WO2020199714A1 - 一种信道状态信息csi上报的方法和设备 - Google Patents

一种信道状态信息csi上报的方法和设备 Download PDF

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Publication number
WO2020199714A1
WO2020199714A1 PCT/CN2020/071251 CN2020071251W WO2020199714A1 WO 2020199714 A1 WO2020199714 A1 WO 2020199714A1 CN 2020071251 W CN2020071251 W CN 2020071251W WO 2020199714 A1 WO2020199714 A1 WO 2020199714A1
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Prior art keywords
terminal
csi
sci
sent
service data
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PCT/CN2020/071251
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English (en)
French (fr)
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郑石磊
赵锐
郑方政
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a method and device for reporting channel state information CSI.
  • the new generation communication mode NR V2X New Radio Vehicle To Everything, wireless communication technology for new air vehicles
  • Newly added unicast and multicast communication modes Compared with the original LTE V2X (Long Term Evolution Vehicle To Everything, Long Term Evolution Vehicle To Everything) broadcast communication mode, the new generation communication mode NR V2X (New Radio Vehicle To Everything, wireless communication technology for new air vehicles), Newly added unicast and multicast communication modes.
  • the present application provides a method and device for reporting channel state information CSI to solve the problem that there is no corresponding CSI feedback reporting method for PC5 interface unicast communication in the prior art.
  • a method for reporting channel state information CSI includes:
  • the first terminal receives the direct link control information SCI sent by the second terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • the first terminal sends the CSI together with the service data that needs to be sent to the second terminal or sends the CSI to the second terminal.
  • the first terminal when the first terminal receives the direct link control information SCI sent by the second terminal, if it is determined that the SCI contains an indication message for instructing the first terminal to feedback the channel status, the first terminal compares the CSI with the service to be sent The data is sent to the second terminal together, or the CSI is sent to the second terminal separately without the service data, so that the first terminal can report the CSI to the second terminal, which realizes the CSI feedback in NR V2X, thereby enabling the second terminal It can control data retransmission according to CSI or adjust the transmission scheme to adapt to the channel state, thereby improving system performance and resource utilization.
  • the first terminal sends the CSI together with the service data to be sent, including:
  • the first terminal places the CSI in the MAC CE or RRC signaling and sends the service data to the second terminal together.
  • the first terminal puts the CSI in the MAC CE or RRC signaling and sends the service data together with the service data to the second terminal.
  • the transmission mode of the CSI feedback information is relatively simple, no special indication resource mapping is required, and the resource utilization rate is high.
  • the first terminal places the CSI in the MAC CE and sends the service data to the second terminal together, which further includes:
  • the first terminal places the MAC subheader used to indicate the PC5 interface carrying CSI in the MAC CE.
  • the MAC subheader used to indicate the PC5 interface carrying CSI is a MAC subheader that has a predefined correspondence between LCID and CSI in the MAC subheader.
  • the first terminal places the CSI in the MAC CE and sends the service data together with the service data to the second terminal.
  • the second terminal can distinguish between the information of the CSI feedback and the non-information according to the LCID Feedback information about CSI.
  • the first terminal sends the CSI together with the service data to be sent to the second terminal, including:
  • the first terminal sends the CSI together with the service data to be sent to the second terminal in the form of PSSCH-piggyback;
  • the position of the RE occupied by the CSI is agreed upon by the protocol or configured through RRC signaling or pre-configured through RRC signaling.
  • the first terminal sends the CSI together with the service data to be sent to the second terminal in the form of PSSCH-piggyback; wherein the position of the RE occupied by the CSI is agreed upon by the protocol or configured through RRC signaling or pre-configured through RRC signaling , Enabling the first terminal to report CSI to the second terminal, realizing CSI feedback in NR V2X, and enabling the second terminal to retransmit or adjust the transmission scheme according to the CSI control data to adapt to the channel state, thereby improving system performance and resources Utilization rate.
  • the position of the RE occupied by the CSI and the position of the RE where the demodulation reference signal DMRS is located are separated by N OFDM symbols in the time domain, and N is a natural number.
  • the position of the RE occupied by the CSI is configured to be between the position of the RE where the demodulation reference signal DMRS is located N OFDM symbols are spaced in the time domain so that the second terminal can decode the CSI from the data sent by the first terminal, which improves the decoding performance of the second terminal.
  • the number of REs mapped by the CSI is proportional to the number of physical resource blocks PRB occupied by the PSSCH.
  • the number of REs configured with CSI mapping is proportional to the number of physical resource blocks PRB occupied by the PSSCH As the number of PRBs occupied by the PSSCH increases, CSI reappears in the frequency domain to ensure effective feedback coverage, thereby improving the reliability of CSI feedback.
  • the first terminal sends the CSI together with the service data to be sent to the second terminal or sends the CSI to the second terminal, including:
  • the first terminal After the arrival of the scheduled time node included in the SCI, the first terminal sends the CSI together with the service data to be sent to the second terminal or sends the CSI to the second terminal.
  • the second terminal can know that the data sent by the first terminal at the preset time node contains CSI, so that the second terminal can obtain feedback from the first terminal from the data sent by the first terminal.
  • CSI is not sent together with the service data.
  • more feedback information can be carried in the transmission channel.
  • the code rate is correspondingly lower, which not only ensures the accuracy of the feedback, but also ensures the accuracy of the mapping process.
  • the decoding process is relatively simple.
  • the first terminal sends the CSI together with the service data to be sent to the second terminal, including:
  • the first terminal sends to the second terminal the SCI and CSI containing indication information used to indicate that the time slot contains CSI together with the service data to be sent; or
  • the first terminal sends CSI to the second terminal, including:
  • the first terminal sends to the second terminal SCI and CSI containing indication information used to indicate that the time slot contains CSI.
  • the SCI and CSI containing the indication information indicating that the CSI is contained in the time slot are sent to the second terminal together with the service data to be sent, or the SCI containing the indication information indicating that the CSI is contained in the time slot is sent to the second terminal.
  • the CSI and CSI are sent to the second terminal, so that the second terminal can accurately obtain the CSI fed back by the first terminal from the data sent by the first terminal through the SCI containing the indication information of the CSI.
  • a method for reporting channel state information CSI includes:
  • the second terminal sends the direct link control information SCI to the first terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • the second terminal extracts the CSI fed back by the first terminal from the CSI fed back by the first terminal and the service data, or the second terminal receives the CSI fed back by the first terminal.
  • the SCI includes the reserved time node corresponding to the feedback CSI
  • the second terminal extracts the CSI fed back by the first terminal from the CSI and service data fed back by the first terminal, including: the second terminal extracts the first terminal from the CSI and service data fed back by the first terminal after the arrival of the scheduled time node included in the SCI. CSI feedback from the terminal;
  • the second terminal receiving the CSI fed back by the first terminal includes: the second terminal receiving the CSI fed back by the first terminal after the scheduled time node included in the SCI arrives.
  • the SCI does not include the scheduled time node corresponding to the feedback CSI
  • the second terminal extracts the CSI fed back by the first terminal from the CSI fed back by the first terminal and service data, including:
  • the second terminal receives the SCI, CSI, and service data that contain the indication information used to indicate the CSI included in the time slot sent by the first terminal, and extracts the CSI fed back by the first terminal from the time slot indicated by the SCI sent by the first terminal;
  • the second terminal receiving the CSI fed back by the first terminal includes: the second terminal receives the SCI and the CSI containing the indication information used to indicate that the CSI is included in the time slot sent by the first terminal, and the time slot indicated by the SCI sent from the first terminal The CSI fed back by the first terminal is received within.
  • the second terminal sends the direct link control information SCI to the first terminal, where the SCI contains an indication message for instructing the first terminal to feed back the channel status, and the second terminal extracts the first terminal from the CSI and service data fed back by the first terminal.
  • the CSI fed back by a terminal, or the CSI fed back by the second terminal received by the first terminal enables the first terminal to report CSI to the second terminal, which realizes the CSI feedback in NR V2X, which in turn enables the second terminal to control the data according to the CSI. Transmission or adjustment of the transmission scheme to adapt to the channel state, thereby improving system performance and resource utilization.
  • a device for reporting channel state information CSI includes: a processor and a memory; wherein the processor is configured to read a program in the memory and execute the following process:
  • the CSI is sent to the second terminal together with the service data to be sent or the CSI is sent to the second terminal.
  • the processor is specifically used for:
  • the processor is also used to:
  • the processor is also used to:
  • the processor is specifically used for:
  • the position of the RE occupied by the CSI is agreed upon by the protocol or configured through RRC signaling or pre-configured through RRC signaling.
  • the processor is also used to:
  • the position of the RE occupied by the configuration CSI and the position of the RE where the demodulation reference signal DMRS is located are separated by N OFDM symbols in the time domain, where N is a natural number.
  • the processor is also used to:
  • the number of REs configured with CSI mapping is proportional to the number of physical resource blocks PRB occupied by the PSSCH.
  • the processor is specifically used for:
  • the CSI is sent to the second terminal together with the service data to be sent or the CSI is sent to the second terminal.
  • the processor is specifically used for:
  • Sending CSI to the second terminal includes:
  • the SCI and CSI containing the indication information used to indicate that the CSI is contained in the time slot are sent to the second terminal.
  • a device for reporting channel state information CSI includes: a processor and a memory; wherein the processor is configured to read a program in the memory and execute the following process:
  • the CSI fed back by the first terminal is extracted from the CSI fed back by the first terminal and the service data, or the CSI fed back by the first terminal is received by the second terminal.
  • the SCI includes the reserved time node corresponding to the feedback CSI; the processor is specifically used for:
  • the SCI does not include the reserved time node corresponding to the feedback CSI; the processor is specifically used for:
  • Receive SCI and CSI that are sent by the first terminal and include indication information used to indicate that the CSI is included in the time slot, and receive CSI fed back by the first terminal from the time slot indicated by the SCI sent by the first terminal.
