Channel state information reporting method, terminal and network side equipment

Abstract

The invention discloses a channel state information reporting method, a terminal and network side equipment, and belongs to the technical field of wireless communication, and the channel state information reporting method comprises the steps that the terminal obtains CSI, at least one piece of port indication information is associated with the CSI, and the terminal sends the port indication information to the terminal; the at least one piece of port indication information is used for indicating a reference signal port selected by the terminal from a reference signal port set; and the terminal reports a first CSI (Channel State Information) report, and the first CSI report comprises the CSI.

Description

Technical Field

[0001] The present application belongs to the field of wireless communication technology, and specifically relates to a method for reporting channel state information, a terminal, and a network-side device. Background Art

[0002] The channel state information (CSI) architecture can be divided into downlink CSI and uplink CSI, wherein the downlink CSI architecture includes a downlink physical channel and a downlink reference signal; the uplink CSI architecture includes an uplink physical channel and an uplink reference signal.

[0003] The downlink physical channel is usually used to transmit data, and the downlink reference signal is usually used to perform channel estimation to obtain downlink channel state information (CSI). The uplink physical channel is usually used to transmit uplink data, and the uplink reference signal is usually used to perform channel estimation to obtain uplink channel state information (CSI).

[0004] Typically, the terminal may determine through higher-layer signaling or default rules that a CSI report may include one of: 'none', 'cri-ri-pmi-cqi', 'cri-RI-i1', 'cri-RI-CQI', 'cri-RSRP', 'cri-SINR', 'ssb-Index-RSRP', 'ssb-Index-SINR' or 'cri-RI-LI-PMI-CQI'.

[0005] If the terminal is configured with a CSI report configuration (CSI-ReportConfig) and the upper layer parameter report quantity (reportQuantity) is set to "none", the terminal will not report anything for CSI-ReportConfig.

[0006] If the reportQuantity field in the high-level parameter CSI-ReportConfig is set to 'cri-RI-CQI', the terminal assumes that the precoding matrix indicator (PMI) is a unit matrix and only needs to report one or more of the CSI reference signal (CSI Reference Signal, CSI-RS) resource indication (CSI-RS Resource Indicator, CRI), rank indication (Rank indicator, RI) and channel quality indicator (Channel quality indicator, CQI), without reporting PMI.

[0007] However, in the related art, when reporting a CSI report, the terminal cannot select the port indication information associated with the CSI, so that the network side device cannot know the reference signal port selected by the terminal, thereby affecting the transmission efficiency between the terminal and the network side device. Summary of the invention

[0008] The embodiments of the present application provide a channel state information reporting method, a terminal, and a network-side device, which can solve the problem that the terminal cannot select CSI-associated port indication information when reporting a CSI report.

[0009] In a first aspect, a method for reporting channel state information is provided, including: a terminal obtains CSI, wherein the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; the terminal reports a first CSI report, wherein the first CSI report includes the CSI.

[0010] In a second aspect, a method for acquiring channel state information is provided, including: a network side device receives a first CSI report reported by a terminal, wherein the first CSI report includes CSI, and at least one port indication information is associated with the CSI, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set.

[0011] According to a third aspect, a channel state information reporting device is provided, comprising: a first acquisition module, used to acquire channel state information CSI, wherein the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; and a reporting module, used to report a first CSI report, wherein the first CSI report includes the CSI.

[0012] In a fourth aspect, a device for acquiring channel state information is provided, including: a transceiver module, used to receive a first CSI report reported by a terminal, wherein the first CSI report includes CSI, and at least one port indication information is associated with the CSI, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; a second acquisition module, used to acquire the CSI included in the first CSI report.

[0013] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0014] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the first aspect, and the communication interface is used to couple with the processor.

[0015] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0016] In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the second aspect, and the communication interface is used to couple with the processor.

[0017] In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0018] In the tenth aspect, a channel state information acquisition system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0019] In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0020] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method for reporting channel state information as described in the first aspect, or to implement the steps of the method for obtaining the channel state information report as described in the second aspect.

[0021] In an embodiment of the present application, the terminal can obtain CSI associated with at least one port indication information, where the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set, and include the CSI in a first CSI report and report it to a network side device, so that the network side device obtains the CSI included in the first report, and further determines the reference signal port selected by the terminal through the CSI, and then can perform data transmission with the terminal based on the reference signal port selected by the terminal, thereby improving data transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A block diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0023] Figure 2 A schematic diagram showing a flow chart of a method for reporting information status information provided by an embodiment of the present application;

[0024] Figure 3 A schematic diagram showing a flow chart of a method for obtaining information status information provided by an embodiment of the present application;

[0025] Figure 4 A schematic diagram showing a structure of a device for reporting information status information provided by an embodiment of the present application;

[0026] Figure 5 A schematic diagram showing a structure of a device for acquiring information status information provided by an embodiment of the present application;

[0027] Figure 6 A schematic diagram showing the structure of a communication device provided in an embodiment of the present application is shown;

[0028] Figure 7 A schematic diagram showing the hardware structure of a terminal provided in an embodiment of the present application is shown;

[0029] Figure 8 A schematic diagram of the hardware structure of a network side device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0031] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0032] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0033] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0034] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0035] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function (Policy Control Function, PCF), policy and charging rules function unit (Policy and Charging Rules Function, PCRF), edge application service discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data storage (Unified Data Repository, UDR), home user server (Home Subscriber Server, HSS), centralized network configuration (CNC), network storage function (Network Repository Function, NRF), network exposure function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0036] In order to better understand the technical solution provided by this application, the technology involved in this application is first introduced.

[0037] 1. CSI Architecture

[0038] Generally, the CSI architecture can be divided into two parts: downlink CSI and uplink CSI. Downlink CSI architecture: includes downlink physical channels and downlink reference signals; uplink CSI architecture: includes uplink physical channels and uplink reference signals.

[0039] The downlink physical channel is usually used to transmit data, and the downlink reference signal is usually used to perform channel estimation to obtain downlink channel state information (CSI). The uplink physical channel is usually used to transmit uplink data, and the uplink reference signal is usually used to perform channel estimation to obtain uplink channel state information (CSI).

[0040] In 5G systems, CSI is mainly used in Adaptive Beamforming and MIMO (Multiple Input Multiple Output) technologies to improve wireless transmission bandwidth and reliability.

[0041] In general, the 5G CSI architecture is a very important technology in the 5G communication system, and plays an important role in improving wireless transmission bandwidth and reliability and interference coordination.

[0042] 2. Contents of CSI Report

[0043] Typically, the terminal may determine through higher-layer signaling or default rules that a CSI report may include one of: 'none', 'cri-ri-pmi-cqi', 'cri-RI-i1', 'cri-RI-CQI', 'cri-RSRP', 'cri-SINR', 'ssb-Index-RSRP', 'ssb-Index-SINR' or 'cri-RI-LI-PMI-CQI'.

[0044] If the terminal is configured with a CSI report configuration (CSI-ReportConfig), and the upper layer parameter reportQuantity in the CSI report configuration is set to "none", the terminal will not report anything for the CSI-ReportConfig.

[0045] If the reportQuantity field in the high-level parameter CSI-ReportConfig is set to 'cri-RI-CQI', the terminal assumes that the precoding matrix indicator (PMI is a unit matrix) only needs to report the CSI reference signal (CSI Reference Signal, CSI-RS) resource indication (CSI-RS Resource Indicator, CRI), rank indication (Rank indicator, RI) and channel quality indicator (Channel quality indicator, CQI), without reporting PMI.

[0046] Furthermore, if the CSI-ReportConfig configured by the terminal contains the high-level parameter non-PMI-PortIndication, and non-PMI-PortIndication contains a port indication sequence in, It is the CSI-RS port indication of rank v, R∈{1,2,…,P} and P∈{1,2,4,8} represent the port number of CSI-RS resources. At this time, the UE only reports RI corresponding to the signaling PortIndexFor8Ranks.

[0047] Furthermore, if the terminal does not configure the high-level parameter non-PMI-PortIndication, the UE assumes that the port indication of each CSI-RS resource is That is, rank1 corresponds to port0, rank2 corresponds to port0 and port1, and so on, rank v-1 corresponds to port0,…,port v-1, where P∈{1,2,4,8} is the number of ports of the CSI-RS resource.

[0048] If PMI exists, the PMI indication can usually be divided into two large feedback amounts i1 and i2. As the number of subbands increases, the feedback amount may exceed 1000 bits at most. In addition, for coherent joint transmission (CJT) PMI, when the high-level signaling codebook mode (codebookMode) is configured as mode1, the feedback amount i1 additionally includes the feedback amount i2. 1,9 Used to indicate the frequency domain basis vector offset between multiple TRPs of CJT.

[0049] For the Type 2 series CSI reports carried on the Physical Uplink Shared Channel (PUSCH), they are usually divided into two parts, CSI report part 1 and CSI report part 2. Each part is independently encoded, and the size of CSI report part 2 can be determined by CSI report part 1.

[0050] 3. CSI acquisition

[0051] The network side device associates a reference signal resource configuration (CSI-ResourceConfig) for channel measurement, a reference signal resource configuration for interference measurement associated with a CSI-IM (CSI interference measurement) resource, or a reference signal resource configuration for interference measurement associated with an NZP-CSI RS (non-zero power CSI-RS) resource for each CSI report configuration (CSI-ReportConfig). The terminal obtains the corresponding channel information by measuring the reference resources associated with these resource configurations. Currently, the corresponding channel information can usually be considered as baseband digital precoding matrix information and baseband modulation mode recommendation information. Further, according to the codebook configuration information and report content associated with the CSI report configuration, the corresponding CSI information is obtained, and based on the uplink channel feedback.

