WO2024000164A1 - Procédé et appareil de rapport de csi, procédé et appareil de réception de csi, dispositif et support de stockage - Google Patents

Procédé et appareil de rapport de csi, procédé et appareil de réception de csi, dispositif et support de stockage Download PDF

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Publication number
WO2024000164A1
WO2024000164A1 PCT/CN2022/101933 CN2022101933W WO2024000164A1 WO 2024000164 A1 WO2024000164 A1 WO 2024000164A1 CN 2022101933 W CN2022101933 W CN 2022101933W WO 2024000164 A1 WO2024000164 A1 WO 2024000164A1
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Prior art keywords
csi
port
different
resource
sets
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PCT/CN2022/101933
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English (en)
Chinese (zh)
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陈文洪
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/101933 priority Critical patent/WO2024000164A1/fr
Publication of WO2024000164A1 publication Critical patent/WO2024000164A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • This application relates to the field of mobile communications, and in particular to a channel state information (Channel-Slate Information, CSI) reporting method, receiving method, device, equipment and storage medium.
  • CSI Channel State Information
  • New Radio New Radio
  • TRP Transmission/Reception Point
  • Downlink coherent joint transmission is generally based on an ideal backhaul link.
  • Multiple TRPs use different beams and/or precoding matrices to send the same data on the same physical resources. By adjusting the precoding matrix, the data sent by different TRPs can be transmitted to the terminal. Coherent superposition is performed on both sides to improve data transmission performance.
  • the embodiments of the present application provide a CSI reporting method, receiving method, device, equipment and storage medium, and provide a technical solution for terminals to perform CSI feedback in a downlink coherent joint transmission scenario.
  • the technical solutions are as follows:
  • a CSI reporting method is provided.
  • the method is executed by a terminal.
  • the method includes:
  • CSI measurements are performed based on multiple CSI Reference Signal (CSI-RS) port sets, which are different port combinations within a CSI-RS resource or a CSI-RS resource set.
  • CSI-RS CSI Reference Signal
  • a CSI receiving method is provided, the method is performed by a network device, and the method includes:
  • Configuring multiple CSI-RS port sets the multiple CSI-RS port sets being different port combinations within one CSI-RS resource or different CSI-RS resources within one CSI-RS resource set;
  • a CSI reporting device includes:
  • a measurement module configured to perform CSI measurements based on multiple CSI-RS port sets, where the multiple CSI-RS port sets are different port combinations within one CSI-RS resource or different CSI within one CSI-RS resource set. -RS resources;
  • a reporting module is configured to report indication information of a target port set among the plurality of CSI-RS port sets, and CSI corresponding to the target port set.
  • a CSI receiving device includes:
  • a configuration module configured to configure multiple CSI-RS port sets, where the multiple CSI-RS port sets are different port combinations within one CSI-RS resource or different CSI-RS resources within one CSI-RS resource set;
  • a receiving module configured to receive indication information of a target port set among the plurality of CSI-RS port sets, and CSI corresponding to the target port set.
  • a terminal includes: a processor and a memory. At least one program is stored in the memory. The at least one program is loaded and executed by the terminal to implement the above. The CSI reporting method described above.
  • a network device includes: a processor and a memory. At least one program is stored in the memory. The at least one program is loaded and executed by the network device to Implement the CSI receiving method as described above.
  • a computer-readable storage medium stores at least one program.
  • the at least one program is loaded and executed by a communication device to implement the CSI reporting as described above. method, and/or, the CSI receiving method as described above.
  • a chip is provided, the chip including programmable logic circuits and/or program instructions, and a computer device equipped with the chip is used to implement the CSI reporting method as described above, and/or , the CSI receiving method as described above.
  • a computer program product is provided.
  • the communication device When the computer program product is run on (the processor of) a communication device, the communication device performs the CSI reporting method as described above, and/or, as described above CSI receiving method.
  • the network device can select the current best CJT transmission scheme to improve the performance of downlink transmission.
  • Figure 1 is a structural block diagram of a communication system provided by an exemplary embodiment of the present application.
  • Figure 2 is a flow chart of a CSI reporting method provided by an exemplary embodiment of the present application.
  • Figure 3 is a flow chart of a CSI receiving method provided by an exemplary embodiment of the present application.
  • Figure 4 is a flow chart of a CSI reporting method provided by an exemplary embodiment of the present application.
  • Figure 5 is a time-frequency diagram of a CSI-RS resource (including multiple port subsets) provided by an exemplary embodiment of the present application;
  • Figure 6 is a time-frequency diagram of a CSI-RS resource (including multiple port subsets) provided by an exemplary embodiment of the present application;
  • Figure 7 is a flow chart of a CSI reporting method provided by an exemplary embodiment of the present application.
  • Figure 8 is a time-frequency diagram of CSI-RS resource 1 provided by an exemplary embodiment of the present application.
  • Figure 9 is a time-frequency diagram of CSI-RS resource 2 provided by an exemplary embodiment of the present application.
  • Figure 10 is a time-frequency diagram of CSI-RS resource 3 provided by an exemplary embodiment of the present application.
  • Figure 11 is a time-frequency diagram of CSI-RS resource 4 provided by an exemplary embodiment of the present application.
  • Figure 12 is a time-frequency diagram of CSI-RS resource 5 provided by an exemplary embodiment of the present application.
  • Figure 13 is a time-frequency diagram of CSI-RS resource 6 provided by an exemplary embodiment of the present application.
  • Figure 14 is a time-frequency diagram of CSI-RS resource 7 provided by an exemplary embodiment of the present application.
  • Figure 15 is a time-frequency schematic diagram of CSI-RS resource 8 provided by an exemplary embodiment of the present application.
  • Figure 16 is a structural block diagram of a CSI reporting device provided by an exemplary embodiment of the present application.
  • Figure 17 is a structural block diagram of a CSI receiving device provided by an exemplary embodiment of the present application.
  • Figure 18 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • FIG. 1 shows a structural block diagram of a communication system provided by an exemplary embodiment of the present application.
  • the communication system may include: a terminal 10 and at least two TRPs.
  • the number of terminals 10 is usually multiple.
  • the terminal 10 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with wireless communication functions, as well as various forms of user equipment (User Equipment, UE), mobile stations ( Mobile Station, MS) and so on.
  • UE User Equipment
  • MS Mobile Station
  • TRP is a device deployed in the access network to provide wireless communication functions for the terminal 10.
  • TRPs can be multiple TRPs, such as TRP1, TPR2,..., TRPn.
  • TRP can be used for frequency range 1 (Frequency Range 1, FR1) or frequency range 2 (Frequency Range 2, FR2).
  • the terminal 10 communicates with at least two TRPs through receiving beams and/or transmitting beams.
  • the beam used by TRP can be indicated by a Transceiver Configuration Indicator (TCI).
  • TCI Transceiver Configuration Indicator
  • Multiple TRPs can belong to the same network device or different network devices.
  • the "5G NR system" in the embodiments of this application may also be called a 5G system or an NR system, but those skilled in the art can understand its meaning.
  • the technical solution described in the embodiments of this application can be applied to the 5G NR system, and can also be applied to the subsequent evolution system of the 5G NR system.
  • the terminal In order to enable data sent by different TRPs to be coherently superimposed at the receiving end, the terminal needs to feed back the CSI of different TRPs based on the CJT transmission hypothesis. Specifically, the terminal can feed back a rank indicator (Rank Indicator, RI), one or more precoding matrix indicators (Precoding-Matrix Indicator, PMI) and a channel quality indicator (Channel-Quality Indicator, CQI) in the CSI, where , PMI can contain the precoding information of multiple TRPs, so that when the network device uses these precoding information for precoding, the effect of coherent joint transmission can be achieved. For example, the terminal may put the precoding information of multiple TRPs in one PMI for feedback, or may put the precoding information of multiple TRPs for feedback in multiple PMIs respectively.
  • RI rank Indicator
  • PMI Precoding-Matrix Indicator
  • CQI Channel quality indicator
  • PMI can contain the precoding information of multiple TRPs, so that when the network
  • the CSI reported by the terminal is measured based on the CSI-RS resources configured by the network device.
  • the network device can configure a CSI-RS resource, and each port combination in the CSI-RS resource corresponds to a TRP or a TRP combination (as shown in the embodiment of Figure 4); or, configure multiple CSI-RS resources, each The CSI-RS resource corresponds to a TRP or a TRP combination (as shown in the embodiment shown in Figure 5).
  • Each TRP combination corresponds to a CJT transmission hypothesis, and the terminal performs CSI measurements based on these CSI-RS resources and the CJT transmission hypothesis.
  • the network device can configure one or more CSI-RS resource sets for CJT CSI measurement through RRC signaling.
  • Each CSI-RS resource set contains multiple CSI-RS resources (for example, different resources correspond to different TRPs).
  • Each CSI-RS resource includes time domain resource configuration, frequency domain resource configuration, port number (can be configured with 1, 2, 4, 8, 12, 16, 20, 24, 32, etc.), sequence configuration, power configuration ( P_offset), TCI status and other parameters.
  • the network device can also configure only one CSI-RS resource.
  • Different CSI-RS port combinations on the CSI-RS resource can correspond to different TRPs or TRP combinations.
  • the terminal can perform CJT based on one CSI-RS resource. Measurement.
  • Figure 2 shows a flow chart of a CSI reporting method provided by an exemplary embodiment of the present application.
  • the method is exemplified by executing it from the terminal.
  • the method includes:
  • Step 202 Perform CSI measurements based on multiple CSI-RS port sets respectively.
  • the multiple CSI-RS port sets are different CSI-RS port combinations within one CSI-RS resource or different CSI-RS port combinations within one CSI-RS resource set.
  • each CSI-RS port set is a CSI-RS port combination within a CSI-RS resource, and different CSI-RS port sets are different CSI-RS port combinations; or, each CSI-RS port set is A CSI-RS port on one CSI-RS resource within a CSI-RS resource set, and different CSI-RS port sets are CSI-RS ports on different CSI-RS resources.
