Intelligent reflector-assisted network uplink precoding transmission method and device

Abstract

The present application provides an intelligent reflector-assisted network uplink precoding transmission method and device, the method performs uplink channel detection of a cascaded beam link when the intelligent reflector device is turned on, the base station determines the optimal beam codebook of the intelligent reflector device and the optimal precoding matrix of the terminal device based on the uplink channel detection result, then the base station sends first information to the control device of the intelligent reflector device, so that the control device fixes the optimal beam codebook of the intelligent reflector device, and the base station sends second information to the terminal device, so that the terminal device configures the optimal precoding matrix based on the second information. The method of this embodiment provides a feasible solution for the uplink precoding matrix configuration of the terminal device and the precoding configuration of the intelligent reflector device.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for uplink precoding transmission in an intelligent reflector-assisted network. Background Art

[0002] 5G NR makes extensive use of spatial diversity, spatial division multiplexing and beamforming gain of multi-antenna technology to further improve the transmission efficiency of mobile communications. Compared with base stations, terminal devices have limited transmit power, so the precoding design for multi-antennas will determine their uplink communication capabilities. Therefore, the design of uplink multi-antenna precoding has always been the research focus of 5G networks.

[0003] Reconfigurable Intelligent Surface (RIS), also known as intelligent reflective surface, intelligent reflective surface device, etc., has beamforming capability and can realize amplitude and phase regulation of spatially incident electromagnetic waves. In this way, adding intelligent reflective surface devices to the traditional mobile communication network forms an intelligent reflective surface auxiliary network. Using intelligent reflective surface devices to assist the traditional mobile communication network in uplink transmission can improve the transmission efficiency of mobile communications.

[0004] However, due to the addition of intelligent reflective surface devices, the uplink precoding matrix configuration method of terminal devices in traditional mobile communication networks cannot be applied. Therefore, in the scenario where intelligent reflective surface devices assist mobile communications in uplink transmission, there is currently a lack of feasible solutions for how to implement the uplink precoding matrix configuration of terminal devices and the precoding configuration of intelligent reflective surface devices. Summary of the invention

[0005] The present application provides an uplink precoding transmission method and device for an intelligent reflecting surface assisted network, which realizes the uplink precoding matrix configuration of a terminal device and the precoding configuration of an intelligent reflecting surface device in the intelligent reflecting surface assisted network.

[0006] In a first aspect, the present application provides an uplink precoding transmission method for an intelligent reflector-assisted network, which is applied to an intelligent reflector-assisted network, wherein the intelligent reflector-assisted network includes: a terminal device, a base station, and at least one intelligent reflector device, wherein the at least one intelligent reflector device is used to enhance reflection of an uplink signal sent by the terminal device to the base station; and the at least one intelligent reflector device is connected to a control device; the method is applied to the base station, and the method includes:

[0007] When the at least one intelligent reflecting surface device is turned on, the base station receives multiple uplink reference signal resources sent by the terminal device on multiple cascaded beam links; the cascaded beam link is an uplink transmission link formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device, and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device, and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of the cascaded beam links;

[0008] The base station performs uplink channel detection according to the uplink reference signal resources respectively received on the multiple cascade beam links to obtain uplink channel quality estimation values ​​of the multiple cascade beam links, and the base station determines a first beam codebook and a target precoding matrix used by the terminal device when sending uplink data based on the uplink channel quality estimation values ​​of the multiple cascade beam links; the first beam codebook is a codebook used by the first intelligent reflection surface device when the terminal device performs reflection enhancement on the uplink reference signal resource during the uplink channel detection process; the first intelligent reflection surface device is an intelligent reflection surface device with the strongest reflection enhancement capability among the at least one intelligent reflection surface device;

[0009] The base station sends first information to the control device; the first information carries indication information of the first beam codebook, and the first information is used to instruct the control device to configure the first beam codebook as a codebook used by the at least one intelligent reflection surface device to perform reflection enhancement on uplink data sent by the terminal device;

[0010] The base station sends second information to the terminal device; the second information carries indication information of the target precoding matrix, and the second information instructs the terminal device to configure the target precoding matrix as a precoding matrix used for sending uplink data.

[0011] In a second aspect, the present application provides an intelligent reflector-assisted network uplink precoding transmission method, which is applied to an intelligent reflector-assisted network, wherein the intelligent reflector-assisted network includes: a terminal device, a base station, and at least one intelligent reflector device, wherein the at least one intelligent reflector device is used to enhance the reflection of an uplink signal sent by the terminal device to the base station; and the at least one intelligent reflector device is connected to a control device; the method is applied to the terminal device, and the method includes:

[0012] The terminal device sends multiple uplink reference signal resources on multiple cascaded beam links, and the cascaded beam links are uplink transmission links formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device, and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device, and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of the cascaded beam links; the multiple uplink reference signal resources are used for uplink channel detection of the multiple cascaded beam links; the uplink channel detection of the multiple cascaded beam links is used to determine the target precoding matrix of the terminal device;

[0013] The terminal device receives second information sent by the base station; the second information carries indication information of a target precoding matrix, and the second information indicates that the terminal device configures the target precoding matrix as a precoding matrix used for sending uplink data;

[0014] The terminal device configures the target precoding matrix according to the second information.

[0015] In a third aspect, the present application provides an intelligent reflector-assisted network uplink precoding transmission method, which is applied to an intelligent reflector-assisted network, wherein the intelligent reflector-assisted network includes: a terminal device, a base station, and at least one intelligent reflector device, wherein the at least one intelligent reflector device is used to enhance the reflection of an uplink signal sent by the terminal device to the base station; and the at least one intelligent reflector device is connected to a control device; the method is applied to the control device, and the method includes:

[0016] The control device controls the intelligent reflecting surface device to start, so that the at least one intelligent reflecting surface device performs reflection enhancement on the uplink reference signal resources sent by the terminal device on multiple cascaded beam links; the cascaded beam link is an uplink transmission link formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of the cascaded beam links; the multiple uplink reference signal resources are used for uplink channel detection of the multiple cascaded beam links; the uplink channel detection of the multiple cascaded beam links is used to determine the first beam codebook of the at least one intelligent reflecting surface device;

[0017] The control device receives first information sent by the base station, where the first information carries indication information of the first beam codebook, and the first information is used to instruct the control device to configure the first beam codebook as a codebook used by the at least one intelligent reflection surface device to perform reflection enhancement on uplink data sent by the terminal device;

[0018] In response to the first information, the control device configures the first beam codebook as a codebook used by the at least one intelligent reflecting surface device to perform reflection enhancement on uplink data sent by the terminal device.

