Method and device for measuring channel state information

Abstract

The embodiment of the present application provides a method and apparatus for measuring channel state information, including: a terminal device receives configuration information from a network device, the configuration information includes first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI based on N channel measurement signal resources; N is less than or equal to K; the terminal device measures the N channel measurement signal resources according to the configuration information, and calculates the aggregated CSI based on the N measurement results. The embodiment of the present application can reduce the number of time domain symbols occupied when performing CSI measurement by aggregate measurement of multiple channel measurement signal resources, which is beneficial for the network device to use the time domain symbol shutdown function to reduce network-side energy consumption, and provides a possibility for reducing the power consumption of the network device.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for measuring channel state information (CSI). Background Art

[0002] In a wireless communication system, a base station allocates time-frequency resources to a terminal device based on CSI. The CSI is measured by the terminal device based on a reference signal sent by the base station and fed back to the base station. The CSI includes rank indicator (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), etc. During the CSI measurement process, the terminal device can measure the channel quality at the current moment based on the channel state information reference signal (CSI-RS) sent by the base station, and then feed it back to the base station.

[0003] In CSI measurement, CSI measurement of multiple antenna ports is usually supported. In order to measure the channel on each antenna port of the base station, the number of CSI-RS ports is usually configured to be consistent with the number of antenna ports. The more CSI-RS ports there are, the more RF channels the base station has, and the stronger the ability to transmit multi-stream data in parallel. In large-scale array antenna technology, the number of RF channels can reach 32 or 64 or more.

[0004] However, although a large number of ports configured in CSI measurement can effectively improve system capacity, a large number of ports configured in CSI measurement consumes more power in the base station and has a higher operating cost. Summary of the invention

[0005] The present application provides a method and device for measuring channel state information, which makes it possible to reduce the power consumption of network equipment.

[0006] A first aspect of an embodiment of the present application provides a method for measuring channel state information, including:

[0007] The terminal device receives configuration information from the network device, and the configuration information includes first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI based on N channel measurement signal resources; N is less than or equal to K; the terminal device measures the N channel measurement signal resources according to the configuration information, and calculates the aggregated CSI based on the N measurement results; the aggregated CSI is the CSI of M antenna ports, M is the sum of the number of antenna ports of the N channel measurement signal resources. By measuring the aggregate of multiple channel measurement signal resources, the number of time domain symbols occupied by the channel measurement signal resources when performing CSI measurement can be reduced, which is conducive to the network device using the time domain symbol shutdown function to reduce network side energy consumption, and provides the possibility of reducing the power consumption of network devices.

[0008] In one possible design, N is less than K, and the second indication information includes: indexes of N channel measurement signal resources among the K channel measurement signal resources, and indication information for indicating aggregated measurement CSI. In this way, N channel measurement signal resources can be obtained according to the indexes of the N channel measurement signal resources, which have been used for aggregated measurement CSI.

[0009] In one possible design, N is equal to K, the second indication information is information enabling feedback of aggregated CSI, and the method further includes: the terminal device sends the aggregated CSI to the network device according to the second indication information. In this way, the network device can perform resource scheduling, etc. according to the aggregated CSI fed back by the terminal device.

[0010] In one possible design, the terminal device calculates the aggregated CSI based on N measurement results, including: the terminal device calculates the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the terminal device receiving antennas, precoding measured by the terminal device, interference covariance matrix and noise variance.

[0011] In a possible design, the configuration information further includes: third indication information, used to indicate that the terminal device measures the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used for the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used for other devices to measure CSI. In this way, the time domain symbols of each time unit can be fully utilized, thereby reducing the number of time domain symbols, providing a possibility for reducing the energy consumption of the base station.

[0012] In one possible design, the third indication information includes a time unit offset parameter.

[0013] In one possible design, the third indication information includes: one or more time units, and a time unit offset parameter corresponding to each time unit.

[0014] In one possible design, the third indication information includes: indication information used to indicate periodic measurement.

[0015] In a possible design, the terminal device receives fourth indication information from the network device, where the fourth indication information is used to activate or deactivate aggregate measurement.

[0016] In a possible design, the terminal device receives fifth indication information from the network device, and the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N. In this way, it is possible to adapt to dynamic changes in antenna ports, avoid multiple and repeated configurations of channel measurement signal resources of different antenna ports, and corresponding measurement and feedback information, and save configuration resources.

[0017] In a possible design, the terminal device sends CSI corresponding to one or more channel measurement signal resources among N channel measurement signal resources to the network device, which can be used as a reference for the network device in subsequent resource scheduling to achieve more flexible resource scheduling.

[0018] A second aspect of an embodiment of the present application provides a method for measuring channel state information, including:

[0019] The network device generates configuration information, which includes first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI based on N channel measurement signal resources; N is less than or equal to K; the network device sends the configuration information to the terminal device.

[0020] In one possible design, N is less than K, and the second indication information includes: indexes of N channel measurement signal resources among K channel measurement signal resources, and indication information used to indicate aggregated measurement CSI.

[0021] In one possible design, N is less than K, the second indication information is information for enabling feedback of aggregated CSI, and the method further includes: the network device receives aggregated CSI from the terminal device; the aggregated CSI is the CSI of M antenna ports, and M is the sum of the number of antenna ports of N channel measurement signal resources.

[0022] In a possible design, the configuration information also includes: a third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used for the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used for other devices to measure CSI.

[0023] In one possible design, the third indication information includes a time unit offset parameter.

[0024] In one possible design, the third indication information includes: one or more time units, and a time unit offset parameter corresponding to each time unit.

[0025] In one possible design, the third indication information includes: used to indicate that channel measurement signal resources within multiple periods are aggregated for measurement.

[0026] In one possible design, the method further includes: the network device shuts down the radio frequency channel that does not send orthogonal frequency division multiplexing OFDM symbols.

[0027] In a possible design, the network device sends fourth indication information to the terminal device, where the fourth indication information is used to activate or deactivate aggregate measurement.

[0028] In one possible design, the network device sends fifth indication information to the terminal device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

[0029] In one possible design, the network device receives CSI corresponding to one or more multi-channel measurement signal resources among N channel measurement signal resources.

[0030] A third aspect of an embodiment of the present application provides a device for measuring channel state information, which is applied to a terminal device, including: a receiving module, used to receive configuration information from a network device, the configuration information including first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI based on N channel measurement signal resources; N is less than or equal to K; a processing module, used to measure the N channel measurement signal resources according to the configuration information, and calculate the aggregated CSI based on the N measurement results; the aggregated CSI is the CSI of M antenna ports, and M is the sum of the number of antenna ports of the N channel measurement signal resources.

[0031] In one possible design, N is less than K, and the second indication information includes: indexes of N channel measurement signal resources among K channel measurement signal resources, and indication information used to indicate aggregated measurement CSI.

[0032] In one possible design, N is less than K, the second indication information is information for enabling feedback of aggregated CSI, and the apparatus further includes: a sending module for sending aggregated CSI to the network device according to the second indication information.

[0033] In one possible design, the processing module is specifically used to calculate the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the receiving antennas of the terminal device, precoding measured by the terminal device, interference covariance matrix and noise variance.

[0034] In a possible design, the configuration information also includes: a third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used for the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used for other devices to measure CSI.

[0035] In one possible design, the third indication information includes a time unit offset parameter.

[0036] In one possible design, the third indication information includes: one or more time units, and a time unit offset parameter corresponding to each time unit.

