现对部分用户进行覆盖增强的同时兼容legacy用户设备，提升了网络部署灵活性。The present application provides a downlink channel scrambling and descrambling method, a device, a base station, and a user equipment, which can be compatible with legacy user equipments while implementing coverage enhancement for some users, thereby improving network deployment flexibility.
本发明实施例第一方面提供了一种下行信道加扰方法，该方法包括：A first aspect of the embodiments of the present invention provides a downlink channel scrambling method, where the method includes:
基站判断小区中是否同时存在传输时间间隔绑定TTI Bundling状态的用户设备和传统Legacy状态的用户设备，其中，TTI Bundling状态的用户设备为发送下行数据使用TTIBundling进行覆盖增强的用户设备，Legacy状态的用户设备为发送下行数据不使用TTIBundling进行覆盖增强的用户设备；若同时存在TTI Bundling状态的用户设备和Legacy状态的用户设备，则基站对发送至TTI Bundling状态的用户设备的数据与对发送至Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。The base station determines whether the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both in the cell, and the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement on the downlink data. The user equipment is a user equipment that transmits downlink data without using TTiBundling for coverage enhancement; if both the TTI Bundling user equipment and the legacy state user equipment exist, the base station sends data and pairs to the user equipment sent to the TTI Bundling state to the Legacy. The data of the user equipment of the state is scrambled separately using the scrambling code sequences generated by the initial values of the different scrambling code sequences.
需要说明的是，本发明实施例对发送至Legacy状态的用户设备的数据所使用的扰码序列初始值的处理方式与3GPP TS 36.211保持不变。It should be noted that, in the embodiment of the present invention, the processing method of the initial value of the scrambling code sequence used by the data of the user equipment sent to the legacy state remains unchanged from 3GPP TS 36.211.
本发明实施例中，在网络侧对用户进行了区分，分为不需要进行覆盖增强的Legacy状态的用户设备和需要进行覆盖增强的TTI Bundling状态的用户设备，对这两种用户设备采用不同的扰码序列初始值分别进行加扰。故使用该技术的网络***可以同时兼容legacy用户设备和TTI Bundling用户设备，在实际部署中具有更好的灵活性。In the embodiment of the present invention, the user is differentiated on the network side, and is divided into a user equipment that does not need to perform the coverage enhanced Legacy state and a user equipment that needs to perform the coverage enhancement TTI Bundling state, and the two user equipments are different. The initial values of the scrambling sequence are scrambled separately. Therefore, the network system using this technology can be compatible with legacy user equipment and TTI Bundling user equipment at the same time, and has better flexibility in actual deployment.
结合第一方面，在第一方面的第一种可能的实现方式中，基站向TTI Bundling状态的用户设备发送数据时，对数据包进行多次重复发送，重复发送该数据包时，每次发送所使用的扰码序列初始值相同，即：针对发送至TTI  Bundling状态的用户设备的数据中重复发送的第一数据，每次发送第一数据所使用的扰码序列初始值相同。With reference to the first aspect, in a first possible implementation manner of the first aspect, when the base station sends data to the user equipment in the TTI Bundling state, the data packet is repeatedly sent multiple times, and when the data packet is repeatedly sent, each time the data packet is repeatedly sent. The initial value of the scrambling code sequence used is the same, ie for sending to TTI The first data repeatedly transmitted in the data of the user equipment in the Bundling state is the same as the initial value of the scrambling code sequence used to transmit the first data each time.
需要说明的是，扰码序列初始值用于生成扰码序列，每次发送第一数据使用的扰码序列初始值相同，表示使用的扰码序列相同，说明在重复发送第一数据时，使用的扰码序列与时间参数无关。It should be noted that the initial value of the scrambling code sequence is used to generate a scrambling code sequence, and the initial value of the scrambling code sequence used for transmitting the first data is the same each time, indicating that the scrambling code sequence used is the same, indicating that the first data is repeatedly used. The scrambling sequence is independent of the time parameter.
结合第一方面，或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，首次发送第一数据所使用的扰码序列初始值与当前信道首次发送第一数据所在的时隙号相关，重复发送第一数据所使用的扰码序列初始值与首次发送第一数据所使用的扰码序列初始值相同。With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the initial value of the scrambling code sequence used for transmitting the first data for the first time is sent to the current channel for the first time. The slot number in which the first data is located is related, and the initial value of the scrambling code sequence used for repeatedly transmitting the first data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time.
在此种方式下，首次发送第一数据所使用的扰码序列初始值可以维持与在此时隙发送至Legacy状态的用户设备的数据所使用的扰码序列初始值相同，后续重复发送第一数据时所使用的扰码序列初始值与对应时隙发送至Legacy状态的用户设备的数据所使用的扰码序列初始值不同。In this manner, the initial value of the scrambling code sequence used for transmitting the first data for the first time may be the same as the initial value of the scrambling code sequence used by the data of the user equipment sent to the Legacy state in this time slot, and the first repeated transmission is performed. The initial value of the scrambling code sequence used in the data is different from the initial value of the scrambling code sequence used by the data of the user equipment corresponding to the time slot transmitted to the legacy state.
结合第一方面的第二种可能的实现方式，在第一方面的第三种可能的实现方式中，若发送第一数据的信道为PDCCH信道，则首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000001
cinit为扰码序列初始值，ns为当前PDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000002
为用户设备所在小区的小区ID。In conjunction with the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, if the channel that sends the first data is the PDCCH channel, the initial use of the scrambling code sequence for transmitting the first data for the first time Value can be
Figure PCTCN2016107088-appb-000001
c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current PDCCH channel.
Figure PCTCN2016107088-appb-000002
The cell ID of the cell where the user equipment is located.
结合第一方面的第二种可能的实现方式，在第一方面的第四种可能的实现方式中，若发送第一数据的信道为EPDCCH信道，则首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000003
其中，cinit为扰码序列初始值，ns为当前EPDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000004
为与EPDCCH加扰初始化参数，取值范围0～503。With reference to the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, if the channel that sends the first data is an EPDCCH channel, the initial use of the scrambling code sequence for transmitting the first data for the first time Value can be
Figure PCTCN2016107088-appb-000003
Where c init is the initial value of the scrambling code sequence, and n s is the slot number in which the first EDR channel first transmits the first data.
Figure PCTCN2016107088-appb-000004
To initialize the parameters with the EPDCCH, the value ranges from 0 to 503.
结合第一方面的第二种可能的实现方式，在第一方面的第五种可能的实现方式中，若发送第一数据的信道为PDSCH信道，则首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000005
其中，cinit为扰码序列初始值，q为码字序号，nRNTI为用户设备标识，ns为当前PDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000006
为用户设备所在小区的小区ID。In conjunction with the second possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, if the channel that sends the first data is a PDSCH channel, the initial use of the scrambling code sequence for transmitting the first data for the first time Value can be
Figure PCTCN2016107088-appb-000005
Wherein, c init is the initial value of the scrambling code sequence, q is the codeword sequence number, n RNTI is the user equipment identifier, and n s is the time slot number where the first PDCCH channel first transmits the first data.
Figure PCTCN2016107088-appb-000006
The cell ID of the cell where the user equipment is located.
结合第一方面，或第一方面的第一种可能的实现方式，在第一方面的第六 种可能的实现方式中，首次发送第一数据以及后续重复发送第一数据时使用的扰码序列初始值与时隙号等时间参数无关：首次发送第一数据所使用的扰码序列初始值为根据加扰参数确定的扰码序列初始值，加扰参数不包括当前信道首次发送第一数据所在的时隙号，重复发送第一数据所使用的扰码序列初始值与首次发送第一数据所使用的扰码序列初始值相同。In combination with the first aspect, or the first possible implementation of the first aspect, the sixth aspect in the first aspect In a possible implementation manner, the initial value of the scrambling code sequence used when transmitting the first data for the first time and the subsequent repeated transmission of the first data is independent of time parameters such as the slot number: the initial value of the scrambling code sequence used for transmitting the first data for the first time is The initial value of the scrambling code sequence determined according to the scrambling parameter, the scrambling parameter does not include the slot number in which the first channel is sent by the current channel, the initial value of the scrambling code sequence used to repeatedly transmit the first data, and the first data sent first. The initial value of the scrambling code sequence used is the same.
在此种方式下，每次发送第一数据(即首次发送第一数据与后续重复发送第一数据)所使用的扰码序列初始值与对应时隙发送至Legacy状态的用户设备所使用的扰码序列初始值不同。In this manner, the initial value of the scrambling code sequence used for transmitting the first data (that is, the first data is sent for the first time and the first data is subsequently transmitted) and the interference used by the user equipment sent to the Legacy state in the corresponding time slot. The initial value of the code sequence is different.
结合第一方面的第六种可能的实现方式，在第一方面的第七种可能的实现方式中，若发送第一数据的信道为PDCCH信道，则首次发送第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000007
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000008
为小区的小区ID，cinit为发送第一数据所使用的扰码序列初始值。With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, if the channel that sends the first data is the PDCCH channel, the scrambling code sequence used for the first data is sent. The initial value is based on the formula
Figure PCTCN2016107088-appb-000007
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000008
For the cell ID of the cell, c init is the initial value of the scrambling code sequence used to transmit the first data.
结合第一方面的第六种可能的实现方式，在第一方面的第八种可能的实现方式中，若发送第一数据的信道为EPDCCH信道，则首次发送第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000009
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000010
为与EPDCCH加扰初始化加扰初始化参数，其取值范围为0～503。With reference to the sixth possible implementation manner of the first aspect, in the eighth possible implementation manner of the first aspect, if the channel that sends the first data is an EPDCCH channel, the scrambling code sequence used for transmitting the first data for the first time The initial value is based on the formula
Figure PCTCN2016107088-appb-000009
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000010
The scrambling initialization parameter is initialized with the EPDCCH scrambling, and the value ranges from 0 to 503.
结合第一方面的第六种可能的实现方式，在第一方面的第九种可能的实现方式中，若发送第一数据的信道为PDSCH信道，则首次发送第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000011
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000012
为小区的小区ID，nRNTI为TTI Bundling状态的用户设备标识，q为码字序号，cinit为发送第一数据所使用的扰码序列初始值。With reference to the sixth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, if the channel that sends the first data is a PDSCH channel, the scrambling code sequence used for transmitting the first data for the first time The initial value is based on the formula
Figure PCTCN2016107088-appb-000011
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000012
For the cell ID of the cell, the n RNTI is the user equipment identifier in the TTI Bundling state, q is the codeword sequence number, and c init is the initial value of the scrambling code sequence used to transmit the first data.
结合第一方面的任一种可能的实现方式，在第一方面的第十种可能的实现方式中，基站判断小区中是否同时存在TTI Bundling状态的用户设备和传统Legacy状态的用户设备具体为：基站接收用户设备发送的能力上报消息，该能力上报消息指示用户设备支持下行TTI Bundling；基站接收用户设备发送的信道质量测量值，若信道质量测量值低于信道质量预设值，则基站指示用户设备进入TTI Bundling状态，则基站确定小区中同时存在TTI Bundling状态的用户设备和传统Legacy状态的用户设备。With reference to any possible implementation of the first aspect, in a tenth possible implementation manner of the first aspect, the determining, by the base station, whether the TTI Bundling state user equipment and the traditional Legacy state user equipment are: The base station receives the capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports the downlink TTI Bundling; the base station receives the channel quality measurement value sent by the user equipment, and if the channel quality measurement value is lower than the channel quality preset value, the base station indicates the user When the device enters the TTI Bundling state, the base station determines that the user equipment in the TTI Bundling state and the user equipment in the legacy Legacy state exist in the cell.
小区中的所有用户设备都向基站上报消息指示是否具有下行TTI  Bundling能力，由基站根据当前的信道质量指示用户设备进入TTI Bundling状态，使小区中同时存在TTI Bundling状态的用户设备和Legacy状态的用户设备，从而能够对这两种用户分别进行加扰，同时兼容这两类用户设备。All user equipments in the cell report a message to the base station indicating whether there is a downlink TTI. The Bundling capability indicates that the user equipment enters the TTI Bundling state according to the current channel quality, so that the user equipment in the TTI Bundling state and the user equipment in the Legacy state exist in the cell, so that the two users can be separately scrambled and compatible. These two types of user equipment.
结合第一方面的任一种可能的实现方式，在第一方面的第十一种可能的实现方式中，若小区中只存在TTI Bundling状态的用户设备，则基站对发送至TTI Bundling状态的用户设备的数据进行加扰，数据中包括重复发送的第二数据，每次发送第二数据所使用的扰码序列初始值相同。With reference to any possible implementation of the first aspect, in the eleventh possible implementation manner of the first aspect, if the user equipment in the TTI Bundling state exists in the cell, the base station sends the user to the TTI Bundling state. The data of the device is scrambled, and the data includes the second data repeatedly transmitted, and the initial value of the scrambling code sequence used each time the second data is transmitted is the same.
其中，小区中只存在TTI Bundling状态的用户设备的场景可以是独立部署的Standalone基站。The scenario in which the user equipment in the TTI Bundling state exists in the cell may be an independently deployed Standalone base station.
第二方面，本发明实施例提供了一种下行信道解扰方法，该方法包括：In a second aspect, an embodiment of the present invention provides a downlink channel descrambling method, where the method includes:
用户设备向基站发送能力上报消息，能力上报消息指示用户设备支持下行TTI Bundling；用户设备接收基站发送的进入TTI Bundling状态的指示消息，根据指示消息进入TTI Bundling状态；用户设备接收基站发送的多个第一数据，对多个第一数据进行同相和正交分量IQ数据合并；用户设备确定TTI Bundling对应的扰码序列，使用TTI Bundling对应的扰码序列解扰合并后的第一数据。The user equipment sends a capability report message to the base station, and the capability report message indicates that the user equipment supports the downlink TTI Bundling; the user equipment receives the indication message that the base station sends the TTI Bundling state, and enters the TTI Bundling state according to the indication message; the user equipment receives multiple The first data is used to perform in-phase and quadrature component IQ data combining on the plurality of first data; the user equipment determines the scrambling code sequence corresponding to the TTI Bundling, and descrambles the combined first data by using the scrambling code sequence corresponding to the TTI Bundling.
结合第二方面，在第二方面的第一种实现方式中，该方法还包括：用户设备向基站发送信道质量测量值，该信道质量测量值用于基站根据该信道质量测量值确定是否指示用户设备进入TTI Bundling状态。With reference to the second aspect, in a first implementation manner of the second aspect, the method further includes: the user equipment sends a channel quality measurement value to the base station, where the channel quality measurement value is used by the base station to determine whether to indicate the user according to the channel quality measurement value. The device enters the TTI Bundling state.
本发明实施例中，需要进行覆盖增强的TTI Bundling状态的用户设备，对这两种用户设备采用不同的扰码序列初始值分别进行加扰。故使用该技术的网络***可以同时兼容legacy用户设备和TTI Bundling用户设备，在实际部署中具有更好的灵活性。In the embodiment of the present invention, the user equipment in the enhanced TTI Bundling state needs to be performed, and the initial values of the different scrambling code sequences are separately scrambled for the two user equipments. Therefore, the network system using this technology can be compatible with legacy user equipment and TTI Bundling user equipment at the same time, and has better flexibility in actual deployment.
本发明实施例中，小区中的用户设备向基站上报消息指示是否具有下行TTI Bundling能力，由基站根据当前的信道质量指示用户设备进入TTI Bundling状态，在基站对小区中的legacy用户设备和TTI Bundling用户设备分别加扰后，TTI Bundling状态的用户设备能够进行解扰，因而，本发明的技术方案能够同时兼容这两类用户设备，提升了网络部署灵活性。 In the embodiment of the present invention, the user equipment in the cell reports to the base station whether the message has the downlink TTI Bundling capability, and the base station indicates that the user equipment enters the TTI Bundling state according to the current channel quality, and the legacy user equipment and the TTI Bundling in the base station to the cell. After the user equipment is separately scrambled, the user equipment in the TTI Bundling state can perform descrambling. Therefore, the technical solution of the present invention can be compatible with both types of user equipments at the same time, thereby improving network deployment flexibility.
