CN117220732A

CN117220732A - Beam management method and device

Info

Publication number: CN117220732A
Application number: CN202311116771.2A
Authority: CN
Inventors: 吴元东; 高昕宇; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2023-12-12

Abstract

The application provides a beam management method and device, and relates to the technical field of wireless communication. In the method, a terminal device receives first information from a first network device, wherein the first information comprises matrix indication information and first weight information of each of K second network devices. Wherein the matrix indication information indicates a matrix with one dimension of (k+1) O or O (k+1). The terminal equipment receives the downlink reference signals and sends second information to the first network equipment, wherein the second information is determined according to the downlink reference signals, the first weight information and the matrix. Based on the above scheme, the terminal device can determine the optimal reflection weights of the K second network devices according to the downlink reference signals, the first weight information and the matrix, and indicate the optimal reflection weights to the network devices through the second information, so that each beam of each second network device does not need to be managed, and the time of beam management is effectively reduced.

Description

Beam management method and device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a beam management method and apparatus.

Background

In an actual communication scenario, shielding of a building and a wall body may cause that a propagation path (LOS path) between an observer and a target does not exist between a terminal device and a base station, and may cause that a User Equipment (UE) receives a poor signal quality, thereby affecting communication performance. The deployment of the intelligent reflecting surface (intelligent reflecting surface, IRS) can enhance the signal quality of the UE and improve the communication performance.

As a low-cost network device, the IRS only includes a passive antenna array plane and a terminal module for receiving control signaling of the macro Station, and it is necessary to switch the reflection weight according to an instruction of a Base Station (BS). Before this, the base station first performs beam management. When the IRS switches different reflection weights, the UE measures the quality of the downlink reference signal and reports the quality, and the base station can obtain the influence on the quality of the UE received signal when the IRS switches different reflection weights, so that the reflection weight greatly improving the quality of the UE received signal is selected for subsequent communication.

Currently, in beam management of an IRS, beam management needs to be performed on a plurality of beams of the IRS, and since beam management requires each beam to scan for a certain time, the beam management of the conventional method takes a long time, which affects communication performance.

Disclosure of Invention

The application provides a beam management method, which aims to reduce the time of beam management.

In a first aspect, a beam management method is provided. The method may be performed by a terminal device or a chip/chip system. In the method, a terminal device receives first information from first network devices, wherein the first information comprises matrix indication information and first weight information of each of K second network devices, and K is a positive integer. The matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O not less than K+1. The terminal equipment receives a plurality of downlink reference signals, and the number of the downlink reference signals is more than or equal to O. When the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and K elements contained in each row of (k+1) elements correspond to K second network devices one by one. Or when the matrix indication information indicates a matrix of (k+1) ×o, one column of the matrix of (k+1) ×o corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and K elements contained in each column of (k+1) elements correspond to K second network devices one by one. The terminal device sends second information to the first network device, wherein the second information is determined according to the plurality of downlink reference signals, the first weight information and the matrix.

Based on the above scheme, the terminal device can determine the optimal reflection weights of the K second network devices according to the downlink reference signals, the first weight information and the matrix, and indicate the optimal reflection weights to the network devices through the second information, so that each beam of each second network device does not need to be managed, and the time of beam management is effectively reduced.

In one possible implementation, the indication information includes at least one of: the dimensions of the matrix, the quantized values of the individual elements of the matrix. Illustratively, the dimensions of the matrix, the quantized values of the individual elements of the matrix are used to determine the matrix. Based on this scheme, the network device may indicate to the terminal device the structure of the matrix and the plurality of elements in the matrix.

In one possible implementation, the terminal device receives third information from the first network device, where the third information is used to indicate the number of weight information corresponding to the second information. The weight information may be indicated by a weight index, an angle quantization value, or an angle index. Based on the scheme, the terminal device can determine the number of weights reported to the network device based on the third information of the network device.

In one possible implementation, the first weight information includes array plane information of the corresponding second network device, and at least one of the following: the method comprises the steps of corresponding L base index information of the second network equipment, corresponding L amplitude coefficients of the second network equipment and corresponding L phase coefficients of the second network equipment. Wherein L is a positive integer. L base index information, L amplitude coefficients, and L phase coefficients are associated with the array plane information.

In one possible implementation, K first power threshold information is received from a first network device. The K pieces of first power threshold information, the first weight information, the matrix and the plurality of downlink reference signals are used for determining second information. The first power threshold information is used to determine whether the second information contains a preset value.

In one possible implementation, a terminal device receives index indication information from a first network device. Wherein the index indication information indicates a plurality of indexes. An index indicates a correspondence, where a correspondence is a correspondence between one of the time-frequency resources corresponding to the plurality of downlink reference signals and a row or column of the matrix.

Based on the scheme, the network device can indicate the corresponding relation between the rows or columns of the matrix and the time-frequency resource to the terminal device through the index indication information.

In one possible implementation, the matrix satisfies the following S, or S is subject to an elementary row or an elementary column variation, where a is a non-zero integer:

based on this scheme, the network device may indicate the dimensions of the matrix to the terminal device, which may determine the structure of the matrix based on S.

It will be appreciated that the matrix may be expressed as In this case, the matrix S' can be considered to be obtained by the first column transformation or the first row transformation of S.

In a second aspect, a beam management method is provided. The method may be performed by the first network device or by a chip/chip system. In the method, first information is sent to terminal equipment, the first information comprises matrix indication information and first weight information of each second network equipment in K second network equipment, K is a positive integer, wherein the matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O and is more than or equal to K+1. The first network device sends a plurality of downlink reference signals to the terminal device, wherein the number of the plurality of downlink reference signals is greater than or equal to O. When the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each row of (k+1) elements includes K elements corresponding to K second network devices one by one. Or when the matrix indication information indicates a matrix of (K+1) ×O, one column of the matrix of (K+1) ×O corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each column of (K+1) elements contains K elements which are in one-to-one correspondence with K second network devices. The first network device receives second information from the terminal device, the second information being determined based on the plurality of downlink reference signals, the first weight information and the matrix.

In one possible implementation, the indication information includes at least one of: the dimensions of the matrix, the quantized values of the individual elements of the matrix. Illustratively, the dimensions of the matrix, the quantized values of the individual elements of the matrix are used to determine the matrix.

In one possible implementation manner, third information is sent to the terminal device, where the third information is used to indicate the number of weight information corresponding to the second information. The weight information may be indicated by a weight index, an angle quantization value, or an angle index.

In one possible implementation, K pieces of first power threshold information are sent to the terminal device. The K pieces of first power threshold information, the first weight information, the matrix and the plurality of downlink reference signals are used for determining second information. The first power threshold information is used to determine whether the second information contains a preset value.

In one possible implementation, the index indication information is sent to the terminal device. Wherein the index indication information indicates a plurality of indexes. An index indicates a correspondence, where a correspondence is a correspondence between one of the time-frequency resources corresponding to the plurality of downlink reference signals and a row or column of the matrix.

In one possible implementation, the first phase information and the first resource indication information are sent to the kth second network device, where the first phase information indicates M first phasesThe first resource indication information is used for indicating M time-frequency resources corresponding to the first phase information, and M time-frequency resources and M first phases +.>M first phases +.>Not all the same, K is taken from 1 to K, and M is a positive integer. Optionally, the first phase +.>Indicated by 1 bit.

In one possible implementation, there are at least two first phases out of the M first phases that are opposite to each other. Wherein, mutually opposite phases can be understood as the phase difference pi of the two phases.

in a third aspect, there is provided a communication apparatus comprising: a processing unit and a transceiver unit.

The receiving and transmitting unit is used for receiving first information from the first network equipment, the first information comprises matrix indication information and first weight information of each second network equipment in the K second network equipment, K is a positive integer, the matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O and is more than or equal to K+1. The receiving and transmitting unit is further used for receiving a plurality of downlink reference signals, and the number of the downlink reference signals is greater than or equal to O. When the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and K elements contained in each row of (k+1) elements correspond to K second network devices one by one. Or when the matrix indication information indicates a matrix of (k+1) ×o, one column of the matrix of (k+1) ×o corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each column of (k+1) elements contains K elements and K second network devices in one-to-one correspondence. And the processing unit is used for determining second information according to the plurality of downlink reference signals, the first weight information and the matrix. And the receiving and transmitting unit is also used for transmitting the second information to the first network equipment.

