Channel state information transmission method and apparatus, terminal, and network side device

Abstract

The present application relates to the technical field of communications, and discloses a channel state information (CSI) transmission method and apparatus, a terminal, and a network side device. The CSI transmission method in embodiments of the present application comprises: CSI is determined on the basis of first information associated with a measurement pilot port group, and / or a terminal sends the CSI to a network side device, wherein the CSI comprises the first information associated with the measurement pilot port group. The first information comprises at least one of the following: a spatial domain beam index; a spatial domain beam differential index; a spatial domain beam differential phase; and indication information of the measurement pilot port group.

Description

Channel state information transmission method and device, terminal and network side equipment

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202411051985.0, filed on August 1, 2024, the disclosure of which is incorporated herein in its entirety as part of the present application. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and particularly relates to a channel state information transmission method, device, terminal and network side equipment. BACKGROUND

[0004] In the existing codebook design scheme, the terminal does not consider the position condition of a transmission reception point (TRP) or multiple antenna panels when reporting beam information. For example, the near-field spherical wave effect of a wireless channel corresponding to a super large antenna array can be degraded to a far-field wave by antenna panel splitting, so that each sub-panel corresponds to a wireless channel. At this time, the beam orientations associated with different sub-panels have strong correlation. Considering another scenario, multiple antenna panels are placed in a distributed architecture, but they still maintain a common normal line. Similarly, the beam orientations associated with different antenna panels are also correlated. If the terminal does not utilize the correlation information of the beams, but separately feeds back the beam information associated with each antenna panel, the CSI reporting content overhead will be increased. For another example, multiple antenna panels share the same beam base due to special placement (such as front and back overlapping placement to form a 3D-array architecture). Since the spatial positions of the antenna panels on the network side are relatively fixed, the phase difference between the panels corresponding to different beam bases is also basically fixed for a long period of time. If the terminal feeds back the fixed value of the phase difference between the antenna panels every time CSI is reported, the terminal reporting information overhead will also be large. SUMMARY

[0005] The embodiments of the present application provide a channel state information transmission method, device, terminal and network side equipment, which can solve the problem of large terminal CSI reporting overhead.

[0006] In a first aspect, a channel state information transmission method is provided, which is executed by a terminal, and the method comprises:

[0007] The terminal sends channel state information (CSI) to a network side equipment, wherein the CSI is determined according to first information associated with a measurement pilot port group, and / or the CSI comprises the first information associated with the measurement pilot port group.

[0008] The first information includes at least one of:

[0009] a spatial beam index;

[0010] a spatial beam differential index;

[0011] a spatial beam differential phase;

[0012] measurement pilot port group indication information.

[0013] In a second aspect, a channel state information transmission method is provided, which is executed by a network side device, and the method comprises:

[0014] The network side device receives CSI sent by a terminal, wherein the CSI is determined according to first information associated with a measurement pilot port group, and / or the CSI comprises the first information associated with the measurement pilot port group.

[0015] The first information includes at least one of:

[0016] a spatial beam index;

[0017] a spatial beam differential index;

[0018] a spatial beam differential phase;

[0019] measurement pilot port group indication information.

[0020] In a third aspect, a channel state information transmission apparatus is provided, which is applied to a terminal, and the apparatus comprises:

[0021] A first sending module is configured to send channel state information (CSI) to a network side device, wherein the CSI is determined according to first information associated with a measurement pilot port group, and / or the CSI comprises the first information associated with the measurement pilot port group.

[0022] The first information includes at least one of:

[0023] a spatial beam index;

[0024] a spatial beam differential index;

[0025] a spatial beam differential phase;

[0026] measurement pilot port group indication information.

[0027] In a fourth aspect, a channel state information transmission apparatus is provided, which is applied to a network side device, and the apparatus comprises:

[0028] receive, from a terminal, channel state information (CSI), wherein the CSI is determined according to first information associated with a measured pilot port group, and / or the CSI comprises the first information associated with the measured pilot port group.

[0029] The first information comprises at least one of:

[0030] a spatial domain beam index;

[0031] a spatial domain beam differential index;

[0032] a spatial domain beam differential phase;

[0033] measured pilot port group indication information.

[0034] In a fifth aspect, a channel state information transmission apparatus is provided, which is configured to perform the steps of the method according to the first aspect, or implement the steps of the method according to the second aspect.

[0035] In a sixth aspect, a terminal is provided, which comprises a processor and a memory, the memory storing programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the first aspect.

[0036] In a seventh aspect, a terminal is provided, which comprises a processor and a communication interface, wherein the communication interface is configured to: send, to a network side device, channel state information (CSI), wherein the CSI is determined according to first information associated with a measured pilot port group, and / or the CSI comprises the first information associated with the measured pilot port group; and the first information comprises at least one of: a spatial domain beam index; a spatial domain beam differential index; a spatial domain beam differential phase; and measured pilot port group indication information.

[0037] In an eighth aspect, a network side device is provided, which comprises a processor and a memory, the memory storing programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the second aspect.

[0038] In a ninth aspect, a network side device is provided, which comprises a processor and a communication interface, wherein the communication interface is configured to: receive, from a terminal, channel state information (CSI), wherein the CSI is determined according to first information associated with a measured pilot port group, and / or the CSI comprises the first information associated with the measured pilot port group; and the first information comprises at least one of: a spatial domain beam index; a spatial domain beam differential index; a spatial domain beam differential phase; and measured pilot port group indication information.

[0039] In a tenth aspect, a readable storage medium is provided, and the readable storage medium stores a program or instructions, which, when executed by a processor, implement steps of the method according to the first aspect or implement steps of the method according to the second aspect.

[0040] In an eleventh aspect, a wireless communication system is provided, and the wireless communication system includes a terminal and a network-side device, the terminal is configured to implement steps of the method according to the first aspect, and the network-side device is configured to implement steps of the method according to the second aspect.

[0041] In a twelfth aspect, a chip is provided, and the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the method according to the first aspect or implement the method according to the second aspect.

[0042] In a thirteenth aspect, a computer program / program product is provided, and the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement steps of the channel state information transmission method according to the first aspect or implement steps of the channel state information transmission method according to the second aspect.

[0043] In a fourteenth aspect, a computer program product is provided, and the computer program product includes computer instructions, which, when executed by a processor, implement steps of the channel state information transmission method according to the first aspect or implement steps of the channel state information transmission method according to the second aspect.

[0044] In the embodiments of the present application, when a terminal reports CSI to a network-side device, the terminal reports CSI based on first information associated with a measured pilot port group, for example, one or more of a spatial domain beam index, a spatial domain beam differential index, a spatial domain beam differential phase, and measured pilot port group indication information. The terminal determines CSI based on the first information such as the beam differential index and the beam differential phase, or reports the first information such as the beam differential index and the beam differential phase in the CSI, which can avoid separately feeding back index information or phase information for each TRP or each beam, and effectively reduce feedback overhead. BRIEF DESCRIPTION OF DRAWINGS

[0045] FIG. 1 is a structural schematic diagram of a wireless communication system;

[0046] FIG. 2 is a flow schematic diagram of a channel state information transmission method according to an embodiment of the present application;

[0047] FIG. 3 is a schematic diagram of an antenna panel;

[0048] FIG. 4 is a diagram illustrating a measurement pilot port group and a corresponding reference port group according to an embodiment of the present application;

[0049] FIG. 5 is a flow diagram illustrating a method for transmitting channel state information according to an embodiment of the present application;

[0050] FIG. 6 is a diagram illustrating a structure of a device for transmitting channel state information according to an embodiment of the present application;

[0051] FIG. 7 is a diagram illustrating a structure of a device for transmitting channel state information according to an embodiment of the present application;

[0052] FIG. 8 is a diagram illustrating a structure of a communication device according to an embodiment of the present application;

[0053] FIG. 9 is a diagram illustrating a structure of a terminal according to an embodiment of the present application;

[0054] FIG. 10 is a diagram illustrating a structure of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of the present application.

[0056] The terms "first", "second", and the like in 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 can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" are usually a category, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, the protection scope of "A or B" at least covers three schemes, namely, scheme one: including A and not including B; scheme two: including B and not including A; scheme three: including A and B. In addition, the terms "A and / or B", "at least one of A and B", "at least one of A or B" also at least cover the above three schemes, respectively. The character " / " generally represents that the objects before and after are in an "or" relationship.

[0057] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). The direct indication can be understood as that the sender explicitly informs the receiver of specific information, operations to be performed or requested results, etc. in the sent indication. The indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or judges and determines the operations to be performed or the requested results according to the judgment result.

[0058] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, 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 in the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than the NR system, such as 6th Generation (6G) communication systems. th

[0059] ​FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothes, etc. The vehicle-mounted device can also be referred to as 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 embodiments of the present application. The network-side device 12 can include an access network device or a core network device. The access network device can also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc.The base station can 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 transmit / receive point (TRP), or some other suitable terminology in the art, and is not limited to a particular technical vocabulary, provided that the same technical effect is achieved. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0060] In the description of the embodiments of the present application, some concepts used in the following description are first explained.

[0061] I. Discrete Fourier Transform (DFT):

[0062] Considering the problem of precoding matrix indicator (PMI) feedback overhead, the Type II codebook uses the spatial domain basis vector W1 combination principle to design the codebook, and increases the frequency domain compression basis and the corresponding projection coefficient Where each transmission data stream codebook generation can be represented by the following formula:

[0063] Where:

[0064] Where i∈{0,1,…,L-1}, L represents the number of spatial domain basis vectors corresponding to each transmission data stream.

[0065] represents a DFT beam of dimension N1N2×1. Each beam vector is constructed by the Kronecker product of the vertical dimension DFT basis vector and the horizontal dimension DFT basis vector. The following is the generation formula of the beam basis.

[0066] N1 and N2 represent the associated horizontal dimension and associated vertical dimension CSI Reference Signal (CSI-RS) port numbers respectively. In order to improve the characterization accuracy, an upsampling coefficient is additionally introduced in the DFT basis vector formula: the horizontal dimension corresponds to parameter O1 and the vertical dimension corresponds to parameter O2.

[0067] The correspondence between the CSI-RS antenna port number, the associated horizontal dimension CSI-RS port number N1, the associated vertical dimension CSI-RS port number N2, the horizontal dimension corresponding parameter O1 and the vertical dimension corresponding parameter O2 is shown in Table 1 as follows.

[0068] Table 1: Antenna port number

[0069] Wherein, in the calculation formula of the above W1, the subscript The confirmation mode of is as follows:

[0070] Wherein, [q1, q2] is obtained according to i 1,1 , the calculation mode is

[0071] i 1,1 =[q1 q2]

[0072] q1∈{0,1,...,O1-1}

[0073] q2∈{0,1,…,O2-1}

[0074] [n1,n2] is obtained according to i 1,2 in the PMI, which can be obtained by analyzing the combination index i 1,2 L beam indexes to obtain [n1, n2]. The following is the analysis algorithm process:

[0075] Using this algorithm, the elements of i 1,2 and n2 in i 1,2 are found:

[0076] s -1 =0;

[0077] for i=0,…,L-1

[0078] Find the maximum x * ∈{L-1-i,…,N1N2-1-i}, such that i 1,2 -s i-1 ≥C(x * ,L-i);

[0079] e i = C(x * , L - i)

[0080] s i = s i-1 + e i

[0081] n (i) = N1N2-1-x *

[0082]

[0083] wherein C(x, y) is a combination formula in mathematics.

[0084] The channel state information transmission, apparatus, terminal and network side device provided by the embodiments of the present application are described in detail below in combination with the drawings and some embodiments and application scenarios.

[0085] As shown in FIG. 2, the present application provides a channel state information transmission method, executed by a terminal, comprising:

[0086] Step 201, the terminal sends channel state information (CSI) to a network side device, wherein the CSI is determined according to first information associated with a measured pilot port group, and / or the CSI includes the first information associated with the measured pilot port group.

[0087] The first information includes at least one of the following:

[0088] a spatial domain beam index;

[0089] a spatial domain beam differential index;

[0090] a spatial domain beam differential phase;

[0091] measured pilot port group indication information.

[0092] In this embodiment, the terminal can determine a plurality of valid measured pilot port groups based on a measured pilot configuration, and determine corresponding spatial domain beam index information based on each measured pilot port group. The terminal reports the CSI to the network side device, wherein the CSI can include one or more of the first information, or the information content in the CSI is determined according to the one or more first information.

[0093] For example, the terminal reports the CSI to the network side device, and the CSI includes S1 (S1 > 0) spatial beam index information and / or S2 (S2 > 0) spatial beam differential index information. Since the number of bits representing the spatial beam differential phase is smaller than the number of bits representing the absolute index of the beam, the reporting method avoids the need for the terminal to report the absolute index information of the beam associated with each measurement pilot port group when reporting the CSI, effectively saving network resources and reducing feedback overhead.