本发明实施例提供了一种下行信道加扰装置，具体实现对应于上述第一方面提供的下行信道加扰方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件程序实现。硬件和软件包括一个或多个与上述功能相对应的单元模块，所述单元模块可以是软件和/或硬件。The embodiment of the invention provides a downlink channel scrambling device, which implements the function corresponding to the downlink channel scrambling method provided by the above first aspect. The functions may be implemented by hardware or by executing corresponding software programs through hardware. The hardware and software include one or more unit modules corresponding to the functions described above, which may be software and/or hardware.
第三方面，一种可能的设计中，所述下行信道加扰装置从功能模块上包括判断单元和加扰单元，其中：In a third aspect, in a possible design, the downlink channel scrambling device includes a judging unit and a scrambling unit from the function module, where:
判断单元，用于判断小区中是否同时存在传输时间间隔绑定TTI Bundling状态的用户设备和传统Legacy状态的用户设备，其中，TTI Bundling状态的用户设备为发送下行数据使用TTIBundling进行覆盖增强的用户设备，Legacy状态的用户设备为发送下行数据不使用TTIBundling进行覆盖增强的用户设备；The determining unit is configured to determine whether the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both in the cell, where the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement. The user equipment in the legacy state is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement;
加扰单元，用于当确定同时存在TTI Bundling状态的用户设备和Legacy状态的用户设备时，对发送至TTI Bundling状态的用户设备的数据与对发送至Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。The scrambling unit is configured to use different interference on the data of the user equipment sent to the TTI Bundling state and the data of the user equipment sent to the Legacy state when determining that the user equipment of the TTI Bundling state and the user equipment of the Legacy state exist simultaneously The scrambling code sequence generated by the initial value of the code sequence is scrambled separately.
结合第三方面，在第三方面的第一种可能的实现方式中，基站发送至TTI Bundling状态的用户设备的数据中包括重复发送的第一数据，加扰单元加扰每个所述第一数据所使用的扰码序列初始值相同。With reference to the third aspect, in a first possible implementation manner of the third aspect, the data that is sent by the base station to the user equipment in the TTI Bundling state includes the first data that is repeatedly sent, and the scrambling unit scrambles each of the first The initial value of the scrambling code sequence used by the data is the same.
结合第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，首次发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值与当前信道首次发送第一数据所在的时隙号相关，重复发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值与首次发送第一数据所使用的扰码序列初始值相同。With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time The initial value of the scrambling code sequence used by the scrambling unit to scramble the first data and the initial value of the scrambling code sequence used for transmitting the first data for the first time when the first channel transmits the first data. the same.
结合第三方面的第一种可能的实现方式，在第三方面的第三种可能的实现方式中，首次发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值为根据加扰参数确定的扰码序列初始值，加扰参数不包括当前信道首次发送第一数据所在的时隙号，重复发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值与首次发送第一数据所使用的扰码序列初始值相同。With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time The initial value of the scrambling code sequence determined according to the scrambling parameter, the scrambling parameter does not include the slot number in which the first channel is sent by the current channel, and the scrambling sequence used by the scrambling unit to scramble the first data when the first data is repeatedly transmitted. The initial value is the same as the initial value of the scrambling code sequence used to transmit the first data for the first time.
结合第三方面的第三种可能的实现方式，在第三方面的第四种可能的实现 方式中，若发送第一数据的信道为PDCCH信道，则首次发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000013
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000014
为小区的小区ID，cinit为发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值。With the third possible implementation of the third aspect, in a fourth possible implementation manner of the third aspect, if the channel that sends the first data is the PDCCH channel, the scrambling unit scrambles when the first data is sent for the first time. The initial value of the scrambling code sequence used by the first data is according to the formula
Figure PCTCN2016107088-appb-000013
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000014
For the cell ID of the cell, c init is the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when transmitting the first data.
结合第三方面的第三种可能的实现方式，在第三方面的第五种可能的实现方式中，若发送第一数据的信道为EPDCCH信道，则首次发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000015
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000016
为与EPDCCH加扰初始化加扰初始化参数，取值范围0～503，cinit为发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值。With the third possible implementation of the third aspect, in a fifth possible implementation manner of the third aspect, if the channel that sends the first data is an EPDCCH channel, the scrambling unit scrambles when the first data is sent for the first time. The initial value of the scrambling code sequence used by the first data is according to the formula
Figure PCTCN2016107088-appb-000015
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000016
The scrambling initialization parameter is initialized with the EPDCCH scrambling, in a range of 0 to 503, and c init is an initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is transmitted.
结合第三方面的第三种可能的实现方式，在第三方面的第六种可能的实现方式中，若发送第一数据的信道为PDSCH信道，则首次发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000017
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000018
为小区的小区ID，nRNTI为TTI Bundling状态的用户设备标识，q为码字序号，cinit为发送第一数据时加扰单元加扰第一数据所使用的扰码序列初始值。With the third possible implementation of the third aspect, in a sixth possible implementation manner of the third aspect, if the channel that sends the first data is a PDSCH channel, the scrambling unit scrambles when the first data is sent for the first time. The initial value of the scrambling code sequence used by the first data is according to the formula
Figure PCTCN2016107088-appb-000017
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000018
For the cell ID of the cell, the n RNTI is the user equipment identifier in the TTI Bundling state, q is the codeword sequence number, and c init is the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is transmitted.
结合第三方面的任一种可能的实现方式，在第三方面的第七种可能的实现方式中，该装置还包括：In conjunction with any of the possible implementations of the third aspect, in a seventh possible implementation of the third aspect, the apparatus further includes:
接收单元，用于接收用户设备发送的能力上报消息，能力上报消息指示用户设备支持下行TTI Bundling；所述接收单元，还用于接收用户设备发送的信道质量测量值；所述判断单元，还用于判断信道质量测量值是否低于信道质量预设值；a receiving unit, configured to receive a capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports the downlink TTI Bundling; the receiving unit is further configured to receive a channel quality measurement value sent by the user equipment; Determining whether the channel quality measurement value is lower than a channel quality preset value;
该装置还包括：发送单元，用于当确定信道质量测量值低于信道质量预设值时，则发送指示消息指示用户设备进入TTI Bundling状态；判断单元，具体用于当用户设备进入TTI Bundling状态时，确定小区中同时存在TTI Bundling状态的用户设备和传统Legacy状态的用户设备。The device further includes: a sending unit, configured to: when the determined channel quality measurement value is lower than the channel quality preset value, send an indication message to indicate that the user equipment enters a TTI Bundling state; and the determining unit is specifically configured to: when the user equipment enters a TTI Bundling state The user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are determined in the cell.
结合第三方面的任一种可能的实现方式，在第三方面的第八种可能的实现方式中，加扰单元，还用于当确定小区中只存在TTI Bundling状态的用户设备时，对发送至TTI Bundling状态的用户设备的数据进行加扰，数据中包括重复 发送的第二数据，每次发送第二数据时加扰单元所使用的扰码序列初始值相同。With reference to any possible implementation of the third aspect, in an eighth possible implementation manner of the third aspect, the scrambling unit is further configured to: when determining that only the user equipment in the TTI Bundling state exists in the cell, The data of the user equipment to the TTI Bundling state is scrambled, and the data includes repetition The transmitted second data has the same initial value of the scrambling code sequence used by the scrambling unit each time the second data is transmitted.
第四方面，一种可能的设计中，所述下行信道加扰装置为基站，从硬件结构上来说，基站包括：In a fourth aspect, in a possible design, the downlink channel scrambling device is a base station, and the hardware base includes:
相互连接的收发器、处理器及存储器；存储器用于存储程序代码，处理器调用存储器中的程序代码，以执行所述第一方面的下行信道加扰方法中的全部或部分方法步骤。An interconnected transceiver, processor and memory; a memory for storing program code, the processor invoking program code in the memory to perform all or part of the method steps of the downlink channel scrambling method of the first aspect.
本发明实施例提供了一种下行信道解扰装置，具体实现对应于上述第二方面提供的下行信道解扰方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件程序实现。硬件和软件包括一个或多个与上述功能相对应的单元模块，所述单元模块可以是软件和/或硬件。The embodiment of the invention provides a downlink channel descrambling device, which specifically implements the function corresponding to the downlink channel descrambling method provided by the second aspect. The functions may be implemented by hardware or by executing corresponding software programs through hardware. The hardware and software include one or more unit modules corresponding to the functions described above, which may be software and/or hardware.
第五方面，一种可能的设计中，所述下行信道加扰装置从功能模块上包括：In a fifth aspect, in a possible design, the downlink channel scrambling device includes:
发送单元，用于向基站发送能力上报消息，能力上报消息指示用户设备支持下行TTI Bundling；接收单元，用于接收基站发送的进入TTI Bundling状态的指示消息；状态切换单元，用于根据指示消息进入TTI Bundling状态；所述接收单元，还用于接收基站发送的多个第一数据；IQ合并单元，用于对多个第一数据进行同相和正交分量IQ数据合并；解扰单元，用于确定TTI Bundling对应的扰码序列，使用TTI Bundling对应的扰码序列解扰合并后的第一数据。a sending unit, configured to send a capability report message to the base station, where the capability report message indicates that the user equipment supports the downlink TTI Bundling; the receiving unit is configured to receive the indication message that the base station sends the TTI Bundling state, and the state switching unit is configured to enter according to the indication message. a receiving unit, configured to receive a plurality of first data sent by the base station, an IQ combining unit, configured to perform in-phase and quadrature component IQ data combining the plurality of first data, and a descrambling unit, configured to: The scrambling code sequence corresponding to the TTI Bundling is determined, and the combined first data is descrambled using the scrambling code sequence corresponding to the TTI Bundling.
第六方面，一种可能的设计中，所述下行信道解扰装置为用户设备，从硬件结构上来说，用户设备包括：In a sixth aspect, in a possible design, the downlink channel descrambling device is a user equipment, and the user equipment includes:
相互连接的收发器、处理器及存储器；存储器用于存储程序代码，处理器调用存储器中的程序代码，以执行第二方面的下行信道解扰方法中的全部或部分方法步骤。An interconnected transceiver, processor and memory; a memory for storing program code, the processor invoking program code in the memory to perform all or part of the method steps of the second aspect of the downlink channel descrambling method.
第七方面，本发明实施例还提供一种计算机存储介质，该介质存储有应用程序，该程序执行时包括上述第一方面的下行信道加扰方法全部或部分步骤。In a seventh aspect, the embodiment of the present invention further provides a computer storage medium, where the medium stores an application program, and the program includes all or part of the steps of the downlink channel scrambling method of the first aspect.
从以上技术方案可以看出，本发明实施例的方案具有如下有益效果：It can be seen from the above technical solutions that the solution of the embodiment of the present invention has the following beneficial effects:
本发明实施例中，基站先确定小区中是否同时存在需要进行覆盖增强的TTI Bundling状态的用户设备和不需要进行覆盖增强的传统Legacy状态的用 户设备，若同时存在，则对发送至TTI Bundling状态的用户设备的数据与对发送至Legacy状态的用户设备的数据分别进行加扰。本发明实施例在网络侧调度时，对用户设备进行了区分，对两种不同状态的用户设备采用不同的加扰方式，故使用该技术的网络***可以同时兼容legacy用户设备和TTI Bundling用户设备，在实际部署中具有更好的灵活性。In the embodiment of the present invention, the base station first determines whether the user equipment in the TTI Bundling state in which the coverage enhancement needs to be simultaneously existed in the cell and the traditional legacy state that does not need to perform coverage enhancement. If the user equipment exists at the same time, the data of the user equipment sent to the TTI Bundling state and the data of the user equipment sent to the Legacy state are respectively scrambled. In the embodiment of the present invention, when the network side is scheduled, the user equipment is distinguished, and the user equipments of the two different states are used in different scrambling modes. Therefore, the network system using the technology can be compatible with the legacy user equipment and the TTI Bundling user equipment. , with better flexibility in actual deployment.
附图说明DRAWINGS
图1为本发明实施例无线通信***的示意图；1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention;
图2为本发明实施例LTE通信***中包括的模块示意图；2 is a schematic diagram of modules included in an LTE communication system according to an embodiment of the present invention;
图3为本发明实施例发送端物理链路层信息处理过程示意图；3 is a schematic diagram of a process of processing physical link layer information at a transmitting end according to an embodiment of the present invention;
图4为本发明实施例接收端物理链路层信息处理过程示意图；4 is a schematic diagram of a process of processing physical link layer information at a receiving end according to an embodiment of the present invention;
图5为本发明实施例下行信道加扰方法的一种流程图；FIG. 5 is a flowchart of a downlink channel scrambling method according to an embodiment of the present invention;
图6为本发明实施例中基站与用户设备间进行状态切换的一种信息交互图；FIG. 6 is an information interaction diagram of performing state switching between a base station and a user equipment according to an embodiment of the present invention;
图7为本发明实施例中基站使用下行TTI Bundling技术发送数据时的帧结构示意图；FIG. 7 is a schematic structural diagram of a frame when a base station sends data by using a downlink TTI Bundling technology according to an embodiment of the present invention;
图8为本发明实施例中TTI Bundling用户设备侧进行数据合并的示意图；8 is a schematic diagram of data merging on a TTI Bundling user equipment side according to an embodiment of the present invention;
图9为本发明实施例中基站对Legacy状态和TTI Bundling状态用户设备分别进行加扰的过程示意图；FIG. 9 is a schematic diagram of a process for a base station to perform scrambling on a Legacy state and a TTI Bundling state user equipment according to an embodiment of the present invention;
图10为本发明实施例中下行信道加扰装置的功能模块结构示意图；10 is a schematic structural diagram of functional modules of a downlink channel scrambling apparatus according to an embodiment of the present invention;
图11为本发明实施例中下行信道解扰装置的功能模块结构示意图；11 is a schematic structural diagram of functional modules of a downlink channel descrambling apparatus according to an embodiment of the present invention;
图12为本发明实施例中基站和用户设备的硬件结构示意图。FIG. 12 is a schematic structural diagram of hardware of a base station and a user equipment according to an embodiment of the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments.
本发明实施例中的技术方案可以应用于各种无线通信***，诸如码分多址(CDMA)网络、时分多址(TDMA)网络、频分多址(FDMA)网络、正交 FDMA(OFDMA)网络、单载波FDMA(SC-FDMA)网络等。术语“网络”和“***”可互换地使用。CDMA网络可实现诸如通用地面无线电接入(UTRA)、cdma2000等无线电技术。UTRA包括宽带CDMA(W-CDMA)和其他CDMA变体。cdma2000涵盖IS-2000、IS-95和IS-856标准。TDMA网络可实现诸如全球移动通信***(GSM)之类的无线电技术。OFDMA网络可实现诸如演进型UTRA(E-UTRA)、超移动宽带(UMB)、IEEE 802.11(Wi-Fi)、IEEE 802.16(WiMAX)、IEEE 802.20、Flash-OFDM等无线电技术。UTRA和E-UTRA是通用移动电信***(UMTS)的部分。3GPP长期演进(LTE)和高级LTE(LTE-A)是使用E-UTRA的新UMTS版本。UTRA、E-UTRA、UMTS、LTE、LTE-A和GSM在来自名为“第3代伙伴项目”(3GPP)的组织的文献中描述。cdma2000和UMB在来自名为“第3代伙伴项目2”(3GPP2)的组织的文献中描述。本文所描述的技术可被用于以上所提及的无线网络和无线电技术以及其他无线网络和无线电技术。为了清楚起见，以下针对LTE来描述这些技术的某些方面，并且在以下大部分描述中使用LTE术语。The technical solution in the embodiments of the present invention can be applied to various wireless communication systems, such as a code division multiple access (CDMA) network, a time division multiple access (TDMA) network, a frequency division multiple access (FDMA) network, and orthogonality. FDMA (OFDMA) network, single carrier FDMA (SC-FDMA) network, and the like. The terms "network" and "system" are used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (W-CDMA) and other CDMA variants. Cdma2000 covers the IS-2000, IS-95, and IS-856 standards. A TDMA network can implement a radio technology such as the Global System for Mobile Communications (GSM). The OFDMA network may implement radio technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and the like. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new UMTS versions that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). Cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used in the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, certain aspects of the techniques are described below for LTE, and LTE terminology is used in much of the description below.