[0037] In one possible design, the third indication information includes: indication information used to indicate periodic measurement.

[0038] In one possible design, the receiving module is further used to receive fourth indication information from the network device, where the fourth indication information is used to activate or deactivate aggregate measurement.

[0039] In one possible design, a receiving module is used to receive fifth indication information from a network device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

[0040] In one possible design, the sending module is also used to send CSI corresponding to one or more channel measurement signal resources among N channel measurement signal resources to the network device.

[0041] The fourth aspect of an embodiment of the present application provides a device for measuring channel state information, which is applied to a network device, including: a processing module, used to generate configuration information, the configuration information includes first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate a terminal device to measure the aggregated CSI based on N channel measurement signal resources; N is less than or equal to K; a sending module, used to send the configuration information to the terminal device.

[0042] In one possible design, N is less than K, and the second indication information includes: indexes of N channel measurement signal resources among K channel measurement signal resources, and indication information used to indicate aggregated measurement CSI.

[0043] In one possible design, N is less than K, the second indication information is information for enabling feedback of aggregated CSI, and the apparatus further includes: a receiving module for receiving aggregated CSI from a terminal device; the aggregated CSI is the CSI of M antenna ports, where M is the sum of the number of antenna ports of N channel measurement signal resources.

[0044] In a possible design, the configuration information also includes: a third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used for the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used for other devices to measure CSI.

[0045] In one possible design, the third indication information includes a time unit offset parameter.

[0046] In one possible design, the third indication information includes: one or more time units, and a time unit offset parameter corresponding to each time unit.

[0047] In one possible design, the third indication information includes: used to indicate that channel measurement signal resources within multiple periods are aggregated for measurement.

[0048] In one possible design, the apparatus further includes: the network device shuts down the radio frequency channel that does not send orthogonal frequency division multiplexing OFDM symbols.

[0049] In a possible design, the sending module is also used to send fourth indication information to the terminal device, and the fourth indication information is used to activate or deactivate aggregate measurement.

[0050] In one possible design, the sending module is also used to send fifth indication information to the terminal device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

[0051] In one possible design, a receiving module is used to receive CSI corresponding to one or more multi-channel measurement signal resources among N channel measurement signal resources.

[0052] A fifth aspect of an embodiment of the present application provides a communication device, which may be a chip or a system on a chip in a terminal device, including a processor and an interface circuit, the interface circuit being used to receive code instructions and transmit them to the processor; the processor being used to run the code instructions to execute a method as in the first aspect or any possible design of the first aspect.

[0053] A sixth aspect of an embodiment of the present application provides a communication device, which may be a chip or a system on a chip in a terminal device, including a processor and an interface circuit, the interface circuit being used to receive code instructions and transmit them to the processor; the processor being used to run the code instructions to execute a method as in the second aspect or any possible design of the second aspect.

[0054] A seventh aspect of an embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program, and the computer program is used to implement the method in the first aspect or any possible design of the first aspect.

[0055] An eighth aspect of an embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program, and the computer program is used to implement the method in the second aspect or any possible design of the second aspect.

[0056] A ninth aspect of an embodiment of the present application provides a communication system, including the third aspect and the corresponding feasible implementation device and the fourth aspect and the corresponding feasible implementation device.

[0057] It should be understood that the second to ninth aspects of the embodiments of the present application correspond to the technical solutions of the first aspect of the embodiments of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic diagram of a scenario in which the method for measuring channel state information provided in an embodiment of the present application is applied;

[0059] Figure 2 A flowchart of a method for measuring general status information;

[0060] Figure 3 Schematic diagram of the time-frequency position of a common CSI-RS;

[0061] Figure 4 A schematic diagram of a flow chart of a method for measuring channel state information provided in an embodiment of the present application;

[0062] Figure 5 A schematic diagram for comparing the time-frequency positions of two CSI-RS;

[0063] Figure 6 Another schematic diagram for comparing the time-frequency positions of two CSI-RS;

[0064] Figure 7 A flowchart of another method for measuring channel state information provided in an embodiment of the present application;

[0065] Figure 8 A schematic diagram of measuring multiple terminal devices based on CSI-RS resources in two time slots;

[0066] Fig. 9 A schematic diagram of the change of antenna ports of network equipment;

[0067] Fig.10 A schematic diagram of the structure of a device for measuring channel state information provided in an embodiment of the present application;

[0068] Fig.11 A schematic diagram of the structure of another channel state information measurement device provided in an embodiment of the present application;

[0069] Fig.12 A schematic diagram of the hardware structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0070] The method of the embodiment of the present application can be applied in long term evolution (LTE), and can also be applied in a fifth generation mobile communication (5 Generation, 5G) system, or a future mobile communication system.

[0071] Figure 1 This is a schematic diagram of the structure of the communication system provided in the embodiment of the present application. Figure 1 As shown, the communication system may include: network device 01 and terminal device 021, terminal device 022, terminal device 023 and terminal device 024; it can be understood that the number of terminal devices included in the communication system can be set according to the actual application scenario, for example, including one terminal device, or including multiple terminal devices, which is not limited in the embodiment of the present application. Considering that the process of performing CSI measurement between network device 01 and each terminal device is similar, the process of performing CSI measurement between network device 01 and any terminal device is used as an example to illustrate in the embodiment of the present application.

[0072] In the embodiments of the present application, the execution subject of the network device side method may be a network device or a device in the network device (it should be noted that the embodiments provided in the present application are described by taking the network device as an example). Exemplarily, the device in the network device may be a chip system, a circuit or a module, etc., which is not limited in the present application.

[0073] The network devices involved in the embodiments of the present application may include but are not limited to: base stations, transmission reception points (TRxP). Among them, base stations: also known as radio access network (RAN) equipment, are devices that connect terminals to wireless networks, and can be base stations (base transceiver station, BTS) in global system of mobile communication (GSM) or code division multiple access (CDMA), or base stations (nodeB, NB) in wideband code division multiple access (WCDMA), or evolutionary base stations (eNB or eNodeB) in long term evolution (LTE), or relay stations or access points, or base stations (gNodeB, gNB) in future 5G networks, etc., which are not limited here.

[0074] In the embodiments of the present application, the execution subject of the terminal device (or referred to as the terminal) side method may be the terminal device, or may be a device in the terminal device (it should be noted that the embodiments provided in the present application are described by taking the terminal device as an example). Exemplarily, the device in the terminal device may be a chip system, a circuit or a module, etc., which is not limited in the present application.

[0075] The terminal device involved in the embodiments of the present application. The terminal can be a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and / or other business data connectivity to the user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA) and other devices. A wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, an access terminal, a user terminal, a user agent, or a user device or user equipment (UE), without limitation herein.

[0076] The terminal device or network device involved in the embodiment of the present application may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software.

[0077] In such Figure 1In the communication system shown, the terminal device can send downlink data to the terminal devices UE1-UE4, and the terminal devices UE1-UE4 can also send uplink data to the network data.

[0078] Generally, in a wireless communication system, communication can be divided into different types according to the types of sending nodes and receiving nodes. For example, sending information from a network device to a terminal device is called downlink (DL) communication, and sending information from a terminal device to a network device is called uplink (UL) communication.