[0094] For another example, the terminal determines the information content in the CSI according to the spatial beam index and the spatial beam differential phase, and reports the CSI to the network side device. Considering that different measurement pilot port groups are associated with different network side antenna radio frequency unit groups, and the relative positions between different radio frequency unit groups are fixed during network deployment, there is a stable phase difference information (or phase rotation information) between different measurement pilot port groups on each spatial beam. The terminal can report the measured phase difference information aperiodically without periodically reporting the phase difference information, which can reduce the feedback overhead. At the same time, the terminal can also receive a network signaling indication, which carries the network pre-configured phase difference information. In this way, the terminal can further calculate the joint transmission CSI information under multiple TRPs / panels based on the received phase difference information, including codebook, rank, channel quality indicator (CQI), and other CSI information.

[0095] Optionally, the CSI reported by the terminal can also include measurement pilot port group indication information, which is used to indicate the measurement pilot port group associated with the CSI. For example, the network side device configures multiple measurement pilot port group indication information for the terminal, indicating multiple measurement pilot port grouping patterns. The terminal selects at least one matching measurement pilot port grouping indication information from the multiple patterns according to the actual channel state measured, and sends the selected pattern identifier to the network side device through the CSI. At the same time, the terminal can also calculate the CSI associated with the measurement pilot port group indication information of the selected pattern, including codebook, rank, CQI, and other CSI information, based on the selected pattern.

[0096] In the embodiments of the present application, when a terminal reports a CSI to a network side device, the terminal reports the CSI based on first information associated with a measurement pilot port group, for example, one or more of a spatial domain beam index, a spatial domain beam differential index, a spatial domain beam differential phase, measurement pilot port group indication information, etc. The terminal determines the CSI based on the first information such as the beam differential index and the beam differential phase, or reports the first information such as the beam differential index and the beam differential phase in the CSI, which can avoid separately feeding back index information or phase information for each TRP or each beam, and effectively reduce feedback overhead.

[0097] Optionally, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; and the spatial domain beam differential index associated with the measurement pilot port group is determined according to a first spatial domain beam index associated with the measurement pilot port group and a second spatial domain beam index associated with the reference measurement pilot port group.

[0098] In the embodiments, the measurement pilot port group is any one of the groups of measurement pilot ports after grouping, and each measurement pilot port group has a corresponding reference measurement pilot port group. The reference measurement pilot port group corresponding to each measurement pilot port group can be the same or different. The measurement pilot port group determines the spatial domain beam differential index and / or the spatial domain beam differential phase with reference to the reference measurement pilot port group.

[0099] In the embodiments, the spatial domain beam differential index is determined based on the spatial domain beam index associated with the measurement pilot port group itself and the spatial domain beam index associated with the reference measurement pilot port group. The determined spatial domain beam differential index has a smaller bit information relative to the spatial domain beam index associated with the measurement pilot port group itself, which can save the occupied resources.

[0100] It should be noted that in the embodiments of the present application, the first spatial domain beam index is the beam index associated with the measurement pilot port group, and the second spatial domain beam index is the beam index associated with the reference measurement pilot port group. The first spatial domain beam index and the second spatial domain beam index herein are only used to distinguish the beam index of the reference port group and the beam index of the non-reference port group, and do not specifically refer to a certain beam index. The first spatial domain beam differential index associated with the measurement pilot port group is determined based on the spatial domain beam index associated with the port group and the spatial domain beam index associated with the reference measurement pilot port group. For example, when a terminal reports a CSI, the CSI includes the spatial domain beam differential index corresponding to the measurement pilot port group and the spatial domain beam index corresponding to the reference measurement pilot port group corresponding to the measurement pilot port group.

[0101] For example, four measurement pilot port groups are included, i.e., port group 1, port group 2, port group 3, and port group 4. Assuming that port group 1, port group 2, and port group 3 take port group 4 as the reference measurement pilot port group, the beam indexes associated with port group 1, port group 2, and port group 3 all belong to the first spatial domain beam index, and the beam index associated with port group 4 belongs to the second spatial domain beam index. The first spatial domain beam differential index corresponding to the port group 1 is determined based on the spatial domain beam index of the port group 1 and the spatial domain beam index of the port group 4. The first spatial domain beam differential index corresponding to the port group 2 is determined based on the spatial domain beam index of the port group 2 and the spatial domain beam index of the port group 4. The first spatial domain beam differential index corresponding to the port group 3 is determined based on the spatial domain beam index of the port group 3 and the spatial domain beam index of the port group 4. In this example, the terminal needs to report the spatial domain beam index corresponding to the port group 4 and the first spatial domain beam differential index corresponding to the port group 1, the port group 2, and the port group 3, respectively. Based on the information reported by the terminal, the network side device can deduce the spatial domain beam index corresponding to the port group 1, the port group 2, and the port group 3, respectively.

[0102] For another example, four measurement pilot port groups are included, and the reference port group of the port group 2 is the port group 1, the reference port group of the port group 3 is the port group 2, and the reference port group of the port group 4 is the port group 3. The first spatial domain beam differential index corresponding to the port group 2 is determined based on the spatial domain beam index of the port group 2 and the spatial domain beam index of the port group 1. The first spatial domain beam differential index corresponding to the port group 3 is determined based on the spatial domain beam index of the port group 3 and the spatial domain beam index of the port group 2. The first spatial domain beam differential index corresponding to the port group 4 is determined based on the spatial domain beam index of the port group 4 and the spatial domain beam index of the port group 3. Although there are multiple reference port groups, the terminal still only needs to report the spatial domain beam index of one reference port group when reporting the CSI. In this example, the port group 1 is the final reference port group, and the terminal reports the spatial domain beam index of the port group 1 and the first spatial domain beam differential index corresponding to the port group 2, the port group 3, and the port group 4, respectively. Based on the information reported by the terminal, the network side device can deduce the spatial domain beam index corresponding to the port group 2, the port group 3, and the port group 4, respectively. For example, the network side device deduces the spatial domain beam index of the port group 2 based on the spatial domain beam index of the port group 1 and the first spatial domain beam differential index of the port group 2, deduces the spatial domain beam index of the port group 3 based on the deduced spatial domain beam index of the port group 2 and the first spatial domain beam differential index of the port group 3, and finally deduces the spatial domain beam index of the port group 4 based on the deduced spatial domain beam index of the port group 3 and the first spatial domain beam differential index of the port group 4.

[0103] Optionally, in the CSI reporting, any one of the measurement pilot port groups and the corresponding reference measurement pilot port group are respectively associated with L beams, and the terminal reports L spatial beam differential index information associated with each measurement pilot port group in addition to the L spatial beam index information associated with the reference measurement pilot port group. For example, L=3, the first spatial beam differential index information associated with the measurement pilot port group is determined based on the first spatial beam index associated with the measurement pilot port group and the first spatial beam index associated with the reference measurement pilot port group; the second spatial beam differential index information associated with the measurement pilot port group is determined based on the second spatial beam index associated with the measurement pilot port group and the second spatial beam index associated with the reference measurement pilot port group; and the third spatial beam differential index information associated with the measurement pilot port group is determined based on the third spatial beam index associated with the measurement pilot port group and the third spatial beam index associated with the reference measurement pilot port group. That is, the order of the L spatial beam differential index information associated with the measurement pilot port group and the order of the L spatial beam index associated with the reference measurement pilot port group are one-to-one associated.

[0104] As an optional embodiment, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; the spatial beam differential phase associated with the measurement pilot port group is determined based on phase information corresponding to a first spatial beam index associated with the measurement pilot port group and phase information corresponding to a second spatial beam index associated with the reference measurement pilot port group; and the first spatial beam index and the second spatial beam index are the same.

[0105] In this embodiment, the spatial beam differential phase associated with the measurement pilot port group is determined based on phase information corresponding to a first spatial beam index associated with the measurement pilot port group and phase information corresponding to a second spatial beam index associated with the reference measurement pilot port group. It should be noted that in this embodiment, the first spatial beam index and the second spatial beam index are the same, for example, the phase information of the same beam index in the two port groups is used to determine the beam differential phase. In this case, assuming that a plurality of measurement pilot port groups are associated with the same set of spatial beam indexes, for example, there are four measurement pilot port groups, and the four measurement pilot port groups are all associated with beam index 1, beam index 2, and beam index 3.

[0106] In this embodiment, the spatial beam differential phase is determined based on the phase corresponding to the spatial beam index associated with the measurement pilot port group itself and the phase corresponding to the spatial beam index associated with the reference measurement pilot port group. Compared with the phase information corresponding to each spatial beam index associated with the measurement pilot port group itself, the determined spatial beam differential phase occupies a smaller bit information, which can effectively save the occupied resources.

[0107] For example, when the terminal reports the CSI, the CSI includes the spatial beam differential phase corresponding to the measurement pilot port group and the spatial beam index corresponding to the reference measurement pilot port group corresponding to the measurement pilot port group. Alternatively, the terminal determines the information in the CSI according to the spatial beam differential phase corresponding to the measurement pilot port group and the spatial beam index corresponding to the reference measurement pilot port group corresponding to the measurement pilot port group.

[0108] For example, the reference measurement pilot port group of the port group 1 is the port group 2, the spatial beam index associated with the port group 1 includes the beam index 1, the beam index 2 and the beam index 3, and the spatial beam index associated with the port group 2 also includes the beam index 1, the beam index 2 and the beam index 3. When determining the spatial beam differential phase of the spatial beam 1 of the port group 1, the phase information of the beam index 1 associated with the port group 1 and the phase information of the beam index 1 associated with the port group 2 are used for determination. When determining the spatial beam differential phase of the spatial beam 2 of the port group 1, the phase information of the beam index 2 associated with the port group 1 and the phase information of the beam index 2 associated with the port group 2 are used for determination. When determining the spatial beam differential phase of the spatial beam 3 of the port group 1, the phase information of the beam index 3 associated with the port group 1 and the phase information of the beam index 3 associated with the port group 2 are used for determination.

[0109] Optionally, the phase information of each beam associated with the reference measurement pilot port group is 0 by default, that is, e j0 = 1.

[0110] As an optional embodiment, the method further includes receiving second information sent by the network side device, and the second information includes the information of the spatial beam differential phase.

[0111] In this embodiment, the spatial beam differential phase can be configured by the network side device. The second information can be sent by the network side device through a signaling. For example, the terminal receives a first signaling configured by the network side device, and the first signaling carries the differential phase information of the basis vector corresponding to at least one spatial beam absolute index. The terminal can determine the information in the CSI based on the spatial beam differential phase configured by the network side device and other information (such as the spatial beam index). In this case, the network side device configures the spatial beam differential phase, so that the terminal does not need to determine the spatial beam differential phase by itself, and does not need to periodically report the spatial beam differential phase, thereby reducing the feedback overhead.

[0112] For another example, the terminal receives a second signaling configured by the network side device, and the second signaling can be an aperiodic CSI report. The terminal reports at least one spatial information in the CSI, and the spatial information includes a spatial beam index and the T p> 0 spatial beam differential phase information, the T p The T p The T p The T

[0113] Optionally, the measurement pilot port group and the reference measurement pilot port group satisfy a first condition.

[0114] The first condition includes at least one of the following:

[0115] 1) Common normal; optionally, the measurement pilot port group and the corresponding reference measurement pilot port group can be included in a set, and the network side device can indicate that the measurement pilot port group and the reference measurement pilot port group included in the same set are common normal. The spatial beam differential information and / or spatial beam phase information can be calculated between the measurement pilot port group and the reference measurement pilot port group included in the same set. The spatial beam differential information or the spatial beam phase information is independently calculated between different sets.

[0116] 2) Configured or indicated to determine the spatial beam differential index; optionally, the network configures different measurement pilot port group sets, and the measurement pilot port group and the reference measurement pilot port group in the same set are configured or indicated by the network side device to determine the spatial beam differential index. The spatial beam differential index information is independently calculated between different sets.

[0117] 3) Configured or indicated to determine the spatial beam differential phase; optionally, the network configures different measurement pilot port group sets, and the measurement pilot port group and the reference measurement pilot port group in the same set are configured or indicated by the network side device to determine the spatial beam differential phase. The spatial beam differential phase information is independently calculated between different sets.

[0118] 4) The number of included measurement pilot ports is the same in the same spatial dimension; for example, in the first spatial dimension, the first measurement pilot port group and the reference measurement pilot port group have the same number of measurement pilot ports And / or, in the second spatial dimension, the first measurement pilot port group and the reference measurement pilot port group have the same number of measurement pilot ports Wherein the first spatial dimension and the second spatial dimension correspond to the horizontal dimension and the vertical dimension of the antenna panel respectively.