本发明实施例以应用于LTE宽带***为背景对方案进行详细介绍。The embodiment of the present invention introduces the scheme in detail in the context of applying to the LTE broadband system.
本发明实施例所涉及到的用户设备(User Equipment，简称UE)可以包括具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户终端设备，移动台(Mobile station,简称MS)，终端(terminal)，终端设备(Terminal Equipment)等等。User Equipment (UE) related to the embodiments of the present invention may include a handheld device having a wireless communication function, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, and various forms. User terminal equipment, mobile station (MS), terminal, terminal equipment, and the like.
图1示出的是无线通信***的示意图，其包括基站(在LTE中称为演进NodeB，即eNB)和多个用户设备(或用户终端)，该基站下可以有多个小区，也可以只有一个小区。1 is a schematic diagram of a wireless communication system, which includes a base station (referred to as an evolved NodeB in LTE, ie, an eNB) and a plurality of user equipments (or user terminals), which may have multiple cells or only a community.
本发明实施例适用于下行技术，因此，在本发明实施例中，基站为发送端，用户设备为接收端。The embodiment of the present invention is applicable to the downlink technology. Therefore, in the embodiment of the present invention, the base station is a transmitting end, and the user equipment is a receiving end.
在LTE通信***中，一般都包含信源、信道、新宿三个模块，如图2所示。In an LTE communication system, three modules of a source, a channel, and a Shinjuku are generally included, as shown in FIG. 2 .
其中，信源包含协议栈处理和与信道适配的物理层链路处理；协议栈处理部分包括PDCP组包/分段，IP数据头添加等，物理层链路处理包括CRC，编 码调制等。信道即为无线通信***中的传输媒介，受到自然环境和终端移动的影响，需要抵抗多径干扰，多普勒频移等不利条件的影响；信宿即为信源的接收端，处理过程为信源处理和信道条件估计等综合影响的反过程，即不仅需要实现信源的反处理过程，还需要尽量平衡信道的影响。The source includes protocol stack processing and physical layer link processing with channel adaptation; the protocol stack processing part includes PDCP group packet/segmentation, IP data header addition, etc., physical layer link processing includes CRC, Code modulation, etc. The channel is the transmission medium in the wireless communication system. It is affected by the natural environment and the movement of the terminal. It needs to resist the adverse conditions such as multipath interference and Doppler frequency shift. The sink is the receiving end of the source, and the processing is the letter. The inverse of the combined effects of source processing and channel condition estimation, that is, not only the reverse processing of the source but also the influence of the channel should be balanced as much as possible.
以PDCCH信道为例，根据LTE协议，不考虑信道的影响，其物理层链路处理的具体过程如图3所示。Taking the PDCCH channel as an example, according to the LTE protocol, the specific process of the physical layer link processing is shown in FIG. 3 regardless of the influence of the channel.
PDCCH的物理层链路处理按照数据格式又分为bit级处理(0/1二进制数据)和符号级/IQ数据处理。其中，bit级处理包括对下行控制信息(英文：Downlink Control Information，简称：DCI)原始数据进行循环冗余校验(英文：Cyclic Redundancy Check，简称：CRC)，再进行卷积编码，再进行速率匹配，再对多个用户设备的速率匹配后的bit数据进行复用，之后进行加扰。加扰之后进行调制，产生调制符号。之后的符号级/IQ数据处理包括：对调制符号进行层映射，对层映射之后的数据进行预编码，再将数据映射到不同的天线端口上，在各个天线端口上进行资源映射，生成正交频分复用(英文：Orthogonal Frequency Division Multiplexing，简称：OFDM)符号，再进行逆变换IFFT，再将OFDM符号发射出去。The physical layer link processing of the PDCCH is further divided into bit level processing (0/1 binary data) and symbol level/IQ data processing according to the data format. The bit-level processing includes performing cyclic redundancy check (English: Cyclic Redundancy Check, CRC) on the downlink control information (English: Downlink Control Information, DC for short), and then performing convolutional coding, and then performing the rate. Matching, and then multiplexing the bit data of the rate matching of multiple user equipments, and then performing scrambling. Modulation is performed after scrambling to generate modulation symbols. Subsequent symbol level/IQ data processing includes: layer mapping the modulation symbols, precoding the data after the layer mapping, mapping the data to different antenna ports, performing resource mapping on each antenna port, and generating orthogonality. Frequency division multiplexing (English: Orthogonal Frequency Division Multiplexing, OFDM for short), then inverse transform IFFT, and then OFDM symbols are transmitted.
其中IQ数据是调制模块/星座点映射模块将二进制数据转换/映射后获得，3GPP TS 36.211中列举了LTE协议中关于不同调制方式下星座点映射方案，其中PDCCH信道固定采用QPSK调制方式，QPSK调制所采用的参数如表1所示。 The IQ data is obtained by converting/mapping the binary data by the modulation module/constellation point mapping module. The constellation point mapping scheme for different modulation modes in the LTE protocol is listed in 3GPP TS 36.211, wherein the PDCCH channel is fixed by QPSK modulation, QPSK modulation. The parameters used are shown in Table 1.
表1Table 1
Figure PCTCN2016107088-appb-000019
Figure PCTCN2016107088-appb-000019
相应的，不考虑信道的影响，接收端的PDCCH物理层链路处理过程如图4所示。PDCCH的物理层链路处理的过程与图3所示的发送端的PDCCH物理层链路处理过程相反。同样，按照数据格式分为符号级/IQ数据处理和bit级处理(0/1二进制数据)。其中，符号级/IQ数据处理包括对接收到的空口数据进行快速傅里叶变换(FFT)变换，再进行解资源映射，解层映射和预编码，解调得到bit级数据。bit级处理包括对解调后的数据进行解扰，再进行解速率匹配，译码，解CRC得到原始的DCI数据。Correspondingly, regardless of the influence of the channel, the PDCCH physical layer link processing procedure at the receiving end is as shown in FIG. 4 . The process of physical layer link processing of the PDCCH is opposite to the PDCCH physical layer link processing procedure of the transmitting end shown in FIG. Similarly, according to the data format, it is divided into symbol level/IQ data processing and bit level processing (0/1 binary data). The symbol level/IQ data processing includes performing fast Fourier transform (FFT) transform on the received air interface data, performing solution resource mapping, layer layer mapping and precoding, and demodulating to obtain bit level data. The bit level processing includes descrambling the demodulated data, performing de-rate matching, decoding, and decoding the CRC to obtain the original DCI data.
在下行传输过程中，为了对信号进行覆盖增强，采用重复发送的技术，即TTI bundling技术。In the downlink transmission process, in order to enhance the coverage of the signal, a technique of repeated transmission, that is, TTI bundling technology is adopted.
TTI Bundling技术是发送端和接收端约定周期T以及重复次数N，该周期的真正起始点可能是满足如下公式的时刻：
Figure PCTCN2016107088-appb-000020
也可能是个滑动时间窗(比如，起始位置可能在滑动窗内任一个子帧)，即满足如下公式的时刻：
Figure PCTCN2016107088-appb-000021
其中α为滑动窗范围，取值范围0～(T-1)；也可能是接收端通过盲检信号存在性得到(在发送端配置的起始位置后的第一个有效下行子帧为真正起始点)，在该周期内，发送端对需要增强的数据进行多次重复发送，接收端在周期内，根据重复次数进行数据的能量合并，即：将一个数据包在连续多个TTI资源上重复进行传输，接收端将多个TTI资源上的数据合并达到增强覆盖的目的。其中，一个数据包进行重复多次发送的相对总时间长度为一个周期。The TTI Bundling technology is a protocol T and a repetition number N of the transmitting end and the receiving end. The true starting point of the period may be the moment that satisfies the following formula:
Figure PCTCN2016107088-appb-000020
It may also be a sliding time window (for example, the starting position may be any sub-frame in the sliding window), ie the moment that satisfies the following formula:
Figure PCTCN2016107088-appb-000021
Where α is the sliding window range, and the value ranges from 0 to (T-1); it may also be that the receiving end obtains the presence of the blind detection signal (the first valid downlink subframe after the start position configured at the transmitting end is true) Starting point), in the period, the transmitting end repeatedly transmits the data to be enhanced, and the receiving end performs energy combining of the data according to the number of repetitions in the period, that is, one data packet is continuously on multiple TTI resources. The transmission is repeated, and the receiving end combines the data on multiple TTI resources to achieve the purpose of enhanced coverage. The relative total length of time during which a data packet is repeatedly transmitted multiple times is one cycle.
具体的，下行的TTI Bundling(或Repetition，下同)是对下行的连续有 效TTI进行绑定，将连续绑定的TTI分配给同一用户设备，这样可以提高数据解码成功的概率，提高LTE的下行覆盖范围，代价是增加了一些时间延迟。有效TTI是指可以进行下行数据传输的TTI，不包括上行TTI，没有占用信道的TTI等。Specifically, the downstream TTI Bundling (or Repetition, the same below) is continuous to the downlink. The TTI is bound to the TTI and the continuously bound TTI is allocated to the same user equipment. This improves the probability of successful data decoding and improves the downlink coverage of LTE. The cost is increased by some time delay. The effective TTI refers to a TTI that can perform downlink data transmission, and does not include an uplink TTI, a TTI that does not occupy a channel, and the like.
LTE R13标准中的eMTC中使用了类似TTI Bundling技术进行覆盖增强，即通过发送端重复发送，接收端多次合并进行下行覆盖增强。而eMTC在CAT0基础上，进一步降低成本，降低带宽至1.4MHz，是应用于LTE下的窄带***，不是应用于宽带***，且eMTC使用TTI bundling实现下行覆盖增强时，不再支持PDCCH，而是采用MPDCCH，从而不兼容传统legacy终端，例如，不再兼容同时工作在授权频点和非授权频点的LAA终端，其中，授权频点负责接入和控制信道传输，非授权频点进行数据传输。In the eMTC of the LTE R13 standard, the TTI Bundling technology is used for coverage enhancement, that is, the transmission is repeatedly transmitted by the transmitting end, and the receiving end is combined for multiple times to perform downlink coverage enhancement. On the basis of CAT0, eMTC further reduces the cost and reduces the bandwidth to 1.4MHz. It is a narrowband system applied to LTE. It is not applied to broadband systems. When eMTC uses TTI bundling to implement downlink coverage enhancement, it does not support PDCCH. The MPDCCH is adopted, so that it is not compatible with the legacy legacy terminal. For example, it is no longer compatible with LAA terminals that operate at both the authorized frequency and the unlicensed frequency. The authorized frequency is responsible for access and control channel transmission, and the unlicensed frequency is used for data transmission. .
本发明实施例通过对PDCCH/EPDCCH和PDSCH信道分别引入一种新的加扰方案，不仅可以使PDCCH/EPDCCH或PDSCH信道数据可以进行IQ数据合并，并可以前向支持LAA终端。By introducing a new scrambling scheme for the PDCCH/EPDCCH and the PDSCH channel, the PDCCH/EPDCCH or PDSCH channel data can be combined with the IQ data, and the LAA terminal can be supported in the past.
下面结合图5对本发明实施例的下行信道加扰方法进行详细介绍。The downlink channel scrambling method of the embodiment of the present invention is described in detail below with reference to FIG.
501、基站判断小区中是否同时存在TTI Bundling状态的用户设备和传统Legacy状态的用户设备；501. The base station determines whether the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both in the cell;
需要说明的是，本发明实施例中的TTI Bundling状态的用户设备为基站发送下行数据时使用TTI Bundling进行覆盖增强的用户设备，也可以称之为TTI Bundling用户，Legacy状态的用户设备为基站发送下行数据不使用TTI Bundling进行覆盖增强的用户设备，也可以称之为Legacy用户。It should be noted that the user equipment in the TTI Bundling state in the embodiment of the present invention is a user equipment that uses TTI Bundling for coverage enhancement when the base station sends downlink data, and may also be called a TTI Bundling user, and the user equipment in the legacy state is sent by the base station. The downlink data does not use TTI Bundling for coverage enhanced user equipment, and can also be called Legacy user.
基站对应的一个小区中，有些用户设备可以根据需要由legacy状态进入TTI Bundling状态，一般来说，当用户设备的接收信号不好时，例如处于小区边缘时，可以由Legacy状态进入TTI Bundling状态进行覆盖增强。In a cell corresponding to the base station, some user equipments can enter the TTI Bundling state by the legacy state as needed. Generally, when the receiving signal of the user equipment is not good, for example, at the cell edge, the Legacy state can be entered into the TTI Bundling state. Coverage enhancement.
需要说明的是，由于***中用户是移动的，或者说信道环境是变化的，所以用户设备的Legacy状态和TTI bundling状态是可以随时切换的，当用户的通信信号质量不需要增强时，该用户设备为Legacy状态，否则为TTI bundling状态。 It should be noted that, because the user in the system is mobile, or the channel environment is changed, the Legacy state and the TTI bundling state of the user equipment can be switched at any time. When the quality of the communication signal of the user does not need to be enhanced, the user The device is in the Legacy state, otherwise it is in the TTI bundling state.
具体的，小区中的用户设备进入TTI Bundling状态的具体过程如图6所示：Specifically, the specific process of the user equipment in the cell entering the TTI Bundling state is as shown in FIG. 6:
601、用户设备向基站发送能力上报消息，该能力上报消息用于向基站上报该用户设备支持下行TTI Bundling，即具备下行TTI Bundling能力。601. The user equipment sends a capability report message to the base station, where the capability report message is used to report that the user equipment supports the downlink TTI Bundling, that is, the downlink TTI Bundling capability.
基站只会对具有TTI Bundling能力的用户设备进行覆盖增强，对不具备TTI Bundling能力的用户设备不进行覆盖增强。The base station only enhances coverage for user equipments with TTI Bundling capability, and does not enhance coverage for user equipments that do not have TTI Bundling capability.
其中，具有TTI Bundling能力的用户设备需要具有缓存能力，以能够合并至少两个子帧的数据。Among them, the user equipment with TTI Bundling capability needs to have a buffering capability to be able to combine data of at least two subframes.
602、用户设备对下行信道质量进行测量；602. The user equipment measures downlink channel quality.
用户设备周期性的对下行信道质量进行测量，具体测量的方式包括下行参考信号接收功率(英文：Reference Signal Receiving Power，简称：RSRP)测量，和/或信号干扰噪声比(英文：signal to interference plus noise ratio，简称SINR)。The user equipment periodically measures the downlink channel quality, and the specific measurement manner includes downlink reference signal receiving power (English: Reference Signal Receiving Power, referred to as: RSRP) measurement, and/or signal interference noise ratio (English: signal to interference plus Noise ratio (SINR).
603、用户设备将信道质量测量值发送到基站；603. The user equipment sends the channel quality measurement value to the base station.
用户设备周期性的对下行信道质量进行测量，并将测量结果(信道质量测量值)周期性或者触发性的上报给基站。The user equipment periodically measures the downlink channel quality, and reports the measurement result (channel quality measurement value) to the base station periodically or triggeringly.
604、基站根据信道质量测量值进行判断，若信道质量测量值低于信道质量预设值，则指示该用户设备进入TTI Bundling状态。604. The base station determines, according to the channel quality measurement value, if the channel quality measurement value is lower than the channel quality preset value, indicating that the user equipment enters a TTI Bundling state.
基站在接收到用户终端的上报结果后，判断上报的信道质量测量值是否低于***预设的信道质量预设值，若低于，则表示该用户设备的下行信道质量较差，需要进行覆盖增强，因此，基站向用户设备发送指示消息指示该用户设备由Legacy状态进入TTI Bundling状态，其中，指示消息可以为DCI 1A消息，基站可以通过DCI 1A消息通知用户设备进入TTI Bundling状态，也可以是高层控制单元通知用户设备进入TTI Bundling状态。After receiving the report result of the user terminal, the base station determines whether the reported channel quality measurement value is lower than a preset channel quality preset value of the system. If the base station is lower, it indicates that the downlink channel quality of the user equipment is poor and needs to be covered. Therefore, the base station sends an indication message to the user equipment to indicate that the user equipment enters the TTI Bundling state by the Legacy state, where the indication message may be a DCI 1A message, and the base station may notify the user equipment to enter the TTI Bundling state through the DCI 1A message, or may be The high-level control unit notifies the user equipment to enter the TTI Bundling state.