[0019] In a fourth aspect, the present application provides a communication device, comprising: a module for implementing the method described in the first aspect, the second aspect or the third aspect.

[0020] In a fifth aspect, the present application provides a communication device, including: a memory and a processor;

[0021] The memory is configured to store computer program instructions;

[0022] The processor is configured to execute the computer program instructions so that the communication device implements the method of the first aspect, the second aspect or the third aspect.

[0023] In a sixth aspect, the present application provides a readable storage medium, comprising: computer program instructions; an electronic device runs the computer program instructions so that the electronic device implements the method described in the first aspect, the second aspect or the third aspect.

[0024] In the seventh aspect, the present application is a chip, characterized in that it includes: an interface circuit and a logic circuit, the interface circuit is used to receive signals from other chips outside the chip and transmit them to the logic circuit, or send signals from the logic circuit to other chips outside the chip, and the logic circuit is used to implement the method described in the first aspect, the second aspect or the third aspect.

[0025] In an eighth aspect, the present application provides a computer program product, and an electronic device runs the computer program product so that the electronic device implements the method described in the first aspect, the second aspect or the third aspect.

[0026] The method provided by the present application performs uplink channel detection of the cascade beam link when the intelligent reflection surface device is turned on. The base station determines the optimal beam codebook of the intelligent reflection surface device and the optimal precoding matrix of the terminal device based on the uplink channel detection result. Then, the base station sends first information to the control device of the intelligent reflection surface device, so that the control device fixes the optimal beam codebook of the intelligent reflection surface device, and the base station sends second information to the terminal device, so that the terminal device configures the optimal precoding matrix based on the second information. The method of this embodiment provides a feasible solution for the uplink precoding matrix configuration of the terminal device and the precoding configuration of the intelligent reflection surface device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of an intelligent reflective surface auxiliary network provided in an embodiment of the present application;

[0028] Figure 2 A flowchart of an uplink precoding transmission method for a smart reflector-assisted network provided in an embodiment of the present application;

[0029] Figure 3 This is a scene diagram of a dual intelligent reflective surface device participating in uplink transmission of a terminal device as exemplified in this application;

[0030] 4A to 4F A schematic diagram of the time-frequency position arrangement of uplink reference signal resources provided in an embodiment of the present application;

[0031] Figure 5 A flowchart of an uplink precoding transmission method for a smart reflector-assisted network provided in another embodiment of the present application;

[0032] Fig. 6A This is a schematic diagram of the time-frequency position arrangement of uplink dedicated reference signal resources exemplarily shown in this application;

[0033] Figure 6B This is a schematic diagram of code domain multiplexing of uplink dedicated reference signal resources exemplarily shown in the present application;

[0034] Figure 7 A flowchart of an uplink precoding transmission method for a smart reflector-assisted network provided in another embodiment of the present application;

[0035] Figure 8 A flowchart of an uplink precoding transmission method for a smart reflector-assisted network provided in another embodiment of the present application;

[0036] Fig. 9 A flowchart of an uplink precoding transmission method for a smart reflector-assisted network provided in another embodiment of the present application;

[0037] Fig.10A structural diagram of a communication device provided in one embodiment of the present application;

[0038] Fig.11 A structural diagram of a communication device provided in another embodiment of the present application;

[0039] Fig.12 A structural diagram of a communication device provided in another embodiment of the present application;

[0040] Fig.13 A structural diagram of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0041] In this application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c alone can represent: a, b, c, a and b, a and c, or a, b, and c, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0043] The terms "connected" and "connected" should be understood in a broad sense. For example, the "connected" or "connected" of a circuit structure can refer to not only physical connection, but also electrical connection or signal connection. For example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, or it can be the internal connection of two elements; signal connection can refer to signal connection through a circuit or through a media medium, such as radio waves. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Figure 1This is a schematic diagram of the structure of the intelligent reflective surface auxiliary network provided in one embodiment of the present application. Figure 1 As shown, the intelligent reflective surface assisted network 10 includes: terminal equipment 11, network side equipment 12 and intelligent reflective surface equipment 13.

[0045] The terminal device 11 may be referred to as a user terminal or user equipment (UE), and the embodiment of the present application does not limit the specific type of the terminal device 11. The terminal device 11 is used to send an uplink signal to the network side device 12 and receive a downlink signal sent by the network side device 12, so as to achieve communication with the network side device 12. Exemplarily, the terminal device 11 may be a wireless terminal, which may be a device that provides voice and / or other service data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal may communicate with one or more core networks via a radio access network (RAN), and the wireless terminal may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and / or data with a radio access network. For example, personal communication service (PCS) phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), drone, wearable device, terminal in Internet of Vehicles and other devices. Wireless terminal can also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, access terminal, user terminal, user agent, user device or user equipment, user equipment (UE), which is not limited here. In addition, the terminal device 11 can use mobile operating systems such as iOS, Android or Hongmeng, which is not limited in the embodiments of the present application.

[0046] The network side device 12 is used to send a downlink signal to the terminal device 11 and receive an uplink signal sent by the terminal device 11, so as to communicate with the terminal device. The network side device 12 can be a base station or a core network device. In the embodiment of the present application, the network side device 12 is taken as a base station in the NR system as an example, but the specific type of the base station is not limited.

[0047] The intelligent reflector device (RIS) 13 is a two-dimensional thin-layer artificial electromagnetic surface structure composed of a large number of passive reflective elements, each of which can independently induce the amplitude and phase changes of the incident signal, thereby collaboratively realizing fine-grained three-dimensional reflection beamforming, thereby providing reflection gain for the uplink channel and reflection gain for the downlink channel, and enabling the terminal device 11 and the network side device 12 to send signals with lower transmission power. Among them, the method provided in this application mainly provides a feasible solution for how to perform uplink power control in the scenario where the intelligent reflector device 11 participates in the uplink transmission of the terminal device.