  • an embodiment of the present application also provides a device for reporting channel state information CSI, which includes a receiving module and a processing module:
  • the receiving module is configured to receive the direct link control information SCI sent by the second terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • the processing module is configured to send the CSI together with the service data to be sent to the second terminal or send the CSI to the second terminal.
  • the processing module is specifically used to:
  • processing module is also used to:
  • processing module is also used to:
  • the processing module is specifically used to:
  • the position of the RE occupied by the CSI is agreed upon by the protocol or configured through RRC signaling or pre-configured through RRC signaling.
  • processing module is also used to:
  • the position of the RE occupied by the configuration CSI and the position of the RE where the demodulation reference signal DMRS is located are separated by N OFDM symbols in the time domain, where N is a natural number.
  • processing module is also used to:
  • the number of REs configured with CSI mapping is proportional to the number of physical resource blocks PRB occupied by the PSSCH.
  • the processing module is specifically used to:
  • the CSI is sent to the second terminal together with the service data to be sent or the CSI is sent to the second terminal.
  • the processing module is specifically used to:
  • Sending CSI to the second terminal includes:
  • the SCI and CSI containing the indication information used to indicate that the CSI is contained in the time slot are sent to the second terminal.
  • an embodiment of the present application also provides a device for reporting channel state information CSI, which includes a sending module and a processing module:
  • a sending module configured to send the direct link control information SCI to the first terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • the processing module is configured to extract the CSI fed back by the first terminal from the CSI fed back by the first terminal and service data, or the second terminal receives the CSI fed back by the first terminal.
  • the SCI contains the reserved time node corresponding to the feedback CSI; the processing module is specifically used for:
  • the SCI does not include the reserved time node corresponding to the feedback CSI; the processing module is specifically used for:
  • Receive SCI and CSI that are sent by the first terminal and include indication information used to indicate that the CSI is included in the time slot, and receive CSI fed back by the first terminal from the time slot indicated by the SCI sent by the first terminal.
  • the present application also provides a computer storage medium on which a computer program is stored, and when the program is executed by a processing unit, the steps of the method of the first aspect or the second aspect are implemented.
  • FIG. 1 is a schematic diagram of a unicast system provided by an embodiment of the application
  • FIG. 2A is a schematic diagram of a channel state information CSI reporting process provided by Embodiment 1 of this application;
  • FIG. 2B is a schematic diagram of another channel state information CSI reporting process provided by Embodiment 1 of this application;
  • FIG. 3 is a schematic diagram of the principle of the PSSCH-piggyback mode provided in Embodiment 4 of the application;
  • Fig. 5 is a schematic flow chart of a method for reporting channel state information CSI according to an embodiment of the application
  • FIG. 6 is a schematic flowchart of another method for reporting channel state information CSI according to an embodiment of this application.
  • FIG. 7A is a flowchart of a complete method for reporting channel state information CSI according to an embodiment of this application.
  • FIG. 7B is a flowchart of another complete method for reporting channel state information CSI according to an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a first terminal provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of a second terminal provided by an embodiment of the application.
  • FIG. 10 is a schematic structural diagram of a device for reporting channel state information CSI according to an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of another device for reporting channel state information CSI according to an embodiment of this application.
  • terminal in the embodiments of this application refers to a communication device that can report channel state information, including mobile phones, computers, tablets, etc.
  • the new generation communication mode NR V2X has newly added unicast and multicast communication modes.
  • the embodiment of the present application proposes a CSI reporting method for the NR V2X communication mode, which can perform CSI feedback during unicast communication on the V2X PC5 interface.
  • the method for reporting channel state information CSI in the embodiment of the present application mainly involves two terminals that perform unicast communication (of course, it can also be two terminals for multicast communication), specifically: the first terminal 10 and second terminal 20.
  • the first terminal 10 is configured to send the channel state information CSI to the second terminal according to the configuration, pre-configuration, SCI indication sent by the second terminal 20, or the CSI feedback mode determined by one or more methods of the V2X unicast connection establishment process. Terminal 20.
  • the second terminal 20 is configured to send an SCI indication to the first terminal 10 and receive CSI information and data reported by the first terminal 10.
  • CSI may include one or more of CQI (Channel Quality Indicator), RI (Rank Indication, rank indicator), and PMI (Precoding Matrix Indicator, precoding matrix indicator).
  • CQI Channel Quality Indicator
  • RI Rank Indication, rank indicator
  • PMI Precoding Matrix Indicator, precoding matrix indicator
  • whether to perform CSI feedback and which of the above two methods is used for feedback can be determined by one or more of configuration, pre-configuration, SCI indication, or V2X unicast connection establishment process.
  • V2X PC5 unicast communication requires CSI feedback
  • CSI feedback when sending CSI feedback to the second terminal, there are the following two methods to choose from.
  • Method 1 CSI feedback is sent along with service data.
  • Method 2 CSI feedback is not sent together with service data, and CSI feedback is sent separately.
  • the CSI feedback information can be carried through the feedback channel of the PC5 physical layer, or through the PSSCH (Physical Sidelink Share Channe, physical Sidelink shared channel).
  • the CSI feedback information can be carried through the PSSCH.
  • the CSI feedback information is sent along with the service data, and there are two specific implementation methods as follows:
  • the CSI feedback information of the PC5 interface can be combined with service data in the form of MAC CE (MAC Control Element) signaling of the PC5 interface and carried by PSSCH for transmission.
  • MAC CE MAC Control Element
  • the MAC subheader of the PC5 interface needs to predefine the LCID (Logical Channel ID) corresponding to the PC5CSI feedback information, so as to distinguish the CSI from the service data.
  • the CSI feedback information of the PC5 interface can also be combined with the service data in the manner of RRC (Radio Resource Control, radio resource control) signaling of the PC5 and carried by the PSSCH.
  • RRC Radio Resource Control, radio resource control
  • Scheme 2 The transmission of the CSI feedback information of the PC5 interface is performed in a "PSSCH-piggyback" manner. Specifically, the CSI feedback information is directly mapped to the corresponding RE (Resource element, resource block) of the PSSCH. During specific transmission, whether to perform CSI feedback information transmission in the RE and the location of the RE occupied by the CSI feedback information can be determined based on a preset protocol agreement, configuration, pre-configuration, or SCI indication.
  • REs carrying CSI feedback information transmission are distributed near DMRS (Demodulation Reference Signal, demodulation reference signal) to ensure decoding performance.
  • DMRS Demodulation Reference Signal, demodulation reference signal
  • the number of REs occupied by CSI increases in proportion to the number of PRBs occupied by PSSCH, that is, the positions of REs occupied by CSI in the PRBs of PSSCH are fixed, and as the number of PRBs increases, in the frequency domain Repeatedly on.
  • the structure of sending CSI feedback information separately is similar to the structure of sending data separately. The difference is that sending CSI feedback information separately does not require a large size when sending data separately.
  • the frequency domain width is about 1RBs or 2RBs. See this for details. Apply for the following specific examples.
  • the modes of sending CSI feedback can have the following three combinations:
  • Combination 1 only use the above method one. In this combination, only when the first terminal has service data to send, the CSI feedback will be sent along with the service data. If no service data is sent, the CSI feedback information is not fed back.
  • the frequency domain resource granularity in the resource selection process of the service data can be sub-channels (including multiple consecutive PRBs in the frequency domain), and for the CSI feedback, the included information bits Relatively few, the granularity of frequency domain resources usually used is PRB.
  • the methods for sensing idle resources are different, which in turn leads to more complicated sensing processes.
  • whether or not to support CSI feedback to be sent separately depends on the processing capability of the first terminal.
  • the first terminal may determine when the CSI feedback needs to be performed according to the received SCI information sent by the second terminal. This will be described in detail below in conjunction with Embodiment 1 below.
  • the first terminal determining when to perform CSI feedback may include but is not limited to the following steps:
  • Step 201 The first terminal receives the SCI sent by the second terminal.
  • Step 202 The first terminal judges whether the SCI contains an indication message for instructing the first terminal to feed back the channel state, if yes, execute step 203, otherwise, execute step 206.
  • step 203 the first terminal judges whether a reserved time node is included in the SCI, if yes, execute step 204, otherwise execute step 205.
  • Step 204 The first terminal determines that the SCI contains an indication message for instructing the first terminal to feedback the channel status, and the SCI contains a reserved time node, then the first terminal sends CSI feedback information to the second terminal after the reserved time node arrives .
  • the first terminal when it sends CSI feedback information to the second terminal, it can use any of the three combinations described in the above-mentioned embodiments of this application for sending, which can be specified by the SCI, or configured or pre-configured. , It can also be selected according to terminal performance, which is not limited in the embodiment of the present application.
  • Step 205 The first terminal determines that the SCI contains an indication message for instructing the first terminal to feed back the channel status, and the SCI does not contain the reserved time node, then the first terminal sends SCI+CSI to the second terminal.
  • the terminal sends CSI feedback information, where the SCI sent by the first terminal to the second terminal includes indication signaling for indicating whether the current time slot contains CSI feedback information.
  • the first terminal when it sends CSI feedback information to the second terminal, it can use any of the three combinations described in the above-mentioned embodiments of this application for sending, which can be specified by the SCI, or configured or pre-configured. , It can also be selected according to terminal performance, which is not limited in the embodiment of the present application.
  • Step 206 When the first terminal determines that the SCI does not include an indication message for instructing the first terminal to feedback the channel state, it determines that there is no need to send a CSI feedback message to the second terminal.
  • the second terminal After the second terminal sends to the first terminal an SCI containing an indication message for instructing the first terminal to feed back the channel status, if the SCI contains a reserved time node, the second terminal sends a message from the first terminal after the reserved time node arrives If the SCI does not include the reserved time node, the second terminal obtains the CSI feedback information according to whether the SCI sent by the first terminal contains the indication signaling indicating that the current time slot contains CSI feedback information.
