Channel state information feedback method, terminal and network side equipment

Abstract

Disclosed are a channel state information feedback method, a terminal and a network side device, belonging to the technical field of wireless communications, the channel state information feedback method of the embodiment of the present application comprising: a terminal obtaining at least one first type of CSI information and at least one second type of CSI information by using at least one reference signal; the terminal feeds back a CSI report comprising at least one piece of CSI information to the network side equipment, and the at least one piece of CSI information comprises at least one of the following information: at least one piece of first type CSI information and at least one piece of second type CSI information.

Description

Technical Field

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

[0002] In related technologies, the Channel State Information (CSI) architecture can be divided into two parts: downlink CSI and uplink CSI, wherein the downlink CSI architecture includes a downlink physical channel and a downlink reference signal, and the uplink CSI architecture includes an uplink physical channel and an uplink reference signal.

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

[0004] In 5G systems, CSI is mainly used for adaptive antenna beamforming (Adaptive Beamforming) and multiple input multiple output (MIMO) technology to improve wireless transmission bandwidth and reliability. In addition, CSI can also be used for frequency reuse and interference coordination.

[0005] However, with the related CSI architecture, the terminal cannot obtain multiple types of CSI information, and thus the network-side device cannot obtain multiple types of CSI information through CSI reports. Summary of the invention

[0006] The embodiments of the present application provide a channel state information feedback method, a terminal, and a network-side device, which can solve the problem that the terminal cannot obtain multiple types of CSI information.

[0007] In a first aspect, a method for feedback of channel state information is provided, including: a terminal uses at least one reference signal to obtain at least one first-category CSI information and at least one second-category CSI information; the terminal feeds back a CSI report including at least one CSI information to a network side device, wherein the at least one CSI information includes at least one of the following: at least one of the first-category CSI information and at least one of the second-category CSI information.

[0008] In a second aspect, a method for acquiring channel state information is provided, comprising: a network side device configures at least one reference signal for a terminal, and indicates a reference signal for acquiring first type CSI information or a reference signal for acquiring second type CSI information in the at least one reference signal; the network side device receives a CSI report fed back by the terminal, wherein the CSI report includes at least one CSI information, and the at least one CSI information includes at least one of the following: at least one of the first type CSI information and at least one of the second type CSI information.

[0009] According to a third aspect, a channel state information feedback device is provided, comprising: an acquisition module, used to acquire at least one first-category CSI information and at least one second-category CSI information using at least one reference signal; and a feedback module, used to feed back a CSI report including at least one CSI information to a network side device, wherein the at least one CSI information includes at least one of the following: at least one first-category CSI information and at least one second-category CSI information.

[0010] In a fourth aspect, a device for acquiring channel state information is provided, comprising: a configuration module, used to configure at least one reference signal for a terminal, and indicate a reference signal for acquiring first-category CSI information or a reference signal for acquiring second-category CSI information in the at least one reference signal; a receiving module, used to receive a CSI report fed back by the terminal, wherein the CSI report includes at least one CSI information, and the at least one CSI information includes at least one of the following: at least one of the first-category CSI information and at least one of the second-category CSI information.

[0011] 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.

[0012] 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 communicate with an external device.

[0013] 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.

[0014] 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 communicate with an external device.

[0015] In the 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.

[0016] In the tenth aspect, a wireless communication 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.

[0017] 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.

[0018] In the twelfth aspect, a computer program / program product is provided, wherein the computer program / program product 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 described in the first aspect, or to implement the method described in the second aspect.

[0019] In an embodiment of the present application, the terminal uses at least one reference signal to obtain at least one first-category CSI information and at least one second-category CSI information, and then feeds back a CSI report including at least one CSI information to a network-side device, where the at least one CSI information includes at least one of the following: at least one first-category CSI information and at least one second-category CSI information. Through the technical solution provided in the embodiment of the present application, the terminal can use at least one reference signal to obtain at least one first-category CSI information and at least one second-category CSI information, and then can feed back at least one of the at least one first-category CSI information and at least one second-category CSI information according to the specific circumstances of the obtained first-category CSI information and the second-category CSI information, so that the terminal can obtain multiple types of CSI information and feed back at least one type of CSI information, so that the network-side device can obtain multiple types of CSI information through the CSI report, which is convenient for the network-side device to manage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A block diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0021] Figure 2A schematic diagram showing a flow chart of a method for feeding back channel state information provided in an embodiment of the present application;

[0022] Figure 3 Another schematic diagram showing a flow chart of a method for feeding back channel state information provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram showing a flow chart of a method for acquiring channel state information provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram showing a structure of a channel state information feedback device provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram showing a structure of a device for acquiring channel state information provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram showing the structure of a communication device provided in an embodiment of the present application is shown;

[0027] Figure 8 A schematic diagram showing the hardware structure of a terminal provided in an embodiment of the present application is shown;

[0028] Fig. 9 A schematic diagram of the hardware structure of a network side device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In related technologies, CSI reports can usually be configured as:

[0036] Periodic CSI reporting (P-CSI): Transmitted only on PUCCH

[0037] Semi-persistent CSI reporting (SP-CSI): Transmitted on PUCCH or PUSCH. PUSCH-based SP-CSI reporting is activated and deactivated by the CSI request field (CSI Req terminal st) in the DCI signaling. RRC configures a maximum of 64 trigger states (Trigger Stat), each trigger state corresponds to a CSI reporting feedback setting (CSI Report Setting), and when used for CSI acquisition, each CSI Report Setting associated with the resource setting (Resource Setting) contains only one CSI-RS resource set.

[0038] ·Aperiodic CSI report (AP-CSI): Transmitted only on PUSCH. PUSCH-based A-CSI reporting is activated by DCI signaling. RRC configures multiple trigger states (Trigger Stat), each trigger state corresponds to one or more CSI report feedback settings (CSI Report Setting). The CSI request field (CSI Req terminal st) in DCI triggers a TriggerStat. The CSI request field in DCI format 0_1 ​​is configured to be 6 bits at most, so a maximum of 64 CSI trigger states are supported. When the CSI trigger state configured by RRC is greater than 64, MAC CE signaling maps 64 of the trigger states to the CSI request field; each CSI trigger state can be associated with 1 to 3 resource settings. If the resource setting contains multiple resource sets, only one of the resource sets is selected. The QCL information of the CSI-RS resources in this resource set is configured for each resource by the TCI state.

[0039] In addition, CSI resource settings can usually be as follows:

[0040] M ≥ 1 resource setting;

[0041] A resource configuration includes S ≥ 1 CSI-RS resource sets (resource set);

[0042] A resource set contains Ks≥1 RS resources, such as channel measurement CSI-RS / CSI-IM resources / interference measurement CSI-RS;

[0043] One CSI-RS resource is used to configure the number of CSI-RS ports and information on the time-frequency position, etc.; one CSI-IM resource is used to configure information on the time-frequency position, etc. of the CSI-IM.

[0044] In addition, in the related art, generally, the terminal can determine the content included in the CSI report through high-level signaling or default rules. For example, the high-level signaling or default rules may indicate that the content of the CSI report includes: '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'.

[0045] 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.

[0046] However, with the existing CSI architecture, the terminal cannot obtain multiple types of CSI information, and thus the network side device cannot obtain multiple types of CSI information through CSI reports. For example, in the related art, the network side device cannot obtain the CSI information of the interference channel through the CSI report, which is not conducive to the network using the algorithm for interference management. In addition, with the current CSI architecture, the network side device cannot allow the terminal to feedback multiple types of CSI. In response to at least one of the above technical problems, an embodiment of the present application provides an improved feedback scheme for channel state information.

[0047] The following, in conjunction with the accompanying drawings, describes in detail the channel state information feedback scheme provided by the embodiments of the present application through some embodiments and their application scenarios.

[0048] Figure 2 A schematic flow chart of a method for feeding back channel state information provided in an embodiment of the present application is shown. The method 200 may be executed by a terminal. In other words, the method may be executed by software or hardware installed on the terminal. Figure 2 As shown, the method may include the following steps.

[0049] S210: The terminal obtains at least one first type of CSI information and at least one second type of CSI information by using at least one reference signal.

[0050] In an embodiment of the present application, the first type of CSI information may be CSI information of a service channel, and the network side device may perform adaptive antenna beamforming (AdaptiveBeamforming), precoding (Precoding) or multiple input multiple output (Multiple Input Multiple Output, MIMO) management, etc. on the service channel based on the first type of CSI information fed back by the terminal.

[0051] In one implementation, the first type of CSI information may include: first CSI information, which may include at least one of the following: precoding matrix indicator (PMI), channel quality indicator (CQI), rank indicator (RI), layer indicator (LI), and channel state information reference signal (CSI Reference Signal, CSI-RS) resource indication (CSI-RS Resource Indicator, CRI).

[0052] In an embodiment of the present application, the second type of CSI information may be CSI information of an interference channel, and the network side device may perform interference management using an algorithm based on the second type of CSI information fed back by the terminal.

[0053] In an embodiment of the present application, the network side device may also perform adaptive antenna beamforming (Adaptive Beamforming), precoding (Precoding) or multiple input multiple output (Multiple Input Multiple Output, MIMO) management on the service channel based on the first type of CSI information and / or the second type of CSI information fed back by the terminal.

[0054] In one implementation, the second type of CSI information may include at least one of the following:

[0055] (1) Codebook subset restriction information, used to indicate to the network side device the beam directions available to the terminal, or used to indicate to the network side device the beam directions unavailable to the terminal.