In a possible implementation manner, the transceiver unit is further configured to receive third information from the first network device, where the third information is used to indicate a number of weight information corresponding to the second information. The weight information may be indicated by a weight index, an angle quantization value, or an angle index.

In a possible implementation, the transceiver unit is further configured to receive K pieces of first power threshold information from the first network device. The K pieces of first power threshold information, the first weight information, the matrix and the plurality of downlink reference signals are used for determining second information. The first power threshold information is used to determine whether the second information contains a preset value.

In a possible implementation manner, the transceiver unit is further configured to receive index indication information from the first network device. Wherein the index indication information indicates a plurality of indexes. An index indicates a correspondence, where a correspondence is a correspondence between one of the time-frequency resources corresponding to the plurality of downlink reference signals and a row or column of the matrix.

in a fourth aspect, there is provided a communication apparatus comprising: a processing unit and a transceiver unit.

And the processing unit is used for generating the first information. And the receiving and transmitting unit is used for transmitting the first information to the terminal equipment. The first information comprises matrix indication information and first weight information of each of K second network devices, wherein K is a positive integer. The matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O not less than K+1. The receiving and transmitting unit is further configured to send a plurality of downlink reference signals to the terminal device, where the number of the plurality of downlink reference signals is greater than or equal to O. When the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each row of (k+1) elements includes K elements corresponding to K second network devices one by one. Or when the matrix indication information indicates a matrix of (K+1) ×O, one column of the matrix of (K+1) ×O corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each column of (K+1) elements contains K elements which are in one-to-one correspondence with K second network devices. And the receiving and transmitting unit is also used for receiving second information from the terminal equipment, wherein the second information is determined according to the plurality of downlink reference signals, the first weight information and the matrix.

In a possible implementation manner, the transceiver unit is further configured to send third information to the terminal device, where the third information is used to indicate the number of weight information corresponding to the second information. The weight information may be indicated by a weight index, an angle quantization value, or an angle index.

In a possible implementation manner, the transceiver unit is further configured to send K pieces of first power threshold information to the terminal device. The K pieces of first power threshold information, the first weight information, the matrix and the plurality of downlink reference signals are used for determining second information. The first power threshold information is used to determine whether the second information contains a preset value.

In a possible implementation manner, the transceiver unit is further configured to send index indication information to the terminal device. Wherein the index indication information indicates a plurality of indexes. An index indicates a correspondence, where a correspondence is a correspondence between one of the time-frequency resources corresponding to the plurality of downlink reference signals and a row or column of the matrix.

In a possible implementation manner, the transceiver unit is further configured to send first phase information and first resource indication information to the kth second network device, where the first phase information indicates M first phasesThe first resource indication information is used for indicating the firstM time-frequency resources corresponding to the phase information, and M time-frequency resources and M first phases +.>M first phases +.>Not all the same, K is taken from 1 to K, and M is a positive integer. Optionally, the first phase +.>Indicated by 1 bit.

In one possible implementation, there are at least two first phases out of the M first phases that are opposite to each other.

in a fifth aspect, the present application provides a communications device comprising a processor, the processor being coupled to a memory, the memory being for storing a computer program or instructions, the processor being for executing the computer program or instructions to perform the respective implementation methods of the first and second aspects described above. The memory may be located within the device or may be located external to the device. The number of processors is one or more.

In a sixth aspect, the present application provides a communication apparatus comprising: a processor and interface circuitry for communicating with other devices, the processor being for implementing the methods of the first and second aspects described above.

In a seventh aspect, a communication device is provided. The apparatus includes a logic circuit and an input-output interface. The logic circuit is configured to perform operations performed by the terminal device and the first network device of the implementation methods of the first aspect and the second aspect. And the input-output interface is used for communicating with other communication devices.

In an eighth aspect, the present application provides a communication system comprising: terminal equipment and first network equipment for executing the implementation methods of the first aspect and the second aspect, and K second network equipment.

In a ninth aspect, the present application further provides a chip system, including: a processor, configured to perform each implementation method of the first aspect and the second aspect.

In a tenth aspect, the present application also provides a computer program product comprising computer-executable instructions which, when run on a computer, cause the implementation of the methods of the first and second aspects described above to be performed.

In an eleventh aspect, the present application further provides a computer readable storage medium having stored therein a computer program or instructions which, when run on a computer, implement the respective implementation methods of the first and second aspects described above.

The technical effects achieved by the second to eleventh aspects described above may refer to the technical effects of the first aspect, and the description thereof will not be repeated here.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of yet another communication system according to an embodiment of the present application;

fig. 3 is an exemplary flowchart of a beam management method according to an embodiment of the present application;

fig. 4 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 5 is a schematic diagram of another communication device according to an embodiment of the present application;

fig. 6 is a schematic diagram of yet another communication device according to an embodiment of the present application;

fig. 7 is a schematic diagram of another communication device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in detail below with reference to the drawings attached to the specification.

The technical solution of the embodiment of the present application may be applied to a New Radio (NR) system, a long term evolution (Long Term Evolution, LTE) system, an LTE frequency division duplex (Frequency Division Duplex, FDD) system, an LTE time division duplex (Time Division Duplex, TDD), a worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, and the like, which is not limited herein.

Fig. 1 is a schematic architecture diagram of a communication system 1000 to which an embodiment of the application applies. As shown in fig. 1, the communication system includes a radio access network 100. The radio access network 100 may include at least one network device (e.g., 110a and/or 110b in fig. 1) and may also include at least one terminal device (e.g., at least one of 120a-120j in fig. 1). The terminal device is connected with the access network equipment in a wireless mode, and the access network equipment is connected with the core network equipment in a wireless or wired mode. The terminal apparatus and the network device may be connected to each other by a wired or wireless connection. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1.

The network device is a network side device with wireless transceiving function. The network device may be an apparatus in a radio access network (radio access network, RAN) that provides wireless communication functionality for the terminal device, referred to as a RAN device. For example, the network device may be a base station (base station), an evolved NodeB (eNB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB) in a fifth generation (5th generation,5G) mobile communication system, a next generation base station in a sixth generation (6th generation,6G) mobile communication system, a base station in a future mobile communication system, or an access node in a Wi-Fi system, etc.; the present application may also be a module or unit that performs a function of a base station part, for example, a Central Unit (CU) or a Distributed Unit (DU). The CU can complete the functions of a radio resource control protocol and a packet data convergence layer protocol (packet data convergence protocol, PDCP) of the base station and can also complete the functions of a service data adaptation protocol (service data adaptation protocol, SDAP); the DU performs the functions of the radio link control layer and the medium access control (medium access control, MAC) layer of the base station, and may also perform the functions of a part of the physical layer or the entire physical layer, and for a detailed description of the above protocol layers, reference may be made to the relevant technical specifications of the third generation partnership project (3rd generation partnership project,3GPP). The network device may be a macro base station (e.g., 110a in fig. 1), a micro base station or an indoor station (e.g., 110b in fig. 1), a relay node or a donor node, etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the network equipment. In the embodiment of the application, the base station is taken as the network equipment for illustration.

In another possible scenario, a plurality of RAN nodes cooperate to assist a terminal in implementing radio access, and different RAN nodes implement part of the functions of a base station, respectively. For example, the RAN node may be a CU, DU, CU-Control Plane (CP), CU-User Plane (UP), or Radio Unit (RU), etc. The CUs and DUs may be provided separately or may be included in the same network element, e.g. in a baseband unit (BBU). The RU may be included in a radio frequency device or unit, such as in a remote radio unit (remote radio unit, RRU), an active antenna processing unit (active antenna unit, AAU), or a remote radio head (remote radio head, RRH).

In different systems, CUs (or CU-CP and CU-UP), DUs or RUs may also have different names, but the meaning will be understood by those skilled in the art. For example, in an ORAN system, a CU may also be referred to as an O-CU (open CU), a DU may also be referred to as an O-DU, a CU-CP may also be referred to as an O-CU-CP, a CU-UP may also be referred to as an O-CU-UP, and a RU may also be referred to as an O-RU. For convenience of description, the present application is described by taking CU, CU-CP, CU-UP, DU and RU as examples. Any unit of CU (or CU-CP, CU-UP), DU and RU in the present application may be implemented by a software module, a hardware module, or a combination of software and hardware modules.