  • Each CSI-RS port set in the multiple CSI-RS port sets includes: at least one port subset, and each port subset in the at least one port subset includes n consecutive CSI-RS ports; where n is greater than an integer of 1.
  • Each port subset corresponds to a TRP.
  • a CSI-RS port set includes only one port subset, it corresponds to a single TRP transmission scenario; when a CSI-RS port set includes two port subsets, it corresponds to a CJT transmission scenario with 2 TRPs; When a CSI-RS port set includes multiple port subsets, it corresponds to the scenario of multiple TRPs performing CJT transmission.
  • the port subset ⁇ 0,1,2,3 ⁇ is the CSI-RS port transmitted by TRP0
  • the port subset ⁇ 4,5,6,7 ⁇ is the CSI-RS port transmitted by TRP1
  • the port subset ⁇ 8,9,10,11 ⁇ is the CSI-RS port transmitted by TRP2
  • the port subset ⁇ 12,13,14,15 ⁇ is the CSI-RS port transmitted by TRP3, then:
  • CSI-RS port combination 1 includes ⁇ 0,1,2,3 ⁇ , corresponding to the independent transmission assumption of TRP0;
  • CSI-RS port combination 2 includes ⁇ 4,5,6,7 ⁇ , corresponding to the independent transmission assumption of TRP1;
  • CSI-RS port combination 3 includes ⁇ 8,9,10,11 ⁇ , corresponding to the independent transmission assumption of TRP2;
  • CSI-RS port combination 4 includes ⁇ 12, 13, 14, 15 ⁇ , corresponding to the independent transmission assumption of TRP3;
  • CSI-RS port combination 5 includes ⁇ 0,1,2,3,4,5,6,7 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP1;
  • CSI-RS port combination 6 includes ⁇ 0,1,2,3,8,9,10,11 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP2;
  • CSI-RS port combination 7 includes ⁇ 0,1,2,3,12,13,14,15 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP3;
  • CSI-RS port combination 8 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11 ⁇ , corresponding to the transmission assumption of CJT between TRP0, TRP1 and TRP2;
  • CSI-RS port combination 9 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ⁇ , corresponding to TRP0, TRP1, TRP2 and TRP3
  • CSI-RS resource 1 includes ⁇ 0,1,2,3 ⁇ , corresponding to the independent transmission assumption of TRP0;
  • CSI-RS resource 2 includes ⁇ 4,5,6,7 ⁇ , corresponding to the independent transmission assumption of TRP1;
  • CSI-RS resource 3 includes ⁇ 8,9,10,11 ⁇ , corresponding to the independent transmission assumption of TRP2;
  • CSI-RS resource 4 includes ⁇ 12, 13, 14, 15 ⁇ , corresponding to the independent transmission assumption of TRP3;
  • CSI-RS resource 5 includes ⁇ 0,1,2,3,4,5,6,7 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP1;
  • CSI-RS resource 6 includes ⁇ 0,1,2,3,8,9,10,11 ⁇ , corresponding to the CJT transmission hypothesis between TRP0 and TRP2;
  • CSI-RS resource 7 includes ⁇ 0,1,2,3,12,13,14,15 ⁇ , corresponding to the CJT transmission hypothesis between TRP0 and TRP3;
  • CSI-RS resource 8 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11 ⁇ , corresponding to the transmission hypothesis of CJT between TRP0, TRP1 and TRP2;
  • CSI-RS resource 9 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ⁇ , corresponding to TRP0, TRP1, TRP2 and TRP3 Make transmission assumptions for CJT.
  • the port number range of the CSI-RS port is [3000, 4000].
  • the port number "0-15" in the above example is used to represent the i-th CSI-RS port.
  • the actual port number of the i-th CSI-RS port is one of [3000, 4000].
  • the actual port number of different CSI-RS ports The port numbers are different, and the actual port numbers of different CSI-RS ports are continuous or discontinuous. This article only uses the port numbers "0-15" for illustrative purposes, and does not represent the actual port numbers of the CSI-RS ports.
  • the number of port subsets in different CSI-RS port sets is not exactly the same; or, there are at least two CSI-RS port sets with different numbers of port subsets; or, there are at least two CSI-RS
  • the CJT transmission assumptions corresponding to the port sets are different.
  • the CJT transmission assumption is based on the assumption that at least two TRPs are transmitted.
  • different CSI-RS port sets include the same port subset; or different CSI-RS port sets include port subsets that occupy the same resources; or, in the CJT transmission hypothesis corresponding to different CSI-RS port sets The same TRP exists.
  • each port subset is configured with an independent P_offset; where P_offset is the power difference between the CSI-RS port in the port subset and the physical downlink shared channel (Physical Downlink Shared CHannel, PDSCH).
  • the P_offset is configured by the network device to the terminal. Different port subsets correspond to different TRPs, and different port subsets correspond to different P_offsets.
  • the terminal uses the i-th P_offset to perform CSI measurement on the i-th port subset.
  • the i-th P_offset is the P_offset corresponding to the i-th port subset.
  • each port subset is configured with an independent Transceiver Configuration Indicator (TCI) status.
  • TCI status is configured by the network device to the terminal.
  • Different port subsets correspond to different TRPs, and different port subsets correspond to different TCI states (ie, beams).
  • TCI states ie, beams.
  • the terminal uses the i-th TCI state to perform CSI measurement on the i-th port subset.
  • the i-th TCI state is the TCI state corresponding to the i-th port subset.
  • the terminal when multiple CSI-RS port sets are different CSI-RS port combinations within one CSI-RS resource, the terminal performs CSI measurements on the CSI-RS port combinations configured by the network device; in some embodiments , the terminal performs CSI measurements on all possible CSI-RS port combinations.
  • the terminal When different CSI-RS port combinations within one CSI-RS resource are configured by the network device, the terminal receives configuration signaling from the network device, and the configuration signaling carries configuration information of different CSI-RS port combinations.
  • the network device configures different CSI-RS port combinations within a CSI-RS resource to the terminal.
  • different CSI-RS port combinations are configured using the index of the port subset.
  • the index of port subset 0-1 is expressed as 0,1,2,3.
  • the above CSI-RS port combination 1 is expressed as a set of index combinations of port subsets ⁇ 0 ⁇
  • the above CSI-RS port combination 6 is expressed as a set of index combinations ⁇ 0 ⁇ .
  • Index combination ⁇ 0, 2 ⁇ for the group port subset.
  • an index combination of a set of port subsets to represent all possible combinations of the indexes of these port subsets, such as a set of index combinations of port subsets ⁇ 0, 1, 2 ⁇ represents: 0, 1 , 2, 0+1, 0+2, 1+2, 0+1+2, a total of 7 combinations.
  • CSI-RS port combinations are indicated using a bitmap, and each bit in the bitmap is used to indicate a CSI-RS port combination. For example, there are 9 CSI-RS port combinations, then The bitmap includes 9 bits. When the i-th bit is the first value, it is used to activate or indicate that the i-th CSI-RS port combination is the port combination that needs to be measured; when the i-th bit is the second value, Used to deactivate or not indicate that the i-th CSI-RS port combination is the port combination that needs to be measured, i is an integer not greater than 9. For example, "111000000” represents activating the first three CSI-RS port combinations, and "111100001" represents activating the first four CSI-RS port combinations and the last CSI-RS port combination.
  • Step 204 Report the indication information of the target port set among the multiple CSI-RS port sets, and the CSI corresponding to the target port set.
  • the target port set may be a CSI-RS port set or multiple CSI-RS port sets. If there are multiple CSI-RS port sets, the terminal needs to report the indication information of each target port set and the CSI corresponding to each target port set respectively. This indication information can also be considered as index information of the target port set.
  • the indication information of the target port set is indicated by the index of the port subset.
  • the target port set includes port subset 0 and port subset 1, then the target port set is indicated by ⁇ 0,1 ⁇ ; in some cases
  • the indication information of the target port set is indicated by a bitmap. For example, if there are 9 CSI-RS port combinations, the bitmap includes 9 bits. When the i-th bit is the first value, it is used for indication. The i-th CSI-RS port combination is the target port set; when the i-th bit is the second value, it is used to indicate that the i-th CSI-RS port combination is not the target port set, and i is an integer not greater than 9. For example, "001000000" represents activating the third CSI-RS port combination which is the target port set.
  • different CSI-RS port sets among the multiple CSI-RS port sets correspond to different CJT transmission assumptions.
  • the first type of CSI-RS port set is a CSI-RS port set including multiple (at least two) port subsets
  • the first type of CSI-RS port set is a port based on the CJT transmission hypothesis.
  • the second type of CSI-RS port set is a CSI-RS port set including a port subset, and the second type of CSI-RS port set is a single TPR
  • the port set of the transmission hypothesis that is, the assumption that a TRP independently performs downlink transmission
  • the third type of CSI-RS port set is a CSI-RS port set that includes two port subsets.
  • the third type of CSI-RS port set is The set of ports assumed for CJT transmission between two TPRs is suitable for scenarios where the terminal's downlink capability is limited and supports up to two TRPs for CJT.
  • the target CSI-RS port set includes at least one of the following:
  • the above-mentioned CSI includes PMI, and the PMI is obtained based on the codebook of m ports or the codebook of n ports; where m is the number of ports in the target CSI-RS port set.
  • the CSI includes K pieces of PMI information, each PMI information corresponding to a port subset; where K is the number of port subsets in the target CSI-RS port set.
  • the different port combinations within one CSI-RS resource are configured by the network device; or, a The different port combinations within the CSI-RS resource are all possible combinations of the port subsets included in the CSI-RS resource.
  • the different CSI-RS resources within one CSI-RS resource set include CSI-RS
  • the number of ports is not exactly the same; or, at least two CSI-RS resources in a CSI-RS resource set include different numbers of CSI-RS ports.
  • different CSI-RS resources within one CSI-RS resource set use the same P_offset
  • P_offset is the power difference between the CSI-RS port and PDSCH in the CSI-RS resource.
  • the indication information is the indication information of the port combination; when the multiple CSI-RS port sets are one CSI-RS resource, the indication information is the indication information of the port combination; In the case of different CSI-RS resources in the RS resource set, the indication information is CSI-RS resource indication information.