[0052] However, in the related art, when the terminal reports the CSI report, if it wants to achieve more accurate CSI feedback, it needs to perform more complex PMI calculations, and the PMI feedback overhead is also large. If it is desired to further reduce the PMI feedback overhead, the terminal can feedback a broadband rank indication information to indicate the port selection of the terminal. At this time, the accuracy of the CSI is significantly reduced, and the selection of the precoding matrix for the network to send CSI-RS is greatly restricted, which is not conducive to reducing network overhead, and further affects the transmission efficiency between the terminal and the network side device. To address this problem, an embodiment of the present application provides a channel state information reporting scheme.

[0053] The following is a detailed description of the channel state information reporting scheme provided by the embodiment of the present application through some embodiments and their application scenarios in combination with the accompanying drawings.

[0054] Figure 2 A flow chart of a method for reporting channel state information in an embodiment of the present application is shown. The method 200 can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal. Figure 2 As shown, the method may include the following steps.

[0055] S210: The terminal obtains CSI, wherein the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set.

[0056] In a specific application, the network side device associates a reference signal resource configuration signaling (e.g., CSI-ResourceConfig) for channel measurement, and a reference signal resource configuration signaling for interference measurement associated with a CSI interference measurement (CSI-IM) resource, or a reference signal resource configuration signaling for interference measurement associated with a non-zero power CSI-RS (NZP-CSI RS) resource for each CSI report configuration signaling (e.g., CSI-ResourceConfig). The terminal can obtain the corresponding channel information by measuring the reference resources associated with these resource configurations, and obtain the CSI based on the measurement results.

[0057] In an embodiment of the present application, during the process of acquiring CSI, the terminal may select at least once from the reference signal port set, and select at least one reference signal port each time. For example, according to the channel information obtained by measuring the reference resource associated in the reference signal resource configuration indicated by the network side device, the terminal determines the number of times to select the reference signal port from the reference signal port set according to the network side signaling, as well as the number of reference signal ports selected by the terminal each time or the reference signal port subset selected by the terminal each time. The reference signal port set may be composed of ports for measuring reference signals of all channels in the reference signal resource configuration, or may be composed of ports for measuring reference signals of some channels in the reference signal resource configuration. If it is composed of ports of multiple reference signals, the port numbering may be numbered across reference signals, that is, the ports of multiple reference signals are numbered together.

[0058] The terminal can obtain CSI based on at least one selection and at least one reference signal port selected each time. The CSI may include at least one port indication information for indicating at least one reference signal port selected each time. Alternatively, the CSI may not include at least one port indication information, but other information in the CSI (for example, RI information) indirectly indicates the at least one port indication information.

[0059] S212. The terminal reports a first CSI report, where the first CSI report includes the above-mentioned CSI.

[0060] Through the above technical solution provided by the embodiment of the present application, the terminal can obtain CSI associated with at least one port indication information, and the at least one port indication information is used to indicate the reference signal port selected by the terminal at least once from the reference signal port set, and include the CSI in the first CSI report and report it to the network side device, so that the network side device obtains the CSI included in the first report, and further determines the reference signal port selected by the terminal through the CSI, and then can perform data transmission with the terminal based on the reference signal port selected by the terminal, thereby improving data transmission efficiency. At the same time, for multiple selections, the network side device can flexibly configure the precoding of the reference signal according to the actual scheduling situation or channel situation, thereby reducing the overhead on the network side.

[0061] In an optional implementation, CSI associated with at least one port indication information may include: when the CSI includes PMI, the PMI included in the CSI is only associated with the at least one port indication information. In this optional implementation, the terminal can obtain PMI, but the obtained PMI is only associated with at least one port indication information. Therefore, the terminal only selects the reference signal port in the process of obtaining PMI. In the related art, when PMI exists in CSI, PMI includes two larger feedback amounts i1 and i2. As the number of subbands increases, the feedback amount of PMI may exceed 1000 bits at most. For CJT's PMI, when the high-level signaling codebookMode is configured as mode1, the feedback amount i1 additionally includes the feedback amount i2. 1,9 It is used to indicate the frequency domain basis vector offset between multiple TRPs of CJT, and the feedback amount of PMI is larger. Therefore, adopting this optional implementation method can effectively reduce the complexity of PMI acquisition, so it is more suitable for coefficients of large bandwidth and large antenna.

[0062] In another optional implementation, CSI associated with at least one port indication information may include: when the CSI does not include PMI, the CSI is associated with at least 2 port indication information. In this optional implementation, the terminal is prevented from obtaining PMI, that is, the CSI is not associated with PMI. At this time, at least 2 port indication information may be associated with the CSI, and each port indication information is used to indicate the reference signal port selected by the terminal from the reference signal port set. Optionally, the port indication information may be RI indication information, and the reference signal port selected by the terminal from the reference signal port set is obtained through the indication of RI. Optionally, an RI indication information may include 2 parts, the first part is used to indicate a reference signal, and the second part is used to indicate the reference signal port information selected in the reference signal indicated by the first part.

[0063] In the above optional implementation, optionally, the at least two port indication information satisfies at least one of the following:

[0064] (1) Resource blocks (RBs) associated with different port indication information are not completely the same; that is, among at least two port indication information, at least two of the port indication information are associated with different resource blocks. In this way, the granularity of the reported port indication information can be set to at least one RB, thereby achieving more flexible port selection and avoiding the situation where the network side device is restricted in selecting the precoding matrix for sending CSI-RS due to the large granularity of the terminal port indication information, resulting in increased configuration overhead and reduced flexibility.

[0065] (2) The subbands associated with different port indication information are not completely the same; that is, among at least two port indication information, at least two of the port indication information are associated with different subbands. In this way, the granularity of the reported port indication information can be set to at least one subband, thereby achieving more flexible subband-level port selection and avoiding restrictions on the network side device's selection of the precoding matrix for sending the CSI-RS.

[0066] In the embodiment of the present application, a subband may be a block of time-frequency resource positions, or a subband may be a set of resource elements (REs), or a subband may be a set of RBs. For example, the size of a subband or the number of subbands included in the measured time-frequency resources and the time-frequency resources associated with each subband may be determined by protocol agreement or network signaling. Different port indication information may be associated with different subbands, and different port indication information may be associated with different time-frequency resource positions.

[0067] In the embodiment of the present application, the subband may be a subband configuration dedicated to the port indication information, or may be a subband configuration shared by the port indication information and information such as PMI or CQI.

[0068] (3) The reference signals associated with different port indication information are not completely the same. That is, among at least two port indication information, at least two of the port indication information are associated with different reference signals, so that the configuration of user-specific reference signals can be avoided as much as possible, thereby effectively reducing the reference signal overhead.

[0069] Using the above optional implementation method, since the CSI includes at least 2 port indication information, each port indication information can be associated with different bandwidth information (for example, RB or RB set or subband or subband set) or associated with different reference signals. In this way, the accuracy of CSI acquisition can be improved, and the flexibility of the network to send reference signals or the flexibility of the network to set the precoding matrix associated with the reference signal can be improved. Further, the configuration of user-specific reference signals can be avoided as much as possible, thereby effectively reducing the overhead of the reference signal.

[0070] In another optional implementation, when the CSI does not include PMI, the CSI may be associated with one port indication information, and the first CSI report may include the number of the port indication information (i.e., 1) or the network side device instructs the terminal to feedback one port indication information through high-level signaling. In this optional implementation, when the CSI is not associated with PMI, the CSI may be associated with one port indication information, and the number of the port indication information (1) may be what the terminal feeds back in the first CSI report, i.e., the terminal determines the number of port indication information, and the value of the number is greater than or equal to 1. It may also be configured by network high-level signaling, i.e., the network side device instructs the terminal to feed back greater than or equal to 1 port indication information through high-level signaling.

[0071] In the above optional implementation, when the CSI does not include PMI, one port indication information is associated with the CSI, and the port indication information is used to indicate the reference signal port selected by the terminal from the reference signal port set. With this optional implementation, one port indication information can be associated with the CSI obtained by the terminal. The number of the port indication information can be configured by the network high-level signaling, that is, there is a high-level signaling used to indicate the number of port indication information associated with the CSI, and further, this number can be configured to be 1. In this way, the flexibility of the network in obtaining CSI can be improved. Or the number of port indication information can be fed back or indicated by the terminal, that is, the terminal indicates the number of port indication information associated with the CSI to the network in the CSI report, and further, the number indicated by the terminal can be 1. In this way, the freedom of the terminal in obtaining CSI can be improved, and the overhead of CSI can also be reduced.

[0072] In another optional implementation, the CSI may be associated with at least one CQI, wherein one CQI is associated with one port indication information. Optionally, the one CQI may be simply understood as a CQI associated with one port indication information. Based on this simple understanding, the one CQI may be a CQI with a larger granularity (e.g., a broadband CQI, where the broadband may be understood as a broadband composed of multiple subbands), or may be a plurality of CQIs with smaller granularity (e.g., a subband CQI, where the subband is a resource definition with a smaller frequency domain granularity than the broadband), or may be a CQI with a larger granularity and a plurality of CQIs with a smaller granularity, or may be a CQI with a larger granularity and a plurality of CQI differential values.