[0048] It should be noted that one or more smart reflective surface devices 13 may be deployed in the smart reflective surface auxiliary network 10. Figure 1 In the example, a single intelligent reflective surface device 13 is used as an example. In addition, the intelligent reflective surface auxiliary network 10 may include multiple terminal devices 11, and the one or more intelligent reflective surface devices 13 can realize reflection enhancement of uplink signals sent by multiple terminal devices 11. Figure 1 A single terminal device 11 is taken as an example for illustration.

[0049] The smart reflective surface device 13 is connected to the control device 14, and the control device 14 is mainly used to manage the smart reflective surface device, for example, manage the beam codebook of the smart reflective surface device, manage the opening and closing of the smart reflective surface device, etc.

[0050] When the terminal device 11 adopts multi-antenna technology, the precoding technology for the multi-antenna determines the uplink communication capability. Precoding is the core functional module of the physical layer. The terminal device usually implements uplink precoding based on the precoding matrix (also called uplink precoding or uplink precoding matrix), thereby realizing a variety of uplink transmission modes. Therefore, it is necessary to pre-configure the uplink precoding matrix of the terminal device, but the traditional mobile communication network does not consider the addition of intelligent reflection surface equipment. Therefore, the existing uplink precoding matrix configuration method cannot be applied to the intelligent reflection surface auxiliary network. In addition, it is also necessary to consider how to configure the uplink precoding of the intelligent reflection surface equipment.

[0051] Based on this, the present application provides an uplink precoding transmission method and device for an intelligent reflecting surface assisted network, which performs uplink channel detection when an intelligent reflecting surface device participates in uplink transmission, and then determines the optimal beam codebook for uplink reflection enhancement of the intelligent reflecting surface device and the target precoding matrix for uplink data sent by the terminal device according to the result of the uplink channel detection, and then performs uplink precoding configuration of the terminal device and precoding configuration of the intelligent reflecting surface device, thereby realizing uplink precoding configuration under the intelligent reflecting surface assisted network.

[0052] Next, the smart reflector-assisted network uplink precoding transmission method provided by the present application is described in detail through some embodiments and drawings.

[0053] Figure 2 This is a flow chart of an intelligent reflector-assisted network uplink precoding transmission method provided in an embodiment of the present application. In this embodiment, the intelligent reflector device participating in the uplink transmission of the terminal device is turned on. Figure 2 As shown, the method of this embodiment includes:

[0054] S201: A terminal device sends multiple uplink reference signal resources on multiple cascaded beam links. Correspondingly, a base station receives multiple uplink reference signal resources via multiple cascaded beam links.

[0055] The base station needs to obtain uplink channel information, which is the basis for the base station to indicate a suitable precoding matrix to the terminal device. Based on this, the base station obtains the uplink channel information through S201 and S202.

[0056] Among them, the cascaded beam link is an uplink transmission link formed by cascading a beam supported by a terminal device, a beam supported by at least one intelligent reflecting surface device, and a beam of a base station; the number of cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by at least one intelligent reflecting surface device, and the number of beams supported by the base station.

[0057] The terminal device sends one uplink reference signal resource on one cascade beam link. Thus, the number of uplink reference signal resources is related to the number of cascade beam links.

[0058] S202: The base station performs uplink channel detection according to uplink reference signal resources respectively received on multiple cascade beam links to obtain uplink channel quality estimation values ​​of the multiple cascade beam links.

[0059] The base station can obtain intermediate information such as the noise level and channel characteristics of the cascaded beam link based on the received power of the uplink reference signal resource and the transmitted power of the uplink reference signal resource specified by the base station, and then calculate the uplink channel quality estimation value of the cascaded beam link based on the obtained intermediate information. The present application does not limit the method for calculating the uplink channel quality estimation value using the intermediate information, and any existing method can be used for implementation.

[0060] S203: The base station determines a first beam codebook and a target precoding matrix used by the terminal device to send uplink data based on uplink channel quality estimation values ​​of multiple cascaded beam links.

[0061] The first beam codebook is a codebook used by the first intelligent reflection surface device to enhance the reflection of the uplink reference signal resource of the terminal device during the uplink channel detection process; the first intelligent reflection surface device is an intelligent reflection surface device with the strongest reflection enhancement capability among at least one intelligent reflection surface device. In this way, the first beam codebook is the best beam codebook of RIS, and the reflection enhancement effect of the intelligent reflection surface device using the first beam codebook is the best.

[0062] The target precoding matrix is ​​the precoding matrix used for uplink transmission of the terminal device, and the DM-RS of the PUSCH and the uplink data of the PUSCH use the same precoding, that is, both the DM-RS and the uplink data use the target precoding matrix.

[0063] S204: The base station sends first information to a control device of the intelligent reflector device, where the first information carries indication information of a first beam codebook. Correspondingly, the control device receives the first information.

[0064] S205: The control device configures the first beam codebook as a codebook used when performing reflection enhancement on uplink data sent by the terminal device according to the first information. That is, the control device fixes the smart reflective surface device codebook.

[0065] S206, the base station sends second information to the terminal device, wherein the second information carries indication information of the target precoding matrix. Accordingly, the terminal device receives the second information sent by the base station.

[0066] The second information carries instructions for the terminal device to configure a precoding matrix, and the second information carries indication information of a target precoding matrix, clearly indicating which precoding matrix the terminal device is to configure.

[0067] In some embodiments, the base station performs uplink channel detection based on the uplink reference signal sent by the terminal device, performs resource scheduling for the terminal device, and determines the uplink reference signal resources corresponding to the uplink transmission, the number of layers of the uplink transmission and the precoding matrix; further determines the MCS level of the uplink transmission based on the precoding matrix and the channel information; then, the base station sends uplink scheduling permission information to the terminal device through the cascaded beam link, and the uplink scheduling permission information carries TPMI, and TPMI is used to indicate the target precoding matrix, that is, TPMI is equivalent to the second information; the uplink scheduling permission information also carries: information such as the number of transmission layers, MCS, and DM-RS port indication, which are used for uplink data transmission by the terminal device.

[0068] S207: The terminal device responds to the second information and configures the target precoding matrix as the precoding matrix used for sending uplink data.