The terminal equipment is user side equipment with wireless receiving and transmitting functions. The terminal device may also be referred to as a User Equipment (UE), mobile station, mobile terminal, etc. The terminal device may be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-device (vehicle to everything, V2X) communication, machine-type communication (MTC), internet of things (internet of things, IOT), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal device can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a wearable device, a vehicle, an unmanned aerial vehicle, a helicopter, an airplane, a ship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the present application does not limit the specific technology and the specific device configuration adopted by the terminal device. The embodiment of the application is illustrated by taking a terminal as terminal equipment.

The network device and the terminal device may be fixed in location or may be mobile. Network devices and terminal devices may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. The embodiment of the application does not limit the application scenes of the network equipment and the terminal equipment.

The roles of network devices and terminal devices may be relative, e.g., helicopter or drone 120i in fig. 1 may be configured as a mobile network device, terminal device 120i being a network device for those terminal devices 120j that access radio access network 100 through 120 i; but for network device 110a 120i is a terminal device, i.e. communication between 110a and 120i is via a wireless air interface protocol. Of course, communication between 110a and 120i may also be performed via an interface protocol between network devices, in which case 120i is also a network device with respect to 110 a. Thus, both the network device and the terminal device may be collectively referred to as a communication apparatus, 110a and 110b in fig. 1 may be referred to as a communication apparatus having a network device function, and 120a-120j in fig. 1 may be referred to as a communication apparatus having a terminal device function.

In the embodiment of the present application, the functions of the network device may be performed by modules (such as chips) in the network device, or may be performed by a control subsystem including the functions of the network device. The control subsystem including the network device function may be a control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal device may be performed by a module (e.g., a chip or a modem) in the terminal device, or may be performed by an apparatus including the functions of the terminal device.

In an actual communication scene, a propagation path (LOS path) between a target and an observer does not exist between the terminal equipment and the base station due to shielding of a building and a wall body, and the quality of a received signal of the UE is possibly poor, so that the communication performance is affected. The deployment of the intelligent reflecting surface (intelligent reflecting surface, IRS) can enhance the signal quality of the UE and improve the communication performance.

The IRS is a passive reflective array surface, which has no signal receiving module and no power amplifier, and only has the capability of regulating the reflective phase of each array element. The method can change the direction of the reflected beam by adjusting the phase distribution of the surface of the reflecting surface, thereby reflecting the signal transmitted to the IRS by the BS to the expected direction, and further realizing the functions of improving the environment of the channel in the weak coverage area, improving the NLOS path to the LOS path, and the like. IRS is considered as one of key technologies of next generation mobile communication networks because it can improve channel conditions of weak coverage areas at low cost. Referring to FIG. 2, a schematic diagram of an architecture for deploying an IRS to which embodiments of the application are applicable is shown

As a low cost network device, the IRS contains only a passive antenna array plane and a terminal module for receiving control signaling of the macro station, and it is necessary to switch the reflection weight according to the instruction of the BS. Before that, the base station first performs beam management on the IRS, and accordingly obtains a reflected beam that the IRS has gain on the UE. When the IRS switches different reflection weights, the UE measures the quality of the downlink reference signal and reports the quality, and the base station can obtain the influence on the quality of the UE received signal when the IRS switches different reflection weights, so that the reflection weight greatly improving the quality of the UE received signal is selected for subsequent communication.

Because the IRS is used as a passive reflective array surface and has no power amplification capability, in order to ensure the intensity of the reflected signal, the IRS needs to be increased in size, because after the IRS is increased in size, the IRS has more array elements to reflect the signal in space, so that the beam gain becomes larger, thereby ensuring that the intensity of the reflected signal is large. A larger number of array elements results in a larger beam gain and a smaller beam width. The typical beamwidth is defined as the angle between the two directions of 3dB power drop on either side of the maximum radiation direction. The smaller beam width results in the same angle being scanned and the number of beams required is greater. Since beam management requires each beam to be scanned for a certain time, an increase in the number of scanned beams results in a longer beam management time, which affects communication performance.

In view of this, an embodiment of the present application provides a beam management method. In the method, a terminal device receives first information from a first network device. The first information may include matrix indication information and first weight information of each of the K second network devices. The first weight information may indicate weights of K IRSs, or reflection weights of K IRSs. The matrix indication information may indicate a matrix of (k+1) O or O (k+1), and the rank of the matrix is k+1. The terminal device may receive a plurality of downlink reference signals. When the matrix indication information indicates a matrix of O (k+1), one row of the matrix corresponds to one of the time-frequency resources corresponding to the downlink reference signals, and each row of (k+1) elements contains K elements corresponding to the K second network devices one by one. Or when the matrix indication information indicates a matrix of (K+1) x O, one column of the matrix corresponds to one of the time-frequency resources corresponding to the downlink reference signals, and each column of (K+1) elements comprises K elements which are in one-to-one correspondence with K second network devices. The terminal equipment determines second information based on the downlink reference signals, the first weight information and the matrix, and sends the second information to the network equipment.

Based on the above scheme, the terminal device can determine the optimal reflection weights of the K second network devices according to the downlink reference signals, the first weight information and the matrix, and indicate the optimal reflection weights to the network devices through the second information.

Referring to fig. 3, an exemplary flowchart of a beam management method according to an embodiment of the present application may include the following operations. In the embodiment shown in fig. 3, the first network device may be a base station as shown in fig. 2, and the second network device may be an IRS as shown in fig. 2, or a base station.

S301: the base station transmits the first information to the terminal device.

Correspondingly, the terminal device receives the first information from the base station.

The first information may include matrix indication information and first weight information of each of the K IRSs. In one example, each first weight information may contain information of the IRS, such as one or more of an identification/index of the IRS and array plane information of the IRS.

The array plane information of the IRS comprises a horizontal dimension array element number N and a vertical dimension array element number M, and the terminal equipment can determine a substrate matrix D of the IRS according to a predefined relation, wherein the (i-1) th M+k column is recorded as N _IRS =n×m, wherein,

in a possible scenario, the first weight information may indicate a weight of the corresponding IRS, or a reflection weight of the corresponding IRS.

In another possible scenario, the first weight information may indicate L base index information corresponding to the IRS, L amplitude coefficients corresponding to the IRS, L phase coefficients corresponding to the IRS. Wherein the L base index information, the L amplitude information, and the L phase coefficients may be used to determine weights of IRSs corresponding to the IRSs. It is understood that L base index information, L amplitude information, and L phase coefficients may be associated with the array plane information of the corresponding IRS.

Illustratively, the first base index information, the first amplitude coefficient, and the first phase coefficient are denoted as i, respectively _l 、α _l 、φ _l The weight of the kth IRS may be determined

Illustratively, when L is 1,can be expressed as +.>Or->Or->Or->

It should be understood that the above formula is illustrated by taking L as 0 to L-1, that is, taking the initial value of L as 0 as an example, and in fact, the initial value of L is 1, that is, taking L as 1 to L, which is not particularly limited in the present application.

In one example, the first information may further include indication information of time-frequency resources corresponding to the first weight information. For example, the indication information may indicate a time-frequency resource, and indicate first weight information corresponding to the time-frequency resource, where the first weight information corresponds to an IRS, such as IRS 1. The weight adopted by the IRS1 is the weight indicated by the first weight information when the terminal device can be sent by the IRS1 according to the downlink reference signal on the one time-frequency resource. Based on the indication information, the terminal device may determine weights employed by the K IRSs.

Optionally, for each IRS, at least two time-frequency resource corresponding weight phases exist in the multiple time-frequency resource corresponding weights, where the phases of the time-frequency resource corresponding weights are opposite to each other. Where the phases are opposite to each other, it is understood that the phases are different by pi, e.g., the phases 0 and pi are opposite to each other. For example, in the case of a single IRS, the base stations are respectively on time-frequency resources t ₁ And t2, the IRS may also transmit a reference signal at t ₁ And t ₂ And receiving the reference signal of the base station and transmitting the reference signal. At t ₁ And t ₂ On the one hand, the weights of the single IRS are inverted, e.g. at t ₁ Upper is phi, at t ₂ The upper part is-phi. Therefore, optionally, in the embodiment of the present application, the first weight information may indicate a weight associated with each time-frequency resource of the K IRSs, or may also indicate a weight associated with a part of the time-frequency resources, and the weights associated with the rest of the time-frequency resources that are not indicated may be weights associated with the indicated weights.

In the embodiment of the present application, the matrix indication information may indicate (k+1) O or O (k+1), and the rank is a matrix of k+1. O is more than or equal to K+1. For example, in the case where K has a value of 2, the matrix may be 3*O or a matrix of o×3, where O may be greater than or equal to 3, for example, may be 4, 5, etc.