[0073] In the above optional implementation, when the terminal obtains CSI, it can obtain the above CQI by using at least some of the reference signal ports in the above reference signal port set to perform interference measurement. In other words, it can be understood that at least some of the reference signal ports in the above reference signal port set are used as reference signal ports for interference measurement.

[0074] Optionally, for obtaining the above-mentioned CQI, the above-mentioned at least part of the reference signal ports may not include the reference signal ports associated with at least one port indication information associated with the above-mentioned CQI, wherein the at least part of the reference signal ports may include one of the following:

[0075] (1) all reference signal ports in the reference signal port set except the reference signal port associated with the port indication information;

[0076] (2) All reference signal ports in a port subset except the reference signal port associated with the port indication information, the port subset being a subset of the reference signal port set. Optionally, the port subset may be determined by a third high-level signaling, and one possible manner is: the network-side device may indicate a port subset to the terminal by means of a third high-level signaling, so as to prevent the terminal from measuring all reference signal ports in the reference signal port set except the reference signal port associated with the port indication information as interference. Another possible manner is: the network-side device may indicate a port subset size to the terminal by means of a third high-level signaling, and the terminal feeds back the selected port subset position or the ports included in the port subset.

[0077] For example, the network side device may indicate through the third high-layer signaling that the port subset is the first five ports. If the terminal selects ports 1 and 2, when the terminal calculates the CQI, it is assumed that ports 3 / 4 / 5 are reference signal ports for interference measurement.

[0078] For example, after obtaining the PMI or port indication information, the terminal may obtain at least one CQI associated with the CSI, wherein the CQI is associated with a port indication information, wherein during the CQI acquisition process, the terminal uses part of the reference signal ports in the reference signal port set for interference measurement. Optionally, during a CQI acquisition process, the terminal uses the reference signal port indicated by the port indication information associated with the CQI for channel measurement, and uses part or all of the reference signal ports other than the reference signal port indicated by the port indication information associated with the CQI for interference measurement. In this way, the CQI fed back by the terminal can be closer to the actual multi-user scheduling situation (the terminal assumes that part of the ports in the reference signal port set are used for transmission by other users), thereby improving the transmission success rate and transmission efficiency.

[0079] For example, one port indication information indicates 4 ports selected from 16 ports, and the partial ports used for interference measurement are the remaining 12 ports of the 16 ports;

[0080] For another example, a port indication information includes 2 parts, wherein the first part is used to indicate that a port subset includes 8 ports, and the second part indicates 4 ports selected from the 8 ports, then the partial ports used for interference measurement are the remaining 4 ports of the 8 ports;

[0081] For another example, a port indication information indicates 4 ports selected from 16 ports, and the network indicates the first port set for measuring interference to the terminal through high-level signaling, and the ports other than the selected 4 ports in the first port set are used by the terminal for interference measurement. In particular, the first port set may include all or part of the selected 4 ports or may not include the selected 4 ports.

[0082] Optionally, in an embodiment of the present application, the reference signal port set may be associated with one reference signal, or the reference signal port set may be associated with multiple reference signals. That is, all reference signal ports in the reference signal port set are associated with the same reference signal. Alternatively, some ports in the reference signal port set are associated with different reference signals.

[0083] In an optional implementation, each of the above-mentioned port indication information may be associated with a combination number, and the combination number is used to determine the reference signal port selected by the terminal. That is, the terminal may indicate the selected reference signal port information to the network side device through a combination number, or indicate that the selected reference signal port is located at a position of a reference signal port set, or indicate that the selected reference signal port is located at a position of a reference signal port subset, and the subset may be composed of multiple reference signal ports indicated by the network through high-layer signaling.

[0084] In the above optional implementation, optionally, the number of reference signal ports associated with the above port indication information may be indicated by high-layer signaling of a network side device. Further optionally, when the first CSI report includes only one part, the above port indication information is located in the part, or, when the first CSI report includes a first part (Part1) and a second part (Part2), the above port indication information is located in Part1.

[0085] Alternatively, in the above optional implementation, optionally, the first CSI report may include a first part (Part 1) and a second part (Part 2), wherein Part 2 of the first CSI report includes the port indication information, and Part 1 of the first CSI report includes port quantity indication information, and the port quantity indication information is used to indicate the number of reference signal ports selected by the terminal, or the port quantity indication information is used to indicate the number of ports selected by the terminal associated with the port indication information. Through the port quantity indication information, the network side device can determine the size of Part 2 of the CSI report, further enabling the network side device to effectively demodulate Part 2 of the CSI report. Further optionally, the maximum number of ports indicated by the port quantity indication information can be configured by network high-level signaling.

[0086] Optionally, multiple port indication information may share one port quantity indication information, that is, multiple port indication information is associated with the same number of reference signal ports selected by the terminal. For example, all port indication information may share one port quantity indication information, all port indication information is associated with the same number of reference signal ports selected by the terminal, or some port indication information may share one port quantity indication information, and some port indication information is associated with the same number of ports selected by the terminal.

[0087] Or, optionally, each port indication information is associated with one port quantity indication information, that is, the CSI report Part 1 includes P port quantity indication information, and the CSI report Part 2 includes P port indication information.

[0088] Optionally, the number of port quantity indication information can be determined by first high-level signaling. For example, the first high-level signaling explicitly indicates the number of port quantity indication information fed back by the terminal, or the network side device implicitly indicates the number of port quantity indication information fed back by the terminal through the first high-level signaling.

[0089] In an optional implementation, each of the above-mentioned port indication information may be associated with two parts of content: content 1 and content 2, wherein content 1 is used to indicate or determine a reference signal port subset, and content 2 is used to indicate or determine the reference signal port selected by the terminal in the reference signal port subset. For example, each port indication information may include content 1 and content 2, or each port indication information may correspond to an indicator in a CSI report for indicating a reference signal port subset and an indicator for indicating a reference signal port selected by the terminal in the reference signal port subset, and the network side device obtains the port or port position indicated by the port indication information through the reference signal port subset corresponding to the port indication information and the reference signal port corresponding to the port indication information.

[0090] In the above optional implementation, for the port indication information, it can include two parts of content or associate two parts of content (content 1 and content 2), wherein content 1 (i.e., the first part of the content) is used to determine a reference signal port subset; content 2 (i.e., the second part of the content) is used to determine the reference signal port selected by the terminal in the port subset.

[0091] Optionally, the content 1 may be associated with a bit sequence or a combination number, and the content 2 may be associated with a bit sequence or a combination number. In this way, when there are many ports, the feedback overhead of the port indication information may be effectively reduced.

[0092] Furthermore, multiple port indication information can share the content 1, that is, multiple port indication information are associated with the same reference signal port subset. For multiple port indication information, the terminal only needs to feedback a shared content 1, and does not need to feedback a content 1 for each port indication information. In this way, the feedback overhead of the port indication information can be further reduced.

[0093] Optionally, for obtaining a reference signal port subset, the terminal configures the size of a reference signal port subset through network high-layer signaling, or the terminal determines the size of a reference signal port subset according to a protocol agreement, and according to the size, the terminal divides the reference signal port set into at least one reference signal subset. The one or each content 1 is used to indicate a subset of the at least one reference signal subset.

[0094] Or, optionally, the terminal divides the reference signal port set into at least one reference signal subset according to a protocol agreement and a size of the reference signal port set, and the one or each content 1 is used to indicate a subset of the at least one reference signal subset.

[0095] Alternatively, optionally, for obtaining a reference signal port subset, the terminal may configure the size of a reference signal port subset through network high-level signaling, or the terminal may determine the size of a reference signal port subset according to a protocol agreement. The content 1 is used to indicate a starting position, that is, the position of the first port of the reference signal port subset, and the reference signal port subset is a plurality of consecutive ports after the starting position. Therefore, the indication overhead of content 1 is related to the size of the reference signal port set minus the size of the reference signal port subset.

[0096] For example: a port indication information is associated with indication information for selecting 4 ports from 64 ports. If the indication is directly performed using the combination number, 20 bits are required. If there is a part 1 that first indicates 16 consecutive ports from the 64 ports, then at this time, only at least one port from the first 48 ports is required to indicate the position of the first port of the 16 consecutive ports, then part 1 requires ceil(log2(64-16))=6 bits. Further, there is a part 2 for indicating the 4 ports selected from the 16 consecutive ports, then part 2 requires 11 bits, which can save 3 bits compared to direct indication.

[0097] In an optional implementation, before S210, the method may further include: the terminal determines the bit width associated with each port indication information through at least one second high-layer signaling. In the case where each port indication information is associated with a first portion of content (i.e., the above-mentioned content 1) and a second portion of content (i.e., the above-mentioned content 2), the terminal may determine the bit width of the second portion of content associated with each of the port indication information through at least one high-layer signaling, or determine the bit width of the first portion of content associated with each of the port indication information. Through this optional implementation, the network side device can flexibly control the overhead of the port indication information to avoid useless port selection and measurement.

[0098] In the above optional implementation manner, optionally, the terminal determining the bit width associated with any one of the port indication information through at least one second high-layer signaling may include the following steps:

[0099] Step 11, the terminal obtains the second high-layer signaling, and determines a candidate port set through the second high-layer signaling, wherein all the port indication information is associated with the same candidate port set; wherein the ports in the candidate port set can be a subset of a port constituting set of reference signals configured for the network (i.e., the above-mentioned reference signal port set).

[0100] In step 12, the terminal determines the bit width associated with the port indication information based on the number of ports in the candidate port set, or determines the bit width of content 2 associated with the port indication information, or determines the bit width of content 1 associated with the port indication information.