  • the specific steps are as follows: As shown in Figure 2B, it can include but is not limited to:
  • Step 2001 The second terminal sends an SCI to the first terminal, and the SCI contains an indication message for instructing the first terminal to feedback the channel state.
  • step 2002 the second terminal judges whether a reserved time node is included in the SCI, if yes, execute step 2003, otherwise, execute step 2004.
  • step 2003 the second terminal obtains the CSI from the message sent by the first terminal after the scheduled time node arrives.
  • Step 2004 The second terminal judges whether the SCI sent by the first terminal contains indication signaling indicating that the current time slot contains CSI feedback information, if yes, execute step 2005, otherwise execute step 2006.
  • step 2005 the second terminal extracts the CSI feedback information from the time slot data indicated by the SCI sent by the first terminal when it determines that the SCI sent by the first terminal contains indication signaling indicating that the current time slot contains CSI feedback information.
  • step 2006 when the second terminal determines that the SCI sent by the first terminal does not contain indication signaling indicating that the current time slot contains CSI feedback information, the second terminal normally receives the service data sent by the first terminal.
  • This embodiment mainly introduces the process of CSI feedback using scheme 1 in the above-mentioned way. If the second terminal of the PC5 interface triggers the CSI feedback request through the SCI, that is, the second terminal sends the SCI to the first terminal, and the SCI contains an indication message for instructing the first terminal to feedback the channel state, the CSI feedback information of the PC5 interface
  • the MAC CE signaling of the PC5 interface or the RRC signaling of the PC5 interface is combined with the service data, and the PSSCH is used for bearer transmission.
  • the CSI feedback information is distinguished by the MAC subheader of the PC5 interface.
  • the MAC subheader needs to define the LCID corresponding to the CSI feedback information of the PC5 interface.
  • the second terminal extracts the LCID part of the MAC sub-header to obtain the CSI feedback information.
  • This embodiment mainly introduces the feedback triggering process of Scheme 2 in the first way.
  • the second terminal of the PC5 interface triggers the CSI feedback request through SCI, and there are two specific triggering methods:
  • the SCI information sent by the second terminal to the first terminal includes the indication signaling that triggers CSI feedback and includes the scheduled CSI feedback delay t.
  • the SCI information indicates that the first terminal sends to the second terminal after t milliseconds.
  • CSI feedback information In this case, the second terminal only needs to acquire the CSI feedback information at a specific moment, and does not need to use the SCI information sent by the first terminal to determine whether the CSI feedback information exists.
  • the SCI information sent by the second terminal to the first terminal contains only one indication signaling that triggers CSI feedback. After receiving the corresponding feedback CSI indication, the first terminal indicates in the sent SCI information whether the data contains There is CSI feedback information. After receiving the SCI information, the second terminal first determines whether the data received this time includes CSI feedback information, and if it includes CSI feedback information, it acquires CSI information.
  • This embodiment mainly introduces the CSI feedback process of Scheme 2 in the above-mentioned way.
  • the mapping of CSI feedback information transmission is performed in a "PSSCH-piggyback" manner.
  • the RE position occupied by the CSI feedback information can be set through protocol agreement, configuration, and pre-configuration.
  • the number of REs occupied by CSI increases in proportion to the number of PRBs occupied by PSSCH as an example.
  • the CSI occupied REs are symmetrically distributed on both sides of the DMRS in a tree-like manner.
  • Each PRB of the entire PSSCH uses the mapping structure shown in Figure 3 to ensure the decoding performance of the RE occupied by the CSI and the CSI signal occupying the entire time domain symbol. The power ratio remains unchanged, thereby determining the effective feedback coverage.
  • Embodiment 5 takes the second method as an example.
  • the first terminal has no service data to send at the current moment, it chooses to send CSI feedback separately.
  • the service data channel of the first terminal only maps CSI feedback information.
  • the overall structure is similar to that of sending service data separately. The difference is that the large size selected when transmitting service data is not required.
  • the frequency domain width of 1RBs or 2RBs can meet the demand, as shown in the figure.
  • the second terminal since the CSI information is periodically fed back at this time, the second terminal can know which time slots contain CSI feedback information, and the second terminal can directly perform decoding to complete the acquisition of CSI feedback information.
  • the embodiment of the present application provides a method for reporting channel state information CSI, which specifically includes the following steps:
  • Step 501 The first terminal receives the direct link control information SCI sent by the second terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • Step 502 The first terminal sends the CSI together with the service data to be sent to the second terminal or sends the CSI to the second terminal.
  • the first terminal sends the CSI together with the service data to be sent, including:
  • the first terminal places the CSI in the MAC CE or RRC signaling and sends the service data to the second terminal together.
  • the first terminal places the CSI in the MAC CE and sends the service data to the second terminal together, which further includes:
  • the first terminal places the MAC subheader used to indicate the PC5 interface carrying CSI in the MAC CE.
  • the MAC subheader used to indicate that the PC5 interface carrying CSI is a MAC subheader that has a predefined correspondence between LCID and CSI in the MAC subheader.
  • the first terminal sends the CSI together with the service data to be sent to the second terminal, including:
  • the first terminal sends the CSI along with the service data to be sent to the second terminal in the form of PSSCH-piggyback;
  • the position of the RE occupied by the CSI is agreed upon by the protocol or configured through RRC signaling or pre-configured through RRC signaling.
  • the position of the RE occupied by the CSI and the position of the RE where the demodulation reference signal DMRS is located are separated by N OFDM symbols in the time domain, and N is a natural number.
  • the number of REs mapped by the CSI is proportional to the number of physical resource blocks PRB occupied by the PSSCH.
  • the first terminal sends the CSI together with the service data to be sent to the second terminal or sends the CSI to the second terminal, including:
  • the first terminal After the arrival of the scheduled time node included in the SCI, the first terminal sends the CSI together with the service data to be sent to the second terminal or sends the CSI to the second terminal.
  • the first terminal sends the CSI together with the service data to be sent to the second terminal, including:
  • the first terminal sends to the second terminal the SCI and CSI containing indication information used to indicate that the time slot contains CSI together with the service data to be sent; or
  • the first terminal sends CSI to the second terminal, including:
  • the first terminal sends to the second terminal SCI and CSI containing indication information used to indicate that the time slot contains CSI.
  • the embodiment of the present application provides a method for reporting channel state information CSI, which specifically includes the following steps:
  • Step 601 The second terminal sends the direct link control information SCI to the first terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • Step 602 The second terminal extracts the CSI fed back by the first terminal from the CSI fed back by the first terminal and the service data, or the second terminal receives the CSI fed back by the first terminal.
  • the SCI includes the scheduled time node corresponding to the feedback CSI
  • the second terminal extracts the CSI fed back by the first terminal from the CSI and service data fed back by the first terminal, including: the second terminal extracts the first terminal from the CSI and service data fed back by the first terminal after the arrival of the scheduled time node included in the SCI. CSI feedback from the terminal;
  • the second terminal receiving the CSI fed back by the first terminal includes: the second terminal receiving the CSI fed back by the first terminal after the scheduled time node included in the SCI arrives.
  • the scheduled time node corresponding to the feedback CSI is not included in the SCI;
  • the second terminal extracts the CSI fed back by the first terminal from the CSI fed back by the first terminal and service data, including:
  • the second terminal receives the SCI, CSI, and service data that include indication information used to indicate that the CSI is included in the time slot sent by the first terminal, and extracts the CSI fed back by the first terminal from the time slot indicated by the SCI sent by the first terminal;
  • the second terminal receiving the CSI fed back by the first terminal includes: the second terminal receives the SCI and the CSI containing the indication information used to indicate that the CSI is included in the time slot sent by the first terminal, and the time slot indicated by the SCI sent from the first terminal The CSI fed back by the first terminal is received within.
  • the SCI sent by the second terminal to the first terminal includes an indication message for instructing the first terminal to feed back the channel status, but does not include the reserved time node as an example, a channel status provided in this embodiment of the application
  • the method for reporting information CSI includes the following steps:
  • Step 700 The second terminal sends an SCI to the first terminal.
  • the SCI includes an indication message for instructing the first terminal to feed back the channel state, and does not include the reserved time node.
  • Step 701 After receiving the SCI sent by the second terminal, the first terminal determines that the reserved time node is not included in the SCI, and the first terminal determines to send CSI feedback information to the second terminal through SCI+CSI, where the first terminal The SCI sent to the second terminal includes indication signaling for indicating whether the current time slot data includes CSI feedback information.
  • Step 702 When determining that the CSI feedback information needs to be sent, the first terminal sends the SCI, CSI feedback information, and service data that include indication signaling for indicating that the current time slot data includes CSI feedback information to the second terminal.
  • the SCI and CSI feedback information including the indication signaling used to indicate that the current time slot data contains CSI feedback information may also be sent to the second terminal.
  • Step 703 When the second terminal receives the SCI, CSI, and service data including the indication signaling used to indicate that the current time slot data includes CSI feedback information, the second terminal determines according to the SCI indication sent by the first terminal The current time slot data includes CSI feedback information, and the second terminal extracts the CSI feedback information from the current time slot data.
  • the SCI sent by the second terminal to the first terminal includes an indication message for instructing the first terminal to feed back the channel state and includes the reserved time node as an example, a channel state provided in this embodiment of the application
  • the method for reporting information CSI includes the following steps:
  • Step 7000 The second terminal sends an SCI to the first terminal.
  • the SCI includes an indication message for instructing the first terminal to feed back the channel state, and includes a reserved time node.
  • Step 7001 After receiving the SCI sent by the second terminal, the first terminal determines that the SCI contains the reserved time node, and the first terminal determines to send CSI feedback information to the second terminal after the reserved time node arrives.