其中，具体的，若以RSRP进行信道质量测量，在2T2R(即：下行网络侧2根发送天线，终端侧2根接收天线)，20MHz带宽，城市微小区(英文：urban micro-cell，简称：UMi)非直视径(英文：non-line of sight，简称：NLOS)模型下，则***预设的信道质量预设值可以为：-100dBm，即当用户设备上报的测量结果低于-100dBm时，则表示该用户终端需要进行覆盖增强；若以SINR 进行信道质量测量，则***预设的信道质量预设值可以为：-5dB，即当用户设备上报的测量结果低于-5dB时，则表示该用户终端需要进行覆盖增强。Specifically, if the channel quality measurement is performed by RSRP, in 2T2R (ie, 2 transmit antennas on the downlink network side and 2 receive antennas on the terminal side), 20 MHz bandwidth, urban micro-cell (English: urban micro-cell, abbreviation: UMi) Under the non-line of sight (NLOS) model, the preset channel quality preset value of the system can be: -100dBm, that is, when the measurement result reported by the user equipment is lower than -100dBm When it is indicated, the user terminal needs to perform coverage enhancement; if SINR is used If the channel quality measurement is performed, the preset channel quality preset value of the system may be: -5 dB, that is, when the measurement result reported by the user equipment is lower than -5 dB, it indicates that the user terminal needs to perform coverage enhancement.
同理，当用户设备在移动过程中，不断进行信道质量测量，随着信道环境的变化，当基站接收到的信道质量测量值高于***预设的所述信道质量预设值时，表示该用户设备的下行信道质量较好，不再需要进行覆盖增强，因此，基站向用户设备发送指示消息指示该用户设备由TTI Bundling状态进入Legacy状态。Similarly, when the user equipment is in the process of moving, the channel quality measurement is continuously performed, and when the channel quality measurement value received by the base station is higher than the channel quality preset value preset by the system, the channel environment is changed. The downlink quality of the user equipment is good, and the coverage enhancement is no longer needed. Therefore, the base station sends an indication message to the user equipment to indicate that the user equipment enters the Legacy state by the TTI Bundling state.
605、用户设备根据所述指示消息进入TTI Bundling状态；605. The user equipment enters a TTI Bundling state according to the indication message.
用户设备从Legacy状态进入TTI Bundling状态。The user equipment enters the TTI Bundling state from the Legacy state.
606、同步更新基站该用户设备的状态。606. Synchronize the status of the user equipment of the base station.
用户设备从Legacy状态进入TTI Bundling状态后，用户设备发送成功进入TTI Bundling状态的通知消息通知基站，以同步更新基站侧该用户设备的状态。After the user equipment enters the TTI Bundling state from the Legacy state, the user equipment sends a notification message of successfully entering the TTI Bundling state to notify the base station to synchronously update the state of the user equipment on the base station side.
此时，基站可以确定该小区中存在TTI Bundling状态的用户设备，而其他未进入TTI Bundling状态的用户设备处于Legacy状态，因此基站可以确定该小区中同时存在TTI Bundling状态的用户设备和Legacy状态用户设备。此时基站执行步骤502。At this time, the base station can determine that the user equipment in the TTI Bundling state exists in the cell, and the other user equipment that does not enter the TTI Bundling state is in the Legacy state, so the base station can determine the user equipment and the Legacy status user that have both the TTI Bundling state in the cell. device. At this time, the base station performs step 502.
若基站没有接收到该小区的任何一个用户设备发送的需要进入TTI Bundling状态的通知消息时，基站可以确定该小区中不存在TTI Bundling状态的用户设备，只存在处于Legacy状态的用户设备，则按照3GPP TS 36.211中定义的方式对Legacy状态的用户设备加扰。If the base station does not receive any notification message from the user equipment of the cell that needs to enter the TTI Bundling state, the base station may determine that the user equipment in the TTI Bundling state does not exist in the cell, and only the user equipment in the legacy state is present. The manner defined in 3GPP TS 36.211 scrambles the user equipment in the legacy state.
若所述小区中只存在TTI Bundling状态的用户设备，则基站执行步骤503。If there is only a user equipment in the TTI Bundling state in the cell, the base station performs step 503.
502、基站对发送至TTI Bundling状态的用户设备的数据与对发送至Legacy状态的用户设备的数据使用不同的扰码序列初始值Cinit生成的扰码序列分别进行加扰。502. The base station scrambles the data of the user equipment sent to the TTI Bundling state and the data of the user equipment sent to the Legacy state by using different scrambling code sequences generated by the scrambling sequence initial value Cinit.
根据3GPP TS 36.211描述，对于PDCCH信道，一个TTI中所有用户的DCI信息需要在加扰之前进行用户复用，然后对所有用户统一进行小区级加扰。 According to 3GPP TS 36.211, for the PDCCH channel, DCI information of all users in one TTI needs to be user-multiplexed before scrambling, and then cell-level scrambling is uniformly performed for all users.
本发明实施例中，用户设备分为legacy状态的用户设备和TTI Bundling状态的用户设备；其中legacy状态的用户设备不需要进行数据重复发送，TTI Bundling状态的用户设备需要进行数据重复发送。发送侧为了兼容两类用户设备的处理，需要对复用后的信息分别加扰。In the embodiment of the present invention, the user equipment is divided into a user equipment in a legacy state and a user equipment in a TTI Bundling state. The user equipment in the legacy state does not need to perform data repetition, and the user equipment in the TTI Bundling state needs to perform repeated data transmission. In order to be compatible with the processing of two types of user equipments, the transmitting side needs to separately scramble the multiplexed information.
在加扰时，基站对发送至TTI Bundling状态的用户设备的数据与对发送至Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。其中扰码序列初始值用于生成扰码序列，若扰码序列初始值不同，则生成的扰码序列也不同；若扰码序列初始值相同，则生成的扰码序列相同，反之亦然。At the time of scrambling, the base station scrambles the data of the user equipment transmitted to the TTI Bundling state and the scrambling code sequence generated by using the different scrambling sequence initial values for the data of the user equipment transmitted to the legacy state. The initial value of the scrambling code sequence is used to generate a scrambling code sequence. If the initial value of the scrambling code sequence is different, the generated scrambling code sequence is also different; if the initial value of the scrambling code sequence is the same, the generated scrambling code sequence is the same, and vice versa.
对Legacy状态的用户设备的扰码序列初始值与3GPP TS 36.211标准中定义的初始化序列初始值的生成方式相同。每次发送数据时的扰码序列初始值与时间相关，其中时间为时隙号、子帧号等与时间相关的参数，即每次发送数据时的扰码序列初始值随着时隙号或子帧号等时间参数的变化而变化；并且每次发送的资源映射位置也可以动态调整。例如：对于PDCCH信道中的发送至Legacy状态的用户设备的数据，扰码序列初始值可以为
Figure PCTCN2016107088-appb-000022
其中，cinit为扰码序列初始值，ns为当前PDCCH信道发送的数据所在的时隙号，
Figure PCTCN2016107088-appb-000023
为用户设备所在小区的小区ID。又例如：对于EPDCCH信道中的发送至Legacy状态的用户设备的数据，扰码序列初始值可以为
Figure PCTCN2016107088-appb-000024
其中，cinit为扰码序列初始值，
Figure PCTCN2016107088-appb-000025
为与EPDCCH加扰初始化加扰初始化参数，取值范围0～503。The initial value of the scrambling sequence for the user equipment of the legacy state is generated in the same manner as the initial value of the initialization sequence defined in the 3GPP TS 36.211 standard. The initial value of the scrambling code sequence each time data is transmitted is related to time, wherein time is a time-related parameter such as a slot number and a subframe number, that is, an initial value of the scrambling code sequence each time data is transmitted along with a slot number or The sub-frame number changes as a function of time parameters; and the resource mapping position transmitted each time can also be dynamically adjusted. For example, for the data of the user equipment sent to the Legacy state in the PDCCH channel, the initial value of the scrambling sequence may be
Figure PCTCN2016107088-appb-000022
Where c init is the initial value of the scrambling code sequence, and n s is the slot number of the data transmitted by the current PDCCH channel.
Figure PCTCN2016107088-appb-000023
The cell ID of the cell where the user equipment is located. For another example, for the data of the user equipment sent to the Legacy state in the EPDCCH channel, the initial value of the scrambling sequence may be
Figure PCTCN2016107088-appb-000024
Where c init is the initial value of the scrambling code sequence,
Figure PCTCN2016107088-appb-000025
The scrambling initialization parameter is initialized with the EPDCCH scrambling, and the value ranges from 0 to 503.
EPDCCH加扰序列初始化参数又例如：对于PDSCH信道中的发送至Legacy状态的用户设备的数据，扰码序列初始值可以为
Figure PCTCN2016107088-appb-000026
其中，cinit为扰码序列初始值，q为码字序号，nRNTI为用户设备标识，
Figure PCTCN2016107088-appb-000027
为用户设备所在小区的小区ID。The EPDCCH scrambling sequence initialization parameter is, for example, for the data of the user equipment sent to the Legacy state in the PDSCH channel, the initial value of the scrambling sequence may be
Figure PCTCN2016107088-appb-000026
Where c init is the initial value of the scrambling code sequence, q is the codeword sequence number, and n RNTI is the user equipment identifier.
Figure PCTCN2016107088-appb-000027
The cell ID of the cell where the user equipment is located.
下面详细介绍对TTI Bundling状态的用户设备的加扰。The scrambling of user equipment in the TTI Bundling state is described in detail below.
基站对发送至TTI Bundling状态的用户设备的每包数据进行多次重复发送，基站发送下行数据时的帧结构如图7所示。The base station repeatedly transmits each packet of data of the user equipment sent to the TTI Bundling state, and the frame structure when the base station transmits the downlink data is as shown in FIG. 7.
在图7所示的帧结构中，示出了4个TTI Bundling周期T，TTI Bundling周期T为基站与用户设备约定的时间，即为一个数据包进行多次发送的相对总 时间长度。例如：基站需要将数据包1、数据2、数据包3、数据包4发送至用户终端，在发送时，第1个TTI Bundling周期T内，对数据包1进行重复多次发送，第2个TTI Bundling周期T内，对数据包2进行重复多次发送，第3个TTI Bundling周期T内，对数据包3进行重复多次发送，第4个TTI Bundling周期T内，对数据包4进行重复多次发送。In the frame structure shown in FIG. 7, four TTI Bundling periods T are shown, and the TTI Bundling period T is the time agreed by the base station and the user equipment, that is, the relative total for multiple transmissions of one data packet. length of time. For example, the base station needs to send the data packet 1, the data 2, the data packet 3, and the data packet 4 to the user terminal. When transmitting, during the first TTI Bundling period T, the data packet 1 is repeatedly transmitted multiple times, and the second one is transmitted. In the TTI Bundling period T, the data packet 2 is repeatedly transmitted multiple times, and in the third TTI Bundling period T, the data packet 3 is repeatedly transmitted multiple times, and in the fourth TTI Bundling period T, the data packet 4 is repeated. Send multiple times.
在一个TTI Bundling周期T内，TTI Bundling子帧中的每个子帧都承载同一包数据，TTI Bundling子帧的个数即为发送该数据包的次数M，在此帧结构中，M等于7。在一个TTI Bundling周期T内，第一次发送该数据包称之为“首次发送”，之后的N次发送该数据包称之为“重复发送“，在此帧结构中，N等于6。In a TTI Bundling period T, each subframe in a TTI Bundling subframe carries the same packet data, and the number of TTI Bundling subframes is the number M of times the packet is transmitted. In this frame structure, M is equal to 7. In a TTI Bundling period T, the first transmission of the data packet is referred to as "first transmission", and the subsequent N transmission of the data packet is referred to as "repetitive transmission". In this frame structure, N is equal to 6.
在一个TTI Bundling周期T内，帧结构的具体形式不限。在图7所示的第一个TTI Bundling周期T内的帧结构中，前三个子帧为TTI Bundling子帧，在一些上行子帧、一些未被占用的子帧后再连续四个TTI Bundling子帧；第二个TTI Bundling周期T内的帧结构中，前几个子帧都未被占用，后面才是7个TTI Bundling子帧；在第三个TTI Bundling周期T与第一个TTI Bundling周期T相同，前三个子帧为TTI Bundling子帧，在一些上行子帧、一些未被占用的子帧后再连续四个TTI Bundling子帧；在第四个TTI Bundling周期T内，在一些上行子帧后，有三个TTI Bundling子帧，接着一些未被占用的子帧后，有四个TTI Bundling子帧。此处只是以四个TTI Bundling周期T为例进行说明，并不对帧结构的具体形式进行限定。In a TTI Bundling period T, the specific form of the frame structure is not limited. In the frame structure in the first TTI Bundling period T shown in FIG. 7, the first three subframes are TTI Bundling subframes, and after four uplink subframes and some unoccupied subframes, four TTI Bundling children are consecutively connected. Frame; in the frame structure in the second TTI Bundling period T, the first few subframes are unoccupied, followed by 7 TTI Bundling subframes; in the third TTI Bundling period T and the first TTI Bundling period T Similarly, the first three subframes are TTI Bundling subframes, and after four uplink subframes and some unoccupied subframes, four TTI Bundling subframes are consecutive; in the fourth TTI Bundling period T, in some uplink subframes. After that, there are three TTI Bundling subframes, followed by some unoccupied subframes, and there are four TTI Bundling subframes. Here, only four TTI Bundling periods T are taken as an example, and the specific form of the frame structure is not limited.
基站对发送至TTI Bundling状态的用户设备的每包数据进行多次重复发送后，用户设备端根据重复次数对每包数据进行数据的合并，在用户设备端进行数据合并的方式如图8所示，可以采用IQ数据的合并，如图8中所示的合并方式一；也可以进行LLR数据的合并，如图8中所示的合并方式二。本发明实施例适用的范围为合并方式一所示的IQ数据的合并。After the base station repeatedly transmits each packet of data of the user equipment sent to the TTI Bundling state, the user equipment unit combines the data of each packet according to the number of repetitions, and the data is merged at the user equipment end as shown in FIG. The merging of the IQ data may be employed, as in the merging mode 1 shown in FIG. 8; the merging of the LLR data may also be performed, as shown in the merging mode 2 shown in FIG. The scope applicable to the embodiment of the present invention is the merging of the IQ data shown in the merge mode one.
一方面，不管是哪种合并方式，都需要保证合并的原始数据是相同的，即基站侧发送的原始数据必须相同。On the one hand, regardless of the combination mode, it is necessary to ensure that the original data of the combination is the same, that is, the original data sent by the base station side must be the same.
另一方面，为了使重复发送的数据能够被用户设备侧正确合并，在发送侧 进行资源映射时，基站侧需要使TTI Bundling用户在每个重复发送的TTI，资源映射位置都与首次发送的映射位置相同。On the other hand, in order to enable the repeatedly transmitted data to be correctly merged by the user equipment side, on the transmitting side When performing resource mapping, the base station side needs to make the TTI Bundling user transmit the TTIs in each repetition, and the resource mapping locations are the same as the mapping locations sent for the first time.
具体的，对于PDCCH/EPDCCH信道来说，每个用户的资源映射位置由网络侧决定，用户设备侧通过盲检每个搜索空间进行该用户PDCCH/EPDCCH的检测。因此，为了保证PDCCH/EPDCCH数据能够正确合并，基站侧需要保证TTI Bundling用户在每个重复发送的TTI，PDCCH/EPDCCH的映射位置都与首次发送的映射位置相同。对于PDSCH信道来说，重复发送的每个PDSCH信道，资源映射位置都是由PDCCH/EPDCCH指示的；由于PDCCH/EPDCCH每次发送的原始数据相同，所以实际上每次重复发送PDSCH的TTI，其PDSCH的资源位置都是相同的。Specifically, for the PDCCH/EPDCCH channel, the resource mapping position of each user is determined by the network side, and the user equipment side performs the detection of the user PDCCH/EPDCCH by blindly detecting each search space. Therefore, in order to ensure that the PDCCH/EPDCCH data can be correctly merged, the base station side needs to ensure that the TTI Bundling user is in the TTI for each repeated transmission, and the mapping position of the PDCCH/EPDCCH is the same as the mapping position of the first transmission. For the PDSCH channel, the resource mapping position is indicated by the PDCCH/EPDCCH for each PDSCH channel that is repeatedly transmitted. Since the original data transmitted by the PDCCH/EPDCCH is the same, the TTI of the PDSCH is actually transmitted every time. The resource locations of the PDSCH are the same.