[0101] Or, optionally, the terminal determining, through at least one second high-layer signaling, a bit width associated with any one of the port indication information may include the following steps:

[0102] Step 21, the terminal obtains the second high-level signaling, and determines a candidate port set through the second high-level signaling, wherein each of the port indication information is associated with a candidate port subset, and all the candidate port subsets constitute a candidate port set indicated by the second high-level signaling; wherein the ports in the candidate port set can be a subset of a port set of reference signals configured for the network (i.e., the above-mentioned reference signal port set).

[0103] Step 22: The terminal determines the bit width associated with each port indication information based on the number of ports in the candidate port subset associated with each port indication information, or determines the bit width of content 2 associated with each port indication information, or determines the bit width of content 1 associated with each port indication information.

[0104] Alternatively, optionally, the terminal determining the bit width associated with any one of the port indication information through at least one second high-layer signaling may include the following steps:

[0105] In step 31, the terminal obtains a plurality of the second high-layer signalings, and determines a plurality of candidate port sets through the plurality of the second high-layer signalings, wherein each of the port indication information is associated with a candidate port set; wherein the ports in the candidate port set may be a subset of a port constituting set of reference signals configured for the network (i.e., the reference signal port set mentioned above).

[0106] In step 32, the terminal determines the bit width associated with each port indication information based on the number of ports in the candidate port set associated with each port indication information, or determines the bit width of content 2 associated with each port indication information, or determines the bit width of content 1 associated with each port indication information.

[0107] In the above optional implementation, the network side device can configure the candidate port set through at least one second high-level signaling, one port indication information is associated with one candidate port set, and the bit width of the port indication information is related to the number of ports in the candidate port set. For example, the network side device can indicate the candidate ports of all port indication information through one second high-level signaling, or through multiple second high-level signalings, each second high-level signaling indicates a candidate port of port indication information. Thereby, the network side device can flexibly control the overhead of the port indication information and avoid useless port selection and measurement.

[0108] In an optional implementation, before S210, the method may further include: the terminal determines the quantity of the port indication information associated with the CSI according to a fourth higher layer signaling.

[0109] In the above optional implementation, the fourth high-level signaling may be a high-level signaling for configuring the number of port indication information associated in the CSI, or the fourth high-level signaling may also be a high-level signaling for configuring other information, and the terminal may determine the number of port indication information associated in the CSI according to the information configured by the high-level signaling. Optionally, the fourth high-level signaling is used to configure one of the following:

[0110] (1) Each port indicates the number of subbands associated with the information.

[0111] For example, the network side device configures the number N of subbands associated with each port indication information through the fourth high-level signaling, and the terminal obtains the number of port indication information according to N.

[0112] For example, the terminal assumes that within the CSI associated bandwidth, starting from the starting position of the bandwidth, one port indication information is associated with every N subbands; in particular, there may be a situation where the number of subbands associated with the bandwidth cannot be divided evenly by N, so there may be the first port indication information or the last port indication information, and the number of subbands associated with it may be less than N, or there may be the first port indication information and the last port indication information, and the number of subbands associated with it may be less than N.

[0113] (2) The number of RBs associated with each port indication information.

[0114] For example, the network side device configures the number N of RBs associated with each port indication information through the fourth high-level signaling, and the terminal obtains the number of port indication information according to N;

[0115] For example, the terminal assumes that within the CSI associated bandwidth, starting from the starting position of the bandwidth, every N RBs are associated with one port indication information; in particular, there may be a situation where the number of RBs associated with the bandwidth cannot be divided into N, so there may be the first port indication information or the last port indication information, and the number of RBs associated with it may be less than N, or there may be the first port indication information and the last port indication information, and the number of RBs associated with it may be less than N.

[0116] (3) The number of port indication information;

[0117] For example, the network side device configures the quantity M of the port indication information through the fourth high-level signaling, and obtains the quantity of the port indication information according to M.

[0118] For example: assuming that the total number of subbands or RBs in the CSI associated bandwidth is S, starting from the starting position of the bandwidth, one port indication information is associated with each ceil (S / M) subband or RB; in particular, there may be a situation where the number of subbands or RBs associated with the bandwidth cannot be divided by ceil (S / M), so it may be that for the first port indication information or the last port indication information, the number of subbands or RBs associated therewith may be less than ceil (S / M), or; for the first port indication information and the last port indication information, the number of subbands or RBs associated therewith may be less than ceil (S / M).

[0119] (4) Multiple subband indications, each of which is associated with a port indication information. The terminal may determine the number of port indication information associated in the CSI according to the number of the multiple subband indications. For example, the number of port indication information associated in the CSI is equal to the number of the multiple subband indications. A subband may be composed of at least one RB or RE.

[0120] (5) Multiple RB indications, each RB indication is associated with a port indication information. The terminal may determine the number of port indication information associated in the CSI according to the number of the multiple RB indications. For example, the number of port indication information associated in the CSI is equal to the number of the multiple RB indications.

[0121] Through the above optional implementation method, the network side device can flexibly indicate the number of port indication information associated with the CSI in combination with the actual scheduling situation of the network side device, thereby effectively reducing the CSI overhead or the complexity of the terminal obtaining the CSI.

[0122] In an optional implementation, before S212, the method may further include: the terminal sets the priority of the first CSI report, wherein the priority of the first CSI report is higher than the priority of the second CSI report, the second CSI report has the same time domain characteristics as the first CSI report, and the second CSI report includes at least one of the following: a CSI report of non-Layer 1 Reference Signal Received Power (L1-RSRP), a CSI report of non-Layer 1 Signal-to-Noise and Interference Ratio (L-SINR). For example, for the first CSI report and the second CSI report with the same time domain characteristics, the priority value associated with the first CSI report is less than the priority value associated with the second CSI report of non-L1-RSRP or the second CSI report of non-L1-SINR, wherein the CSI report with a smaller priority value has a higher priority and is processed first.

[0123] In the above implementation, when there are multiple CSI reports, each CSI report is associated with a priority value, and the CSI report with a smaller priority value has a higher priority and is processed first. For the first CSI report associated with the above CSI, for multiple CSI reports with the same time domain characteristics, the priority value associated with the first CSI report is smaller than the CSI report of non-L1-RSRP or L1-SINR.

[0124] For example, when both CSI reports are non-periodic CSI reports, if one of the CSI reports is a first CSI report and the other report is a second CSI report that is not L1-RSRP or L1-SINR or the first CSI report, the priority value associated with the first CSI report is smaller than that of the second CSI report. That is, the priority associated with the first CSI report is higher than that of the second CSI report.

[0125] An optional priority value calculation formula may be:

[0126] Pri CSI =2*N cells *M s *y+N cells *M s *k+M s *c+s

[0127] Among them, y=0 indicates aperiodic CSI reporting and being carried on PUSCH, y=1 indicates semi-persistent CSI reporting and being carried on PUSCH, y=2 indicates semi-persistent CSI reporting and being carried on PUCCH, and y=3 indicates periodic CSI reporting and being carried on PUCCH.

[0128] Here, k=0 indicates a CSI report carrying L1-RSRP or L1-SINR or a first CSI report, and k=1 indicates a second CSI report that does not carry L1-RSRP or L1-SINR and is not the first CSI report.

[0129] Where c represents the service cell number, N cells Value associated with standard higher layer signaling maxNrofServingCells.

[0130] Among them, s represents the high-level signaling reportConfigID, M s Indicates the value associated with the higher-level signaling maxNrofCSI-ReportConfigurations.

[0131] Another optional priority value calculation formula can be:

[0132] Pri CSI=3*N cells *M s *y+N cells *M s *k+M s *c+s

[0133] Among them, y=0 indicates aperiodic CSI reporting and being carried on PUSCH, y=1 indicates semi-persistent CSI reporting and being carried on PUSCH, y=2 indicates semi-persistent CSI reporting and being carried on PUCCH, and y=3 indicates periodic CSI reporting and being carried on PUCCH.

[0134] Here, k=0 indicates a CSI report carrying L1-RSRP or L1-SINR, k=1 indicates a first CSI report, and k=2 indicates a CSI report not carrying L1-RSRP or L1-SINR and not the first CSI report.

[0135] Where c represents the service cell number, N cells Value associated with standard higher layer signaling maxNrofServingCells.

[0136] Among them, s represents the high-level signaling reportConfigID, M s Indicates the value associated with the higher-level signaling maxNrofCSI-ReportConfigurations.

[0137] Another optional priority value calculation formula may be:

[0138] Pri CSI =3*N cells *M s *y+N cells *M s *k+M s *c+s

[0139] Among them, y=0 indicates aperiodic CSI reporting and being carried on PUSCH, y=1 indicates semi-persistent CSI reporting and being carried on PUSCH, y=2 indicates semi-persistent CSI reporting and being carried on PUCCH, and y=3 indicates periodic CSI reporting and being carried on PUCCH.

[0140] Here, k=0 indicates the first CSI report, k=1 indicates a CSI report carrying L1-RSRP or L1-SINR, and k=2 indicates a CSI report not carrying L1-RSRP or L1-SINR or a non-first CSI report.

[0141] Where c represents the service cell number, N cells Value associated with standard higher layer signaling maxNrofServingCells.

[0142] Among them, s represents the high-level signaling reportConfigID, M s Indicates the value associated with the higher-level signaling maxNrofCSI-ReportConfigurations.