  • Step 7002 After the reserved time node arrives, the first terminal sends the CSI feedback information together with the service data to the second terminal, or sends the CSI feedback information to the second terminal separately.
  • Step 7003 The second terminal obtains CSI feedback information from the information sent by the first terminal after the arrival of the scheduled time node.
  • the embodiment of this application also provides a device for reporting channel state information CSI.
  • This device is the device in the method in the embodiment of this application, and the principle of the device to solve the problem is the same as that of the method. Similar, so the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.
  • the first terminal in the embodiment of the present application includes: a processor 800, a memory 801, and a transceiver 802.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 can store data used by the processor 800 when performing operations.
  • the transceiver 802 is used to receive and send data under the control of the processor 800.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 800 and various circuits of the memory represented by the memory 801 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein.
  • the bus interface provides the interface.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 can store data used by the processor 800 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 800 or implemented by the processor 800.
  • each step of the signal processing flow can be completed by hardware integrated logic circuits in the processor 800 or instructions in the form of software.
  • the processor 800 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the embodiments of the present application The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 801, and the processor 800 reads the information in the memory 801 and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 800 is configured to read the program in the memory 801 and execute the following process:
  • the CSI is sent to the second terminal together with the service data to be sent or the CSI is sent to the second terminal.
  • processor 800 is specifically used for:
  • processor 800 is also used for:
  • processor 800 is also used for:
  • processor 800 is specifically used for:
  • the position of the RE occupied by the CSI is agreed upon by the protocol or configured through RRC signaling or pre-configured through RRC signaling.
  • processor 800 is also used for:
  • the position of the RE occupied by the configuration CSI and the position of the RE where the demodulation reference signal DMRS is located are separated by N OFDM symbols in the time domain, where N is a natural number.
  • processor 800 is also used for:
  • the number of REs configured with CSI mapping is proportional to the number of physical resource blocks PRB occupied by the PSSCH.
  • processor 800 is specifically used for:
  • the CSI is sent to the second terminal together with the service data to be sent or the CSI is sent to the second terminal.
  • processor 800 is specifically used for:
  • Sending CSI to the second terminal includes:
  • the SCI and CSI containing the indication information used to indicate that the CSI is contained in the time slot are sent to the second terminal.
  • the embodiment of this application also provides a device for reporting channel state information CSI.
  • This device is the device in the method in the embodiment of this application, and the principle of the device to solve the problem is the same as that of the method. Similar, so the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.
  • the second terminal in the embodiment of the present application includes: a processor 900, a memory 901, and a transceiver 902.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 can store data used by the processor 900 when performing operations.
  • the transceiver 902 is used to receive and transmit data under the control of the processor 900.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 900 and various circuits of the memory represented by the memory 901 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits. These are all well-known in the art, and therefore, no further description will be given here.
  • the bus interface provides the interface.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 can store data used by the processor 900 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 900 or implemented by the processor 900.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 900 or instructions in the form of software.
  • the processor 900 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the embodiments of the present application The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 901, and the processor 900 reads the information in the memory 901, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 900 is configured to read a program in the memory 901 and execute the following process:
  • the CSI fed back by the first terminal is extracted from the CSI fed back by the first terminal and the service data, or the CSI fed back by the first terminal is received by the second terminal.
  • the SCI includes a reserved time node corresponding to the feedback CSI; the processor 900 is specifically configured to:
  • the SCI does not include the reserved time node corresponding to the feedback CSI; the processor 900 is specifically configured to:
  • Receive SCI and CSI that are sent by the first terminal and include indication information used to indicate that the CSI is included in the time slot, and receive CSI fed back by the first terminal from the time slot indicated by the SCI sent by the first terminal.
  • the embodiment of this application also provides a device for reporting channel state information CSI.
  • This device is the device in the method in the embodiment of this application, and the principle of the device to solve the problem is the same as that of the method. Similar, so the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.
  • an embodiment of the present application also provides a device for reporting channel state information CSI.
  • the device includes: a receiving module 1000 and a processing module 1001:
  • the receiving module 1000 is configured to receive the direct link control information SCI sent by the second terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • the processing module 1001 is configured to send the CSI together with the service data to be sent to the second terminal or send the CSI to the second terminal.
  • processing module 1001 is specifically used for:
  • processing module 1001 is also used for:
  • processing module 1001 is also used for:
  • processing module 1001 is specifically used for:
  • the position of the RE occupied by the CSI is agreed upon by the protocol or configured through RRC signaling or pre-configured through RRC signaling.
  • processing module 1001 is also used for:
  • the position of the RE occupied by the configuration CSI and the position of the RE where the demodulation reference signal DMRS is located are separated by N OFDM symbols in the time domain, where N is a natural number.
  • processing module 1001 is also used for:
  • the number of REs configured with CSI mapping is proportional to the number of physical resource blocks PRB occupied by the PSSCH.
  • processing module 1001 is specifically used for:
  • the CSI is sent to the second terminal together with the service data to be sent or the CSI is sent to the second terminal.
  • processing module 1001 is specifically used for:
  • Sending CSI to the second terminal includes:
  • the SCI and CSI containing the indication information used to indicate that the CSI is contained in the time slot are sent to the second terminal.
  • an embodiment of the present application also provides a device for reporting channel state information CSI.
  • the device includes a sending module 1100 and a processing module 1101:
  • the sending module 1100 is configured to send the direct link control information SCI to the first terminal, where the SCI contains an indication message for instructing the first terminal to feedback the channel state;
  • the processing module 1101 is configured to extract the CSI fed back by the first terminal from the CSI fed back by the first terminal and service data, or the second terminal receives the CSI fed back by the first terminal.
  • the SCI includes the reserved time node corresponding to the feedback CSI; the processing module 1101 is specifically used for:
  • the SCI does not include the reserved time node corresponding to the feedback CSI; the processing module 1101 is specifically used for:
  • Receive SCI and CSI that are sent by the first terminal and include indication information used to indicate that the CSI is included in the time slot, and receive CSI fed back by the first terminal from the time slot indicated by the SCI sent by the first terminal.
  • An embodiment of the present application further provides a computer-readable non-volatile storage medium, including program code, when the program code runs on a computing terminal, the program code is used to make the computing terminal execute the implementation of the present application.
  • a computer-readable non-volatile storage medium including program code, when the program code runs on a computing terminal, the program code is used to make the computing terminal execute the implementation of the present application.
  • this application may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium to be used by the instruction execution system or Used in conjunction with the instruction execution system.
  • a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transmit a program for use by an instruction execution system, device, or device, or in combination with an instruction execution system, Device or equipment use.

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Abstract

本申请公开了一种信道状态信息CSI上报的方法和设备，涉及无线通信技术领域，用以解决现有技术中对于PC5接口单播通信，还未有相应的CSI反馈上报方法的问题，本申请方法包括：第一终端接收第二终端发送的直通链路控制信息SCI，其中，所述SCI包含用于指示所述第一终端反馈信道状态的指示消息；所述第一终端将CSI与需要发送的业务数据一起发送给所述第二终端或将CSI发送给所述第二终端，由于本申请为PC5接口提供了信道状态信息CSI上报的方法，提升了系统性能和资源利用率。

Description

一种信道状态信息CSI上报的方法和设备
相关申请的交叉引用
本申请要求在2019年04月02日提交中国专利局、申请号为201910261915.0、申请名称为“一种信道状态信息CSI上报的方法和设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，特别涉及一种信道状态信息CSI上报的方法和设备。
背景技术
新一代通信模式NR V2X(New Radio Vehicle To Everything，新空口车用无线通信技术)相较于原有的LTE V2X(Long Term Evolution Vehicle To Everything，长期演进的车用无线通信技术)广播通信模式，新增加了单播以及组播通信模式。
在LTE V2X广播通信模式中，没有引入任何反馈信道，均是以盲重传的形式来提升系统的可靠性，但是在NR V2X通信模式中，为了提升系统性能和资源利用率，需要为新增的单播以及组播通信引入相应的PC5接口反馈信道，用以控制发送端的重传或者调整传输方案以适应信道状态。现有技术中，对于PC5接口单播通信反馈CSI的方法，尚没有相应的解决方案。
发明内容
本申请提供一种信道状态信息CSI上报的方法和设备，用以解决现有技术中对于PC5接口单播通信，还未有相应的CSI反馈上报方法的问题。
第一方面，本申请实施例提供的一种信道状态信息CSI上报的方法包括：
第一终端接收第二终端发送的直通链路控制信息SCI，其中，SCI包含用 于指示第一终端反馈信道状态的指示消息；
第一终端将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
上述方法，第一终端接收到第二终端发送的直通链路控制信息SCI时，若确定SCI中包含用于指示第一终端反馈信道状态的指示消息，则第一终端将CSI与需要发送的业务数据一起发送给第二终端，或者将CSI不与业务数据一起，单独发送给第二终端，使得第一终端能够向第二终端上报CSI，实现了NR V2X中的CSI反馈，进而使得第二终端能够根据CSI控制数据重传或者调整传输方案以适应信道状态，从而提升了系统性能和资源利用率。
在一种可能的实现方式中，第一终端将CSI与需要发送的业务数据一起发送，包括：
第一终端将CSI置于MAC CE或RRC信令中与业务数据一起发送给第二终端。
上述方法，第一终端将CSI置于MAC CE或RRC信令中与业务数据一起发送给第二终端，CSI反馈信息的传输方式较为简洁，无需特殊的指示资源映射，资源利用率较高。
在一种可能的实现方式中，第一终端将CSI置于MAC CE中与业务数据一起发送给第二终端，还包括：
第一终端将用于表示携带CSI的PC5接口的MAC子头置于MAC CE中。
在一种可能的实现方式中，用于表示携带CSI的PC5接口的MAC子头为预先定义有MAC子头中LCID与CSI对应关系的MAC子头。
上述方法，第一终端将CSI置于MAC CE中与业务数据一起发送给第二终端，通过预先定义MAC子头中LCID与CSI对应关系，使得第二终端能够根据LCID区分反馈CSI的信息与未反馈CSI的信息。
在一种可能的实现方式中，第一终端将CSI与需要发送的业务数据一起发送给第二终端，包括：
第一终端通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起 发送给第二终端；
其中，CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC信令预配置。
上述方法，第一终端通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端；其中，CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC信令预配置，使得第一终端能够向第二终端上报CSI，实现了NR V2X中的CSI反馈，进而使得第二终端能够根据CSI控制数据重传或者调整传输方案以适应信道状态，从而提升了系统性能和资源利用率。
在一种可能的实现方式中，CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，N为自然数。
上述方法，在第一终端通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端的过程中，配置CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，以便于第二终端从第一终端发送的数据中解码出CSI，提高了第二终端的解码性能。
在一种可能的实现方式中，CSI映射的RE的数量与PSSCH所占用的物理资源块PRB的数量成正比。
上述方法，在第一终端通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端的过程中，配置CSI映射的RE的数量与PSSCH所占用的物理资源块PRB的数量成正比，使得CSI随着PSSCH所占用PRB数量的增加，在频域上重复出现，确保有效的反馈覆盖范围，从而提高CSI反馈的可靠性。
在一种可能的实现方式中，第一终端将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端，包括：
第一终端在SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
上述方法，通过设定预设时间节点，使得第二终端能够知道第一终端在 预设时间节点发送的数据中包含CSI，便于第二终端从第一终端发送的数据中获取第一终端反馈的CSI。另外，CSI不与业务数据一起发送，单独发送时，传输信道中可以承载更多的反馈信息，同时由于占用资源较多，码率相应较低，不但能够保证反馈的准确性，而且映射过程和解码过程相对简单。
在一种可能的实现方式中，第一终端将CSI与需要发送的业务数据一起发送给第二终端，包括：
第一终端将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给第二终端；或
第一终端将CSI发送给第二终端，包括：
第一终端将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给第二终端。
上述方法，通过将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给第二终端，或者将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给第二终端，使得第二终端能够通过包含CSI的指示信息的SCI，准确地从第一终端发送的数据中获取第一终端反馈的CSI。
第二方面，本申请实施例提供的一种信道状态信息CSI上报的方法包括：
第二终端向第一终端发送直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
第二终端从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，或第二终端接收第一终端反馈的CSI。
在一种可能的实现方式中，SCI中包含反馈CSI对应的预约时间节点；