[0079] In the fourth generation (4G) and fifth generation (5G) wireless communication systems (or called new radio access technology (NR) systems), the downlink includes synchronization signal / physical broadcast channel (SS / PBCH), channel state information reference signal (CSI-RS), dedicated demodulation reference signal (DM-RS), physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH) and other signals or channels.

[0080] When the base station, as a network device, allocates time-frequency resources to the terminal, in order to match the changes in channel information and interference information between the base station and the terminal, it is necessary to measure channel state information (CSI), mainly including rank indicator (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), etc. For example, in a specific CSI measurement process, the terminal measures the channel quality at the current moment according to the CSI-RS sent by the base station, and then feeds back to the base station.

[0081] For example, Figure 2 FIG. 1 is a schematic diagram of a common CSI measurement process. Figure 2 As shown, it may include:

[0082] S201: The base station configures CSI-RS measurement and feedback parameters through radio resource control (RRC) signaling. The RRC information elements (IE) involved mainly include CSI-MeasConfig, CSI-ResourceConfig, CSI-ReportConfig, etc. (see 3GPP TS 38.331 for details). Among them, the parameters of CSI-RS resources need to be configured in CSI-MeasConfig, including resource index, number of ports, time-frequency position, time-frequency density, etc. The feedback content is configured in CSI-ReportConfig IE, including CQI, PMI, RI feedback, etc.

[0083] S202: The terminal performs CSI measurement according to the CSI-RS resource measurement configuration information and the CSI feedback content configuration information.

[0084] S203: The terminal feeds back CSI content, including CQI, PMI, RI, etc., through an uplink control channel or an uplink data channel.

[0085] S204: The base station performs scheduling according to the CSI information fed back by the terminal, such as completing time-frequency resource allocation, modulation and coding scheme (MCS) selection, data transmission block size selection, etc. and prepares to send the physical downlink control channel (PDCCH) and the physical downlink share channel (PDSCH). PDCCH is used to indicate the time-frequency resource information allocated to the terminal, and PDSCH is used to send service data.

[0086] S205: The base station sends the PDCCH and PDSCH to the terminal.

[0087] S206: The terminal receives the PDCCH and PDSCH and completes data demodulation.

[0088] The configuration information of the CSI-RS resource is indicated by the RRC layer parameter CSI-ResourceConfig, which defines the CSI-RS resource set and the CSI-RS resource index, etc. For a detailed description of each parameter in CSI-ResourceConfig, please refer to 3GPP TS 38331, which will not be repeated here. Different CSI-ResourceConfig configuration information can be distinguished by the CSI-ResourceConfigId parameter.

[0089] The feedback content of CSI is configured by the RRC layer parameter CSI-ReportConfig IE. For detailed description of each parameter in CSI-ReportConfig IE, please refer to 3GPP TS 38331, which will not be repeated here.

[0090] It should be noted that the CSI-ReportConfig in the CSI feedback content and the CSI-ResourceConfig of the CSI-RS resource configuration information are interrelated. The content to be fed back in CSI-ReportConfig is obtained based on the CSI-RS resources configured in CSI-ResourceConfig. Both CSI-ReportConfig and CSI-ResourceConfig include CSI-ResourceConfigId, that is, CSI-ReportConfig can find the corresponding CSI-RS resource configuration through CSI-ResourceConfigId.

[0091] In addition, for the specific time-frequency position of CSI-RS resources, please refer to Table 7.4.1.5.3-1 in TS 3GPP TS 38.212. The current NR standard supports CSI measurement under up to 32 antenna ports. The following takes 32 ports as an example to describe the time-frequency position configuration of CSI-RS, as shown in Table 1. In the table, CDM-Type, time domain symbols l0 and l1, and frequency domain positions k0 and k1 are configured by the RRC layer parameter CSI-RS-ResourceMapping. The CSI-RS-ResourceMapping IE is included in each CSI-RS resource configuration, namely the NZP-CSI-RS-Resource IE. In the NZP-CSI-RS-Resource IE, different CSI-RS resources are distinguished by the parameter NZP-CSI-RS-ResourceId. The CSI-ResourceConfig IE indicates which NZP-CSI-RS-ResourceIds are included.

[0092] Table 1: CSI-RS locations within a slot.

[0093]

[0094] According to the three configurations of CDM8, CDM4, and CDM2 in the above table (corresponding to row indexes 16, 17, and 18 in the table respectively), the time-frequency position of CSI-RS is as follows: Figure 3As shown in the figure, each grid represents a resource element (RE), that is, a subcarrier.

[0095] During the CSI measurement process, since the base station is configured with multiple antennas, it usually supports CSI measurement of multiple antenna ports. In order to measure the channel on each antenna port of the base station, the number of CSI-RS ports is usually configured to be consistent with the number of antenna ports.

[0096] The typical number of CSI-RS ports is 2, 4, 8, 16, and 32. The more CSI-RS antenna ports there are, the more RF channels the base station has, and the stronger its ability to transmit multi-stream data in parallel. In large-scale array antenna technology, the number of RF channels can reach 32 or 64, and the maximum number of CSI-RS antenna ports can reach 32.

[0097] However, although a large number of ports configured in CSI measurement can effectively improve system capacity, a large number of ports configured in CSI measurement consumes more power in the base station and has a higher operating cost.

[0098] According to analysis, the radio remote unit (RRU) accounts for nearly 70% to 80% of the total power consumption of the base station. The power consumption of the RRU increases with the number of radio frequency channels. When performing CSI measurements on multiple terminal devices, the more resources configured for CSI-RS, the more orthogonal frequency division multiplexing (OFDM) symbols are occupied, and the more radio frequency channels are used to send OFDM symbols, resulting in greater power consumption of the base station.

[0099] Based on this, in the CSI measurement provided in the embodiment of the present application, by aggregating and measuring multiple CSI-RS resources, the number of time domain symbols occupied by CSI-RS when performing CSI measurement can be reduced, which is beneficial for network equipment to utilize the time domain symbol shutdown function to reduce network side energy consumption, thereby providing a possibility for reducing the power consumption of network equipment.

[0100] The CSI measurement method of the embodiment of the present application can be applied to Figure 1 The application scenario shown can also be used in other communication systems with uplink and downlink communication links, and the embodiments of the present application do not specifically limit this.

[0101] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and following associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0102] In the embodiments of the present application, "first", "second", "third", etc. may be used to distinguish and describe the application of nouns in different scenarios. In actual applications, "first", "second", "third", etc. may not be included and do not constitute a limitation on the embodiments of the present application.

[0103] The channel measurement signal resource involved in the embodiment of the present application can be used to indicate the time-frequency position of the measurement signal, the number of antenna ports, etc. For example, the channel measurement signal resource can be a CSI-RS resource, etc.

[0104] The aggregate measurement involved in the embodiment of the present application may be to jointly measure the CSI of a high number of antenna ports by aggregating multiple channel measurement signal resources of a low number of antenna ports. The channel measurement signal may be, for example, a CSI-RS or other signal for channel measurement, which is not specifically limited in the embodiment of the present application.

[0105] The aggregated CSI involved in the embodiments of the present application may be CSI obtained based on aggregated measurement. Taking the aggregated CSI obtained by aggregated measurement of N CSI-RS resources as an example, the aggregated CSI is the CSI of M antenna ports, then M is the sum of the number of antenna ports of the N CSI-RS resources, and N is greater than or equal to 2. It can be understood that in the embodiments of the present application, the definition of aggregated CSI is used to distinguish it from the existing CSI, so as to facilitate the explanation of the embodiments of the present application. In actual applications, "aggregated CSI" may be referred to as "CSI", etc., and the embodiments of the present application do not make specific limitations on this.