[0143] Through the above optional implementation manner, when a conflict occurs in CSI reporting, it can be ensured that the first CSI report is reported first.

[0144] In an optional implementation, when the first CSI report meets a predetermined condition, the reporting time slot of the first CSI report is the same as or adjacent to the target time slot, wherein the target time slot is the time slot associated with the downlink control information (DCI) associated with the first CSI report. By adopting this optional implementation, the network side device can quickly obtain CSI information under certain predetermined conditions, which can effectively avoid the problem of CSI aging and improve transmission efficiency.

[0145] Optionally, the target time slot may be an uplink time slot or a downlink time slot. The DCI associated with the first CSI report may be a DCI for activating reporting of the first CSI report.

[0146] In the above optional implementation, optionally, the predetermined condition is related to at least one of the following:

[0147] (1) Number of candidate reference signal ports; for example, the predetermined condition may be: the number of candidate reference signal ports is less than or equal to a first value, where the first value may be an integer agreed upon by the protocol.

[0148] (2) The number of candidate reference signals; for example, the predetermined condition may be: the number of candidate reference signals is less than or equal to a second value, and the second value is an integer agreed upon in the protocol.

[0149] (3) The number of port indication information; for example, the predetermined condition may be: the number of port indication information is less than or equal to a third value, and the third value is an integer agreed upon in the protocol.

[0150] (4) The number of port quantity indication information; for example, the predetermined condition may be: the number of port quantity indication information is less than or equal to a third value, and the third value is an integer agreed upon by the protocol.

[0151] (5) The number of available CSI processing units (CPUs); for example, the predetermined condition may be: the number of available CSI processing units is greater than or equal to a fourth value, and the fourth value is an integer.

[0152] (6) Bandwidth associated with the CSI report; for example, the predetermined condition may be: the bandwidth associated with the CSI report is less than or equal to a fifth value, and the fifth value is a multiple of a frequency domain resource element (RE) or a frequency domain resource block (BR).

[0153] (7) A bandwidth associated with the candidate reference signal; for example, the predetermined condition may be that the bandwidth associated with the candidate reference signal is less than or equal to a sixth value, where the sixth value is a multiple of a frequency domain resource element (RE) or a frequency domain resource block (BR).

[0154] (8) The subcarrier spacing of the PDCCH associated with the DCI associated with the CSI report; for example, the predetermined condition may be: the subcarrier spacing of the PDCCH associated with the DCI associated with the CSI report is less than or equal to the seventh value, and the seventh value is a multiple of the unit subcarrier spacing (for example: 15KHz).

[0155] (9) Subcarrier spacing of PUCCH or PUSCH associated with the CSI report; for example, the predetermined condition may be: the subcarrier spacing of PUCCH or PUSCH associated with the CSI report is less than or equal to an eighth value, and the eighth value is a multiple of the unit subcarrier spacing.

[0156] (10) Minimum subcarrier spacing of a reference signal associated with a CSI report; for example, the predetermined condition may be that the minimum subcarrier spacing of a reference signal (CSI-RS) associated with a CSI report is less than or equal to a ninth value, and the ninth value is a multiple of a unit subcarrier spacing.

[0157] In the above technical solution provided in the embodiment of the present application, by simplifying the PMI calculation or not including the PMI calculation, a flexible and simple CSI acquisition method is provided, through which the network side device can configure the CSI-RS and set the precoding matrix of the CSI-RS more flexibly, thereby avoiding user-specific CSI-RS as much as possible and saving CSI-RS overhead. Further, some port indication methods are provided, which can effectively reduce feedback overhead.

[0158] Based on the same technical concept, an embodiment of the present application also provides a method for acquiring channel state information.

[0159] Figure 3 A flow chart of a method for acquiring channel state information provided in an embodiment of the present application is shown, and the method 300 can be executed by a network side device. In other words, the method can be executed by software or hardware installed on the network side device. When it is necessary to explain, the following embodiment only explains the operation of the network side device. For other matters not covered, please refer to the above description of the method 200.

[0160] S310, a network-side device receives a first CSI report reported by a terminal, wherein the first CSI report includes CSI, and the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set.

[0161] In a specific application, the terminal may report the first CSI report to the network side device according to various implementation modes of the method 200. For details, please refer to the relevant description in the method 200, which will not be repeated here.

[0162] In an optional implementation manner, the CSI associated with at least one port indication information may include one of the following:

[0163] (1) When the CSI includes a PMI, the PMI is associated only with the at least one port indication information;

[0164] (2) When the CSI does not include the PMI, the CSI is associated with at least two port indication information;

[0165] (3) When the CSI does not include the PMI, the CSI is associated with one port indication information, the first CSI report includes the number of the one port indication information, or the network side device instructs the terminal to feedback one port indication information;

[0166] (4) The CSI is associated with at least one channel quality indication CQI, wherein one CQI is associated with one port indication information.

[0167] Optionally, the at least two port indication information satisfies at least one of the following:

[0168] (1) The RBs associated with different port indication information are not exactly the same;

[0169] (2) The subbands associated with different port indication information are not exactly the same;

[0170] (3) The reference signals associated with different port indication information are not exactly the same.

[0171] In an embodiment of the present application, the reference signal port set is associated with one reference signal, or the reference signal port set is associated with multiple reference signals.

[0172] In an optional implementation manner, each of the port indication information may be associated with a combination number, and the combination number is used to determine the reference signal port selected by the terminal.

[0173] In the above implementation, optionally, part 2 of the first CSI report includes the port indication information, and part 1 of the first CSI report includes port quantity indication information, and the port quantity indication information is used to indicate the number of reference signal ports selected by the terminal.

[0174] In the above implementation, optionally, a plurality of the port indication information share one port quantity indication information, or each port indication information corresponds to one port quantity indication information.

[0175] In the above implementation, optionally, before the network side device receives the first CSI report reported by the terminal, the method further includes:

[0176] The network side device indicates the quantity of the port quantity indication information in the first CSI report through a first high-layer signaling.

[0177] In an optional implementation, each of the port indication information is associated with a first portion of content and a second portion of content, wherein the first portion of content is used to determine a reference signal port subset, and the second portion of content is used to determine a reference signal port selected by the terminal in the reference signal port subset.

[0178] In the above optional implementation manner, optionally, a plurality of the port indication information share the first part of content.

[0179] In an optional implementation, before the network side device receives the first CSI report reported by the terminal, the method further includes:

[0180] The network side device indicates to the terminal, through at least one second high-layer signaling, a bit width associated with each of the port indication information.

[0181] In the above optional implementation manner, optionally, the network side device indicates to the terminal, through at least one second high-layer signaling, a bit width associated with each port indication information, including at least one of the following:

[0182] (1) The network side device sends a second high-layer signaling, wherein the second high-layer signaling is used to determine a candidate port set, all the port indication information is associated with the same candidate port set, and the number of ports in the candidate port set indicates the bit width associated with the port indication information;

[0183] (2) The network side device sends a second high-layer signaling, wherein the second high-layer signaling is used to determine a candidate port set, each of the port indication information is associated with a candidate port subset, all of the candidate port subsets constitute a candidate port set indicated by the second high-layer signaling, and the number of ports in the candidate port subset associated with each of the port indication information indicates a bit width associated with each of the port indication information;

[0184] (3) The network side device sends multiple second high-layer signalings, wherein the multiple second high-layer signalings are used to determine multiple candidate port sets, wherein each port indication information is associated with a candidate port set, and the bit width associated with each port indication information is determined by the number of ports in the candidate port set associated with each port indication information.

[0185] In an optional implementation manner, the CQI is obtained by the terminal by performing interference measurement using at least some of the reference signal ports in the reference signal port set, and the at least some of the reference signal ports include one of the following:

[0186] 1) all reference signal ports in the reference signal port set except the reference signal port associated with the port indication information;

[0187] 2) all reference signal ports in a port subset except the reference signal port associated with the port indication information, wherein the port subset is a subset of the reference signal port set.

[0188] In the above optional implementation manner, optionally, before the network side device receives the first CSI report reported by the terminal, the method further includes: the network side device sends a third high-layer signaling to indicate the port subset.

[0189] In an optional implementation, before the network side device receives the first CSI report reported by the terminal, the method further includes: the network side device indicating to the terminal, through a fourth high-layer signaling, the number of the port indication information associated with the CSI.

[0190] In the above optional implementation manner, optionally, the fourth high-layer signaling is used to configure one of the following:

[0191] a) The number of subbands associated with each port indication information;

[0192] b) The number of RBs associated with each port indication information;

[0193] c) The number of port indication information;

[0194] d) multiple sub-band indications, each of the sub-band indications is associated with a port indication information;

[0195] e) Multiple RB indications, each of which is associated with a port indication information.

[0196] In an optional implementation manner, the network side device receives a first CSI report reported by the terminal, including:

[0197] When the first CSI report meets a predetermined condition, the network side device receives the first CSI report in a time slot that is adjacent to a target time slot or a target time slot, wherein the target time slot is a time slot associated with downlink control information DCI associated with the first CSI report.

[0198] Optionally, the target time slot may be an uplink time slot or a downlink time slot. The DCI associated with the first CSI report may be a DCI for activating reporting of the first CSI report.

[0199] In the above optional implementation, optionally, the predetermined condition is related to at least one of the following:

[0200] (1) Number of candidate reference signal ports; for example, the predetermined condition may be: the number of candidate reference signal ports is less than or equal to a first value, where the first value may be an integer agreed upon by the protocol.