第二终端从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，包括：第二终端从第一终端在SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取第一终端反馈的CSI；
第二终端接收第一终端反馈的CSI，包括：第二终端接收第一终端在SCI包含的预约时间节点到达后反馈的CSI。
在一种可能的实现方式中，SCI中未包含反馈CSI对应的预约时间节点；
第二终端从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，包括：
第二终端接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI、CSI以及业务数据，从第一终端发送的SCI指示的时隙内提取第一终端反馈的CSI；
第二终端接收第一终端反馈的CSI，包括：第二终端接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从第一终端发送的SCI指示的时隙内接收第一终端反馈的CSI。
上述方法，第二终端向第一终端发送直通链路控制信息SCI，其中SCI包含用于指示第一终端反馈信道状态的指示消息，第二终端从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，或第二终端接收第一终端反馈的CSI，使得第一终端能够向第二终端上报CSI，实现了NR V2X中的CSI反馈，进而使得第二终端能够根据CSI控制数据重传或者调整传输方案以适应信道状态，从而提升了系统性能和资源利用率。
第三方面，本申请实施例提供的一种信道状态信息CSI上报的设备，包括：处理器和存储器；其中，处理器，用于读取存储器中的程序并执行下列过程：
接收第二终端发送的直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
在一种可能的实现方式中，处理器具体用于：
将CSI置于MAC CE或RRC信令中与业务数据一起发送给第二终端。
在一种可能的实现方式中，处理器还用于：
将用于表示携带CSI的PC5接口的MAC子头置于MAC CE中。
在一种可能的实现方式中，处理器还用于：
将预先定义有MAC子头中LCID与CSI对应关系的MAC子头置于MAC CE中。
在一种可能的实现方式中，处理器具体用于：
通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端；
其中，CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC信令预配置。
在一种可能的实现方式中，处理器还用于：
配置CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，N为自然数。
在一种可能的实现方式中，处理器还用于：
配置CSI映射的RE的数量与PSSCH所占用的物理资源块PRB的数量成正比。
在一种可能的实现方式中，处理器具体用于：
SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
在一种可能的实现方式中，处理器具体用于：
将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给第二终端；或
将CSI发送给第二终端，包括：
将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给第二终端。
第四方面，本申请实施例提供的一种信道状态信息CSI上报的设备，包括：处理器和存储器；其中，处理器，用于读取存储器中的程序并执行下列过程：
向第一终端发送直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，或第二终端接收第一终端反馈的CSI。
在一种可能的实现方式中，SCI中包含反馈CSI对应的预约时间节点；处理器具体用于：
从第一终端在SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取第一终端反馈的CSI；或者
接收第一终端在SCI包含的预约时间节点到达后反馈的CSI。
在一种可能的实现方式中，SCI中未包含反馈CSI对应的预约时间节点；处理器具体用于：
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI、CSI以及业务数据，从第一终端发送的SCI指示的时隙内提取第一终端反馈的CSI；或者
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从第一终端发送的SCI指示的时隙内接收第一终端反馈的CSI。
第五方面，本申请实施例还提供一种信道状态信息CSI上报的设备，该设备包括接收模块和处理模块：
接收模块，用于接收第二终端发送的直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
处理模块，用于将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
在一种可能的实现方式中，处理模块具体用于：
将CSI置于MAC CE或RRC信令中与业务数据一起发送给第二终端。
在一种可能的实现方式中，处理模块还用于：
将用于表示携带CSI的PC5接口的MAC子头置于MAC CE中。
在一种可能的实现方式中，处理模块还用于：
将预先定义有MAC子头中LCID与CSI对应关系的MAC子头置于MAC CE中。
在一种可能的实现方式中，处理模块具体用于：
通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端；
其中，CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC信令预配置。
在一种可能的实现方式中，处理模块还用于：
配置CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，N为自然数。
在一种可能的实现方式中，处理模块还用于：
配置CSI映射的RE的数量与PSSCH所占用的物理资源块PRB的数量成正比。
在一种可能的实现方式中，处理模块具体用于：
SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
在一种可能的实现方式中，处理模块具体用于：
将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给第二终端；或
将CSI发送给第二终端，包括：
将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给第二终端。
第六方面，本申请实施例还提供一种信道状态信息CSI上报的设备，该设备包括发送模块和处理模块：
发送模块，用于向第一终端发送直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
处理模块，用于从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，或第二终端接收第一终端反馈的CSI。
在一种可能的实现方式中，SCI中包含反馈CSI对应的预约时间节点；处 理模块具体用于：
从第一终端在SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取第一终端反馈的CSI；或者
接收第一终端在SCI包含的预约时间节点到达后反馈的CSI。
在一种可能的实现方式中，SCI中未包含反馈CSI对应的预约时间节点；处理模块具体用于：
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI、CSI以及业务数据，从第一终端发送的SCI指示的时隙内提取第一终端反馈的CSI；或者
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从第一终端发送的SCI指示的时隙内接收第一终端反馈的CSI。
第七方面，本申请还提供一种计算机存储介质，其上存储有计算机程序，该程序被处理单元执行时实现第一方面或第二方面方法的步骤。
另外，第三方面至第六方面中任一种实现方式所带来的技术效果可参见第一方面中不同实现方式所带来的技术效果，此处不再赘述。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的一种单播系统的示意图；
图2A为本申请实施例1提供的一种信道状态信息CSI上报流程的示意图；
图2B为本申请实施例1提供的另一信道状态信息CSI上报流程的示意图；
图3为本申请实施例4提供的PSSCH-piggyback方式的原理示意图；
图4为本申请实施例5提供的CSI反馈方式二的原理示意图；
图5为本申请实施例提供的一种信道状态信息CSI上报的方法的示意流 程图；
图6为本申请实施例提供的另一信道状态信息CSI上报的方法的示意流程图；
图7A为本申请实施例提供的一种信道状态信息CSI上报的完整方法流程图；
图7B为本申请实施例提供的另一信道状态信息CSI上报的完整方法流程图；
图8为本申请实施例提供的第一终端的结构示意图；
图9为本申请实施例提供的第二终端的结构示意图；
图10为本申请实施例提供的一种信道状态信息CSI上报的设备的结构示意图；
图11为本申请实施例提供的另一种信道状态信息CSI上报的设备的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例仅仅是本申请一部份实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
下面对文中出现的一些词语进行解释：
1、本申请实施例中术语“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
2、本申请实施例中术语“终端”表示可以上报信道状态信息的通信设备，包括手机、电脑、平板等。
本申请实施例描述的应用场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着新应用场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。其中，在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
新一代通信模式NR V2X相较于原有的LTE V2X广播通信模式，新增加了单播以及组播通信模式。
在LTE V2X广播通信模式中，没有引入任何反馈信道，均是以盲重传的形式来提升系统的可靠性，但是在NR V2X通信模式中，为了提升系统性能和资源利用率，需要为新增的单播以及组播通信引入相应的PC5接口反馈信道，用以控制发送端的重传或者调整传输方案以适应信道状态。现有技术中，对于PC5接口单播通信反馈CSI的方法，尚没有相应的解决方案。
因此，本申请实施例针对NR V2X通信模式提出一种CSI上报方法，可以在V2X PC5接口单播通信时，进行CSI反馈。
针对上述场景，下面结合说明书附图对本申请实施例做进一步详细描述。
如图1所示，本申请实施例的信道状态信息CSI上报的方法，主要涉及两个进行单播通信的终端(当然，也可以是组播通信的两个终端)，具体为：第一终端10和第二终端20。
第一终端10，用于根据配置、预配置、第二终端20发送的SCI指示或者V2X单播连接建立过程的一种或者多种方式确定的CSI反馈方式，将信道状态信息CSI发送给第二终端20。
第二终端20，用于向第一终端10发送SCI指示并接收第一终端10上报的CSI信息和数据。
其中，CSI可以包括CQI(Channel Quality Indicator，信道质量指示)、RI(Rank Indication，秩指示)以及PMI(Precoding Matrix Indicator，预编码矩阵指示)等信息中的一个或者多个。
具体实施时，是否进行CSI反馈，以及采用上述两种方式中哪种反馈方式进行反馈，可以通过配置、预配置、SCI指示或者V2X单播连接建立过程的一种或者多种方式确定。
在进行V2X PC5单播通信需要进行CSI反馈时，向第二终端发送CSI反馈时，有以下两种方式可供选择。
方式一：CSI反馈伴随着业务数据一起发送。
方式二：CSI反馈不与业务数据一起，CSI反馈单独发送。此种方式下，CSI反馈信息可以通过PC5物理层的反馈信道进行承载，也可以通过PSSCH(Physical Sidelink Share Channe，物理Sidelink共享信道)进行承载。优选的，可以通过PSSCH承载CSI的反馈信息。
对于方式一中，CSI反馈信息伴随业务数据一起发送，具体实施方式有如下两种方案：
方案1，PC5接口的CSI反馈信息可以以PC5接口的MAC CE(MAC Control Element，MAC控制元件)信令的方式，与业务数据组合在一起通过PSSCH进行承载，从而进行传输。其中，PC5接口的MAC子头需要预先定义PC5CSI反馈信息对应的LCID(Logical Channel ID，逻辑信道标识)，从而将CSI和业务数据进行区分。
PC5接口的CSI反馈信息还可以以PC5的RRC(Radio Resource Control，无线资源控制)信令的方式，与业务数据组合在一起通过PSSCH进行承载。
方案2：PC5接口的CSI反馈信息的传输以“PSSCH-piggyback”的方式进行。具体来说，将CSI反馈信息直接映射到PSSCH的相应RE(Resource element，资源块)。具体传输时，可以基于预先设置的协议约定、配置、预配置或者SCI指示的方式确定RE中是否进行CSI反馈信息传输，以及确定CSI反馈信息占用的RE的位置。
优选的，携带CSI反馈信息传输的RE分布在DMRS(Demodulation Reference Signal，解调参考信号)附近，以保证解码性能。进一步地，CSI所占用RE的个数与PSSCH占用的PRB的个数成比例增加，即，CSI所占用 RE映射在PSSCH的PRB中的位置固定，且随着PRB个数的增加，在频域上重复出现。
对于方式二，单独发送CSI反馈信息的结构与单独发送数据的结构相似，区别在于单独发送CSI反馈信息不需要单独发送数据时的大size，频域宽度大约取1RBs或者2RBs即可，详情见本申请下述具体实施例。
依据上述两种发送CSI的反馈方式，实际应用中，发送CSI反馈的方式可以有如下三种组合：
组合1，仅使用上述方式一。这种组合下，只有当第一终端有业务数据发送时，CSI反馈才会伴随着业务数据一起发送。如果没有业务数据进行发送，则CSI反馈信息也不反馈。
组合2，方式一&方式二。这种组合下，当需要进行CSI反馈时，第一终端有业务数据发送，则CSI反馈信息会伴随着业务数据一起发送。当需要进行CSI反馈时，第一终端在这个时刻没有业务数据需要发送，则CSI反馈会单独发送。
组合3，仅使用上述方式二，CSI反馈只能单独发送。
需要说明的是，对于上述三种组合中，组合2和组合3中是否允许单独使用方式二发送CSI反馈取决于第一终端的性能。具体来说，业务数据传输中资源的选择过程与发送CSI反馈中资源的选择过程不同，单独发送CSI反馈会额外的增加第一终端的处理复杂度。
举例来说，当CSI反馈通过PSSCH承载发送时，业务数据的资源选择过程中频域资源粒度可以是子信道(频域上包括多个连续的PRB)，而对于CSI反馈来说，包含的信息比特比较少，通常会采用的频域资源的粒度是PRB。也就是说，两种资源选择过程中，感知空闲资源的方法不同，进而导致感知过程更加复杂。综上所述，是否支持CSI反馈单独发送，取决于第一终端的处理能力。