[0056] Optionally, a beam direction may be associated with an angle information or a basis vector in a basis vector set or a DFT vector in a discrete Fourier transform (DFT) vector set, etc.

[0057] (2) Second CSI information, where the second CSI information includes: at least one of PMI, CQI, RI, LI and CRI.

[0058] For example, at least one of PMI, CQI, RI, LI and CRI of the interference channel may be indicated by the second CSI information.

[0059] (3) Partial information of precoding matrix;

[0060] Optionally, the partial information of the precoding matrix may be some basis vectors among multiple basis vectors associated with the precoding matrix. For example, if a precoding matrix is ​​associated with L spatial basis vectors, then the partial information of the precoding matrix may be K spatial basis vectors, where K is less than or equal to L.

[0061] (4) Target indication, used to indicate energy information or power information.

[0062] For example, the second type of CSI information may include available beam information and energy intensities of available beams; or the second type of CSI information may include K spatial basis vectors and their associated energy intensities.

[0063] In one implementation, the reference signal associated with the second type of CSI information may be a channel measurement reference signal indicated by a network side device. In this implementation, the terminal may obtain the second type of CSI information using the channel measurement reference signal indicated by the network side device.

[0064] In the above implementation, optionally, the reference signal associated with the first type of CSI information and the reference signal associated with the second type of CSI information are reference signals in different reference signal groups or different reference signal sets. Thus, the terminal can obtain the first type of CSI information and the second type of CSI information through different channel measurement reference signals. Optionally, the division of the reference signal group or reference signal set can be explicitly divided by network signaling. For example: the network configures multiple reference signal groups or reference signal sets to associate the reference signal associated with the first type of CSI information with the reference signal associated with the second type of CSI information.

[0065] In another implementation, the reference signal associated with the second type of CSI information is an interference measurement reference signal indicated by a network side device. In the above implementation, the network side device may indicate a reference signal for obtaining the first type of CSI information and a reference signal for obtaining the second type of CSI information, respectively, so that the terminal can obtain the corresponding CSI information through the corresponding reference signal. Optionally, for obtaining the interference measurement reference signal associated with the second type of CSI information, the terminal does not assume that each reference signal port is associated with a transport layer.

[0066] In another implementation, the reference signal associated with the second type of CSI information may be a third reference signal for obtaining the second type of CSI information indicated by high-level signaling in the at least one reference signal. For example, the network-side device may indicate the third reference signal for obtaining the second type of CSI information in the at least one reference signal by high-level signaling. For another example, the network implicitly indicates through high-level signaling that the reference signals associated with the first type of CSI information among multiple reference signals associated with a reference signal set are the first N, and the remaining reference signals are reference signals associated with the second type of CSI information.

[0067] In the above implementation, optionally, the fourth reference signal in the at least one reference signal except the third reference signal is a reference signal used to obtain the first type of CSI information. Optionally, the reference signal used to obtain the first type of CSI information and the third reference signal can be associated with the same CSI-RS resource configuration signaling. That is, the reference signal used to obtain the first type of CSI information and the third reference signal can be configured through the same CSI-RS resource configuration signaling.

[0068] In one implementation, the reference signal associated with the first type of CSI information is a fourth reference signal in the at least one reference signal indicated by the network side device through high-layer signaling for obtaining the first type of CSI information. For example, the network side device may indicate the fourth reference signal in the at least one reference signal for obtaining the first type of CSI information through high-layer signaling.

[0069] In the above implementation, optionally, a third reference signal other than the fourth reference signal in the at least one reference signal is a reference signal used to obtain the second type of CSI information. Optionally, the reference signal used to obtain the second type of CSI information and the fourth reference signal are associated with the same CSI-RS resource configuration signaling.

[0070] In one implementation, the terminal using at least one reference signal to obtain at least one first type of channel state information CSI information may include: the terminal selecting at least one first reference signal to obtain at least one first type of CSI information, or the terminal selecting at least one first type of CSI information from at least one first type of CSI information obtained through at least one reference signal. In this implementation, the terminal may select at least one first reference signal from at least one reference signal configured by a network-side device to obtain the first type of CSI information, or the terminal using at least one reference signal to obtain at least one first type of CSI information and then select at least one first type of CSI information obtained.

[0071] In the above implementation, optionally, the terminal may select the at least one first reference signal within a first selection range determined by the first high-layer signaling sent by the network-side device to obtain at least one of the first-category CSI information. That is, the network-side device may limit the first selection range of the reference signal selected by the terminal for obtaining the first-category CSI information through the first high-layer signaling, and the terminal selects the first reference signal for obtaining the first-category CSI information within the first selection range, thereby ensuring that the first reference signal selected by the terminal meets the requirements of the network-side device.

[0072] In the above implementation, optionally, the terminal may further include first indication information in the fed-back CSI report, where the first indication information is used to indicate a first reference signal associated with the fed-back first type of CSI information. Through this implementation, the network side device may be able to learn the reference signal associated with the first type of CSI information fed back by the terminal, so as to facilitate subsequent channel management by the network side device.

[0073] Optionally, when there is a first selection range, the first indication information only needs to indicate the first reference signal within the first selection range associated with the first type of CSI information fed back, thereby reducing the indication overhead of the first indication information.

[0074] In one implementation, the terminal using at least one reference signal to obtain at least one second type of CSI information may include: the terminal selecting at least one second reference signal to obtain at least one second type of CSI information. In this implementation, the terminal may select at least one second reference signal from at least one reference signal configured by the network side device to obtain the second type of CSI information.

[0075] In the above implementation, optionally, the terminal may select the at least one second reference signal within a second selection range determined by the second high-layer signaling sent by the network-side device to obtain at least one second-type CSI information. That is, the network-side device may limit the second selection range of the reference signal selected by the terminal for obtaining the second-type CSI information through the second high-layer signaling, and the terminal selects the second reference signal for obtaining the second-type CSI information within the second selection range, thereby ensuring that the second reference signal selected by the terminal meets the requirements of the network-side device.

[0076] In the above implementation, optionally, the terminal may further include second indication information in the fed-back CSI report, where the second indication information is used to indicate a second reference signal associated with the fed-back second type of CSI information. Through this implementation, the network side device may be aware of the reference signal associated with the second type of CSI information fed back by the terminal, so as to facilitate subsequent interference management by the network side device.

[0077] Optionally, when there is a second selection range, the second indication information only needs to indicate the second reference signal within the second selection range associated with the second type of CSI information fed back, thereby reducing the indication overhead of the second indication information.

[0078] For example, the network side device configures two reference signal sets, one is the first selection range, and the other is the second selection range. It is also possible that the high-level signaling implicitly indicates a range, for example, indicating N, indicating that the first N reference signals are the first selection range.

[0079] In one implementation, the terminal may use at least one reference signal group or reference signal set to obtain at least one first type of CSI information or second type of CSI information. Further, the first type of CSI information and the second type of CSI information form a service-interference pair, and the terminal may select CSI information associated with multiple service-interference pairs to feed back to the network.

[0080] For example, the network configures a reference signal group or a reference signal set, wherein the set includes K reference signals. Assuming that the terminal selects the i-th reference signal for obtaining the first type of CSI information, then for the terminal, the second reference signal associated with the i-th reference signal for obtaining the second type of CSI information is selected, and the terminal obtains or selects one or more corresponding second types of CSI information. At this time, these second types of CSI information form a pair of service-interference pairs with the first type of CSI information. Further, the terminal obtains another pair of service-interference pairs according to network instructions or its own capabilities or its own implementation. The terminal feeds back the CSI information associated with these two pairs of service-interference pairs to the network. This increases the flexibility of the network.

[0081] In one implementation, at least one third reference signal associated with the second type of CSI information (i.e., a reference signal used to obtain the second type of CSI information, including the above-mentioned second reference signal) can be associated with the same target information, or at least one third reference signal can also be associated with non-completely identical target information.

[0082] In the above implementation, optionally, the target information includes but is not limited to at least one of the following information used by the terminal: timing information, quasi-co-location information, spatial relationship information, spatial parameter information, frequency domain relationship information, frequency domain parameter information, average delay information, delay spread information, time domain relationship information, time domain parameter information, average Doppler information, Doppler spread information, and power information.

[0083] Optionally, the target information can be used by the terminal to perform at least one of the following operations: channel estimation, demodulation of reference signal, demodulation of data, calibration of receiving parameters, calibration of receiver, determination of receiving parameters, and determination of receiver.

[0084] In one implementation, when at least one third reference signal is associated with the same target information, the target information is determined by at least one of the following:

[0085] (1) Default rules;

[0086] (2) High-level signaling instructions;

[0087] (3) Medium Access Control Element (MAC-CE) indication;

[0088] (4) Downlink Control Information (DCI) indication;

[0089] (5) a reference signal associated with the first type of CSI information;

[0090] Optionally, the number of reference signals used to obtain the first type of CSI information may be limited to 1;

[0091] Further, if the number of reference signals associated with the first type of CSI information is greater than 1, it may also be possible to restrict the acquisition of multiple reference signals of the first type of CSI information to be associated with the same target information.

[0092] (6) A reference signal selected by the terminal for obtaining the first type of CSI information.

[0093] In the above implementation, optionally, when the terminal selects at least one first reference signal to obtain at least one first-type CSI information and the terminal selects or obtains at least one second-type CSI information based on at least one second reference signal, the target information of the at least one second reference signal is obtained through the at least one first reference signal selected by the terminal.

