WO2019028801A1 - 一种信号发送、接收方法及装置 - Google Patents
一种信号发送、接收方法及装置 Download PDFInfo
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- WO2019028801A1 WO2019028801A1 PCT/CN2017/096960 CN2017096960W WO2019028801A1 WO 2019028801 A1 WO2019028801 A1 WO 2019028801A1 CN 2017096960 W CN2017096960 W CN 2017096960W WO 2019028801 A1 WO2019028801 A1 WO 2019028801A1
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- uplink
- uplink subframe
- network device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/0012—Hopping in multicarrier systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
Definitions
- the present application relates to the field of wireless communications technologies, and in particular, to a signal transmitting and receiving method and apparatus.
- the 3rd Generation Partnership Project (3GPP) of the Mobile Communications Standardization Organization proposes the Narrowband Internet of Things (NB-IOT) technology.
- the device supporting NB-IoT has a bandwidth of 180 kHz when transmitting data, and supports operation in Standalone operation, Guardband operation, and In-band operation.
- the in-band mode refers to using one or more resource blocks in one carrier to transmit NB-IoT service data in a Long Term Evolution (LTE) system, where one resource block has a bandwidth of 180 kHz.
- LTE Long Term Evolution
- the NB-IOT technology is divided into time division duplex (TDD) NB-IoT and frequency division duplex (FDD) NB-IoT.
- TDD time division duplex
- FDD frequency division duplex
- a terminal device needs to access a base station by means of random access.
- the FDD NB-IoT the terminal device needs to transmit a random access preamble on a narrowband Physical Random Access Channel (NPRACH) channel.
- NPRACH Physical Random Access Channel
- a preamble is composed of one or more repeating units, and each repeating unit is composed of four sets of symbols, each of which has a length of at least 1.4 ms, that is, a continuous uplink resource occupied by one preamble has a length of at least 5.6 ms.
- the continuous uplink resource has a maximum length of only 3 subframes (ie, 3 ms), so the terminal device cannot send the preamble to the network device through 3 subframes.
- the terminal device in the TDD NB-IoT, how the terminal device sends the preamble is an urgent problem to be solved.
- the purpose of the embodiment of the present application is to provide a signal sending and receiving method and device, which are used to solve the problem that a terminal device cannot send a preamble in the TDD NB-IOT.
- an embodiment of the present application provides a signaling method, including:
- the terminal device generates a first symbol group that carries the first preamble; the first symbol group includes four groups of symbols;
- the terminal device sends the first symbol group to the network device by using the K group uplink subframe; any two uplink subframes in the K group uplink subframe are not adjacent, and each group in the K group uplink subframe
- the uplink subframe includes at least one uplink subframe, and the uplink subframe included in each group of uplink subframes is a continuous subframe, and K is a positive integer greater than 1 and less than or equal to 4.
- the terminal device sends the first preamble to the network device through the K group uplink subframe, so that the preamble is transmitted in the TDD NB-IoT by using the K group uplink subframe without changing the hardware structure of the terminal device. Even if the terminal device works in the in-band mode of the TDD NB-IoT, the terminal device can transmit the preamble by using the uplink resources dispersed in the uplink subframe of the K group, thereby maximally maintaining the structure of the existing preamble signal, so that the TDD is supported. /FDD NB-IoT's dual-mode terminal equipment can use the same set of transmitting devices to transmit preamble signals, reducing the cost of dual-mode terminal equipment that needs to support TDD/FDD NB-IoT.
- K is 2, and each group of uplink subframes in the K group uplink subframe is used to send two groups of symbols in the first symbol group.
- the first symbol group is sent through two sets of uplink subframes, and the sending week of the first preamble can be minimized. Period, thereby reducing the delay of the first preamble and improving the system.
- K is 4, and each group of uplink subframes in the K group uplink subframe is used to send one group of symbols in the first symbol group.
- the first symbol group carrying the first preamble is transmitted through the four uplink subframes, and the preamble transmission is completed on the premise of maintaining the structure of the existing preamble signal, so that the network device can be in the TDD NB-
- the preamble is transmitted under the IoT to improve the compatibility of the TDD NB-IoT and the TDD LTE system.
- the method further includes: the terminal device sends a second symbol group to the network device by using the K group uplink subframe; and the second symbol group is configured to carry a second preamble code.
- the terminal device reduces the influence of the frequency offset and the Doppler shift on the uplink synchronization performance by transmitting two preambles at the same time, and improves the uplink synchronization precision.
- a difference between an initial subcarrier number corresponding to the second preamble and an initial subcarrier number corresponding to the first preamble is a preset value.
- the second preamble is a preamble that is different from the first preamble randomly selected by the terminal device from the preamble set, where the preamble set includes at least two a preamble, where the preamble in the preamble set is configured for the network device.