  • the CSI includes at least two PMI information, and the relative amplitude and/or relative phase between the at least two PMI information; wherein the at least two PMI information corresponds to different ports in the target CSI-RS port set.
  • the CSI includes the first PMI and the second PMI, as well as the relative amplitude and/or relative phase between the first PMI and the second PMI; where the first PMI and the second PMI correspond to the target CSI-RS port set.
  • the first PMI and the second PMI generally refer to any two different CSI-RS ports in the target CSI-RS port set.
  • the CSI includes at least three PMI information, wherein at least one PMI information corresponds to all CSI-RS ports in the target CSI-RS port set, and at least the other two PMI information corresponds to different ones in the CSI-RS port set.
  • CSI-RS port For example, the CSI includes a third PMI, a fourth PMI and a fifth PMI, the third PMI corresponds to all CSI-RS ports in the target port set, and the fourth PMI and the fifth PMI correspond to different CSI-RS ports in the target port set.
  • the terminal receives the same PDSCH on the antenna ports corresponding to the target port combination.
  • the same PDSCH is transmitted by the network equipment using different precoding matrices on multiple TRPs, that is, CJT.
  • the method provided in this embodiment is to use the terminal to measure different CSI-RS port combinations or CSI-RS resources containing different port subsets to measure the CSI corresponding to different CJT transmission assumptions, thereby reporting the target recommended by the terminal.
  • CSI of the port set for example, assuming that the target port set corresponds to the CJT transmission with the best measurement quality, the network device can select the current best CJT transmission solution to improve the performance of downlink transmission.
  • Figure 3 shows a flow chart of a CSI receiving method provided by an exemplary embodiment of the present application.
  • the method is exemplified by being performed by a network device.
  • the method includes:
  • Step 302 Configure multiple CSI-RS port sets.
  • the multiple CSI-RS port sets are different CSI-RS port combinations within one CSI-RS resource or different CSI-RS resources within one CSI-RS resource set;
  • each CSI-RS port set is a CSI-RS port combination within a CSI-RS resource, and different CSI-RS port sets are different CSI-RS port combinations; or, each CSI-RS port set is A CSI-RS port on one CSI-RS resource within a CSI-RS resource set, and different CSI-RS port sets are CSI-RS ports on different CSI-RS resources.
  • Each CSI-RS port set in the multiple CSI-RS port sets includes: at least one port subset, and each port subset in the at least one port subset includes n consecutive CSI-RS ports; where n is greater than an integer of 1.
  • Each port subset corresponds to a TRP.
  • a CSI-RS port set includes only one port subset, it corresponds to a single TRP transmission scenario; when a CSI-RS port set includes two port subsets, it corresponds to a CJT transmission scenario with 2 TRPs; When a CSI-RS port set includes multiple port subsets, it corresponds to the scenario of multiple TRPs performing CJT transmission.
  • the port subset ⁇ 0,1,2,3 ⁇ is the CSI-RS port transmitted by TRP0
  • the port subset ⁇ 4,5,6,7 ⁇ is the CSI-RS port transmitted by TRP1
  • the port subset ⁇ 8,9,10,11 ⁇ is the CSI-RS port transmitted by TRP2
  • the port subset ⁇ 12,13,14,15 ⁇ is the CSI-RS port transmitted by TRP3, then:
  • CSI-RS port combination 1 includes ⁇ 0,1,2,3 ⁇ , corresponding to the independent transmission assumption of TRP0;
  • CSI-RS port combination 2 includes ⁇ 4,5,6,7 ⁇ , corresponding to the independent transmission assumption of TRP1;
  • CSI-RS port combination 3 includes ⁇ 8,9,10,11 ⁇ , corresponding to the independent transmission assumption of TRP2;
  • CSI-RS port combination 4 includes ⁇ 12, 13, 14, 15 ⁇ , corresponding to the independent transmission assumption of TRP3;
  • CSI-RS port combination 5 includes ⁇ 0,1,2,3,4,5,6,7 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP1;
  • CSI-RS port combination 6 includes ⁇ 0,1,2,3,8,9,10,11 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP2;
  • CSI-RS port combination 7 includes ⁇ 0,1,2,3,12,13,14,15 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP3;
  • CSI-RS port combination 8 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11 ⁇ , corresponding to the transmission assumption of CJT between TRP0, TRP1 and TRP2;
  • CSI-RS port combination 9 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ⁇ , corresponding to TRP0, TRP1, TRP2 and TRP3
  • CSI-RS resource 1 includes ⁇ 0,1,2,3 ⁇ , corresponding to the independent transmission assumption of TRP0;
  • CSI-RS resource 2 includes ⁇ 4,5,6,7 ⁇ , corresponding to the independent transmission assumption of TRP1;
  • CSI-RS resource 3 includes ⁇ 8,9,10,11 ⁇ , corresponding to the independent transmission assumption of TRP2;
  • CSI-RS resource 4 includes ⁇ 12, 13, 14, 15 ⁇ , corresponding to the independent transmission assumption of TRP3;
  • CSI-RS resource 5 includes ⁇ 0,1,2,3,4,5,6,7 ⁇ , corresponding to the transmission assumption of CJT between TRP0 and TRP1;
  • CSI-RS resource 6 includes ⁇ 0,1,2,3,8,9,10,11 ⁇ , corresponding to the CJT transmission hypothesis between TRP0 and TRP2;
  • CSI-RS resource 7 includes ⁇ 0,1,2,3,12,13,14,15 ⁇ , corresponding to the CJT transmission hypothesis between TRP0 and TRP3;
  • CSI-RS resource 8 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11 ⁇ , corresponding to the transmission hypothesis of CJT between TRP0, TRP1 and TRP2;
  • CSI-RS resource 9 includes ⁇ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ⁇ , corresponding to TRP0, TRP1, TRP2 and TRP3 Make transmission assumptions for CJT.
  • the port number range of the CSI-RS port is [3000, 4000].
  • the port number "0-15" in the above example is used to represent the i-th CSI-RS port.
  • the actual port number of the i-th CSI-RS port is one of [3000, 4000].
  • the actual port number of different CSI-RS ports The port numbers are different, and the actual port numbers of different CSI-RS ports are continuous or discontinuous. This article only uses the port numbers "0-15" for illustrative purposes, and does not represent the actual port numbers of the CSI-RS ports.
  • the number of port subsets in different CSI-RS port sets is not exactly the same; or, there are at least two CSI-RS port sets with different numbers of port subsets; or, there are at least two CSI-RS
  • the CJT transmission assumptions corresponding to the port sets are different.
  • the CJT transmission assumption is based on the assumption that at least two TRPs are transmitted.
  • different CSI-RS port sets include the same port subset; or different CSI-RS port sets include port subsets that occupy the same resources; or, in the CJT transmission hypothesis corresponding to different CSI-RS port sets The same TRP exists.
  • each port subset is configured with an independent P_offset; where P_offset is the power difference between the CSI-RS port and the PDSCH in the port subset.
  • the P_offset is configured by the network device to the terminal.
  • each port subset is configured with an independent Transceiver Configuration Indicator (TCI) status.
  • TCI status is configured by the network device to the terminal.
  • the terminal performs measurements on CSI-RS port combinations configured by the network device; in some embodiments, the terminal performs measurements on all possible CSI-RS port combinations.
  • the terminal When different CSI-RS port combinations within one CSI-RS resource are configured by the network device, the terminal receives configuration signaling from the network device, and the configuration signaling carries configuration information of different CSI-RS port combinations.
  • the network device configures different CSI-RS port combinations within a CSI-RS resource to the terminal.
  • different CSI-RS port combinations are configured using the index of the port subset.
  • the index of port subset 0-1 is expressed as 0,1,2,3.
  • the above CSI-RS port combination 1 is expressed as a set of index combinations of port subsets ⁇ 0 ⁇
  • the above CSI-RS port combination 6 is expressed as a set of index combinations ⁇ 0 ⁇ .
  • Index combination ⁇ 0, 2 ⁇ for the group port subset.
  • an index combination of a set of port subsets to represent all possible combinations of the indexes of these port subsets, such as a set of index combinations of port subsets ⁇ 0, 1, 2 ⁇ represents: 0, 1 , 2, 0+1, 0+2, 1+2, 0+1+2, a total of 7 combinations.
  • CSI-RS port combinations are indicated using a bitmap, and each bit in the bitmap is used to indicate a CSI-RS port combination. For example, there are 9 CSI-RS port combinations, then The bitmap includes 9 bits. When the i-th bit is the first value, it is used to activate or indicate that the i-th CSI-RS port combination is the port combination that needs to be measured; when the i-th bit is the second value, Used to deactivate or not indicate that the i-th CSI-RS port combination is the port combination that needs to be measured, i is an integer not greater than 9. For example, "111000000” represents activating the first three CSI-RS port combinations, and "111100001" represents activating the first four CSI-RS port combinations and the last CSI-RS port combination.
  • Step 304 Receive indication information of a target port set among multiple CSI-RS port sets and CSI corresponding to the target port set.
  • the target port set may be a CSI-RS port set or multiple CSI-RS port sets. If there are multiple CSI-RS port sets, the terminal needs to report the indication information of each target port set and the CSI corresponding to each target port set respectively. This indication information can also be considered as index information of the target port set.
  • the indication information of the target port set is indicated by the index of the port subset.
  • the target port set includes port subset 0 and port subset 1, then the target port set is indicated by ⁇ 0,1 ⁇ ; in some cases
  • the indication information of the target port set is indicated by a bitmap. For example, if there are 9 CSI-RS port combinations, the bitmap includes 9 bits. When the i-th bit is the first value, it is used for indication. The i-th CSI-RS port combination is the target port set; when the i-th bit is the second value, it is used to indicate that the i-th CSI-RS port combination is not the target port set, and i is an integer not greater than 9. For example, "001000000" represents activating the third CSI-RS port combination which is the target port set.
  • different CSI-RS port sets among the multiple CSI-RS port sets correspond to different CJT transmission assumptions.