[0069] Through the method of this embodiment, uplink precoding configuration of the terminal device and the smart reflecting surface device in the smart reflecting surface attachment network is implemented.

[0070] Combination Figure 2 In S201 and S202, during uplink channel detection, since the terminal device is designed with multiple antennas and is equipped with multiple antenna units, and the multiple antenna units correspond to the antenna ports of each multi-port SRS, the terminal device has multiple beams available for uplink. The terminal device sends different uplink reference signal resources to the base station in multiple different beam directions in the analog domain. However, the smart reflector device, as an intermediate node in the cascade beam link, has the ability to reconstruct the emission direction of the electromagnetic beam. Therefore, unlike the traditional mobile communication system (such as the NR system) architecture, the number of uplink cascade beam links in the smart reflector-assisted network has increased significantly, and the time-frequency position and resource quantity of the uplink reference signal resources sent by the terminal device need to be adapted and designed.

[0071] Optionally, in Figure 2 Based on the embodiment shown, after S207, the method further includes:

[0072] S208. The terminal device sends uplink data to the base station through the intelligent reflective surface device.

[0073] Among them, the terminal device sends uplink data to the base station through PUSCH, and the PUSCH of this application adopts the design of pre-DM-RS, so that the channel estimated by the base station from DM-RS is directly used for uplink data demodulation, thereby improving data demodulation efficiency.

[0074] The DM-RS of the PUSCH and the data of the PUSCH use the same precoding matrix.

[0075] Correspondingly, the base station receives uplink data.

[0076] Specifically, the base station determines the target receiving direction according to the first beam codebook and the target precoding matrix; receives the uplink data sent by the terminal device in the target receiving direction; then, the base station demodulates and decodes the uplink data using the pre-DM-RS on the PUSCH to obtain the uplink data.

[0077] It should be noted that, during the transmission of uplink data, the intelligent reflecting surface device performs reflection enhancement on the uplink data according to the first beam codebook.

[0078] Assuming the number of beams supported by the terminal device is M, the fixed uplink beam directions and amplitude-phase matrix mapping numbers of R (R ≥ 1) intelligent reflector devices are {N1, N2, … N R}, the number of base station receiving beams is K, and when R intelligent reflector devices can all be used as reflectors in the “terminal device-RIS-base station”, consider the case where the intelligent reflector device performs single-hop reflection, and different intelligent reflector devices reflect independently, then, cascaded beam links, so that the terminal devices can pass through the Cascaded beam link transmission different uplink reference signal resources.

[0079] If one of the R intelligent reflector devices is considered as the intelligent reflector device in the “terminal device-RIS-base station”, there are M×N M ×K cascaded beam links. Among them, N M Indicates the number of amplitude-phase matrix mappings of the selected smart reflector device. The number of amplitude-phase matrix mappings is equal to the number of beams supported by the smart reflector device. The beams supported by the smart reflector device can also be understood as the reflector surface supported by the smart reflector device, and both have the same meaning in this article.

[0080] Exemplarily, the uplink reference signal resource is an SRS resource, R smart reflector devices participate in uplink transmission, and the number of beam codebooks of the R smart reflector devices is the same, which is N. M For example, when the cascade beam link of "terminal device-RIS-base station" only considers the transmission of the terminal device through the cascade beam link of a specific beam, the uplink signal is reflected by only one hop of RIS and does not pass through other RIS:

[0081] Specifically, the terminal device sends SRS#1#1 through beam 1, and multiple intelligent reflector devices in the intelligent reflector auxiliary network respectively maintain beam codebook 1 to transparently transmit SRS, and the intelligent reflector device forwards SRS#1#1; the base station performs channel detection on SRS#1#1 transmitted by different intelligent reflector devices with beam 1, beam 2...beam K.

[0082] For ease of understanding, the present application numbers the SRSs transmitted by different smart reflective surface devices. For example, assuming that R smart reflective surface devices respectively maintain beam codebook 1 for transmission, the SRSs transmitted by different smart reflective surface devices are numbered as follows: SRS#1#1_1, SRS#1#1_2, ..., SRS#1#1_R. The last number represents the identifier of the smart reflective surface device.

[0083] Afterwards, the terminal device still sends SRS#1#2, SRS#1#3, ... SRS#1#N in beam 1 in chronological order. M , corresponding to the beam codebooks 2, 3, ... N of the smart reflector device M , the intelligent reflector device uses beam codebook 2, 3...N M For transparent transmission, for a smart reflector device, the SRS forwarded by the smart reflector device is exemplary numbered as: SRS#1#2_RIS, SRS#1#3_RIS...SRS#1#N M _RIS; The base station performs channel detection in all base station beam directions for the above resources in a time sequence.

[0084] Finally, the terminal device changes the beam to 2, 3...M, adjusts the beam codebook of the smart reflector device according to the above two-step timing, and sends the uplink reference signal resources: {(SRS#2#1_1...SRS#2#1_R), (SRS#2#2...SRS#2#2_R)...(SRS#2#N M _1…SRS#2#N M _R)}, {(SRS#3#1_1…SRS#3#1_R), (SRS#3#2_1…SRS#3#2_R)…{SRS#3#N M _1…SRS#3#N M _R)}……{(SRS#M#1_1…SRS#M#1_R), (SRS#M#2_1…SRS#M#2_R)……{SRS#M#N M _1…SRS#M#N M _R)}; The base station performs channel detection on the above-mentioned SRS resources according to the receiving beam timing to obtain the channel detection results of all cascade beam links forwarded from R different intelligent reflector devices, and obtains the uplink channel quality of each cascade beam link, providing a basis for determining the first beam codebook and the target precoding matrix.

[0085] Based on this embodiment, in the present application, the number of SRS resources required for channel detection can be determined by (1) the number of predefined beams of the user terminal device (2) the total number of RIS beam codebooks (3) the number of beams received by the base station, so as to finally determine the total number of SRS resources. In addition, in order to facilitate the distinction between the SRS forwarded by the intelligent reflector device and the SRS received by the base station, the beam identifier of the base station can also be added when numbering.

