CN108282210B - Information sending method, receiving method and device - Google Patents

Information sending method, receiving method and device Download PDF

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CN108282210B
CN108282210B CN201710010592.9A CN201710010592A CN108282210B CN 108282210 B CN108282210 B CN 108282210B CN 201710010592 A CN201710010592 A CN 201710010592A CN 108282210 B CN108282210 B CN 108282210B
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information
port
transmission scheme
csi
reference signals
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CN108282210A (en
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刘鹍鹏
李雪茹
曲秉玉
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention relates to the technical field of communication, in particular to an information sending method, an information receiving method and an information sending device. The information sending method comprises the following steps: the terminal equipment receives data and reference signals from network side equipment, the reference signals comprise first reference signals, the first reference signals comprise first demodulation reference signals sent by at least two first ports, the first demodulation reference signals are demodulation reference signals of the data, and the terminal equipment receives the data according to a first transmission scheme; the terminal equipment sends first information to the network side equipment, the first information comprises a detection result of data and/or at least one CSI, each CSI is determined according to measurement of a reference signal, each CSI at least comprises one of port selection information and Channel Quality Indicator (CQI), and the port selection information is used for indicating at least one second port of the network side equipment. The information sending method, the information receiving method and the information sending device can improve the effectiveness of data transmission.

Description

Information sending method, receiving method and device
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to an information sending method, an information receiving method and an information sending device.
Background
Space Frequency Block Coding (SFBC) is a transmission method of transmit diversity, which uses two ports to transmit data in combination with alamouti coding. Because the channel changes of the two ports are independent, the SFBC can obtain two-order diversity gain and has stronger robustness to channel fading.
In a new generation mobile communication system (for example, 5G), beamforming technology is used to transmit information, and specifically, the method includes virtualizing into two ports by using multiple antennas and two precoding vectors, where the two ports correspond to two beams. The larger the number of antennas, the smaller the spatial angular range covered by the beam energy, i.e., the narrower the beam, the more concentrated the beam energy. The higher the receiving energy of the user equipment within the spatial angle range covered by the beam, the more beneficial the improvement of the data transmission performance. Combining the beam forming with the SFBC transmission mode, and evolving the SFBC into the SFBC with the beam forming: and the base station takes the two virtualized ports as two ports during SFBC transmission respectively and transmits data by using an SFBC transmission mode. Since the 5G system will communicate in higher frequency bands, the 5G system will use more antennas for beamforming in order to resist more severe fading of the high frequency band signals, and thus the beam may become narrower.
For example, when a base station and a User Equipment (UE) communicate in a high frequency band, the number of antennas configured on two virtualized ports on the base station side is greatly increased, and further, beams corresponding to the two ports are narrow, and therefore, the beams are also easily blocked. If the beam of one of the ports is blocked, the channel energy of the port is greatly reduced, which results in a great decrease in the signal-to-noise ratio of data detection, thereby easily causing data transmission failure. In the existing system, the user equipment feeds back an acknowledgement/negative acknowledgement (ACK/NACK) according to the detection result of the data, and informs the base station whether the data is correctly transmitted. The mechanism will cause the base station to continue to use the blocked port to send data, thereby causing the possibility that the retransmission of data and/or the transmission of new data cannot be correctly transmitted, and affecting the subsequent data transmission performance.
Disclosure of Invention
The embodiment of the invention provides an information sending method, an information receiving method and an information sending device, and aims to improve the effectiveness of data transmission. In order to solve the technical problem, the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application provides an information sending method, where the method includes: the terminal equipment receives data and reference signals from network side equipment, wherein the reference signals comprise first reference signals, the first reference signals comprise first demodulation reference signals sent by at least two first ports, the first demodulation reference signals are demodulation reference signals of the data, and the terminal equipment receives the data according to a first transmission scheme;
the terminal device sends first information to the network side device, the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement of the reference signal, each CSI at least includes one of port selection information and Channel Quality Indicator (CQI), and the port selection information is used for indicating at least one second port of the network side device.
In the method provided by the present aspect, the terminal device generates relevant CSI information according to data and a reference signal from the network side device, where the CSI information includes: the port selection information is used for recommending a new port, so that the network side equipment can be switched to the unblocked port in time, and the subsequent data transmission performance is improved.
In one possible design, the sending, by the terminal device, first information to the network-side device includes:
if the detection result is a negative response, the first information sent by the terminal equipment comprises the at least one CSI;
and if the detection result is an acknowledgement, the first information sent by the terminal equipment does not include the CSI.
In one possible design, the CSI further includes: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
In one possible design, the first transmission scheme may comprise a space-frequency block coding (SFBC) transmission scheme, and the second transmission scheme may comprise at least one of a SFBC transmission scheme and a closed-loop beamforming transmission scheme.
In one possible design, the method further includes:
and the terminal equipment determines the at least one CSI according to the comparison result of the received power of the first demodulation reference signal and a preset power.
In one possible design, determining the content of the at least one CSI according to the comparison result of the received power and a preset power includes:
if the received power of all the first demodulation reference signals is greater than or equal to a preset power, the second transmission scheme indicated by the indication information is the same as the first transmission scheme;
if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, the second transmission scheme indicated by the indication information is different from the first transmission scheme.
In one possible design, determining the content of the at least one CSI according to the comparison result of the received power and a preset power includes:
if the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second port selected by the port selection information comprises the first port;
if at least one of the received powers of the first demodulated first reference signals is less than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
In one possible design, if the reference signal further includes a second reference signal, the determining, by the terminal device, the first information according to the measurement result of the first reference signal includes:
and the terminal equipment determines at least one CSI in the first information according to the received power of the first reference signal and the second reference signal.
In one possible design, the second reference signal includes at least one of a measurement reference signal CSI-RS and a second demodulation reference signal, where the second reference signal is transmitted through at least one third port of the network side device.
In one possible design, the determining, by the terminal device, at least one CSI in the first information according to the received powers of the first reference signal and the second reference signal includes:
and if at least one of the received powers of the first demodulated signals is less than that of the second reference signal, at least one of the first ports does not include the second port selected by the port selection information in the at least one CSI.
In a second aspect, an embodiment of the present invention provides an information receiving method, where the method includes:
the method comprises the steps that network side equipment sends data and reference signals to terminal equipment, the reference signals comprise first reference signals, the first reference signals comprise first demodulation reference signals sent by at least two first ports, the first demodulation reference signals are demodulation reference signals of the data, and the terminal equipment receives the data according to a first transmission scheme;
the network side equipment receives first information sent by the terminal equipment, the first information comprises a detection result of the data and/or at least one Channel State Information (CSI), each CSI is determined according to the measurement of the reference signal, each CSI at least comprises one of port selection information and Channel Quality Indicator (CQI), and the port selection information is used for indicating at least one second port of the network side equipment.