具体实施时，第一终端可以根据接收到的第二终端发送的SCI信息判断何时需要进行CSI反馈。下面结合下述实施例1对此进行详细说明。
实施例1
如图2A所示，第一终端确定何时进行CSI反馈，可以包括但不限于如下步骤：
步骤201，第一终端接收第二终端发送的SCI。
步骤202，第一终端判断SCI中是否包含用于指示第一终端反馈信道状态的指示消息，若是，执行步骤203，否则执行步骤206。
步骤203，第一终端判断SCI中是否包含预约时间节点，若是，执行步骤204，否则执行步骤205。
步骤204，第一终端确定SCI中包含用于指示第一终端反馈信道状态的指示消息、且SCI中包含预约时间节点，则第一终端在预约时间节点到达后，向第二终端发送CSI反馈信息。
具体实施时，第一终端向第二终端发送CSI反馈信息时，可以采用本申请上述实施例所述的三种组合中的任一组合进行发送，具体可以由SCI指定，也可以配置或预配置，也可以根据终端性能进行选择，本申请实施例对此不做限定。
步骤205，第一终端确定SCI中包含用于指示第一终端反馈信道状态的指示消息、且SCI中不包含预约时间节点，则第一终端通过向第二终端发送SCI+CSI的方式向第二终端发送CSI反馈信息，其中，第一终端向第二终端发送的SCI中包含用于指示当前时隙是否包含CSI反馈信息的指示信令。
具体实施时，第一终端向第二终端发送CSI反馈信息时，可以采用本申请上述实施例所述的三种组合中的任一组合进行发送，具体可以由SCI指定，也可以配置或预配置，也可以根据终端性能进行选择，本申请实施例对此不做限定。
步骤206，第一终端确定SCI中不包含用于指示第一终端反馈信道状态的指示消息时，确定无需向第二终端发送CSI反馈消息。
第二终端向第一终端发送包含用于指示第一终端反馈信道状态的指示消息的SCI后，若SCI中包含预约时间节点，则第二终端从第一终端在预约时 间节点到达后发送的消息中获取CSI，若SCI中未包含预约时间节点，则第二终端根据第一终端发送的SCI是否包含指示当前时隙内包含CSI反馈信息的指示信令，获取CSI反馈信息，其具体步骤，如图2B所示，可以包括但不限于：
步骤2001，第二终端向第一终端发送SCI，SCI中包含用于指示第一终端反馈信道状态的指示消息。
步骤2002，第二终端判断SCI中是否包含预约时间节点，若是，执行步骤2003，否则执行步骤2004。
步骤2003，第二终端从第一终端在预约时间节点到达后发送的消息中获取CSI。
步骤2004，第二终端判断第一终端发送的SCI中是否包含指示当前时隙内包含CSI反馈信息的指示信令，若是，执行步骤2005，否则执行步骤2006。
步骤2005，第二终端确定第一终端发送的SCI中包含指示当前时隙内包含CSI反馈信息的指示信令时，从第一终端发送的SCI指示的时隙数据内提取CSI反馈信息。
步骤2006，第二终端确定第一终端发送的SCI中不包含指示当前时隙内包含CSI反馈信息的指示信令时，正常接收第一终端发送的业务数据。
实施例2
本实施例主要介绍采用上述方式一中方案1反馈CSI的流程。若PC5接口的第二终端通过SCI触发了CSI反馈需求，也即第二终端向第一终端发送SCI，且SCI中包含用于指示第一终端反馈信道状态的指示消息，PC5接口的CSI反馈信息以PC5接口的MAC CE信令或者PC5接口的RRC信令的方式，与业务数据组合在一起，并通过PSSCH进行承载传输。
其中，通过MAC CE信令的方式传输CSI反馈信息时，CSI反馈信息是通过PC5接口的MAC子头进行区分的。MAC子头需要定义PC5接口CSI反馈信息对应的LCID。第二终端在收到相应的数据后，提取MAC子头的LCID部分信息，来进行CSI反馈信息的获取。
实施例3
本实施例主要介绍采用上述方式一中方案2反馈触发过程。PC5接口的第二终端通过SCI触发了CSI反馈需求，具体触发方式存在以下两种：
(1)第二终端向第一终端发送的SCI信息中包含触发CSI反馈的指示信令、且包含预约CSI反馈时延t，该SCI信息指示第一终端在经过t毫秒后向第二终端发送CSI反馈信息，此种情况第二终端只需要在特定的时刻进行CSI反馈信息的获取，无需通过第一终端发送的SCI信息去判断CSI反馈信息是否存在。
(2)第二终端向第一终端发送的SCI信息中只包含一个触发CSI反馈的指示信令，第一终端在收到相应反馈CSI指示后，在发送的SCI信息中指示出数据中是否包含有CSI反馈信息，第二终端在收到该SCI信息后，首先判断本次接收的数据中是否包含CSI反馈信息，若包含CSI反馈信息，则进行CSI信息的获取。
实施例4
本实施例主要介绍上述方式一中方案2反馈CSI的流程。以“PSSCH-piggyback”的方式进行CSI反馈信息传输的映射，CSI反馈信息占用的RE位置可以通过协议约定、配置、预配置来设置。以CSI反馈信息传输的RE优选分布在DMRS附近，CSI所占用RE的个数与PSSCH占用的PRB的个数成比例增加为例，如图3所示，以两列DMRS为例，CSI所占用RE以树状对称分布在DMRS的两边，整个PSSCH的每个PRB都采用如图3所示的映射结构，用以保证CSI所占用RE的解码性能和CSI信号在整个时域符号上所占的功率比例不变，从而确定有效的反馈覆盖范围。
实施例5
实施例5以上述方式二为例，当需要进行CSI反馈时，若第一终端在当前时刻没有业务数据需要发送，则选择单独发送CSI反馈。第一终端的业务数据信道只映射CSI反馈信息，整体结构与单独发送业务数据相似，区别在于不需要传输业务数据时所选用的大size，频域宽度为1RBs或2RBs即可满 足需求，如图4所示，由于此时为周期性反馈CSI信息，因此第二终端能够知晓哪些时隙上包含CSI反馈信息，第二终端直接进行解码即可完成CSI反馈信息的获取。
如图5所示，本申请实施例提供的是一种信道状态信息CSI上报的方法，具体包括以下步骤：
步骤501，第一终端接收第二终端发送的直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
步骤502，第一终端将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
可选的，第一终端将CSI与需要发送的业务数据一起发送，包括：
第一终端将CSI置于MAC CE或RRC信令中与业务数据一起发送给第二终端。
可选的，第一终端将CSI置于MAC CE中与业务数据一起发送给第二终端，还包括：
第一终端将用于表示携带CSI的PC5接口的MAC子头置于MAC CE中。
可选的，用于表示携带CSI的PC5接口的MAC子头为预先定义有MAC子头中LCID与CSI对应关系的MAC子头。
可选的，第一终端将CSI与需要发送的业务数据一起发送给第二终端，包括：
第一终端通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端；
其中，CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC信令预配置。
可选的，CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，N为自然数。
可选的，CSI映射的RE的数量与PSSCH所占用的物理资源块PRB的数量成正比。
可选的，第一终端将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端，包括：
第一终端在SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
可选的，第一终端将CSI与需要发送的业务数据一起发送给第二终端，包括：
第一终端将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给第二终端；或
第一终端将CSI发送给第二终端，包括：
第一终端将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给第二终端。
如图6所示，本申请实施例提供的是一种信道状态信息CSI上报的方法，具体包括以下步骤：
步骤601，第二终端向第一终端发送直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
步骤602，第二终端从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，或第二终端接收第一终端反馈的CSI。
可选的，SCI中包含反馈CSI对应的预约时间节点；
第二终端从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，包括：第二终端从第一终端在SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取第一终端反馈的CSI；
第二终端接收第一终端反馈的CSI，包括：第二终端接收第一终端在SCI包含的预约时间节点到达后反馈的CSI。
可选的，SCI中未包含反馈CSI对应的预约时间节点；
第二终端从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，包括：
第二终端接收第一终端发送的包含用于指示时隙内包含CSI的指示信息 的SCI、CSI以及业务数据，从第一终端发送的SCI指示的时隙内提取第一终端反馈的CSI；
第二终端接收第一终端反馈的CSI，包括：第二终端接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从第一终端发送的SCI指示的时隙内接收第一终端反馈的CSI。
下面结合图7A和图7B，对本申请实施例提供的信道状态信息CSI上报方法进行详细说明。
如图7A所示，以第二终端向第一终端发送的SCI中包含用于指示第一终端反馈信道状态的指示消息，不包含预约时间节点为例，本申请实施例提供的一种信道状态信息CSI上报的方法，具体包括以下步骤：
步骤700，第二终端向第一终端发送SCI，SCI中包含用于指示第一终端反馈信道状态的指示消息，不包含预约时间节点。
步骤701，第一终端接收到第二终端发送的SCI后，确定SCI中不包含预约时间节点，则第一终端确定通过SCI+CSI的方式向第二终端发送CSI反馈信息，其中，第一终端向第二终端发送的SCI中包含用于指示当前时隙数据中是否包含CSI反馈信息的指示信令。
步骤702，第一终端在确定需要发送CSI反馈信息时，将包含用于指示当前时隙数据中包含CSI反馈信息的指示信令的SCI、CSI反馈信息以及业务数据一起发送给第二终端。
当然，需要说明的是，步骤702中在确定需要发送CSI反馈信息时，也可以将包含用于指示当前时隙数据中包含CSI反馈信息的指示信令的SCI和CSI反馈信息一起发送给第二终端。
步骤703，第二终端接收到第一终端发送的包含用于指示当前时隙数据中包含CSI反馈信息的指示信令的SCI、CSI、以及业务数据时，根据第一终端发送的SCI的指示确定当前时隙数据中包括CSI反馈信息，则第二终端从当前时隙数据中提取CSI反馈信息。
如图7B所示，以第二终端向第一终端发送的SCI中包含用于指示第一终 端反馈信道状态的指示消息，且包含预约时间节点为例，本申请实施例提供的一种信道状态信息CSI上报的方法，具体包括以下步骤：
步骤7000，第二终端向第一终端发送SCI，SCI中包含用于指示第一终端反馈信道状态的指示消息，且包含预约时间节点。
步骤7001，第一终端接收到第二终端发送的SCI后，确定SCI中包含预约时间节点，则第一终端确定在预约时间节点到达后向第二终端发送CSI反馈信息。
步骤7002，预约时间节点到达后，第一终端将CSI反馈信息与业务数据一起发送给第二终端，或者将CSI反馈信息单独发送给第二终端。
步骤7003，第二终端从第一终端在预约时间节点到达后发送的信息中获取CSI反馈信息。
基于相同的发明构思，本申请实施例中还提供了一种信道状态信息CSI上报的设备，由于该设备即是本申请实施例中的方法中的设备，并且该设备解决问题的原理与该方法相似，因此该设备的实施可以参见方法的实施，重复之处不再赘述。
如图8所示，本申请实施例第一终端包括：处理器800、存储器801和收发机802。
处理器800负责管理总线架构和通常的处理，存储器801可以存储处理器800在执行操作时所使用的数据。收发机802用于在处理器800的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器800代表的一个或多个处理器和存储器801代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器800负责管理总线架构和通常的处理，存储器801可以存储处理器800在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器800中，或者由处理器800 实现。在实现过程中，信号处理流程的各步骤可以通过处理器800中的硬件的集成逻辑电路或者软件形式的指令完成。处理器800可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器801，处理器800读取存储器801中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器800，用于读取存储器801中的程序并执行下列过程：
接收第二终端发送的直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
可选的，处理器800具体用于：
将CSI置于MAC CE或RRC信令中与业务数据一起发送给第二终端。
可选的，处理器800还用于：
将用于表示携带CSI的PC5接口的MAC子头置于MAC CE中。
可选的，处理器800还用于：
将预先定义有MAC子头中LCID与CSI对应关系的MAC子头置于MAC CE中。
可选的，处理器800具体用于：
通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端；
其中，CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC 信令预配置。
可选的，处理器800还用于：
配置CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，N为自然数。
可选的，处理器800还用于：
配置CSI映射的RE的数量与PSSCH所占用的物理资源块PRB的数量成正比。
可选的，处理器800具体用于：
SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
可选的，处理器800具体用于：
将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给第二终端；或
将CSI发送给第二终端，包括：
将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给第二终端。
基于相同的发明构思，本申请实施例中还提供了一种信道状态信息CSI上报的设备，由于该设备即是本申请实施例中的方法中的设备，并且该设备解决问题的原理与该方法相似，因此该设备的实施可以参见方法的实施，重复之处不再赘述。
如图9所示，本申请实施例第二终端包括：处理器900、存储器901和收发机902。