[0086] For example, Figure 3 The scenario diagram of dual intelligent reflector devices participating in the uplink transmission of the terminal device is shown as an example in this application. The terminal device supports 2 beams (beam 1 and beam 2), the intelligent reflector device 1 supports 2 beams, the intelligent reflector device 2 supports 3 beams, the base station supports 4 beams, and the intelligent reflector device 1 and the intelligent reflector device 2 transparently transmit the SRS resources sent by the terminal device in parallel. In this way, Figure 3 In the scenario shown, there are 40 cascaded beam links. When detecting the uplink channel, the SRS resources sent by the terminal device are bound to the cascaded beam links, which facilitates the base station to detect the SRS resources and then determine the first beam codebook and the target precoding matrix.

[0087] by Figure 3 For example, Table 1 exemplarily shows the SRS resource sending timing of the terminal device in beam 1:

[0088] Table 1

[0089]

[0090]

[0091] The SRS resources are sent sequentially according to the timing shown in Table 1. The base station receives the SRS resources on 4 different beams and performs channel detection, and establishes an uplink channel quality estimation parameter set 1 corresponding to SRS#1. The uplink channel quality estimation parameter set 1 contains 4*5=20 uplink channel quality estimation values.

[0092] Afterwards, the terminal device adjusts the beam direction and performs the above operation again according to the beam of the intelligent reflection surface device and the base station to establish an uplink channel quality estimation parameter set 2 corresponding to SRS#2. The uplink channel quality estimation parameter set 2 contains 4*5=20 uplink channel quality estimation values.

[0093] Based on this, the base station determines the first beam codebook and the target precoding matrix based on uplink channel quality estimation parameter set 1 and uplink channel quality estimation parameter set 2.

[0094] Due to the addition of intelligent reflector devices, the number of cascaded beam links is large, and the traditional protocol definition for uplink reference signal resource configuration design is not applicable. For example, the number of beams supported by the terminal device is M, and the number of receiving beams supported by the base station is K. In the absence of intelligent reflector devices, the required uplink reference signal resources are M*K. R intelligent reflector devices are introduced, and the number of reflection codebooks of R (R≥1) reflectors are N1, N2, ... N respectively. R , considering the single-hop reflection of the smart reflector, the number of cascaded beam links is: The uplink reference signal resources required are By comparison, it can be seen that the number of uplink reference signal resources required when the intelligent reflector device is introduced is much larger than the number of uplink reference signal resources required when the intelligent reflector device is not introduced. As the number of intelligent reflector devices increases and the number of beam codebooks supported by the intelligent reflector devices increases, the number of cascaded beam links increases significantly, and the number of uplink reference signal resources required will also increase significantly. Therefore, for the intelligent reflector-assisted network, it is necessary to expand the uplink reference signal resources to meet the correspondence between the uplink reference signal resources and the number of cascaded beam links.

[0095] Next, how to expand the uplink reference signal resources is introduced in detail.

[0096] The present application mainly expands the uplink reference signal resources by directly expanding the uplink reference signal resource numbering, adding a period identification field to the uplink reference signal resources, and the like.

[0097] Expansion method 1: Directly expand the uplink reference signal resource number

[0098] Directly expand the existing uplink reference signal resource numbering. The number of uplink reference signal resource numbers is related to the number of smart reflector devices participating in uplink transmission and the number of beam codebooks supported by the smart reflector devices, so that the number of uplink reference signal resources meets the number requirement of joint beams. This expansion method is suitable for the case where the number of cascaded beam links is small.

[0099] The uplink reference signal resource numbering is expanded by expanding the time-frequency domain position arrangement of the uplink reference signal resources, and using time-frequency multiplexing and uplink reference signal resource sequence shifting to achieve codebook multiplexing gain to further increase the support capability for sending a large number of different uplink reference signal resources.

[0100] The existing mobile communication system configures each uplink reference signal resource separately, and in the time domain, the uplink reference signal resource is configured on 1, 2 or 4 consecutive symbols in the last 6 OFDM symbols of the OFDM symbol, while in the frequency domain, the uplink reference signal resource has two subcarrier mapping modes, Comb-2 and Comb-4, which occupy 6 and 3 subcarriers in one PRB respectively.

[0101] Based on this, this application expands the uplink reference signal resources in the current time domain and frequency domain. The specific solution is as follows:

[0102] 1. Time domain symbol expansion of uplink reference signal resources

[0103] One way is to expand the configurable position of the uplink reference signal resource in the OFDM symbol. In the present application, the maximum length of the uplink reference signal resource in the time domain is extended to 14 OFDM symbols, that is, the length of an uplink reference signal resource in the time domain can be {1, 2, 4, 6, 8, 10, 12, 14}. Therefore, the configurable position of a single uplink reference signal resource in a time slot is 1, 2, 4, 6, 8, 10, 12 or 14 consecutive OFDM symbols.

[0104] In this way, multiple uplink reference signals sent by the terminal device are sent through the PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and each uplink reference signal resource occupies N consecutive OFDM symbols in the time slot to which it belongs, where N = 1, 2, 4, 6, 8, 10, 12, 14.

[0105] For example, Figure 4A An example of a time-frequency position arrangement of the uplink reference signal resources is shown. Taking the uplink reference signal resources as SRS resources as an example, SRS1 occupies 4 consecutive OFDM symbols in a time slot, SRS2 occupies 12 consecutive OFDM symbols in a time slot, SRS3 occupies 8 consecutive OFDM symbols in a time slot, SRS4 occupies 2 consecutive OFDM symbols in a time slot, SRS5 occupies 2 consecutive OFDM symbols in a time slot, and SRS6 occupies 6 consecutive OFDM symbols in a time slot.

[0106] Another way is: after the configurable OFDM symbols of the uplink reference signal resources in a single time slot are expanded to a maximum of 14 OFDM symbols, the present application further adopts the intra-time slot multiplexing method to further expand the utilization efficiency of the uplink reference signal resources in the time domain. Therefore, this solution considers that multiple uplink reference signal resources with the same frequency domain resources but different time domain resources can be sent in the last 14 OFDM symbols.

[0107] In this way, multiple uplink reference signals sent by the terminal device are sent through the PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and each uplink reference signal resource occupies N consecutive OFDM symbols in the time slot to which it belongs, where N = 1, 2, 4, 6, 8, 10, 12, 14.