In one possible design, the method further includes:
if the detection result is a negative response, the first information received by the network side equipment comprises the at least one CSI;
and if the detection result is an acknowledgement, the first information received by the network side equipment does not include the CSI.
In one possible design, the CSI further includes: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
In one possible design, the first transmission scheme may comprise a space-frequency block coding (SFBC) transmission scheme, and the second transmission scheme may comprise at least one of a SFBC transmission scheme and a closed-loop beamforming transmission scheme.
In one possible design, the indication information is used to indicate,
if the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second transmission scheme is the same as the first transmission scheme;
and if at least one of the receiving powers of the first demodulation reference signals sent by the at least two first ports is smaller than the preset power, the second transmission scheme is different from the first transmission scheme.
In a possible design, if the received power of all the first demodulation reference signals is greater than or equal to a preset power, the second port selected by the port selection information includes the first port;
and if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
In one possible design, the method further includes:
the reference signal further includes a second reference signal, the network side device sends the second reference signal to the terminal device through at least one third port, and the second reference signal includes at least one of a measurement reference signal CSI-RS and a second demodulation reference signal.
In one possible design, if at least one of the received powers of the first demodulated signal is less than the received power of the second reference signal, at least one of the first ports does not include the second port selected by the port selection information in the at least one CSI.
In a third aspect, in order to implement the information sending method of the first aspect, an embodiment of the present invention provides an information sending apparatus, where the information sending apparatus has a function of implementing a terminal device behavior in the information sending method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.
In one possible design, the information transmitting apparatus includes: a receiving unit and a transmitting unit; the receiving unit is configured to receive data and reference signals from a network side device, where the reference signals include first reference signals, the first reference signals include first demodulation reference signals sent by at least two first ports, and the first demodulation reference signals are demodulation reference signals of the data, and the receiving unit is further configured to receive the data according to a first transmission scheme; a sending unit, configured to send first information to the network side device, where the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement on the reference signal, each CSI includes at least one of port selection information and a CQI, and the port selection information is used to indicate at least one second port of the network side device.
In one possible design, the apparatus further includes a processing unit configured to determine the at least one CSI according to a comparison result between a received power of the first demodulation reference signal and a preset power.
In a possible design, the sending unit is further configured to perform the relevant sending action performed by the terminal device in the first aspect, the receiving unit is further configured to perform the relevant receiving action pointed to by the terminal device in the first aspect, and the processing unit is further configured to perform the relevant processing action performed by the terminal device in the first aspect on the signals and data.
In one possible design, the information sending apparatus includes a processor configured to support the information sending apparatus to perform the functions performed by the processing unit in the third aspect, and a transceiver configured to perform the functions performed by the receiving unit and the sending unit in the third aspect. Also included in the information delivery device is a memory, coupled to the processor, that retains program instructions and data necessary for the information delivery device.
In a fourth aspect, in order to implement the information receiving method of the second aspect, an embodiment of the present invention provides an information receiving apparatus, where the information receiving apparatus has a function of implementing a behavior of a network-side device in the information receiving method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.
In one possible design, the information receiving apparatus includes: a transmitting unit and a receiving unit, wherein:
a sending unit, configured to send data and reference signals, where the reference signals include first reference signals, the first reference signals include first demodulation reference signals sent by at least two first ports, and the first demodulation reference signals are demodulation reference signals of the data, and the sending unit is further configured to receive the data according to a first transmission scheme;
a receiving unit, configured to receive first information, where the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement on the reference signal, each CSI includes at least one of port selection information and a CQI, and the port selection information is used to indicate at least one second port of a network side device.
In one possible design, the device further comprises a processing unit,
the processing unit is configured to determine that, if the detection result is a negative response, the first information received by the network side device includes the at least one CSI; and if the detection result is an acknowledgement, the first information received by the network side equipment does not include the CSI.
In a possible design, the sending unit is further configured to perform the relevant sending action performed by the network-side device in the second aspect, the receiving unit is further configured to perform the relevant receiving action performed by the network-side device in the second aspect, and the processing unit is further configured to perform the relevant processing action on the signal and the data performed by the network-side device in the second aspect.
In one possible design, the information receiving apparatus includes a processor configured to support the information receiving apparatus to perform the functions performed by the processing unit in the fourth aspect, and a transceiver configured to perform the functions performed by the receiving unit and the transmitting unit in the fourth aspect. Also included in the information receiving device is a memory for coupling with the processor that holds program instructions and data necessary for the information receiving device.
In a fifth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the information sending apparatus, which includes a program designed to execute the above aspects.
In a sixth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the information receiving apparatus, which includes a program designed to execute the above aspects.
In summary, the information sending method, the information receiving method and the information sending device provided by the embodiments of the present invention can improve the effectiveness of data transmission.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of an information sending method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a terminal device receiving a reference signal according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another terminal device receiving a reference signal according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of an information receiving method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another information sending apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another information receiving apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions of the embodiments of the present application are described in further detail below with reference to the accompanying drawings and embodiments.
The method provided by each embodiment of the present application is applied to a Wireless Local Area Network (WLAN), and specifically, the method may be applied to a Long Term Evolution (LTE) system or a Wireless communication system that employs Wireless access technologies such as code division multiple access (cdma) and orthogonal frequency division multiple access (ofdma). Furthermore, the method can also be applied to a subsequent evolution system using an LTE system, such as a fifth generation (5G) system or a New Radio (NR) system.
The system comprises at least one network side device and at least one terminal device. The network side device may be an Access Point (AP), and may also be other network devices, for example, a base station, an enhanced base station, or a relay with a scheduling function, or a device with a base station function. The base station may be an evolved Node B (eNB) in the LTE system, or may be a base station in another system.
The terminal equipment may be mobile terminals such as mobile telephones (or so-called "cellular" telephones) and computers with mobile terminals, for example portable, pocket, hand-held, computer-included or car-mounted mobile devices, which exchange language and/or data with the radio access network. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. The terminal device may also be a Subscriber Unit (SU), a Subscriber Station (SS), a Mobile Station (MS), a Remote Station (RS), a Remote Terminal (RT), an Access Terminal (AT), a User Terminal (UT), a User Agent (UA), a User Equipment (UE), or a User Equipment (UE). The embodiments of the present application are not limited.
The embodiment of the application provides an information sending method, which is used for enabling a terminal device to detect whether an SFBC port of a network side device is shielded or not in real time and reporting feedback related information so as to improve the transmission performance of data.
As shown in fig. 1, the information sending method includes the following steps:
step 101, the terminal equipment receives data and reference signals from the network side equipment.