- an embodiment of the present application provides a terminal device, where the terminal device includes a memory, a transceiver, and a processor, where: the memory is used to store an instruction; the processor is configured to perform, according to an instruction for executing the memory, and control the transceiver. Signal reception and signal transmission, when the processor executes an instruction stored in the memory, the terminal device is configured to perform the method in any of the possible aspects of the first aspect or the first aspect described above.
- the embodiment of the present application provides a terminal device, which is used to implement any one of the foregoing first aspect or the first aspect, including a corresponding functional module, for example, including a processing unit, a transceiver unit, a processing unit, and the like. Used to implement the steps in the above methods.
- an embodiment of the present application provides a computer readable storage medium, where the computer storage medium stores computer readable instructions, and when the computer reads and executes the computer readable instructions, causes the computer to execute the first Aspect or method of any of the possible aspects of the first aspect.
- the embodiment of the present application provides a computer program product, when the computer reads and executes the computer program product, causing the computer to perform the method in any one of the foregoing first aspect or the first aspect.
- an embodiment of the present application provides a chip, where the chip is connected to a memory, for reading and executing a software program stored in the memory, to implement any of the foregoing first aspect or the first aspect.
- the method in the design is not limited to:
- the embodiment of the present application provides a signal receiving method, including:
- the network device receives the first symbol group sent by the terminal device through the K group uplink subframe; any two uplink subframes in the K group uplink subframe are not adjacent, and the first symbol group is used to carry the first preamble
- the first symbol group includes four groups of symbols; each of the K groups of uplink subframes includes at least one uplink subframe, and the uplink subframes included in each group of uplink subframes are consecutive subframes.
- K is a positive integer greater than 1 and less than or equal to 4
- the network device sends a random access response to the terminal device.
- K is 2;
- Each group of uplink subframes in the K group uplink subframe is used to send two groups of symbols in the first symbol group.
- K is 4;
- Each group of uplink subframes in the K group uplink subframe is used to send one group of symbols in the first symbol group.
- the method further includes:
- the network device receives the second symbol group by using the K group uplink subframe; the second symbol group is configured to carry the second preamble.
- a difference between an initial subcarrier number corresponding to the second preamble and an initial subcarrier number corresponding to the first preamble is a preset value.
- the second preamble is a preamble that is different from the first preamble randomly selected by the terminal device from the preamble set, where the preamble set includes at least two a preamble, where the preamble in the preamble set is configured for the network device.
- an embodiment of the present application provides a network device, where the network device includes a memory, a transceiver, and a processor, where: the memory is used to store an instruction; the processor is configured to perform, according to an instruction to execute the memory storage, and control the transceiver. Signal reception and signal transmission, when the processor executes an instruction stored in the memory, the network device is operative to perform the method in any of the possible aspects of the seventh aspect or the seventh aspect described above.
- the ninth aspect the embodiment of the present application provides a network device, which is used to implement any one of the foregoing seventh or seventh aspects, including a corresponding functional module, for example, including a processing unit, a transceiver unit, a processing unit, and the like. Used to implement the steps in the above methods.
- the embodiment of the present application provides a computer readable storage medium, where the computer readable medium stores computer readable instructions, and when the computer reads and executes the computer readable instructions, causes the computer to execute the seventh Aspect or method of any of the possible aspects of the seventh aspect.
- the embodiment of the present application provides a computer program product, when the computer reads and executes the computer program product, causing the computer to perform the method in any one of the seventh aspect or the seventh aspect. .
- the embodiment of the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, to implement any one of the seventh aspect or the seventh aspect. Possible methods in design.
- FIG. 1 is a schematic diagram showing a system architecture applicable to an embodiment of the present application
- FIG. 2 is a schematic diagram of a bandwidth provided by an embodiment of the present application.
- FIG. 3 is a schematic diagram of a bandwidth provided by an embodiment of the present application.
- FIG. 4 is a schematic flowchart of a signal sending method according to an embodiment of the present application.
- FIG. 5 is a schematic diagram of a symbol provided by an embodiment of the present application.
- FIG. 6 is a schematic diagram of sending a preamble according to an embodiment of the present application.
- FIG. 7 is a schematic diagram of sending a preamble according to an embodiment of the present application.
- FIG. 8 is a schematic diagram of sending a preamble according to an embodiment of the present application.
- FIG. 9 is a schematic diagram of a preamble frequency hopping according to an embodiment of the present disclosure.
- FIG. 10 is a schematic diagram of sending a preamble according to an embodiment of the present application.
- FIG. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
- FIG. 12 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
- FIG. 13 is a schematic structural diagram of a network device according to an embodiment of the present application.
- FIG. 14 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
- NR New Radio
- GSM Global System of Mobile communication
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- LTE-A Advanced Long Term Evolution
- UMTS Universal Mobile Telecommunication System
- eLTE Evolved Long Term Evolution
- FIG. 1 is a schematic diagram showing a system architecture applicable to the embodiment of the present application.