[0108] For example, Figure 4A As shown in the time-frequency arrangement of the uplink reference signal resources, SRS resource 1, SRS resource 4, SRS resource 5, and SRS resource 6 use the same frequency domain resources in the same time slot, and adopt time division multiplexing OFDM symbols (i.e. occupying different time domain resources on the same frequency domain resources) for uplink channel measurement of different cascaded beam links.

[0109] 2. Frequency domain expansion of uplink reference signal resources

[0110] In traditional mobile communication systems, the same uplink reference signal resource has two subcarrier mapping modes in the frequency domain: Comb-2 and Comb-4, and occupies 6 subcarriers and 3 subcarriers in one PRB respectively. In this application, it will not be limited to multiplexing uplink reference signal resources sent by multiple terminal devices in the frequency domain, but will also realize the multiplexing of different uplink reference signal resources of the same terminal device in the frequency domain.

[0111] In this way, the terminal device sends multiple uplink reference signal resources for uplink channel detection through the PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and at least one uplink reference signal resource is mapped to the subcarrier of the PRB through Comb-2 and Comb-4 methods.

[0112] For example, Figure 4A As shown in the time-frequency arrangement of the uplink reference signal resources, uplink reference signal resource 1 and uplink reference signal resource 3 are different uplink reference signal resources sent by the same terminal device.

[0113] 3. Uplink reference signal resources are expanded by combining time domain and frequency domain

[0114] That is, the extension scheme of the uplink reference signal resources in the time domain and the extension scheme of the uplink reference signal resources in the frequency domain are multiplexed to greatly increase the transmission capacity of the uplink reference signal resources on a single time slot and a single PRB.

[0115] Among them, the time-frequency domain multiplexing expansion scheme is suitable for situations where there are a large number of cascaded beam links.

[0116] In this way, multiple uplink reference signals sent by the terminal device are sent through the PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and each uplink reference signal resource occupies N consecutive OFDM symbols in the corresponding time slot, where N = 1, 2, 4, 6, 8, 10, 12, 14. And there is a same subcarrier in the PRB carrying two or more identical uplink reference signal resources with different resource identifiers. The PRB of each time slot contains multiple uplink reference signal resources, and multiple uplink reference signal resources are mapped to the subcarriers of the PRB in Comb-2 or Comb-4 mode.

[0117] Taking M=1, R=2, N1=2, N2=3, K=2 as an example, a total of 1×(2+3)×2=10 different uplink reference signal resources are required. Assume that under the above time domain and frequency domain resource expansion and multiplexing scheme, a single time slot can send 10 different uplink reference signal resources. Figure 4B An example of one of the multiple resource position arrangement methods is shown, taking the uplink reference signal resource as an example of the SRS resource, SRS resources 1 to 10 are carried on the PRB of a time slot, SRS resource 1 occupies OFDM symbols 2 to 5, SRS resource 2 occupies OFDM symbols 6 to 9, SRS resource 3 occupies OFDM symbols 10 to 13, and SRS resources 1 to 3 are mapped to subcarrier 0, subcarrier 4 and subcarrier 8 of the PRB using the Comb_4 method. It can be understood that SRS resources 1 to 3 use the same frequency domain resources, but different time domain resources; SRS resource 4 occupies OFDM symbols 4 and 5, SRS resource 5 occupies OFDM symbols 6 to 9, SRS resource 6 Occupying OFDM symbols 10 and 13, and SRS resources 4 to 6 are mapped to subcarriers 2, 6, and 10 of the PRB using the Comb_4 method. It can be understood that SRS resource sources 4 to 6 use the same frequency domain resources, but use different time domain resources; SRS resource 7 occupies OFDM symbol 6, SRS resource 8 occupies OFDM symbols 7 and 8, SRS resource 9 occupies OFDM symbols 9 to 12, SRS resource 10 occupies OFDM symbol 13, and SRS resources 7 to 10 are mapped to subcarriers 1, 3, 5, 7, and 9 of the PRB using the Comb_2 method. It can be understood that SRS resources 7 to 10 use the same frequency domain resources, but use different time domain resources.

[0118] In this way, the number of uplink reference signal resources that can be sent in a single time slot is greatly increased.

[0119] Among them, different uplink reference signal resources are arranged according to the time-frequency domain multiplexing expansion scheme. Since a large number of uplink signal reference resources need to be sent, multiple time slots may be required for sending. Therefore, a corresponding identification field is required to identify the total number of time slots required, so as to determine the sending time slot to which each uplink reference signal resource belongs.

[0120] Extension method 2: adding a period identification field to the uplink reference signal resource

[0121] When utilizing the traditional mobile communication system to configure the uplink reference signal resources in the intelligent reflector assisted network, it may happen that the number of uplink reference signal resources in a single time slot is difficult to meet the cascaded beam link transmission requirements of the intelligent reflector assisted network. Therefore, the present application solves this problem by periodically sending uplink reference signal resources in multiple time slots.

[0122] Specifically, all uplink reference signal resources to be sent form an uplink reference signal resource set, and a specific resource sending scheme is determined according to the sending capability of the uplink reference signal resources in a single uplink time slot of the terminal device.

[0123] This solution does not need to expand the transmittable position of the OFDM symbol in a single time slot for the uplink reference signal resource, and can be sent in the manner specified in the existing protocol. For example, in a smart reflector-assisted network, when the terminal device and the base station perform 5G communication, the terminal device uses the configuration of the last 6 OFDM symbols in NR to send the uplink reference signal resource.

[0124] In a specific example, taking M=2, R=2, N1=2, N2=3, K=2 as an example, a total of 2×(2+3)×2=20 different uplink reference signal resources are required. The uplink reference signal resources to be sent are numbered 1 to 20, and considering that the maximum number of uplink reference signal resources that can be sent in a single time slot of the terminal device is 5, a total of 4 cycles (i.e., 4 time slots) are required to send these 20 uplink reference signal resources. FIG. 4C to FIG. 4F The description is given by taking the uplink reference signal resource as an SRS resource as an example.