In a possible case, when the matrix indication information indicates a matrix of (k+1) ×o, a column of the matrix of (k+1) ×o corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each column of (k+1) elements includes K elements in one-to-one correspondence with K IRSs. For example, in the case where the number of the plurality of downlink reference signals is O and one time-frequency resource carries one downlink reference signal, the O columns of the matrix may be in one-to-one correspondence with the O time-frequency resources of the O downlink reference signals. It will be appreciated that where the number of downlink reference signals is greater than O, e.g., o+j, and one time-frequency resource carries one downlink reference signal, the number of time-frequency resources is also greater than O, e.g., o+j. In this case, the O columns of the matrix may correspond to the O time-frequency resources one by one, and the remaining J time-frequency resources may also correspond to the J columns of the O columns of the matrix one by one, such as the previous J columns. Where J may be equal to O or less than O.

In addition, each column of (k+1) elements contains K elements in one-to-one correspondence with K IRSs, which may be that the first K elements in one-to-one correspondence with K second network devices, or that the last K elements in one-to-one correspondence with K IRSs, or that any K elements in the k+1 elements in one-to-one correspondence with K IRSs.

In one possible implementation, the correspondence between the matrix array of (k+1) O and the time-frequency resources corresponding to the plurality of downlink reference signals may be predefined. The correspondence between K elements and K IRSs contained in each column of (k+1) elements may be predefined. For example, assume that the matrix isIn case the number of K is 2 and the number of downlink reference signals is 3, the first column of the predefined matrix may correspond to IRS1 and the second column may correspond to IRS2. In the matrix S, a first row may correspond to a first time-frequency resource of the time-frequency resources corresponding to the plurality of downlink reference signals, a second row may correspond to a second time-frequency resource of the time-frequency resources corresponding to the plurality of downlink reference signals, and a third row may correspond to a third time-frequency resource of the time-frequency resources corresponding to the plurality of downlink reference signals.

Illustratively, where the number of K is 2 and the number of downlink reference signals is 6, a first column of the predefined matrix may correspond to IRS1 and a second column may correspond to IRS2. In the matrix S, a first row may correspond to a first time-frequency resource and a fourth time-frequency resource of the time-frequency resources corresponding to the plurality of downlink reference signals, a second row may correspond to a second time-frequency resource and a fifth time-frequency resource of the time-frequency resources corresponding to the plurality of downlink reference signals, and a third row may correspond to a third time-frequency resource and a sixth time-frequency resource of the time-frequency resources corresponding to the plurality of downlink reference signals.

In another possible implementation, the correspondence between the matrix array of (k+1) O and the time-frequency resources corresponding to the plurality of downlink reference signals may be indicated by the base station. The correspondence between K elements and K IRSs contained in each column of (k+1) elements may be predefined. For example, the base station may transmit index indication information to the terminal device, which may indicate a plurality of indexes. One index may indicate a correspondence, where the correspondence may be a correspondence between one of the time-frequency resources corresponding to the plurality of downlink reference signals and one column of the matrix of (k+1) x O.

For example, assume that the matrix isIn case the number of K is 2 and the number of downlink reference signals is 3, the first column of the predefined matrix may correspond to IRS1 and the second column may correspond to IRS2. The base station receives index indication information, for example, the index indication information indicates "0", "1" and "2", respectively, and may predefine a correspondence relationship between the plurality of indexes and time-frequency resources of the plurality of downlink reference signals, for example, the index "0" corresponds to a first time-frequency resource in the time-frequency resources of the plurality of downlink reference signals, the index "1" corresponds to a second time-frequency resource in the time-frequency resources of the plurality of downlink reference signals, and the index "2" corresponds to a third time-frequency resource in the time-frequency resources of the plurality of downlink reference signals. In addition, the index may also indicate a matrix column, such as index "0" may indicate a first column of the matrix, index "1" may indicate a second column of the matrix, and index "2" may indicate a third column of the matrix. In this way, the terminal device can determine the corresponding relationship between the matrix array of (k+1) x O and the time-frequency resources corresponding to the downlink reference signals through the index indication information.

In another possible case, when the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each row of (k+1) elements includes K elements in one-to-one correspondence with K IRSs. The correspondence between the rows of the matrix and the time-frequency resources, and the correspondence between K elements in each row and K IRSs may refer to the correspondence between the columns of the matrix of the (k+1) x O matrix and the time-frequency resources, and the correspondence between K elements in each column and K IRSs, which are not described herein.

In a possible case, the terminal device and the base station may configure a calculation formula of the matrix in advance, and the dimension of the notification matrix may obtain the form of the matrix according to the predefined formula. The matrix indication information may indicate a dimension of the matrix. In this way, the terminal device can determine the matrix indicated by the base station according to the dimension of the matrix.

Optionally, in the embodiment of the present application, at least K columns of the (k+1) columns included in the matrix are different, and each of the K columns includes only the element X _k,1 And element X _k,2 Or at least K rows of the (K+1) rows contained in the matrix are different, and each row of the K rows contains only the element X _k,1 And element X _k,2 . For example, o=k+1, element X _k,1 And element X _k,2 Are all integers and element X _k,1 Element X with the symbol- _k,2 。

Illustratively, the matrix may be determined by the expression shown in S:

wherein A is a non-zero integer. As can be seen from S, the matrix contains the element X _k,1 May be A or 0, and the like element X _k,2 May be a or 0. For example, element X _k,1 In the case of A, element X _k,2 Is 0, that is to say that the K columns or K rows of the matrix contain only two elements a and 0.

As another example of this, and as another example,

element X _k,1 In the case of A, element X _k,2 Is-a, that is, the K columns or rows of the matrix contain only two elements-a and a.

As another example of this, and as another example,

element X _k,1 In the case of 0, element X _k,2 For a, that is to say that the K columns or K rows of the matrix contain only two elements 0 and a.

It can be understood that in the embodiment of the present application, the matrix may be a matrix shown in S, or a matrix in which S is changed by elementary rows or elementary columns.

A=1 and k=2 will be described as an example. Since k=2, the matrix may be a 3*3 matrix having at least two rows or columns which are not identical and which contain only element 1 and element-1, or element 1 and element 0, or elements-1 and 0, as the matrix It will be appreciated that this matrix S is shown by way of example only, and is not intended to limit the configuration of the matrix set forth in the embodiments of the application in order to facilitate understanding of the matrix set forth in the embodiments of the application.

Optionally, in the manner of determining the matrix by S, the matrix indication information may indicate that the dimension of the matrix is K, and then the terminal device may determine that the dimension of the matrix is a matrix of (k+1) × (k+1).

In another possible case, the matrix indication information may indicate a dimension of the matrix and quantized values of respective elements of the matrix. That is, the matrix indication information may indicate elements of the respective positions of the matrices. For example, the matrix indication information may indicate k+1 and O, and the terminal device may determine that the matrix is a matrix of (k+1) x O or O x (k+1). For another example, the matrix indication information may indicate O and k+1, and the terminal device may determine that the matrix is O (k+1) or (k+1) O.

Alternatively, the matrix indication information may be predefined with the first few bits indicating the rows of the matrix, the last few bits indicating the columns of the matrix, or the first few bits indicating the columns of the matrix, the last few bits indicating the rows of the matrix. For example, in the case where the first few bits of the predefined matrix indication information indicate rows of the matrix and the last few bits indicate columns of the matrix, the terminal device may consider the matrix as a matrix of (k+1) ×o if the matrix indication information indicates k+1 and O. If the predefined matrix indication information indicates the first few bits to indicate the columns of the matrix and the last few bits to indicate the rows of the matrix, the matrix indication information indicates k+1 and O, the terminal device may consider the matrix as a matrix of O x (k+1).

In one scenario, the operation of the base station generating the first information may be performed by the CU, the operation of the base station transmitting the first information may be performed by the DU, and the CU may transmit the generated first information to the DU. In another scenario, the operation of the base station generating the first information may be performed by the CU-CP, the operation of the base station transmitting the first information may be performed by the DU, and the CU-CP transmits the generated first information to the DU. Alternatively, the DU may transmit the first information through the RU.

S302: the base station transmits a plurality of downlink reference signals.

Correspondingly, the terminal equipment receives a plurality of downlink reference signals.

It is understood that the plurality of downlink reference signals received by the terminal device may include downlink reference signals received from the base station, or may include downlink reference signals reflected by K IRSs.