The reference signal comprises a first reference signal, the first reference signal comprises a first demodulation reference signal sent by at least two first ports, the first demodulation reference signal is a demodulation reference signal of the data, and the terminal equipment receives the data according to a first transmission scheme; the first modulation reference signal is dmrs (modulation reference signal).
Step 102: and the terminal equipment sends the first information to the network side equipment.
The first information includes a detection result of the data and/or at least one Channel State Information (CSI), each CSI is determined according to measurement on the reference signal, each CSI includes at least one of port selection information and a Channel Quality Indicator (CQI), the port selection information is used for indicating at least one second port of the network side device, and the CQI may be calculated according to the port selection information.
Further, the CSI further includes: at least one of indication information, port quality information, and PMI information, where the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data; the port quality information is used for representing the quality of the at least two first ports; the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
The first transmission scheme comprises a Space Frequency Block Coding (SFBC) transmission scheme, and the second transmission scheme comprises at least one of an SFBC transmission scheme and a closed-loop beamforming transmission scheme. Specifically, whether the second transmission scheme adopts the SFBC transmission scheme or the closed-loop beamforming transmission scheme may be determined according to a measurement result of the terminal device on the received power of the reference signal.
In an SFBC transmission mode, in addition to data detection, a first demodulation reference signal DMRS is measured to obtain energy information of a port, whether the port is blocked is determined according to the energy information, and a transmission scheme (including at least SFBC and closed loop beamforming) for next transmission and/or port selection are recommended, and/or corresponding Precoding Matrix Indicator (PMI) and Channel Quality Indicator (CQI) are/is reported, or port selection information, and/or PMI, and/or CQI of multiple alternative transmission schemes are reported, so that a network side device can make a decision.
The terminal device may recommend a transmission scheme for the next transmission to the network side device, and may also report port selection information, and/or PMI, and/or CQI of a plurality of alternative transmission schemes to the network side device for the network side device to make a decision.
A method for reporting first information by a terminal device comprises:
the terminal equipment receives data and a first demodulation reference signal (DMRS) sent by network side equipment. The first demodulation reference signal may be sent through two first ports, for example, a port a and a port b, of the network side device. The first DMRS is used to estimate the downlink channel of the two first ports (port a and port b) of the SFBC to the terminal device (e.g., UE), so that the UE can demodulate the data on the two ports.
The selection of the first ports a and b may be determined by the network side device according to previous CSI feedback of the UE (e.g., CSI feedback based on the current transmission data and CSI-RS sent before the DMRS). For example, the base station confirms to use the precoding vector v according to the PMI reported by the UE beforea,vbAnd forming a port a and a port b, and using the port a and the port b as two ports of the SFBC. At subcarrier f1,f2In the above, let the downlink channel coefficients from port a and port b to the UE be h respectivelya,hbThen the downlink channel coefficient ha,hbA downlink channel matrix H from the base station to the UE and two port precoding vectors va,vbThe product of (a). Let the data symbol to be transmitted on the two subcarriers be s1,s2Then the UE is in subcarrier f1,f2Received data symbols of
Figure BDA0001204718820000071
Wherein n is1,n2Indicating that the receiver of the UE is on subcarrier f1,f2Receive noise of (2).
Optionally, if the reference signal further includes a second reference signal, the terminal device determines the first information according to a measurement result of the first reference signal, which specifically includes: and the terminal equipment determines at least one CSI in the first information according to the receiving power of the first reference signal and the second reference signal, and obtains a channel coefficient of at least one second port.
Wherein the second reference signal comprises at least one of a measurement reference signal CSI-RS and a second demodulation reference signal DMRS, wherein the second reference signal is transmitted through at least one third port of the network side device.
Specifically, the process of the terminal device determining at least one CSI according to the received powers of the first reference signal and the second reference signal is as follows: the UE measures the first DMRS of the two first ports to obtain the channel estimation values of the two first ports
Figure BDA0001204718820000081
UE according to channel energy of 2 first ports
Figure BDA0001204718820000082
The UE judges whether the first port is shielded. For example, if the channel energy of the port a is reduced by about 20dB compared to the previous subframe, or is lower than a certain threshold, the UE may consider that the channel of the port a is blocked. Or the UE measures the received power P of the first DMRS of the two first ports1And P2By judging P1And P2Whether the first port is blocked is judged according to whether the first port is lower than a threshold value or whether the first port is 20dB lower than the received power of the last subframe. And generating CSI by the UE according to the detection quality information of the two first ports, wherein the CSI comprises at least one of port quality information, port selection information, recommended second transmission scheme, used PMI and corresponding CQI. The second transmission scheme is a transmission scheme recommended by the UE for next data transmission, and the port quality information informs the quality of the port a and the port b of the base station, such as whether the port a and the port b are blocked. The port selection information is used to inform the base station of a second port label for data transmission of the second transmission scheme. The precoding matrix indicated by the PMI is used for a precoding matrix of the second transmission scheme.
Optionally, the UE may report a part of the port quality, the recommended transmission scheme, the port selection, the PMI, and the corresponding CQI. Optionally, the UE may perform CSI feedback according to the following table.
Figure BDA0001204718820000083
TABLE 1
In table 1, Y indicates that the port is not occluded and N indicates that the port is occluded.
The rule that the UE generates the feedback CSI according to the detected received power of the port a and the port b is as follows:
if the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second transmission scheme indicated by the indication information is the same as the first transmission scheme; and if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, the second transmission scheme indicated by the indication information is different from the first transmission scheme.
If the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second port selected by the port selection information comprises the first port; if at least one of the received powers of the first demodulated first reference signals is less than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
Alternatively, in table 1, the selection of the ports c and d may be obtained from the measurement of the second reference signal. PMIc is a precoding matrix indication of the UE for the closed-loop beamforming transmission scheme and the port c, and is used to indicate a precoding vector used by the base station when the closed-loop beamforming is used to transmit data, and may also be obtained according to measurement of the second reference signal. Because the receiving energy of the port b is too low, the UE needs to recommend the base station to switch to a new port c for subsequent transmission, and/or the precoding matrix indicator PMI is used for indicating the precoding matrix of the base station for subsequent data transmission. Similarly, PMId has similar meaning. Optionally, the "UE feedback CSI" in table 1 may only include a part of the above parameters, for example, include the second transmission scheme, the port selection, and the CQI, or include other situations such as the second transmission scheme, the PMI, and the CQI.
In addition, the terminal device may recommend the base station to continue using the first transmission scheme according to the received power of the reference signal, for example, as shown in table 2.