另一方面，对于IQ数据合并，由于接收侧还没有进行解扰处理，因此发送侧还需要保证TTI Bundling用户在重复发送的每个TTI，使用的扰码序列保持不变，即要求生成扰码序列的扰码序列初始值Cinit保持不变。因此，对发送至TTI Bundling状态的用户设备的数据所使用的扰码序列初始值不再和时隙号、子帧号等时间参数紧密相关。On the other hand, for the IQ data merging, since the receiving side has not performed the descrambling process, the transmitting side also needs to ensure that each TTI that the TTI Bundling user repeatedly transmits, the scrambling code sequence used remains unchanged, that is, the scrambling code is required to be generated. The initial value of the scrambling sequence of the sequence, Cinit, remains unchanged. Therefore, the initial value of the scrambling code sequence used for the data of the user equipment transmitted to the TTI Bundling state is no longer closely related to the time parameters such as the slot number and the subframe number.
基站对发送至TTI Bundling状态的用户设备的每包数据进行多次重复发送，下面以重复发送第一数据为例对加扰该第一数据所使用的扰码序列初始值维持不变进行说明，此处的“第一”并不是描述特定的数据先后顺序，“第一数据”是指是以基站发送给TTI Bundling状态的用户设备的其中一包数据为例进行举例说明，例如：图7中的举例的每个TTI Bundling周期T内发送的数据包都可以认为是“第一数据”，即：“第一数据”可以是数据包1，也可以是数据包2，还可以是数据包3，还可以是数据包4。The base station repeatedly transmits each packet of data of the user equipment that is sent to the TTI Bundling state. The following is an example of repeatedly transmitting the first data as an example to describe that the initial value of the scrambling code sequence used to scramble the first data remains unchanged. The "first" here is not a description of a specific data sequence. The "first data" is an example of one packet of data of a user equipment that is sent by the base station to the TTI Bundling state. For example, in FIG. For example, the data packet sent in each TTI Bundling period T can be regarded as "first data", that is, "first data" can be data packet 1, data packet 2, or data packet 3 It can also be packet 4.
具体使用的扰码序列初始值可以通过以下几种方式计算得到：The initial value of the specific scrambling code sequence can be calculated in the following ways:
第一种方式：The first way:
发送所述第一数据所在的首子帧所使用的扰码序列初始值与时间相关，其中时间当前信道首次发送所述第一数据所在的时隙号、子帧号等与时间相关的参数，之后重复发送所述第一数据所使用的扰码序列初始值与首次发送所述第一数据所使用的扰码序列初始值相同。 The initial value of the scrambling code sequence used by the first subframe in which the first data is sent is time-dependent, where the current channel first transmits the time-related parameters such as the slot number and the subframe number where the first data is located, The initial value of the scrambling code sequence used to repeatedly transmit the first data is then the same as the initial value of the scrambling code sequence used for first transmitting the first data.
基站发送至TTI Bundling用户设备的第一数据首次发送所使用的扰码序列初始值可以维持和Legacy用户相同，与时隙号或子帧号相关，之后重复发送时所使用的扰码序列初始值与首次发送所使用的扰码序列初始值相同，与时隙号或子帧号无关。The initial value of the scrambling code sequence used for the first transmission of the first data sent by the base station to the TTI Bundling user equipment may be the same as that of the legacy user, related to the slot number or the subframe number, and then the initial value of the scrambling code sequence used for repeated transmission. It is the same as the initial value of the scrambling code sequence used for the first transmission, regardless of the slot number or subframe number.
若所述第一数据为DCI信息，则对于承载DCI信息的PDCCH信道来说，首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000028
cinit为扰码序列初始值，ns为当前PDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000029
为用户设备所在小区的小区ID。对于承载DCI信息的EPDCCH信道来说，首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000030
cinit为扰码序列初始值，ns为当前EPDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000031
为与EPDCCH加扰初始化参数，取值范围0～503。但在后续重复发送期间，扰码序列初始值维持不变，即计算所述cinit所使用的时隙号使用首次发送所用的时隙号。若在一个周期内，对第一数据重复发送的次数为4次，则在后面的3次重复发送时，每次所使用的扰码序列初始值与首次发送所使用的扰码序列初始值相同，因此后面3次重复发送时所使用的加扰序列与时隙号无关。If the first data is DCI information, for the PDCCH channel carrying the DCI information, the initial value of the scrambling code sequence used for transmitting the first data for the first time may be
Figure PCTCN2016107088-appb-000028
c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current PDCCH channel.
Figure PCTCN2016107088-appb-000029
The cell ID of the cell where the user equipment is located. For the EPDCCH channel carrying the DCI information, the initial value of the scrambling code sequence used for transmitting the first data for the first time may be
Figure PCTCN2016107088-appb-000030
c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current EPDCCH channel.
Figure PCTCN2016107088-appb-000031
To initialize the parameters with the EPDCCH, the value ranges from 0 to 503. However, during the subsequent repeated transmission, the initial value of the scrambling code sequence remains unchanged, that is, the slot number used by the c init is calculated using the slot number used for the first transmission. If the number of times of repeating the first data is 4 times in one cycle, the initial value of the scrambling code sequence used each time is the same as the initial value of the scrambling code sequence used for the first transmission in the subsequent 3 repeated transmissions. Therefore, the scrambling sequence used in the subsequent three repeated transmissions is independent of the slot number.
若所述第一数据为数据(Data)，对于承载数据的PDSCH信道来说，首次发送第一数据所使用扰码序列初始值为
Figure PCTCN2016107088-appb-000032
其中，cinit为扰码序列初始值，q为码字序号，nRNTI为用户设备标识，ns为当前PDSCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000033
为用户设备所在小区的小区ID。同样，若在一个周期内，对该第一数据再重复发送的次数为4次，则在后面的3次重复发送时，每次所使用的扰码序列初始值与首次发送所使用的扰码序列初始值相同，因此后面3次重复发送时所使用的加扰序列与时隙号无关。If the first data is data (Data), for the PDSCH channel carrying the data, the initial value of the scrambling code sequence used for transmitting the first data for the first time is
Figure PCTCN2016107088-appb-000032
Wherein, c init is the initial value of the scrambling code sequence, q is the codeword sequence number, n RNTI is the user equipment identifier, and n s is the time slot number where the first data is sent by the current PDSCH channel.
Figure PCTCN2016107088-appb-000033
The cell ID of the cell where the user equipment is located. Similarly, if the number of times of repeating the transmission of the first data is four times in one cycle, the initial value of the scrambling code sequence used each time and the scrambling code used for the first transmission are used in the subsequent three repeated transmissions. The initial values of the sequences are the same, so the scrambling sequence used in the subsequent three repeated transmissions is independent of the slot number.
需要说明的是，第一种方式中PDCCH/EPDCCH信道和PDSCH信道所采用的扰码序列初始值计算的公式仅是一种可行的实现方式，还可以依据实际情况采用其他的计算公式，可以根据其他的参数得到该扰码序列初始值。It should be noted that, in the first mode, the formula for calculating the initial value of the scrambling code sequence used in the PDCCH/EPDCCH channel and the PDSCH channel is only a feasible implementation manner, and other calculation formulas may be adopted according to actual conditions, and may be Other parameters get the initial value of the scrambling code sequence.
第二种方式：The second way:
首次发送所述第一数据所使用的扰码序列初始值为根据加扰参数确定的扰码序列初始值，其中加扰参数不包括当前信道首次发送所述第一数据所在的 时隙号(或子帧号)，也就是说首次发送使用的扰码序列初始值也与时间无关(时间指子帧号或时隙号等与时间相关的参数)，后续重复发送所述第一数据所使用的扰码序列初始值与所述首次发送所述第一数据所使用的扰码序列初始值相同。在此种方式中，首次发送和重复发送的TTI均可以不考虑时隙号或子帧号的影响。The initial value of the scrambling code sequence used for transmitting the first data for the first time is an initial value of the scrambling code sequence determined according to the scrambling parameter, where the scrambling parameter does not include the current channel where the first data is sent for the first time. The slot number (or subframe number), that is, the initial value of the scrambling code sequence used for the first transmission is also independent of time (time refers to a time-related parameter such as a subframe number or a slot number), and the subsequent repetition is transmitted. The initial value of the scrambling code sequence used for a data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time. In this manner, the TTI for the first transmission and the repeated transmission may not affect the influence of the slot number or the subframe number.
若所述第一数据为DCI信息，则对于承载DCI信息的PDCCH信道来说，首次发送和重复发送(即每次发送)第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000034
即扰码序列初始值只与小区的小区ID有关。对于承载DCI信息的EPDCCH信道来说，首次发送和重复发送(即每次发送)第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000035
即扰码序列初始值只与EPDCCH加扰初始化参数
Figure PCTCN2016107088-appb-000036
有关，
Figure PCTCN2016107088-appb-000037
取值范围0～503。If the first data is DCI information, for the PDCCH channel carrying the DCI information, the initial value of the scrambling code sequence used for the first transmission and the repeated transmission (ie, each transmission) of the first data may be
Figure PCTCN2016107088-appb-000034
That is, the initial value of the scrambling code sequence is only related to the cell ID of the cell. For the EPDCCH channel carrying the DCI information, the initial value of the scrambling code sequence used for the first transmission and the repeated transmission (ie, each transmission) of the first data may be
Figure PCTCN2016107088-appb-000035
That is, the initial value of the scrambling code sequence is only related to the EPDCCH scrambling initialization parameter.
Figure PCTCN2016107088-appb-000036
related,
Figure PCTCN2016107088-appb-000037
The value ranges from 0 to 503.
若所述第一数据为数据(Data)，对于承载数据的PDSCH信道来说，首次发送和重复发送(即每次发送)第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000038
即扰码序列初始值与用户设备标识、码字序号以及小区ID有关。If the first data is data (Data), for the PDSCH channel carrying the data, the initial value of the scrambling code sequence used for the first transmission and the repeated transmission (ie, each transmission) of the first data may be
Figure PCTCN2016107088-appb-000038
That is, the initial value of the scrambling code sequence is related to the user equipment identifier, the codeword sequence number, and the cell ID.
同理，需要说明的是，第二种方式中，PDCCH/EPDCCH信道和PDSCH信道所采用的扰码序列初始值计算的公式仅是一种可行的实现方式，还可以依据实际情况采用其他的计算公式，可以根据其他的参数得到该加扰初始化序列，甚至可以根据一个随机值来生成扰码序列初始值。Similarly, it should be noted that, in the second mode, the formula for calculating the initial value of the scrambling code sequence used by the PDCCH/EPDCCH channel and the PDSCH channel is only a feasible implementation manner, and other calculations may be adopted according to actual conditions. The formula can obtain the scrambling initialization sequence according to other parameters, and can even generate the initial value of the scrambling sequence according to a random value.
具体加扰的过程与3GPP TS 36.211中定义的过程相同。The process of specific scrambling is the same as that defined in 3GPP TS 36.211.
对于PDCCH信道，复用后比特块为
Figure PCTCN2016107088-appb-000039
其中
Figure PCTCN2016107088-appb-000040
为第i个PDCCH信道在一个子帧内传输的比特数，nPDCCH为该子帧对应的PDCCH个数；复用后的比特块使用如下方式加扰：For the PDCCH channel, the multiplexed bit block is
Figure PCTCN2016107088-appb-000039
among them
Figure PCTCN2016107088-appb-000040
For the number of bits of the i-th PDCCH channel transmitted in one subframe, n PDCCH is the number of PDCCHs corresponding to the subframe; the multiplexed bit block is scrambled as follows:
Figure PCTCN2016107088-appb-000041
Figure PCTCN2016107088-appb-000041
加扰后比特块为
Figure PCTCN2016107088-appb-000042
其中c(i)为加扰伪随机序列，该加扰序列产生器由cinit初始化，cinit的取值由上述第一种方式和第二种方式中在PDCCH信道中cinit的计算方法确定。 After scrambling, the bit block is
Figure PCTCN2016107088-appb-000042
Where c (i) is a pseudo-random scrambling sequence, the scrambling sequence generator initialization init, init value of c is determined by c by the first embodiment and the second embodiment in the calculation method of the PDCCH channel c init .
对于EPDCCH信道，用户间数据不需要复用，每个用户加扰前比特块为b(0),...,b(Mbit-1)，其中
Figure PCTCN2016107088-appb-000043
为一个子帧内该用户EPDCCH信道传输的比特数。比特块使用如下方式加扰：For the EPDCCH channel, the inter-user data does not need to be multiplexed, and the bit block before each user scrambling is b(0),...,b(M bit -1), where
Figure PCTCN2016107088-appb-000043
The number of bits transmitted for the user EPDCCH channel within one subframe. Bit blocks are scrambled as follows:
Figure PCTCN2016107088-appb-000044
Figure PCTCN2016107088-appb-000044
加扰后比特块为
Figure PCTCN2016107088-appb-000045
其中c(i)为加扰伪随机序列，该加扰序列产生器由cinit初始化，cinit的取值由上述第一种方式和第二种方式中在EPDCCH信道中cinit的计算方法确定。After scrambling, the bit block is
Figure PCTCN2016107088-appb-000045
Where c (i) is a pseudo-random scrambling sequence, the scrambling sequence generator initialization init, init value of c is determined by c by the first embodiment and the second embodiment in the calculation method of EPDCCH channel c init .
对于PDSCH信道，码字q加扰前比特块为
Figure PCTCN2016107088-appb-000046
其中
Figure PCTCN2016107088-appb-000047
为一个子帧中物理信道传输的码字q对应的比特数；码字q使用如下方式加扰：For the PDSCH channel, the codeword q is scrambled before the bit block is
Figure PCTCN2016107088-appb-000046
among them
Figure PCTCN2016107088-appb-000047
The number of bits corresponding to the codeword q transmitted on the physical channel in one subframe; the codeword q is scrambled as follows:
Figure PCTCN2016107088-appb-000048
Figure PCTCN2016107088-appb-000048
加扰后比特块为
Figure PCTCN2016107088-appb-000049
其中c(q)(i)为加扰伪随机序列，该加扰序列产生器由cinit初始化，cinit的取值由上述第一种方式和第二种方式中在PDSCH信道中cinit的计算方法确定。After scrambling, the bit block is
Figure PCTCN2016107088-appb-000049
Where c (q) (i) is a pseudo-random scrambling sequence, the scrambling sequence generated by the initialization c init, c init values by the first embodiment and the second embodiment of the PDSCH channel c init The calculation method is determined.
加扰伪随机序列生成过程如下：The scrambling pseudo-random sequence generation process is as follows:
伪随机序列c(n)由Gold序列生成，定义如下：The pseudo-random sequence c(n) is generated by the Gold sequence and is defined as follows:
c(n)＝(x1(n+NC)+x2(n+NC))mod 2c(n)=(x 1 (n+N C )+x 2 (n+N C ))mod 2
x1(n+31)＝(x1(n+3)+x1(n))mod 2x 1 (n+31)=(x 1 (n+3)+x 1 (n)) mod 2
x2(n+31)＝(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2x 2 (n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n)) mod 2
其中，NC＝1600，第一个m序列通过x1(0)＝1,x1(n)＝0,n＝1,2,...,30初始化；第二个m序列初始化由
Figure PCTCN2016107088-appb-000050
表示，其中cinit根据不同的应用场景设置，在每个信道中有不同的取值，例如上述第一种方式和第二种方式中对cinit的取值。Where N C = 1600, the first m sequence is initialized by x 1 (0) = 1, x 1 (n) = 0, n = 1, 2, ..., 30; the second m sequence is initialized by
Figure PCTCN2016107088-appb-000050
Indicates that c init is set according to different application scenarios, and has different values in each channel, for example, the values of c init in the first mode and the second mode.