[0201] (2) The number of candidate reference signals; for example, the predetermined condition may be: the number of candidate reference signals is less than or equal to a second value, and the second value is an integer agreed upon in the protocol.

[0202] (3) The number of port indication information; for example, the predetermined condition may be: the number of port indication information is less than or equal to a third value, and the third value is an integer agreed upon in the protocol.

[0203] (4) The number of port quantity indication information; for example, the predetermined condition may be: the number of port quantity indication information is less than or equal to a third value, and the third value is an integer agreed upon by the protocol.

[0204] (5) The number of available CSI processing units (CPUs); for example, the predetermined condition may be: the number of available CSI processing units is greater than or equal to a fourth value, and the fourth value is an integer.

[0205] (6) Bandwidth associated with the CSI report; for example, the predetermined condition may be: the bandwidth associated with the CSI report is less than or equal to a fifth value, and the fifth value is a multiple of a frequency domain resource element (RE) or a frequency domain resource block (BR).

[0206] (7) A bandwidth associated with the candidate reference signal; for example, the predetermined condition may be that the bandwidth associated with the candidate reference signal is less than or equal to a sixth value, where the sixth value is a multiple of a frequency domain resource element (RE) or a frequency domain resource block (BR).

[0207] (8) The subcarrier spacing of the PDCCH associated with the DCI associated with the CSI report; for example, the predetermined condition may be: the subcarrier spacing of the PDCCH associated with the DCI associated with the CSI report is less than or equal to the seventh value, and the seventh value is a multiple of the unit subcarrier spacing (for example: 15KHz).

[0208] (9) Subcarrier spacing of PUCCH or PUSCH associated with the CSI report; for example, the predetermined condition may be: the subcarrier spacing of PUCCH or PUSCH associated with the CSI report is less than or equal to an eighth value, and the eighth value is a multiple of the unit subcarrier spacing.

[0209] (10) Minimum subcarrier spacing of a reference signal associated with a CSI report; for example, the predetermined condition may be that the minimum subcarrier spacing of a reference signal (CSI-RS) associated with a CSI report is less than or equal to a ninth value, and the ninth value is a multiple of a unit subcarrier spacing.

[0210] In an optional implementation, after the network side device receives the first CSI report reported by the terminal, the method further includes: the network side device determining a reference signal port used by the terminal based on at least one port indication information associated with the CSI.

[0211] Through the above technical solution provided by the embodiment of the present application, the PMI calculation can be simplified or not included, and the network side device can configure the CSI-RS more flexibly and set the precoding matrix of the CSI-RS, thereby avoiding user-specific CSI-RS as much as possible and saving CSI-RS overhead. Further, some port indication methods are provided to effectively reduce feedback overhead.

[0212] The channel state information reporting method provided in the embodiment of the present application can be executed by a channel state information reporting device. In the embodiment of the present application, the channel state information reporting method performed by the channel state information reporting device is taken as an example to illustrate the channel state information reporting device provided in the embodiment of the present application.

[0213] Figure 4 A schematic diagram showing a structure of a channel state information reporting device provided in an embodiment of the present application is shown as follows: Figure 4 As shown, the device 400 mainly includes: a first acquisition module 401 and a reporting module 402.

[0214] In an embodiment of the present application, a first acquisition module 401 is used to acquire channel state information CSI, wherein the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; a reporting module 402 is used to report a first CSI report, wherein the first CSI report includes the CSI.

[0215] In an optional implementation, the CSI is associated with at least one port indication information, including one of the following:

[0216] In the case where the CSI includes a precoding matrix indication PMI, the PMI is associated only with the at least one port indication information;

[0217] In the case where the CSI does not include the PMI, the CSI is associated with at least 2 port indication information;

[0218] In the case where the CSI does not include the PMI, the CSI is associated with one port indication information, the first CSI report includes the number of the one port indication information, or the network side device instructs the terminal to feed back one port indication information;

[0219] The CSI is associated with at least one channel quality indicator CQI, wherein one CQI is associated with one port indication information.

[0220] In an optional implementation, the at least two port indication information satisfies at least one of the following:

[0221] Resource blocks RBs associated with different port indication information are not completely the same;

[0222] The subbands associated with different port indication information are not exactly the same;

[0223] The reference signals associated with different port indication information are not completely the same.

[0224] In an optional implementation manner, acquiring channel state information CSI includes: acquiring the CQI by performing interference measurement using at least part of the reference signal ports in the reference signal port set.

[0225] In an optional implementation manner, the reference signal port set is associated with one reference signal, or the reference signal port set is associated with multiple reference signals.

[0226] In an optional implementation manner, each port indication information is associated with a combination number, and the combination number is used to determine the reference signal port selected by the terminal.

[0227] In an optional implementation, part 2 of the first CSI report includes the port indication information, and part 1 of the first CSI report includes port quantity indication information, where the port quantity indication information is used to indicate the number of reference signal ports selected by the terminal.

[0228] In an optional implementation manner, a plurality of the port indication information share one port quantity indication information, or each port indication information corresponds to one port quantity indication information.

[0229] In an optional implementation manner, the quantity of the port quantity indication information is determined through a first high-layer signaling.

[0230] In an optional implementation, each of the port indication information is associated with a first portion of content and a second portion of content, wherein the first portion of content is used to determine a reference signal port subset, and the second portion of content is used to determine a reference signal port selected by the terminal in the reference signal port subset.

[0231] In an optional implementation manner, a plurality of the port indication information shares the first portion of content.

[0232] In an optional implementation, the first acquisition module 401 is further configured to:

[0233] The bit width associated with any one of the port indication information is determined through at least one second high-layer signaling.

[0234] In an optional implementation, determining the bit width associated with any one of the port indication information through at least one second high-layer signaling includes at least one of the following:

[0235] Obtain a second high-level signaling, determine a candidate port set through the second high-level signaling, wherein all the port indication information are associated with the same candidate port set; determine a bit width associated with the port indication information based on the number of ports in the candidate port set;

[0236] Obtain a second high-level signaling, determine a candidate port set through the second high-level signaling, wherein each of the port indication information is associated with a candidate port subset, and all the candidate port subsets constitute a candidate port set indicated by the second high-level signaling; determine the bit width associated with any one of the port indication information based on the number of ports in the candidate port subset associated with any one of the port indication information;

[0237] Acquire multiple second high-layer signalings, determine multiple candidate port sets through the multiple second high-layer signalings, wherein each port indication information is associated with a candidate port set; determine the bit width associated with any one of the port indication information based on the number of ports in the candidate port set associated with any one of the port indication information.

[0238] In an optional implementation, the at least part of the reference signal ports includes one of the following:

[0239] all reference signal ports in the reference signal port set except the reference signal port associated with the port indication information;

[0240] All reference signal ports in the port subset except the reference signal port associated with the port indication information, and the port subset is a subset of the reference signal port set.

[0241] In an optional implementation, the port subset is determined through a third higher layer signaling.

[0242] In an optional implementation, the first acquisition module 401 is further configured to: determine, according to a fourth higher layer signaling, the quantity of the port indication information associated with the CSI.

[0243] In an optional implementation, the fourth high-layer signaling is used to configure one of the following:

[0244] The number of subbands associated with each port indication information;

[0245] The number of RBs associated with each port indication information;

[0246] The number of port indication information;

[0247] A plurality of subband indications, each of the subband indications being associated with a port indication information;

[0248] Multiple RB indications, each of the RB indications is associated with a port indication information.

[0249] In an optional implementation, the reporting module 402 is further configured to:

[0250] Set the priority of the first CSI report, wherein the priority of the first CSI report is higher than the priority of the second CSI report, the second CSI report has the same time domain characteristics as the first CSI report, and the second CSI report includes at least one of the following: a CSI report of non-layer 1 reference signal received power, and a CSI report of non-layer 1 signal to interference plus noise ratio.

[0251] In an optional implementation, when the first CSI report satisfies a predetermined condition, the reporting time slot of the first CSI report is the same as or adjacent to a target time slot, wherein the target time slot is a time slot associated with downlink control information DCI associated with the first CSI report.

[0252] In an optional implementation, the predetermined condition is related to at least one of the following:

[0253] The number of candidate reference signal ports;

[0254] The number of candidate reference signals;

[0255] The number of port indication information;

[0256] The port number indicates the number of messages;

[0257] The number of available CSI processing units;

[0258] The bandwidth associated with the CSI report;

[0259] a bandwidth associated with the candidate reference signal;

[0260] The subcarrier spacing associated with the CSI report, the DCI associated with the PDCCH;

[0261] The subcarrier spacing of the PUCCH or PUSCH associated with the CSI report;

[0262] Minimum subcarrier spacing of the reference signal associated with the CSI report.

[0263] The reporting device of the channel state information in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices other than a terminal. Exemplarily, the terminal may include but is not limited to the types of the terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0264] The channel state information reporting device provided in the embodiment of the present application can achieve Figure 2 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0265] Figure 5 A schematic diagram showing a structure of a device for acquiring channel state information according to an embodiment of the present application is shown as follows: Figure 5 As shown, the device 500 mainly includes: a transceiver module 501 and a second acquisition module 502.

[0266] In an embodiment of the present application, the transceiver module 501 is used to receive a first CSI report reported by a terminal, wherein the first CSI report includes CSI, and at least one port indication information is associated with the CSI, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; the second acquisition module 502 is used to obtain the CSI included in the first CSI report.