- the network device and the terminal device 1 to the terminal device 6 form a communication system, in which the network device sends The information is sent to one or more of the terminal devices 1 to 6 .
- the terminal device 4 to the terminal device 6 also constitute a communication system in which the terminal device 5 can transmit information to one or more of the terminal device 4 and the terminal device 6.
- the terminal device may communicate with the core network via the network device, where the terminal device may be a user equipment (User Equipment, UE), an access terminal device, a subscriber unit, a subscriber station, a mobile station, a mobile station, or a remote station. , a remote terminal device, a mobile device, a user terminal device, a terminal device, a wireless communication device, a user agent, or a user device.
- the access terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and a wireless device.
- SIP Session Initiation Protocol
- WLL Wireless Local Loop
- PDA Personal Digital Assistant
- a network device which may be referred to as a radio access network (RAN) device, is hereinafter collectively referred to as a network device, and is mainly responsible for providing a wireless connection for the terminal device and ensuring reliable transmission of uplink and downlink data of the terminal device.
- the network device can be a gNB (generation Node B) in a 5G system, and can be a Global System of Mobile communication (GSM) system or a base station in Code Division Multiple Access (CDMA) (Base Transceiver Station).
- GSM Global System of Mobile communication
- CDMA Code Division Multiple Access
- BTS may also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or may be an evolved base station in a Long Term Evolution (LTE) system ( Evolutional Node B, eNB or eNodeB), etc.
- NodeB Node B
- WCDMA Wideband Code Division Multiple Access
- LTE Long Term Evolution
- the terminal device may work in any one of an independent mode, a guard band mode, and an in-band mode, and send a preamble to the network device in any one of the foregoing modes.
- the terminal device works in the independent mode
- one or more carriers in the GSM network can be used to transmit the NB-IoT service data, and the bandwidth of the independent carrier is 180 kHz.
- one or more resource blocks in one carrier in the LTE system may be used to transmit the NB-IoT service data, where the bandwidth of one resource block is 180 kHz. Specifically, it can be as shown in Figure 2.
- an LTE carrier may be divided into multiple resource blocks, each of which has a bandwidth of 180 kHz.
- the terminal device in the NB-IoT may use one or more resource blocks to transmit the NB-IoT service data.
- the NB-IoT service data can be transmitted by using the carrier protection band in the LTE system, wherein the bandwidth of the occupied guard band is 180 kHz. Specifically, it can be as shown in FIG. 3.
- the terminal device in the NB-IoT can transmit the NB-IoT service data using the protection bandwidth of the LTE carrier.
- FIG. 4 it is a schematic flowchart of a signal sending method provided by an embodiment of the present application.
- the method includes:
- Step 401 The terminal device generates a first symbol group that carries a first preamble, where the first symbol group includes four groups of symbols.
- Step 402 The terminal device sends the first symbol group to the network device by using the K group uplink subframe; any two uplink subframes in the K group uplink subframe are not adjacent, and each of the K group uplink subframes
- the group uplink subframe includes at least one uplink subframe, and the uplink subframe included in each group uplink subframe is a continuous subframe, and K is a positive integer greater than 1 and less than or equal to 4.
- any two sets of uplink subframes in the K group uplink subframe are not adjacent, that is, any two uplink subframes in the K group uplink subframe are discontinuous in time.
- Step 403 The network device receives the first symbol group sent by the terminal device through the K group uplink subframe.
- Step 404 The network device performs uplink synchronization measurement on the terminal according to the first preamble.
- the first preamble may be randomly selected by the terminal device from the available preamble, or may be a preamble specified by the network device for the terminal device, which is not limited in this embodiment of the present application.
- Each set of symbols in the first symbol group includes one cyclic prefix and five symbols, as shown in FIG. 5.
- the first part of a set of symbols is a cyclic prefix.
- the length of the cyclic prefix is 66.7 ⁇ s or 266.67 ⁇ s.
- the cyclic prefix is followed by 5 symbols for transmitting the preamble.
- the length of each symbol is 266.67 ⁇ s.
- Each preamble requires 4 sets of symbols.
- the meaning of the symbol includes, but is not limited to, Orthogonal Frequency Division Multiplexing (OFDM) symbol, Sparse Code Multiplexing Access (SCMA) symbol. Filtered Orthogonal Frequency Division Multiplexing (F-OFDM) symbols, non-Orthogonal Multiple Access (NOMA) symbols, etc., which can be determined according to actual conditions. Let me repeat.
- OFDM Orthogonal Frequency Division Multiplexing
- SCMA Sparse Code Multiplexing Access
- F-OFDM Filtered Orthogonal Frequency Division Multiplexing
- NOMA non-Orthogonal Multiple Access
- the K group uplink subframes may be located in the same radio frame.
- the K group uplink subframes may not be located in the same radio frame.