网络侧(基站侧)对legacy状态的用户设备和TTI Bundling状态的用户设备分别加扰的具体过程如图9所示。The specific process of scrambling the user equipment in the legacy state and the user equipment in the TTI Bundling state on the network side (the base station side) is as shown in FIG. 9.
复用后的原始信息，包含发送至legacy状态的用户设备的原始数据和发送至TTI Bundling状态的用户设备的原始数据，由于两者扰码序列初始值cinit可能不同，因此需要分别加扰。以加扰的信道为PDCCH信道，原始信息为DCI原始信息为例进行说明。The multiplexed original information, including the original data of the user equipment sent to the legacy state and the original data of the user equipment sent to the TTI Bundling state, needs to be scrambled separately because the initial values of the scrambling sequence c init may be different. The case where the scrambled channel is the PDCCH channel and the original information is the DCI original information is taken as an example for description.
假设复用后DCI原始信息bit长度为Mbit，则首先根据Legacy状态的用户设备的扰码序列初始值生成长度为Mbit的扰码，并根据调度指示，使用处于 相同bit顺序的扰码序列对相应位置的Legacy用户的DCI信息进行加扰，而TTI Bundling状态的用户设备的DCI信息不加扰，相应的也需要跨过TTI Bundling状态的用户设备对应的DCI长度的扰码序列。Assuming that the bit length of the DCI original information after multiplexing is M bit , firstly, a scrambling code of length M bit is generated according to the initial value of the scrambling code sequence of the user equipment in the legacy state, and the scrambling code sequence in the same bit order is used according to the scheduling indication. The DCI information of the user of the corresponding location is scrambled, and the DCI information of the user equipment in the TTI Bundling state is not scrambled, and the scrambling code sequence of the DCI length corresponding to the user equipment in the TTI Bundling state is also required.
然后根据TTI Bundling状态的用户设备的扰码序列初始值同样生成长度Mbit的扰码，根据调度指示，使用处于相同bit顺序的扰码序列对相应位置的TTI Bundling状态的用户设备的DCI信息进行加扰，而Legacy状态的用户设备的DCI信息不再加扰，相应的也需要跨过Legacy状态的用户设备对应的DCI长度的扰码序列。Then, according to the initial value of the scrambling code sequence of the user equipment in the TTI Bundling state, the scrambling code of the length M bit is also generated, and according to the scheduling indication, the DCI information of the user equipment in the TTI Bundling state at the corresponding position is performed by using the scrambling code sequence in the same bit order. The DCI information of the user equipment in the Legacy state is no longer scrambled, and the scrambling code sequence of the DCI length corresponding to the user equipment of the Legacy state is also required.
最后得到经过两次独立加扰的DCI信息，承载在该TTI的PDCCH信道上发送。Finally, DCI information that has undergone two independent scrambling is obtained, and the bearer information is transmitted on the PDCCH channel of the TTI.
同样，若加扰的信道为EPDCCH信道，原始信息为DCI原始信息，则EPDCCH加扰按照用户处理，根据用户状态，使用不同的扰码序列对应加扰。同样，若加扰的信道为PDSCH信道，原始信息为Data原始信息，则PDSCH加扰按照用户处理，根据用户状态，使用不同的扰码序列对应加扰。Similarly, if the scrambled channel is an EPDCCH channel and the original information is DCI original information, the EPDCCH scrambling is processed according to the user, and different scrambling code sequences are used corresponding to scrambling according to the user state. Similarly, if the scrambled channel is a PDSCH channel and the original information is Data original information, the PDSCH scrambling is processed according to the user, and different scrambling code sequences are used for scrambling according to the user state.
503、基站对发送至TTI Bundling状态的用户设备的数据进行加扰。503. The base station scrambles data of the user equipment sent to the TTI Bundling state.
步骤502中，是为了与Legacy用户兼容，发送侧对Legacy用户和TTI Bundling用户进行了区分，对这两种用户使用不同的扰码序列初始值生成扰码序列。In step 502, in order to be compatible with the Legacy user, the transmitting side distinguishes the Legacy user from the TTI Bundling user, and generates a scrambling code sequence for the two users using different scrambling code sequence initial values.
但在实际***中，比如独立部署的Standalone基站，只需要支持覆盖增强的用户，可能不再存在Legacy用户，此时，基站侧可以不再区分Legacy用户和TTI Bundling用户，若小区中只存在TTI Bundling状态的用户设备，基站对发送至所有用户设备的数据进行覆盖增强，即对发送至所有用户设备的每包数据都进行多次重复发送。However, in an actual system, for example, a Standalone base station that is deployed independently needs to support the user with the coverage enhancement. The legacy user may no longer exist. In this case, the base station side can no longer distinguish between the legacy user and the TTI Bundling user. In the Bundling state user equipment, the base station performs coverage enhancement on the data sent to all user equipments, that is, repeatedly transmits each packet of data sent to all user equipments.
使用下行TTI Bundling技术对TTI Bundling用户进行覆盖增强的实现要求与步骤502中对TTI Bundling用户进行覆盖增强的要求相同。以重复发送第二数据为例，需要满足的要求包括：The implementation requirements for coverage enhancement of TTI Bundling users using the downlink TTI Bundling technology are the same as those for the TTI Bundling users in step 502. Taking the second data repeatedly as an example, the requirements to be met include:
1、在重复发送的每个TTI，重复发送的原始数据必须相同；1. The original data repeatedly sent must be the same for each TTI that is repeatedly sent;
2、在重复发送的每个TTI，资源映射位置也需要相同； 2. The resource mapping location needs to be the same for each TTI that is repeatedly sent;
3、在重复发送的每个TTI，使用的扰码序列初始值维持不变。3. The initial value of the scrambling code sequence used remains unchanged for each TTI that is repeatedly transmitted.
需要说明的是，此处的第二数据中的“第二”并不是描述特定的数据先后顺序，而只是对以基站发送给用户设备端的其中一个数据为例进行举例说明。It should be noted that the “second” in the second data herein is not a description of a specific data sequence, but only one of the data sent by the base station to the user equipment is taken as an example.
所有用户设备采用相同的扰码序列初始值cinit，该扰码序列初始值生成公式中与时间相关的变量无关，其中时间是指子帧号/时隙号等。扰码序列初始值cinit具体的计算方式参见步骤502中的第一种方式和第二种方式中的描述。All user equipments use the same scrambling code sequence initial value c init , which is independent of time-dependent variables in the initial value generation formula of the scrambling code sequence, where time refers to the subframe number/slot number and the like. For the specific calculation method of the initial value c init of the scrambling code sequence, refer to the description in the first mode and the second mode in step 502.
需要说明的是，本发明实施例中，基站在部署时，就已经设置某小区中所有用户设备都支持TTI Bundling，该小区中只存在需要覆盖增强的TTI Bundling用户设备，则基站可以确认小区中只存在TTI Bundling用户设备。还可以由小区中的所有用户都上报能力上报消息以告知支持TTI Bundling能力，基站指示所有的用户设备都进入TTI Bundling状态，通过此种方式基站可以确定小区中只存在TTI Bundling状态的用户设备。还可以是通过其他方式确定，本发明实施例不做限定。It should be noted that, in the embodiment of the present invention, when the base station is deployed, all the user equipments in a certain cell support TTI Bundling. In the cell, only the TTI Bundling user equipment requiring coverage enhancement exists, and the base station can confirm the cell. There are only TTI Bundling user devices. The capability reporting message can also be reported by all the users in the cell to inform the TTI Bundling capability. The base station instructs all user equipments to enter the TTI Bundling state. In this manner, the base station can determine the user equipment in the cell with only the TTI Bundling state. It is also determined by other means, which is not limited by the embodiment of the present invention.
此种方式下，基站对小区下的所有用户设备都进行覆盖增强，加扰时采用的扰码序列初始值与子帧号/时隙号等与时间相关的参数无关，从而可以简化发送侧的处理。In this manner, the base station performs coverage enhancement on all user equipments in the cell, and the initial value of the scrambling code sequence used in scrambling is independent of time-related parameters such as the subframe number/slot number, thereby simplifying the transmitting side. deal with.
下面介绍用户设备对接收到的数据进行IQ数据合并进行介绍。The following describes the user equipment to perform IQ data merging on the received data.
由于用户设备侧的状态由网络侧配置，即处于Legacy状态或者TTI Bundling状态由基站进行配置。legacy状态的用户设备不需要进行数据合并，接收处理方式与3GPP TS 36.211保持不变，TTI Bundling状态的用户设备可以直接进行IQ数据合并，再经过解星座点映射/解IQ数据后采用TTI Bundling对应的扰码序列进行解扰并译码。The state of the user equipment side is configured by the network side, that is, it is in the Legacy state or the TTI Bundling state is configured by the base station. The user equipment in the legacy state does not need to perform data merging, and the receiving processing mode is unchanged from 3GPP TS 36.211. The user equipment in the TTI Bundling state can directly perform IQ data merging, and then adopt TTI Bundling corresponding to the constellation point mapping/solution IQ data. The scrambling sequence is descrambled and decoded.
本发明实施例在网络侧调度时，对用户进行了区分，分为不需要进行覆盖增强的Legacy状态的用户设备和需要进行覆盖增强的TTI Bundling状态的用户设备，对这两种用户设备采用不同的扰码序列初始值分别进行加扰。其中，对于Legacy状态的用户设备，扰码序列初始值的生成方式不变，只改变需要覆盖增强的TTI Bundling状态的扰码序列初始值的生成方式，故使用该技术的 网络***可以同时兼容legacy用户设备和TTI Bundling用户设备，在实际部署中具有更好的灵活性。In the embodiment of the present invention, when the network side is scheduled, the user is divided into user equipments that do not need to be covered in the enhanced legacy state and user equipments that need to be in the enhanced TTI Bundling state, and the two user equipments are different. The initial values of the scrambling sequence are scrambled separately. For the user equipment in the legacy state, the initial value of the scrambling code sequence is generated in the same manner, and only the initial value of the scrambling code sequence that needs to cover the enhanced TTI Bundling state is changed, so the technology is used. The network system can be compatible with both legacy user equipment and TTI Bundling user equipment, providing greater flexibility in actual deployment.
以上是对本发明实施例中的下行信道加扰、解扰方法进行的介绍，下面对本发明实施例中的下行信道加扰装置、下行信道解扰装置，以及下行覆盖增强***中的基站、用户设备进行介绍。The foregoing is a description of the downlink channel scrambling and descrambling method in the embodiment of the present invention. The following is a downlink channel scrambling device, a downlink channel descrambling device, and a base station and user equipment in the downlink coverage enhancement system in the embodiment of the present invention. Introduce.
如图10所示，从功能模块结构上来说，下行信道加扰装置包括：As shown in FIG. 10, from the functional module structure, the downlink channel scrambling device includes:
判断单元901，用于判断小区中是否同时存在传输时间间隔绑定TTI Bundling状态的用户设备和传统Legacy状态的用户设备，其中，TTI Bundling状态的用户设备为发送下行数据使用TTIBundling进行覆盖增强的用户设备，Legacy状态的用户设备为发送下行数据不使用TTIBundling进行覆盖增强的用户设备；The determining unit 901 is configured to determine, in the cell, whether the user equipment in the TTI Bundling state and the user equipment in the traditional legacy state are both in the TTI Bundling state, where the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement. The user equipment of the device in the legacy state is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement;
加扰单元902，用于当确定同时存在TTI Bundling状态的用户设备和Legacy状态的用户设备时，则对发送至TTI Bundling状态的用户设备的数据与对发送至Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。The scrambling unit 902 is configured to: when determining that the user equipment of the TTI Bundling state and the user equipment of the Legacy state exist simultaneously, the data of the user equipment sent to the TTI Bundling state is different from the data of the user equipment sent to the Legacy state. The scrambling code sequence generated by the initial value of the scrambling code sequence is scrambled separately.
在一些具体的实施中，基站发送至TTI Bundling状态的用户设备的数据中包括重复发送的第一数据，每次发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值相同。In some specific implementations, the data of the user equipment that is sent by the base station to the TTI Bundling state includes the first data that is repeatedly sent, and the initial scrambling code sequence used by the scrambling unit 902 to scramble the first data each time the first data is sent. The values are the same.
在一些具体的实施中，首次发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值与当前信道首次发送第一数据所在的时隙号相关，重复发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值与首次发送第一数据所使用的扰码序列初始值相同。In some specific implementations, when the first data is sent for the first time, the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data is related to the slot number in which the current channel first transmits the first data, and the first data is repeatedly sent. The initial value of the scrambling code sequence used by the time scrambling unit 902 to scramble the first data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time.
可选的，在此种加扰序列初始值与时隙号相关的情况下，若发送第一数据的信道为PDCCH信道，则首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000051
cinit为扰码序列初始值，ns为当前PDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000052
为用户设备所在小区的小区ID。Optionally, if the initial value of the scrambling sequence is related to the slot number, if the channel that sends the first data is the PDCCH channel, the initial value of the scrambling sequence used for transmitting the first data for the first time may be
Figure PCTCN2016107088-appb-000051
c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current PDCCH channel.
Figure PCTCN2016107088-appb-000052
The cell ID of the cell where the user equipment is located.
可选的，在此种加扰序列初始值与时隙号相关的情况下，若发送第一数据的信道为EPDCCH信道，则首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000053
cinit为扰码序列初始值，ns为当前EPDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000054
为与EPDCCH加扰初始化参数，取值范围0～503。Optionally, if the initial value of the scrambling sequence is related to the slot number, if the channel that sends the first data is an EPDCCH channel, the initial value of the scrambling sequence used for transmitting the first data for the first time may be
Figure PCTCN2016107088-appb-000053
c init is the initial value of the scrambling code sequence, and n s is the slot number where the first data is sent by the current EPDCCH channel.
Figure PCTCN2016107088-appb-000054
To initialize the parameters with the EPDCCH, the value ranges from 0 to 503.
可选的，在此种加扰序列初始值与时隙号相关的情况下，若发送第一数据的信道为PDSCH信道，则首次发送第一数据所使用扰码序列初始值可以为
Figure PCTCN2016107088-appb-000055
其中，cinit为扰码序列初始值，q为码字序号，nRNTI为用户设备标识，ns为当前PDCCH信道首次发送第一数据所在的时隙号，
Figure PCTCN2016107088-appb-000056
为用户设备所在小区的小区ID。Optionally, if the initial value of the scrambling sequence is related to the slot number, if the channel that sends the first data is a PDSCH channel, the initial value of the scrambling sequence used for transmitting the first data for the first time may be
Figure PCTCN2016107088-appb-000055
Wherein, c init is the initial value of the scrambling code sequence, q is the codeword sequence number, n RNTI is the user equipment identifier, and n s is the time slot number where the first PDCCH channel first transmits the first data.
Figure PCTCN2016107088-appb-000056
The cell ID of the cell where the user equipment is located.
在一些具体的实施中，首次发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值为根据加扰参数确定的扰码序列初始值，加扰参数不包括当前信道首次发送第一数据所在的时隙号，重复发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值与首次发送第一数据所使用的扰码序列初始值相同。In some specific implementations, the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is sent for the first time is the initial value of the scrambling code sequence determined according to the scrambling parameter, and the scrambling parameter does not include the current channel. The slot number in which the first data is transmitted for the first time, and the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is repeatedly transmitted is the same as the initial value of the scrambling code sequence used for first transmitting the first data.
可选的，在此种加扰序列初始值与时隙号无关的情况下，若发送第一数据的信道为PDCCH信道，则首次发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000057
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000058
为小区的小区ID，cinit为发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值。Optionally, if the initial value of the scrambling sequence is independent of the slot number, if the channel that sends the first data is the PDCCH channel, the scrambling unit 902 scrambles the first data when the first data is sent for the first time. The initial value of the scrambling sequence is according to the formula
Figure PCTCN2016107088-appb-000057
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000058
For the cell ID of the cell, c init is the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is transmitted.