[0106] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be implemented independently or in combination with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0107] Figure 4A flow chart of a method for measuring channel state information provided in an embodiment of the present application is shown as follows: Figure 4 As shown, the method includes:

[0108] S401: The network device sends configuration information for aggregate measurement to the terminal device.

[0109] In an embodiment of the present application, the configuration information is generated by a network device, and the configuration information may include first indication information and second indication information. The first indication information is used to indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to indicate that the terminal device measures the aggregated CSI based on N channel measurement signal resources, N is less than or equal to K.

[0110] The first indication information may include configuration information of K channel measurement signal resources, such as one or more of the channel measurement signal resource index, port number, time-frequency position, time offset, periodic and non-periodic transmission, etc. Based on the first indication information, the terminal device may obtain K channel measurement signal resources for subsequent aggregate measurement.

[0111] The second indication information may be any character, number, etc. When the second indication information is included in the configuration information, it may instruct the terminal device to measure the aggregated CSI based on N channel measurement signal resources among the K channel measurement signal resources.

[0112] In a possible implementation, N is less than K, and the second indication information may include indexes of N channel measurement signal resources among the K channel measurement signal resources, and indication information for indicating the aggregation of N channel measurement signal resources to measure CSI.

[0113] In a possible implementation, N is equal to K, and the second indication information may include indication information for indicating that the CSI is measured by aggregating N channel measurement signal resources. For example, the second indication information may be information for enabling feedback of aggregated CSI. When the second indication information is configured as 1, feedback of CSI measured based on aggregated CSI-RS resources is enabled, and specific CSI includes CQI, PMI, RI, etc. When the second indication information is configured as 0, the CSI obtained based on the aggregated measurement is not fed back.

[0114] In the embodiment of the present application, the first indication information and the second indication information may be sent via one signaling or via multiple signalings, and the embodiment of the present application does not specifically limit this.

[0115] Exemplarily, the network device may send configuration information including the first indication information and the second indication information through RRC signaling. The configuration information may include CSI-MeasConfig, CSI-ResourceConfig, CSI-ReportConfig IE, etc. The configuration of CSI-MeasConfig and CSI-ResourceConfig may follow the usual solution. In CSI-ReportConfig, unlike the usual technical solution, the first indication information and the second indication information may be configured in the parameter.

[0116] For example, new fields "AggregatedCsiResourcesForChannelMeasurement indication of CSI-RS resource aggregation for channel measurement" and "AggregatedCsiReportFlag indication of aggregated CSI feedback enabling information" are added to the RRC parameter CSI-ReportConfig IE.

[0117] Exemplarily, the following is a schematic diagram of adding the RRC information parameter configuration of AggregatedCsiResourcesForChannelMeasurement and AggregatedCsiReportFlag in the CSI-ReportConfig IE:

[0118]

[0119]

[0120] Among them, the value of the AggregatedCsiResourcesForChannelMeasurement field can be CSI-ResourceConfigId. CSI-ResourceConfigId is associated with CSI-ResourceConfig IE. For example, each CSI-ResourceConfig IE contains CSI-ResourceConfigId. The specific CSI-RS resource set will be indicated in the CSI-ResourceConfig IE, and the CSI-RS resource set includes a CSI-RS resource index, such as the CSI-RS resource index NZP-CSI-RS-ResourceId, and the parameter NZP-CSI-RS-ResourceI is used to distinguish different CSI-RS resources.

[0121] When AggregatedCsiReportFlag is configured as 1, the CSI information measured based on the aggregated CSI-RS resources can be fed back, and the specific CSI information includes CQI, PMI, RI, etc. When AggregatedCsiReportFlag is configured as 0, no feedback is required.

[0122] In the specific implementation, the time-frequency position of CSI-RS can be configured by the RRC layer parameter CSI-RS-ResourceMapping. CSI-RS-ResourceMapping IE is included in each CSI-RS resource configuration, such as NZP-CSI-RS-ResourceIE. In NZP-CSI-RS-Resource IE, different CSI-RS resources are distinguished by the parameter nzp-CSI-RS-ResourceId. The CSI-ResourceConfig IE will indicate which nzp-CSI-RS-ResourceIds are included.

[0123] It is understandable that the network device may also use other signaling to send configuration information, the first indication information and the second indication information may also be independent of the usual configuration information, and in the above exemplary configuration process, the name of each parameter may also be replaced with other content according to the actual application, and the embodiments of the present application do not specifically limit this.

[0124] In actual communications, the different positions and channels of each user will cause the network device to send different beam directions to the terminal device. In order to improve the gain of waveform shaping during CSI measurement, different beam directions will be weighted on CSI-RS. Therefore, when measuring multiple terminal devices, the network device can configure different CSI-RS resources for different terminal devices for measurement.

[0125] Figure 5 A comparison diagram of possible CSI-RS resource time-frequency positions when using conventional CSI measurement and possible CSI-RS resource time-frequency positions after CSI-RS resource aggregation is shown.

[0126] in, Figure 5 a is a schematic diagram of possible CSI-RS resource time-frequency positions when conventional CSI measurement is used, and CSI-RS has 32 antenna ports. Figure 5The time-frequency positions of two CSI-RS resources are shown in a, where each grid represents a resource element (RE). If CSI-RS resource 1 is allocated to terminal 1 and CSI-RS resource 2 is allocated to terminal 2, then if CSI-RS resource 3 is to be used to measure terminal 3, since there are only 16 REs left in the 4 OFDM symbols of CSI-RS resource 1, it can only support CSI-RS resources for 16 antenna ports, and there are only 16 REs left in the 4 OFDM symbols of CSI-RS resource 3, it can only support CSI-RS resources for 16 antenna ports, so CSI-RS resource 3 with 32 antenna ports can only be measured in the next time slot. That is, in the usual CSI measurement, a total of 12 OFDM symbols are required to measure 3 terminals.

[0127] Figure 5 b is a comparison diagram of possible CSI-RS resource time-frequency positions after CSI-RS resource aggregation. If CSI-RS resource 1 is allocated to terminal 1 and CSI-RS resource 2 is allocated to terminal 2, then if CSI-RS resource 3 is to be used to measure terminal 3, two CSI-RS resources with 16 antenna ports (such as CSI-RS4 and CSI-RS5) can be configured to aggregate into a CSI-RS resource 3 with 32 antenna ports. The two CSI-RS resources with 16 antenna ports can share OFDM symbols with CSI-RS resource 1 and CSI-RS resource 3, respectively, so that the CSI measurement of 3 terminals can be completed through 8 OFDM symbols, saving the number of OFDM symbols.

[0128] Figure 6 Another possible CSI-RS resource time-frequency position when using conventional CSI measurement and a comparison diagram of possible CSI-RS resource time-frequency positions after CSI-RS resource aggregation are shown.

[0129] in, Figure 6 a is a schematic diagram of possible time-frequency positions of CSI-RS resources when using conventional CSI measurement. The CSI-RS has 32 antenna ports, and configuring two CSI-RS resources with 32 antenna ports requires 8 OFDM symbols.

[0130] Figure 6 b is a comparison diagram of the possible time-frequency positions of CSI-RS resources after CSI-RS resource aggregation. By aggregating the CSI-RS resources of two 16-antenna ports, only 6 OFDM symbols are needed to complete the CSI measurement of two 32-antenna ports.