[0094] For example, after the terminal selects a first reference signal to obtain the first type of CSI information, the terminal assumes that the target information of all second reference signals used to obtain the second type of CSI information can refer to the selected first reference signal. Optionally, the terminal can select at least one second reference signal associated with the second type of CSI information to feed back to the network.

[0095] In one implementation, when at least one third reference signal is associated with non-completely identical target information, the target information associated with each of the third reference signals is determined by at least one of the following:

[0096] (1) Default rules;

[0097] (2) High-level signaling instructions;

[0098] (3) MAC-CE indication;

[0099] (4) DCI indication;

[0100] (5) a reference signal associated with the third reference signal and used to obtain the first type of CSI information;

[0101] Optionally, the number of reference signals used to obtain the first type of CSI information is greater than 1.

[0102] Optionally, the reference signal used to obtain the first type of CSI information is associated with target information that is not completely the same.

[0103] Further, the terminal can obtain, through high-level signaling or default rules, a reference signal for obtaining the first type of CSI information associated with each reference signal for obtaining the second type of CSI information. That is, the terminal obtains, through high-level signaling or default rules, a reference signal for obtaining the first type of CSI information associated with each of the third reference signals.

[0104] (6) A reference signal selected by the terminal for obtaining the first type of CSI information.

[0105] Optionally, the number of reference signals configured by the network side device for obtaining the first type of CSI information is greater than 1.

[0106] Optionally, the number of reference signals selected by the terminal for obtaining the first type of CSI information is greater than or equal to 1.

[0107] Optionally, the reference signal configured by the network side device for obtaining the first type of CSI information is associated with target information that is not completely the same.

[0108] For example, after the terminal selects two first reference signals to obtain the first type of CSI information, the terminal assumes that the target information of the first half of the second reference signals used to obtain the second type of CSI information refers to the selected first first reference signal, and the target information of the second half of the second reference signals refers to the selected second first reference signal. Optionally, the terminal can select at least one second reference signal associated with the second type of CSI information to feed back to the network.

[0109] For another example, the network side device configures 2 reference signal sets, and the first reference signal set includes 2 reference signals, wherein the first reference signal is associated with the first half of the third reference signal in the second set, and the second reference signal is associated with the second half of the third reference signal in the second set. In this case, the 2 reference signals in the first set may be different, so the third reference signal may be associated with non-identical target information. Optionally, the terminal selects a reference signal in the first set, and further determines which reference signals in the second set the terminal receives.

[0110] Optionally, through the above implementation, the terminal may determine, according to the target information, a third reference signal for obtaining the second type of CSI information, and further obtain the second type of CSI information.

[0111] Optionally, through the above implementation, the terminal may determine target information associated with the third reference signal for acquiring the second type of CSI information according to the first reference signal or the selected first reference signal.

[0112] S220, the terminal feeds back a CSI report including at least one CSI information to the network side device.

[0113] In an embodiment of the present application, the at least one CSI information includes at least one of the following: at least one of the first type of CSI information and at least one of the second type of CSI information. By feeding back at least one CSI information, the terminal can indicate to the network the beam direction with strong interference and the reference signal with strong interference.

[0114] That is, the terminal may feed back at least one of the first-type CSI information to the network side device without feeding back at least one of the second-type CSI information. For example, if the terminal determines that the interference strength of all reference signals (or reference signals used to obtain the second-type CSI information) is lower than the threshold value based on the at least one second-type CSI information obtained, the terminal may feed back at least one of the first-type CSI information without feeding back at least one of the second-type CSI information, and the network side device may learn that the interference strength of all reference signals (or reference signals used to obtain the second-type CSI information) is lower than the threshold value based on the received CSI report. Alternatively, the terminal may feed back at least one of the first-type CSI information and at least one of the second-type CSI information to the network side device. For example, if the terminal determines that the interference strength of the first-type CSI information and one or more reference signals that meet the reporting conditions is higher than the threshold value based on the at least one first-type CSI information and at least one second-type CSI information obtained, at least one of the first-type CSI information and at least one of the second-type CSI information may be fed back. Alternatively, the terminal may not feed back at least one of the first-type CSI information to the network side device but feed back at least one of the second-type CSI information. For example, if the terminal determines not to store the first type of CSI information that meets the reporting conditions and the interference strength of one or more reference signals is higher than a threshold based on at least one first type of CSI information and at least one second type of CSI information obtained, it may not feed back at least one of the first type of CSI information but feed back at least one of the second type of CSI information.

[0115] In an embodiment of the present application, optionally, the second type of CSI information fed back by the terminal defaults to broadband CSI information, that is, the granularity of PMI or CQI in the second type of CSI information fed back by the terminal is broadband, or the related indication information of PMI or CQI is not related to the number of PMI subbands or the number of CQI subbands.

[0116] In one implementation, the priority of the second type of CSI information fed back by the terminal is lower than that of the first type of CSI information fed back by the terminal, that is, the terminal gives priority to feeding back the first type of CSI information. Therefore, S220 may include: in the case where the CSI report cannot carry all of the at least one first type of CSI information and the at least one second type of CSI information, the terminal gives priority to discarding at least part of the at least one second type of CSI information.

[0117] Using the above implementation method, if a CSI report includes both the first category CSI information and the second category CSI information, the priority of the second category CSI information fed back by the terminal is lower than the first category CSI information fed back by the terminal. In this way, when part of the content of the CSI report is discarded, the first category CSI information can be retained as much as possible, thereby improving the utilization rate of the CSI report.

[0118] In another implementation, the terminal feeds back multiple first-category CSI information and multiple second-category CSI information, then the terminal first maps one first-category CSI information, and then maps the second-category CSI information associated with the first-category CSI information, for example: second-category CSI information associated with the same target information as the first-category CSI information, then maps one first-category CSI information, and then maps the second-category CSI information associated with the first-category CSI information, and so on. Therefore, S220 may include: in the case where the CSI report cannot carry all of the at least one first-category CSI information and the at least one second-category CSI information, the terminal preferentially discards at least part of the at least one first-category CSI information and / or the at least one second-category CSI information.

[0119] Figure 3 Another flow chart of the method for feeding back channel state information provided by an embodiment of the present application is shown. The method 300 may be executed by a terminal. In other words, the method may be executed by software or hardware installed on the terminal. Figure 3 As shown, the method may include the following steps.

[0120] S310, the terminal feeds back CSI-related information to the network-side device.

[0121] In the embodiment of the present application, the CSI related information includes but is not limited to at least one of the following:

[0122] (1) the granularity of the second type of CSI information supported by the terminal;

[0123] (2) indication information of whether the terminal supports feedback of the second type of CSI information;

[0124] (3) the amount of second-category CSI information that the terminal supports measuring;

[0125] (4) the amount of second type CSI information supported by the terminal for feedback;

[0126] (5) content included in the second type of CSI information supported by the terminal;

[0127] (6) Whether the terminal supports the indication information including the target indication in the second type of CSI information.

[0128] The terminal feeds back the above CSI-related information to the network side device, so that the network side device can obtain the above CSI-related information of the terminal, and then configure a reference signal for the terminal based on these CSI-related information, or instruct the terminal to use a reference signal to obtain the first type of CSI information, or instruct the terminal to use a reference signal to obtain the second type of CSI information, or configure a CSI report, etc.

[0129] S320: The terminal obtains at least one first type of CSI information and at least one second type of CSI information by using at least one reference signal.

[0130] This step is the same as the above-mentioned S210. For details, please refer to the above-mentioned related descriptions, which will not be repeated here.

[0131] S330, the terminal feeds back a CSI report including at least one CSI information to the network side device, wherein the at least one CSI information includes at least one of the following: at least one of the first category CSI information and at least one of the second category CSI information.

[0132] This step is the same as the above-mentioned S220. For details, please refer to the above-mentioned related description, which will not be repeated here.

[0133] Through the above-mentioned technical solution provided in the embodiment of the present application, the terminal feeds back the CSI-related information of the terminal to the network side device, so that the network side device can perform relevant configuration or instructions of CSI feedback based on the CSI-related information fed back by the terminal, thereby ensuring that the configuration or instruction of the network side device can meet the capabilities or requirements of the terminal.

[0134] Figure 4 A flow chart of a method for acquiring channel state information provided by an embodiment of the present application is shown. The method 400 may be executed by a network side device. In other words, the method may be executed by software or hardware installed on the network side device. Figure 4 As shown, the method may include the following steps.

[0135] S410: A network-side device configures at least one reference signal for a terminal, and indicates a reference signal for obtaining first-type CSI information or a reference signal for obtaining second-type CSI information in the at least one reference signal.

[0136] In an embodiment of the present application, a network side device may configure at least one reference signal for a terminal. The at least one reference signal may all be a channel measurement reference signal, and the network side device may indicate a reference signal used to obtain the first type of CSI information, and the remaining reference signals may be used to obtain the second type of CSI information, or indicate a reference signal used to obtain the second type of CSI information, and the remaining reference signals may be used to obtain the first type of CSI information. Alternatively, the network side device may also directly configure a reference signal for obtaining the first type of CSI information and a reference signal for obtaining the second type of CSI information. Alternatively, the network side device may also first configure at least one reference signal, and then indicate, through high-layer signaling, a reference signal used to obtain the first type of CSI information or a reference signal used to obtain the second type of CSI information.