[0119] 5) have the same Quasi co-location (QCL); optionally, the measurement pilot port group and the corresponding reference measurement pilot port group are configured or indicated by the network side device to have the same QCL relationship.

[0120] 6) have the same number of corresponding spatial domain beams; optionally, the measurement pilot port group and the corresponding reference measurement pilot port group each have the same number of corresponding (or associated) spatial domain beams.

[0121] In the embodiments of the present application, the measurement pilot port group and the corresponding reference measurement pilot port group satisfy one or more of the above first conditions, and it can also be understood that any measurement pilot port group and its corresponding reference measurement pilot port group satisfy one or more of the above first conditions. When determining the spatial domain beam differential index and / or spatial domain beam differential phase of the measurement pilot port group, the port group satisfying the above first condition needs to be used as the reference measurement pilot port group.

[0122] In this embodiment, by calculating the beam differential index and / or beam differential phase for multiple port groups having a strong correlation relationship (such as satisfying the above first condition) in the spatial domain, the beam index and / or phase can be reported for each beam to determine the CSI or report the CSI, thereby reducing the feedback overhead.

[0123] As an optional embodiment, the first spatial domain beam index and the second spatial domain beam index are single-dimensional spatial domain beam indexes.

[0124] Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimensional spatial domain beam indexes.

[0125] In this embodiment, the first spatial domain beam index and the second spatial domain beam index used to calculate the spatial domain beam differential index and / or spatial domain beam differential phase can be single-dimensional spatial domain beam indexes or multi-dimensional spatial domain beam indexes. Among them, the single-dimensional first spatial domain beam index and the second spatial domain beam index can be used to determine the first differential index; the multi-dimensional first spatial domain beam index and the second spatial domain beam index can be used to determine the second differential index.

[0126] The single dimension is, for example, a first spatial dimension or a second spatial dimension, such as a horizontal dimension or a vertical dimension. For example, the first spatial domain beam index and the second spatial domain beam index can be horizontal dimension beam indexes, or the first spatial domain beam index and the second spatial domain beam index can be vertical dimension beam indexes.

[0127] The multi-dimension is, for example, a combination of a first spatial dimension and a second spatial dimension, for example, a combination of a horizontal dimension or a vertical dimension. For example, the first spatial domain beam index and the second spatial domain beam index are indexes determined in combination of a horizontal dimension associated spatial domain beam index and a vertical dimension associated spatial domain beam index.

[0128] In this embodiment, the single-dimension spatial domain beam index can be used to determine the beam difference index and / or the beam difference phase associated with each port group when the antenna panel is grouped in a single dimension, and the multi-dimension spatial domain beam index can be used to determine the beam difference index and / or the beam difference phase associated with each port group when the antenna panel is grouped in a multi-dimension. The method for determining the spatial domain beam difference index and / or the spatial domain beam difference phase under different grouping modes is provided, and the implementation process is more flexible. For example, in the case where the first spatial domain beam index and the second spatial domain beam index are first spatial dimension spatial domain beam indexes, the first spatial domain beam index and the second spatial domain beam index can include at least one of the following:

[0129] In the first spatial dimension, an up-sampling index of a Discrete Fourier Transform (DFT) basis vector, denoted as index q1; the up-sampling index of the DFT basis vector is a value having a functional relationship with an up-sampling multiple.

[0130] In the first spatial dimension, an index of a DFT basis vector, denoted as index n1;

[0131] In the first spatial dimension, an index determined based on a combination of the up-sampling index and the DFT basis index, denoted as index m1; where m1=O1n1+q1, and O1 represents a DFT basis up-sampling multiple in the first spatial dimension.

[0132] For another example, in the case where the first spatial domain beam index and the second spatial domain beam index are second spatial dimension spatial domain beam indexes, the first spatial domain beam index and the second spatial domain beam index can include at least one of the following:

[0133] In the second spatial dimension, an up-sampling index of a DFT basis vector, denoted as index q2;

[0134] In the second spatial dimension, an index of a DFT basis vector, denoted as index n2;

[0135] In the second spatial dimension, an index determined based on a combination of the up-sampling index and the DFT basis index, denoted as index m2; where m2=O2n2+q2, and O2 represents a DFT basis up-sampling multiple in the second spatial dimension.

[0136] Optionally, if the first spatial beam index and the second spatial beam index are multi-dimensional spatial beam indices, the first spatial beam index and the second spatial beam index can be denoted as n. It refers to the number of pilot ports measured in the first spatial dimension.

[0137] Optionally, the spatial beam differential index includes at least one of the following:

[0138] (1) The first difference index is determined based on the first spatial beam index and the second spatial beam index of the single dimension.

[0139] For example, for the first spatial dimension, the first difference index may include at least one of the following:

[0140] In the first spatial dimension, the index q1 of the DFT basis vector upsampled associated with the measurement pilot port group, and the index q1 of the DFT basis vector upsampled associated with the reference measurement pilot port group. The difference index Δq1 between q1 and q1, where Δq1 can be either q1 or q1. The difference between q1 and q2; where q1 and q2 are the values ​​of q1 and q2. The value range is 0 to (01-1). The difference between the indices is calculated according to the following formula: mod represents the modulo operation.

[0141] In the first spatial dimension, the index n1 of the DFT basis vector associated with the measurement pilot port group and the index n1 of the DFT basis vector associated with the reference measurement pilot port group are... The difference index Δn1 between n1 and n2; Δn1 can be the difference index between n1 and n2. The difference between n1 and n2; where n1 and n2 are the same as n1 and n2. The range of values ​​is The calculation of the difference between the indices satisfies the following formula relationship: mod represents the modulo operation.

[0142] In the first spatial dimension, the index m1 associated with the measurement pilot port group, jointly determined by the upsampling index and the DFT base index, and the index associated with the reference measurement pilot port group, jointly determined by the upsampling index and the DFT base index. The difference index Δm1 between them. Δm1 can be m1 and... The difference between m1 and m2. The range of values ​​is The calculation of the index difference satisfies the following formula relationship: mod represents the modulo operation.

[0143] For example, for the second spatial dimension, the first difference index can include at least one of the following:

[0144] For the second spatial dimension, a difference index AQ2 between an index q2 of the DFT basis vector on which the measurement pilot port group is sampled and an index of the DFT basis vector on which the reference measurement pilot port group is sampled; AQ2 can be a difference between q2 and . Wherein q2 and take values in the range of 0~(O2-1). The calculation of the difference between the indexes satisfies the following formula relationship: mod represents the modulo operation.

[0145] For the second spatial dimension, a difference index AQ2 between an index q2 of the DFT basis vector on which the measurement pilot port group is sampled and an index of the DFT basis vector on which the reference measurement pilot port group is sampled; AQ2 can be a difference between q2 and . Wherein q2 and take values in the range of The calculation of the difference between the indexes satisfies the following formula relationship: mod represents the modulo operation.

[0146] For the second spatial dimension, a difference index AQ2 between an index q2 of the DFT basis vector on which the measurement pilot port group is sampled and an index of the DFT basis vector on which the reference measurement pilot port group is sampled; AQ2 can be a difference between q2 and . Wherein q2 and take values in the range of The calculation of the difference between the indexes satisfies the following formula relationship: mod represents the modulo operation.

[0147] (2) A second difference index is determined according to the first spatial domain beam index and the second spatial domain beam index of the multi-dimensional.

[0148] For example, the second difference index is determined according to the second index n of the measurement pilot port group and the second index of the reference measurement pilot port group. The second difference index can be denoted as AQ. AQ can be a difference between n and . Wherein n and take values in the range of The calculation of the difference between the indexes satisfies the following formula relationship mod represents a modulo operation.

[0149] The difference between any two indexes can be configured by network signaling or predefined by a protocol. The difference can be positive or negative, such as 2 bits representing four values {-2, -1, 0, 1} or another four values {-1, 0, 1, 2}. The difference can also be in the form of {<=-2, -1, 0, >=1} or {<=-1, 0, 1, >=2}, and so on.

[0150] As an optional embodiment, the method further comprises:

[0151] receiving one or more measurement pilot port group indication information sent by the network side device, each of the measurement pilot port group indication information being used to indicate grouping information of measurement pilot ports;

[0152] The measurement pilot port group indication information in the first information is measurement pilot port group indication information associated with the CSI.

[0153] In this embodiment, the network side device configures multiple measurement pilot port group indication information for the terminal, indicating multiple measurement pilot port grouping patterns. The terminal selects at least one matched measurement pilot port grouping indication information from the multiple patterns according to the actual channel state measured by the terminal, and sends the selected pattern identifier to the network side device through the CSI. Meanwhile, the terminal can further calculate the CSI associated with the measurement pilot port group indication information of the selected pattern, including codebook, Rank, CQI, and other CSI information. For example, the near-field spherical wave characteristics caused by a super large antenna can be made far-field by antenna panel splitting, that is, each split sub-panel has a smaller antenna aperture, and the near-field spherical wave characteristics disappear. At this time, the wireless channel corresponding to each sub-panel tends to be far-field. Different near-field spherical characteristics can be matched by introducing more splitting methods. In the communication protocol, each sub-panel is associated with different measurement pilot port groups, that is, different antenna panel splitting methods can correspond to different measurement pilot port group combination patterns in the protocol.

[0154] For example, the network side device configures one or more CSI-RS resources, and the total number of CSI-RS ports of the one or more CSI-RS resources is 256. The protocol can predefine or the network side device can indicate some pilot port group indication information, such as shown in Table 2:

[0155] Table 2: Pilot port group indication information

[0156] Four patterns of splitting the pilot port groups are defined in Table 2 above, M g and N g respectively represent the way of grouping pilot ports in vertical and horizontal dimensions of the antenna panel. For example, M g = 1 and N g = 1 means that the antenna panel does not group pilot ports, in which case there is no need to perform the index-differential feedback of the beam or the configuration or feedback based on the differential phase; M g = 1 and N g = 2 means that the antenna panel does not group pilot ports in the vertical dimension, but is divided into two pilot port groups in the horizontal dimension; M g = 2 and N g = 2 means that the antenna panel is divided into two pilot port groups in the vertical dimension, and is divided into two pilot port groups in the horizontal dimension, for a total of 2*2 = 4 pilot port groups; and so on M g = 2 and N g = 4 means that a total of 2*4 = 8 pilot port groups are divided.

[0157] The terminal selects at least one CSI corresponding to the matched pilot port group indication information from the four different pilot port group indication information in Table 2 based on the CSI-RS resource measurement, and reports it. For example: the terminal considers that the (2, 2, 8, 8) pilot port group grouping mode is suitable for the current CSI reporting, and the corresponding M g = 2 and n g = 2, the number of CSI-RS ports corresponding to each pilot port group is 8*4*2 = 64 (considering dual polarization), and the corresponding and The protocol can predefine the pilot port group with index n G = 0 as the reference measurement pilot port group, and the pilot port groups with indexes n G = 1, n g = 2, and n g = 3 as the measurement pilot port groups corresponding to the reference measurement pilot port group, wherein the indexes corresponding to different pilot port groups can be calculated based on the following formula:

[0158] n g = N g g2+g1 or n g = M g g1+g2.

[0159] wherein the value range of g1 is 0~(N g -1); the value range of g2 is 0~(M g -1). The reference measurement pilot port group is protocol-default with index n g= 0, the terminal can also determine the reference port group by itself, for example, the terminal determines the reference port group from the four pilot port groups and reports it to the network.

[0160] In the CSI reporting of the terminal, the second spatial beam index corresponding to the reference measurement pilot port group is reported. In addition, the terminal also needs to indicate the pilot port group indication information associated with the CSI to the network side device. For example, in Table 2, four different pilot port group indication information or patterns are included, and the terminal can indicate which pilot port group indication information is associated with the CSI reporting by 2 bits.

[0161] Further, even if the terminal determines the M g = 2 and n g = 2 pilot port group allocation mode, the terminal can also continue to indicate which pilot port groups are valid pilot port groups from the M g *n g = 4 pilot port groups through 4 bitmaps, for example, the wireless channel corresponding to part of the pilot port groups is very poor, and the terminal only feeds back the valid pilot port groups that do not participate in the calculation of the CSI information. The length of the bitmap can be variable, and the length is equal to the product of M g n g in the pilot port group indication selected by the terminal. The length of the bitmap can also be fixed, and the length is equal to the maximum value of the product of M g n g in different pilot port group indication information, for example, the maximum value in Table 2 is 8, and for 4 bitmap feedback, only the low 4 bits or the high 4 bits of the 8 bitmaps can be read.

[0162] The implementation process of the channel state information transmission method in the present application is illustrated below.

[0163] Example one,

[0164] For 6G multiple-input multiple-output (MIMO) technology, there are two potential directions discussed. Potential direction one: in the new frequency band (for example, 6GHz-15GHz), a larger scale of antenna panels is arranged to obtain better beam gain; potential direction two: through distributed remote antenna panels to improve the performance of MIMO joint transmission, the distributed remote antenna panels can be configured as coplanar or not coplanar, where coplanar refers to the same normal radiation direction of the antenna array in the three-dimensional coordinate system.