[0131] In the embodiment of the present application, the CSI information of 64 antenna ports can be measured by using the aggregate measurement method, for example, two CSI-RS resources of 32 antenna ports, or four CSI-RS resources of 16 antenna ports, or one CSI-RS resource of 32 antenna ports and two CSI-RS resources of 16 antenna ports. However, the existing technical solutions do not support measuring the CSI information of 64 antenna ports or more antenna ports.

[0132] It can be understood that there are many examples of using multiple CSI-RS resources to aggregate and measure CSI, and the aggregation can be adapted according to actual application scenarios. Examples are not given one by one here.

[0133] Furthermore, the network device can turn off the radio frequency channel that does not send OFDM symbols, or turn off the power amplifier (PA), intermediate frequency, radio frequency unit, filter, etc. in the radio frequency channel, which can reduce the energy consumption of the network device.

[0134] S402: The terminal device measures the aggregated CSI.

[0135] In the embodiment of the present application, the terminal device can measure CSI information based on two or more CSI-RS resources according to the configuration information, such as measuring CSI information of 32 antenna ports according to two CSI-RS resources of 16 antenna ports. For another example, based on two CSI-RS resources of 32 antenna ports, the CSI information of 64 antenna ports is measured. For another example, based on two CSI-RS resources of 16 antenna ports and two CSI-RS resources of 32 antenna ports, the CSI information of 96 antenna ports is measured, and so on.

[0136] Exemplarily, the terminal device may calculate the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the receiving antennas of the terminal device, precoding measured by the terminal device, interference covariance matrix, and variance of noise.

[0137] For example, Figure 5 b takes the measurement of 32-port CSI using two 16-antenna-port CSI-RS resources as an example.

[0138] Assuming that the channel corresponding to the CSI-RS resource 1 of the 16-antenna port is H1, the transmit power is p, and the channel corresponding to the CSI-RS resource 2 of the 16-antenna port is H2, the transmit power is p, the signal to interference and noise ratio calculation process is as follows:

[0139] The signal to interference plus noise ratio (SINR) γ1 of CSI-RS resource 1 based on a 16-antenna port can be calculated to satisfy formula (1):

[0140]

[0141] Where w1 is the weight coefficient on the terminal receiving antenna, v1 is the measured precoding, I1 is the interference covariance matrix, σ 2 is the variance of the noise (ie, the noise power). It can be understood that the above formula may be a certain RE signal to interference plus noise ratio, which may be a common method for calculating SINR.

[0142] The signal to interference plus noise ratio of the CSI-RS resource 2 with 16 antenna ports may also be calculated using the calculation method of the CSI-RS resource 1 with 16 antenna ports, which will not be described in detail here.

[0143] Then the terminal device can calculate the aggregated CSI based on the CSI-RS resources of the two 16 antenna ports, for example, the aggregated SINR (γ aggregaed ) calculation can satisfy formula (2):

[0144]

[0145] Where w is the weight coefficient on the receiving antenna of the terminal device, v is the measured precoding, and I is the interference covariance matrix. Different from formula (1), the channel is measured based on the CSI-RS resources of two 16 antenna ports. Moreover, due to the change in the dimension of the channel, the corresponding precoding matrix v and the receiving weight coefficient w will change accordingly. The calculation of the precoding matrix v also depends on the aggregated channel [H1 H2]. For example, one method is to obtain the eigenvector as the precoding based on the eigenvalue decomposition of the channel, and another method is to obtain the precoding based on the codebook method.

[0146] According to the SINR of each RE, the SINR of each subband (including multiple consecutive RBs) can be calculated, and then the CQI index of each subband can be determined by looking up the SINR threshold corresponding to each modulation mode and code rate in the CQI table. Finally, the terminal device measures the CSI obtained by the aggregated CSI-RS resources, including RI, PMI, RI, etc., and feeds the aggregated measured CSI back to the network device.

[0147] In summary, in the embodiment of the present application, the method of aggregating and measuring multiple channel measurement signal resources is adopted to reduce the occupation of OFDM symbols, which is conducive to network equipment using the time domain symbol shutdown function to reduce network side energy consumption, and provides the possibility of reducing network equipment power consumption. And through the aggregation of channel measurement signal resources, CSI measurement of 64 antenna ports or more can be supported, which is conducive to improving system capacity, thereby reducing data transmission time, and achieving the purpose of energy saving of base stations.

[0148] Optionally, it may also include:

[0149] S403: The terminal device sends the aggregated CSI to the network device.

[0150] In an embodiment of the present application, the terminal device may feed back aggregated CSI to the network device based on an indication of enabling feedback of aggregated CSI.

[0151] Optionally, the terminal device may also feed back CSI corresponding to one or more multi-channel measurement signal resources among the N channel measurement signal resources, so as to provide a reference for the network device in subsequent resource scheduling, which is not specifically limited in the embodiments of the present application.

[0152] S404: The network device performs resource scheduling according to the CSI fed back by the terminal device.

[0153] In the embodiment of the present application, the network device can perform any form of resource scheduling based on the CSI fed back by the base station, and the embodiment of the present application does not specifically limit this.

[0154] Exemplarily, when the network device configures the aggregated measurement and feedback indication information through RRC signaling, the base station side assumes that the CSI information received from the terminal feedback is the result obtained based on the aggregated CSI-RS resources. When sending PDSCH, the precoding used for mapping the data carried by the PDSCH channel to the antenna port is the precoding of formula (2), and when selecting MCS, the CQI obtained based on the SINR in formula (2) can be used. The process of mapping the transmission data to each antenna port can satisfy formula (3):

[0155]

[0156] Where v is the precoding obtained based on the aggregated CSI-RS measurement, y (j-1) (i) is the data mapped on the j-1 layer before precoding, is the precoded signal at the antenna port p ρ-1 The data mapped on the top, j is less than or equal to the Rank fed back by the terminal device. Figure 5 Taking b as an example, v is measured based on the CSI-RS resources of two 16-antenna ports.

[0157] In a specific application, when the network device is not configured with indication information for aggregated measurement and feedback, the network device may continue to use CSI information using an existing technical solution.

[0158] S405: The network device indicates DCI information to the terminal device via PDCCH and sends data via PDSCH.

[0159] S406: The terminal device demodulates the PDSCH data according to the DCI carried by the PDCCH.

[0160] S405 and S406 can be implemented based on common methods and will not be described in detail here.

[0161] Figure 7 A flow chart of a method for measuring channel state information provided in an embodiment of the present application is shown as follows: Figure 7 As shown, the method includes:

[0162] S701: The network device sends configuration information for cross-time unit measurement to the terminal device.

[0163] The time unit in the embodiment of the present application may be a time slot or a subframe, etc. Cross-time unit measurement means that the CSI measurement is based on CSI-RS resources in two or more time units.

[0164] It should be noted that, for the sake of ease of description, the embodiments of the present application will later use cross-slot as an example to illustrate the process of measuring CSI. In a specific application, one slot in NR includes 14 OFDM symbols in the time domain, and one slot in LTE includes 7 OFDM symbols.

[0165] In an embodiment of the present application, the configuration information may include third indication information, and the third indication information is used to instruct the terminal device to measure CSI in multiple time units.