Figure BDA0001204718820000091
TABLE 2
Table 2 differs from table 1 in that if one port on the network side is blocked, the UE may recommend the transmission scheme that continues to adopt SFBC, but the CSI includes a recommended new port. On one hand, if two ports (for example, a port a and a port b) of the SFBC adopt different precoding vectors, and the beam directions corresponding to the two ports are different, the probability that two beams are simultaneously blocked is reduced, and the robustness against beam blocking is strong; on the other hand, the closed-loop beamforming scheme has higher closed-loop beamforming gain and higher data detection signal-to-noise ratio, and has better data detection performance under the condition that the beam is not shielded.
Further, whether the content in table 2 or table 1 is adopted in the CSI reported by the UE may be determined by the UE. For example, according to the data and the reference signal measurement before the DMRS is transmitted, the UE knows whether other ports, except for the ports a and b, can better complete data transmission. For example, port b is blocked, if port c) is a suboptimal port except for port a and port b, but can still serve SFBC data transmission well (e.g., the signal-to-noise ratio for data detection exceeds a threshold), the UE may recommend to continue using SFBC, but update ports a and c; or the UE directly recommends the precoding indication PMIac of the next transmission. If the UE determines that there are no other ports meeting the requirements except for the port a and the port b, or the UE directly determines to adopt the closed-loop beamforming scheme, the UE may recommend that the base station switches to the transmission scheme of closed-loop beamforming, and recommend that the current port is c, or directly recommend that the PMI is PMIc.
Optionally, the UE may also perform calculation according to table 1 and table 2, and obtain CQI of closed-loop beamforming in table 1 as CQI _1 and CQI of SFBC in table 2 as CQI _2, respectively, and the UE may select a transmission scheme corresponding to a larger CQI and a corresponding PMI to report. Optionally, the network side device at the receiving end may use the CSI in table 2 for subsequent data transmission, may also use the content transmission in table 1, or does not use table 1 and table 2 for performing procedure data transmission according to other network information, and which transmission scheme is specifically used may be determined by the network side device itself.
Optionally, for each CSI reporting situation, the UE may also report two sets of CSI based on SFBC and closed-loop beamforming, and the base station determines which transmission scheme to use.
In the information sending method provided in this embodiment, the terminal device generates the relevant CSI information according to the data and the reference signal detected in real time from the network side device, where the CSI information includes: the port selection information is used for recommending a new port, so that the network side equipment can be switched to an unblocked port and a better transmission scheme in time, and the subsequent data transmission performance is improved.
In another embodiment of the present application, the terminal device further determines, according to a detection result of the data, information such as at least one CSI that is reported, where the specific process includes:
the reference signal sent by the network side device to the terminal device further includes a second reference signal. The second reference signal may be a measurement reference signal CSI-RS sent by the network side device to the UE (e.g., UE1 in fig. 3), and/or a demodulation reference signal DMRS sent by the network side device to other UEs (e.g., UE2 and UE3 in fig. 2). As shown in fig. 2 and fig. 3, the network side device sends the second reference signal through at least one third port, and instructs the UE1 to measure the second reference signal through signaling, so that the UE1 can obtain channel qualities, such as received power, of ports other than the two first ports. By comparing the received power of the first reference signal and the second reference signal, the UE1 can know the port with better channel quality for subsequent data transmission, and thus can recommend the base station for port switching, thereby improving the performance of subsequent data transmission.
For example, the network side device instructs the UE1 to measure the received powers of the DMRSs of the third port c and d of the UE2 and the third port e and f of the UE3 through signaling, and instructs the time-frequency resource location of the DMRS of the third port of the UE1 through signaling. The UE1 measures the DMRS received power of the third port according to the signaling indication, in addition to the DMRS received power of the first ports a and b. Comparing the received power of the DMRSs of the two ports a and b and the DMRS received power of the third port, it is found that the received power of the third port c of the UE2 is higher than the structure of the first port a, and then the port selection information in the at least one CSI generated by the UE1 is port a and port c, the second transmission scheme is SFBC, and corresponding PMIac and CQI. Alternatively, the UE1 may also determine whether it should switch to closed loop beamforming from the SFBC transmission scheme. If a handover is required, the port selection information in the at least one CSI generated by the UE1 is port a, and the second transmission scheme is closed-loop beamforming. Or the UE1 may report port selection information and a second transmission scheme based on SFBC and closed-loop beamforming, respectively, for the network side device to make a decision. Since the beam for transmitting the DMRS of the third port by the network side device is different from the beam for transmitting the DMRS of the first port, when the first port is blocked, the beam of the third port may not be blocked. By measuring the receiving power of the second reference signal, the UE can obtain a port with better channel quality and report the port to the network side device, thereby improving the performance of subsequent data transmission.
For example, the network side device instructs the UE1 to measure 4 CSI-RSs sent by the third ports c, d, e, f through signaling, where each third port corresponds to a beam direction, that is, the CSI-RS sent by one third port is sent out through the beam direction corresponding to the port. The UE1 may determine to obtain a port with better channel quality by measuring the received power of the CSI-RS on each third port and comparing the measured received power with the received power of the DMRS on the first port, and report the port to the network side device. Since the beam for transmitting the third port CSI-RS by the network side device is different from the beam for transmitting the DMRS of the first port, when the first port is blocked, the beam of the third port may not be blocked. By measuring the receiving power of the second reference signal, the UE can report the port with better channel quality to the network side device, thereby improving the performance of subsequent data transmission. Optionally, the CSI-RS transmitted by the third port may be a periodic CSI-RS, an aperiodic CSI-RS, or a semi-persistent CSI-RS. Optionally, the subcarrier spacing used when the network side device sends the CSI-RS of the third port may be different from the subcarrier spacing used when the two DMRSs of the first port are sent. For example, a subcarrier spacing of 15KHz is used when the first DMRS is transmitted, and a subcarrier spacing of 60KHz is used when the CSI-RS is transmitted. When the 4 CSI-RSs are sent by analog beamforming, the time length occupied by the 4 CSI-RS symbols is the same as the time length occupied by one symbol for sending the DMRS of the first port, so that the UE can measure the receiving power of the multiple CSI-RS ports in the same time, and the rapid quality measurement of the multiple third ports is realized.
In the embodiment of the invention, after the UE receives data from the network side device, for example, after the UE receives data sent by the base station according to SFBC, the UE measures DMRSs of two first ports to obtain channel estimation values of the two first ports
Figure BDA0001204718820000111
And detects data symbols using the channel estimation values. And recommending the content of the reported first information according to the detection result of the data, such as CRC (cyclic redundancy check) of the data. If the data is correctly received, the UE feeds back an Acknowledgement (ACK) message to the base station aiming at the data transmission; if the data is not correctly received, the UE feeds back a Negative Acknowledgement (NACK) message to the base station aiming at the data transmission.