[0165] Whether the co-normal antenna panel is enlarged or the co-normal antenna panel is pulled away, it can cause the angle of the corresponding radiation path on different antennas on the antenna panel: the horizontal departure angle (Azimuth of Departure, AOD) / vertical departure angle (ZOD) is different, at this time it can be considered as a near-field spherical wave effect or a near-field spherical wave effect. In addition, considering that the base station antenna is arranged indoors, different scatterers will also appear spatial non-stationary effect due to the shielding effect of different areas of the antenna panel. Under the influence of these comprehensive effects, the co-normal one or more antenna panels are divided into multiple sub-panels, which can change the near-field problem into a far-field problem, and can change the spatial non-stationary problem into a stationary problem. In this way, the existing codebook design idea in 5G can be extended a little bit, which is convenient for smooth evolution of 6G standard.

[0166] Considering the co-normal scenario, the spatial beam direction between different sub-panels generally will not differ too much. For example, one of the channel paths is horizontally oriented at 30° away from the normal direction on sub-panel 1, and the orientation of the same channel path on adjacent sub-panel 2 or panel 3… may have a certain deviation near 30° away from the normal direction, but will not deviate much. Therefore, when the terminal feeds back the spatial beam index of different sub-panels on the CSI, the differential index feedback can be considered to reduce the feedback overhead.

[0167] In this embodiment, the different antenna ports on the antenna panel and the antenna panel partition are characterized by measuring pilot configuration.

[0168] In this example, the terminal can determine a plurality of effective measurement pilot port groups based on the measurement pilot configuration, and determine the corresponding spatial beam absolute index information based on each measurement pilot port group.

[0169] One implementation is that the network side device configures one or more measurement pilot resources, and the measurement pilot resources mainly configure CSI-RS. Each measurement pilot resource configuration includes a corresponding measurement pilot port indication, for example: a CSI-RS measurement pilot resource is configured with 32 pilot ports, and the network side device configures K>0 CSI-RS resources, and the total number of ports is 32*K. The terminal divides the total number of ports into S groups, which is equivalent to grouping the sub-arrays of the antenna panel associated with the measurement pilot. The grouping can be pre-configured by the network side device, if the network side device only configures one grouping method, the terminal defaults to the only indicated port grouping method; if the network side device configures multiple grouping methods, the terminal can select the most suitable grouping method based on the current wireless channel environment, and the terminal reports the preferred grouping method to the network side device at the same time.

[0170] For example, for a 64-port CSI-RS measurement pilot associated antenna panel, where the number of CSI-RS ports associated in the horizontal dimension is N1=8, and the number of CSI-RS ports associated in the vertical dimension is N2=4, the network side device pre-divides the following three grouping methods: {[1x1], [2x1], [2x2]} where [1x1] means no division, [2x1] means that the horizontal dimension is divided into two parts, and the vertical dimension is not divided, and [2x2] means that the horizontal dimension and the vertical dimension are each divided into two parts, and the total antenna panel is divided into 4 parts. The terminal selects an optimal division method from the three grouping methods based on channel measurement and reports it to the network side device.

[0171] If the terminal selects the [2x2] division method, i.e., the antenna panel is split into 4 parts, and the number of measurement pilot ports corresponding to each part is 8 / 2*4 / 2=8 ports (here, it refers to the same polarization direction). The terminal can also determine the effective sub-antenna panel and report it to the network through bitmap, for example, according to the size of the reference signal received power (RSRP), only select the effective sub-antenna panel of three or two. For the sequence arrangement of the sub-antenna panel number, the protocol can be pre-defined to arrange from the horizontal dimension first and then from the vertical dimension, or to arrange from the vertical dimension first and then from the horizontal dimension. In addition, if multiple CSI-RS measurement pilots are associated with the same normal antenna panel, the sequence arrangement of the antenna panel number can also be arranged in ascending order based on the pilot ID of the CSI-RS. The network side device can also inform the terminal that some CSI-RS pilot resources are the same normal line, and other certain CSI-RS pilot resources are another same normal line. The terminal can only implement antenna grouping or measurement pilot port grouping based on network indication on the same normal measurement pilot resource. If multiple CSI-RS pilot resources are the same normal line, the network side device can also indicate to the terminal which CSI-RS ports are separated by the antenna panel, and the separated ports cannot be divided into the same group.

[0172] The terminal determines multiple effective measurement pilot port groups based on the above measurement pilot configuration, and obtains the received wireless channel information through the corresponding measurement pilot. The terminal determines the spatial domain beam absolute index information associated with the corresponding measurement pilot port based on the wireless channel information. The spatial domain beam representation usually uses a DFT discrete Fourier transform basis vector. In order to improve the resolution of the beam, further upsampling is introduced on the DFT basis formula, and the following is the generation formula of the beam basis.

[0173] where N1 and N2 are the number of antenna ports in the horizontal and vertical dimensions of the antenna panel, and O1 and O2 are the DFT basis up-sampling factors in the horizontal and vertical dimensions of the antenna panel. The DFTs of the horizontal and vertical dimension joint beams are expressed in the form of Kronecker product.

[0174] Consider the scenario of a very large scale antenna panel (as shown in FIG. 3), and by default divide the antenna panel into 2 x 2 = 4 equal sub-arrays, each sub-array corresponding to the parameters O1 = 4, O2 = 4. Simulation verifies the relationship between the DFT basis indices associated with the 4 sub-arrays in the direction of the normal angle being 0° as the distance between the terminal and the antenna panel increases from near to far (as shown in Table 3).

[0175] Table 3: Relationship between DFT basis indices associated with the 4 sub-arrays

[0176] As can be seen from Table 3, when the terminal is close to the antenna panel, the AOD / ZOD angles observed by different sub-panels and the terminal under the direct diameter are different, mainly due to the near-field spherical wave effect; as the distance increases, the electromagnetic wave transmission tends to be in the far field, and the AOD / ZOD observed by different sub-panels and the terminal under the direct diameter are the same, and the corresponding parameters (for example, N1 or N2 or O1 or O2) of each sub-panel become the same. For example, if the terminal identifies that it is in the near field, it can report the beam index information in the form of sub-array grouping; the antenna ports in each sub-array group are still in the far field, and the existing codebook process can be followed; if it is identified as a far field, no sub-array grouping is performed, and the terminal directly feeds back the beam index information under the entire antenna panel. For the near field scenario, as can be seen from the above Table 3, the absolute indices corresponding to the 4 sub-arrays are very small under different parameters. For example, the index of the [7 0 7 0] DFT basis vector, since the range is 0-7, considering the cyclic relationship of the DFT basis, the index 7 of the DFT basis vector corresponding to the 1st measurement pilot port group (corresponding to sub-array 1) and the index 0 of the DFT basis vector corresponding to the 2nd measurement pilot port group (corresponding to sub-array 2) are actually indices with an interval of 1; similarly, for the index of the [3 3 1 1] vertical dimension DFT basis vector up-sampling, since the range is 0-3, considering the DFT basis up-sampling formula, the index 3 of the DFT basis vector up-sampling corresponding to the 1st measurement pilot port group (corresponding to sub-array 1) and the index 1 of the DFT basis vector up-sampling corresponding to the 3rd measurement pilot port group (corresponding to sub-array 3) are indices with an interval of 2.

[0177] Based on the above simulation verification, the absolute index information of the spatial domain beam corresponding to different measurement pilot port groups (corresponding to different subarray groupings) is correlated. In order to reduce the feedback overhead in CSI, the absolute index information of the spatial domain beam does not need to be fed back for each measurement pilot port group, and can be fed back in a differential index manner. The network side device can also not let the terminal feed back the index difference, at which time the terminal should understand that the absolute indices of the beams associated with different measurement pilot port groups are the same by default (the equivalent index difference is always 0). The network side device needs to configure the terminal: which measurement pilot port groups are a set and share the same absolute beam index; which measurement pilot port groups are another set and share another same absolute beam index.

[0178] The following describes a scenario in which the terminal feeds back beam differential index information.

[0179] For the differential index feedback of the spatial domain beam differential index information corresponding to a measurement pilot port group, the terminal needs to first determine a reference measurement pilot port group, so that the spatial domain beam differential index information corresponding to the measurement pilot port group can be determined jointly based on the spatial domain beam index information corresponding to the measurement pilot port group and the spatial domain beam index information corresponding to the reference measurement pilot port group.

[0180] First, the measurement pilot port groups for which the differential index can be calculated are constrained, for example, at least one of the following five constraints can be included:

[0181] a) Certain measurement pilot port groups need to be indicated by the network side device as being co-normal, or, by being configured in a pilot resource set to implicitly tell the terminal that these measurement pilot port groups can determine the beam differential index relationship.

[0182] b) In the horizontal dimension of the antenna panel, both have the same number of measurement pilot ports This constraint ensures that the same DFT basis formula is used in the horizontal dimension.

[0183] c) In the vertical dimension of the antenna panel, both have the same number of measurement pilot ports This constraint ensures that the same DFT basis formula is used in the vertical dimension.

[0184] d) Both have the same QCL relationship. It can also be considered as a co-normal representation.

[0185] e) Both have the same number of spatial domain beams corresponding to each other. One measurement pilot port group can be configured with L beams, and since each beam needs to feed back the differential index, the measurement pilot port group must be configured with the same number of spatial domain beams.

[0186] Definition of beam absolute index: Since the spatial beam feature is mainly characterized by the DFT base, the index parameters related to the DFT base can be defined as the beam index. For example, the index associated with the horizontal dimension:

[0187] The up-sampling index q1 of the DFT base vector, the range is 0 ~ O1-1;

[0188] The index n1 of the DFT base vector, the range is

[0189] The index m1 determined based on the joint of the up-sampling index and the DFT base index, m1 = O1n1+q1, is the set of all up-sampling and all DFT base indexes, the range is

[0190] The index associated with the vertical dimension:

[0191] The up-sampling index q2 of the DFT base vector, the range is 0 ~ O2-1;

[0192] The index n2 of the DFT base vector, the range is

[0193] The index m2 determined based on the joint of the up-sampling index and the DFT base index, m2 = O2n2+q2, is the set of all up-sampling and all DFT base indexes, the range is 1＝2

[0194] In addition to defining the beam index based on the horizontal dimension and the vertical dimension respectively, the beam index can also be defined based on the joint Kronecker product of the horizontal dimension and the vertical dimension, that is, the third index n. Wherein The range is It should be noted that there is no up-sampling index information here.

[0195] The terminal obtains the L beam absolute information corresponding to each measurement pilot port group based on the wireless channel measurement. When calculating the beam differential index, a reference target measurement pilot port group (for example, the reference measurement pilot port group) needs to be determined. The reference target measurement pilot port group can be pre-agreed by the protocol or determined by the terminal. The terminal needs to inform the network side device which measurement pilot port group is used as the reference. After determining the reference target measurement pilot port group, the beam differential index information of other measurement pilot port groups can be determined. One way is to directly calculate the index difference between the two, for example, in the horizontal dimension, the differential index of each beam at least contains one of the following definitions:

[0196] The differential index Δq1 is the index q1 associated with the measurement pilot port group and the index ​The difference between the index n1 of the measurement pilot port group and the index information of the reference measurement pilot port group. The up-sampling index of the DFT basis vector in the horizontal dimension.

[0197] The difference between the index n1 of the measurement pilot port group and the index information of the reference measurement pilot port group. The difference between the index n1 of the measurement pilot port group and the index information of the reference measurement pilot port group. The index of the DFT basis vector in the horizontal dimension.

[0198] The difference between the index m1 of the measurement pilot port group and the index information of the reference measurement pilot port group. The difference between the index m1 of the measurement pilot port group and the index information of the reference measurement pilot port group. The index determined based on the up-sampling index and the DFT basis index in the horizontal dimension.

[0199] For example, in the vertical dimension, the differential index of each beam at least contains one of the following definitions:

[0200] The difference between the index q2 of the measurement pilot port group and the index information of the reference measurement pilot port group. The difference between the index q2 of the measurement pilot port group and the index information of the reference measurement pilot port group. The up-sampling index of the DFT basis vector in the vertical dimension.

[0201] The difference between the index n2 of the measurement pilot port group and the index information of the reference measurement pilot port group. The difference between the index n2 of the measurement pilot port group and the index information of the reference measurement pilot port group. The index of the DFT basis vector in the vertical dimension.

[0202] The difference between the index m2 of the measurement pilot port group and the index information of the reference measurement pilot port group. The difference between the index m2 of the measurement pilot port group and the index information of the reference measurement pilot port group. The index determined based on the up-sampling index and the DFT basis index in the vertical dimension.