  • the first type of CSI-RS port set is a CSI-RS port set including multiple (at least two) port subsets
  • the first type of CSI-RS port set is a port based on the CJT transmission hypothesis.
  • a set that is, it is assumed that at least two TRPs perform CJT transmission;
  • the second type of CSI-RS port set is a CSI-RS port set including a port subset, and the second type of CSI-RS port set is a single TPR
  • the port set of the transmission hypothesis that is, the assumption that a TRP independently performs downlink transmission;
  • the third type of CSI-RS port set is a CSI-RS port set that includes two port subsets.
  • the third type of CSI-RS port set is The set of ports assumed for CJT transmission between two TPRs is suitable for scenarios where the terminal's downlink capability is limited and supports up to two TRPs for CJT.
  • the target CSI-RS port set includes at least one of the following:
  • the CSI-RS port set recommended by the terminal is: the CSI-RS port set with the best measurement quality measured on the terminal side.
  • the above-mentioned CSI includes PMI, and the PMI is obtained based on the codebook of m ports or the codebook of n ports; where m is the number of ports in the target CSI-RS port set.
  • the CSI includes K pieces of PMI information, each PMI information corresponding to a port subset; where K is the number of port subsets in the target CSI-RS port set.
  • the different port combinations within one CSI-RS resource are configured by the network device; or, a The different port combinations within the CSI-RS resource are all possible combinations of the port subsets included in the CSI-RS resource.
  • the different CSI-RS resources within one CSI-RS resource set include CSI-RS
  • the number of ports is not exactly the same; or, at least two CSI-RS resources in a CSI-RS resource set include different numbers of CSI-RS ports.
  • different CSI-RS resources within a CSI-RS resource set use the same transmit power.
  • the indication information is the indication information of the port combination; when the multiple CSI-RS port sets are one CSI-RS resource, the indication information is the indication information of the port combination; In the case of different CSI-RS resources in the RS resource set, the indication information is CSI-RS resource indication information.
  • the CSI includes at least two PMI information, and the relative amplitude and/or relative phase between the at least two PMI information; wherein the at least two PMI information corresponds to different ports in the target CSI-RS port set.
  • the CSI includes the first PMI and the second PMI, as well as the relative amplitude and/or relative phase between the first PMI and the second PMI; where the first PMI and the second PMI correspond to the target CSI-RS port set.
  • the first PMI and the second PMI generally refer to any two different CSI-RS ports in the target CSI-RS port set.
  • the CSI includes at least three PMI information, wherein at least one PMI information corresponds to all CSI-RS ports in the target CSI-RS port set, and at least the other two PMI information corresponds to different ones in the CSI-RS port set.
  • CSI-RS port For example, the CSI includes a third PMI, a fourth PMI and a fifth PMI, the third PMI corresponds to all CSI-RS ports in the target port set, and the fourth PMI and the fifth PMI correspond to different CSI-RS ports in the target port set.
  • the network device transmits the same PDSCH on the ports corresponding to the target port set.
  • Network equipment uses different precoding matrices to transmit the same PDSCH on multiple TRPs, which is coherent joint transmission.
  • the method provided in this embodiment configures CSI-RS resources to the terminal through the network device, and the terminal measures different CSI-RS port combinations or CSI-RS resources containing different port subsets to measure different CJT transmission assumptions.
  • the corresponding CSI is used to report the CSI of the recommended target port set, such as the CJT transmission hypothesis corresponding to the target port set.
  • the network device can select the best current CJT transmission scheme to improve the performance of downlink transmission.
  • Figure 4 shows a flow chart of a CSI reporting method provided by an exemplary embodiment of the present application. This embodiment illustrates that the method is executed by a terminal and a network device. The method includes:
  • Step 402 The network device configures CSI-RS resources to the terminal, where the CSI-RS resources include multiple CSI-RS ports;
  • Step 404 The terminal performs CSI measurements based on different CSI-RS port combinations in the CSI-RS resource.
  • the CSI-RS resources include multiple port subsets, and each CSI-RS port combination in different CSI-RS port combinations includes one or more port subsets.
  • Each port subset includes n consecutive CSI-RS ports, where n is an integer greater than 1.
  • n can be configured by the network device, predefined by the communication protocol, or determined based on the type of terminal.
  • the CSI-RS resources include 16 CSI-RS ports, divided into ⁇ 0,1,2,3 ⁇ , ⁇ 4,5,6,7 ⁇ , ⁇ 8,9,10,11 ⁇ , ⁇ 12, 13, 14, 15 ⁇ four port subsets, different CSI-RS port combinations include different port subsets, and each CSI-RS port combination includes at least one port subset, for example:
  • CSI-RS port combination 1 ⁇ 0,1,2,3 ⁇ ;
  • CSI-RS port combination 2 ⁇ 4,5,6,7 ⁇ ;
  • CSI-RS port combination 3 ⁇ 8,9,10,11 ⁇ ;
  • CSI-RS port combination 4 ⁇ 12,13,14,15 ⁇ ;
  • CSI-RS port combination 5 ⁇ 0,1,2,3,4,5,6,7 ⁇ ;
  • CSI-RS port combination 6 ⁇ 0,1,2,3,8,9,10,11 ⁇ ;
  • CSI-RS port combination 7 ⁇ 0,1,2,3,12,13,14,15 ⁇ ;
  • CSI-RS port combination 8 ⁇ 0,1,2,3,4,5,6,7,8,9,10,11 ⁇ ;
  • CSI-RS port combination 9 ⁇ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ⁇ .
  • Figure 5 shows an exemplary time-frequency map of a port subset. It is assumed that time slot 0 on the abscissa includes symbols 0-7, and time slot 1 includes symbols 8-13; and the ordinate includes subcarriers 0-11 (from down to up).
  • the four CSI-RS ports ⁇ 0,1,2,3 ⁇ of port subset 1 occupy symbols 2-3 in the time domain and subcarriers 1-2 in the frequency domain; the four CSI-RS ports of port subset 2 Ports ⁇ 4,5,6,7 ⁇ occupy symbols 2-3 in the time domain and subcarriers 4-5 in the frequency domain; the four CSI-RS ports ⁇ 8,9,10,11 ⁇ of port subset 3 Occupy symbols 2-3 in the time domain, and occupy subcarriers 7-8 in the frequency domain; the four CSI-RS ports ⁇ 12, 13, 14, 15 ⁇ of port subset 4 occupy symbols 2-3 in the time domain, Subcarriers 10-11 are occupied in the frequency domain.
  • Figure 6 shows an exemplary time-frequency map of a port subset. It is assumed that time slot 0 on the abscissa includes symbols 0-7, and time slot 1 includes symbols 8-13; and the ordinate includes subcarriers 0-11 (from down to up).
  • the four CSI-RS ports ⁇ 0,1,2,3 ⁇ of port subset 1 occupy symbols 2-3 in the time domain and subcarriers 2-3 in the frequency domain; the four CSI-RS ports of port subset 2 Ports ⁇ 4,5,6,7 ⁇ occupy symbols 2-3 in the time domain and subcarriers 7-8 in the frequency domain; the four CSI-RS ports ⁇ 8,9,10,11 ⁇ of port subset 3 Occupy symbols 10-11 in the time domain, and occupy subcarriers 2-3 in the frequency domain; the four CSI-RS ports ⁇ 12, 13, 14, 15 ⁇ of port subset 4 occupy symbols 10-11 in the time domain, Subcarriers 7-8 are occupied in the frequency domain.
  • different port subsets correspond to CSI-RS ports for different TRP transmissions.
  • the four port subsets ⁇ 0,1,2,3 ⁇ 4,5,6,7 ⁇ 8,9,10,11 ⁇ 12,13,14,15 ⁇ are respectively CSI-RS ports corresponding to four different TRP transmissions.
  • some CSI-RS port combinations in a CSI-RS resource only include a subset of ports (such as the port combinations 1-4 above), that is, corresponding to a single TRP transmission.
  • the terminal when the terminal performs CSI measurement based on the CSI-RS port combination, it is only based on the transmission assumption of a single TRP and not based on the CJT transmission assumption.
  • the terminal For a CSI-RS port combination including multiple port subsets, the terminal performs CSI measurements based on the assumption of CJT transmission between these port subsets.
  • the terminal performs CSI measurements based on different port combinations in the CSI-RS resource and performs CJT transmission assumptions respectively, where different CSI-RS port combinations correspond to different CJT transmission assumptions; or, different CSI-RS Port combinations correspond to different TRP transmission combinations.
  • the port subset ⁇ 0,1,2,3 ⁇ is the CSI-RS port transmitted by TRP0
  • the port subset ⁇ 4,5,6,7 ⁇ is the CSI-RS port transmitted by TRP1
  • the port subset ⁇ 8 ,9,10,11 ⁇ are the CSI-RS ports transmitted by TRP2
  • the port subset ⁇ 12,13,14,15 ⁇ are the CSI-RS ports transmitted by TRP3, then:
  • CSI-RS port combination 1 corresponds to the independent transmission of TRP0;
  • CSI-RS port combination 2 corresponds to the independent transmission of TRP1;
  • CSI-RS port combination 3 corresponds to TRP2 independent transmission
  • CSI-RS port combination 4 corresponds to TRP3 independent transmission
  • CSI-RS port combination 5 corresponds to the situation of CJT coherent joint transmission between TRP0 and TRP1;
  • CSI-RS port combination 6 corresponds to the case of CJT coherent joint transmission between TRP0 and TRP2;
  • CSI-RS port combination 7 corresponds to the situation of CJT coherent joint transmission between TRP0 and TRP3;
  • CSI-RS port combination 8 corresponds to the situation of CJT coherent joint transmission between TRP0, TRP1 and TRP2;
  • CSI-RS port combination 9 corresponds to the case of CJT coherent joint transmission between TRP0, TRP1, TRP2 and TRP3.
  • CSI-RS port combination 7 ⁇ 0,1,2,3,12,13,14,15 ⁇ corresponds to the transmission hypothesis of CJT between TRP0 and TRP3.
  • the terminal can measure the corresponding CSI based on this transmission hypothesis and report it.