[0137] In one implementation, the network side device indicates that the reference signal used to obtain the first type of CSI information or the reference signal used to obtain the second type of CSI information in the at least one reference signal includes at least one of the following:

[0138] (1) A network-side device sends a first high-layer signaling to a terminal, where the first high-layer signaling indicates that the terminal selects a first selection range of a first reference signal for acquiring the first-type CSI information; the terminal may select a first reference signal for acquiring the first-type CSI information within the first selection range indicated by the first high-layer signaling.

[0139] (2) The network side device sends a second high-layer signaling to the terminal, where the second high-layer signaling indicates that the terminal selects a second selection range of the second reference signal for obtaining the second type of CSI information. The terminal may select the second reference signal for obtaining the second type of CSI information within the second selection range indicated by the second high-layer signaling.

[0140] In one implementation, the network side device configures or indicates target information to the terminal, and the target information includes at least one of the following: timing information, quasi-co-location information, spatial relationship information, spatial parameter information, frequency domain relationship information, frequency domain parameter information, average delay information, delay spread information, time domain relationship information, time domain parameter information, average Doppler information, Doppler spread information, and power information. For example, the network side device can configure or indicate the target information through MAC-CE or DCI, so that after selecting the reference signal associated with the first type of CSI, the reference signal associated with the second type of CSI can be determined based on the target information of the reference signal associated with the first type of CSI, and the feedback of the second type of CSI information can be obtained.

[0141] In one implementation, before S410, the method may further include: the network side device receiving at least one of the following feedback from the terminal:

[0142] A granularity of the second type of CSI information supported by the terminal;

[0143] Indication information of whether the terminal supports feedback of second-category CSI information;

[0144] The amount of second type of CSI information supported by the terminal for measurement;

[0145] The amount of second type of CSI information supported by the terminal for feedback;

[0146] Content included in the second type of CSI information supported by the terminal;

[0147] Whether the terminal supports the indication information including the target indication in the second type of CSI information.

[0148] Through this implementation, the network side device can obtain the CSI related information fed back by the terminal, and then perform relevant configuration or indication of CSI feedback based on the parameters fed back by the terminal.

[0149] In addition, the network side device may also determine whether the CSI report includes the second type of CSI information according to the indication information fed back by the terminal whether the second type of CSI information can be fed back.

[0150] S420, the network side device receives the CSI report fed back by the terminal, wherein the CSI report includes at least one CSI information, and the at least one CSI information includes at least one of the following: at least one of the first category CSI information and at least one of the second category CSI information.

[0151] Among them, the terminal can feed back the CSI report to the network side device according to the method described in the above method 200 or 300. For details, please refer to the above related description, which will not be repeated here.

[0152] In one implementation, the CSI report further includes at least one of the following:

[0153] (1) first indication information, where the first indication information is used to indicate a first reference signal associated with the first type of CSI information fed back;

[0154] (2) Second indication information, where the second indication information is used to indicate a second reference signal associated with the second type of CSI information fed back.

[0155] Optionally, in the above implementation, after the network side device receives the CSI report fed back by the terminal, the method further includes: the network side device determines the reference signal associated with the at least one CSI information included in the CSI report based on target indication information, and the target indication information includes at least one of the following: the first indication information, the second indication information.

[0156] Through the above optional implementation, the network side device can determine that the CSI report includes at least one reference signal associated with CSI information based on the first indication information or the second indication information carried in the CSI report, so that channel management or interference management can be performed based on the CSI information associated with these reference signals, thereby effectively improving the system signal to interference noise ratio level and transmission performance.

[0157] In one implementation, the network side device may further configure or indicate at least one of the following to the terminal: the amount of first-category CSI information included in the CSI report, and the amount of second-category CSI information included in the CSI report. Through this implementation, the network side device may configure or indicate the amount of first-category CSI information or second-category CSI information fed back by the terminal, so that the corresponding amount of first-category CSI information or second-category CSI information may be obtained from the terminal.

[0158] In one implementation, the network side device may further configure or indicate at least one of the following to the terminal: whether to select the first type of CSI information, whether to select the second type of CSI information. That is, the network side device may indicate whether the terminal selects to feedback part of the first type of CSI information or the second type of CSI information when feeding back the first type of CSI information or the second type of CSI information, or feeds back all the first type of CSI information or the second type of CSI information.

[0159] To facilitate understanding of the technical solution provided by the embodiment of the present application, the technical solution provided by the embodiment of the present application is described below by taking the first type of CSI information as service CSI information and the second type of CSI information as interference CSI information as an example.

[0160] Embodiment 1

[0161] In this embodiment, the terminal uses at least one reference signal to obtain at least one CSI information, and the at least one CSI information may include at least one service CSI information and / or at least one interference CSI information. The service CSI information may be used by the network to perform precoding operations on terminal data, and the interference CSI information may be used by the network to perform interference management operations.

[0162] For example, the network configures multiple CSI-RS for the terminal to obtain CSI information, and the network instructs the terminal to feedback M service CSI information and N interference CSI information through high-level signaling, where M and N are both positive integers. For another example, the network configures multiple CSI-RS for the terminal to obtain CSI information, and the network instructs the terminal through high-level signaling that it can selectively feedback interference CSI information. The terminal may feedback 1 service CSI information and 1 interference CSI information, or 1 service CSI information, or only feedback interference CSI information, or may not feedback any CSI information.

[0163] The reference signal is usually sent by the network for acquiring CSI information of the channel. The reference signal may be a CSI-RS configured by the network, a partial port of a CSI-RS configured by the network, or a CSI-RS port group configured by the network.

[0164] The service CSI information may be first CSI information depending on the network configuration, including one or more of PMI, CQI, RI, LI, and CRI. Further, optionally, the granularity (wideband or subband) of the PMI and CQI may be indicated by the network through high-layer signaling.

[0165] The interference CSI information includes at least one of the following:

[0166] 1. CBSR (codebook subset restriction) information, the CBSR information can be a string of 0-1 bit sequences, used to indicate to the network the beam direction available to the terminal or the beam direction unavailable to the terminal. Optionally, a beam direction can be associated with a DFT vector. Further, optionally, the network can configure the terminal to only indicate to the network the beam directions that are above or below a first threshold value, where the first threshold value can be a network configuration or a value agreed upon by the protocol. Alternatively, when the terminal indicates to the network the beam direction available to the terminal or the beam direction unavailable to the terminal, it also indicates the relative strength information of the corresponding beam to facilitate the network to make a choice;

[0167] 2. First CSI information: Optionally, the granularity of PMI and CQI in the first CSI information is broadband by default;

[0168] 3. Partial information of the precoding matrix, which is usually associated with some basis vectors among the multiple basis vectors associated with the precoding matrix. For example, if a precoding matrix is ​​associated with L spatial basis vectors and M frequency domain basis vectors, the basis vectors associated with the partial information of the precoding matrix may be K spatial basis vectors, where K is less than or equal to L;

[0169] 4. Target indication, used to indicate energy information or power information. Optionally, the target indication can be information that can characterize energy, power or intensity, such as eigenvalues, CQI, RSRP, etc. For example, the interference CSI information includes available beam information and the energy intensity of the available beams; or the interference information includes K spatial basis vectors and their associated energy intensity.

[0170] By feeding back at least one CSI information, the terminal can indicate to the network the beam direction with strong interference and the reference signal with strong interference. Furthermore, the network can adjust the precoding matrix information through at least one CSI information fed back by the terminal so that the average SINR of the system is further improved, thereby further improving the transmission capacity and reducing energy consumption.

[0171] Embodiment 2

[0172] In this embodiment, when the terminal uses at least one reference signal to obtain at least one CSI information, the terminal may additionally feed back some information to the network to facilitate the network to configure the terminal to use at least one reference signal to obtain at least one CSI information. The additional feedback information includes at least one of the following:

[0173] 1) The terminal feeds back the granularity of interference CSI information supported by the terminal. For example, if the network configures the terminal to feed back interference CSI information including PMI and / or CQI, then for the granularity of PMI and / or CQI, the terminal can feed back the granularity it supports, to prevent the network from configuring a granularity that the terminal does not support;

[0174] 2) The terminal feedbacks whether it supports feedback of interference CSI information. For example, if the terminal cannot calculate the service CSI and the interference CSI at the same time, it needs to feedback to the network that it does not support obtaining interference CSI information to prevent the network from configuring the terminal to obtain interference CSI information;

[0175] 3) The terminal feeds back the number of interference CSI information supported for measurement. For example, if the terminal cannot measure more than N interference CSI information, it needs to feed back the maximum number of interference CSI information supported for measurement to the network to prevent the network from configuring too much interference CSI information measurement;

[0176] 4) The terminal feeds back the number of interference CSI information that it supports. For example, if the terminal cannot feed back more than N interference CSI information, it needs to feed back the maximum number of interference CSI information that it supports to the network to prevent the network from configuring too much interference CSI information feedback;

[0177] 5) The content of the interference CSI information supported by the terminal feedback. For example, for interference CSI information, the terminal can only support feedback of CBSR information, so it is necessary to feedback the interference CSI information supported by the terminal to the network to prevent the network from configuring CSI information that the terminal cannot obtain;

[0178] 6) The terminal feedbacks whether it supports the inclusion of target indication in the interference CSI information. For example, for the interference CSI information, the terminal can only feedback the interference beam information, but cannot feedback the energy information of the corresponding beam. In this case, it is necessary to feedback to the network whether the terminal supports the inclusion of target indication in the interference CSI information. The simulation network is configured with CSI information that the terminal cannot obtain.