[0203] In addition to defining the beam index in the horizontal dimension and the vertical dimension respectively, the differential index Δn that is the difference between the index n of the measurement pilot port group and the index information of the reference measurement pilot port group can also be determined based on the index in multiple dimensions. The difference between the index n of the measurement pilot port group and the index information of the reference measurement pilot port group.

[0204] It should be noted that the difference between the indexes may be positive or negative, regardless of which differential index. The differential index can be reported by B bits of information.

[0205] In some scenarios, if the sub-arrays associated with different measurement pilot port groups are far apart in space, the differential index value can be larger, and the bit overhead of the feedback can also increase. Considering that the differential index value of adjacent sub-arrays is generally small, another way to reduce the feedback overhead is that different measurement pilot port groups do not refer to the same target pilot port group when calculating the corresponding beam differential index, but each refers to the nearest pilot port group as the target to calculate the beam differential index. As shown in FIG. 4.

[0206] One large antenna panel is split into 4x2=8 sub-arrays, and the sub-array group index or each measurement pilot port group index can be pre-defined by the protocol in a sequence, which is not limited to the sequence shown in the present solution. Among them, sub-array 1 feeds back the beam index by default, and other sub-arrays 2-8 feed back the beam differential index. One implementation is that the beam differential index corresponding to each sub-array index k (where k∈2-8) is calculated based on the beam index of the kth sub-array and the beam index of the adjacent (k-1)th or (k-2)th sub-array as the reference target. The reference target is not limited to the embodiment protected by the present solution.

[0207] Considering special scenarios such as spatial non-stationarity, some sub-arrays or associated measurement pilot port groups can be indicated to be invalid, and the corresponding codebook information does not need to be fed back. For the invalid sub-array, one way is to arrange the measurement pilot port group index based only on the valid measurement pilot port group index from small to large, and the arrangement sequence can be vertical first and then horizontal, or horizontal first and then vertical. Another way is to arrange the measurement pilot port group index to include both valid and invalid port group indexes, and the beam differential index corresponding to the invalid port group is 0 by default. Although the beam absolute index corresponding to the invalid measurement pilot port group is meaningless, it can be involved in the differential index calculation process of other port groups. In order to reduce the CSI feedback overhead, the terminal can not report the differential index of the invalid measurement pilot port group.

[0208] Example two,

[0209] When the network side device configures the same phase superposition joint transmission on multiple antenna panels, the traditional design idea is that the terminal reports the differential phase information between the antenna panels in the beam domain, for example: multiple beams on each panel share a differential phase information between panels. On the one hand, the differential phase information between panels corresponding to each beam is not the same, so the current design performance has the potential for further improvement, on the other hand, if each beam reports the differential phase information separately, it will increase the feedback overhead. Considering that the relative position relationship between the multiple antenna panels of the network side device is fixed and unchanged, under certain special antenna panel design, this fixed position relationship can ensure that the differential phase information between panels corresponding to each beam is also an approximately fixed value. The terminal reports the CSI in the following way in this example:

[0210] The terminal receives the first signaling configured by the network side device, and the signaling contains the spatial domain beam differential phase information of the base vector corresponding to at least one spatial domain beam absolute index. For example: RRC configures multiple spatial domain beam differential phase information, each spatial domain beam differential phase information is associated with a spatial domain beam index, and the spatial domain beam index is determined by at least one of the index associated with the horizontal dimension or the vertical dimension in the above example one, or the index determined based on the two dimensions.

[0211] Further, if the network side device configures multiple measurement pilot port groups, wherein the network side device indicates that one of the measurement pilot port groups is a reference measurement pilot port group, or the protocol predefines a certain measurement pilot port group as a reference measurement pilot port group. Except for the reference measurement pilot port group, each measurement pilot port group is indicated to be associated with the differential phase information of a certain spatial domain beam index.

[0212] The terminal reports the CSI, which is determined based on the base vector corresponding to the same spatial domain beam index and the corresponding spatial domain beam differential phase. Assuming that: RRC configures 4 measurement pilot port groups, and the first measurement pilot port group is the reference measurement pilot port group by default, and the default phase information of each beam index corresponding to the reference measurement pilot port group is 0, i.e. e j0 =1, so RRC only configures the spatial domain beam differential phase of 3 measurement pilot port groups under each beam index, for example: for the beam base vector v l,m corresponding to the joint determination of the horizontal dimension beam index l and the vertical dimension beam index m, the spatial domain beam differential phases corresponding to the remaining 3 measurement pilot port groups are The joint beam base vector of the 4 measurement pilot port groups when the terminal calculates the codebook based on the beam base vector is:

[0213] wherein the differential phase of each measurement pilot port group corresponding to the spatial domain beam can be directly configured by the network side device, for example, there are 16 beams in the horizontal dimension and 4 beams in the vertical dimension, and the network side device needs to configure 16*4=64 differential phase information for each measurement pilot group. Another network configuration method is: horizontal and vertical beams are configured respectively, for example: there are 16 beams in the horizontal dimension, and each horizontal beam corresponding to the kth measurement pilot group is associated with a differential phase there are 4 beams in the vertical dimension, and each vertical beam corresponding to the kth measurement pilot group is associated with a differential phase then the differential phase of the lth beam corresponding to the kth measurement pilot group and the mth beam in the vertical dimension is jointly determined

[0214] Further, if the lth beam is the DFT index (not including the up-sampling index) in the first index, the differential phase associated with the beam index determined based on the joint of the up-sampling index and the DFT base index can be inferred according to the differential phase information corresponding to the DFT index through further interpolation operation. One interpolation method is to use the phase information corresponding to the adjacent two DFT base indexes and the phase information corresponding to the intermediate up-sampling O1-1 beam base can be obtained by linear interpolation; similarly, if the index of the mth beam is the DFT index, the differential phase associated with the beam index determined based on the joint of the up-sampling index and the DFT base index can be inferred according to the differential phase information corresponding to the DFT index through further interpolation operation.

[0215] In another embodiment, the network side device is difficult to obtain the differential phase of the spatial domain beam in different beam directions, which can rely on the terminal reporting. For example: the network side device configures the second information signaling, and the terminal reports at least one spatial domain beam index and T p >0 differential phases of the spatial domain beam associated with the beam index in the CSI based on the second signaling.

[0216] For example: the network side device configures aperiodic CSI reporting, the CSI reporting is associated with 4 measurement pilot port groups, and the 1st measurement pilot port group is the reference measurement pilot port group by default, for the beam base vector v l,m corresponding to the horizontal dimension beam index l and the vertical dimension beam index m, the differential phases of the spatial domain beams corresponding to the remaining 3 measurement pilot port groups are respectively

[0217] The terminal reports 3 differential phases of the spatial domain beam, and simultaneously reports the horizontal dimension beam index l and the vertical dimension beam index m. The terminal reports at most L beam base vectors v in each CSIl,m The index of the beam basis vector can be a multi-dimensional spatial domain beam index, each beam basis vector is associated with 3 spatial domain beam differential phases. Wherein L beams are indicated from a beam set by a combined indication manner. Alternatively, the beam basis vector differential phase information contained in the CSI reported by the terminal aperiodically includes beam basis vector differential phase information associated with a horizontal dimension beam basis vector and / or a vertical dimension beam basis vector, the differential phase information includes differential phase information of the kth measurement pilot port group associated horizontal dimension beam basis vector And / or differential phase information of the vertical dimension beam basis vector The index corresponding to the horizontal dimension beam basis vector is a first index, and the index corresponding to the vertical dimension beam basis vector is a second index.

[0218] In this embodiment, for the CSI design of MIMO, a key research direction is to reduce the feedback overhead of CSI. Different antenna panels, whether co-normal or 3D-array, have a strong correlation in the spatial domain on the network side, such as beam orientation and even fixed phase information between beams. Therefore, the CSI feedback overhead can be further reduced. The embodiments of the present application propose spatial domain beam differential index feedback, spatial domain beam differential phase feedback, and network side device configuration of spatial domain beam differential phase information to the terminal to achieve the purpose of reducing the CSI feedback overhead.

[0219] In the embodiments of the present application, the terminal reports CSI to the network side device based on the first information associated with the measurement pilot port group, such as one or more of the following: spatial domain beam index, spatial domain beam differential index, spatial domain beam differential phase, measurement pilot port group indication information, etc. The terminal determines the CSI based on the first information such as beam differential index and beam differential phase, or reports the first information such as beam differential index and beam differential phase in the CSI, which can avoid separately feeding back index information or phase information for each TRP and each beam, and effectively reduce the feedback overhead.

[0220] As shown in FIG. 5, the embodiments of the present application also provide a channel state information transmission method, which is executed by a network side device, and the method comprises:

[0221] Step 501, the network side device receives the CSI sent by the terminal, the CSI is determined according to the first information associated with the measurement pilot port group, and / or the CSI includes the first information associated with the measurement pilot port group;

[0222] The first information includes at least one of the following:

[0223] Spatial domain beam index;

[0224] spatial beam differential index;

[0225] spatial beam differential phase;

[0226] measurement pilot port group indication information.

[0227] In this embodiment, the terminal can determine multiple valid measurement pilot port groups based on the measurement pilot configuration, and determine the corresponding spatial beam index information based on each measurement pilot port group. The terminal reports the CSI to the network side device, which can contain one or more of the first information, or determine the information content in the CSI according to one or more of the first information.

[0228] For example, the terminal reports the CSI to the network side device, which contains the information of S1 (S1>0) spatial beam indexes and / or the information of S2 (S2>0) spatial beam differential indexes. Since the number of bits representing the spatial beam differential phase is smaller than the number of bits representing the absolute index of the beam, this reporting method avoids the need for the terminal to report the absolute index information of the beam associated with each measurement pilot port group when reporting the CSI, effectively saving network resources and reducing feedback overhead.

[0229] For another example, the terminal determines the information content in the CSI according to the spatial beam index and the spatial beam differential phase, and reports the CSI to the network side device. Considering that different measurement pilot port groups are associated with different network side antenna radio frequency unit groups, and the relative positions between different radio frequency unit groups are fixed when the network is deployed, there will also be a stable phase difference information (or phase rotation information) between different measurement pilot port groups on each spatial beam. The terminal can report the measured phase difference information aperiodically without periodically reporting the phase difference information, which can reduce the feedback overhead. At the same time, the terminal can also receive a network signaling indication, which carries the phase difference information pre-configured by the network. In this way, the terminal can further calculate the joint transmission CSI information under multiple TRP / Panels based on the received phase difference information, including codebook, Rank, CQI, and other CSI information.

[0230] Optionally, the CSI reported by the terminal can further include measurement pilot port group indication information, which is used to indicate the measurement pilot port group indication information associated with the CSI. For example, the network side device configures multiple measurement pilot port group indication information for the terminal, indicating multiple measurement pilot port grouping patterns, and the terminal selects at least one matched measurement pilot port grouping indication information from the multiple patterns according to the actual channel state measured, and sends the selected pattern identifier to the network side device through the CSI. Meanwhile, the terminal can further calculate the CSI associated with the measurement pilot port group indication information of the selected pattern, including codebook, Rank, CQI and other CSI information.

[0231] In the embodiments of the present application, when reporting the CSI to the network side device, the terminal reports the CSI based on the first information associated with the measurement pilot port group, such as one or more of the spatial domain beam index, the spatial domain beam differential index, the spatial domain beam differential phase, and the measurement pilot port group indication information. The terminal determines the CSI based on the first information such as the beam differential index and the beam differential phase, or reports the first information such as the beam differential index and the beam differential phase in the CSI, which can avoid separately feeding back the index information or phase information for each TRP and each beam, and effectively reduce the feedback overhead.

[0232] Optionally, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; and the first spatial domain beam differential index associated with the measurement pilot port group is determined according to the first spatial domain beam index associated with the measurement pilot port group and the second spatial domain beam index associated with the reference measurement pilot port group.

[0233] In this embodiment, the measurement pilot port group is any one port group after the measurement pilot port grouping, and each measurement pilot port group has a corresponding reference measurement pilot port group. The reference measurement pilot port group corresponding to each measurement pilot port group can be the same or different. The measurement pilot port group determines the spatial domain beam differential index and / or the spatial domain beam differential phase with reference to the reference measurement pilot port group.

[0234] It should be noted that in the embodiments of the present application, the first spatial domain beam index is the beam index associated with the measurement pilot port group, and the second spatial domain beam index is the beam index associated with the reference measurement pilot port group. Here, the first spatial domain beam index and the second spatial domain beam index are only used to distinguish the beam index of the reference port group and the beam index of the non-reference port group, and do not specifically refer to a certain beam index. The first spatial domain beam differential index associated with the measurement pilot port group is determined based on the spatial domain beam index associated with the port group and the spatial domain beam index associated with the reference measurement pilot port group.