  • the network device can schedule TRP0 and TRP3 for CJT transmission based on this CSI.
  • the number of port subsets in different CSI-RS port combinations is not exactly the same, or there are at least two CSI-RS port combinations with different numbers of port subsets, or there are at least two CSI-RS
  • the number of TRPs corresponding to port combinations is different.
  • a CSI-RS port combination may include 1, 2, 3 or 4 port subsets, and the number of port subsets included in different CSI-RS port combinations may be the same or different.
  • different CSI-RS port combinations include the same port subset, or there are at least two CSI-RS port combinations having the same port subset. That is to say, the same CSI-RS port or CSI-RS physical resource can be configured in different CSI-RS port combinations at the same time.
  • each port subset is configured with an independent P_offset, where P_offset is the power difference between the CSI-RS port and the PDSCH in the port subset.
  • the P_offset is configured by the network device to the terminal. Since different port subsets come from different TRPs, CSI-RS resources can be configured with multiple P_offsets, and different port subsets can be configured with different P_offsets.
  • the terminal performs CSI measurements on different port subsets, it needs to perform CSI measurements on each port subset based on different P_offsets, such as Channel-Quality Indicator (CQI) measurements.
  • CQI Channel-Quality Indicator
  • each subset of ports is configured with an independent TCI state. That is to say, since different port subsets correspond to different TRPs, CSI-RS resources can be configured with multiple TCI states (each TRP corresponds to one TCI state), and different port subsets can be configured with different TCI states.
  • the terminal needs to use different TCI states to receive corresponding port subsets. That is, when the terminal performs CSI measurement on the i-th port subset, it uses the i-th TCI state to perform CSI measurement on the i-th port subset.
  • the i-th TCI state is the TCI corresponding to the i-th port subset. state.
  • different CSI-RS port combinations within one CSI-RS resource are configured by the network device, for example, the network device is configured in advance to the terminal through high-level signaling.
  • the network device can also configure the corresponding CSI-RS port combination (such as the CSI-RS port combinations 1-9 above).
  • the terminal only needs to configure at least one CSI-RS port combination based on the network device configuration. CSI measurements.
  • the index of the port subset can be used for configuration.
  • each CSI-RS port combination is represented by the index of the port subset.
  • the above CSI-RS port combination 5 can be expressed as ⁇ 0,1 ⁇ .
  • CSI-RS port combinations are indicated using a bitmap, and each bit in the bitmap is used to indicate a CSI-RS port combination. For example, there are 9 CSI-RS port combinations, then The bitmap includes 9 bits. When the i-th bit is the first value, it is used to activate or indicate that the i-th CSI-RS port combination is the port combination that needs to be measured; when the i-th bit is the second value, Used to deactivate or not indicate that the i-th CSI-RS port combination is the port combination that needs to be measured, i is an integer not greater than 9. For example, "111000000” represents activating the first three CSI-RS port combinations, and "111100001" represents activating the first four CSI-RS port combinations and the last CSI-RS port combination.
  • different CSI-RS port combinations within one CSI-RS resource are all possible combinations of port subsets in the CSI-RS resource.
  • the CSI-RS resource includes 12 CSI-RS ports, divided into three port subsets ⁇ 0,1,2,3 ⁇ 4,5,6,7 ⁇ 8,9,10,11 ⁇ , Then different CSI-RS port combinations are all possible combinations of port subsets, a total of 7 types as follows:
  • CSI-RS port combination 1 ⁇ 0,1,2,3 ⁇ ;
  • CSI-RS port combination 2 ⁇ 4,5,6,7 ⁇ ;
  • CSI-RS port combination 3 ⁇ 8,9,10,11 ⁇ ;
  • CSI-RS port combination 4 ⁇ 0,1,2,3,4,5,6,7 ⁇ ;
  • CSI-RS port combination 5 ⁇ 0,1,2,3,8,9,10,11 ⁇ ;
  • CSI-RS port combination 6 ⁇ 4,5,6,7,8,9,10,11 ⁇ ;
  • CSI-RS port combination 7 ⁇ 0,1,2,3,4,5,6,7,8,9,10,11 ⁇ .
  • Step 406 The terminal reports the indication information of the target port combination among the multiple CSI-RS port combinations, and the CSI corresponding to the target port combination.
  • the target port combination can be one CSI-RS port combination or multiple CSI-RS port combinations. If there are multiple CSI-RS port combinations, the terminal needs to report the indication information of each target port combination and the CSI corresponding to each target port combination.
  • the CSI includes PMI, and the PMI is obtained based on the codebook of m ports, or obtained based on the codebook of n ports, where m is the number of ports in the target port combination, and n is the number of ports in a port subset. .
  • the PMI calculation method in the related technology can be used to estimate the PMI information based on the channel measured on the target port combination.
  • the CSI includes K pieces of PMI information, and each PMI information corresponds to a port subset, where K is the number of port subsets included in the target port combination.
  • the terminal can separately estimate the K PMIs corresponding to each port subset based on the channels obtained on each port subset in the target port combination. That is, the terminal estimates the i-th PMI corresponding to the i-th port subset based on the channel measured on the i-th port subset in the target port combination.
  • the terminal receives codebook configuration information of the network device, and the codebook configuration information is used to indicate whether the terminal obtains the PMI in the CSI based on the m-port codebook or the n-port codebook.
  • the endpoint can determine the target port combination in one of the following ways:
  • the target port combination includes the CSI-RS port combination recommended by the terminal in the first type of CSI-RS port combination, and/or the CSI-RS port combination recommended by the terminal in the second type of CSI-RS port combination.
  • the first type of CSI-RS port combination refers to a CSI-RS port combination that includes multiple port subsets, that is, the CSI-RS port combination corresponding to the transmission hypothesis of CJT;
  • the second type of CSI-RS port combination refers to A CSI-RS port combination that only includes a subset of ports, that is, a CSI-RS port combination that corresponds to a single TRP transmission.
  • the target port combination includes the CSI-RS port combination recommended by the terminal in the first type of CSI-RS port combination (called port combination 1). For example, the terminal reports the best CSI-RS port combination among the first type of CSI-RS port combinations, and does not need to measure and report the second type of CSI-RS port combination. That is, the terminal only needs to report CSI based on the CJT transmission hypothesis. .
  • the target port combination includes the CSI-RS port combination recommended by the terminal in the second type of CSI-RS port combination (called port combination 2).
  • the terminal reports the best CSI-RS port combination among the second type of CSI-RS port combinations and does not need to measure and report the first type of CSI-RS port combination. That is, the terminal only needs to perform CSI based on the transmission assumption of a single TRP. Report.
  • the target port combination includes both the first type of CSI-RS port combination and the second type of CSI-RS port combination.
  • the terminal needs to report the best CSI-RS port combination 1 and the CSI corresponding to port combination 1 in the first type of CSI-RS port combination, and also needs to report the best CSI in the second type CSI-RS port combination.
  • the network device can flexibly choose to use a single TRP transmission method or a multiple TRP joint transmission method based on the content reported by the terminal.
  • Which of the above three methods is used can be configured by the network device to the terminal, or can be implemented independently by the terminal.
  • the network device is configured through high-level signaling.
  • the target port combination includes the CSI-RS port combination recommended by the terminal in the third type of CSI-RS port combination, and/or, the CSI-RS port combination recommended by the terminal in the second type of CSI-RS port combination among multiple port combinations.
  • RS port combination The third type of CSI-RS port combination refers to a CSI-RS port combination including two port subsets, that is, a CSI-RS port combination corresponding to two TRPs for CJT transmission. Examples include the following three solutions:
  • the target port combination includes the CSI-RS port combination recommended by the terminal in the third type of CSI-RS port combination (called port combination 3).
  • the terminal reports the best CSI-RS port combination among the third type of CSI-RS port combination, and does not need to measure and report CSI-RS port combinations that only include one port subset or include more than two port subsets, that is, The terminal only needs to report CSI based on the CJT transmission assumption of two TRPs.
  • the target port combination includes the CSI-RS port combination recommended by the terminal in the second type of CSI-RS port combination (called port combination 4).
  • the terminal reports the best CSI-RS port combination among the second type of CSI-RS port combinations and does not need to measure and report the third type of CSI-RS port combination. That is, the terminal only needs to perform CSI based on the transmission assumption of a single TRP. Report. It is the same as method 1-2.
  • the target port combination includes both port combination 3 and port combination 2.
  • the terminal needs to report not only the best CSI-RS port combination 3 of the third type of CSI-RS port combination and the CSI corresponding to port combination 3, but also the best CSI-RS port combination of the second type.
  • CSI-RS port combination 2 and the CSI corresponding to port combination 2 but there is no need to measure CSI-RS port combinations that include more than two port subsets.
  • the network device can flexibly choose whether to use a single TRP transmission method or a joint transmission method of two TRPs based on the content reported by the terminal.
  • Which of the above three methods is used can be configured by the network device, or implemented independently by the terminal.
  • the terminal selects one of the above three methods based on its own terminal type and/or capability information, or the network device uses high-level information to command configuration.
  • the target port combination is the CSI-RS port combination recommended by the terminal among multiple port combinations.
  • the terminal needs to measure each port combination among multiple port combinations, so as to find the port combination with the best measurement quality and report it.
  • the target port combination may include one port subset, may include two port subsets, or may include more than two port subsets.
  • the terminal will report the optimal transmission hypothesis obtained from the current measurement and the corresponding CSI .
  • the CSI-RS port set recommended by the terminal may be the CSI-RS port set with the best measurement quality measured on the terminal side, such as the measured CQI or the CSI-RS port set with the highest spectrum efficiency.
  • CSI includes RI, PMI, CQI and other information.
  • the CSI includes at least two pieces of PMI information, and the relative amplitude and/or relative phase between the at least two pieces of PMI information; wherein the at least two pieces of PMI information correspond to different ports in the target port combination.
  • Each PMI information can correspond to one of the port subsets.
  • the CSI includes the first PMI and the second PMI, and the relative amplitude and/or relative phase between the first PMI and the second PMI, where the first PMI and the second PMI correspond to different port sub-ports in the target port combination. set.