可选的，在此种加扰序列初始值与时隙号无关的情况下，若发送第一数据的信道为EPDCCH信道，则首次发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000059
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000060
为与EPDCCH加扰初始化参数，取值范围0～503，cinit为发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值。Optionally, if the initial value of the scrambling sequence is independent of the slot number, if the channel that sends the first data is an EPDCCH channel, the scrambling unit 902 scrambles the first data when the first data is sent for the first time. The initial value of the scrambling sequence is according to the formula
Figure PCTCN2016107088-appb-000059
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000060
To initialize the parameter with the EPDCCH, the value ranges from 0 to 503, and c init is the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is transmitted.
可选的，在此种加扰序列初始值与时隙号无关的情况下，若发送第一数据的信道为PDSCH信道，则首次发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值为根据公式
Figure PCTCN2016107088-appb-000061
计算的扰码序列初始值，其中，
Figure PCTCN2016107088-appb-000062
为小区的小区ID，nRNTI为TTI Bundling状态的用户设备标识，q为码字序号，cinit为发送第一数据时加扰单元902加扰第一数据所使用的扰码序列初始值。 Optionally, if the initial value of the scrambling sequence is independent of the slot number, if the channel that sends the first data is the PDSCH channel, the scrambling unit 902 scrambles the first data when the first data is sent for the first time. The initial value of the scrambling sequence is according to the formula
Figure PCTCN2016107088-appb-000061
The initial value of the calculated scrambling sequence, where
Figure PCTCN2016107088-appb-000062
For the cell ID of the cell, n RNTI is the user equipment identifier of the TTI Bundling state, q is the codeword sequence number, and c init is the initial value of the scrambling code sequence used by the scrambling unit 902 to scramble the first data when the first data is transmitted.
在一些具体的实施中，该装置还包括：In some specific implementations, the apparatus further includes:
接收单元903，用于接收用户设备发送的能力上报消息，能力上报消息指示用户设备支持下行TTI Bundling；The receiving unit 903 is configured to receive a capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports the downlink TTI Bundling;
接收单元903，还用于接收用户设备发送的信道质量测量值；The receiving unit 903 is further configured to receive a channel quality measurement value sent by the user equipment;
判断单元901，还用于判断信道质量测量值是否低于信道质量预设值；The determining unit 901 is further configured to determine whether the channel quality measurement value is lower than a channel quality preset value;
装置还包括：The device also includes:
发送单元904，用于当确定信道质量测量值低于信道质量预设值时，则发送指示消息指示用户设备进入TTI Bundling状态；The sending unit 904 is configured to: when determining that the channel quality measurement value is lower than the channel quality preset value, send an indication message to indicate that the user equipment enters a TTI Bundling state;
判断单元901，具体用于当用户设备进入TTI Bundling状态时，确定小区中同时存在TTI Bundling状态的用户设备和传统Legacy状态的用户设备。The determining unit 901 is specifically configured to: when the user equipment enters the TTI Bundling state, determine the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state in the cell.
在一些具体的实施中，加扰单元902，还用于当确定小区中只存在TTI Bundling状态的用户设备时，对发送至TTI Bundling状态的用户设备的数据进行加扰，数据中包括重复发送的第二数据，每次发送第二数据时加扰单元所使用的扰码序列初始值相同。In some implementations, the scrambling unit 902 is further configured to: when determining that only the user equipment in the TTI Bundling state exists in the cell, the data of the user equipment sent to the TTI Bundling state is scrambled, where the data includes repeated sending. The second data has the same initial value of the scrambling code sequence used by the scrambling unit each time the second data is transmitted.
以上判断单元901、加扰单元902、接收单元903、发送单元904之间的信息交互请参考上述方法实施例(图4至图9所示的实施例)中描述对基站执行的步骤的描述，具体此处不再赘述。For information interaction between the above determining unit 901, the scrambling unit 902, the receiving unit 903, and the transmitting unit 904, refer to the description of the steps performed by the base station in the foregoing method embodiments (the embodiments shown in FIG. 4 to FIG. 9). This will not be repeated here.
如图11所示，从功能模块结构上来说，下行信道解扰装置包括：As shown in FIG. 11, from the functional module structure, the downlink channel descrambling device includes:
发送单元1001，用于向基站发送能力上报消息，能力上报消息指示用户设备支持下行TTI Bundling；The sending unit 1001 is configured to send a capability report message to the base station, where the capability report message indicates that the user equipment supports the downlink TTI Bundling;
接收单元1002，用于接收基站发送的进入TTI Bundling状态的指示消息；The receiving unit 1002 is configured to receive an indication message that is sent by the base station and enters a TTI Bundling state.
状态切换单元1003，用于根据指示消息进入TTI Bundling状态；The state switching unit 1003 is configured to enter a TTI Bundling state according to the indication message;
接收单元1002，还用于接收基站发送的多个第一数据；The receiving unit 1002 is further configured to receive multiple first data sent by the base station;
IQ合并单元1004，用于对多个第一数据进行同相和正交分量IQ数据合并；An IQ combining unit 1004, configured to perform in-phase and quadrature component IQ data combining on the plurality of first data;
解扰单元1005，用于确定TTI Bundling对应的扰码序列，使用TTI Bundling对应的扰码序列解扰合并后的第一数据。The descrambling unit 1005 is configured to determine a scrambling code sequence corresponding to the TTI Bundling, and descramble the combined first data by using a scrambling code sequence corresponding to the TTI Bundling.
在一些具体的实施中，发送单元1001还用于向基站发送信道质量测量值，该信道质量测量值用于基站根据该信道质量测量值确定是否指示用户设备进 入TTI Bundling状态。In some implementations, the sending unit 1001 is further configured to send, to the base station, a channel quality measurement value, where the channel quality measurement value is used by the base station to determine, according to the channel quality measurement value, whether the user equipment is indicated. Enter the TTI Bundling state.
以上发送单元1001、接收单元1002、状态切换单元1003、IQ合并单元1004、解扰单元1005之间的信息交互请参考上述方法实施例(图4至图9所示的实施例)中描述对用户设备执行的步骤的描述，具体此处不再赘述。For information interaction between the foregoing sending unit 1001, the receiving unit 1002, the state switching unit 1003, the IQ merging unit 1004, and the descrambling unit 1005, refer to the method embodiments described above (the embodiments shown in FIG. 4 to FIG. 9) for the user. The description of the steps performed by the device is not described here.
本发明实施例中的基站与用户设备的硬件结构示意图如图12所示，在本发明实施中的***中的用户设备和基站分别具有上述方法实施例中所述用户设备和基站所具备的功能。The hardware structure of the base station and the user equipment in the embodiment of the present invention is as shown in FIG. 12, and the user equipment and the base station in the system in the implementation of the present invention respectively have the functions of the user equipment and the base station in the foregoing method embodiment. .
用户设备通过链路和基站进行无线通信。基站提供用户设备到网络的无线接入，包括一个或多个处理器，一个或多个存储器，一个或多个网络接口，以及一个或多个收发器(每个收发器包括接收机Rx和发射机Tx)，通过总线连接。一个或多个收发器与天线或天线阵列连接。一个或多个处理器包括计算机程序代码。网络接口通过链路(例如与核心网之间的链路)与核心网连接，或者通过有线或无线链路与其它基站进行连接。处理器执行存储器中的一系列计算机程序代码指令操作，执行上述方法实施例中基站所执行全部或部分步骤，主要为：The user equipment performs wireless communication through the link and the base station. The base station provides wireless access of the user equipment to the network, including one or more processors, one or more memories, one or more network interfaces, and one or more transceivers (each transceiver including the receiver Rx and the transmitter) Machine Tx), connected via bus. One or more transceivers are coupled to the antenna or antenna array. The one or more processors include computer program code. The network interface is connected to the core network through a link (eg, a link to the core network) or to other base stations via a wired or wireless link. The processor executes a series of computer program code instructions in the memory to perform all or part of the steps performed by the base station in the foregoing method embodiments, mainly:
判断小区中是否同时存在传输时间间隔绑定TTI Bundling状态的用户设备和传统Legacy状态的用户设备，其中，TTI Bundling状态的用户设备为发送下行数据使用TTIBundling进行覆盖增强的用户设备，Legacy状态的用户设备为发送下行数据不使用TTIBundling进行覆盖增强的用户设备；于当确定同时存在TTI Bundling状态的用户设备和Legacy状态的用户设备时，则对发送至TTI Bundling状态的用户设备的数据与对发送至Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。Determining whether there is a user equipment in the TTI Bundling state and a user equipment in the legacy legacy state in the TTI Bundling state, where the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement on the downlink data, and the user in the Legacy state The device is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement; when determining that both the user equipment of the TTI Bundling state and the user equipment of the legacy state are present, the data and the pair of the user equipment sent to the TTI Bundling state are sent to The data of the user equipment in the Legacy state is scrambled separately using the scrambling code sequences generated by different initial values of the scrambling code sequence.
用户设备包括一个或多个处理器，一个或多个存储器，一个或多个收发器(每个收发器包括发射机Tx和接收机Rx)，通过总线相连接。一个或多个收发器与一个或多个天线连接。一个或多个存储器中包括计算机程序代码，处理器执行存储器中的一系列计算机程序代码指令操作，执行上述方法实施例中用户设备所执行的全部或部分步骤，主要为：The user equipment includes one or more processors, one or more memories, and one or more transceivers (each transceiver including a transmitter Tx and a receiver Rx) connected by a bus. One or more transceivers are coupled to one or more antennas. The computer program code is included in the one or more memories, and the processor executes a series of computer program code instructions in the memory to perform all or part of the steps performed by the user equipment in the foregoing method embodiments, mainly:
通过收发器向基站发送能力上报消息，能力上报消息指示用户设备支持下 行TTI Bundling，通过接收器接收基站发送的进入TTI Bundling状态的指示消息，并根据指示消息进入TTI Bundling状态；通过接收器接收基站发送的多个第一数据，之后，对多个第一数据进行同相和正交分量IQ数据合并，并确定TTI Bundling对应的扰码序列，使用TTI Bundling对应的扰码序列解扰合并后的第一数据。Sending a capability report message to the base station through the transceiver, and the capability report message indicates that the user equipment supports The TTI Bundling receives the indication message sent by the base station to enter the TTI Bundling state through the receiver, and enters the TTI Bundling state according to the indication message; receives the plurality of first data sent by the base station by using the receiver, and then performs the multiple first data by using the receiver. The in-phase and quadrature component IQ data are combined, and the scrambling code sequence corresponding to the TTI Bundling is determined, and the combined first data is descrambled using the scrambling code sequence corresponding to the TTI Bundling.
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、***、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present application and the above figures are used to distinguish similar objects, and are not necessarily used for Describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的***，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.
在本申请所提供的几个实施例中，应该理解到，所揭露的***，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方， 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, may be located in one place. Or it can be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。 The principles and embodiments of the present invention are described herein with reference to specific examples. The description of the above embodiments is only for the purpose of understanding the method of the present invention and the core idea thereof. Also, the present invention is based on the present invention. The present invention is not limited to the scope of the present invention.

Claims (22)

  1. 一种下行信道加扰方法，其特征在于，包括：A downlink channel scrambling method, comprising:
    基站判断小区中是否同时存在传输时间间隔绑定TTI Bundling状态的用户设备和传统Legacy状态的用户设备，其中，所述TTI Bundling状态的用户设备为发送下行数据使用TTIBundling进行覆盖增强的用户设备，所述Legacy状态的用户设备为发送下行数据不使用TTIBundling进行覆盖增强的用户设备；The base station determines whether there is a user equipment in the TTI Bundling state and a user equipment in the traditional legacy state in the TTI Bundling state, where the user equipment in the TTI Bundling state uses the TTiBundling to perform coverage enhancement on the downlink device. The user equipment in the legacy state is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement;
    若同时存在所述TTI Bundling状态的用户设备和所述Legacy状态的用户设备，则所述基站对发送至所述TTI Bundling状态的用户设备的数据与对发送至所述Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。If the user equipment in the TTI Bundling state and the user equipment in the Legacy state exist at the same time, the base station sends data to the user equipment sent to the TTI Bundling state and data to the user equipment sent to the Legacy state. Scrambling sequences generated using different scrambling sequence initial values are scrambled separately.
  2. 根据权利要求1所述的方法，其特征在于，The method of claim 1 wherein
    所述基站发送至所述TTI Bundling状态的用户设备的数据中包括重复发送的第一数据，每次发送所述第一数据所使用的扰码序列初始值相同。The data sent by the base station to the user equipment in the TTI Bundling state includes the first data repeatedly transmitted, and the initial value of the scrambling code sequence used each time the first data is sent is the same.
  3. 根据权利要求2所述的方法，其特征在于：The method of claim 2 wherein:
    首次发送所述第一数据所使用的扰码序列初始值与当前信道首次发送所述第一数据所在的时隙号相关，重复发送所述第一数据所使用的扰码序列初始值与所述首次发送所述第一数据所使用的扰码序列初始值相同。The initial value of the scrambling code sequence used for transmitting the first data for the first time is related to the slot number in which the current channel first transmits the first data, and the initial value of the scrambling code sequence used for repeatedly transmitting the first data is The initial value of the scrambling code sequence used to transmit the first data for the first time is the same.
  4. 根据权利要求2所述的方法，其特征在于：The method of claim 2 wherein:
    首次发送所述第一数据所使用的扰码序列初始值为根据加扰参数确定的扰码序列初始值，所述加扰参数不包括当前信道首次发送所述第一数据所在的时隙号，重复发送所述第一数据所使用的扰码序列初始值与所述首次发送所述第一数据所使用的扰码序列初始值相同。The initial value of the scrambling code sequence used for transmitting the first data for the first time is an initial value of the scrambling code sequence determined according to the scrambling parameter, and the scrambling parameter does not include the slot number in which the current channel first transmits the first data. The initial value of the scrambling code sequence used for repeatedly transmitting the first data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time.
  5. 根据权利要求4所述的方法，其特征在于：The method of claim 4 wherein:
    若发送所述第一数据的信道为PDCCH信道，则所述首次发送所述第一数据所使用的扰码序列初始值为根据公式
    Figure PCTCN2016107088-appb-100001
    计算的扰码序列初始值，其中，所述
    Figure PCTCN2016107088-appb-100002
    为所述小区的小区ID，cinit为发送所述第一数据所使用的扰码序列初始值。    If the channel that sends the first data is a PDCCH channel, the initial value of the scrambling code sequence used for transmitting the first data for the first time is according to a formula.
    Figure PCTCN2016107088-appb-100001
    Calculated initial value of the scrambling code sequence, wherein
    Figure PCTCN2016107088-appb-100002
    For the cell ID of the cell, c init is the initial value of the scrambling code sequence used to transmit the first data.
  6. 根据权利要求4所述的方法，其特征在于： The method of claim 4 wherein:
    若发送所述第一数据的信道为PDSCH信道，则所述首次发送所述第一数据所使用的扰码序列初始值为根据公式
    Figure PCTCN2016107088-appb-100003
    计算的扰码序列初始值，其中，所述
    Figure PCTCN2016107088-appb-100004
    为所述小区的小区ID，nRNTI为所述TTI Bundling状态的用户设备标识，q为码字序号，cinit为发送所述第一数据所使用的扰码序列初始值。    If the channel for transmitting the first data is a PDSCH channel, the initial value of the scrambling code sequence used for transmitting the first data for the first time is according to a formula
    Figure PCTCN2016107088-appb-100003
    Calculated initial value of the scrambling code sequence, wherein
    Figure PCTCN2016107088-appb-100004
    For the cell ID of the cell, n RNTI is the user equipment identifier of the TTI Bundling state, q is a codeword sequence number, and c init is an initial value of the scrambling code sequence used to send the first data.
  7. 根据权利要求4所述的方法，其特征在于：The method of claim 4 wherein:
    若发送所述第一数据的信道为EPDCCH信道，则所述首次发送所述第一数据所使用的扰码序列初始值为根据公式
    Figure PCTCN2016107088-appb-100005
    计算的扰码序列初始值，其中，所述
    Figure PCTCN2016107088-appb-100006
    为所述TTI Bundling状态的用户与EPDCCH加扰初始化参数。    If the channel that sends the first data is an EPDCCH channel, the initial value of the scrambling code sequence used for transmitting the first data for the first time is according to a formula.