[0125] For example, one way to arrange the time-frequency position of SRS resources in period 1 may be as follows: Figure 4CAs shown: SRS resource 1 occupies OFDM symbols 8 to 11, and is mapped to subcarriers 1, 3, 5, 7, and 9 using the Comb_2 method; SRS resource 2 occupies OFDM symbol 11, and is mapped to subcarriers 0, 4, and 8 using the Comb_4 method; SRS resource 3 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 0, 4, and 8 using the Comb_4 method; SRS resource 4 occupies OFDM symbols 10 and 11, and is mapped to subcarriers 2, 6, and 10 using the Comb_2 method; SRS resource 5 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 2, 6, and 10 using the Comb_4 method.

[0126] For example, one way to arrange the time-frequency position of SRS resources in period 2 may be as follows: Figure 4E As shown: SRS resource 6 occupies OFDM symbols 10 to 13, and is mapped to subcarriers 1, 3, 5, 7, and 9 using the Comb_2 method; SRS resource 7 occupies OFDM symbol 11, and is mapped to subcarriers 0, 4, and 8 using the Comb_4 method; SRS resource 8 occupies OFDM symbols 9 and 10, and is mapped to subcarriers 0, 4, and 8 using the Comb_4 method; SRS resource 9 occupies OFDM symbols 10 and 11, and is mapped to subcarriers 2, 6, and 10 using the Comb_2 method; SRS resource 10 occupies OFDM symbols 8 and 9, and is mapped to subcarriers 2, 6, and 10 using the Comb_4 method.

[0127] For example, one way to arrange the time-frequency position of SRS resources in period 3 may be as follows: Figure 4F As shown: SRS resource 11 occupies OFDM symbols 10 and 11, and is mapped to subcarriers 1, 3, 5, 7, 9, and 11 using the Comb_2 method; SRS resource 12 occupies OFDM symbol 9, and is mapped to subcarriers 0, 4, and 8 using the Comb_4 method; SRS resource 13 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 2, 6, and 10 using the Comb_4 method; SRS resource 14 occupies OFDM symbols 10 to 13, and is mapped to subcarriers 2, 6, and 10 using the Comb_4 method; SRS resource 15 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 1, 3, 5, 7, 9, and 11 using the Comb_4 method.

[0128] For example, one way to arrange the time-frequency position of SRS resources in period 4 may be as follows: Figure 4FAs shown: SRS resource 16 occupies OFDM symbols 10 and 11, and is mapped to subcarriers 1, 3, 5, 7, and 9 using the Comb_2 method; SRS resource 17 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 0, 4, and 8 using the Comb_4 method; SRS resource 18 occupies OFDM symbol 11, and is mapped to subcarriers 0, 4, and 8 using the Comb_4 method; SRS resource 19 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 2, 6, and 10 using the Comb_2 method; SRS resource 20 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 1, 3, 5, 7, 9, and 11 using the Comb_2 method.

[0129] In this application, the time-frequency position arrangement of SRS resources sent in multiple periods may not be exactly the same. FIG. 4D to FIG. 4F As shown in FIG. 1 , the resource allocation modes of the four periods are completely different, thus improving the flexibility of uplink reference signal resources.

[0130] In addition, when the uplink reference signal resources are periodically extended, the base station needs to notify the terminal device of the period-related configuration in advance so that the terminal device can send the uplink reference signal resources in the manner indicated by the base station and the base station performs complete uplink channel detection.

[0131] Figure 5 This is a flow chart of a method for uplink precoding transmission in a smart reflector-assisted network provided by another embodiment of the present application. Figure 5 As shown, the method of this embodiment includes:

[0132] S501. The base station sends a resource configuration signaling to a terminal device.

[0133] In a traditional mobile communication system, a terminal device periodically sends uplink reference signal resources according to the parameters configured by the high-level signaling sent by the base station, wherein the transmission period of the uplink reference signal resources and the offset within the period are configured in units of time slots. Due to the introduction of intelligent reflector devices, the number of cascaded beam links has increased significantly, and it is difficult to achieve the full transmission of uplink reference signal resources that are positively correlated with the number of cascaded beam links within the traditional transmission period. Therefore, this application designs a new parameter: the uplink reference signal resource period expansion coefficient, to expand the existing transmission period by multiples.

[0134] The resource configuration signaling is used to instruct the terminal device to configure the multiple uplink reference signal resources. The resource configuration signaling includes one or more of the following contents: whether the multiple uplink reference signal resources are in a continuous transmission state, the position of each uplink reference signal resource in all uplink reference signal resources, the transmission time slot position of each uplink reference signal resource, the continuous time slot required for the base station to receive all uplink reference signal resources, and the uplink reference signal resource period expansion coefficient.

[0135] In some embodiments, the resource configuration signaling is RRC signaling, including: a first identification field, a second identification field, a third identification field, and a fourth identification field. Among them, the first identification field is used to indicate whether multiple uplink reference signal resources are in a continuous transmission state; the second identification field is used to indicate the position of each uplink reference signal resource in all uplink reference signal resources; the third identification field is used to indicate the transmission time slot position of each uplink reference signal resource; and the fourth identification field is used to indicate the continuous time slots required for the base station to receive all uplink reference signal resources.

[0136] Exemplarily, some identification fields included in the resource configuration signaling are shown in Table 2 below:

[0137] Table 2

[0138]

[0139] In some other embodiments, the resource configuration signaling includes a first newly added field and a second newly added field. The first newly added field and the second newly added field are used to indicate the uplink reference signal resource period extension coefficient in the periodic transmission type and the semi-persistent transmission type, respectively.

[0140] Exemplarily, some identification fields included in the resource configuration signaling are shown in Table 3 below:

[0141] Table 3

[0142]

[0143] Exemplarily, when the uplink reference signal resource is an SRS resource, the first newly added field and the second newly added field may be respectively configured in periodic and semi-persistent under ResourceType in the resource configuration signaling SRS-Resource.

[0144] The base station configures multiple uplink reference signal resources that need to be sent by the terminal device, takes into account the number of cascaded beam links and the uplink reference signal resource sending capability of the terminal device, and configures the time-frequency position arrangement, sending type, and period extension coefficient of the resources through existing and newly added fields in the RRC signaling.

[0145] S502. The terminal device configures the multiple uplink reference signal resources according to the resource configuration signaling.

[0146] S503: The terminal device sends multiple uplink reference signal resources on multiple cascaded beam links. Correspondingly, the base station receives multiple uplink reference signal resources through multiple cascaded beam links.