[0166] Exemplarily, the third indication information may include a time unit offset parameter, which may indicate a channel measurement signal resource of a current time unit and a channel measurement signal resource of a time unit that is offset from the current time unit by the time unit offset parameter.

[0167] Alternatively, the third indication information includes: one or more time units, and a time unit offset parameter corresponding to each time unit, and can indicate the channel measurement signal resource of any one or more time units, and the channel measurement signal resource of the time unit offset by the time unit offset parameter.

[0168] For example, the third indication information may include time unit n and time unit offset parameter t, where t is a natural number, and two CSI-RS resources may be configured in time unit n and time unit n+t, respectively. The number of time units may be one or more, and the time unit offset parameter corresponding to any time unit may also be one or more, which is not specifically limited in the embodiments of the present application. For example, the third indication information may include time unit slot n, time unit offset parameter t corresponding to slot n, t+2, and time unit slot m, time unit offset parameter k corresponding to slot m, etc., to configure CSI-RS resources in more than two slots.

[0169] In the embodiment of the present application, the time unit is a slot, the time unit offset parameter is a slot offset parameter, and the channel measurement signal resource is a CSI-RS resource. Different CSI-RS resources can be sent in different slots, and the slot offset can be indicated by the CSI-ResourcePeriodicityAndOffset IE, which can be specifically as follows:

[0170] CSI-ResourcePeriodicityAndOffset information element

[0171]

[0172]

[0173] Among them, slots4 indicates that the CSI-RS is sent in 4 slots, and the specific slot in which the CSI-RS is sent is determined by the slot offset value, that is, the candidate slot offset positions are {0, 1, 2, 3}.

[0174] When the slot offset value is smaller than the CSI-RS transmission period, the existing CSI measurement solution can be directly used.

[0175] When the slot offset value is greater than the CSI-RS transmission period, assuming that the transmission period is 4 slots, CSI-RS resource 1 is sent on slot n, and CSI-RS resource 2 is sent on slot n+5. However, since the period is 4, CSI-RS resource 2 will also appear on slot n+1. Therefore, the CSI-RS resources on slot n and slot n+1 can be directly used for aggregate measurement.

[0176] When the slot offset value is equal to the CSI-RS transmission period, the third indication information may include: indication information for indicating periodic measurement. For example, a new field periodNumberForCrossSlotAgrregation may be added to the CSI-ReportConfig IE to indicate whether to perform CSI-RS aggregation measurement on periodic resources. The value of the periodNumberForCrossSlotAgrregation field may be a positive integer, for example, a value of 2 indicates that the CSI-RS resources of two consecutive periods are aggregated for measurement, which may be described as follows:

[0177] CSI-ReportConfig information element

[0178]

[0179]

[0180] It should be noted that the measurement of CSI in the embodiment of the present application is based on CSI-RS resources in two or more slots, which can avoid the situation where the CSI-RS resources in one slot occupy too many time-frequency resources and cannot measure multiple terminal devices at the same time. The number of time domain symbols occupied by CSI-RS can be reduced.

[0181] For example, Figure 8 A schematic diagram is shown of measuring multiple terminal devices based on CSI-RS resources in two slots.

[0182] in, Figure 8 a can be slot n, Figure 8 b can be slot n+1. If CSI-RS resource 1 is allocated to terminal 1 and CSI-RS resource 2 is allocated to terminal 2, then if CSI-RS resource 3 is to be used for terminal 3, it cannot be supported in slot n, and only one 16-antenna port CSI-RS1 is occupied in slot n+1, then CSI-RS resource 3 can be indicated to share OFDM symbols with 16-antenna port CSI-RS1 in slot n+1, so that 4 additional OFDM symbols are no longer allocated, that is, part of the resources in multiple time units are used for the terminal device to measure the aggregated CSI, and the remaining resources in multiple time units are used for other devices to measure CSI, thereby saving the number of OFDM symbols.

[0183] It can be understood that, for a terminal device, the network device can also instruct the terminal device to measure CSI based on CSI-RS resources of multiple time units, which will not be repeated here.

[0184] S702: The terminal device measures CSI across time units.

[0185] Optionally, it may also include:

[0186] S703: The terminal device sends CSI to the network device.

[0187] S704: The network device performs resource scheduling according to the CSI fed back by the terminal device.

[0188] S705: The network device indicates DCI information to the terminal device via PDCCH and sends data via PDSCH.

[0189] S706: The terminal device demodulates the PDSCH data according to the DCI carried by the PDCCH.

[0190] In the embodiment of the present application, S702, S703, S704, S705 and S706 can be implemented in any common manner and will not be described in detail here.

[0191] It should be noted that Figure 7 The corresponding embodiments can be implemented separately, and the effect of saving OFDM symbols can be achieved by measuring across time units. Furthermore, the network device can shut down the radio frequency channel that does not send OFDM symbols, or shut down the power amplifier (PA), intermediate frequency, radio frequency unit, filter, etc. in the radio frequency channel, thereby reducing the energy consumption of the network device.

[0192] Figure 7 The corresponding embodiments can also be Figure 4 The corresponding embodiments are implemented in combination, for example, the terminal may be instructed to measure the aggregated CSI in multiple time units.

[0193] exist Figure 4 The corresponding embodiments, Figure 7 The corresponding embodiments or Figure 7 The corresponding embodiments and Figure 4 Based on the embodiment combined with the corresponding embodiment, since the number of radio frequency channels may be dynamically turned on or off as the service load changes, the terminal device may need to know whether to continue to measure CSI using the aggregation method or to measure CSI based on a single CSI-RS resource.

[0194] For example, when the load is high, more RF channels can be used to increase system capacity; when the load is low, some channels can be turned off to reduce the energy consumption of the base station. In this case, the terminal device needs to measure the CSI information under different RF channels so that the base station can decide whether to turn on or off the RF channels.

[0195] For example, the antenna port changes as follows: Fig. 9shown. Fig. 9 The oblique lines in different directions represent different antenna polarization directions, and each antenna corresponds to a RF channel.

[0196] The opening or closing of the radio frequency channel is sudden and may not be a periodic operation. Therefore, when performing CSI measurement, it is necessary to notify the terminal of which antenna ports' CSI information should be measured through aperiodic triggering.

[0197] Assume that the network device initially has 32 antenna ports. After 16 antenna ports are closed, the terminal device needs to know whether it should continue to measure CSI using the aggregation method or measure CSI based on a single CSI-RS resource.

[0198] To address this problem, in a possible implementation, the network device may send fourth indication information to the terminal device to activate aggregate measurement or "deactivate" (ie, disable aggregate measurement) aggregate measurement.

[0199] Exemplarily, a new field may be introduced in DCI signaling to activate or “deactivate” aggregate measurement, as shown in Table 2.

[0200] Table 2

[0201]

[0202] When AggreationTriggerFlag is configured to 0, the terminal device will not perform aggregate measurement of multiple CSI-RS resources, but directly perform CSI measurement based on the most recent CSI-RS resource. The fed-back CSI is also based on the information measured from one CSI-RS resource. When AggreationTriggerFlag is configured to 1, the terminal device will measure the aggregated CSI based on multiple CSI-RS resources and feed back the aggregated CSI to the network device.

[0203] In one possible implementation, the network device may choose to activate some CSI-RS resources for aggregation to measure CSI. The network device may send a fifth indication information to the terminal device to activate some CSI-RS resources or deactivate some CSI-RS resources for aggregate measurement. For example, there are N pre-configured CSI-RS resources for aggregate measurement, and only N1 of them are activated or deactivated, where N1 is less than or equal to N.