[0267] In an optional implementation, the CSI is associated with at least one port indication information, including one of the following:

[0268] In the case where the CSI includes a precoding matrix indication PMI, the PMI is associated only with the at least one port indication information;

[0269] In the case where the CSI does not include the PMI, the CSI is associated with at least 2 port indication information;

[0270] In the case where the CSI does not include the PMI, the CSI is associated with one port indication information, the first CSI report includes the number of the one port indication information, or the network side device instructs the terminal to feed back one port indication information;

[0271] The CSI is associated with at least one channel quality indicator CQI, wherein one CQI is associated with one port indication information.

[0272] In an optional implementation, the at least two port indication information satisfies at least one of the following:

[0273] Resource blocks RBs associated with different port indication information are not completely the same;

[0274] The subbands associated with different port indication information are not exactly the same;

[0275] The reference signals associated with different port indication information are not completely the same.

[0276] In an optional implementation manner, the reference signal port set is associated with one reference signal, or the reference signal port set is associated with multiple reference signals.

[0277] In an optional implementation manner, each port indication information is associated with a combination number, and the combination number is used to determine the reference signal port selected by the terminal.

[0278] In an optional implementation, part 2 of the first CSI report includes the port indication information, and part 1 of the first CSI report includes port quantity indication information, where the port quantity indication information is used to indicate the number of reference signal ports selected by the terminal.

[0279] In an optional implementation manner, a plurality of the port indication information share one port quantity indication information, or each port indication information corresponds to one port quantity indication information.

[0280] In an optional implementation, the transceiver module 501 is further configured to indicate the quantity of the port quantity indication information in the first CSI report through a first high-layer signaling.

[0281] In an optional implementation, each of the port indication information is associated with a first portion of content and a second portion of content, wherein the first portion of content is used to determine a reference signal port subset, and the second portion of content is used to determine a reference signal port selected by the terminal in the reference signal port subset.

[0282] In an optional implementation manner, a plurality of the port indication information shares the first portion of content.

[0283] In an optional implementation, the transceiver module 501 is further configured to indicate to the terminal, through at least one second higher layer signaling, a bit width associated with each of the port indication information.

[0284] In an optional implementation, indicating the bit width associated with each port indication information to the terminal through at least one second high-layer signaling includes at least one of the following:

[0285] Sending a second high-layer signaling, wherein the second high-layer signaling is used to determine a candidate port set, all the port indication information are associated with the same candidate port set, and the number of ports in the candidate port set indicates the bit width associated with the port indication information;

[0286] Sending a second high-level signaling, wherein the second high-level signaling is used to determine a candidate port set, each of the port indication information is associated with a candidate port subset, all of the candidate port subsets constitute a candidate port set indicated by the second high-level signaling, and the number of ports in the candidate port subset associated with each of the port indication information indicates the bit width associated with each of the port indication information;

[0287] Send multiple second high-layer signalings, wherein the multiple second high-layer signalings are used to determine multiple candidate port sets, wherein each port indication information is associated with a candidate port set, and the bit width associated with each port indication information is determined by the number of ports in the candidate port set associated with each port indication information.

[0288] In an optional implementation manner, the CQI is obtained by the terminal by performing interference measurement using at least some of the reference signal ports in the reference signal port set, and the at least some of the reference signal ports include one of the following:

[0289] all reference signal ports in the reference signal port set except the reference signal port associated with the port indication information;

[0290] All reference signal ports in the port subset except the reference signal port associated with the port indication information, and the port subset is a subset of the reference signal port set.

[0291] In an optional implementation, the transceiver module 501 is further configured to send a third higher layer signaling indicating the port subset.

[0292] In an optional implementation, the transceiver module 501 is further configured to indicate to the terminal, through a fourth higher layer signaling, the number of the port indication information associated with the CSI.

[0293] In an optional implementation, the fourth high-layer signaling is used to configure one of the following:

[0294] The number of subbands associated with each port indication information;

[0295] The number of RBs associated with each port indication information;

[0296] The number of port indication information;

[0297] A plurality of subband indications, each of the subband indications being associated with a port indication information;

[0298] Multiple RB indications, each of the RB indications is associated with a port indication information.

[0299] In an optional implementation manner, receiving a first CSI report reported by a terminal includes:

[0300] When the first CSI report satisfies a predetermined condition, the first CSI report is received in a time slot that is adjacent to a target time slot or a time slot, wherein the target time slot is a time slot associated with downlink control information DCI associated with the first CSI report.

[0301] In an optional implementation manner, the second acquisition module 502 is further configured to: determine a reference signal port used by the terminal based on at least one port indication information associated with the CSI.

[0302] The channel state information acquisition device provided in the embodiment of the present application can achieve Figure 3 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0303] like Figure 6 As shown, the embodiment of the present application also provides a communication device 600, including a processor 601 and a memory 602, and the memory 602 stores a program or instruction that can be run on the processor 601. For example, when the communication device 600 is a terminal, the program or instruction is executed by the processor 601 to implement the various steps of the above-mentioned channel state information reporting method embodiment, and can achieve the same technical effect. When the communication device 600 is a network side device, the program or instruction is executed by the processor 601 to implement the various steps of the above-mentioned channel state information acquisition method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0304] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 2 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 7 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0305] The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and at least some of the components of a processor 710.

[0306] Those skilled in the art will appreciate that the terminal 700 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 710 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 7 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0307] It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processing unit 7041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0308] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 701 can transmit the data to the processor 710 for processing; in addition, the RF unit 701 can send uplink data to the network side device. Generally, the RF unit 701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0309] The memory 709 can be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 709 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0310] The processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 710.

[0311] The processor 710 is configured to obtain channel state information CSI, wherein the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set;

[0312] The radio frequency unit 701 is configured to report a first CSI report, wherein the first CSI report includes the CSI.

[0313] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiment 2, and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0314] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 3 The steps of the method embodiment shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0315] Specifically, the embodiment of the present application also provides a network side device. Figure 8 As shown, the network side device 800 includes: an antenna 801, a radio frequency device 802, a baseband device 803, a processor 804 and a memory 805. The antenna 801 is connected to the radio frequency device 802. In the uplink direction, the radio frequency device 802 receives information through the antenna 801 and sends the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information to be sent and sends it to the radio frequency device 802. The radio frequency device 802 processes the received information and sends it out through the antenna 801.

[0316] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 803, which includes a baseband processor.

[0317] The baseband device 803 may include, for example, at least one baseband board on which a plurality of chips are arranged. Figure 8 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 805 through a bus interface to call the program in the memory 805 to execute the network device operations shown in the above method embodiment.

[0318] The network side device may further include a network interface 806, which is, for example, a Common Public Radio Interface (CPRI).

[0319] Specifically, the network side device 800 of the embodiment of the present application further includes: instructions or programs stored in the memory 805 and executable on the processor 804, and the processor 804 calls the instructions or programs in the memory 805 to execute. Figure 5 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0320] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned channel state information reporting method embodiment are implemented, or the various processes of the above-mentioned channel state information acquisition method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0321] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0322] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the various processes of the above-mentioned channel state information reporting method embodiment, or to implement the various processes of the above-mentioned channel state information acquisition method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0323] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0324] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned channel state information reporting method embodiment, or to implement the various processes of the above-mentioned channel state information acquisition method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0325] An embodiment of the present application also provides a system for acquiring channel state information, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the channel state information reporting method as described above, and the network side device can be used to execute the steps of the channel state information acquisition method as described above.

[0326] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0327] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0328] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A method for reporting channel state information, characterized in that: include: The terminal obtains channel state information CSI, wherein the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; The terminal reports a first CSI report, wherein the first CSI report includes the CSI.

2. The method according to claim 1, characterized in that The CSI is associated with at least one port indication information, including one of the following: In the case where the CSI includes a precoding matrix indication PMI, the PMI is associated only with the at least one port indication information; In the case where the CSI does not include the PMI, the CSI is associated with at least 2 port indication information; In the case where the CSI does not include the PMI, the CSI is associated with one port indication information, the first CSI report includes the number of the one port indication information, or the network side device instructs the terminal to feed back one port indication information; The CSI is associated with at least one channel quality indicator CQI, wherein one CQI is associated with one port indication information.

3. The method according to claim 2, characterized in that The at least two port indication information satisfies at least one of the following: Resource blocks RBs associated with different port indication information are not completely the same; The subbands associated with different port indication information are not exactly the same; The reference signals associated with different port indication information are not completely the same.

4. The method according to claim 2, characterized in that: The terminal acquiring channel state information CSI includes: the terminal acquiring the CQI by performing interference measurement using at least part of the reference signal ports in the reference signal port set.

5. The method according to any one of claims 1 to 4, characterized in that: The reference signal port set is associated with one reference signal, or the reference signal port set is associated with multiple reference signals.

6. The method according to any one of claims 1 to 5, characterized in that: Each of the port indication information is associated with a combination number, and the combination number is used to determine the reference signal port selected by the terminal.

7. The method according to claim 6, characterized in that Part 2 of the first CSI report includes the port indication information, and part 1 of the first CSI report includes port quantity indication information, where the port quantity indication information is used to indicate the number of reference signal ports selected by the terminal.

8. The method according to claim 7, characterized in that A plurality of the port indication information share one port quantity indication information, or each port indication information corresponds to one port quantity indication information.

9. The method according to claim 8, characterized in that The quantity of the port quantity indication information is determined through a first high-layer signaling.

10. The method according to any one of claims 1 to 5, characterized in that: Each of the port indication information is associated with a first part of content and a second part of content, wherein the first part of content is used to determine a reference signal port subset, and the second part of content is used to determine a reference signal port selected by the terminal in the reference signal port subset.