[0179] Embodiment 3

[0180] In this embodiment, the terminal using at least one reference signal to obtain at least one CSI information may also include the terminal selecting at least one reference signal to obtain service CSI information, and / or the terminal selecting at least one reference signal to obtain interference CSI information.

[0181] Further, optionally, the terminal indicates to the network, through the CSI report, a reference signal associated with the service CSI information fed back by the terminal. For example, the terminal indicates the reference signal associated with the service CSI information fed back by the terminal in part 1 of the CSI report. For another example, when the amount of service CSI information selected for feedback by the terminal is a network configuration, the terminal may indicate the reference signal associated with the service CSI information fed back by the terminal in part 2 of the CSI report.

[0182] Further, optionally, the terminal indicates to the network, through the CSI report, a reference signal associated with the interference CSI information fed back by the terminal. For example, the terminal indicates the reference signal associated with the interference CSI information fed back by the terminal in Part 1 of the CSI report. For another example, when the number of interference CSI information selected for feedback by the terminal is a network configuration, the terminal may indicate the reference signal associated with the service CSI information fed back by the terminal in Part 2 of the CSI report.

[0183] For example, the network configures K reference signals for obtaining interference CSI information (or service CSI information), the terminal measures K reference signals, selects M reference signals from them, and feeds back the interference CSI information (or service CSI information) associated therewith. At this time, the terminal also needs to carry indication information in the CSI report for the network to obtain the number of interference CSI information (or the number of service CSI information) fed back by the terminal and the M reference signals associated therewith. Optionally, a simple way is for the terminal to feed back a bit sequence of length K, in which each bit is associated with a reference signal for obtaining interference CSI information (or service CSI information). If the terminal feeds back M reference signals, then there are M bits in the K bits that are 1, and the other bits are 0. Optionally, another implementation method is for the terminal to feed back a combination number, and the network obtains the M reference signals selected by the terminal by parsing the combination number. The size of the combination number is related to K and M.

[0184] For example, the network configures K reference signals for obtaining the CSI information of the interfering cell, the terminal measures the K reference signals, selects M (positive integer) reference signals from them, and feeds back the service CSI information associated therewith. For the remaining KM reference signals, the terminal selects part or all of the reference signals and feeds back the interference CSI information associated therewith. At this time, the terminal also needs to carry indication information in the CSI report for the network to obtain the number of interference CSI information fed back by the terminal and the reference signal associated therewith. Optionally, a simple way is that the terminal feeds back a bit sequence of length K, wherein each bit is associated with a reference signal for obtaining CSI information, wherein M bits are 1 to indicate the reference signal associated with M service CSI information. Further, optionally, the terminal feeds back a bit sequence of length KM, wherein each bit is associated with a reference signal for obtaining user interference CSI information. Another simple way is that the terminal feeds back a bit sequence, which is associated with a combination number or a value, by which the reference signal associated with M service CSI information can be determined. Optionally, the terminal feeds back a bit sequence of length KM, in which each bit is associated with a reference signal for obtaining user interference CSI information, or the terminal feeds back another bit sequence, which is associated with a combination number or a value, through which the reference signal associated with the interference CSI information fed back by the terminal can be determined.

[0185] Optionally, whether the terminal can select part of the reference signal to obtain at least one CSI information, or whether the terminal can feed back CSI information obtained by using part of the reference signal is configured by network high-layer signaling.

[0186] Further, the network can limit the selection range of the terminal to select part of the reference signal to obtain CSI information through high-level signaling. Optionally, the reference signal is divided into at least one reference signal group, and the terminal uses at least one reference signal group to obtain at least one service CSI information or interference CSI information. For example, the network configures 4 CSI-RS and divides the 4 CSI-RS into 2 groups through high-level signaling. The terminal uses the first group of CSI-RS to select part or part of the CSI-RS, and feeds back the obtained service CSI information, and uses the second group of CSI-RS to select part or all of the CSI-RS, and feeds back the obtained interference CSI information. Further, optionally, at this time, the terminal only needs to indicate to the network which reference signal or signals within the selection range the fed-back CSI information is associated with. For example, for the above example, assuming that there are 2 CSI-RS in the first group, the terminal only needs to indicate which CSI-RS of the 2 CSI-RS is associated with the fed-back service CSI information.

[0187] Another implementation manner is: the terminal uses at least one reference signal to obtain at least one service CSI information and / or interference CSI information. Further, the terminal can select part of the service CSI information and / or part of the interference CSI information to feed back to the network. For example, the network configures K reference signals for obtaining service CSI information (or interference CSI information), the terminal receives K reference signals respectively, and selects N1 service CSI information (or interference CSI information) to feed back to the network, N1<=K, where N1 service CSI information is associated with N1 reference signals. For another example, the network configures K reference signals, where K1 reference signals are used to obtain service CSI information, and the remaining reference signals are used to obtain interference CSI information, then the terminal measures K1 reference signals, and selects N1 service CSI information to feed back to the network, N1<=K1, and N1 service CSI information is associated with N1 reference signals. Further, the terminal measures K-K1 reference signals, and selects M1 interference CSI information to feed back to the network, M1<=K-K1, and M1 interference CSI information is associated with M1 reference signals.

[0188] Another implementation manner is: the terminal uses at least one reference signal group to obtain at least one service CSI information and / or interference CSI information. Further, for each reference signal group, the terminal can select part of the service CSI information and / or part of the interference CSI information to feed back to the network. For example, the network configures 2 reference signal groups for obtaining service CSI information, wherein each reference signal group includes multiple reference signals, and the terminal measures the reference signal of each reference signal group. For a certain reference signal group, the terminal selects up to N service CSI information to feed back to the network, wherein N may be a parameter configured by the network. For example, the network configures 2 reference signal groups for obtaining interference CSI information, wherein each reference signal group includes K reference signals, and the terminal measures the reference signal of each reference signal group. For each reference signal group, the terminal selects up to N interference CSI information to feed back to the network, wherein N may be a parameter configured by the network. For example, the network configures 2 reference signal groups for obtaining service CSI information and interference CSI information, wherein each reference signal group includes K reference signals, and the terminal measures the reference signal of each reference signal group. For each reference signal group, the terminal selects up to N service CSI information to feed back to the network, and N service CSI information is associated with N reference signals, where N can be a parameter configured by the network. For the remaining KN reference signals of each reference signal group, the terminal selects up to M reference signals and feeds back M interference CSI information. For example: the network configures 2 reference signal groups for obtaining service CSI information and interference CSI information, wherein each reference signal group includes K reference signals, and the terminal measures the reference signal of each reference signal group. For each reference signal group, the network indicates or the terminal obtains N reference signals through rules for obtaining service CSI information. Optionally, the terminal selects one or more service CSI information to feed back to the network, and each service CSI information is associated with one reference signal. For the remaining KN reference signals of each reference signal group, the terminal selects M reference signals and feeds back M interference CSI information, where M is an integer.

[0189] Another implementation method: The terminal uses at least one reference signal group to obtain at least one service CSI information or interference CSI information. Further, the service CSI information and the interference CSI information form a service-interference pair. For each reference signal group, the terminal can select multiple service-interference pairs of associated CSI information to feed back to the network. For example, the network configures a reference signal group or a reference signal set, wherein the set includes K reference signals. Assuming that the terminal selects the i-th reference signal for obtaining the service CSI information, then for the remaining reference signals, the terminal is used to obtain the interference CSI information, and at this time, the interference CSI information and the service CSI information form a pair of service-interference pairs. Further, the terminal selects the j-th reference signal for service CSI information acquisition according to the network instruction or its own capability or its own implementation. For the remaining reference signals, the terminal is used to obtain the interference CSI information, and at this time, the interference CSI information and the service CSI information form another pair of service-interference pairs. The terminal feeds back the CSI information associated with these two pairs of service-interference pairs to the network. This increases the flexibility of the network.

[0190] Embodiment 4

[0191] In this embodiment, at least one of the reference signals is used to obtain interference CSI information, and the reference signal used to obtain interference CSI information may be a reference signal configured by the network as a channel measurement. At this time, the network may have multiple configuration methods, including at least one of the following methods:

[0192] Method 1: The network configures a reference signal set of channel measurement CSI-RS, which includes CSI-RS used to obtain interference CSI information;

[0193] Mode 2: The network configures multiple reference signal sets for channel measurement CSI-RS, where one or more reference signal sets are used to obtain interference CSI information;

[0194] Mode 3: The network configures a reference signal set of a channel measurement CSI-RS, which includes multiple reference signal groups, one or more of which are used to obtain interference CSI information;

[0195] For the above-mentioned method 1, if there is a CSI-RS for obtaining the serving CSI information in the set, the network needs to inform the terminal through signaling which reference signals are used to obtain the serving CSI information and which reference signals are used to obtain the interference CSI information, including at least one of the following:

[0196] 1. The network indicates the reference signals associated with the interference CSI information through high-level signaling. Optionally, the terminal assumes that the remaining reference signals in the set are used to obtain the service CSI information;

[0197] 2. The network indicates the reference signals associated with the service CSI information through high-level signaling. Optionally, the terminal assumes that the remaining reference signals in the set are used to interfere with the acquisition of CSI information;

[0198] For the above-mentioned method 2, the network indicates the reference signal set associated with the interference CSI information through high-layer signaling, or the terminal assumes that the first or last reference signal set is used to obtain the interference CSI information or the serving CSI information.