In the embodiment of the present application, the weights when the K IRSs send the downlink reference signals may be indicated by the base station. For example, the base station may send weight information to the K IRSs to indicate weights of the K IRSs, and send resource indication information to the K IRSs to indicate time-frequency resources corresponding to the weights of the K IRSs, respectively.

For example, the embodiment shown in fig. 3 may further include S304.

S304: the base station may send K first phase information and K first resource indication information to K IRSs.

Accordingly, the K IRSs may receive K first phase information and K first resource indication information from the base station.

For example, the base station may send a first phase information and a first resource indication information to the kth IRS. It is understood that S304 may be performed prior to S302.

Wherein the first phase information may indicate a kth IM first phases of RSThe first resource indication information may indicate M time-frequency resources corresponding to the first phase information, and M time-frequency resources and M first phases ∈>Correspondence between them.

It can be appreciated that the corresponding relationship between the time-frequency resource and the weight can be understood that the kth IRS can be based on the first phaseFirst weight value phi _k And adjusting the first time to send the downlink reference signal received on the corresponding time-frequency resource to the terminal equipment, namely, when the corresponding relation between the time-frequency resource and the first phase can indicate to send the downlink reference signal received on a certain time-frequency resource, the working state of the kth IRS. The kth IRS may be based on the first phase according to the instruction of the base station>The adjustment of the downlink reference signal on the corresponding time-frequency resource corresponding to the reflection may be performed with reference to the time-frequency resource corresponding to the first weight information, which is not described herein.

Similarly, for each IRS, there is a phase difference pi between at least two time-frequency resource corresponding weights in the multiple time-frequency resource corresponding weights, which is not described herein.

The first phase information sent by the base station to the IRS and the M time-frequency resources corresponding to the first phase information need to be the same as the first weight information sent by the base station to the terminal device and the time-frequency resources corresponding to the first weight information. Optionally, the M weights are not all the same.

In one scenario, the operation of the base station to generate the downlink reference signal may be performed by CU, the operation of the base station to transmit the downlink reference signal may be performed by DU, and the CU may transmit the generated downlink reference signal to the DU. In another scenario, the operation of the base station to generate the downlink reference signal may be performed by CU-UP, the operation of the base station to transmit the downlink reference signal may be performed by DU, and the CU-UP transmits the generated downlink reference signal to the DU. Alternatively, the DU may transmit the downlink reference signal through the RU.

S303: the terminal device sends the second information to the base station.

Correspondingly, the base station receives the second information from the terminal device.

The terminal device may determine the second information according to the received downlink reference signals, the first weight information and the matrix. The matrix may indicate a processing manner of the terminal device on the plurality of downlink reference signals, and the first weight information may indicate a working state when the corresponding IRS sends the downlink reference signals.

Optionally, the terminal device may also receive third information from the base station before sending the second information. Wherein the third information may indicate the number of weight information corresponding to the second information. For example, the number of weight information corresponding to the second information sent by the terminal device may be the same as or less than the number indicated by the third information. In a possible case, the second information may contain a weight index, an angle quantization value, or an angle index, that is, the weight information may be indicated by the weight index, the angle quantization value, or the angle index.

In one scenario, the operation of the base station to receive the second information may be performed by a DU, which may send the received second information to the CU. In another scenario, the operation of the base station to receive the second information may be performed by a DU, which may send the second information to the CU-CP and CU-UP. Alternatively, the DU may receive the second information through the RU.

The way in which the terminal device determines the second information is described below.

Assuming K IRSs are deployed per sector, then for one terminal device, downlink reference signals from multiple devices will be received, including downlink reference signals directly from the direct channel of the base station, as well as downlink reference signals from the reflected channel of the base station-IRS-terminal device.

It should be noted that since there are K IRSs in each sector, the terminal device can receive multiple reflection channels of the sector, such as the downlink reference signal. In the embodiment of the application, the terminal equipment does not consider the signals from the base station of the adjacent sector and does not consider the signals reflected by the IRS of the adjacent sector.

At the t-th time-frequency resource, ideally, the signal received by the terminal device may be represented by the following formula (3):

for each channel segment, the time for the base station to transmit the downlink reference signal is designed, and at this time, the time interval for the base station to transmit the signal is short, so that the channel is considered to be approximately unchanged, and therefore, in the description of the channel, the time subscript t is omitted.

Wherein,for pilot signal, ++>Is a precoding matrix>For the direct channel from base station to terminal device, < >>For the kth IRS to terminal device channel, and (2)>For the weight of the kth IRS in the tth time-frequency resource, +.>Is the channel from the base station to the kth IRS, wherein K is equal to or greater than 1 and is equal to or less than K.

In the t time-frequency resource, the base station transmits CSI-RS signals, if only the k IRS is considered, the base station has

For the above signals, assuming that the terminal device is a single-receiving antenna, there are

Wherein the method comprises the steps ofThe vector expression form of the weight of the kth IRS is as follows W for the kth IRS to terminal device channel _k And generating a precoding matrix for the base station according to the kth IRS.

In one possible scenario, if K is 1, i.e. in case of a single IRS, the terminal device may cancel the interference of the signal of the direct channel from the base station and obtain the optimal weight of the single IRS in the following way. When there are only 1 IRS, the signals received by the terminal device come from the direct and reflected channels, respectively. Analyzing the optimal weights of the IRS from the received signal requires the interference of the direct channel to be eliminated.

One possible approach is at t ₁ Time-frequency resource and t ₂ The weight of the kth IRS is respectively defined as the time-frequency resourceAnd->Then simultaneous equations can be obtained

That is, the first phase information that the base station can send to the IRS is e ^j0 And e ^jπ (i.e., the first phase information is 1 and-1, respectively), and is respectively associated with the t < th > ₁ Time-frequency resource and t ₂ And the time-frequency resources correspond. Similarly, the first weight information sent by the base station to the terminal equipment is e ^j0 And e ^jπ And respectively with the t ₁ Time-frequency resource and t ₂ And the time-frequency resources correspond.

Subtracting the two formulas to obtain the reflection channel of the kth IRS, which is recorded as

For each channel, it can be represented by an outgoing end outgoing steering vector, a incoming end incoming steering vector at various angles, i.e.,

wherein beta is ₁ 、β ₂ The large scale coefficients of the channels at the two ends of the base station-IRS and IRS-terminal equipment are respectively,the outgoing guide vector and the incoming guide vector of the channel of the base station-IRS are respectively shown, j represents the j-th angle,>and (3) the emergent guiding vector of the IRS-terminal equipment channel. In the above example, it is assumed that the terminal device has a single antenna, and the incident steering vector is omitted.

Let W for precoding matrix _k ＝a _BS ，β＝β ₁ β ₂ Then there is

Is a selection vector. This equation is understood to be equivalent to the left equation by selecting a number of column additions within A by ψ, with

Order theThen there is

In response to this problem,is a vector +.>And the product of the column vectors of one substrate a. For each column vector of vector base a, its physical meaning is a set of multiple orthogonal weights for the IRS.

Due to channel sparsity caused by the increase of communication frequency band and the narrowing of IRS wave beam, deltay can be considered as _k Affected by only the individual reflected beams of the IRS, i.e. considered to be affected by Θ _t,k Is a function of the individual columns of the column.

Then for the followingTerminal device solves optimization problem psi=argmin iiψiil ₀ I.e. to minimize non-0 positions in ψ, then ψ can be obtained. Where ψ is a number of positions containing many values of 0 and a few positions other than 0. Wherein the non-zero position column index corresponds to IRS having influence on terminal equipmentIs a second information of (a).

It should be noted that, the method for solving the optimization problem by the terminal device is not particularly limited. In the following, the way in which the terminal device solves the optimization problem is exemplarily shown. For the optimization problem ψ=argmin iia ii ₀ The solution can be found by the following orthogonal matching pursuit (orthogonal matching pusuit, OMP) algorithm:

first, the terminal device may initialize B ₀ ＝{null},l＝0,r ₀ ＝Δy _k K. Where K is sparsity, indicated by the base station. Next, the terminal device may repeat the following operation until l=k.

Wherein the terminal equipment makes l=l+1,terminal device determines residual r _l-1 In (B) ₀ The element in the rule corresponds to the index of the optimal weight of the IRS, and the second information reports the index of the optimal weight.