[0235] Optionally, in the CSI reporting, any one of the measurement pilot port groups and the corresponding reference measurement pilot port group are respectively associated with L beams, and the terminal reports L spatial beam differential index information associated with each measurement pilot port group in addition to reporting L spatial beam index information associated with the reference measurement pilot port group. For example, L = 3, the first spatial beam differential index information associated with the measurement pilot port group is determined based on the first spatial beam index associated with the measurement pilot port group and the first spatial beam index associated with the reference measurement pilot port group; the second spatial beam differential index information associated with the measurement pilot port group is determined based on the second spatial beam index associated with the measurement pilot port group and the second spatial beam index associated with the reference measurement pilot port group; and the third spatial beam differential index information associated with the measurement pilot port group is determined based on the third spatial beam index associated with the measurement pilot port group and the third spatial beam index associated with the reference measurement pilot port group. That is, the order of the L spatial beam differential index information associated with the measurement pilot port group and the order of the L spatial beam index associated with the reference measurement pilot port group are one-to-one associated.

[0236] As an optional embodiment, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; the spatial beam differential phase associated with the measurement pilot port group is determined based on phase information corresponding to a first spatial beam index associated with the measurement pilot port group and phase information corresponding to a second spatial beam index associated with the reference measurement pilot port group; and the first spatial beam index and the second spatial beam index are the same.

[0237] In this embodiment, the spatial beam differential phase associated with the measurement pilot port group is determined based on phase information corresponding to a first spatial beam index associated with the measurement pilot port group and phase information corresponding to a second spatial beam index associated with the reference measurement pilot port group. It should be noted that in this embodiment, the first spatial beam index and the second spatial beam index are the same, for example, when determining the beam differential phase, the phase information of the same beam index in the two port groups is determined. In this case, assuming that a plurality of measurement pilot port groups are associated with the same set of spatial beam indexes, for example, there are four measurement pilot port groups, and the four measurement pilot port groups are all associated with beam index 1, beam index 2, and beam index 3.

[0238] For example, the reference measurement pilot port group for port group 1 is port group 2. The spatial beam indices associated with port group 1 include: beam index 1, beam index 2, and beam index 3. Similarly, the spatial beam indices associated with port group 2 also include: beam index 1, beam index 2, and beam index 3. When determining the spatial beam differential phase of spatial beam 1 of port group 1, it is determined based on the phase information of beam index 1 associated with port group 1 and the phase information of beam index 1 associated with port group 2. When determining the spatial beam differential phase of spatial beam 2 of port group 1, it is determined based on the phase information of beam index 2 associated with port group 1 and the phase information of beam index 2 associated with port group 2. When determining the spatial beam differential phase of spatial beam 3 of port group 1, it is determined based on the phase information of beam index 3 associated with port group 1 and the phase information of beam index 3 associated with port group 2.

[0239] Optionally, the phase information of each beam associated with the reference measurement pilot port group is 0 by default, i.e., e j0 =1.

[0240] As an optional embodiment, the method further includes: sending second information to the terminal, the second information including information on the spatial beam differential phase.

[0241] In this embodiment, the spatial beam differential phase can be configured by the network-side device. The second information can be sent by the network-side device via a signaling. For example, the terminal receives a first signaling configuration from the network-side device, which carries differential phase information of the basis vector corresponding to at least one spatial beam absolute index. The terminal can determine the CSI based on the spatial beam differential phase configured by the network-side device and other information (such as the spatial beam index).

[0242] For example, the terminal receives a second signaling configured by the network-side device. This second signaling can be an aperiodic CSI report. The terminal reports at least one piece of spatial information in the CSI, including a spatial beam index and a T associated with the spatial beam index. p >0 spatial beam differential phase information, the T p The spatial beam differential phase information is based on T by the terminal. p The differential phase information of the basis vectors corresponding to the spatial beam indices associated with different measurement pilot ports is determined relative to the basis vectors corresponding to the same spatial beam index associated with the reference measurement pilot port group.

[0243] Optionally, the measurement pilot port group and the reference measurement pilot port group satisfy a first condition;

[0244] The first condition includes at least one of the following:

[0245] 1) Co-normal; optionally, the measurement pilot port group and the corresponding reference measurement pilot port group can be contained in one set, and the measurement pilot port group and the reference measurement pilot port group contained in the same set can be indicated by the network side device as co-normal. The spatial domain beam difference information and / or the spatial domain beam phase information can be calculated between the measurement pilot port group and the reference measurement pilot port group in the same set. The spatial domain beam difference information or the spatial domain beam phase information is calculated independently between different sets.

[0246] 2) configured or indicated to determine the spatial domain beam difference index; optionally, the network configures different measurement pilot port groups, and the measurement pilot port group and the reference measurement pilot port group in the same set are configured or indicated by the network side device to determine the spatial domain beam difference index. The spatial domain beam difference index information is calculated independently between different sets.

[0247] 3) configured or indicated to determine the spatial domain beam difference phase; optionally, the network configures different measurement pilot port groups, and the measurement pilot port group and the reference measurement pilot port group in the same set are configured or indicated by the network side device to determine the spatial domain beam difference phase. The spatial domain beam difference phase information is calculated independently between different sets.

[0248] 4) the number of measurement pilot ports contained is the same in the same spatial dimension; for example: in the first spatial dimension, the first measurement pilot port group and the reference measurement pilot port group have the same number of measurement pilot ports and / or, in the second spatial dimension, the first measurement pilot port group and the reference measurement pilot port group have the same number of measurement pilot ports Wherein the first spatial dimension and the second spatial dimension correspond to the horizontal dimension and the vertical dimension of the antenna panel respectively.

[0249] 5) have the same quasi co-location (QCL); optionally, the measurement pilot port group and the corresponding reference measurement pilot port group are configured or indicated by the network side device to have the same QCL relationship.

[0250] 6) the number of corresponding spatial domain beams is the same, and optionally, the number of corresponding (or associated) spatial domain beams of the measurement pilot port group and the corresponding reference measurement pilot port group is the same.

[0251] In the embodiments of the present application, the measurement pilot port group and the corresponding reference measurement pilot port group satisfy one or more of the first conditions described above, and it can also be understood that any measurement pilot port group and its corresponding reference measurement pilot port group satisfy one or more of the first conditions described above. When determining the spatial domain beam difference index and / or the spatial domain beam difference phase of the measurement pilot port group, the port group satisfying the first condition described above needs to be used as the reference measurement pilot port group.

[0252] As an optional embodiment, the first spatial domain beam index and the second spatial domain beam index are single-dimensional spatial domain beam indexes.

[0253] Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimensional spatial domain beam indexes.

[0254] In this embodiment, the first spatial domain beam index and the second spatial domain beam index used for calculating the spatial domain beam difference index and / or the spatial domain beam difference phase can be single-dimensional spatial domain beam indexes or multi-dimensional spatial domain beam indexes. Wherein, the first difference index can be determined by using the single-dimensional first spatial domain beam index and the second spatial domain beam index; the second difference index can be determined by using the multi-dimensional first spatial domain beam index and the second spatial domain beam index.

[0255] The single dimension is, for example, a first spatial dimension or a second spatial dimension, which is, for example, a horizontal dimension or a vertical dimension. For example, the first spatial domain beam index and the second spatial domain beam index can be horizontal dimension beam indexes, or the first spatial domain beam index and the second spatial domain beam index can be vertical dimension beam indexes.

[0256] The multi-dimension is, for example, a joint of a first spatial dimension and a second spatial dimension, which is, for example, a joint of a horizontal dimension or a vertical dimension. For example, the first spatial domain beam index and the second spatial domain beam index are indexes determined jointly by horizontal dimension associated spatial domain beam indexes and vertical dimension associated spatial domain beam indexes.

[0257] In this embodiment, by using the single-dimensional spatial domain beam index, the beam difference index and / or the beam difference phase associated with each port group when the antenna panel is grouped in a single dimension can be determined; by using the multi-dimensional spatial domain beam index, the beam difference index and / or the beam difference phase associated with each port group when the antenna panel is grouped in a multi-dimension can be determined. The method for determining the spatial domain beam difference index and / or the spatial domain beam difference phase under different grouping modes is provided, and the implementation process is more flexible.

[0258] For example, in the case that the first spatial domain beam index and the second spatial domain beam index are spatial domain beam indexes in a first spatial dimension, the first spatial domain beam index and the second spatial domain beam index can include at least one of the following:

[0259] an up-sampling index of a DFT basis vector in the first spatial dimension, denoted as index q1; the up-sampling index of the DFT basis vector is a value having a function relationship with an up-sampling multiple.

[0260] an index of a DFT basis vector in the first spatial dimension, denoted as index n1;

[0261] an index determined based on the up-sampling index and the DFT basis index in the first spatial dimension, denoted as index m1; where m1=O1n1+q1, O1 represents a DFT basis up-sampling multiple in the first spatial dimension.

[0262] For another example, in the case that the first spatial domain beam index and the second spatial domain beam index are spatial domain beam indexes in a second spatial dimension, the first spatial domain beam index and the second spatial domain beam index can include at least one of the following:

[0263] an up-sampling index of a DFT basis vector in the second spatial dimension, denoted as index q2;

[0264] an index of a DFT basis vector in the second spatial dimension, denoted as index n2;

[0265] an index determined based on the up-sampling index and the DFT basis index in the second spatial dimension, denoted as index m2; where m2=O2n2+q2, O2 represents a DFT basis up-sampling multiple in the second spatial dimension.

[0266] Optionally, in the case that the first spatial domain beam index and the second spatial domain beam index are spatial domain beam indexes in multiple dimensions, the first spatial domain beam index and the second spatial domain beam index can be denoted as n. is the number of measurement pilot ports in the first spatial dimension.

[0267] Optionally, the spatial domain beam differential index includes at least one of the following:

[0268] (1) a first differential index determined according to a first spatial domain beam index and a second spatial domain beam index in a single dimension.

[0269] For example: for the first spatial dimension, the first differential index can include at least one of the following:

[0270] In the first spatial dimension, a difference index AQ1 between an index q1 of DFT basis vector upsampling associated with the measurement pilot port group and an index q1 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ1 can be a difference between q1 and . In the first spatial dimension, a difference index AQ1 between an index q1 of DFT basis vector upsampling associated with the measurement pilot port group and an index q1 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ1 can be a difference between q1 and .

[0271] In the first spatial dimension, a difference index AQ1 between an index q1 of DFT basis vector upsampling associated with the measurement pilot port group and an index q1 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ1 can be a difference between q1 and . In the first spatial dimension, a difference index AQ1 between an index q1 of DFT basis vector upsampling associated with the measurement pilot port group and an index q1 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ1 can be a difference between q1 and .

[0272] In the first spatial dimension, a difference index AQ1 between an index q1 of DFT basis vector upsampling associated with the measurement pilot port group and an index q1 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ1 can be a difference between q1 and . In the first spatial dimension, a difference index AQ1 between an index q1 of DFT basis vector upsampling associated with the measurement pilot port group and an index q1 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ1 can be a difference between q1 and .

[0273] For the second spatial dimension, the first difference index can include at least one of the following:

[0274] In the second spatial dimension, a difference index AQ2 between an index q2 of DFT basis vector upsampling associated with the measurement pilot port group and an index q2 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ2 can be a difference between q2 and . In the second spatial dimension, a difference index AQ2 between an index q2 of DFT basis vector upsampling associated with the measurement pilot port group and an index q2 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ2 can be a difference between q2 and .

[0275] In the second spatial dimension, a difference index AQ2 between an index q2 of DFT basis vector upsampling associated with the measurement pilot port group and an index q2 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ2 can be a difference between q2 and . In the second spatial dimension, a difference index AQ2 between an index q2 of DFT basis vector upsampling associated with the measurement pilot port group and an index q2 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ2 can be a difference between q2 and .

[0276] In the second spatial dimension, a difference index AQ2 between an index q2 of DFT basis vector upsampling associated with the measurement pilot port group and an index q2 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ2 can be a difference between q2 and . In the second spatial dimension, a difference index AQ2 between an index q2 of DFT basis vector upsampling associated with the measurement pilot port group and an index q2 of DFT basis vector upsampling associated with the reference measurement pilot port group; AQ2 can be a difference between q2 and .

[0277] (2) A second difference index is determined according to the first spatial beam index and the second spatial beam index of the multi-dimension.

[0278] For example, according to the second index n associated with the measured pilot port group and the second index associated with the reference measured pilot port group determining.

[0279] The difference between any of the above indexes can be configured by network signaling or predefined by a range in a protocol, which can be positive or negative, for example, 2 bits represent four values {-2, -1 0, 1} or another four values {-1, 0, 1, 2}; or the following forms {<=-2, -1 0, >=1} or {<=-1, 0, 1, >=2} and the like.