[0204] Exemplarily, a new field may be introduced in the DCI signaling or redundant bits of an existing field may be used to activate the CSI-RS resources for aggregate measurement or to "deactivate" (i.e., disenable aggregate measurement) the CSI-RS resources for aggregate measurement. One method is to use a bitmap to indicate the CSI-RS resources to be activated or "deactivated". For example, if N CSI-RS resources are pre-configured for aggregate measurement, N bits are used to indicate the status of the corresponding CSI-RS resources. When the first bit value is 0, it indicates "deactivation" of the first CSI-RS resource, and when the first bit value is 1, it indicates activation of the first CSI-RS resource. Similarly, the bit at each position indicates the status of the corresponding CSI-RS resource. One numbering rule is to sort the N CSI-RS resources from low to high according to the index of the CSI-RS resource, with the CSI-RS resource with the lowest index corresponding to the first bit position, and the CSI-RS resource with the highest index corresponding to the Nth bit position.

[0205] Furthermore, the network device can determine, based on the configuration of the RRC signaling and the DCI signaling, whether the CSI content fed back by the terminal device is obtained by measuring the aggregated CSI-RS or by measuring a single CSI-RS.

[0206] In the embodiment of the present application, the dynamic change of the antenna port can be adapted. For example, when the antenna port is reduced from 32 to 16, one of the aggregated CSI-RS resources can be directly used for measurement. When the antenna port is increased from 16 to 32, two or more aggregated CSI-RS resources can be used for measurement. This avoids multiple and repeated configurations of CSI-RS resources for different antenna ports, as well as corresponding measurement and feedback information.

[0207] Reference Fig.10 , showing a schematic diagram of the structure of a device for measuring channel state information in an embodiment of the present application. The device for measuring channel state information in an embodiment of the present application includes a receiving module 1001 and a processing module 1002. Among them, the receiving module is used to receive configuration information from a network device, and the configuration information includes first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI according to N channel measurement signal resources; N is less than or equal to K; the processing module is used to measure the N channel measurement signal resources according to the configuration information, and calculate the aggregated CSI according to the N measurement results; the aggregated CSI is the CSI of M antenna ports, and M is the sum of the number of antenna ports of the N channel measurement signal resources.

[0208] In one possible design, N is less than K, and the second indication information includes: indexes of N channel measurement signal resources among K channel measurement signal resources, and indication information used to indicate aggregated measurement CSI.

[0209] In one possible design, the second indication information is information for enabling feedback of aggregated CSI, and the apparatus further includes: a sending module for sending aggregated CSI to the network device according to the second indication information.

[0210] In one possible design, the processing module is specifically used to calculate the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the receiving antennas of the terminal device, precoding measured by the terminal device, interference covariance matrix and noise variance.

[0211] In a possible design, the configuration information also includes: a third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used for the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used for other devices to measure CSI.

[0212] In one possible design, the third indication information includes a time unit offset parameter.

[0213] In one possible design, the third indication information includes: one or more time units, and a time unit offset parameter corresponding to each time unit.

[0214] In one possible design, the third indication information includes: indication information used to indicate periodic measurement.

[0215] In one possible design, the receiving module is further used to receive fourth indication information from the network device, where the fourth indication information is used to activate or deactivate aggregate measurement.

[0216] In one possible design, a receiving module is used to receive fifth indication information from a network device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

[0217] In one possible design, the sending module is also used to send CSI corresponding to one or more channel measurement signal resources among N channel measurement signal resources to the network device.

[0218] The beneficial effects of the embodiments of the present application can be referred to the description of the method embodiments corresponding to the terminal device, and will not be repeated here.

[0219] Reference Fig.11, showing a schematic diagram of the structure of a device for measuring channel state information in an embodiment of the present application. The device for measuring channel state information in an embodiment of the present application includes a processing module 1101 and a sending module 1102. Among them, the processing module is used to generate configuration information, and the configuration information includes first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI based on N channel measurement signal resources; N is less than or equal to K; the sending module is used to send the configuration information to the terminal device.

[0220] In one possible design, N is less than K, and the second indication information includes: indexes of N channel measurement signal resources among K channel measurement signal resources, and indication information used to indicate aggregated measurement CSI.

[0221] In one possible design, the second indication information is information for enabling feedback of aggregated CSI, and the apparatus further includes: a receiving module for receiving aggregated CSI from a terminal device; the aggregated CSI is the CSI of M antenna ports, where M is the sum of the number of antenna ports of N channel measurement signal resources.

[0222] In a possible design, the configuration information also includes: a third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used for the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used for other devices to measure CSI.

[0223] In one possible design, the third indication information includes a time unit offset parameter.

[0224] In one possible design, the third indication information includes: one or more time units, and a time unit offset parameter corresponding to each time unit.

[0225] In one possible design, the third indication information includes: used to indicate that channel measurement signal resources within multiple periods are aggregated for measurement.

[0226] In one possible design, the apparatus further includes: the network device shuts down the radio frequency channel that does not send orthogonal frequency division multiplexing OFDM symbols.

[0227] In a possible design, the sending module is also used to send fourth indication information to the terminal device, and the fourth indication information is used to activate or deactivate aggregate measurement.

[0228] In one possible design, the sending module is also used to send fifth indication information to the terminal device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

[0229] In one possible design, a receiving module is used to receive CSI corresponding to one or more multi-channel measurement signal resources among N channel measurement signal resources.

[0230] The beneficial effects of the embodiments of the present application can be referred to the description of the method embodiments corresponding to the network device, which will not be repeated here.

[0231] Fig.12 This is a schematic diagram of the hardware structure of the communication device provided in the embodiment of the present application. Fig.12 The communication device 12 includes: a memory 121, a processor 122 and a communication interface 123, wherein the memory 121, the processor 122 and the communication interface 123 can communicate; illustratively, the memory 121, the processor 122 and the communication interface 123 can communicate via a communication bus 124, the memory 121 is used to store a computer program, and the processor 122 executes the computer program to implement the above Figure 4 or Figure 7 The method shown in the illustrated embodiment.

[0232] Optionally, the communication interface 123 may also include a transmitter and / or a receiver.

[0233] Optionally, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

[0234] The present application provides a computer-readable storage medium for storing a computer program. Figure 4 or Figure 7 The method shown in the illustrated embodiment.

[0235] The present application also provides a communication system, including: Fig.10 The channel state information measuring device and Fig.11 The device for measuring the channel state information.

[0236] The embodiment of the present application also provides a system chip, which is used to support the communication device to implement the functions shown in the embodiment of the present application (for example, the terminal device receives configuration information from the network device, the configuration information includes first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI according to N channel measurement signal resources; N is less than or equal to K; the terminal device measures the N channel measurement signal resources according to the configuration information, and calculates the aggregated CSI according to the N measurement results; the aggregated CSI is the CSI of M antenna ports, M is the sum of the number of antenna ports of the N channel measurement signal resources, etc.), the chip is specifically used for a chip system, and the chip system can be composed of a chip, or it can include a chip and other discrete devices. When the chip in the first device implements the above method, the chip includes a processing unit, and further, the chip can also include a communication unit, the processing unit can be, for example, a processor, and when the chip includes a communication unit, the communication unit can be, for example, an input / output interface, a pin or a circuit. The processing unit performs all or part of the actions performed by the various processing modules in the embodiments of the present application, and the communication unit can perform corresponding receiving or sending actions, for example, receiving configuration signaling sent by a network device, etc. In another specific embodiment, the processing module of the receiving device in the embodiments of the present application can be a processing unit of a chip, and the receiving module or sending module of the control device is a communication unit of the chip.