  • the target port combination includes two port subsets, where the first PMI and the second PMI are obtained by CSI measurements based on the two port subsets respectively; for example, the CSI includes the first PMI, the second PMI, the third PMI and The fourth PMI, the target port combination includes four port subsets, and the four PMIs are obtained by performing CSI measurements based on different port subsets in the four port subsets.
  • the relative amplitude and/or relative phase between at least two pieces of PMI information may be quantified information of the relative amplitude and/or relative phase.
  • the CSI includes at least three PMI information, wherein at least one PMI information corresponds to all CSI-RS ports in the target port combination, and at least the other two PMI information corresponds to different CSI-RS ports in the target port combination.
  • the CSI includes the fifth PMI, the sixth PMI and the seventh PMI.
  • the fifth PMI corresponds to all CSI-RS ports in the target port combination
  • the sixth PMI and seventh PMI correspond to different port subsets in the target port combination. .
  • the CSI-RS port combination includes two port subsets, in which the fifth PMI is obtained based on the joint CSI measurement of these two port subsets; the sixth PMI and the seventh PMI are obtained based on the CSI measurements of these two port subsets. .
  • Step 408 The network device transmits the same PDSCH on the antenna port corresponding to the target port combination.
  • the network device uses corresponding antenna ports on different TRPs to transmit the same PDSCH, and uses independent precoding matrices when transmitting on different antenna ports.
  • the precoding matrix is obtained according to the PMI reported by the terminal.
  • Network equipment uses different precoding matrices to transmit the same PDSCH on multiple TRPs, which is coherent joint transmission.
  • the network device can configure different CSI-RS ports for different TRPs, and allow the terminal to measure different CSI-RS port combinations to measure the CSI corresponding to different CJT transmission assumptions, thereby reporting Among them, the best CJT transmission hypothesis and corresponding CSI improve the performance of downlink transmission.
  • each TRP corresponds to a port combination, only one CSI-RS resource needs to be configured, and the cost of CSI-RS resources can also be reduced. overhead.
  • Figure 5 shows a flow chart of a CSI reporting method provided by an exemplary embodiment of the present application. This embodiment illustrates that the method is executed by a terminal and a network device. The method includes:
  • Step 502 The network device configures a CSI-RS resource set including multiple CSI-RS resources.
  • Step 504 The terminal performs CSI measurements based on CSI-RS ports on different CSI-RS resources in the CSI-RS resource set.
  • the CSI-RS port on each of the multiple CSI-RS resources includes at least one port subset, such as several port subsets, and each port subset corresponds to a TRP.
  • Each port subset includes n consecutive CSI-RS ports, where n is an integer greater than 1.
  • n can be configured by the network device, or predefined by the protocol, or determined based on the terminal type or terminal capabilities. For example, assume that a port subset includes 4 CSI-RS ports, and the CSI-RS resource set includes 8 CSI-RS resources, which are four 4-port CSI-RS resources (including 1 port subset, denoted as CSI -RS resources 1-4), two 8-port CSI-RS resources (including 2 port subsets, recorded as CSI-RS resources 5-6), one 12-port CSI-RS resource (including 3 ports A subset, denoted as CSI-RS resource 7) and a 16-port CSI-RS resource (including a 4-port subset, denoted as CSI-RS resource 8).
  • CSI-RS resource set includes 8 CSI-RS resources, which are four 4-port CSI-RS resources (including 1 port subset, denoted as CSI -RS resources 1-4), two 8-port
  • CSI-RS resource 1 ⁇ 0,1,2,3 ⁇ , as shown in Figure 8;
  • CSI-RS resource 2 ⁇ 4,5,6,7 ⁇ , as shown in Figure 9;
  • CSI-RS resource 3 ⁇ 8,9,10,11 ⁇ , as shown in Figure 10;
  • CSI-RS resource 4 ⁇ 12,13,14,15 ⁇ , as shown in Figure 11;
  • CSI-RS resource 5 ⁇ 0,1,2,3,4,5,6,7 ⁇ , an example is shown in Figure 12;
  • CSI-RS resource 6 ⁇ 0,1,2,3,8,9,10,11 ⁇ , as shown in Figure 13;
  • CSI-RS resource 7 ⁇ 0,1,2,3,4,5,6,7,8,9,10,11 ⁇ , as shown in Figure 14;
  • CSI-RS resource 8 ⁇ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ⁇ , an example is shown in Figure 15.
  • Figure 5 shows an exemplary time-frequency map of a port subset. It is assumed that time slot 0 on the abscissa includes symbols 0-7, and time slot 1 includes symbols 8-13; the ordinate includes subcarriers 0-11 (from down to up).
  • the four CSI-RS ports ⁇ 0,1,2,3 ⁇ of port subset 1 occupy symbols 2-3 in the time domain and subcarriers 1-2 in the frequency domain; the four CSI-RS ports of port subset 2 Ports ⁇ 4,5,6,7 ⁇ occupy symbols 2-3 in the time domain and subcarriers 4-5 in the frequency domain; the four CSI-RS ports ⁇ 8,9,10,11 ⁇ of port subset 3 Occupy symbols 2-3 in the time domain, and occupy subcarriers 7-8 in the frequency domain; the four CSI-RS ports ⁇ 12, 13, 14, 15 ⁇ of port subset 4 occupy symbols 2-3 in the time domain, Subcarriers 10-11 are occupied in the frequency domain.
  • Figure 6 shows an exemplary time-frequency map of a port subset. It is assumed that time slot 0 on the abscissa includes symbols 0-7, and time slot 1 includes symbols 8-13; and the ordinate includes subcarriers 0-11 (from down to up).
  • the four CSI-RS ports ⁇ 0,1,2,3 ⁇ of port subset 1 occupy symbols 2-3 in the time domain and subcarriers 2-3 in the frequency domain; the four CSI-RS ports of port subset 2 Ports ⁇ 4,5,6,7 ⁇ occupy symbols 2-3 in the time domain and subcarriers 7-8 in the frequency domain; the four CSI-RS ports ⁇ 8,9,10,11 ⁇ of port subset 3 Occupy symbols 10-11 in the time domain, and occupy subcarriers 2-3 in the frequency domain; the four CSI-RS ports ⁇ 12, 13, 14, 15 ⁇ of port subset 4 occupy symbols 10-11 in the time domain, Subcarriers 7-8 are occupied in the frequency domain.
  • different port subsets correspond to CSI-RS ports for different TRP transmissions.
  • the port subset ⁇ 0,1,2,3 ⁇ is the CSI-RS port transmitted by TRP0
  • the port subset ⁇ 4,5,6,7 ⁇ is the CSI-RS port transmitted by TRP1
  • the port subset ⁇ 8 ,9,10,11 ⁇ are the CSI-RS ports transmitted by TRP2
  • the port subset ⁇ 12,13,14,15 ⁇ are the CSI-RS ports transmitted by TRP3, then:
  • CSI-RS resource 1 corresponds to the independent transmission of TRP0;
  • CSI-RS resource 2 corresponds to the independent transmission of TRP1;
  • CSI-RS resource 3 corresponds to the case of TRP2 independent transmission
  • CSI-RS resource 4 corresponds to TRP3 independent transmission
  • CSI-RS resource 5 corresponds to the situation of CJT coherent joint transmission between TRP0 and TRP1;
  • CSI-RS resource 6 corresponds to the situation of CJT coherent joint transmission between TRP0 and TRP2;
  • CSI-RS resource 7 corresponds to the situation of CJT coherent joint transmission between TRP0, TRP1 and TRP2;
  • CSI-RS resource 8 corresponds to the case of CJT coherent joint transmission between TRP0, TRP1, TRP2 and TRP3.
  • the CSI-RS ports on some CSI-RS resources only include a subset of ports, such as CSI-RS resources 1-4, which correspond to a single TRP transmission.
  • CSI-RS resources 1-4 which correspond to a single TRP transmission.
  • the terminal when the terminal performs CSI measurement based on the CSI-RS resource, it only assumes the transmission of a single TRP and does not assume the transmission association of the CJT.
  • the terminal For CSI-RS resources that include multiple port subsets, the terminal performs CSI measurements based on the assumption of CJT transmission between these port subsets.
  • the terminal performs CSI measurements based on the transmission assumption that ports on different CSI-RS resources in the CSI-RS resource set respectively perform coherent joint transmission (CJT), where different CSI-RS resources correspond to different CJT transmissions. Assumption. In another implementation manner, different CSI-RS resources correspond to different TRP transmission combinations.
  • CJT coherent joint transmission
  • CSI-RS resource 5 corresponds to the transmission hypothesis of CJT between TRP0 and TRP1.
  • the terminal can measure the corresponding CSI based on this transmission hypothesis and report it. If the network device needs or expects to schedule TRP0 and TRP1 for CJT transmission, it can based on This CSI is scheduled.
  • different CSI-RS resources include different numbers of port subsets.
  • a CSI-RS resource may include 1, 2, 3 or 4 port subsets, and the numbers included in different CSI-RS resources may be the same or different.
  • different CSI-RS resources include subsets of ports occupying the same resources.
  • the same resources include port resources, time-frequency resources, sequence resources, beam resources, etc. That is to say, the same CSI-RS port or physical resource can be multiplexed in different CSI-RS resources at the same time.
  • the same resources here include the same time-frequency physical resources, and may further include the same sequence resources, and may also include using the same beam, that is, being sent by the same TRP.
  • CSI-RS resources 1-4 each include a port subset, and the resources of these four port subsets are different.
  • CSI-RS resource 5 includes two port subsets, one of which has the same port subset as the CSI-RS resource 1, and the other has the same port subset as the CSI-RS resource 2.
  • CSI-RS resource 6 includes two port subsets, one port subset has the same resources as CSI-RS resource 1, and the other port subset has the same resources as CSI-RS resource 3.
  • CSI-RS resource 7 includes three port subsets, and the resources of these three port subsets are the same as CSI-RS resources 1-3 respectively.
  • CSI-RS resource 8 includes four port subsets, and the resources of these four port subsets are the same as CSI-RS resources 1-4 respectively.