[0280] As an optional embodiment, the method further comprises:

[0281] sending one or more measured pilot port group indication information to the terminal, each of the measured pilot port group indication information being used to indicate the grouping information of the measured pilot port;

[0282] The measured pilot port group indication information contained in the first information is the measured pilot port group indication information associated with the CSI.

[0283] In this embodiment, the network side device configures multiple measured pilot port group indication information for the terminal, indicating multiple measured pilot port grouping patterns, and the terminal selects at least one matched measured pilot port grouping indication information from the multiple patterns according to the actual channel state measured, and sends the selected pattern identifier to the network side device through the CSI. Meanwhile, the terminal can also calculate the CSI associated with the measured pilot port group indication information based on the selected pattern, including codebook, Rank, CQI and other CSI information. For example, the near-field spherical wave characteristics caused by super large-scale antennas can be made far-field by antenna panel splitting, that is, each split sub-panel has a smaller antenna aperture, and the near-field spherical wave characteristics disappear, at this time, the wireless channel corresponding to each sub-panel tends to be far-field, and different near-field spherical characteristics can be matched by introducing more splitting methods. In the communication protocol, each sub-panel is associated with different measured pilot port groups, that is, different antenna panel splitting methods can correspond to different measured pilot port group combination patterns in the protocol.

[0284] For example, the network-side device configures one or more CSI-RS resources, and the total number of CSI-RS ports of the one or more CSI-RS resources is 256. The protocol can be predefined or the network-side device can indicate some pilot port group indication information. The terminal selects the CSI corresponding to the port group indication information from the multiple different pilot port group indication information configured by the network-side device based on the CSI-RS measurement, and reports the CSI.

[0285] In the embodiments of the present application, the terminal reports the CSI based on the first information associated with the measurement pilot port group when reporting the CSI to the network-side device, for example, one or more of the following: spatial domain beam index, spatial domain beam differential index, spatial domain beam differential phase, measurement pilot port group indication information, etc. The terminal determines the CSI based on the first information such as the beam differential index and the beam differential phase, or reports the first information such as the beam differential index and the beam differential phase in the CSI, which can avoid feeding back the index information or phase information for each TRP or each beam separately, and effectively reduce the feedback overhead.

[0286] The channel state information transmission method provided in the embodiments of the present application can be executed by the channel state information transmission. In the embodiments of the present application, the channel state information transmission method is executed by the channel state information transmission as an example, and the channel state information transmission device provided in the embodiments of the present application is described.

[0287] The channel state information transmission device provided in the embodiments of the present application can be a communication device or a component in the communication device, for example, a chip, as an example. The communication device can be a terminal, a network-side device, a server, etc. For example, the terminal can include but is not limited to the types of the terminal 11 listed above, the network-side device can include but is not limited to the types of the network-side device 12 listed above, and the embodiments of the present application are not limited specifically.

[0288] The channel state information transmission apparatus comprises a receiving module, a sending module and a processing module. The receiving module, the sending module and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor, which can include a general-purpose processor, a special-purpose processor, etc., such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA) or other programmable logic devices, a gate circuit, a transistor, a discrete hardware component, etc. The receiving module and the sending module can be implemented by a communication interface, which can include one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit, etc.

[0289] Specifically, referring to FIG. 6, when the channel state information transmission apparatus is a terminal or a component in a terminal, the channel state information transmission apparatus 600 comprises a first sending module 610 configured to send channel state information (CSI) to a network side device, wherein the CSI is determined according to first information associated with a measurement pilot port group, and / or the CSI comprises the first information associated with the measurement pilot port group.

[0290] The first information comprises at least one of the following:

[0291] a spatial beam index;

[0292] a spatial beam differential index;

[0293] a spatial beam differential phase;

[0294] measurement pilot port group indication information.

[0295] Optionally, each measurement pilot port group corresponds to a respective reference measurement pilot port group; the spatial beam differential index associated with the measurement pilot port group is determined according to a first spatial beam index associated with the measurement pilot port group and a second spatial beam index associated with the reference measurement pilot port group.

[0296] Optionally, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; the measurement pilot port group is associated with a differential phase of a spatial domain beam, and the differential phase is determined according to phase information corresponding to a first spatial domain beam index associated with the first measurement pilot port group and phase information corresponding to a second spatial domain beam index associated with the reference measurement pilot port group.

[0297] Optionally, the first spatial domain beam index and the second spatial domain beam index are the same.

[0298] Optionally, the apparatus further includes:

[0299] The first receiving module is configured to receive second information sent by the network-side device, the second information including information of the differential phase of the spatial domain beam.

[0300] Optionally, the measurement pilot port group and the reference measurement pilot port group satisfy a first condition.

[0301] The first condition includes at least one of the following:

[0302] Common normal line;

[0303] Configured or indicated for determining a differential index of a spatial domain beam;

[0304] Configured or indicated for determining a differential phase of a spatial domain beam;

[0305] The number of contained measurement pilot ports is the same in the same spatial dimension;

[0306] Has the same quasi co-location (QCL);

[0307] The number of corresponding spatial domain beams is the same.

[0308] Optionally, the first spatial domain beam index and the second spatial domain beam index are single-dimensional spatial domain beam indexes.

[0309] Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimensional spatial domain beam indexes.

[0310] Optionally, the apparatus further includes:

[0311] The second receiving module is configured to receive one or more measurement pilot port group indication information sent by the network-side device, each of the measurement pilot port group indication information being used to indicate grouping information of measurement pilot ports.

[0312] The measurement pilot port group indication information included in the first information is measurement pilot port group indication information associated with the CSI.

[0313] Referring to FIG. 7, when the channel state information transmission device is a network side device or a component in the network side device, the channel state information transmission device 700 includes:

[0314] a third receiving module 710, configured to receive the CSI sent by the terminal, wherein the CSI is determined according to the first information associated with the measurement pilot port group, and / or the CSI includes the first information associated with the measurement pilot port group;

[0315] The first information includes at least one of the following:

[0316] a spatial domain beam index;

[0317] a spatial domain beam differential index;

[0318] a spatial domain beam differential phase;

[0319] measurement pilot port group indication information.

[0320] Optionally, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; the spatial domain beam differential index associated with the measurement pilot port group is determined according to a first spatial domain beam index associated with the measurement pilot port group and a second spatial domain beam index associated with the reference measurement pilot port group.

[0321] Optionally, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; the spatial domain beam differential phase associated with the measurement pilot port group is determined according to phase information corresponding to a first spatial domain beam index associated with the measurement pilot port group and phase information corresponding to a second spatial domain beam index associated with the reference measurement pilot port group.

[0322] The first spatial domain beam index and the second spatial domain beam index are the same.

[0323] Optionally, the device further includes:

[0324] a second sending module, configured to send second information to the terminal, wherein the second information includes information of the spatial domain beam differential phase.

[0325] Optionally, the measurement pilot port group and the reference measurement pilot port group satisfy a first condition.

[0326] The first condition includes at least one of the following:

[0327] co-normal;

[0328] configured or indicated for determining the spatial domain beam differential index;

[0329] configured or indicated for determining the spatial domain beam differential phase.

[0330] The number of contained measurement pilot ports is the same in the same spatial dimension;

[0331] The QCLs are the same;

[0332] The number of corresponding spatial domain beams is the same.

[0333] Optionally, the first spatial domain beam index and the second spatial domain beam index are single-dimension spatial domain beam indexes.

[0334] Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimension spatial domain beam indexes.

[0335] Optionally, the apparatus further comprises:

[0336] a third sending module, configured to send one or more measurement pilot port group indication information to a terminal, each measurement pilot port group indication information being used to indicate grouping information of measurement pilot ports;

[0337] The measurement pilot port group indication information contained in the first information is measurement pilot port group indication information associated with the CSI.

[0338] In the embodiments of the present application, when a terminal reports CSI to a network side device, the terminal reports the CSI based on first information associated with a measurement pilot port group, for example, one or more of the following: a spatial domain beam index, a spatial domain beam difference index, a spatial domain beam difference phase, and measurement pilot port group indication information. The terminal determines the CSI based on the first information, such as the beam difference index and the beam difference phase, or reports the first information, such as the beam difference index and the beam difference phase, in the CSI, which can avoid the feedback of index information or phase information for each TRP or each beam, and effectively reduce the feedback overhead.

[0339] The channel state information transmission apparatus provided in the embodiments of the present application can implement each process of the method embodiments of FIGS. 2 to 5, and achieve the same technical effects. To avoid repetition, details are not described herein.

[0340] As shown in FIG. 8, the embodiments of the present application further provide a communication device 800, which comprises a processor 801 and a memory 802, and the memory 802 stores programs or instructions executable on the processor 801. For example, when the communication device 800 is a terminal, the programs or instructions are executed by the processor 801 to implement each step of the above-mentioned channel state information transmission method embodiments applied to the terminal, and achieve the same technical effects. When the communication device 800 is a network side device, the programs or instructions are executed by the processor 801 to implement each step of the above-mentioned method embodiments applied to the network side device, and achieve the same technical effects. To avoid repetition, details are not described herein.

[0341] The embodiment of the present application also provides a terminal, comprising a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used for running programs or instructions to realize the steps in the method embodiment shown in FIG. 2. The terminal embodiment corresponds to the terminal side method embodiment described above, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. The terminal can be the channel state information transmission device shown in FIG. 6. Specifically, FIG. 9 is a schematic diagram of the hardware structure of a terminal for implementing the embodiment of the present application.

[0342] The terminal 900 includes, but is not limited to, at least part of components such as a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.

[0343] Those skilled in the art can understand that the terminal 900 can also include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor 910 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than those shown, or combine certain components, or different component arrangements, which will not be described here.

[0344] It should be understood that in the embodiment of the present application, the input unit 904 can include a graphics processor 9041 and a microphone 9042, and the graphics processor 9041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 can include a display panel 9061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 can include two parts of a touch detection device and a touch controller. The other input devices 9072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), a trackball, a mouse, a joystick, which will not be described here.

[0345] In the embodiment of the present application, the radio frequency unit 901 can transmit downlink data from the network side device to the processor 910 for processing, and can also send uplink data to the network side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0346] The memory 909 can be used to store software programs or instructions and various data. The memory 909 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 909 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 909 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0347] The processor 910 can include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 910.

[0348] The radio frequency unit 901 is configured to: send channel state information (CSI) to a network side device, wherein the CSI is determined according to first information associated with a measured pilot port group, and / or the CSI includes the first information associated with the measured pilot port group.

[0349] The first information includes at least one of the following:

[0350] A spatial domain beam index;

[0351] spatial domain beam differential index;

[0352] spatial domain beam differential phase;

[0353] measurement pilot port group indication information.

[0354] Optionally, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; the spatial domain beam differential index associated with the measurement pilot port group is determined according to a first spatial domain beam index associated with the measurement pilot port group and a second spatial domain beam index associated with the reference measurement pilot port group.

[0355] Optionally, each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; the spatial domain beam differential phase associated with the measurement pilot port group is determined according to phase information corresponding to a first spatial domain beam index associated with the measurement pilot port group and phase information corresponding to a second spatial domain beam index associated with the reference measurement pilot port group.

[0356] The first spatial domain beam index and the second spatial domain beam index are the same.

[0357] Optionally, the radio frequency unit 901 is further configured to:

[0358] receive second information sent by the network side device, the second information including information of the spatial domain beam differential phase.

[0359] Optionally, the measurement pilot port group and the reference measurement pilot port group satisfy a first condition.

[0360] The first condition includes at least one of the following:

[0361] co-normal;

[0362] configured or indicated for determining the spatial domain beam differential index;

[0363] configured or indicated for determining the spatial domain beam differential phase;

[0364] the number of included measurement pilot ports is the same in the same spatial dimension;

[0365] have the same quasi co-location (QCL);

[0366] the number of corresponding spatial domain beams is the same.

[0367] Optionally, the first spatial domain beam index and the second spatial domain beam index are single-dimensional spatial domain beam indexes.

[0368] Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimensional spatial domain beam indexes.

[0369] Optionally, the radio frequency unit 901 is further configured to:

[0370] receive one or more measurement pilot port group indication information sent by the network side device, each of the measurement pilot port group indication information being used for indicating grouping information of measurement pilot ports;

[0371] The measurement pilot port group indication information contained in the first information is measurement pilot port group indication information associated with the CSI.

[0372] In the embodiments of the present application, the terminal reports the CSI based on the first information associated with the measurement pilot port group when reporting the CSI to the network side device, the first information associated with the measurement pilot port group being, for example, one or more of the following: a spatial domain beam index, a spatial domain beam differential index, a spatial domain beam differential phase, measurement pilot port group indication information, etc. The terminal determines the CSI based on the first information such as the beam differential index and the beam differential phase, or reports the first information such as the beam differential index and the beam differential phase in the CSI, which can avoid separately feeding back the index information or the phase information for each TRP or each beam, and effectively reduce the feedback overhead.