处理器900负责管理总线架构和通常的处理，存储器901可以存储处理器900在执行操作时所使用的数据。收发机902用于在处理器900的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器900代表的一个或多个处理器和存储器901代表的存储器的各种电路链接在一起。总 线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器900负责管理总线架构和通常的处理，存储器901可以存储处理器900在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器900中，或者由处理器900实现。在实现过程中，信号处理流程的各步骤可以通过处理器900中的硬件的集成逻辑电路或者软件形式的指令完成。处理器900可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器901，处理器900读取存储器901中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器900，用于读取存储器901中的程序并执行下列过程：
向第一终端发送直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，或第二终端接收第一终端反馈的CSI。
可选的，SCI中包含反馈CSI对应的预约时间节点；处理器900具体用于：
从第一终端在SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取第一终端反馈的CSI；或者
接收第一终端在SCI包含的预约时间节点到达后反馈的CSI。
可选的，SCI中未包含反馈CSI对应的预约时间节点；处理器900具体用于：
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI、CSI以及业务数据，从第一终端发送的SCI指示的时隙内提取第一终端反馈的CSI；或者
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从第一终端发送的SCI指示的时隙内接收第一终端反馈的CSI。
基于相同的发明构思，本申请实施例中还提供了一种信道状态信息CSI上报的设备，由于该设备即是本申请实施例中的方法中的设备，并且该设备解决问题的原理与该方法相似，因此该设备的实施可以参见方法的实施，重复之处不再赘述。
如图10所示，本申请实施例还提供一种信道状态信息CSI上报的设备，该设备包括：接收模块1000和处理模块1001：
接收模块1000，用于接收第二终端发送的直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
处理模块1001，用于将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
可选的，处理模块1001具体用于：
将CSI置于MAC CE或RRC信令中与业务数据一起发送给第二终端。
可选的，处理模块1001还用于：
将用于表示携带CSI的PC5接口的MAC子头置于MAC CE中。
可选的，处理模块1001还用于：
将预先定义有MAC子头中LCID与CSI对应关系的MAC子头置于MAC CE中。
可选的，处理模块1001具体用于：
通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给第二终端；
其中，CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC信令预配置。
可选的，处理模块1001还用于：
配置CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，N为自然数。
可选的，处理模块1001还用于：
配置CSI映射的RE的数量与PSSCH所占用的物理资源块PRB的数量成正比。
可选的，处理模块1001具体用于：
SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给第二终端或将CSI发送给第二终端。
可选的，处理模块1001具体用于：
将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给第二终端；或
将CSI发送给第二终端，包括：
将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给第二终端。
如图11所示，本申请实施例还提供一种信道状态信息CSI上报的设备，该设备包括：发送模块1100和处理模块1101：
发送模块1100，用于向第一终端发送直通链路控制信息SCI，其中，SCI包含用于指示第一终端反馈信道状态的指示消息；
处理模块1101，用于从第一终端反馈的CSI与业务数据中提取第一终端反馈的CSI，或第二终端接收第一终端反馈的CSI。
可选的，SCI中包含反馈CSI对应的预约时间节点；处理模块1101具体用于：
从第一终端在SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取第一终端反馈的CSI；或者
接收第一终端在SCI包含的预约时间节点到达后反馈的CSI。
可选的，SCI中未包含反馈CSI对应的预约时间节点；处理模块1101具 体用于：
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI、CSI以及业务数据，从第一终端发送的SCI指示的时隙内提取第一终端反馈的CSI；或者
接收第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从第一终端发送的SCI指示的时隙内接收第一终端反馈的CSI。
本申请实施例还提供一种计算机可读非易失性存储介质，包括程序代码，当所述程序代码在计算终端上运行时，所述程序代码用于使所述计算终端执行上述本申请实施例信道状态信息CSI上报的方法的步骤。
以上参照示出根据本申请实施例的方法、装置(系统)和/或计算机程序产品的框图和/或流程图描述本申请。应理解，可以通过计算机程序指令来实现框图和/或流程图示图的一个块以及框图和/或流程图示图的块的组合。可以将这些计算机程序指令提供给通用计算机、专用计算机的处理器和/或其它可编程数据处理装置，以产生机器，使得经由计算机处理器和/或其它可编程数据处理装置执行的指令创建用于实现框图和/或流程图块中所指定的功能/动作的方法。
相应地，还可以用硬件和/或软件(包括固件、驻留软件、微码等)来实施本申请。更进一步地，本申请可以采取计算机可使用或计算机可读存储介质上的计算机程序产品的形式，其具有在介质中实现的计算机可使用或计算机可读程序代码，以由指令执行系统来使用或结合指令执行系统而使用。在本申请上下文中，计算机可使用或计算机可读介质可以是任意介质，其可以包含、存储、通信、传输、或传送程序，以由指令执行系统、装置或设备使用，或结合指令执行系统、装置或设备使用。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (25)

  1. 一种信道状态信息CSI上报的方法，其特征在于，该方法包括：
    第一终端接收第二终端发送的直通链路控制信息SCI，其中，所述SCI包含用于指示所述第一终端反馈信道状态的指示消息；
    所述第一终端将CSI与需要发送的业务数据一起发送给所述第二终端或将CSI发送给所述第二终端。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端将CSI与需要发送的业务数据一起发送，包括：
    所述第一终端将CSI置于MAC控制元件MAC CE或无线资源控制RRC信令中与业务数据一起发送给所述第二终端。
  3. 根据权利要求2所述的方法，其特征在于，所述第一终端将CSI置于MAC CE中与业务数据一起发送给所述第二终端，还包括：
    所述第一终端将用于表示携带CSI的PC5接口的MAC子头置于所述MAC CE中。
  4. 根据权利要求3所述的方法，其特征在于，所述用于表示携带CSI的PC5接口的MAC子头为预先定义有MAC子头中逻辑信道标识LCID与CSI对应关系的MAC子头。
  5. 根据权利要求1所述的方法，其特征在于，所述第一终端将CSI与需要发送的业务数据一起发送给所述第二终端，包括：
    所述第一终端通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给所述第二终端；
    其中，所述CSI占用的RE的位置是协议约定或通过RRC信令配置或通过RRC信令预配置。
  6. 根据权利要求5所述的方法，其特征在于，所述CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个正交频分复用OFDM符号，N为自然数。
  7. 根据权利要求5所述的方法，其特征在于，所述CSI映射的RE的数量与所述PSSCH所占用的物理资源块PRB的数量成正比。
  8. 根据权利要求1所述的方法，其特征在于，所述第一终端将CSI与需要发送的业务数据一起发送给所述第二终端或将CSI发送给所述第二终端，包括：
    所述第一终端在所述SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给所述第二终端或将CSI发送给所述第二终端。
  9. 根据权利要求1所述的方法，其特征在于，所述第一终端将CSI与需要发送的业务数据一起发送给所述第二终端，包括：
    所述第一终端将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给所述第二终端；或
    所述第一终端将CSI发送给所述第二终端，包括：
    所述第一终端将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给所述第二终端。
  10. 一种信道状态信息CSI上报的方法，其特征在于，该方法包括：
    第二终端向第一终端发送直通链路控制信息SCI，其中，所述SCI包含用于指示所述第一终端反馈信道状态的指示消息；
    所述第二终端从所述第一终端反馈的CSI与业务数据中提取所述第一终端反馈的CSI，或所述第二终端接收所述第一终端反馈的CSI。
  11. 根据权利要求10所述的方法，其特征在于，所述SCI中包含反馈CSI对应的预约时间节点；
    所述第二终端从所述第一终端反馈的CSI与业务数据中提取所述第一终端反馈的CSI，包括：所述第二终端从所述第一终端在所述SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取所述第一终端反馈的CSI；
    所述第二终端接收所述第一终端反馈的CSI，包括：所述第二终端接收所述第一终端在所述SCI包含的预约时间节点到达后反馈的CSI。
  12. 根据权利要求10所述的方法，其特征在于，所述SCI中未包含反馈 CSI对应的预约时间节点；
    所述第二终端从所述第一终端反馈的CSI与业务数据中提取所述第一终端反馈的CSI，包括：
    所述第二终端接收所述第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI、CSI以及业务数据，从所述第一终端发送的SCI指示的时隙内提取所述第一终端反馈的CSI；
    所述第二终端接收所述第一终端反馈的CSI，包括：所述第二终端接收所述第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从所述第一终端发送的SCI指示的时隙内接收所述第一终端反馈的CSI。
  13. 一种信道状态信息CSI上报的设备，其特征在于，该设备包括：处理器和存储器；
    其中，处理器，用于读取存储器中的程序并执行下列过程：
    接收第二终端发送的直通链路控制信息SCI，其中，所述SCI包含用于指示所述第一终端反馈信道状态的指示消息；
    将CSI与需要发送的业务数据一起发送给所述第二终端或将CSI发送给所述第二终端。
  14. 根据权利要求13所述的设备，其特征在于，所述处理器具体用于：
    将CSI置于MAC CE或RRC信令中与业务数据一起发送给所述第二终端。
  15. 根据权利要求14所述的设备，其特征在于，所述处理器还用于：
    将用于表示携带CSI的PC5接口的MAC子头置于所述MAC CE中。
  16. 根据权利要求15所述的设备，其特征在于，所述处理器具体用于：
    将预先定义有MAC子头中LCID与CSI对应关系的MAC子头置于所述MAC CE中。
  17. 根据权利要求13所述的设备，其特征在于，所述处理器具体用于：
    通过PSSCH-piggyback形式将CSI与需要发送的业务数据一起发送给所述第二终端；
    其中，所述CSI占用的RE的位置是协议约定或通过RRC信令配置或通 过RRC信令预配置。
  18. 根据权利要求17所述的设备，其特征在于，所述处理器还用于：
    配置所述CSI占用的RE的位置与解调参考信号DMRS所在RE的位置之间在时域上间隔N个OFDM符号，N为自然数。
  19. 根据权利要求17所述的设备，其特征在于，所述处理器还用于：
    配置所述CSI映射的RE的数量与所述PSSCH所占用的物理资源块PRB的数量成正比。
  20. 根据权利要求13所述的设备，其特征在于，所述处理器具体用于：
    所述SCI包含的预约时间节点到达后，将CSI与需要发送的业务数据一起发送给所述第二终端或将CSI发送给所述第二终端。
  21. 根据权利要求13所述的设备，其特征在于，所述处理器具体用于：
    将包含用于指示时隙内包含CSI的指示信息的SCI、CSI与需要发送的业务数据一起发送给所述第二终端；或
    将CSI发送给所述第二终端，包括：
    将包含用于指示时隙内包含CSI的指示信息的SCI和CSI发送给所述第二终端。
  22. 一种信道状态信息CSI上报的设备，其特征在于，该设备包括：处理器和存储器；
    其中，处理器，用于读取存储器中的程序并执行下列过程：
    向第一终端发送直通链路控制信息SCI，其中，所述SCI包含用于指示所述第一终端反馈信道状态的指示消息；
    从所述第一终端反馈的CSI与业务数据中提取所述第一终端反馈的CSI，或所述第二终端接收所述第一终端反馈的CSI。
  23. 根据权利要求22所述的设备，其特征在于，所述SCI中包含反馈CSI对应的预约时间节点；所述处理器具体用于：
    从所述第一终端在所述SCI包含的预约时间节点到达后反馈的CSI与业务数据中提取所述第一终端反馈的CSI；或者
    接收所述第一终端在所述SCI包含的预约时间节点到达后反馈的CSI。
  24. 根据权利要求22所述的设备，其特征在于，所述SCI中未包含反馈CSI对应的预约时间节点；所述处理器具体用于：
    接收所述第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI、CSI以及业务数据，从所述第一终端发送的SCI指示的时隙内提取所述第一终端反馈的CSI；或者
    接收所述第一终端发送的包含用于指示时隙内包含CSI的指示信息的SCI和CSI，从所述第一终端发送的SCI指示的时隙内接收所述第一终端反馈的CSI。
  25. 一种计算机存储介质，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现如权利要求1～9任一所述方法的步骤或如权利要求10～12任一所述方法的步骤。
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