And the UE arouses whether to report at least one CSI or not according to whether ACK or NACK is to be fed back and whether at least two first ports on the network side are shielded. And if at least one CSI is reported, the CSI comprises port quality information, port selection information, a recommended second transmission scheme, a used PMI and a corresponding CQI. Wherein, the second transmission scheme is the next data transmission recommended by the UE to use the transmission scheme, and the port quality informs the quality of the port a and the port b of the base station, for example, whether the port a and the port b are blocked. The port selection information informs the base station of a second port label for data transmission of the second transmission scheme. The precoding matrix indicated by the PMI is used for a precoding matrix of the second transmission scheme.
Optionally, the UE may report a part of the port quality, the recommended transmission scheme, the port selection, the PMI, and the corresponding CQI.
Specifically, if the UE wants to feed back NACK (that is, data is not correctly received), the UE reports CSI according to the shielding condition of the port. If the UE feeds back ACK (i.e. data is correctly received), the UE does not report CSI. Optionally, if the UE needs to report the CSI, the CSI feedback may be performed according to the following table 3 (Y indicates that the port is not blocked, N indicates that the port is blocked)
Figure BDA0001204718820000121
TABLE 3
Optionally, in table 3, the selection of the port c may be obtained according to measurement of other reference signals, for example, based on measurement of the current data and the reference signal before the first DMRS is transmitted, or measurement of the second reference signal in the foregoing embodiment. . PMIc represents the precoding matrix indication recommended by the UE for the closed-loop beamforming transmission scheme. Because the receiving energy of the port b is too low, the UE needs to recommend the base station to switch to a new port c for subsequent transmission, and/or the precoding matrix indicator PMI is used for indicating the precoding matrix of the base station for subsequent data transmission.
Optionally, the UE may also report CSI according to the content in table 4.
Figure BDA0001204718820000122
Figure BDA0001204718820000131
TABLE 4
Specifically, whether to adopt CSI of table 3 or table 4 may be decided by the UE. For example, according to the data and the reference signal measurement before the DMRS is transmitted, the UE knows whether other ports, except for the ports a and b, can better complete data transmission. For example, port b is blocked, if port c) is a suboptimal port except for port a and port b, but can still serve SFBC data transmission well (e.g., the signal-to-noise ratio for data detection exceeds a threshold), the UE may recommend to continue using SFBC, but update ports a and c; or the UE directly recommends the precoding indication PMIac of the next transmission. If the UE determines that there are no other ports meeting the requirements except for the port a and the port b, or the UE directly determines to adopt the closed-loop beamforming scheme, the UE may recommend that the base station switches to the transmission scheme of closed-loop beamforming, and recommend that the current port is c, or directly recommend that the PMI is PMIc. . Optionally, the UE may also perform calculation according to table 3 and table 4, and obtain CQI which is CQI _1 in table 3 and CQI which is CQI _2 in table 4 and uses SFBC, respectively, and the UE may select a transmission scheme corresponding to a larger CQI and a corresponding PMI to report.
Optionally, for each CSI reporting situation, the UE may also report two sets of CSI based on SFBC and closed-loop beamforming, which is determined by the base station.
Optionally, the CSI feedback may be reported to the base station together with HARQ information (ACK/NACK) feedback for the current data transmission, and the CSI and the HARQ information may be independently channel-coded.
In the method provided by this embodiment, in an SFBC transmission mode, data and port energy are measured, and whether CSI is reported is determined according to a detection result of the data, when a structure detected by a terminal device is a negative response, at least one CSI is recommended to a network side device, where the CSI includes port selection of a transmission scheme (including at least SFBC and closed-loop beamforming) that recommends next transmission, and a corresponding PMI and CQI, or PMI and CQI of multiple alternative transmission schemes (including at least SFBC and closed-loop beamforming) are reported, so that the network side device can be timely switched to an unobstructed port and to a better transmission scheme, and subsequent data transmission performance is improved.
An embodiment of the present application further provides an information receiving method, as shown in fig. 4, where the method includes:
step 201: and the network side equipment sends the data and the reference signal to the terminal equipment.
The reference signals comprise first reference signals, the first reference signals comprise first demodulation reference signals sent by at least two first ports, the first demodulation reference signals are demodulation reference signals of the data, and the terminal equipment receives the data according to a first transmission scheme.
Step 202: and the network side equipment receives the first information sent by the terminal equipment.
The first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement of the reference signal, each CSI includes at least one of port selection information and channel quality indicator CQI, and the port selection information is used to indicate at least one second port of the network side device.
The CSI also comprises: at least one of indication information, port quality information, and precoding matrix indicator PMI information, where the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data; the port quality information is used for representing the quality of the at least two first ports; the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
Wherein the first transmission scheme comprises a Space Frequency Block Coding (SFBC) transmission scheme, and the second transmission scheme comprises at least one of an SFBC transmission scheme and a closed-loop beamforming transmission scheme.
Specifically, in the SFBC transmission mode, in addition to data detection, a first demodulation reference signal DMRS is measured to obtain energy information of a port, and whether the port is blocked is determined according to the energy information, and a transmission scheme (including at least SFBC and closed-loop beamforming) for next transmission and/or port selection are recommended, and/or a corresponding precoding indicator (PMI) and Channel Quality Indicator (CQI) are/is reported, or port selection information, and/or PMI, and/or CQI of a plurality of alternative transmission schemes are/is reported, so that a network side device can make a decision.
Further, the network side device may receive, in addition to the transmission scheme recommended by the terminal device for the next transmission, port selection information, and/or PMI, and/or CQI of multiple alternative transmission schemes reported by the terminal device, and the network side device may determine the transmission scheme used for the next transmission from the multiple alternative transmission schemes reported by the terminal device.
In step 201, specifically, a network side device, for example, a base station, sends data and the first DMRS to a user equipment UE according to an SFBC scheme. And the base station simultaneously transmits the periodic or aperiodic CSI-RS, or transmits the periodic or aperiodic CSI-RS before the data and the DMRS are transmitted at this time, so as to assist the UE to perform other measurements. Or the base station simultaneously sends the second DMRS of other users and indicates the UE to measure the second DMRS through the signaling DCI.
In this embodiment, the second DMRS and the CSI-RS are referred to as a second reference signal. The first DMRS is used to estimate the downlink channel of the two first ports (port a and port b) of the SFBC to the UE, so that the UE can demodulate data on the two ports. The selection of the first ports a and b may be determined by the base station according to previous CSI feedback of the user equipment UE (for example, CSI feedback based on the currently transmitted data and CSI-RS transmitted before the DMRS).