[0373] It can be understood that the implementation processes of the implementation manners mentioned in the embodiments can refer to the related descriptions of the method embodiments of the channel state information transmission method, and achieve the same or corresponding technical effects. To avoid repetition, they will not be described here again.

[0374] The embodiments of the present application also provide a network side device, which comprises a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used for running programs or instructions to realize the steps of the method embodiments as shown in FIG. 5. The network side device embodiments correspond to the above-mentioned network side device method embodiments, and each implementation process and implementation manner of the above-mentioned method embodiments can be applied to the network side device embodiments, and can achieve the same technical effects.

[0375] Specifically, the embodiments of the present application also provide a network side device, which can be the channel state information transmission apparatus shown in FIG. 7. As shown in FIG. 10, the network side device 1000 comprises an antenna 101, a radio frequency device 102, a baseband device 103, a processor 104 and a memory 105. The antenna 101 is connected with the radio frequency device 102. In the uplink direction, the radio frequency device 102 receives information through the antenna 101, and sends the received information to the baseband device 103 for processing. In the downlink direction, the baseband device 103 processes the information to be sent and sends it to the radio frequency device 102, and the radio frequency device 102 processes the received information and sends it out through the antenna 101.

[0376] The method performed by the network side device in the above embodiments can be implemented in the baseband device 103, which includes a baseband processor.

[0377] The baseband device 103 may, for example, include at least one baseband board on which a plurality of chips are disposed, as shown in FIG. 10, one of which is a baseband processor, for example, which is connected to the memory 105 through a bus interface to call programs in the memory 105 to perform the network device operations shown in the above method embodiments.

[0378] The network side device may, for example, further include a network interface 106, which is a Common Public Radio Interface (CPRI), for example.

[0379] Specifically, the network side device 1000 of the embodiments of the present application further includes instructions or programs stored on the memory 105 and executable on the processor 104, and the processor 104 calls the instructions or programs in the memory 105 to perform the method performed by each module shown in FIG. 7 and achieve the same technical effects. To avoid repetition, this will not be described here.

[0380] The embodiments of the present application also provide a readable storage medium having programs or instructions stored thereon, which are executed by a processor to implement each process of the above channel state information transmission method embodiments and achieve the same technical effects. To avoid repetition, this will not be described here.

[0381] The processor is the processor in the terminal in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0382] The embodiments of the present application further provide a chip including a processor and a communication interface, the communication interface being coupled to the processor, and the processor being configured to execute programs or instructions to implement each process of the above channel state information transmission method embodiments and achieve the same technical effects. To avoid repetition, this will not be described here.

[0383] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0384] The embodiment of the present application further provides a computer program / product, which is stored in a storage medium, and is executed by at least one processor to implement the processes of the channel state information transmission method embodiment, and achieves the same technical effects. To avoid repetition, details are not described herein.

[0385] The embodiment of the present application further provides a wireless communication system, which comprises a terminal and a network side device. The terminal can be used to execute the steps of the channel state information transmission method applied to the terminal, and the network side device can be used to execute the steps of the channel state information transmission method applied to the network side device.

[0386] The embodiment of the present application further provides a computer program product, which comprises computer instructions. When the computer instructions are executed by a processor, the steps of the channel state information transmission method are implemented, and the same technical effects are achieved. To avoid repetition, details are not described herein.

[0387] It should be noted that, in this document, the term "comprising" or "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to the order of performing functions as shown or discussed, and can also include performing functions in a substantially simultaneous manner or in a reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0388] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of computer software product and general hardware platform, of course, it can also be realized by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), and includes a plurality of instructions for making the terminal or network side device execute the method described in each embodiment of the present application.

[0389] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms of embodiments under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and these embodiments all belong to the protection of the present application.

Claims

1. A method for transmitting channel state information (CSI), comprising: a terminal sending, to a network side device, CSI determined according to first information associated with a measurement pilot port group, and / or the CSI comprising first information associated with a measurement pilot port group; wherein the first information comprises at least one of: a spatial domain beam index; a spatial domain beam differential index; a spatial domain beam differential phase; and measurement pilot port group indication information.

2. The method of claim 1, wherein, each of the measurement pilot port groups corresponding to a respective reference measurement pilot port group; a spatial domain beam differential index associated with the measurement pilot port group being determined according to a first spatial domain beam index associated with the measurement pilot port group and a second spatial domain beam index associated with a reference measurement pilot port group.

3. The method of claim 1, wherein, each of the measurement pilot port groups corresponding to a respective reference measurement pilot port group; a spatial domain beam differential phase associated with the measurement pilot port group being determined according to phase information corresponding to a first spatial domain beam index associated with the measurement pilot port group and phase information corresponding to a second spatial domain beam index associated with a reference measurement pilot port group; wherein the first spatial domain beam index and the second spatial domain beam index are identical.

4. The method of claim 1 or 3, wherein, The method further comprises: receiving second information sent by the network side device, the second information comprising information of the spatial domain beam differential phase.

5. The method of claim 2 or 3, wherein, the measurement pilot port group and the reference measurement pilot port group satisfying a first condition; the first condition comprising at least one of: a common normal line; being configured or indicated for determining a spatial domain beam differential index; being configured or indicated for determining a spatial domain beam differential phase; containing a same number of measurement pilot ports in a same spatial dimension; having a same quasi co-location (QCL); having a same number of corresponding spatial domain beams.

6. The method of claim 2 or 3, wherein, the first spatial domain beam index and the second spatial domain beam index being single-dimensional spatial domain beam indexes; or, the first spatial domain beam index and the second spatial domain beam index being multi-dimensional spatial domain beam indexes.

7. The method of claim 1, wherein, The method further comprises: receiving one or more measurement pilot port group indication information sent by the network side device, each of the measurement pilot port group indication information being used for indicating grouping information of measurement pilot ports; wherein the measurement pilot port group indication information contained in the first information is measurement pilot port group indication information associated with the CSI. 8.A method for transmitting channel state information (CSI), comprising: a network side device receiving CSI sent by a terminal, the CSI being determined according to first information associated with a measurement pilot port group, and / or the CSI comprising first information associated with a measurement pilot port group; wherein the first information comprises at least one of: a spatial domain beam index; a spatial domain beam differential index; a spatial domain beam differential phase; and measurement pilot port group indication information.

9. The method of claim 8, wherein, each of the measurement pilot port groups corresponding to a respective reference measurement pilot port group; a spatial domain beam differential index associated with the measurement pilot port group being determined according to a first spatial domain beam index associated with the measurement pilot port group and a second spatial domain beam index associated with a reference measurement pilot port group.

10. The method of claim 8, wherein, each of the measurement pilot port groups corresponding to a respective reference measurement pilot port group; a spatial domain beam differential phase associated with the measurement pilot port group is determined according to phase information corresponding to a first spatial domain beam index associated with the measurement pilot port group and phase information corresponding to a second spatial domain beam index associated with a reference measurement pilot port group; wherein the first spatial domain beam index and the second spatial domain beam index are identical.

11. The method of claim 8 or 10, wherein, The method further includes: sending second information to the terminal, the second information including information of the spatial domain beam differential phase.

12. The method of claim 9 or 10, wherein, The measurement pilot port group and the reference measurement pilot port group satisfy a first condition; The first condition includes at least one of the following: co-normal; configured or indicated for determining a spatial domain beam differential index; configured or indicated for determining a spatial domain beam differential phase; containing the same number of measurement pilot ports in the same spatial dimension; having the same QCL; corresponding to the same number of spatial domain beams.

13. The method of claim 9 or 10, wherein, The first spatial domain beam index and the second spatial domain beam index are single-dimensional spatial domain beam indexes; Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimensional spatial domain beam indexes.

14. The method of claim 8, wherein, The method further includes: sending one or more measurement pilot port group indication information to the terminal, each of the measurement pilot port group indication information being used to indicate grouping information of measurement pilot ports; wherein the measurement pilot port group indication information included in the first information is measurement pilot port group indication information associated with the CSI.

15. A channel state information transmission apparatus, comprising: a first sending module, configured to send a channel state information (CSI) to a network side device, the CSI being determined according to first information associated with a measurement pilot port group, and / or the CSI including the first information associated with the measurement pilot port group; wherein the first information includes at least one of the following: a spatial domain beam index; a spatial domain beam differential index; a spatial domain beam differential phase; measurement pilot port group indication information.

16. The apparatus of claim 15, wherein, Each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; a spatial domain beam differential index associated with the measurement pilot port group is determined according to a first spatial domain beam index associated with the measurement pilot port group and a second spatial domain beam index associated with a reference measurement pilot port group.

17. The apparatus of claim 15, wherein, Each of the measurement pilot port groups corresponds to a respective reference measurement pilot port group; a spatial domain beam differential phase associated with the measurement pilot port group is determined according to phase information corresponding to a first spatial domain beam index associated with the measurement pilot port group and phase information corresponding to a second spatial domain beam index associated with a reference measurement pilot port group; wherein the first spatial domain beam index and the second spatial domain beam index are identical.

18. The apparatus of claim 15 or 17, wherein, The apparatus further includes: a first receiving module, configured to receive second information sent by the network side device, the second information including information of the spatial domain beam differential phase.

19. The apparatus of claim 16 or 17, wherein, The measurement pilot port group and the reference measurement pilot port group satisfy a first condition; The first condition includes at least one of the following: co-normal; configured or indicated for determining a spatial domain beam differential index; configured or indicated for determining a spatial domain beam differential phase; containing the same number of measurement pilot ports in the same spatial dimension; have the same quasi co-location (QCL); have the same number of corresponding spatial domain beams.

20. The apparatus of claim 16 or 17, wherein, The first spatial domain beam index and the second spatial domain beam index are single-dimension spatial domain beam indexes. Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimension spatial domain beam indexes.

21. The apparatus of claim 15, wherein, The apparatus further includes: The second receiving module is configured to receive one or more measurement pilot port group indication information sent by a network side device, each measurement pilot port group indication information being used to indicate grouping information of measurement pilot ports. The measurement pilot port group indication information included in the first information is measurement pilot port group indication information associated with the CSI.

22. A channel state information transmission apparatus, comprising: The third receiving module is configured to receive a CSI sent by a terminal, the CSI being determined according to first information associated with a measurement pilot port group, and / or the CSI including the first information associated with the measurement pilot port group. The first information includes at least one of the following: a spatial domain beam index; a spatial domain beam difference index; a spatial domain beam difference phase; measurement pilot port group indication information.

23. The apparatus of claim 22, wherein, Each measurement pilot port group corresponds to a respective reference measurement pilot port group. The spatial domain beam difference index associated with the measurement pilot port group is determined according to a first spatial domain beam index associated with the measurement pilot port group and a second spatial domain beam index associated with a reference measurement pilot port group.

24. The apparatus of claim 22, wherein, Each measurement pilot port group corresponds to a respective reference measurement pilot port group. The spatial domain beam difference phase associated with the measurement pilot port group is determined according to phase information corresponding to a first spatial domain beam index associated with the first measurement pilot port group and phase information corresponding to a second spatial domain beam index associated with a reference measurement pilot port group. The first spatial domain beam index and the second spatial domain beam index are the same.

25. The apparatus of claim 22 or 34, wherein, The apparatus further includes: The second sending module is configured to send second information to a terminal, the second information including information of a spatial domain beam difference phase.

26. The apparatus of claim 23 or 24, wherein, The measurement pilot port group and the reference measurement pilot port group satisfy a first condition. The first condition includes at least one of the following: co-normal; configured or indicated to determine a spatial domain beam difference index; configured or indicated to determine a spatial domain beam difference phase; include the same number of measurement pilot ports in the same spatial dimension; have the same quasi co-location (QCL); have the same number of corresponding spatial domain beams.

27. The apparatus of claim 23 or 24, wherein, The first spatial domain beam index and the second spatial domain beam index are single-dimension spatial domain beam indexes. Alternatively, the first spatial domain beam index and the second spatial domain beam index are multi-dimension spatial domain beam indexes.

28. The apparatus of claim 22, wherein, The apparatus further includes: The third sending module is configured to send one or more measurement pilot port group indication information to a terminal, each measurement pilot port group indication information being used to indicate grouping information of measurement pilot ports. The measurement pilot port group indication information included in the first information is measurement pilot port group indication information associated with the CSI.

29. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implement the steps of the channel state information transmission method according to any one of claims 1 to 7.

30. A network side device comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implement the steps of the channel state information transmission method according to any one of claims 8 to 14.

31. A readable storage medium, the readable storage medium storing a program or instructions, the program or instructions, when executed by a processor, implement the channel state information transmission method according to any one of claims 1 to 7, or implement the steps of the channel state information transmission method according to any one of claims 8 to 14.

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