[0237] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0238] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0239] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

Claims

1. A method for measuring channel state information, characterized in that: include: The terminal device receives configuration information from the network device, where the configuration information includes first indication information and second indication information; The first indication information is used to indicate K channel measurement signal resources, where K is greater than or equal to 2; the second indication information is used to indicate that the terminal device measures the aggregated CSI according to N channel measurement signal resources, where N is less than or equal to K; The terminal device measures the N channel measurement signal resources according to the configuration information, and calculates the aggregated CSI according to the N measurement results; the aggregated CSI is the CSI of M antenna ports, where M is the sum of the number of antenna ports of the N channel measurement signal resources; The terminal device calculates and obtains the aggregated CSI according to the N measurement results, including: The terminal device calculates the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the receiving antennas of the terminal device, precoding measured by the terminal device, interference covariance matrix, and variance of noise.

2. The method according to claim 1, characterized in that The N is smaller than the K, and the second indication information includes: indexes of N channel measurement signal resources among the K channel measurement signal resources, and indication information used to indicate aggregate measurement CSI.

3. The method according to claim 1, characterized in that The N is equal to the K, the second indication information is information enabling feedback of the aggregated CSI, and the method further includes: The terminal device sends the aggregated CSI to the network device according to the second indication information.

4. The method according to any one of claims 1 to 3, characterized in that: The configuration information also includes: third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used by the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used by other devices to measure CSI.

5. The method according to any one of claims 1 to 3, characterized in that: Also includes: The terminal device receives fourth indication information from the network device, where the fourth indication information is used to activate or deactivate aggregate measurement.

6. The method according to any one of claims 1 to 3, characterized in that: Also includes: The terminal device receives fifth indication information from the network device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

7. A method for measuring channel state information, characterized in that: include: The network device generates configuration information, the configuration information including first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: indicate the terminal device to measure the aggregated CSI according to N channel measurement signal resources; N is less than or equal to K; The network device sends the configuration information to the terminal device; The terminal device calculates and obtains the aggregated CSI according to the N measurement results, including: The terminal device calculates the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the receiving antennas of the terminal device, precoding measured by the terminal device, interference covariance matrix, and variance of noise.

8. The method according to claim 7, characterized in that The N is smaller than the K, and the second indication information includes: indexes of N channel measurement signal resources among the K channel measurement signal resources, and indication information used to indicate aggregate measurement CSI.

9. The method according to claim 7, characterized in that: The N is equal to the K, the second indication information is information enabling feedback of the aggregated CSI, and the method further includes: The network device receives aggregated CSI from the terminal device; the aggregated CSI is the CSI of M antenna ports, where M is the sum of the number of antenna ports of the N channel measurement signal resources.

10. The method according to any one of claims 7 to 9, characterized in that: The configuration information also includes: third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used by the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used by other devices to measure CSI.

11. The method according to any one of claims 7 to 9, characterized in that: Also includes: The network device sends fourth indication information to the terminal device, where the fourth indication information is used to activate or deactivate aggregate measurement.

12. The method according to any one of claims 7 to 9, characterized in that: Also includes: The network device sends fifth indication information to the terminal device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

13. A device for measuring channel state information, characterized in that: Applied to terminal equipment, including: A receiving module, configured to receive configuration information from a network device, the configuration information comprising first indication information and second indication information; the first indication information is used to indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to indicate the terminal device to measure the aggregated CSI according to N channel measurement signal resources, N is less than or equal to K; A processing module, configured to measure the N channel measurement signal resources according to the configuration information, and calculate an aggregated CSI according to the N measurement results; the aggregated CSI is the CSI of M antenna ports, where M is the sum of the number of antenna ports of the N channel measurement signal resources; The processing module is specifically used to instruct the terminal device to calculate the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the receiving antennas of the terminal device, precoding measured by the terminal device, interference covariance matrix and noise variance.

14. The device according to claim 13, characterized in that The N is smaller than the K, and the second indication information includes: indexes of N channel measurement signal resources among the K channel measurement signal resources, and indication information used to indicate aggregate measurement CSI.

15. The device according to claim 13, characterized in that The N is equal to the K, the second indication information is information enabling feedback of the aggregated CSI, and the device further includes: A sending module is used to send the aggregated CSI to the network device according to the second indication information.

16. The device according to any one of claims 13 to 15, characterized in that: The configuration information also includes: third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used by the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used by other devices to measure CSI.

17. The device according to any one of claims 13 to 15, characterized in that: The receiving module is further used to receive fourth indication information from the network device, where the fourth indication information is used to activate or deactivate aggregate measurement.

18. The device according to any one of claims 13 to 15, characterized in that: Also includes: The receiving module is used to receive fifth indication information from the network device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

19. A device for measuring channel state information, characterized in that: Applied to network equipment, including: A processing module, configured to generate configuration information, the configuration information including first indication information and second indication information; the first indication information is used to: indicate K channel measurement signal resources, K is greater than or equal to 2; the second indication information is used to: instruct the terminal device to measure the aggregated CSI according to N channel measurement signal resources; N is less than or equal to K; A sending module, used for sending the configuration information to the terminal device; The processing module is specifically used to calculate the aggregated CSI using the following information: channels corresponding to N multi-antenna port resources, weight coefficients on the receiving antennas of the terminal device, precoding measured by the terminal device, interference covariance matrix and noise variance.

20. The device according to claim 19, characterized in that The N is smaller than the K, and the second indication information includes: indexes of N channel measurement signal resources among the K channel measurement signal resources, and indication information used to indicate aggregate measurement CSI.

21. The device according to claim 19, characterized in that The N is equal to the K, the second indication information is information enabling feedback of the aggregated CSI, and the device further includes: A receiving module is used to receive aggregated CSI from the terminal device; the aggregated CSI is the CSI of M antenna ports, and M is the sum of the number of antenna ports of the N channel measurement signal resources.

22. The device according to any one of claims 19 to 21, characterized in that The configuration information also includes: third indication information, used to instruct the terminal device to measure the aggregated CSI in multiple time units; wherein part of the resources in the multiple time units are used by the terminal device to measure the aggregated CSI, and the remaining resources in the multiple time units are used by other devices to measure CSI.

23. The device according to any one of claims 19 to 21, characterized in that: The sending module is further used to send fourth indication information to the terminal device, where the fourth indication information is used to activate or deactivate aggregate measurement.

24. The device according to any one of claims 19 to 21, characterized in that Also includes: The sending module is further used to send fifth indication information to the terminal device, where the fifth indication information is used to activate or deactivate N1 channel measurement signal resources for aggregate measurement, where N1 is less than or equal to N.

25. A communication device, characterized in that: It comprises a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor; the processor is used to run the code instructions to execute the method according to any one of claims 1 to 6, or to execute the method according to any one of claims 7 to 12.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program is used to implement the method according to any one of claims 1 to 6, or to implement the method according to any one of claims 7 to 12.

27. A communication system, characterized in that: It comprises the device for measuring the channel state information as described in any one of claims 13-18, and the device for measuring the channel state information as described in any one of claims 19-24.

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