For example, the base station confirms to use the precoding vector v according to the PMI reported by the UE beforea,vbAnd forming a first port a and a first port b, and using the first port a and the first port b as two ports of the SFBC. At subcarrier f1,f2In the above, let the downlink channel coefficients from port a and port b to the UE be h respectivelya,hbThen the downlink channel coefficient ha,hbA downlink channel matrix H from the base station to the UE and two port precoding vectors va,vbThe product of (a). Let the data symbol to be transmitted on the two subcarriers be s1,s2Then the UE is in subcarrier f1,f2Received data symbols of
Figure BDA0001204718820000151
Wherein n is1,n2Indicating that the receiver of the UE is on subcarrier f1,f2Receive noise of (2).
In step 202, the indication information is used to indicate that, if the received power of all the first demodulation reference signals is greater than or equal to a preset power, the second transmission scheme is the same as the first transmission scheme; and if at least one of the receiving powers of the first demodulation reference signals sent by the at least two first ports is smaller than the preset power, the second transmission scheme is different from the first transmission scheme.
Optionally, if the received power of all the first demodulation reference signals is greater than or equal to a preset power, the second port selected by the port selection information includes the first port; if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, at least one of the first ports is not included in a second port selected by the port selection information, and at least one of the second ports selected by the port selection information is different from the first port.
Optionally, the method further includes: if the detection result is a negative response, the first information received by the network side equipment comprises the at least one CSI; and if the detection result is an acknowledgement, the first information received by the network side equipment does not include the CSI.
Optionally, the method further includes: the reference signal further includes a second reference signal, the network side device sends the second reference signal to the terminal device through at least one third port, and the second reference signal includes at least one of a measurement reference signal CSI-RS and a second demodulation reference signal.
Optionally, if at least one of the received powers of the first demodulated signal is smaller than the received power of the second reference signal, at least one of the first ports does not include the second port selected by the port selection information in the at least one CSI.
In the method provided by this embodiment, the network side device receives first information sent by the terminal device, where the first information includes a detection result of the data and/or at least one CSI, and each CSI includes at least port selection information and a CQI for indicating channel quality, so as to indicate which port in the network side device is blocked, and recommend a new port, thereby avoiding the network side device from continuously adopting the blocked port to transmit data.
Corresponding to the information sending method, the embodiment of the invention also provides an information sending device. Fig. 5 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present invention. The information sending apparatus shown in fig. 5 may be configured to perform the relevant steps performed by the terminal equipment (UE) in the above embodiments of the methods, and the main functions of the information sending apparatus will be described below with reference to the specific structure of the information sending apparatus, and the non-related parts may be referred to in the above embodiments of the methods.
As shown in fig. 5, the information transmitting apparatus includes: a receiving unit 301 and a transmitting unit 302, wherein:
a receiving unit 301, configured to receive data and reference signals from a network side device, where the reference signals include first reference signals, the first reference signals include first demodulation reference signals sent by at least two first ports, and the first demodulation reference signals are demodulation reference signals of the data, and the receiving unit 301 is further configured to receive the data according to a first transmission scheme;
a sending unit 302, configured to send first information to the network side device, where the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement on the reference signal, each CSI includes at least one of port selection information and a CQI, and the port selection information is used to indicate at least one second port of the network side device.
In a possible design, the sending unit 302 is further configured to include the at least one CSI in the first information sent by the terminal device if the detection result is a negative acknowledgement; and if the detection result is an acknowledgement, the first information sent by the terminal equipment does not include the CSI.
In one possible design, the CSI further includes: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
In one possible design, the first transmission scheme may comprise a space-frequency block coding (SFBC) transmission scheme, and the second transmission scheme may comprise at least one of a SFBC transmission scheme and a closed-loop beamforming transmission scheme.
In one possible design, the apparatus further includes a processing unit 303, and the processing unit 303 is configured to determine the at least one CSI according to a comparison result between a received power of the first demodulation reference signal and a preset power.
In a possible design, the processing unit 303 is further configured to determine that the second transmission scheme indicated by the indication information is the same as the first transmission scheme if the received power of all the first demodulation reference signals is greater than or equal to a preset power; if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, the second transmission scheme indicated by the indication information is different from the first transmission scheme.
In a possible design, the processing unit 303 is further configured to determine that, if the received power of all the first demodulation first reference signals is greater than or equal to a preset power, the second port selected by the port selection information includes the first port; if at least one of the received powers of the first demodulated first reference signals is less than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
In one possible design, the reference signal further includes a second reference signal;
the processing unit 303 is further configured to determine at least one CSI in the first information according to the received powers of the first reference signal and the second reference signal.
In one possible design, the second reference signal includes at least one of a measurement reference signal CSI-RS and a second demodulation reference signal, where the second reference signal is transmitted through at least one third port of the network side device.
In one possible design, the processing unit 303 is further configured to, if at least one of the received powers of the first demodulated signal is smaller than the received power of the second reference signal, exclude at least one of the first ports from the second port selected by the port selection information in the at least one CSI.
The information transmitting apparatus shown in fig. 5 is divided from the perspective of functional modules, and in an actual application scenario, the structure of the information transmitting apparatus may be divided from the perspective of hardware, and the information transmitting apparatus shown in fig. 6 will be described from the perspective of hardware.
As shown in fig. 6, the information transmitting apparatus includes: a transmitter 401, a receiver 402, a controller/processor 403, a memory 404 and a modem processor 405.
The transmitter 401 conditions (e.g., converts to analog, filters, amplifies, and frequency upconverts, etc.) the output samples and generates an uplink signal, which is transmitted via an antenna to a network-side device, such as a base station, in the above-described embodiments. On the downlink, the antenna receives the downlink signal transmitted by the network side device in the above embodiment. Receiver 402 conditions (e.g., filters, amplifies, downconverts, and digitizes, etc.) the received signal from the antenna and provides input samples. In modem processor 405, an encoder 406 receives traffic data and signaling messages to be sent on the uplink and processes (e.g., formats, encodes, and interleaves) the traffic data and signaling messages. A modulator 407 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples. A demodulator 409 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 408 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the UE. The encoder 406, modulator 407, demodulator 409 and decoder 408 may be implemented by a combined modem processor 405. These elements are processed in accordance with the radio access technology employed by the radio access network (e.g., the access technologies of LTE and other evolved systems).
The controller/processor 403 controls and manages the operation of the information transmitting apparatus, and executes the operation executed by the processing unit 303 in fig. 5. The transmitter 401 is configured to perform the actions performed by the transmitting unit 302 in fig. 5, and the receiver 402 is configured to perform the actions performed by the receiving unit 301 in fig. 5. The memory 404 is used to store program codes and data for the processor 401 to execute.
Corresponding to the information receiving method, the embodiment of the invention also provides an information receiving device. Fig. 7 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present invention. The information receiving apparatus shown in fig. 7 may be configured to perform relevant steps performed by the network side device in the foregoing method embodiments, and the main functions of the information receiving apparatus will be described below with reference to specific structures of the information receiving apparatus, and reference may be made to the foregoing method embodiments for irrelevant portions.