11. The method according to claim 10, characterized in that The plurality of port indication information shares the first part of content.

12. The method according to any one of claims 1 to 11, characterized in that: Before the terminal acquires the channel state information CSI, the method further includes: The terminal determines a bit width associated with each of the port indication information through at least one second high-layer signaling.

13. The method according to claim 12, characterized in that The terminal determines, through at least one second high-layer signaling, a bit width associated with each of the port indication information, including at least one of the following: The terminal obtains a second high-layer signaling, and determines a candidate port set through the second high-layer signaling, wherein all the port indication information are associated with the same candidate port set; the terminal determines a bit width associated with the port indication information based on the number of ports in the candidate port set; The terminal obtains a second high-layer signaling, and determines a candidate port set through the second high-layer signaling, wherein each of the port indication information is associated with a candidate port subset, and all the candidate port subsets constitute a candidate port set indicated by the second high-layer signaling; the terminal determines a bit width associated with each of the port indication information based on the number of ports in the candidate port subset associated with each of the port indication information; The terminal obtains multiple second high-layer signalings, and determines multiple candidate port sets through the multiple second high-layer signalings, wherein each port indication information is associated with a candidate port set; the terminal determines the bit width associated with each port indication information based on the number of ports in the candidate port set associated with each port indication information.

14. The method according to claim 4, characterized in that The at least part of the reference signal ports comprises one of the following: all reference signal ports in the reference signal port set except the reference signal port associated with the port indication information; All reference signal ports in the port subset except the reference signal port associated with the port indication information, and the port subset is a subset of the reference signal port set.

15. The method according to claim 14, characterized in that The port subset is determined through a third higher layer signaling.

16. The method according to any one of claims 1 to 15, characterized in that Before the terminal acquires channel state information CSI, the method further includes: the terminal determining, according to a fourth high-layer signaling, the quantity of the port indication information associated with the CSI.

17. The method according to claim 16, characterized in that The fourth high-level signaling is used to configure one of the following: The number of subbands associated with each port indication information; The number of RBs associated with each port indication information; The number of port indication information; A plurality of subband indications, each of the subband indications being associated with a port indication information; Multiple RB indications, each of the RB indications is associated with a port indication information.

18. The method according to any one of claims 1 to 17, characterized in that Before the terminal reports the first CSI report, the method further includes: Set the priority of the first CSI report, wherein the priority of the first CSI report is higher than the priority of the second CSI report, the second CSI report has the same time domain characteristics as the first CSI report, and the second CSI report includes at least one of the following: a CSI report of non-layer 1 reference signal received power, and a CSI report of non-layer 1 signal to interference plus noise ratio.

19. The method according to any one of claims 1 to 17, characterized in that: When the first CSI report satisfies a predetermined condition, the reporting time slot of the first CSI report is the same as or adjacent to a target time slot, wherein the target time slot is a time slot associated with downlink control information DCI associated with the first CSI report.

20. The method according to claim 19, characterized in that The predetermined condition is related to at least one of the following: The number of candidate reference signal ports; The number of candidate reference signals; The number of port indication information; The number of ports indicates the number of messages; The number of available CSI processing units; The bandwidth associated with the CSI report; a bandwidth associated with the candidate reference signal; The subcarrier spacing associated with the CSI report, the DCI associated with the PDCCH; The subcarrier spacing of the PUCCH or PUSCH associated with the CSI report; Minimum subcarrier spacing of the reference signal associated with the CSI report.

21. A method for acquiring channel state information, characterized in that: include: A network side device receives a first CSI report reported by a terminal, wherein the first CSI report includes CSI, and the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set.

22. The method according to claim 21, characterized in that The CSI is associated with at least one port indication information, including one of the following: In the case where the CSI includes a precoding matrix indication PMI, the PMI is associated only with the at least one port indication information; In the case where the CSI does not include the PMI, the CSI is associated with at least 2 port indication information; In the case where the CSI does not include the PMI, the CSI is associated with one port indication information, the first CSI report includes the number of the one port indication information, or the network side device instructs the terminal to feed back one port indication information; The CSI is associated with at least one channel quality indicator CQI, wherein one CQI is associated with one port indication information.

23. The method according to claim 22, characterized in that The at least two port indication information satisfies at least one of the following: Resource blocks RBs associated with different port indication information are not completely the same; The subbands associated with different port indication information are not exactly the same; The reference signals associated with different port indication information are not completely the same.

24. The method according to any one of claims 21 to 23, characterized in that The reference signal port set is associated with one reference signal, or the reference signal port set is associated with multiple reference signals.

25. The method according to any one of claims 21 to 23, characterized in that Each of the port indication information is associated with a combination number, and the combination number is used to determine the reference signal port selected by the terminal.

26. The method according to claim 25, characterized in that Part 2 of the first CSI report includes the port indication information, and part 1 of the first CSI report includes port quantity indication information, where the port quantity indication information is used to indicate the number of reference signal ports selected by the terminal.

27. The method according to claim 26, characterized in that A plurality of the port indication information share one port quantity indication information, or each port indication information corresponds to one port quantity indication information.

28. The method according to claim 27, characterized in that Before the network side device receives the first CSI report reported by the terminal, the method further includes: The network side device indicates the quantity of the port quantity indication information in the first CSI report through a first high-layer signaling.

29. The method according to any one of claims 21 to 23, characterized in that Each of the port indication information is associated with a first part of content and a second part of content, wherein the first part of content is used to determine a reference signal port subset, and the second part of content is used to determine a reference signal port selected by the terminal in the reference signal port subset.

30. The method according to claim 29, characterized in that The plurality of port indication information shares the first part of content.

31. The method according to any one of claims 21 to 23, characterized in that Before the network side device receives the first CSI report reported by the terminal, the method further includes: The network side device indicates to the terminal, through at least one second high-layer signaling, a bit width associated with each of the port indication information.

32. The method according to claim 31, characterized in that The network side device indicates to the terminal, through at least one second high-layer signaling, a bit width associated with each of the port indication information, including at least one of the following: The network side device sends a second high-layer signaling, wherein the second high-layer signaling is used to determine a candidate port set, all the port indication information is associated with the same candidate port set, and the number of ports in the candidate port set indicates the bit width associated with the port indication information; The network side device sends a second high-layer signaling, wherein the second high-layer signaling is used to determine a candidate port set, each of the port indication information is associated with a candidate port subset, all of the candidate port subsets constitute a candidate port set indicated by the second high-layer signaling, and the number of ports in the candidate port subset associated with each of the port indication information indicates a bit width associated with each of the port indication information; The network side device sends multiple second high-layer signalings, wherein the multiple second high-layer signalings are used to determine multiple candidate port sets, wherein each port indication information is associated with a candidate port set, and the bit width associated with each port indication information is determined by the number of ports in the candidate port set associated with each port indication information.

33. The method according to claim 22, characterized in that The CQI is obtained by the terminal by performing interference measurement by using at least some of the reference signal ports in the reference signal port set, where the at least some of the reference signal ports include one of the following: all reference signal ports in the reference signal port set except the reference signal port associated with the port indication information; All reference signal ports in the port subset except the reference signal port associated with the port indication information, and the port subset is a subset of the reference signal port set.

34. The method according to claim 33, characterized in that Before the network side device receives the first CSI report reported by the terminal, the method further includes: the network side device sends a third high-layer signaling indicating the port subset.

35. The method according to any one of claims 21 to 23, characterized in that Before the network side device receives the first CSI report reported by the terminal, the method further includes: the network side device indicates to the terminal, through a fourth high-layer signaling, the number of the port indication information associated with the CSI.

36. The method according to claim 35, characterized in that The fourth high-level signaling is used to configure one of the following: The number of subbands associated with each port indication information; The number of RBs associated with each port indication information; The number of port indication information; A plurality of subband indications, each of the subband indications being associated with a port indication information; Multiple RB indications, each of the RB indications is associated with a port indication information.

37. The method according to any one of claims 21 to 36, characterized in that The network side device receives a first CSI report reported by the terminal, including: When the first CSI report meets a predetermined condition, the network side device receives the first CSI report in a target time slot or a time slot adjacent to the target time slot, wherein the target time slot is a time slot associated with downlink control information DCI associated with the first CSI report.

38. The method according to any one of claims 21 to 37, characterized in that After the network side device receives the first CSI report reported by the terminal, the method further includes: The network side device determines a reference signal port used by the terminal based on at least one port indication information associated with the CSI.

39. A channel state information reporting device, characterized in that: include: A first acquisition module, configured to acquire channel state information CSI, wherein the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; A reporting module is used to report a first CSI report, wherein the first CSI report includes the CSI.

40. A device for acquiring channel state information, characterized in that: include: A transceiver module, configured to receive a first CSI report reported by a terminal, wherein the first CSI report includes CSI, and the CSI is associated with at least one port indication information, and the at least one port indication information is used to indicate a reference signal port selected by the terminal from a reference signal port set; The second acquisition module is used to acquire the CSI included in the first CSI report.

41. A terminal, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the channel state information reporting method as described in any one of claims 1 to 20 are implemented.

42. A network side device, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for obtaining the channel state information report as described in any one of claims 21 to 38 are implemented.

43. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the steps of the method for reporting the channel state information as described in any one of claims 1 to 20, or implements the steps of the method for obtaining the channel state information report as described in any one of claims 21 to 38.

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