  • port subsets and TRPs have a one-to-one correspondence, if two CSI-RS resources include CSI-RS ports from the same TRP, at least some of the ports from the same TRP on the two CSI-RS resources can be reused. The same resources, thereby reducing the physical resources occupied by CSI-RS.
  • the terminal device may assume that different CSI-RS resources in a CSI-RS resource set use the same P_offset, where P_offset is the power difference between the CSI-RS port and the PDSCH in the CSI-RS resource. Since different CSI-RS resources may include CSI-RS ports from the same TRP, these CSI-RS ports can only use the same transmit power. At this time, if the transmit power is determined separately for each CSI-RS resource, different CSI -RS resources need to use the same P_offset.
  • the network device configures an independent TCI state for each port subset in the CSI-RS resources. That is to say, since different port subsets come from different TRPs, each CSI-RS resource can be configured with multiple TCI states (each TRP corresponds to one TCI state), and different port subsets can be configured with different TCI states.
  • the terminal When receiving different CSI-RS resources, it is necessary to use respective TCI states to receive corresponding port subsets.
  • different CSI-RS resources within a CSI-RS resource set do not include exactly the same number of CSI-RS ports. That is to say, the number of ports of the two CSI-RS resources in the CSI-RS resource set may be the same or different, but the ports of all CSI-RS resources will not be the same.
  • different CSI-RS resources in a CSI-RS resource set include different numbers of CSI-RS ports.
  • a CSI-RS resource set includes three CSI-RS resources. These three CSI-RS resources include 4, 8, and 16 CSI-RS ports respectively.
  • Step 506 The terminal reports indication information of target CSI-RS resources in different port combinations and CSI corresponding to the target CSI-RS resources.
  • the indication information is CSI-RS resource indication information (CRI).
  • CRI CSI-RS resource indication information
  • the target CSI-RS resource may be one CSI-RS resource or multiple CSI-RS resources. If there are multiple resources, the terminal needs to report the CRI and corresponding CSI corresponding to each target CSI-RS resource.
  • the CSI includes PMI, and the PMI is obtained based on the codebook of N ports, or the codebook of n ports, where m is the number of ports included in the target CSI-RS resource, and n is the number of ports included in the aforementioned port subset. number of ports.
  • the PMI calculation method of related technologies can be used to estimate the PMI information based on the channel obtained on the target CSI-RS resource.
  • the CSI When the PMI is obtained based on the n-port codebook, the CSI includes K pieces of PMI information, each PMI information corresponds to a port subset, and K is the number of port subsets in the target CSI-RS resource.
  • the terminal can separately estimate the K PMIs corresponding to each port subset based on the channels obtained on each port subset in the target CSI-RS resource.
  • the terminal receives configuration information of the network device, and the configuration information is used to indicate whether the terminal obtains the PMI in the CSI based on the m-port codebook or the n-port codebook.
  • the first type of CSI-RS resource is a CSI-RS resource that includes multiple (at least two) port subsets, for example, a CSI-RS resource with a number of CSI-RS ports greater than n.
  • the first type of CSI-RS resources are all port sets based on the CJT transmission assumption, that is, at least two TRPs perform the CJT transmission assumption;
  • the second type of CSI-RS resources are CSI-RS resources that include a subset of ports. , for example, the number of CSI-RS ports is equal to n CSI-RS resources.
  • the second type of CSI-RS resources are all port sets based on the transmission assumption of a single TPR, that is, the assumption that one TRP independently performs downlink transmission;
  • the third type of CSI-RS resources are CSI-RS resources that include two port subsets. , for example, the number of CSI-RS ports is equal to 2n CSI-RS resources.
  • the third type of CSI-RS resources are all port sets assuming that two TRPs perform CJT transmission. They are suitable for scenarios where the terminal's downlink capability is limited and support up to two TRPs for CJT.
  • the terminal may determine the target CSI-RS resource in one of the following ways:
  • the target CSI-RS resources include CSI-RS resources recommended by the terminal in the first type of CSI-RS resources, and/or CSI-RS resources recommended by the terminal in the second type of CSI-RS resources. Examples include the following three solutions:
  • the target CSI-RS resource includes the CSI-RS resource recommended by the terminal among the first type of CSI-RS resource (called the first CSI-RS resource). For example, the terminal reports the best CSI-RS resources including the first type of CSI-RS resources, and does not need to measure and report the second type of CSI-RS resources. That is, the terminal only needs to report CSI based on the CJT transmission hypothesis.
  • the target CSI-RS resources include CSI-RS resources recommended by the terminal among the second type of CSI-RS resources (called second CSI-RS resources). For example, the terminal reports the best CSI-RS resources including the second type of CSI-RS resources, and does not need to measure and report the CSI-RS resources including the first type. That is, the terminal only needs to report CSI based on the transmission assumption of a single TRP. .
  • the target CSI-RS resource includes both the first CSI-RS resource and the second CSI-RS resource.
  • the terminal needs to report the best CSI-RS resources and the corresponding measured CSI among the first type of CSI-RS resources, and also needs to report the best CSI-RS resources and the corresponding measured CSI among the second type of CSI-RS resources. The corresponding measured CSI.
  • the network device can flexibly choose whether to use a single TRP transmission method or a multiple TRP joint transmission method based on the content reported by the terminal.
  • Which of the above three methods is used can be determined by network device configuration, for example, through high-level signaling configuration.
  • the target CSI-RS resources include CSI-RS resources recommended by the terminal among the third type of CSI-RS resources among the plurality of CSI-RS resources, and/or the plurality of CSI-RS resources include the second type of CSI.
  • -RS resources CSI-RS resources recommended by the terminal. Examples include the following three solutions:
  • the target CSI-RS resource includes the CSI-RS resource recommended by the terminal among the third type of CSI-RS resource among the plurality of CSI-RS resources (called the third CSI-RS resource).
  • the terminal reports the best CSI-RS resource among the third type of CSI-RS resources, and does not need to measure and report the second type or CSI-RS resources including more than two port subsets (for example, the number of ports is greater than 2n CSI-RS resources), that is, the terminal only needs to perform CSI reporting based on the transmission assumption of CJT based on two TRPs.
  • the target CSI-RS resource includes the CSI-RS resource recommended by the terminal among the second type of CSI-RS resource among the plurality of CSI-RS resources (called the fourth CSI-RS resource).
  • the terminal reports the best CSI-RS resources including the second type of CSI-RS resources, and does not need to measure and report the third type of CSI-RS resources. That is, the terminal only needs to report CSI based on the transmission assumption of a single TRP.
  • the target CSI-RS resource includes both the third CSI-RS resource and the fourth CSI-RS resource.
  • the terminal needs to report not only the best CSI-RS resources and corresponding measured CSI among the third type of CSI-RS resources, but also the terminal's CSI-RS resources and corresponding measured CSI among the second type of CSI-RS resources. Measured CSI, but need not measure CSI-RS resources that include more than two port subsets. In this way, the network device can flexibly choose whether to use a single TRP transmission method or a joint transmission method of two TRPs based on the content reported by the terminal.
  • Which of the above three methods is used can be determined by network device configuration, for example, through high-level signaling configuration.
  • the target CSI-RS resource is the CSI-RS resource recommended by the terminal among multiple CSI-RS resources.
  • the terminal needs to measure each CSI-RS resource among multiple CSI-RS resources, so as to find the CSI-RS resource with the best measurement quality and report it.
  • the target CSI-RS resource may include the second type, the third type, or more than two port subsets, and the terminal will report the CSI corresponding to the optimal transmission hypothesis currently measured.
  • CSI includes RI, PMI, CQI and other information.
  • the CSI includes at least two pieces of PMI information, and the relative amplitude and/or relative phase between the at least two pieces of PMI information; wherein the at least two pieces of PMI information correspond to different ports in the target CSI-RS resource.
  • Each PMI information can correspond to one of the port subsets.
  • the CSI includes a first PMI and a second PMI, as well as a relative amplitude and/or a relative phase between the first PMI and the second PMI, where the first PMI and the second PMI correspond to different values in the target CSI-RS resource. Port subset.
  • the target CSI-RS resource includes two port subsets, where the first PMI and the second PMI are obtained by performing CSI measurements based on the two port subsets respectively; for example, the CSI includes the first PMI, the second PMI, the third PMI and the fourth PMI, the target CSI-RS resource includes four port subsets, and the four PMIs are obtained by performing CSI measurements based on different port subsets in the four port subsets.
  • the relative amplitude and/or relative phase between at least two pieces of PMI information may be quantified information of the relative amplitude and/or relative phase.
  • the CSI includes at least three PMI information, wherein at least one PMI information corresponds to all CSI-RS ports in the target CSI-RS resource, and at least the other two PMI information corresponds to different CSI-RS ports in the target CSI-RS resource.
  • CSI-RS port For example, the CSI includes the fifth PMI, the sixth PMI, and the seventh PMI. The fifth PMI corresponds to all CSI-RS ports in the target CSI-RS resource, and the sixth PMI and the seventh PMI correspond to different ports in the target CSI-RS resource. A subset of ports.
  • the CSI-RS resource includes two port subsets, in which the fifth PMI is obtained based on the joint CSI measurement of these two port subsets; the sixth PMI and the seventh PMI are obtained based on the CSI measurements of the two port subsets respectively.
  • Step 508 The network device transmits the same PDSCH on the antenna port corresponding to the target CSI-RS resource.
  • Network equipment uses different precoding matrices to transmit the same PDSCH on multiple TRPs, which is coherent joint transmission.
  • the network device uses corresponding antenna ports on different TRPs to transmit the same PDSCH, and uses independent precoding matrices when transmitting on different antenna ports.
  • the precoding matrix is obtained according to the PMI reported by the terminal.
  • the network device can configure different CSI-RS ports for different TRPs, and measure the transmission assumptions of different CJTs by allowing the terminal to measure CSI-RS resources with different numbers of CSI-RS ports. Corresponding CSI, thereby reporting the best CJT transmission hypothesis and corresponding CSI to improve the performance of downlink transmission.
  • FIG. 6 shows a structural block diagram of a CSI reporting device provided by an exemplary embodiment of the present application.