[0199] For mode 3, the network indicates the reference signal group associated with the interference CSI information through high-layer signaling, or the terminal assumes that the first or last reference signal group is used to obtain the interference CSI information or the serving CSI information.

[0200] The reference signal used to obtain the interference CSI information may also be a reference signal configured by the network as an interference measurement. At this time, the interference measurement reference signal terminal associated with the interference CSI information does not assume that each measurement port is associated with a transmission layer. Optionally, after the terminal obtains the interference CSI information using the interference measurement reference signal, when the terminal calculates the CQI, the interference measurement reference signal is not used to calculate the interference power.

[0201] Furthermore, there may be at least one reference signal used for both obtaining interference CSI information and obtaining service CSI. Optionally, some ports of the reference signal used for both obtaining interference CSI information and obtaining service CSI information are used for obtaining service CSI information, and some ports are used for obtaining interference CSI information.

[0202] Embodiment 5

[0203] In this embodiment, before the terminal receives the reference signal used to obtain the CSI of the interfering cell, the terminal may also determine the receiving parameters of the terminal according to the high-layer signaling or the default rule.

[0204] Method 1: The network indicates, through high-level signaling, the associated receiving parameters or target information for each reference signal used to obtain the CSI of the interfering cell. The target information includes but is not limited to at least one of the following: timing information, quasi-co-location information, spatial relationship information, spatial parameter information, frequency domain relationship information, frequency domain parameter information, average delay information, delay spread information, time domain relationship information, time domain parameter information, average Doppler information, Doppler spread information, and power information.

[0205] Furthermore, the terminal expects or assumes that the reference signals associated with all interfering cell CSI information are associated with the same reception parameters or target information, for example, all interfering cell CSI information is associated with the same TCI or is associated with the same QCL-Type D type reference signal.

[0206] Or, further, when the network configures multiple reference signals for serving cell CSI acquisition, for the reference signal for obtaining the interfering cell CSI information associated with the same reference signal for obtaining the serving cell CSI, the terminal assumes or expects to be associated with the same reception parameters or target information. At this time, the reference signal associated with the interfering CSI information may not be completely associated with the same target information. For example: the network indicates through high-level signaling that the first serving reference signal (used to obtain serving CSI information) corresponds to the first interference reference signal (used to obtain interference CSI information) and the third interference reference signal (used to obtain interference CSI information), then the terminal assumes that the network configures the first interference reference signal and the third interference reference signal to be associated with the same target information or TCI information or to be associated with the same QCL-Type D type of reference signal.

[0207] Mode 2: The terminal determines the reception parameter or target information of each reference signal used to obtain the CSI information of the interfering cell based on a default rule. The default rule may be that the target information is obtained by an associated reference signal used to obtain the CSI information of the serving cell.

[0208] For example, when the network configures one reference signal for obtaining the serving cell CSI information, the terminal assumes that the reception parameters or target information of all reference signals used to obtain the interfering cell CSI information are the same as the reference signal used to obtain the serving cell CSI information.

[0209] For another example, the network indicates through high-layer signaling that the first serving cell reference signal corresponds to the first interfering cell reference signal and the third interfering cell reference signal, then the terminal assumes that the receiving parameters or target information associated with the first interfering cell reference signal and the third interfering cell reference signal are the same as the first serving cell reference signal.

[0210] For another example, when the network configures multiple reference signals for obtaining the serving cell CSI information, the terminal assumes that the receiving parameters or target information of all reference signals used to obtain the serving cell CSI information are the same, and the terminal assumes that the receiving parameters or target information of all reference signals used to obtain the interfering cell CSI information are the same as the reference signal used to obtain the serving cell CSI information.

[0211] When the network configures multiple reference signals for obtaining service CSI information and interference CSI information, the terminal first receives a reference signal group for obtaining service CSI information, and selects at least one service reference signal from it for feedback of service CSI information. Furthermore, for the reference signal used to obtain interference CSI information, its associated target information is obtained by the reference signal selected by the terminal for obtaining service CSI information. Optionally, the association relationship between the interference reference signal and the service reference signal can be obtained through network indication or default rules. Optionally, the time interval between the first interference reference signal and the first or last service reference signal needs to meet the measurement capability of the terminal or the parameters agreed upon in the protocol.

[0212] For example, when the network configures two groups of reference signals for obtaining service CSI information and interference CSI information respectively, the terminal first receives the reference signal group for obtaining service CSI information, and selects a service reference signal therefrom for feeding back service CSI information. Further, for the reference signals in the reference signal group for obtaining interference CSI information, their associated target information is obtained through the reference signal selected by the terminal for obtaining service CSI information, that is, for the reference signals in the reference signal group for obtaining interference CSI information, their target information is the same as the reference signal selected by the terminal for obtaining service CSI information.

[0213] Through the technical solution provided by the embodiment of the present application, by introducing the CSI information acquisition and feedback of the interference channel in the CSI report, the network can obtain more CSI information, which is further conducive to the network using the algorithm to manage interference, thereby effectively improving the system signal to noise ratio level and transmission performance.

[0214] The channel state information feedback method provided in the embodiment of the present application can be executed by a channel state information feedback device. In the embodiment of the present application, the channel state information feedback method performed by the channel state information feedback device is taken as an example to illustrate the channel state information feedback device provided in the embodiment of the present application.

[0215] Figure 5 A schematic diagram showing a structure of a device for feeding back channel state information according to an embodiment of the present application is shown as follows: Figure 5 As shown, the device 500 mainly includes: an acquisition module 501 and a feedback module 502.

[0216] In an embodiment of the present application, an acquisition module 501 is used to obtain at least one first-category channel state information CSI information and at least one second-category CSI information using at least one reference signal; a feedback module 502 is used to feed back a CSI report including at least one CSI information to a network side device, wherein the at least one CSI information includes at least one of the following: at least one first-category CSI information and at least one second-category CSI information.

[0217] In one implementation, the second type of CSI information includes at least one of the following:

[0218] Codebook subset restriction information, used to indicate to the network side device the beam directions available to the terminal, or used to indicate to the network side device the beam directions unavailable to the terminal;

[0219] second CSI information, wherein the second CSI information includes: at least one of PMI, CQI, RI, LI and CRI;

[0220] Partial information of precoding matrix;

[0221] Target indication, used to indicate energy information or power information.

[0222] In one implementation, the partial information of the precoding matrix includes: a part of basis vectors among a plurality of basis vectors associated with the precoding matrix.

[0223] In one implementation, the feedback module 502 is further configured to feedback at least one of the following to the network side device:

[0224] The granularity of the second type of CSI information supported by the terminal;

[0225] Indication information of whether the terminal supports feedback of second-category CSI information;

[0226] The amount of second type of CSI information supported by the terminal for measurement;

[0227] The amount of second type of CSI information supported by the terminal for feedback;

[0228] Content included in the second type of CSI information supported by the terminal;

[0229] Whether the terminal supports the indication information including the target indication in the second type of CSI information.

[0230] In one implementation, the second type of CSI information fed back is wideband CSI information by default.

[0231] In one implementation, the acquisition module 501 uses at least one reference signal to acquire at least one first type of channel state information CSI information, including: selecting at least one first reference signal to acquire at least one first type of CSI information; or, the acquisition module 501 uses at least one reference signal to acquire at least one second type of CSI information, including: selecting at least one second reference signal to acquire at least one second type of CSI information.

[0232] In one implementation, the CSI report further includes at least one of the following:

[0233] first indication information, where the first indication information is used to indicate a first reference signal associated with the first type of fed-back CSI information;

[0234] Second indication information, where the second indication information is used to indicate a second reference signal associated with the second type of CSI information fed back.

[0235] In one implementation, selecting at least one first reference signal to obtain at least one first-category CSI information includes:

[0236] The terminal selects the at least one first reference signal within a first selection range determined by a first high-layer signaling sent by a network-side device to obtain at least one first-type CSI information.

[0237] In one implementation, selecting at least one second reference signal to obtain at least one second-type CSI information includes:

[0238] The terminal selects the at least one second reference signal within a second selection range determined by second high-layer signaling sent by the network side device to obtain at least one second-type CSI information.

[0239] In one implementation, the reference signal associated with the second type of CSI information is a channel measurement reference signal indicated by a network side device.

[0240] In one implementation, the reference signal associated with the first-type CSI information and the reference signal associated with the second-type CSI information are reference signals in different reference signal groups or different reference signal sets.

[0241] In one implementation, the reference signal associated with the second type of CSI information is an interference measurement reference signal indicated by a network side device.

[0242] In one implementation, the at least one third reference signal associated with the second type of CSI information satisfies at least one of the following:

[0243] The at least one third reference signal is associated with the same target information;

[0244] The at least one third reference signal is associated with non-identical target information.

[0245] In one implementation, the target information includes at least one of the following information used by the terminal: timing information, quasi-co-location information, spatial relationship information, spatial parameter information, frequency domain relationship information, frequency domain parameter information, average delay information, delay spread information, time domain relationship information, time domain parameter information, average Doppler information, Doppler spread information, and power information.

[0246] In one implementation, the target information is used by the terminal to perform at least one of the following operations: channel estimation, demodulation of reference signals, demodulation of data, calibration of receiving parameters, calibration of receivers, determination of receiving parameters, and determination of receivers.

[0247] In one implementation, when the at least one third reference signal is associated with the same target information, the target information is determined by at least one of the following:

[0248] Default rules;

[0249] High-level signaling indication;

[0250] Media access control layer control unit MAC-CE indication;

[0251] Downlink control information DCI indication;

[0252] A reference signal associated with the first type of CSI information;

[0253] A reference signal selected by the terminal for obtaining the first type of CSI information.