- each group of uplink subframes in the K group uplink subframe includes at least one uplink subframe, and the at least one uplink subframe is a continuous subframe.
- the consecutive subframes are consecutive in time from the first subframe to the last subframe.
- one radio frame includes 10 subframes, and the 10 subframes included in the radio frame are continuous in time. It is considered to be 10 consecutive subframes.
- the NB-IOT technology needs to be compatible with the LTE system. Therefore, the subframe used in the NB-IOT technology may refer to a subframe defined in the LTE system.
- the TDD LTE system has seven uplink-downlink configurations, which are uplink and downlink configuration 0 to uplink and downlink configuration 6, wherein the subframe used for transmitting the downlink signal is a downlink subframe, represented by D;
- the subframe of the uplink signal is an uplink subframe, denoted by U; and the downlink subframe and the uplink subframe are separated by a special subframe, which is denoted by S.
- the specific content of the seven uplink and downlink configurations can be referred to Table 1.
- each group of uplink subframes may include one uplink subframe, or include two consecutive uplink subframes, or include 3 consecutive uplink subframes.
- each group of uplink subframes in the K group uplink subframe is used to send at least one group of symbols in the first symbol group.
- a group of uplink subframes includes one uplink subframe in the uplink subframe of the K group, in order to enable the terminal device to send a group of symbols in the first symbol group in the group of uplink subframes, according to the subcarrier spacing and The length of the symbol is inversely proportional to increase the subcarrier spacing of the uplink subframe of the group, thereby reducing the length of the symbol, thereby implementing more symbols in the uplink subframe.
- the subcarrier spacing of the set of uplink subframes is adjusted from 15 kHz to 30 kHz, so that the number of symbols transmitted in each uplink subframe in the group of uplink subframes is increased from 14 to 28.
- the symbols in a group of symbols can also be split. For example, in a group of uplink subframes, only the first 4 symbols of a group of symbols in the first symbol group are transmitted, and the last symbol of the group of symbols is Another set of symbols is sent in another set of uplink subframes.
- the uplink subframe included in any one of the uplink subframes of the K group uplink subframe is composed of at least one uplink subframe included in the first 5 ms of one radio frame, or is composed of one At least one uplink subframe included in the last 5 ms of the radio frame is constructed.
- the uplink and downlink configuration type of the radio frame is the uplink and downlink configuration 0, and the uplink subframe in the first 5 ms of the radio frame is the subframe 2, the subframe 3, and the subframe 4; Any one of the uplink subframes in the frame, where the uplink subframe may be the subframe 2 in the radio frame, or the subframe 2 and the subframe 3 in the radio frame, or the subframe 2 in the radio frame Subframe 3 and subframe 4 are constructed.
- the uplink and downlink configuration type of the radio frame is the uplink and downlink configuration 1, and the uplink subframe in the last 5 ms of the radio frame is the subframe 7 and the subframe 8; and any group of the uplink subframes of the K group is uplinked.
- the subframe, the group of uplink subframes may be composed of subframes 7 in the radio frame, or may be composed of subframes 7 and 8 in the radio frame.
- K may be 2 or 3 or 4, which are respectively described below.
- each group of uplink subframes in the K group uplink subframe may be used to send two groups of symbols in the first symbol group, or a group of uplink subframes in the K group uplink subframe.
- the frame may be used to send three groups of symbols in the first symbol group, and another group of uplink subframes may be used to send one group of symbols in the first symbol group, thereby implementing sending by using the K group uplink subframe. 4 sets of symbols in the first symbol group.
- FIG. 6 a schematic diagram of preamble transmission provided by an embodiment of the present application is shown.
- the first symbol group carrying the first preamble includes a first group symbol, a second group symbol, a third group symbol, and a fourth group symbol.
- K is 2
- the K group uplink subframe includes the first group uplink subframe and the second group uplink subframe
- the K group uplink subframes may be located in the same radio frame
- each group of uplink subframes in the K group uplink subframes Includes 3 consecutive uplink subframes.
- the first group of uplink subframes in the K group uplink subframe is used to transmit the first group symbol and the second group symbol
- the second group uplink subframe in the K group uplink subframe is used to send the third group symbol , the fourth group of symbols.
- a preamble may be sent multiple times.
- the terminal device may repeatedly transmit the preamble multiple times according to the time length of one radio frame in the manner of FIG. 6.
- the second case: K is 3
- a group of uplink subframes in the K group uplink subframe may be used to send two groups of symbols in the first symbol group, and each group of uplink subframes in the remaining two uplink subframes may be used. Sending a set of symbols in the first symbol group.
- FIG. 7 a schematic diagram of preamble transmission provided by an embodiment of the present application.
- the first symbol group carrying the first preamble includes a first group symbol, a second group symbol, a third group symbol, and a fourth group symbol.