As shown in fig. 7, the information receiving apparatus includes: a transmitting unit 501 and a receiving unit 502, wherein:
a sending unit 501, configured to send data and reference signals, where the reference signals include first reference signals, the first reference signals include first demodulation reference signals sent by at least two first ports, and the first demodulation reference signals are demodulation reference signals of the data, and the sending unit 501 is further configured to receive the data according to a first transmission scheme;
a receiving unit 502, configured to receive first information, where the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement on the reference signal, each CSI includes at least one of port selection information and a CQI, and the port selection information is used to indicate at least one second port of a network side device.
In one possible design, the apparatus further includes a processing unit 503,
the processing unit 503 is configured to determine that, if the detection result is a negative response, the first information received by the network side device includes the at least one CSI; and if the detection result is an acknowledgement, the first information received by the network side equipment does not include the CSI.
In one possible design, the CSI further includes: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
In one possible design, the first transmission scheme may comprise a space-frequency block coding (SFBC) transmission scheme, and the second transmission scheme may comprise at least one of a SFBC transmission scheme and a closed-loop beamforming transmission scheme.
In one possible design, the indication information is used to indicate that the second transmission scheme is the same as the first transmission scheme if the received power of all the first demodulation reference signals is greater than or equal to a preset power;
and if at least one of the receiving powers of the first demodulation reference signals sent by the at least two first ports is smaller than the preset power, the second transmission scheme is different from the first transmission scheme.
In a possible design, the processing unit 503 is further configured to determine that, if the received power of all the first demodulation reference signals is greater than or equal to a preset power, the second port selected by the port selection information includes the first port; and if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
In one possible design, the sending unit 501 is further configured to send a second reference signal to the terminal device through at least one third port, where the second reference signal includes at least one of a measurement reference signal CSI-RS and a second demodulation reference signal.
In one possible design, the processing unit 503 is further configured to determine that at least one of the first ports is not included in the second port selected by the port selection information in the at least one CSI if at least one of the received powers of the first demodulated signal is smaller than the received power of the second reference signal.
The information receiving apparatus shown in fig. 7 is divided from the perspective of functional modules, and in an actual application scenario, the information receiving apparatus may be divided from the perspective of hardware. The information receiving apparatus shown in fig. 8 will be explained about the structure of the information receiving apparatus from a hardware perspective.
As shown in fig. 8, the information receiving apparatus includes: a transmitter/receiver 601, a controller/processor 602, a memory 603, and a communication unit 604. The transmitter/receiver 601 is used to support information transceiving between a network side device and the terminal device in the above embodiments, and to support radio communication between the terminal device and other terminal devices. The controller/processor 602 performs various functions for communication with the terminal devices. In the uplink, uplink signals from the terminal device are received via the antenna, demodulated by the receiver 601, and further processed by the controller/processor 602 to recover the traffic data and signaling information sent by the terminal device. On the downlink, traffic data and signaling messages are processed by a controller/processor 602 and conditioned by a transmitter 601 to generate a downlink signal, which is transmitted via an antenna to terminal devices. The controller/processor 602 is also used to implement the functions of the processing unit 503 in fig. 7, and the transmitter/receiver 601 is also used to implement the functions of the transmitting unit 501 and the receiving unit 502 in fig. 7. The memory 603 is used to store program codes and data of the network side device. The communication unit 604 is configured to support the network-side device to communicate with other network entities.
It will be appreciated that fig. 6 only shows a simplified design of the network side device. In practical applications, the network-side device may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all network-side devices that can implement the present invention are within the scope of the present invention.
The controller/processor for performing the functions of the above terminal device and network side device of the present invention may be a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in user equipment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

Claims (36)

1. An information sending method, characterized in that the method comprises:
the terminal equipment receives data and reference signals from network side equipment, wherein the reference signals comprise first reference signals, the first reference signals comprise first demodulation reference signals sent by at least two first ports, the first demodulation reference signals are demodulation reference signals of the data, and the terminal equipment receives the data according to a first transmission scheme;
the terminal device sends first information to the network side device, the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement of the reference signal, each CSI at least includes one of port selection information and Channel Quality Indicator (CQI), and the port selection information is used for indicating at least one second port of the network side device.
2. The method according to claim 1, wherein the terminal device sends first information to the network side device, including:
if the detection result is a negative response, the first information sent by the terminal equipment comprises the at least one CSI;
and if the detection result is an acknowledgement, the first information sent by the terminal equipment does not include the CSI.
3. The method of claim 1, wherein the CSI further comprises: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
4. The method of claim 3, wherein the first transmission scheme comprises a Space Frequency Block Coding (SFBC) transmission scheme, and wherein the second transmission scheme comprises at least one of a SFBC transmission scheme and a closed-loop beamforming transmission scheme.
5. The method according to claim 3 or 4, characterized in that the method further comprises:
and the terminal equipment determines the at least one CSI according to the comparison result of the received power of the first demodulation reference signal and a preset power.
6. The method of claim 5, wherein determining the content of the at least one CSI according to the comparison result of the received power and a preset power comprises:
if the received power of all the first demodulation reference signals is greater than or equal to a preset power, the second transmission scheme indicated by the indication information is the same as the first transmission scheme;
if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, the second transmission scheme indicated by the indication information is different from the first transmission scheme.
7. The method of claim 5, wherein determining the content of the at least one CSI according to the comparison result of the received power and a preset power comprises:
if the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second port selected by the port selection information comprises the first port;
if at least one of the received powers of the first demodulated first reference signals is less than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
8. The method according to any of claims 1-4, wherein the reference signal further comprises a second reference signal, and the terminal device determines the first information according to the measurement result of the first reference signal, comprising:
and the terminal equipment determines at least one CSI in the first information according to the received power of the first reference signal and the second reference signal.
9. The method of claim 8, wherein the second reference signal comprises at least one of a measurement reference signal (CSI-RS) and a second demodulation reference signal (DM-RS), and wherein the second reference signal is transmitted through at least one third port of the network side device.
10. The method of claim 9, wherein the terminal device determines at least one CSI in the first information according to the received power of the first reference signal and the second reference signal, comprising:
and if at least one of the received powers of the first demodulated signals is less than that of the second reference signal, at least one of the first ports does not include the second port selected by the port selection information in the at least one CSI.
11. An information receiving method, characterized in that the method comprises:
the method comprises the steps that network side equipment sends data and reference signals to terminal equipment, the reference signals comprise first reference signals, the first reference signals comprise first demodulation reference signals sent by at least two first ports, the first demodulation reference signals are demodulation reference signals of the data, and the terminal equipment receives the data according to a first transmission scheme;
the network side equipment receives first information sent by the terminal equipment, the first information comprises a detection result of the data and/or at least one Channel State Information (CSI), each CSI is determined according to the measurement of the reference signal, each CSI at least comprises one of port selection information and Channel Quality Indicator (CQI), and the port selection information is used for indicating at least one second port of the network side equipment.