[0254] In one implementation, the number of reference signals associated with the first-type CSI information is 1, or the number of reference signals associated with the first-type CSI information is greater than 1 and are associated with the same target information.

[0255] In one implementation, when the at least one third reference signal is associated with target information that is not completely the same, the target information associated with each of the third reference signals is determined by at least one of the following:

[0256] Default rules;

[0257] High-level signaling indication;

[0258] Media access control layer control unit MAC-CE indication;

[0259] DCI indication;

[0260] A reference signal associated with the third reference signal and used to obtain the first type of CSI information;

[0261] A reference signal selected by the terminal for obtaining the first type of CSI information.

[0262] In one implementation, when the target information associated with each of the third reference signals is determined by a reference signal associated with the third reference signal and used to obtain the first type of CSI information, the reference signal used to obtain the first type of CSI information satisfies at least one of the following:

[0263] The number of reference signals used to obtain the first type of CSI information is greater than 1;

[0264] The reference signal used to obtain the first type of CSI information is associated with the target information that is not completely the same.

[0265] In one implementation, in the case where the third reference signal is associated with a reference signal for obtaining the first type of CSI information, the acquisition module 501 acquires the reference signals for obtaining the first type of CSI information associated with each of the third reference signals through high-layer signaling or a default rule.

[0266] In one implementation, when the target information associated with each of the third reference signals is determined by a reference signal selected for obtaining the first type of CSI information, at least one of the following is satisfied:

[0267] The number of reference signals configured by the network side device for obtaining the first type of CSI information is greater than 1;

[0268] The number of reference signals selected by the terminal for obtaining the first type of CSI information is greater than or equal to 1;

[0269] The reference signal configured by the network side device for obtaining the first type of CSI information is associated with target information that is not completely the same.

[0270] In one implementation, the feedback module 502 is further configured to preferentially discard at least a portion of the at least one second-category CSI information when the CSI report cannot carry all of the at least one first-category CSI information and the at least one second-category CSI information.

[0271] The feedback device of the channel state information in the embodiment of the present application can 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 can be a terminal, or it can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of the present application.

[0272] The channel state information feedback device provided in the embodiment of the present application can achieve Figures 2 to 4 The various processes implemented by the terminal in the method embodiment achieve the same technical effect and are not described here to avoid repetition.

[0273] The channel state information acquisition method provided in the embodiment of the present application can be executed by a channel state information acquisition device. In the embodiment of the present application, the channel state information acquisition method performed by the channel state information acquisition device is taken as an example to illustrate the channel state information acquisition device provided in the embodiment of the present application.

[0274] Figure 6 A schematic diagram showing a structure of a device for acquiring channel state information provided in an embodiment of the present application is shown as follows: Figure 6 As shown, the device 600 mainly includes: a configuration module 601 and a receiving module 602.

[0275] In an embodiment of the present application, a configuration module 601 is used to configure at least one reference signal for a terminal, and indicate a reference signal for obtaining a first type of CSI information or a reference signal for obtaining a second type of CSI information in the at least one reference signal; a receiving module 602 is used to receive a CSI report fed back by the terminal, wherein the CSI report includes at least one CSI information, and the at least one CSI information includes at least one of the following: at least one of the first type of CSI information and at least one of the second type of CSI information.

[0276] In one implementation, the receiving module 602 is further configured to receive at least one of the following feedback from the terminal:

[0277] A granularity of the second type of CSI information supported by the terminal;

[0278] Indication information of whether the terminal supports feedback of second-category CSI information;

[0279] The amount of second type of CSI information supported by the terminal for measurement;

[0280] The amount of second type of CSI information supported by the terminal for feedback;

[0281] Content included in the second type of CSI information supported by the terminal;

[0282] Whether the terminal supports the indication information including the target indication in the second type of CSI information.

[0283] In one implementation, indicating a reference signal used to obtain the first type of CSI information or a reference signal used to obtain the second type of CSI information in the at least one reference signal includes at least one of the following:

[0284] Sending a first high-layer signaling to a terminal, where the first high-layer signaling instructs the terminal to select a first selection range of a first reference signal for acquiring the first-type CSI information;

[0285] A second high-layer signaling is sent to the terminal, where the second high-layer signaling instructs the terminal to select a second selection range of a second reference signal for acquiring the second-type CSI information.

[0286] In one implementation, the configuration module 601 is also used to configure or indicate target information to the terminal, and the target information includes at least one of the following information used by the terminal: timing information, quasi-co-location information, spatial relationship information, spatial parameter information, frequency domain relationship information, frequency domain parameter information, average delay information, delay spread information, time domain relationship information, time domain parameter information, average Doppler information, Doppler spread information, and power information.

[0287] In one implementation, the CSI report further includes at least one of the following:

[0288] first indication information, where the first indication information is used to indicate a first reference signal associated with the first type of fed-back CSI information;

[0289] Second indication information, where the second indication information is used to indicate a second reference signal associated with the second type of CSI information fed back.

[0290] In one implementation, the receiving module 602 is further used to determine a reference signal associated with the at least one CSI information included in the CSI report based on target indication information, where the target indication information includes at least one of the following: the first indication information and the second indication information.

[0291] In one implementation, the receiving module 602 is further configured to determine whether the CSI report includes the second-category CSI information according to the indication information fed back by the terminal of whether the feedback of the second-category CSI information is supported.

[0292] The channel state information acquisition device in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a network side device. For example, the network side device can include but is not limited to the types of network side devices 12 listed above. Other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0293] The channel state information acquisition device provided in the embodiment of the present application can achieve Figures 2 to 4 In the method embodiment, the various processes implemented by the network side device can achieve the same technical effect. To avoid repetition, they will not be described here.

[0294] like Figure 7 As shown, the embodiment of the present application also provides a communication device 700, including a processor 701 and a memory 702, and the memory 702 stores a program or instruction that can be run on the processor 701. For example, when the communication device 700 is a terminal, the program or instruction is executed by the processor 701 to implement the various steps of the embodiment of the feedback method of the above-mentioned channel state information, and can achieve the same technical effect. When the communication device 700 is a network side device, the program or instruction is executed by the processor 701 to implement the various steps of the embodiment of the acquisition method of the above-mentioned channel state information, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0295] 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 Or the steps in the method embodiment shown in 3. 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 8 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0296] The terminal 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809 and at least some of the components of a processor 810.

[0297] Those skilled in the art will appreciate that the terminal 800 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 810 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 8 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.

[0298] It should be understood that in the embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, and the graphics processing unit 8041 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 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. Other input devices 072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0299] In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 801 can transmit the data to the processor 810 for processing; in addition, the radio frequency unit 801 can send uplink data to the network side device. Generally, the radio frequency unit 801 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0300] The memory 809 can be used to store software programs or instructions and various data. The memory 809 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 809 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 809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0301] The processor 810 may include one or more processing units; optionally, the processor 810 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 810.

[0302] The processor 810 is configured to obtain at least one first type of channel state information CSI information and at least one second type of CSI information using at least one reference signal.

[0303] The radio frequency unit 801 is used to feed back a CSI report including at least one CSI information to the network side device, wherein the at least one CSI information includes at least one of the following: at least one of the first category CSI information and at least one of the second category CSI information.

[0304] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0305] 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 4 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.

[0306] Specifically, the embodiment of the present application also provides a network side device. Fig. 9 As shown, the network side device 900 includes: an antenna 91, a radio frequency device 92, a baseband device 93, a processor 94 and a memory 95. The antenna 91 is connected to the radio frequency device 92. In the uplink direction, the radio frequency device 92 receives information through the antenna 91 and sends the received information to the baseband device 93 for processing. In the downlink direction, the baseband device 93 processes the information to be sent and sends it to the radio frequency device 92. The radio frequency device 92 processes the received information and sends it out through the antenna 91.

[0307] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 93, which includes a baseband processor.

[0308] The baseband device 93 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig. 9 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 95 through a bus interface to call the program in the memory 95 to execute the network device operations shown in the above method embodiment.

[0309] The network side device may further include a network interface 96, which is, for example, a Common Public Radio Interface (CPRI).

[0310] Specifically, the network side device 900 of the embodiment of the present application further includes: instructions or programs stored in the memory 95 and executable on the processor 94, and the processor 94 calls the instructions or programs in the memory 95 to execute. Figure 6 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0311] 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 feedback 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.

[0312] 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.

[0313] 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 programs or instructions to implement the various processes of the above-mentioned channel state information feedback 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.

[0314] 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.

[0315] 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 feedback 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.

[0316] An embodiment of the present application also provides a channel state information feedback system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the channel state information feedback 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.

[0317] 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.

[0318] 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.

[0319] 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 feeding back channel state information, characterized in that: include: The terminal uses at least one reference signal to obtain at least one first-category channel state information CSI information and at least one second-category CSI information; The terminal feeds back a CSI report including at least one CSI information to the network side device, wherein the at least one CSI information includes at least one of the following: at least one of the first category CSI information and at least one of the second category CSI information.

2. The method according to claim 1, characterized in that: The second type of CSI information includes at least one of the following: Codebook subset restriction information, used to indicate to the network side device the beam directions available to the terminal, or used to indicate to the network side device the beam directions unavailable to the terminal; second CSI information, wherein the second CSI information includes: at least one of a precoding matrix indication PMI, a channel quality indication CQI, a rank indication RI, a layer indication LI, and a channel state information reference signal CRI; Partial information of precoding matrix; Target indication, used to indicate energy information or power information.