- K is 3
- the K group uplink subframe includes a first group uplink subframe, a second group uplink subframe, and a third group uplink subframe
- the K group uplink subframe is located in two radio frames
- Each group of uplink subframes includes three consecutive uplink subframes.
- the first group of uplink subframes in the K group uplink subframe is used to transmit the first group symbol and the second group symbol; and the second group uplink subframe in the K group uplink subframe is used to send the third group symbol The third group of uplink subframes in the K group uplink subframe is used to send the fourth group of symbols.
- a preamble may be sent multiple times.
- the terminal device may repeatedly transmit the preamble multiple times according to the time length of two radio frames in the manner of FIG. 7.
- the third case: K is 4
- each group of uplink subframes in the K group uplink subframe may be used to send one group of symbols in the first symbol group.
- FIG. 8 it is a schematic diagram of a preamble transmission provided by an embodiment of the present application.
- the first symbol group carrying the first preamble includes a first group symbol, a second group symbol, a third group symbol, and a fourth group symbol.
- K is 8
- the K group uplink subframe includes a first group uplink subframe, a second group uplink subframe, a third group uplink subframe, and a fourth group uplink subframe
- the K group uplink subframe is located in two radio frames.
- Each group of uplink subframes in the K group uplink subframe includes three consecutive uplink subframes.
- the first group of uplink subframes in the K group uplink subframe is used to send the first group of symbols; the second group uplink subframe in the K group uplink subframe is used to send the second group of symbols;
- the third group of uplink subframes in the uplink subframe is used to transmit the third group of symbols; and the fourth group of uplink subframes in the K group of uplink subframes is used to send the fourth group of symbols.
- a preamble may be sent multiple times.
- the terminal device may repeatedly transmit the preamble multiple times according to the time length of two radio frames in the manner of FIG. 8.
- FIG. 9 is a schematic diagram of a preamble frequency hopping provided by an embodiment of the present application.
- the four sets of symbols carrying the preamble are represented by gray-filled rectangles and numbers, and are recorded as 1, 2, 3, and 4 in chronological order.
- the preamble has two hopping intervals on the PRACH in one transmission period, which are 3.75 kHz and 22.5 kHz, respectively.
- the hopping interval is an integer multiple of the subcarrier bandwidth, and the minimum hopping interval and the subcarrier bandwidth are the same.
- the frequency hopping interval between the first group of symbols and the second group of symbols is 3.75 kHz
- the frequency hopping interval between the third group of symbols and the fourth group of symbols is 22.5 kHz
- the frequency hopping interval between the second set of symbols and the third set of symbols is 22.5 kHz.
- Pseudo-random frequency hopping is used between two adjacent transmission periods, and the frequency hopping range is limited to 12 sub-carriers.
- the terminal device may send multiple preambles at the same time.
- the terminal device may randomly select two preambles from the preamble set, and send the selected two preambles through the K group uplink subframe, where the subcarriers of the symbol group carrying each preamble are different.
- the terminal device may send the second symbol group to the network device by using the K group uplink subframe; the second symbol group is configured to carry the second preamble.
- the second symbol group also includes four sets of symbols. For details, refer to the description of the first symbol group, and details are not described herein again.
- the difference between the initial subcarrier number corresponding to the second preamble and the initial subcarrier number corresponding to the first preamble may be a preset value. Since the initial subcarrier number corresponding to each preamble can uniquely determine one preamble, after the terminal device determines the first preamble, the second preamble can be uniquely determined.
- the preset value may be determined according to actual conditions, and details are not described herein again.
- the second preamble may also be a preamble that is different from the first preamble that is randomly selected by the terminal device from the preamble set, where the preamble set includes at least two preambles, and the preamble in the preamble set Configuring the network device for the terminal device.
- the preamble in the preamble set may be a complete set of all optional preambles of the terminal device, or may be a subset of all preamble sets configured by the network device, such as: a preamble included in the preamble set.
- the code is that all the preambles whose difference between the initial subcarrier number corresponding to the preamble and the initial subcarrier number corresponding to the first preamble is not less than a preset threshold.
- FIG. 10 is a schematic diagram of a preamble transmission according to an embodiment of the present application.
- K is 2
- the K group uplink subframe includes the first group uplink subframe and the second group uplink subframe
- the K group uplink subframe may be located in the same radio frame
- the group uplink subframe includes three consecutive uplink subframes.
- the first symbol group carrying the first preamble includes a first group symbol, a second group symbol, a third group symbol, and a fourth group symbol.
- the first group of uplink subframes in the K group uplink subframe is used to send the first two groups of symbols in the first symbol group carrying the first preamble, and the first two in the second symbol group carrying the second preamble a group symbol;
- the second group uplink subframe in the K group uplink subframe is used to send the last two groups of symbols in the first symbol group carrying the first preamble, and in the second symbol group carrying the second preamble The last two sets of symbols.
- the symbols in the first symbol group and the symbols in the second symbol group are different in the subcarriers when transmitting.