  • the CSI reporting device 600 includes at least some of the following modules: measurement module 620, reporting module 640 and receiving module 660;
  • the measurement module 620 is configured to perform CSI measurements based on multiple CSI-RS port sets.
  • the multiple CSI-RS port sets are different port combinations within one CSI-RS resource or within one CSI-RS resource set. Different CSI-RS resources;
  • the reporting module 640 is configured to report indication information of a target port set among the plurality of CSI-RS port sets, and CSI corresponding to the target port set.
  • each port set in the plurality of CSI-RS port sets includes: at least one port subset; each port subset in the at least one port subset includes consecutive n CSI-RS Port; where n is an integer greater than 1.
  • the number of port subsets in different CSI-RS port sets is not exactly the same; or, there are at least two CSI-RS port sets with different numbers of port subsets.
  • different CSI-RS port sets include the same port subset; or, the different CSI-RS port sets include port subsets that occupy the same resources.
  • each port subset is configured with an independent P_offset; where P_offset is the power difference between the CSI-RS port and the PDSCH in the port subset.
  • each port subset is configured with an independent TCI state.
  • the CSI includes PMI; the PMI is obtained based on the codebook of m ports or the codebook of n ports; where m is the number of ports in the target port set.
  • the PMI is obtained based on an n-port codebook;
  • the CSI includes K pieces of PMI information, each PMI information corresponding to a port subset;
  • K is the number of the port subsets in the target port set.
  • the target port set includes at least one of the following:
  • the first type of CSI-RS port set is a CSI-RS port set including at least two port subsets among the plurality of CSI-RS ports;
  • the second type of CSI-RS port set is all The CSI-RS port set in which the plurality of CSI-RS ports includes only one port subset;
  • the third type of CSI-RS port set is the CSI in which the plurality of CSI-RS ports includes two port subsets. -RS port collection.
  • different CSI-RS port sets among the plurality of CSI-RS port sets correspond to different CJT transmission assumptions.
  • the apparatus further includes: a receiving module 660, configured to receive different CSI-RS port combinations within the one CSI-RS resource configured by the network device;
  • the different CSI-RS port combinations within one CSI-RS resource are all possible combinations of port subsets included in the CSI-RS resource.
  • different CSI-RS port combinations within one CSI-RS resource use an index configuration of a port subset; or different CSI-RS port combinations within one CSI-RS resource use a bitmap Configuration, each bit in the bitmap is used to indicate a CSI-RS port combination.
  • the number of CSI-RS ports included in different CSI-RS resources within one CSI-RS resource set is not exactly the same;
  • At least two CSI-RS resources in one CSI-RS resource set include different numbers of CSI-RS ports.
  • different CSI-RS resources within the one CSI-RS resource set use the same P_offset; where P_offset is the power difference between the CSI-RS port and the PDSCH in the CSI-RS resource.
  • the indication information is indication information of port combinations
  • the indication information is CSI-RS resource indication information.
  • the CSI includes at least two PMI information, and the relative amplitude and/or relative phase between the at least two PMI information;
  • the at least two pieces of PMI information correspond to different CSI-RS ports in the target port set.
  • the CSI includes at least three PMI information, wherein at least one PMI information corresponds to all CSI-RS ports in the target port set, and at least the other two PMI information corresponds to each of the target port sets. different CSI-RS ports.
  • the device further includes: a receiving module 660, configured to receive the same PDSCH on the antenna ports corresponding to the target port set.
  • the device provided in this embodiment allows the terminal to measure different CSI-RS port combinations or CSI-RS resources containing different port subsets to measure the CSI corresponding to different CJT transmission assumptions, thereby reporting the target recommended by the terminal. Based on the CSI of the port set, such as the CJT transmission hypothesis corresponding to the target port set, the network device can select the best current CJT transmission solution to improve the performance of downlink transmission.
  • FIG. 7 shows a structural block diagram of a CSI receiving device provided by an exemplary embodiment of the present application.
  • the CSI receiving device 700 includes at least some of the following modules: a configuration module 720, a receiving module 740 and a sending module 760;
  • the configuration module 720 is used to configure multiple CSI-RS port sets.
  • the multiple CSI-RS port sets are different port combinations within one CSI-RS resource or different CSI-RS port sets within one CSI-RS resource set.
  • the receiving module 740 is configured to receive indication information of a target port set among the plurality of CSI-RS port sets, and CSI corresponding to the target port set.
  • each of the plurality of CSI-RS port sets includes at least one port subset; different port subsets correspond to CSI-RS ports for different TRP transmissions, and each port subset The set includes n consecutive CSI-RS ports; where n is an integer greater than 1.
  • the number of port subsets in different CSI-RS port sets is not exactly the same; or, there are at least two CSI-RS port sets with different numbers of port subsets.
  • different CSI-RS port sets include the same port subset
  • the different CSI-RS port sets include port subsets occupying the same resources.
  • the configuration module 720 is also used to configure an independent P_offset for each port subset
  • P_offset is the power difference between the CSI-RS port and PDSCH.
  • the configuration module 720 is also used to configure an independent TCI state for each of the port subsets.
  • the CSI includes PMI, and the PMI is obtained based on an m-port codebook or an n-port codebook;
  • m is the number of ports in the target port set.
  • the PMI is obtained based on an n-port codebook, and the CSI includes K pieces of PMI information, each PMI information corresponding to a port subset;
  • K is the number of port subsets included in the target port set.
  • different CSI-RS port sets among the multiple CSI-RS port sets correspond to different TRP transmission combinations.
  • the configuration module 720 is also used to configure different CSI-RS port combinations within the one CSI-RS resource.
  • different CSI-RS port combinations within one CSI-RS resource use an index configuration of a port subset; or different CSI-RS port combinations within one CSI-RS resource use a bitmap Configuration, each bit in the bitmap is used to indicate a CSI-RS port combination.
  • the number of CSI-RS ports included in different CSI-RS resources in the one CSI-RS resource set is not exactly the same; or, at least two CSI-RS ports in the one CSI-RS resource set
  • the resources include different numbers of CSI-RS ports.
  • different CSI-RS resources within one CSI-RS resource set use the same transmission power.
  • the indication information is the indication information of the CSI-RS port combination
  • the indication information is CSI-RS resource indication information.
  • the CSI includes at least two PMI information, and the relative amplitude and/or relative phase between the at least two PMI information;
  • the at least two pieces of PMI information correspond to different CSI-RS ports in the target port set.
  • the CSI includes at least three PMI information, wherein at least one PMI information corresponds to all CSI-RS ports in the target port set, and at least the other two PMI information corresponds to each of the target port sets. different CSI-RS ports.
  • the device further includes the sending module 760, configured to transmit the same PDSCH on the ports corresponding to the target port set.
  • the device provided in this embodiment configures CSI-RS resources to the terminal through network equipment, and the terminal measures different CSI-RS port combinations or CSI-RS resources containing different port subsets to measure different CJT transmission hypotheses.
  • the corresponding CSI is used to report the CSI of the target port set recommended by the terminal. For example, assuming that the target port set corresponds to the CJT transmission with the best measurement quality, the network device can select the current best CJT transmission scheme to improve the performance of downlink transmission.
  • Figure 8 shows a schematic structural diagram of a communication device (terminal or network device) provided by an exemplary embodiment of the present application.
  • the communication device includes: a processor 801, a receiver 802, a transmitter 803, a memory 804 and a bus 805.
  • the processor 801 includes one or more processing cores.
  • the processor 801 executes various functional applications and information processing by running software programs and modules.
  • the receiver 802 and the transmitter 803 can be implemented as a communication component, which can be a communication chip, and the communication component can be called a transceiver.
  • Memory 804 is connected to processor 801 through bus 805.
  • the memory 804 can be used to store at least one instruction, and the processor 801 is used to execute the at least one instruction to implement each step in the above method embodiment.
  • memory 804 may be implemented by any type of volatile or non-volatile storage device, or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-only memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), static random access memory (Static Random Access Memory, SRAM), read-only memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
  • magnetic or optical disks electrically erasable programmable Read-only memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), static random access memory (Static Random Access Memory, SRAM), read-only memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory
  • the processor and transceiver in the CSI reporting device involved in the embodiments of the present application can perform the steps performed by the terminal or the network device in the methods shown in the above embodiments, which will not be described again here.
  • a computer-readable storage medium in which at least one instruction, at least a program, a code set or an instruction set is stored, and the at least one instruction, the At least one program, the code set or the instruction set is loaded and executed by the processor to implement the CSI reporting method executed by the terminal and/or the CSI receiving method executed by the network device provided by each of the above method embodiments.
  • a chip is also provided.
  • the chip includes programmable logic circuits and/or program instructions. When the chip is run on a computer device, it is used to implement the execution by a terminal as described in the above aspect.
  • the CSI reporting method, and/or the CSI receiving method performed by the network device.
  • a computer program product is also provided.
  • the computer device When the computer program product is run on a processor of a computer device, the computer device performs the CSI reporting method performed by a terminal as described in the above aspect, and/or , the CSI reception method performed by the network device.

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Abstract

La présente demande porte sur le domaine des communications sans fil et concerne un procédé et un appareil de rapport de CSI, un procédé et un appareil de réception de CSI, un dispositif et un support de stockage. Le procédé comprend : la configuration, par un dispositif réseau, d'une pluralité d'ensembles de ports CSI-RS, et la réalisation, par un terminal d'une mesure de CSI sur la base de la pluralité d'ensembles de ports de CSI-RS, la pluralité d'ensembles de ports de CSI-RS étant différentes combinaisons de ports dans une ressource de CSI-RS ou différentes ressources de CSI-RS dans un ensemble de ressources de CSI-RS ; et le rapport d'informations d'indication d'un ensemble de ports cibles et des CSI correspondant à l'ensemble de ports cibles.
PCT/CN2022/101933 2022-06-28 2022-06-28 Procédé et appareil de rapport de csi, procédé et appareil de réception de csi, dispositif et support de stockage WO2024000164A1 (fr)

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Citations (5)

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