    Figure PCTCN2016107088-appb-100005
    Calculated initial value of the scrambling code sequence, wherein
    Figure PCTCN2016107088-appb-100006
    The user and the EPDCCH are scrambled for the initialization parameter of the TTI Bundling state.
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述基站判断小区中是否同时存在TTI Bundling状态的用户设备和传统Legacy状态的用户设备包括：The method according to any one of claims 1 to 7, wherein the base station determines whether the user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both in the cell:
    所述基站接收用户设备发送的能力上报消息，所述能力上报消息指示所述用户设备支持下行TTI Bundling；Receiving, by the base station, a capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports downlink TTI Bundling;
    所述基站接收所述用户设备发送的信道质量测量值，若所述信道质量测量值低于信道质量预设值，则所述基站指示所述用户设备进入TTI Bundling状态，则所述基站确定所述小区中同时存在所述TTI Bundling状态的用户设备和传统Legacy状态的用户设备。Receiving, by the base station, a channel quality measurement value sent by the user equipment, if the channel quality measurement value is lower than a channel quality preset value, the base station instructs the user equipment to enter a TTI Bundling state, where the base station determines The user equipment in the TTI Bundling state and the user equipment in the legacy legacy state are both present in the cell.
  9. 根据权利要求1至7中任一项所述的方法，其特征在于，A method according to any one of claims 1 to 7, wherein
    若所述小区中只存在所述TTI Bundling状态的用户设备，则所述基站对发送至所述TTI Bundling状态的用户设备的数据进行加扰，所述数据中包括重复发送的第二数据，每次发送所述第二数据所使用的扰码序列初始值相同。If the user equipment in the TTI Bundling state exists in the cell, the base station scrambles data of the user equipment that is sent to the TTI Bundling state, where the data includes the second data that is repeatedly sent. The initial value of the scrambling code sequence used to transmit the second data is the same.
  10. 一种下行信道解扰方法，其特征在于，包括：A downlink channel descrambling method, comprising:
    用户设备向基站发送能力上报消息，所述能力上报消息指示所述用户设备支持下行TTI Bundling；The user equipment sends a capability report message to the base station, where the capability report message indicates that the user equipment supports the downlink TTI Bundling;
    所述用户设备接收所述基站发送的进入TTI Bundling状态的指示消息；Receiving, by the user equipment, an indication message that is sent by the base station to enter a TTI Bundling state;
    所述用户设备根据所述指示消息进入TTI Bundling状态；The user equipment enters a TTI Bundling state according to the indication message;
    所述用户设备接收所述基站发送的多个第一数据，对所述多个第一数据进 行同相和正交分量IQ数据合并；Receiving, by the user equipment, the plurality of first data sent by the base station, and entering the multiple first data Line in-phase and quadrature component IQ data are combined;
    所述用户设备确定TTI Bundling对应的扰码序列，使用所述TTI Bundling对应的扰码序列解扰合并后的所述第一数据。The user equipment determines a scrambling code sequence corresponding to the TTI Bundling, and descrambles the merged first data by using the scrambling code sequence corresponding to the TTI Bundling.
  11. 一种下行信道加扰装置，其特征在于，包括：A downlink channel scrambling device, comprising:
    判断单元，用于判断小区中是否同时存在传输时间间隔绑定TTI Bundling状态的用户设备和传统Legacy状态的用户设备，其中，所述TTI Bundling状态的用户设备为发送下行数据使用TTIBundling进行覆盖增强的用户设备，所述Legacy状态的用户设备为发送下行数据不使用TTIBundling进行覆盖增强的用户设备；The determining unit is configured to determine whether the user equipment in the TTI Bundling state and the user equipment in the traditional legacy state are present in the cell, where the user equipment in the TTI Bundling state uses TTiBundling to perform coverage enhancement for sending downlink data. a user equipment, where the user equipment in the legacy state is a user equipment that transmits downlink data without using TTiBundling for coverage enhancement;
    加扰单元，用于当确定同时存在所述TTI Bundling状态的用户设备和所述Legacy状态的用户设备时，对发送至所述TTI Bundling状态的用户设备的数据与对发送至所述Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。a scrambling unit, configured to: when it is determined that the user equipment in the TTI Bundling state and the user equipment in the Legacy state exist simultaneously, data and a pair sent to the user equipment of the TTI Bundling state are sent to the Legacy state The data of the user equipment is scrambled separately using the scrambling code sequences generated by different initial values of the scrambling code sequence.
  12. 根据权利要求11所述的装置，其特征在于，The device of claim 11 wherein:
    所述基站发送至所述TTI Bundling状态的用户设备的数据中包括重复发送的第一数据，每次发送所述第一数据时加扰单元加扰所述第一数据所使用的扰码序列初始值相同。The data sent by the base station to the user equipment in the TTI Bundling state includes the first data repeatedly transmitted, and the initial scrambling code sequence used by the scrambling unit to scramble the first data each time the first data is sent The values are the same.
  13. 根据权利要求12所述的装置，其特征在于：The device of claim 12 wherein:
    首次发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值与当前信道首次发送所述第一数据所在的时隙号相关，重复发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值与所述首次发送所述第一数据所使用的扰码序列初始值相同。When the first data is sent for the first time, the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data is related to the slot number in which the current channel first transmits the first data, and the method is repeatedly sent. The initial value of the scrambling code sequence used by the scrambling unit to scramble the first data is the same as the initial value of the scrambling code sequence used for transmitting the first data for the first time.
  14. 根据权利要求12所述的装置，其特征在于：The device of claim 12 wherein:
    首次发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值为根据加扰参数确定的扰码序列初始值，所述加扰参数不包括当前信道首次发送所述第一数据所在的时隙号，重复发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值与所述首次发送所述第一数据所使用的扰码序列初始值相同。The initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time is an initial value of the scrambling code sequence determined according to the scrambling parameter, and the scrambling parameter does not include the current channel. Sending, by the first time, the slot number where the first data is located, and repeating the first data, when the scrambling unit scrambles the initial value of the scrambling code sequence used by the first data, and the first sending the first The initial value of the scrambling code sequence used by the data is the same.
  15. 根据权利要求14所述的装置，其特征在于： The device of claim 14 wherein:
    若发送所述第一数据的信道为PDCCH信道，则所述首次发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值为根据公式
    Figure PCTCN2016107088-appb-100007
    计算的扰码序列初始值，其中，所述
    Figure PCTCN2016107088-appb-100008
    为所述小区的小区ID，cinit为发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值。    If the channel for transmitting the first data is a PDCCH channel, the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time is according to a formula
    Figure PCTCN2016107088-appb-100007
    Calculated initial value of the scrambling code sequence, wherein
    Figure PCTCN2016107088-appb-100008
    For the cell ID of the cell, c init is an initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent.
  16. 根据权利要求14所述的装置，其特征在于：The device of claim 14 wherein:
    若发送所述第一数据的信道为EPDCCH信道，则所述首次发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值为根据公式
    Figure PCTCN2016107088-appb-100009
    计算的扰码序列初始值，其中，所述
    Figure PCTCN2016107088-appb-100010
    为所述用户与EPDCCH加扰初始化参数，cinit为发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值。    If the channel that sends the first data is an EPDCCH channel, the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time is according to a formula
    Figure PCTCN2016107088-appb-100009
    Calculated initial value of the scrambling code sequence, wherein
    Figure PCTCN2016107088-appb-100010
    And scrambling an initialization parameter for the user and the EPDCCH, where c init is an initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent.
  17. 根据权利要求14所述的装置，其特征在于：The device of claim 14 wherein:
    若发送所述第一数据的信道为PDSCH信道，则所述首次发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值为根据公式
    Figure PCTCN2016107088-appb-100011
    计算的扰码序列初始值，其中，所述
    Figure PCTCN2016107088-appb-100012
    为所述小区的小区ID，nRNTI为所述TTI Bundling状态的用户设备标识，q为码字序号，cinit为发送所述第一数据时所述加扰单元加扰所述第一数据所使用的扰码序列初始值。    If the channel for transmitting the first data is a PDSCH channel, the initial value of the scrambling code sequence used by the scrambling unit to scramble the first data when the first data is sent for the first time is according to a formula
    Figure PCTCN2016107088-appb-100011
    Calculated initial value of the scrambling code sequence, wherein
    Figure PCTCN2016107088-appb-100012
    For the cell ID of the cell, the n RNTI is the user equipment identifier of the TTI Bundling state, q is a codeword sequence number, and c init is used by the scrambling unit to scramble the first data when the first data is sent. The initial value of the scrambling code sequence used.
  18. 根据权利要求11至17中任一项所述的装置，其特征在于，所述装置还包括：The device according to any one of claims 11 to 17, wherein the device further comprises:
    接收单元，用于接收用户设备发送的能力上报消息，所述能力上报消息指示所述用户设备支持下行TTI Bundling；a receiving unit, configured to receive a capability report message sent by the user equipment, where the capability report message indicates that the user equipment supports a downlink TTI Bundling;
    所述接收单元，还用于接收所述用户设备发送的信道质量测量值；The receiving unit is further configured to receive a channel quality measurement value sent by the user equipment;
    所述判断单元，还用于判断所述信道质量测量值是否低于信道质量预设值；The determining unit is further configured to determine whether the channel quality measurement value is lower than a channel quality preset value;
    所述装置还包括：The device also includes:
    发送单元，用于当确定所述信道质量测量值低于所述信道质量预设值时，则发送指示消息指示所述用户设备进入TTI Bundling状态；a sending unit, configured to: when the channel quality measurement value is lower than the channel quality preset value, send an indication message to indicate that the user equipment enters a TTI Bundling state;
    所述判断单元，具体用于当所述用户设备进入TTI Bundling状态时，确定 所述小区中同时存在所述TTI Bundling状态的用户设备和传统Legacy状态的用户设备。The determining unit is specifically configured to: when the user equipment enters a TTI Bundling state, determine The user equipment in the TTI Bundling state and the user equipment in the legacy Legacy state exist in the cell at the same time.
  19. 根据权利要求11至17中任一项所述的装置，其特征在于，Apparatus according to any one of claims 11 to 17, wherein
    所述加扰单元，还用于当确定所述小区中只存在所述TTI Bundling状态的用户设备时，对发送至所述TTI Bundling状态的用户设备的数据进行加扰，所述数据中包括重复发送的第二数据，每次发送所述第二数据时所述加扰单元所使用的扰码序列初始值相同。The scrambling unit is further configured to: when determining that only the user equipment in the TTI Bundling state exists in the cell, perform data scrambling on data sent by the user equipment in the TTI Bundling state, where the data includes a repetition The transmitted second data is the same as the initial value of the scrambling code sequence used by the scrambling unit each time the second data is transmitted.
  20. 一种下行信道解扰装置，其特征在于，包括：A downlink channel descrambling device, comprising:
    发送单元，用于向基站发送能力上报消息，所述能力上报消息指示所述用户设备支持下行TTI Bundling；a sending unit, configured to send a capability report message to the base station, where the capability report message indicates that the user equipment supports downlink TTI Bundling;
    接收单元，用于接收所述基站发送的进入TTI Bundling状态的指示消息；a receiving unit, configured to receive an indication message that is sent by the base station to enter a TTI Bundling state;
    状态切换单元，用于根据所述指示消息进入TTI Bundling状态；a state switching unit, configured to enter a TTI Bundling state according to the indication message;
    所述接收单元，还用于接收所述基站发送的多个第一数据；The receiving unit is further configured to receive a plurality of first data sent by the base station;
    IQ合并单元，用于对所述多个第一数据进行同相和正交分量IQ数据合并；An IQ combining unit, configured to perform in-phase and quadrature component IQ data combining on the plurality of first data;
    解扰单元，用于确定TTI Bundling对应的扰码序列，使用所述TTI Bundling对应的扰码序列解扰合并后的所述第一数据。And a descrambling unit, configured to determine a scrambling code sequence corresponding to the TTI Bundling, and descramble the combined first data by using the scrambling code sequence corresponding to the TTI Bundling.
  21. 一种基站，其特征在于，包括：A base station, comprising:
    相互连接的收发器、处理器及存储器；Interconnected transceivers, processors and memories;
    所述存储器用于存储程序代码，所述处理器调用所述存储器中的所述程序代码，以执行以下操作：The memory is for storing program code, and the processor calls the program code in the memory to perform the following operations:
    判断小区中是否同时存在传输时间间隔绑定TTI Bundling状态的用户设备和传统Legacy状态的用户设备，其中，所述TTI Bundling状态的用户设备为发送下行数据使用TTIBundling进行覆盖增强的用户设备，所述Legacy状态的用户设备为发送下行数据不使用TTIBundling进行覆盖增强的用户设备；于当确定同时存在所述TTI Bundling状态的用户设备和所述Legacy状态的用户设备时，则对发送至所述TTI Bundling状态的用户设备的数据与对发送至所述Legacy状态的用户设备的数据使用不同的扰码序列初始值生成的扰码序列分别进行加扰。Determining whether there is a user equipment in the TTI Bundling state and a user equipment in the traditional legacy state in the TTI Bundling state, where the user equipment in the TTI Bundling state uses TTiBundling to perform coverage enhancement on the downlink device. The user equipment of the Legacy state is a user equipment for transmitting downlink data without using TTiBundling for coverage enhancement; when it is determined that the user equipment of the TTI Bundling state and the user equipment of the Legacy state exist simultaneously, the pair is sent to the TTI Bundling The data of the user equipment in the state is scrambled separately with the scrambling code sequence generated by using the different scrambling code sequence initial values for the data of the user equipment transmitted to the legacy state.
  22. 一种用户设备，其特征在于，包括： A user equipment, comprising:
    相互连接的收发器、处理器及存储器；Interconnected transceivers, processors and memories;
    所述存储器用于存储程序代码，所述处理器调用所述存储器中的所述程序代码，以执行以下操作：The memory is for storing program code, and the processor calls the program code in the memory to perform the following operations:
    通过所述收发器向基站发送能力上报消息，所述能力上报消息指示所述用户设备支持下行TTI Bundling，通过所述接收器接收基站发送的进入TTI Bundling状态的指示消息，并根据所述指示消息进入TTI Bundling状态；Transmitting, by the transceiver, a capability report message to the base station, where the capability report message indicates that the user equipment supports a downlink TTI Bundling, and the receiver receives an indication message that is sent by the base station to enter a TTI Bundling state, and according to the indication message, Enter the TTI Bundling state;
    通过所述接收器接收所述基站发送的多个第一数据，之后，对所述多个第一数据进行同相和正交分量IQ数据合并，并确定TTI Bundling对应的扰码序列，使用所述TTI Bundling对应的扰码序列解扰合并后的所述第一数据。 Receiving, by the receiver, a plurality of first data sent by the base station, and then combining the in-phase and quadrature component IQ data on the plurality of first data, and determining a scrambling code sequence corresponding to the TTI Bundling, using the The scrambling code sequence corresponding to the TTI Bundling descrambles the combined first data.
PCT/CN2016/107088 2016-11-24 2016-11-24 Downlink channel scrambling and descrambling method and apparatus, and base station and user equipment WO2018094644A1 (en)

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US20140219368A1 (en) * 2013-01-31 2014-08-07 Apple Inc. Methods and apparatus for enabling and disabling scrambling of control symbols
CN104812057A (en) * 2014-01-29 2015-07-29 北京三星通信技术研究有限公司 Data transmission method and device of D2D system
CN105024778A (en) * 2014-04-16 2015-11-04 普天信息技术有限公司 Scrambling method of downlink channel

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CN103178883A (en) * 2011-12-26 2013-06-26 华为技术有限公司 Processing method, transmitting terminal and user terminal for physical downlink control channel data
US20140219368A1 (en) * 2013-01-31 2014-08-07 Apple Inc. Methods and apparatus for enabling and disabling scrambling of control symbols
CN104812057A (en) * 2014-01-29 2015-07-29 北京三星通信技术研究有限公司 Data transmission method and device of D2D system
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