- a preamble may be sent multiple times.
- the terminal device may repeatedly transmit the first preamble and the second preamble multiple times according to the time length of one radio frame in the manner of FIG.
- step 403 after the network device receives the first preamble sent by the terminal device, in step 404, the network device performs uplink synchronization measurement on the terminal device according to the first preamble, and the uplink synchronization measurement is specific.
- the content of the application is not limited in this embodiment. For example, the difference between the actual time when the signal sent by the terminal device reaches the network device and the time predicted by the network device may be measured, and the network device may thereby The terminal device is uplink synchronized.
- the network device may perform uplink synchronization measurement on the terminal device according to the second preamble, so as to implement uplink synchronization on the terminal by using two preambles, thereby reducing frequency offset and uplink synchronization performance. Influence, improve the accuracy of uplink synchronization.
- the terminal device may be used to perform the operations of the terminal device in the foregoing method embodiments.
- the terminal device 1100 includes: a processing unit 1101 and a transceiver unit 1102. .
- the processing unit 1101 is configured to generate a first symbol group that carries the first preamble; the first symbol group includes four groups of symbols;
- the transceiver unit 1102 is configured to send, by the K group uplink subframe, the first symbol group generated by the processing unit 1101 to the network device; any two uplink subframes in the K group uplink subframe are not adjacent.
- Each of the uplink subframes of the K-group uplink subframe includes at least one uplink subframe, and the uplink subframes included in each group of uplink subframes are consecutive subframes, and K is a positive integer greater than 1 and less than or equal to 4.
- K is 2;
- Each group of uplink subframes in the K group uplink subframe is used to send two groups of symbols in the first symbol group.
- K is 4;
- Each group of uplink subframes in the K group uplink subframe is used to send one group of symbols in the first symbol group.
- the transceiver unit 1102 is further configured to:
- the K group uplink subframe Transmitting, by the K group uplink subframe, a second symbol group to the network device; the second symbol group is configured to carry a second preamble.
- a difference between an initial subcarrier number corresponding to the second preamble and an initial subcarrier number corresponding to the first preamble is a preset value.
- the second preamble is a preamble that is different from the first preamble randomly selected by the terminal device from the preamble set, where the preamble set includes at least two a preamble, where the preamble in the preamble set is configured for the network device.
- the terminal device 1200 includes: a processor 1201 and a transceiver 1202.
- the processor 1201 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
- the processor 1201 may further include a hardware chip.
- the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
- the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.
- the memory 1203 may include a volatile memory such as a random-access memory (RAM); the memory may also include a non-volatile memory such as a flash memory.
- RAM random-access memory
- non-volatile memory such as a flash memory.
- HDD hard disk drive
- SSD solid-state drive
- the memory 1203 may also include a combination of the above types of memories.
- the communication interface 1204 can be a wired communication access port, a wireless communication interface, or a combination thereof, wherein the wired communication interface can be, for example, an Ethernet interface.
- the Ethernet interface can be an optical interface, an electrical interface, or a combination thereof.
- the wireless communication interface can be a WLAN interface.
- the bus 1205 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
- PCI peripheral component interconnect
- EISA extended industry standard architecture
- the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one double-headed arrow is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.
- the memory 1203 can be used to store program instructions, the processor 1201 invoking the program instructions stored in the memory 1203, can perform one or more of the steps in the above-described embodiments, or an optional implementation thereof, such that access
- the network node 1200 implements the functions in the above method.
- the processor 1201 is configured to generate a first symbol group that carries the first preamble; the first symbol group includes four groups of symbols;
- the transceiver 1202 is configured to send, by the K group uplink subframe, the first symbol group generated by the processor 1201 to the network device, where any two uplink subframes in the K group uplink subframe are not adjacent.
- Each of the uplink subframes of the K-group uplink subframe includes at least one uplink subframe, and the uplink subframes included in each group of uplink subframes are consecutive subframes, and K is a positive integer greater than 1 and less than or equal to 4. .
- K is 2;
- Each group of uplink subframes in the K group uplink subframe is used to send two groups of symbols in the first symbol group.
- K is 4;
- Each group of uplink subframes in the K group uplink subframe is used to send one group of symbols in the first symbol group.
- the transceiver 1202 is further configured to:
- the K group uplink subframe Transmitting, by the K group uplink subframe, a second symbol group to the network device; the second symbol group is configured to carry a second preamble.
- a difference between an initial subcarrier number corresponding to the second preamble and an initial subcarrier number corresponding to the first preamble is a preset value.
- the second preamble is a preamble that is different from the first preamble randomly selected by the terminal device from the preamble set, where the preamble set includes at least two a preamble, where the preamble in the preamble set is configured for the network device.
- the network device may be configured to perform the operations of the network device in the foregoing method embodiments.
- the network device 1300 includes: a transceiver unit 1301 and a processing unit 1302. .