By way of example, the orthogonal basis a may be a DFT basis, which may be represented as follows: for IRS array surface, the number of horizontal dimension array elements is recorded as N, and the number of vertical dimension array elements is recorded as M, then DFT vectors u and v are respectively recorded as

Then for the (i-1) th M+k column of matrix A, which is obtained by the horizontal ith, vertical jth DFT vector

N _IRS =n×m formula (16)

In the above operation, IRS dual polarization is not considered.

Exemplary, the index of the optimal weight value reported by the second information is denoted as q, and the second information may also report the angle corresponding to the optimal weight valueθ _v Is included in the quantized value of (2). For->There is->Wherein ρ is _pre Is a predefined threshold.

Exemplary, the index of the optimal weight value reported by the second information is denoted as q, and the second information may also report the angle corresponding to the optimal weight valueCorresponding indexes (h 1, v 1) in the predefined angle set.

The second information may be used to report the index of the weight, or the angle corresponding to the weight, or the number of indexes of the angle, which may be determined according to the third information. For example, the third information indicates that two weight information are reported, and the second information may be { q1, q2}, orOr { (h 1, v 1), (h 2, v 2) }.

Illustratively, the second information may be represented by a bitmap. For example, the index q=16 may be represented by 00010000.

Based on the above, a way of determining the second information by the terminal device in case of a single IRS is presented. In the following, the manner in which the terminal device determines the second information in case of a plurality of IRSs, e.g. K IRSs, is described. When K IRSs exist in the network, if the reflection channel of each IRS can be obtained respectively, the terminal equipment obtains the optimal weight of each IRS respectively in a mode of solving the optimization problem under the condition of single IRS. Thus, the problem translates into how to rely on signals from multiple IRSs:

Obtaining a signal from a reflection channel of a kth IRS:

in the following, it is given that in case there are 2 IRSs in the network, the reflected channel signal from the 1 st IRS is obtained by a plurality of measurements.

At t ₁ The reflection weights of IRS1 and IRS2 are divided into time-frequency resourcesThen there is

At t ₂ The reflection weights of IRS1 and IRS2 are divided into time-frequency resourcesThen there is

That is, the first weight information that the base station can send to the IRS1 isFirst of allPhase information 1, -1. First weight information->And t ₁ Time-frequency resource and t ₂ Corresponding time-frequency resources, and the first phase information 1, -1 is respectively corresponding to the t ₁ Time-frequency resource and t ₂ And the time-frequency resources correspond. Similarly, the first weight information sent to IRS2 is +.>And first phase information 1, 1. First weight information->And t ₁ Time-frequency resource and t ₂ Corresponding time-frequency resources, and the first phase information 1, 1 respectively correspond to the t ₁ Time-frequency resource and t ₂ And the time-frequency resources correspond. Similarly, the base station transmits the first weight information of IRS1 to the terminal device as +.>IRS2 first weight information is +.>And will not be described in detail herein.

Then there is

Since DeltaY is known ₁ According to the method for solving the optimization problem under the condition of single IRS, the terminal equipment can obtain the optimal weight set I of IRS1 ₁ And an optimal weight set I for IRS2 ₂ And will not be described in detail herein.

In the embodiment of the application, the information of the optimal weights of the K IRSs, namely the second information, can be acquired through the process terminal equipment.

In one possible implementation, the aboveIn the process, how the terminal device determines which downlink reference signal received on the time-frequency resource is subtracted from which downlink reference signal received on the time-frequency resource to reserve a signal received by the IRS may be determined according to the first weight information and the indication information of the time-frequency resource associated with the first weight information. As known from S301, the first information may indicate a time-frequency resource corresponding to the first weight information. In this way, the terminal device can determine the weight adopted by K IRSs in each time-frequency resource according to the corresponding relation between the time-frequency resource and the first weight information, and record the weight asTwo time-frequency resources with pi phase difference of weight of kth IRS are marked as t ₁ And t ₂ The received downlink reference signals are subtracted to preserve the signal reflected from the kth IRS, wherein the weight of the kth IRS satisfies +.>

In another possible implementation manner, the first weight information is used to indicate weights of the K IRSs, and the matrix may indicate phases of the weights indicated by the first weight information. Wherein, K columns of the matrix or K rows of the matrix may be in one-to-one correspondence with K phase distributions of the IRS. For example, a row or column of the matrix may correspond to K IRSs, and the remaining row or column of the matrix may be understood to correspond to the base station. Assuming that in the case where the element of the matrix is a, the first phase can be considered as e ^j0 (i.e., positive phase), i.e., the weight of the kth IRS isWhen the element is-A or 0, the first phase is considered to be e ^jπ (i.e. phase is negative), i.e. the weight of the kth IRS is +.>Conversely, in the case where the element of the matrix is-A, the weight of the kth IRS can be considered as +.>When the element is A or 0, the weight of the kth IRS is +.>The present application is not particularly limited.

In a possible case, the correspondence of each row or each column of the matrix to the time-frequency resource may be predefined. For example, in the case where each column of the matrix corresponds to K IRSs and the base station, the correspondence of each row to the time-frequency resource may be predefined. For another example, in the case where each row of the matrix corresponds to K IRSs and base stations, the correspondence of each column to time-frequency resources may be predefined.

For example, assume that the matrix isThe first row of the matrix corresponds to IRS1, the second row corresponds to the base station, the third row corresponds to IRS2, furthermore the predefined first column corresponds to the first time-frequency resource, the second column of the matrix corresponds to the second time-frequency resource, and so on. The weights of IRS1 and IRS2 can be indicated by the first weight information, respectively +.>And->It can be seen from the matrix S that the weight of IRS1 on the first time-frequency resource is +. >The phase is positive and the weight of IRS2 isThe phase is negative. Similarly, in the second time-frequency resourceThe weight of IRS1 is +.>The phase is positive and the weight of IRS2 is +.>The phase is positive, and on the third time-frequency resource, the weight of IRS1 is +.>The phase is negative and the weight of IRS2 is +.>The phase is positive.

In this way, if the terminal device subtracts the downlink reference signal received on the first time-frequency resource from the downlink reference signal received on the second time-frequency resource, it is possible to cancel the interference of the reflected signal from IRS1 and the signal from the base station, and only the signal received from IRS2 is retained. Similarly, if the interference of the reflected signal from IRS1 and the signal from the base station is eliminated, only the signal received from IRS1 is retained, the downlink reference signal received on the second time-frequency resource may be subtracted from the downlink reference signal received on the third time-frequency resource.

In another possible case, the base station may transmit index information indicating a plurality of indexes to the terminal device. Wherein an index is associated with one of the time-frequency resources corresponding to receiving the downlink reference signal, the one index may correspond to a column or a row in the matrix.

For example, assume that the matrix isThe first row of the matrix corresponds to IRS1, the second row corresponds to the base station, and the third row corresponds to IRS2. The weights of IRS1 and IRS2 can be indicated by the first weight information, respectively +.>And->Assume that the index indication information indicates that the index is "0", which corresponds to the first column of the matrix, and the index is associated with the first time-frequency resource t ₁ Corresponding to the second column of the corresponding matrix with the index of '1', and the index is matched with the second time-frequency resource t ₂ Corresponding to the above. Then it can be considered that at time-frequency resource t ₁ The weight of the downlink reference signal transmitted by IRS1 is +.>The phase is positive. Similarly, IRS2 is in time-frequency resource t ₁ The weight of the uplink and downlink reference signals is +.>The phase is negative. Similarly, at time-frequency resource t ₂ The weight of IRS1 is +.>The phase is negative and the weight of IRS2 is +.>The phase is positive.

In this way, if the terminal device subtracts the downlink reference signal on the first time-frequency resource from the downlink reference signal on the second time-frequency resource, it can eliminate the interference of the reflected signal from IRS1 and the signal from the base station, and only the signal received from IRS2 is retained.

In one possible implementation, the terminal device may also receive K first power threshold information from the base station. The first power threshold information may indicate a first power threshold. Wherein K first power thresholds are associated with K IRSs. And under the condition that the power of the obtained signal is smaller than the associated first power threshold value after the terminal equipment subtracts any two signals, the terminal equipment can consider that the associated IRS has no optimal weight for the terminal equipment. For example, the terminal device will And if the obtained signal power is smaller than a first power threshold value associated with the IRS1, the IRS1 can be considered to have no optimal weight for the terminal equipment.

That is, the first power threshold of the 1 st IRS is denoted as ρ ₁ . For reflected signals from IRS1

When ρ is satisfied _k ≥‖ΔY _k ‖ ₂ The IRS1 is considered to have no optimal weight for the terminal device.