3. The method according to claim 2, characterized in that The partial information of the precoding matrix includes: a part of basis vectors among a plurality of basis vectors associated with the precoding matrix.

4. The method according to claim 2 or 3, characterized in that: Before the terminal feeds back at least one CSI information, the method further includes: The terminal feeds back at least one of the following to the network side device: A granularity of the second type of CSI information supported by the terminal; Indication information of whether the terminal supports feedback of second-category CSI information; The amount of second type of CSI information that the terminal supports measuring; The amount of second type of CSI information supported by the terminal for feedback; Content included in the second type of CSI information supported by the terminal; Whether the terminal supports the indication information including the target indication in the second type of CSI information.

5. The method according to any one of claims 1 to 3, characterized in that: The second type of CSI information fed back by the terminal is broadband CSI information by default.

6. The method according to any one of claims 1 to 5, characterized in that: The terminal uses at least one reference signal to obtain at least one first type of CSI information, including: the terminal selects at least one first reference signal to obtain at least one first type of CSI information; or The terminal uses at least one reference signal to acquire at least one second type of CSI information, including: the terminal selects at least one second reference signal to acquire at least one second type of CSI information.

7. The method according to claim 6, characterized in that The CSI report also includes at least one of the following: first indication information, where the first indication information is used to indicate a first reference signal associated with the first type of fed-back CSI information; Second indication information, where the second indication information is used to indicate a second reference signal associated with the second type of CSI information fed back.

8. The method according to claim 6, characterized in that The terminal selects at least one first reference signal to obtain at least one first-type CSI information, including: The terminal selects the at least one first reference signal within a first selection range determined by a first high-layer signaling sent by a network-side device to obtain at least one first-type CSI information.

9. The method according to claim 6, characterized in that The terminal selects at least one second reference signal to obtain at least one second-type CSI information, including: The terminal selects the at least one second reference signal within a second selection range determined by second higher layer signaling sent by the network side device to obtain at least one second-type CSI information.

10. The method according to any one of claims 1 to 9, characterized in that: The reference signal associated with the second type of CSI information is a channel measurement reference signal indicated by a network side device.

11. The method according to claim 10, characterized in that The reference signal associated with the first type of CSI information and the reference signal associated with the second type of CSI information are reference signals in different reference signal groups or different reference signal sets.

12. The method according to any one of claims 1 to 9, characterized in that: The reference signal associated with the second type of CSI information is an interference measurement reference signal indicated by a network side device.

13. The method according to any one of claims 1 to 12, characterized in that: The at least one third reference signal associated with the second type of CSI information satisfies at least one of the following: The at least one third reference signal is associated with the same target information; The at least one third reference signal is associated with non-identical target information.

14. The method according to claim 13, characterized in that The target information includes at least one of the following information used by the terminal: timing information, quasi-co-location information, spatial relationship information, spatial parameter information, frequency domain relationship information, frequency domain parameter information, average delay information, delay spread information, time domain relationship information, time domain parameter information, average Doppler information, Doppler spread information, and power information.

15. The method according to claim 13, characterized in that In the case where the at least one third reference signal is associated with the same target information, the target information is determined by at least one of the following: Default rules; High-level signaling indication; Media access control layer control unit MAC-CE indication; Downlink control information DCI indication; A reference signal associated with the first type of CSI information; A reference signal selected by the terminal for obtaining the first type of CSI information.

16. The method according to claim 15, characterized in that The number of reference signals associated with the first-type CSI information is 1, or the number of reference signals associated with the first-type CSI information is greater than 1 and are associated with the same target information.

17. The method according to claim 13, characterized in that In the case where the at least one third reference signal is associated with different target information, the target information associated with each of the third reference signals is determined by at least one of the following: Default rules; High-level signaling indication; Media access control layer control unit MAC-CE indication; DCI indication; A reference signal associated with the third reference signal and used to obtain the first type of CSI information; A reference signal selected by the terminal for obtaining the first type of CSI information.

18. The method according to claim 17, characterized in that In a case where the target information associated with each of the third reference signals is determined by a reference signal associated with the third reference signal and used to obtain the first-category CSI information, the reference signal used to obtain the first-category CSI information satisfies at least one of the following: The number of reference signals used to obtain the first type of CSI information is greater than 1; The reference signal used to obtain the first type of CSI information is associated with the target information that is not completely the same.

19. The method according to claim 17, characterized in that In case of a reference signal for obtaining the first-type CSI information associated with the third reference signal, the terminal obtains, through high-layer signaling or a default rule, reference signals for obtaining the first-type CSI information associated with each third reference signal.

20. The method according to claim 15 or 17, characterized in that In a case where the target information associated with each of the third reference signals is determined by a reference signal selected by the terminal for obtaining the first type of CSI information, at least one of the following is satisfied: The number of reference signals configured by the network side device for obtaining the first type of CSI information is greater than 1; The number of reference signals selected by the terminal for obtaining the first type of CSI information is greater than or equal to 1; The reference signal configured by the network side device for obtaining the first type of CSI information is associated with target information that is not completely the same.

21. The method according to any one of claims 1 to 20, characterized in that The terminal feeds back a CSI report including at least one CSI information to the network side device, including: In a case where the CSI report cannot carry all of the at least one first-category CSI information and the at least one second-category CSI information, the terminal preferentially discards at least part of the at least one second-category CSI information.

22. A method for acquiring channel state information, characterized in that: include: The network side device configures at least one reference signal for the terminal, and indicates a reference signal used to obtain the first type of CSI information or a reference signal used to obtain the second type of CSI information in the at least one reference signal; The network side device receives the CSI report fed back by the terminal, wherein the CSI report includes at least one CSI information, and the at least one CSI information includes at least one of the following: at least one of the first category CSI information and at least one of the second category CSI information.

23. The method according to claim 22, characterized in that Before the network side device configures at least one reference signal for the terminal, the method further includes: The network side device receives at least one of the following feedback from the terminal: A granularity of the second type of CSI information supported by the terminal; Indication information of whether the terminal supports feedback of second-category CSI information; The amount of second type of CSI information that the terminal supports measuring; The amount of second type of CSI information supported by the terminal for feedback; Content included in the second type of CSI information supported by the terminal; Whether the terminal supports the indication information including the target indication in the second type of CSI information.

24. The method according to claim 22, characterized in that The network side device indicates a reference signal for obtaining the first type of CSI information or a reference signal for obtaining the second type of CSI information in the at least one reference signal, including at least one of the following: The network side device sends a first high-layer signaling to the terminal, where the first high-layer signaling instructs the terminal to select a first selection range of a first reference signal for acquiring the first type of CSI information; The network side device sends a second high-layer signaling to the terminal, where the second high-layer signaling instructs the terminal to select a second selection range of a second reference signal for acquiring the second-type CSI information.

25. The method according to claim 22, characterized in that The method further comprises: The network side device configures or indicates target information to the terminal, and the target information includes at least one of the following information used by the terminal: timing information, quasi-co-location information, spatial relationship information, spatial parameter information, frequency domain relationship information, frequency domain parameter information, average delay information, delay spread information, time domain relationship information, time domain parameter information, average Doppler information, Doppler spread information, and power information.

26. The method according to claim 22, characterized in that The CSI report also includes at least one of the following: first indication information, where the first indication information is used to indicate a first reference signal associated with the first type of fed-back CSI information; Second indication information, where the second indication information is used to indicate a second reference signal associated with the second type of CSI information fed back.

27. The method according to claim 26, characterized in that After the network side device receives the CSI report fed back by the terminal, the method further includes: The network side device determines a reference signal associated with the at least one CSI information included in the CSI report based on target indication information, where the target indication information includes at least one of the following: the first indication information and the second indication information.

28. The method according to claim 23, characterized in that The method further comprises: The network-side device determines whether the CSI report includes the second-category CSI information according to the indication information fed back by the terminal of whether to support the feedback of the second-category CSI information.

29. The method according to claim 22, characterized in that The method further comprises at least one of the following: The network side device configures or indicates at least one of the following to the terminal: the amount of first-category CSI information included in the CSI report, and the amount of second-category CSI information included in the CSI report; The network side device configures or instructs the terminal at least one of the following: whether to select the first type of CSI information, and whether to select the second type of CSI information.

30. A channel state information feedback device, characterized in that: include: An acquisition module, configured to acquire at least one first type of channel state information CSI information and at least one second type of CSI information using at least one reference signal; A feedback module is used to feed back a CSI report including at least one CSI information to a network side device, wherein the at least one CSI information includes at least one of the following: at least one of the first category CSI information and at least one of the second category CSI information.

31. A device for acquiring channel state information, characterized in that: include: a configuration module, configured to configure at least one reference signal for the terminal, and indicate a reference signal used to obtain the first type of CSI information or a reference signal used to obtain the second type of CSI information in the at least one reference signal; A receiving module is used to receive the CSI report fed back by the terminal, wherein the CSI report includes at least one CSI information, and the at least one CSI information includes at least one of the following: at least one of the first category CSI information and at least one of the second category CSI information.

32. 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 feedback method as described in any one of claims 1 to 21 are implemented.

33. 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 channel state information as described in any one of claims 22 to 29 are implemented.

34. 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 feedback of channel state information as described in any one of claims 1 to 21, or implements the steps of the method for obtaining channel state information as described in any one of claims 22 to 29.

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