- the transceiver unit 1301 is configured to receive a first symbol group that is sent by the terminal device by using the K group uplink subframe; any two uplink subframes of the K group uplink subframe are not adjacent, and the first symbol group is used for carrying a first preamble, the first symbol group includes four groups of symbols; each of the K groups of uplink subframes includes at least one uplink subframe, and the uplink subframe included in each group of uplink subframes is For consecutive sub-frames, K is a positive integer greater than 1 and less than or equal to 4.
- the processing unit 1302 is configured to perform uplink synchronization measurement on the terminal according to the first preamble.
- K is 2;
- Each group of uplink subframes in the K group uplink subframe is used to send two groups of symbols in the first symbol group.
- K is 4;
- Each group of uplink subframes in the K group uplink subframe is used to send one group of symbols in the first symbol group.
- the transceiver unit 1301 is further configured to:
- the K group uplink subframe receives, by the K group uplink subframe, a second symbol group; the second symbol group is configured to carry a second preamble.
- a difference between an initial subcarrier number corresponding to the second preamble and an initial subcarrier number corresponding to the first preamble is a preset value.
- the second preamble is a preamble that is different from the first preamble randomly selected by the terminal device from the preamble set, where the preamble set includes at least two a preamble, where the preamble in the preamble set is configured for the network device.
- the network device may be used to perform the operations of the network device in the foregoing method embodiments.
- the network device 1400 includes: a processor 1401 and a transceiver 1402.
- the processor 1401, the transceiver 1402, the memory 1403, and the communication interface 1404 are connected to each other through the bus 1405.
- the memory 1403 can be used to store program instructions, and the processor 1401 calls the program instructions stored in the memory 1403 to execute:
- the transceiver 1402 is configured to receive a first symbol group that is sent by the terminal device by using the K group uplink subframe; any two uplink subframes in the K group uplink subframe are not adjacent, and the first symbol group is used to carry the first a preamble, the first symbol group includes 4 groups of symbols; each group of uplink subframes in the K group uplink subframe includes at least one uplink subframe, and each group uplink
- the uplink subframe included in the subframe is a continuous subframe, and K is a positive integer greater than 1 and less than or equal to 4.
- the processor 1401 performs uplink synchronization measurement on the terminal according to the first preamble.
- K is 2;
- Each group of uplink subframes in the K group uplink subframe is used to send two groups of symbols in the first symbol group.
- K is 4;
- Each group of uplink subframes in the K group uplink subframe is used to send one group of symbols in the first symbol group.
- the transceiver 1402 is further configured to:
- the K group uplink subframe receives, by the K group uplink subframe, a second symbol group; the second symbol group is configured to carry a second preamble.