Optionally, in the second information sent by the terminal device to the base station, the weight information of the IRS1 may be indicated as a predetermined value, for example, -1, which is not specifically limited in the present application.

Based on the concept of the above embodiments, referring to fig. 4, an embodiment of the present application provides a communication apparatus 400, the apparatus 400 including a processing unit 401 and a transceiving unit 402. The apparatus 400 may be a communication apparatus or an apparatus that is applied to a communication apparatus and is capable of supporting the communication apparatus to perform a signal processing method.

The transceiver unit may also be referred to as a transceiver module, a transceiver device, etc. The processing unit may also be called a processor, a processing board, a processing unit, a processing device, etc. Alternatively, the device for implementing the receiving function in the transceiver unit may be regarded as a receiving unit, and it should be understood that the transceiver unit is configured to perform the sending operation and the receiving operation of the communication apparatus in the foregoing method embodiment, and the device for implementing the sending function in the transceiver unit is regarded as a sending unit, that is, the transceiver unit includes the receiving unit and the sending unit.

In addition, it should be noted that if the device is implemented by a chip/chip circuit, the transceiver unit may be an input/output circuit and/or a communication interface, and perform an input operation (corresponding to the foregoing receiving operation) and an output operation (corresponding to the foregoing transmitting operation); the processing unit is an integrated processor or microprocessor or integrated circuit.

An embodiment of applying the apparatus 400 to a terminal device and a first network device is described in detail below.

The operations performed by the units of the apparatus 400 when applied to a terminal device will be described in detail, for example.

In an alternative embodiment, the communication apparatus 600 may be applied to a terminal device, and perform a method performed by the terminal device, for example, a method performed by the terminal device in the embodiment shown in fig. 3. A transceiving unit 402 for receiving first information from a first network device, the first information comprising matrix indication information and first weight information of each of the K second network devices, K is a positive integer, wherein matrix indication information indicates a matrix of (K+1) x O or O x (K+1), and the matrix rank is K+1,O and is more than or equal to K+1. The transceiver unit 402 is further configured to receive a plurality of downlink reference signals, where the number of the plurality of downlink reference signals is greater than or equal to O. When the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each row of (k+1) elements includes K elements corresponding to K second network devices one by one. Or when the matrix indication information indicates a matrix of (K+1) ×O, one column of the matrix of (K+1) ×O corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each column of (K+1) elements contains K elements which are in one-to-one correspondence with K second network devices. The processing unit 401 is configured to determine the second information according to the plurality of downlink reference signals, the first weight information, and the matrix. The transceiver unit 402 is further configured to send the second information to the first network device.

The operations performed by the units of the apparatus 400 when applied to the first network device will be described in detail, for example.

In an alternative embodiment, the communication apparatus 600 may be applied to the first network device, and perform the method performed by the first network device, for example, the method performed by the first network device in the embodiment shown in fig. 3. The processing unit 401 is configured to generate first information. A transceiver unit 402, configured to send the first information to a terminal device. The first information comprises matrix indication information and first weight information of each of K second network devices, wherein K is a positive integer. The matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O not less than K+1. The transceiver unit 402 is further configured to send a plurality of downlink reference signals to the terminal device, where the number of the plurality of downlink reference signals is greater than or equal to O. When the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each row of (k+1) elements includes K elements corresponding to K second network devices one by one. Or when the matrix indication information indicates a matrix of (K+1) ×O, one column of the matrix of (K+1) ×O corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each column of (K+1) elements contains K elements which are in one-to-one correspondence with K second network devices. The transceiver unit 402 is further configured to receive second information from the terminal device, where the second information is determined according to the plurality of downlink reference signals, the first weight information, and the matrix.

Based on the concept of the embodiment, as shown in fig. 5, an embodiment of the present application provides a communication apparatus 500. The communication device 500 includes a processor 510. Optionally, the communication device 500 may further comprise a memory 520 for storing instructions to be executed by the processor 510 or for storing input data required by the processor 510 to execute instructions or for storing data generated after the processor 510 executes instructions. Processor 510 may implement the methods shown in the method embodiments described above through instructions stored in memory 520.

Based on the concept of the embodiment, as shown in fig. 6, an embodiment of the present application provides a communication apparatus 600, and the communication apparatus 600 may be a chip or a chip system. Alternatively, the chip system in the embodiment of the present application may be formed by a chip, and may also include a chip and other discrete devices.

The communication device 600 may include at least one processor 610, the processor 610 being coupled to a memory, which may optionally be located within the device or external to the device. For example, the communication device 600 may also include at least one memory 620. Memory 620 holds computer programs, configuration information, computer programs or instructions and/or data necessary to implement any of the embodiments described above; the processor 610 may execute a computer program stored in the memory 620 to perform the method of any of the embodiments described above. In the alternative, the memory may be integral to the processor.

The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. The processor 610 may operate in conjunction with the memory 620. The specific connection medium between the transceiver 630, the processor 610, and the memory 620 is not limited in the embodiment of the present application.

A transceiver 630 may also be included in the communication apparatus 600, and the communication apparatus 600 may interact with other devices via the transceiver 630. The transceiver 630 may be a circuit, a bus, a transceiver, or any other device that may be used for information interaction, or referred to as a signal transceiver unit. As shown in fig. 6, the transceiver 630 includes a transmitter 631, a receiver 632, and an antenna 633. In addition, when the communication device 600 is a chip-type device or circuit, the transceiver in the communication device 600 may be an input/output circuit and/or a communication interface, and may input data (or receive data) and output data (or transmit data), and the processor may be an integrated processor or a microprocessor or an integrated circuit, and the processor may determine the output data according to the input data.

In one possible implementation manner, the communication apparatus 600 may be applied to a communication apparatus, and in particular, the communication apparatus 600 may be a communication apparatus, or may be an apparatus capable of supporting a communication apparatus to implement a function of a terminal device or a first network device in any of the above-mentioned embodiments. The memory 620 holds the necessary computer programs, computer programs or instructions and/or data to implement the functions of the terminal device or the first network device in any of the embodiments described above. The processor 610 may execute a computer program stored in the memory 620 to perform the method performed by the terminal device or the first network device in any of the above embodiments.

Since the communication apparatus 600 provided in this embodiment is applicable to a terminal device or a first network device, the method performed by the terminal device or the first network device is completed. Therefore, reference may be made to the above method embodiments for the technical effects, which are not described herein.

In an embodiment of the present application, the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a hard disk (HDD) or a Solid State Drive (SSD), or may be a volatile memory (RAM). The memory may also be any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in embodiments of the present application may also be circuitry or any other device capable of implementing a memory function for storing a computer program, a computer program or instructions and/or data.

Based on the above embodiments, referring to fig. 7, another communication apparatus 700 is provided according to an embodiment of the present application, including: an input-output interface 710 and a logic circuit 720; an input/output interface 710 for receiving the code instruction and transmitting to the logic circuit 720; logic 720 for executing code instructions to perform the method performed by the terminal device or the first network device in any of the embodiments described above.

Hereinafter, operations performed by the apparatus 700 applied to the terminal device or the first network device will be described in detail.

An optional oneIn an embodiment, the communication apparatus 700 may be applied to a terminal device, and perform a method performed by the terminal device, for example, a method performed by the terminal device in the embodiment shown in fig. 3. The input/output interface 710 is configured to input first information from the first network device, where the first information includes matrix indication information and first weight information of each of K second network devices, and K is a positive integer. The matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O not less than K+1. The input/output interface 710 is further configured to input a plurality of downlink reference signals. Wherein each row of the matrix corresponds to one of a plurality of downlink reference signals, and the elements X in each column _k,1 And element X _k,2 Corresponding to K second network devices, or each column of the matrix corresponds to one of a plurality of downlink reference signals, element X in each row _k,1 And element X _k,2 Corresponding to K second network devices. Logic 720 determines the second information based on the plurality of downlink reference signals, the first weight information, and the matrix. The input/output interface 710 is further configured to output the second information to the first network device.