12. The method of claim 11, further comprising:
if the detection result is a negative response, the first information received by the network side equipment comprises the at least one CSI;
and if the detection result is an acknowledgement, the first information received by the network side equipment does not include the CSI.
13. The method of claim 11, wherein the CSI further comprises: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
14. The method of claim 13,
the first transmission scheme comprises a Space Frequency Block Coding (SFBC) transmission scheme, and the second transmission scheme comprises at least one of an SFBC transmission scheme and a closed-loop beamforming transmission scheme.
15. The method of claim 13, wherein the indication information is used to indicate,
if the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second transmission scheme is the same as the first transmission scheme;
and if at least one of the receiving powers of the first demodulation reference signals sent by the at least two first ports is smaller than the preset power, the second transmission scheme is different from the first transmission scheme.
16. The method according to any one of claims 11 to 14,
if the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second port selected by the port selection information comprises the first port;
and if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
17. The method according to any one of claims 11-14, further comprising:
the reference signal further includes a second reference signal, the network side device sends the second reference signal to the terminal device through at least one third port, and the second reference signal includes at least one of a measurement reference signal CSI-RS and a second demodulation reference signal.
18. The method of claim 17,
and if at least one of the received powers of the first demodulated signals is less than that of the second reference signal, at least one of the first ports does not include the second port selected by the port selection information in the at least one CSI.
19. An information transmission apparatus, comprising:
a receiving unit, configured to receive data and reference signals from a network side device, where the reference signals include first reference signals, the first reference signals include first demodulation reference signals sent by at least two first ports, and the first demodulation reference signals are demodulation reference signals of the data, and the receiving unit is further configured to receive the data according to a first transmission scheme;
a sending unit, configured to send first information to the network side device, where the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement on the reference signal, each CSI includes at least one of port selection information and a CQI, and the port selection information is used to indicate at least one second port of the network side device.
20. The apparatus of claim 19,
the sending unit is further configured to, if the detection result is a negative acknowledgement, include the at least one CSI in the sent first information; and if the detection result is a positive response, the CSI is not included in the transmitted first information.
21. The apparatus of claim 19, wherein the CSI further comprises: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
22. The apparatus of claim 21,
the first transmission scheme comprises a Space Frequency Block Coding (SFBC) transmission scheme, and the second transmission scheme comprises at least one of an SFBC transmission scheme and a closed-loop beamforming transmission scheme.
23. The apparatus according to claim 21 or 22, wherein the apparatus further comprises a processing unit configured to determine the at least one CSI according to a comparison result between a received power of the first demodulation reference signal and a preset power.
24. The apparatus of claim 23,
the processing unit is further configured to determine that the second transmission scheme indicated by the indication information is the same as the first transmission scheme if the received power of all the first demodulation reference signals is greater than or equal to a preset power; if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, the second transmission scheme indicated by the indication information is different from the first transmission scheme.
25. The apparatus of claim 23,
the processing unit is further configured to determine that, if the received power of all the first demodulation reference signals is greater than or equal to a preset power, the second port selected by the port selection information includes the first port; if at least one of the received powers of the first demodulated first reference signals is less than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
26. The apparatus of claim 23,
the reference signal further comprises a second reference signal;
the processing unit is further configured to determine at least one CSI in the first information according to the received powers of the first reference signal and the second reference signal.
27. The apparatus of claim 26, wherein the second reference signal comprises at least one of a measurement reference signal (CSI-RS) and a second demodulation reference signal (DM-RS), and wherein the second reference signal is transmitted through at least one third port of the network side device.
28. The apparatus of claim 27,
the processing unit is further configured to, if at least one of the received powers of the first demodulated signal is smaller than the received power of the second reference signal, not include at least one of the first ports in the second port selected by the port selection information in the at least one CSI.
29. An information receiving apparatus, characterized in that the apparatus comprises:
a sending unit, configured to send data and reference signals, where the reference signals include first reference signals, the first reference signals include first demodulation reference signals sent by at least two first ports, and the first demodulation reference signals are demodulation reference signals of the data, and the sending unit is further configured to receive the data according to a first transmission scheme;
a receiving unit, configured to receive first information, where the first information includes a detection result of the data and/or at least one CSI, each CSI is determined according to measurement on the reference signal, each CSI includes at least one of port selection information and a CQI, and the port selection information is used to indicate at least one second port of a network side device.
30. The apparatus of claim 29, further comprising a processing unit,
the processing unit is configured to determine that, if the detection result is a negative response, the first information received by the network side device includes the at least one CSI; and if the detection result is an acknowledgement, the first information received by the network side equipment does not include the CSI.
31. The apparatus of claim 30, wherein the CSI further comprises: at least one of indication information, port quality information, and precoding matrix indication PMI information,
the indication information is used to indicate a second transmission scheme used by the network side device when transmitting second data, and the at least one second port selected by the port selection information is a port used by the second transmission scheme to transmit the second data;
the port quality information is used for representing the quality of the at least two first ports;
the PMI information is used to indicate a precoding matrix adopted by the network side device in the second transmission scheme.
32. The apparatus of claim 31,
the first transmission scheme comprises a Space Frequency Block Coding (SFBC) transmission scheme, and the second transmission scheme comprises at least one of an SFBC transmission scheme and a closed-loop beamforming transmission scheme.
33. The apparatus of claim 31, wherein the indication information is used to indicate,
if the received power of all the first demodulation reference signals is greater than or equal to the preset power, the second transmission scheme is the same as the first transmission scheme;
and if at least one of the receiving powers of the first demodulation reference signals sent by the at least two first ports is smaller than the preset power, the second transmission scheme is different from the first transmission scheme.
34. The apparatus of any one of claims 30-33,
the processing unit is further configured to determine that, if the received powers of all the first demodulation reference signals are greater than or equal to a preset power, the second port selected by the port selection information includes the first port; and if at least one of the received powers of the first demodulation reference signals is smaller than the preset power, at least one of the first ports is not included in the second port selected by the port selection information.
35. The apparatus of any one of claims 30-33,
the sending unit is further configured to send a second reference signal to the terminal device through the at least one third port, where the second reference signal includes at least one of a measurement reference signal CSI-RS and a second demodulation reference signal.
36. The apparatus of claim 35,
the processing unit is further configured to determine that, if at least one of the received powers of the first demodulated signal is smaller than the received power of the second reference signal, at least one of the first ports is not included in the second port selected by the port selection information in the at least one CSI.
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