- a difference between an initial subcarrier number corresponding to the second preamble and an initial subcarrier number corresponding to the first preamble is a preset value.
- the second preamble is a preamble that is different from the first preamble randomly selected by the terminal device from the preamble set, where the preamble set includes at least two a preamble, where the preamble in the preamble set is configured for the network device.
- each device embodiment may refer to related methods in the related method embodiments. Partial understanding.
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Claims (21)
- 一种信号发送方法,其特征在于,包括:终端设备生成承载第一前导码的第一符号组;所述第一符号组包括4组符号;所述终端设备通过K组上行子帧向网络设备发送所述第一符号组;所述K组上行子帧中的任意两组上行子帧不相邻,所述K组上行子帧中每组上行子帧包括至少一个上行子帧,且每组上行子帧中包括的上行子帧为连续的子帧,K为大于1且小于或等于4的正整数。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:所述终端设备通过所述K组上行子帧向所述网络设备发送第二符号组;所述第二符号组用于承载第二前导码。
- 根据权利要求2所述的方法,其特征在于,所述第二前导码对应的初始子载波号与所述第一前导码对应的初始子载波号的差值为预设值。
- 根据权利要求2所述的方法,其特征在于,所述第二前导码为所述终端设备从前导码集合中随机选择的一个与所述第一前导码不同的前导码,所述前导码集合中包括至少两个前导码,所述前导码集合中的前导码为所述网络设备配置给所述终端设备的。
- 一种信号接收方法,其特征在于,包括:网络设备接收终端设备通过K组上行子帧发送的第一符号组;所述K组上行子帧中的任意两组上行子帧不相邻,所述第一符号组用于承载第一前导码,所述第一符号组包括4组符号;所述K组上行子帧中的每组上行子帧包括至少一个上行子帧,且每组上行子帧中包括的上行子帧为连续的子帧,K为大于1且小于或等于4的正整数所述网络设备根据所述第一前导码对所述终端进行上行同步测量。
- 根据权利要求5所述的方法,其特征在于,所述方法还包括:所述网络设备通过所述K组上行子帧接收第二符号组;所述第二符号组用于承载第二前导码。
- 根据权利要求6所述的方法,其特征在于,所述第二前导码对应的初始子载波号与所述第一前导码对应的初始子载波号的差值为预设值。
- 根据权利要求6所述的方法,其特征在于,所述第二前导码为所述终端设备从前导码集合中随机选择的一个与所述第一前导码不同的前导码,所述前导码集合中包括至少两个前导码,所述前导码集合中的前导码为所述网络设备配置给所述终端设备的。
- 一种终端设备,其特征在于,包括:处理单元,用于生成承载第一前导码的第一符号组;所述第一符号组包括4组符号;收发单元,用于通过K组上行子帧向网络设备发送所述处理单元生成的所述第一符号组;所述K组上行子帧中的任意两组上行子帧不相邻,所述K组上行子帧中每组上行子帧包括至少一个上行子帧,且每组上行子帧中包括的上行子帧为连续的子帧,K为大于1且小于或等于4的正整数。
- 根据权利要求9所述的终端设备,其特征在于,所述收发单元还用于:通过所述K组上行子帧向所述网络设备发送第二符号组;所述第二符号组用于承载第二前导码。
- 根据权利要求10所述的终端设备,其特征在于,所述第二前导码对应的初始子载波号与所述第一前导码对应的初始子载波号的差值为预设值。
- 根据权利要求10所述的终端设备,其特征在于,所述第二前导码为所述终端设备从前导码集合中随机选择的一个与所述第一前导码不同的前导码,所述前导码集合中包括至少两个前导码,所述前导码集合中的前导码为所述网络设备配置给所述终端设备的。
- 一种网络设备,其特征在于,包括:收发单元,用于接收终端设备通过K组上行子帧发送的第一符号组;所述K组上行子帧中的任意两组上行子帧不相邻,所述第一符号组用于承载第一前导码,所述第一符号组包括4组符号;所述K组上行子帧中的每组上行子帧包括至少一个上行子帧,且每组上行子帧中包括的上行子帧为连续的子帧,K为大于1且小于或等于4的正整数处理单元,用于根据所述第一前导码对所述终端进行上行同步测量。
- 根据权利要求13所述的网络设备,其特征在于,所述收发单元还用于:通过所述K组上行子帧接收第二符号组;所述第二符号组用于承载第二前导码。
- 根据权利要求14所述的网络设备,其特征在于,所述第二前导码对应的初始子载波号与所述第一前导码对应的初始子载波号的差值为预设值。
- 根据权利要求14所述的网络设备,其特征在于,所述第二前导码为所述终端设备从前导码集合中随机选择的一个与所述第一前导码不同的前导码,所述前导码集合中包括至少两个前导码,所述前导码集合中的前导码为所述网络设备配置给所述终端设备的。
- 根据权利要求1至4任一权利要求所述的一种信号发送方法、权利要求5至8任一权利要求所述的一种信号接收方法、权利要求9至12任一权利要求所述的终端设备或者权利要求13至16任一权利要求所述的网络设备,其特征在于,K为2;所述K组上行子帧中的每组上行子帧用于发送所述第一符号组中的2组符号。
- 根据权利要求1至4任一权利要求所述的一种信号发送方法、权利要求5至8任一权利要求所述的一种信号接收方法、权利要求9至12任一权利要求所述的终端设备或者权利要求13至16任一权利要求所述的网络设备,其特征在于,K为4;所述K组上行子帧中的每组上行子帧用于发送所述第一符号组中的1组符号。
- 根据权利要求1至4任一权利要求所述的一种信号发送方法、权利要求5至8任一权利要求所述的一种信号接收方法、权利要求9至12任一权利要求所述的终端设备或者权利要求13至16任一权利要求所述的网络设备,其特征在于,所述K组上行子帧中的任意一组上行子帧中包括的上行子帧,是由一个无线帧的前5ms中包括的至少一个上行子帧构成,或者是由一个无线帧的后5ms中包括的至少一个上行子帧构成。
- 一种计算机可读存储介质,其特征在于,所述计算机存储介质中存储有计算机可读指令,当计算机读取并执行所述计算机可读指令时,使得计算机执行如权利要求1至4以及17至19任意一项所述的方法。
- 一种计算机可读存储介质,其特征在于,所述计算机存储介质中存储有计算机可读指令,当计算机读取并执行所述计算机可读指令时,使得计算机执行如权利要求5至8以及17至19任意一项所述的方法。
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CN110692209B (zh) | 2021-01-01 |
US20200187197A1 (en) | 2020-06-11 |
CN110692209A (zh) | 2020-01-14 |
EP3667960A1 (en) | 2020-06-17 |
JP2020530239A (ja) | 2020-10-15 |
EP3667960B1 (en) | 2023-04-05 |
BR112020002784A2 (pt) | 2020-07-28 |
EP3667960A4 (en) | 2020-10-28 |
US11382078B2 (en) | 2022-07-05 |
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