In an alternative embodiment, the communication apparatus 700 may be applied to the first network device, and perform the method performed by the first network device, for example, the method performed by the first network device in the embodiment shown in fig. 3. Logic 720 for generating the first information. And an input-output interface 710 for outputting the first information to the terminal device. The first information comprises matrix indication information and first weight information of each of K second network devices, wherein K is a positive integer. The matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O not less than K+1. The input/output interface 710 is further configured to output a plurality of downlink reference signals to the terminal device, where the number of the plurality of downlink reference signals is equal to or greater than O. When the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each row of (k+1) elements includes K elements corresponding to K second network devices one by one. Or when the matrix indication information indicates a matrix of (K+1) ×O, one column of the matrix of (K+1) ×O corresponds to one of the time-frequency resources corresponding to the plurality of downlink reference signals, and each column of (K+1) elements contains K elements which are in one-to-one correspondence with K second network devices. The input/output interface 710 is further configured to input second information from the terminal device, where the second information is determined according to the plurality of downlink reference signals, the first weight information, and the matrix.

Since the communication apparatus 700 provided in the present embodiment is applicable to a terminal device or a first network device, a method performed by the terminal device or the first network device is performed. Therefore, reference may be made to the above method embodiments for the technical effects, which are not described herein.

Based on the above embodiments, the embodiments of the present application further provide a communication system, which includes at least one terminal device and at least one first network device. The technical effects obtained can be referred to the above method embodiments, and will not be described herein.

Based on the above embodiments, the embodiments of the present application also provide a computer readable storage medium storing a computer program or instructions that, when executed, cause a communication apparatus to perform a method of any of the above embodiments to be implemented. The computer readable storage medium may include: various media capable of storing program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.

In order to implement the functions of the communication device of fig. 4 to fig. 7, the embodiment of the present application further provides a chip, which includes a processor, and is configured to support the communication device to implement the functions related to the terminal device or the first network device in the embodiment of the method. In one possible design, the chip is connected to a memory or the chip comprises a memory for holding computer programs or instructions and data necessary for the terminal device or the first network device.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer programs or instructions. These computer programs or instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer programs or instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer programs or instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the scope of the embodiments of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims and the equivalents thereof, the present application is also intended to include such modifications and variations.

Claims

1. A method of beam management, comprising:

receiving first information from first network equipment, wherein the first information comprises matrix indication information and first weight information of each of K second network equipment, and K is a positive integer; wherein the matrix indication information indicates a matrix of (K+1) O or O (K+1), and the rank of the matrix is K+1,O more than or equal to K+1;

receiving a plurality of downlink reference signals, wherein the number of the plurality of downlink reference signals is greater than or equal to O; when the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the downlink reference signals, K elements contained in each row of (k+1) elements corresponds to the K second network devices one by one, or when the matrix indication information indicates a (k+1) O matrix, one column of the (k+1) O matrix corresponds to one of the time-frequency resources corresponding to the downlink reference signals, and K elements contained in each column of (k+1) elements corresponds to the K second network devices one by one;

and sending second information to the first network device, wherein the second information is determined according to the downlink reference signals, the first weight information and the matrix.

2. The method of claim 1, wherein the matrix indication information comprises at least one of: the dimension of the matrix, the quantized values of the individual elements of the matrix;

at least one of the dimensions of the matrix and the quantized values of the individual elements of the matrix are used to determine the matrix.

3. The method according to any one of claims 1-2, further comprising:

and receiving third information from the first network equipment, wherein the third information is used for indicating the number of weight information corresponding to the second information, and the weight information comprises a weight index, an angle quantization value or an angle index.

4. A method according to any one of claims 1 to 3, wherein the first weight information includes array plane information of the corresponding second network device, and at least one of: the method comprises the steps of obtaining L base index information of corresponding second network equipment, L amplitude coefficients of the corresponding second network equipment and L phase coefficients of the corresponding second network equipment, wherein L is a positive integer; the L base index information, L amplitude coefficients, L phase coefficients are associated with the array plane information.

5. The method according to any one of claims 1 to 4, further comprising:

receiving K first power threshold information from the first network device; the second information is determined according to the K pieces of first power threshold information, the plurality of downlink reference signals, the first weight information and the matrix, and the K pieces of first power threshold information are used for determining whether the second information contains a preset value or not.

6. The method according to any one of claims 1 to 5, further comprising, prior to said sending the second information to the first network device:

receiving index indication information from the first network device, the index indication information indicating a plurality of indexes; wherein an index indicates a correspondence, and the correspondence is a correspondence between one of the time-frequency resources corresponding to the plurality of downlink reference signals and a row or a column of the matrix.

7. The method of any one of claims 1 to 6, wherein matrix indication information indicates a dimension K, the matrix satisfying the following S, or the S being subject to a elementary row or elementary column variation, wherein a is a non-zero integer:

8. A method of beam management, comprising:

transmitting first information to terminal equipment, wherein the first information comprises matrix indication information and first weight information of each second network equipment in K second network equipment, and K is a positive integer; wherein the matrix indication information indicates a matrix of (K+1) O or O (K+1), and the matrix rank is K+1,O and is more than or equal to K+1;

transmitting a plurality of downlink reference signals to the terminal equipment; when the matrix indication information indicates an O (k+1) matrix, one row of the O (k+1) matrix corresponds to one of the time-frequency resources corresponding to the downlink reference signals, K elements contained in each row of (k+1) elements corresponds to K second network devices one by one, or when the matrix indication information indicates a (k+1) O matrix, one column of the (k+1) O matrix corresponds to one of the time-frequency resources corresponding to the downlink reference signals, and K elements contained in each column of (k+1) elements corresponds to K second network devices one by one;

and receiving second information from the terminal equipment, wherein the second information is determined according to the downlink reference signals, the first weight information and the matrix.

9. The method of claim 8, wherein the indication information comprises at least one of: the dimension of the matrix, the quantized values of the individual elements of the matrix;

10. The method according to claim 8 or 9, further comprising:

and sending third information to the terminal equipment, wherein the third information is used for indicating the number of weight information corresponding to the second information, and the weight information comprises a weight index, an angle quantization value or an angle index.

11. The method according to any one of claims 8 to 10, wherein the first weight information includes array plane information of the corresponding second network device, and at least one of: the method comprises the steps of obtaining L base index information of corresponding second network equipment, L amplitude coefficients of the corresponding second network equipment and L phase coefficients of the corresponding second network equipment, wherein L is a positive integer; the L base index information, L amplitude coefficients, L phase coefficients are associated with the array plane information.

12. The method according to any one of claims 8 to 11, further comprising:

K pieces of first power threshold information are sent to the terminal equipment; the second information is determined according to the K pieces of first power threshold information, the plurality of downlink reference signals, the first weight information and the matrix, and the K pieces of first power threshold information are used for determining whether the second information contains a preset value or not.

13. The method according to any one of claims 8 to 12, further comprising, prior to receiving the second information:

transmitting index indication information to the terminal equipment, wherein the index indication information indicates a plurality of indexes; wherein an index indicates a correspondence, and the correspondence is a correspondence between one of the time-frequency resources corresponding to the plurality of downlink reference signals and a row or a column of the matrix.

14. The method according to any one of claims 8 to 13, further comprising:

transmitting first phase information and first resource indication information to a kth second network device, the first phaseThe bit information indicates M first phasesThe first resource indication information is used for indicating M time-frequency resources corresponding to the first phase information, and the M time-frequency resources and M first phases- >The corresponding relation of the M first phases +.>Are not all identical;

and taking K times 1 to K, wherein M is a positive integer.

15. The method of claim 14, wherein there are at least two first phases out of phase pi of the M first phases.

16. The method according to any one of claims 8 to 15, wherein matrix indication information indicates a dimension K, the matrix satisfying the following S, or the S being subject to a elementary row or elementary column variation, wherein a is a non-zero integer:

17. a communication device comprising means for performing the method of any of claims 1-7 or means for performing the method of any of claims 8-16.

18. A communication device, comprising: a processor and a memory;

the memory is used for storing a computer program or instructions;

the processor being configured to execute a computer program or instructions in a memory to cause the apparatus to perform the method of any one of claims 1 to 7 or to cause the apparatus to perform the method of any one of claims 8 to 16.

19. A computer readable storage medium storing computer executable instructions which, when invoked by an electronic device, cause the electronic device to perform the method of any one of claims 1 to 7 or cause the electronic device to perform the method of any one of claims 8 to 16.

20. A computer program product comprising computer-executable instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 16.

21. A chip system, the chip system comprising:

a communication interface;

a processor for invoking and executing the instructions via the communication interface to cause a device on which the chip system is mounted to perform the method of any of claims 1-7 or to cause a device on which the chip system is mounted to perform the method of any of claims 8-16.

22. A communication system comprising communication means for performing the method of any of claims 1-7, communication means for performing the method of any of claims 8-17, and K second network devices, K being a positive integer.