[0147] S504: The base station performs uplink channel detection according to uplink reference signal resources respectively received on multiple cascade beam links to obtain uplink channel quality estimation values ​​of the multiple cascade beam links.

[0148] S505: The base station determines a first beam codebook and a target precoding matrix used by the terminal device to send uplink data based on uplink channel quality estimation values ​​of multiple cascaded beam links.

[0149] S506: The base station sends first information to a control device of the intelligent reflector device, where the first information carries indication information of a first beam codebook.

[0150] S507: The control device configures the first beam codebook as a codebook used for performing reflection enhancement on uplink data sent by the terminal device according to the first information.

[0151] S508: The base station sends second information to the terminal device, wherein the second information carries indication information of the target precoding matrix. Accordingly, the terminal device receives the second information sent by the base station.

[0152] S509: The terminal device responds to the second information and configures the target precoding matrix as the precoding matrix used for sending uplink data.

[0153] In this embodiment, S503 to S509 are respectively Figure 2 The embodiments S201 to S207 are similar and can be referred to Figure 2 For the sake of brevity, the description of the illustrated embodiment will not be repeated here.

[0154] It should be noted that Figure 5 The illustrated embodiment is applicable when the uplink reference signal resource is an SRS resource.

[0155] In order to adapt to the situation where the number of cascaded beam links is greatly increased due to the intelligent reflector devices in the intelligent reflector assisted network, and because the intelligent reflector devices mainly reflect passively, the traditional channel detection method cannot meet the needs of the intelligent reflector assisted network, resulting in the uplink SRS signal in the uplink channel detection process is no longer applicable. Therefore, the present application adds an uplink dedicated reference signal (RIS Uplink Dedicated Reference Signal, RU-DRS) for the uplink precoding transmission process in the intelligent reflector assisted network.

[0156] Among them, this application is introduced from the aspects of RU-DRS usage indication, RU-DRS time-frequency resource configuration and RU-DRS transmission method.

[0157] 1. RU-DRS Usage Instructions

[0158] RU-DRS, like SRS, contains usage indication configuration information in each resource set, and includes "beamManagement" for beam management, "codeBook" based on codebook uplink transmission scheme, "nonCodeBook" for uplink channel information acquisition of non-codebook uplink transmission scheme, and "antennaSwitching" for downlink channel information acquisition based on antenna switching.

[0159] In the present application, when performing uplink channel detection, the terminal device sends a RU-DRS carrying a usage indication "codeBook" to the base station, indicating that the RU-DRS is an uplink signal based on the codebook uplink transmission scheme.

[0160] 2. RU-DRS time and frequency resource configuration

[0161] The RU-DRS time-frequency domain resource configuration method is similar to that described above. In the time domain, RU-DRS can be configured on 1, 2, 4, 6, 8, 10, 12 or 14 consecutive symbols of the last 14 OFDM symbols in a time slot; in the frequency domain, Comb-2 and Comb-4 are used to map to the subcarriers of a PRB, and frequency division multiplexing of RU-DRS on the same PRB with the terminal device can be achieved. Time division multiplexing of 14 OFDM symbols in the same time slot can also be achieved, so that multiple uplink reference signal resources occupy different OFDM symbols of the same PRB subcarrier, and time division multiplexing of RU-DRS on the same PRB with the terminal device can be achieved.

[0162] The cyclic shift of the RU-DRS sequence in the code domain is used to distinguish RU-DRS resources of different beam codebooks of the same intelligent reflection surface device or the same beam codebook of different intelligent reflection surface devices, so that the base station side can distinguish different intelligent reflection surface devices and the beam codebooks used by the intelligent reflection surface devices through cyclic shift.

[0163] For example, refer to Fig. 6A and Figure 6B The example shows the time-frequency multiplexing and code domain multiplexing of RU-DRS resources.

[0164] in, Fig. 6AThe example shows that a time slot contains 14 OFDM symbols, which are used to carry the time-frequency position arrangement of 6 RU-DRS resources. Among them, RU-DRS resource 1 occupies OFDM symbols 2 to 13, and is mapped to subcarriers 0, 4, and 8 in Comb-4 mode; RU-DRS resource 2 occupies OFDM symbols 10 to 13, and is mapped to subcarriers 1, 5, and 9 in Comb-4 mode; RU-DRS resource 3 occupies OFDM symbols 12 and 13, and is mapped to subcarriers 2, 6, and 10 in Comb-4 mode; RU-DRS resource 4 occupies OFDM symbol 13, and is mapped to subcarriers 3, 7, and 11 in Comb-4 mode; RU-DRS resource 5 occupies OFDM symbols 6 to 11, and is mapped to subcarriers 2, 6, and 10 in Comb-4 mode; RU-DRS resource 6 occupies OFDM symbols 5 to 12, and is mapped to subcarriers 3, 7, and 11 in Comb-4 mode.

[0165] It should be noted that RU-DRS resources 1 and RU-DRS resources 2 occupy different OFDM symbols of different subcarriers, realizing frequency domain symbol extension; RU-DRS resources 3 and RU-DRS resources 5 occupy different OFDM symbols of the same subcarrier, realizing time domain symbol extension; RU-DRS resources 4 and RU-DRS resources 6 occupy different OFDM symbols of the same subcarrier, realizing time domain symbol extension.

[0166] in, Figure 6B The example shows how to distinguish RU-DRS resources of different beam codebooks of the same intelligent reflector device or the same beam codebook of different intelligent reflector devices through cyclic shift when the RU-DRS sequence length is 9. In this application, cyclic shift of the RU-DRS sequence refers to logically shifting the RU-DRS sequence, and each shift moves the first bit of the RU-DRS sequence to the last bit of the RU-DRS sequence. For example Figure 6B As shown, the initial RU-DRS sequence is sequence 1, which is used to distinguish the RU-DRS resources reflected by the intelligent reflection surface device #1 (i.e., RIS#1); a RU-DRS sequence cyclic shift operation is performed to move the first bit of the initial RU-DRS sequence to the last bit, forming sequence 2, which is used to distinguish the RU-DRS resources reflected by the intelligent reflection surface device #2 (i.e., RIS#2); a RU-DRS sequence cyclic shift operation is performed to move the first bit of sequence 2 to the last bit, forming sequence 3, which is used to distinguish the RU-DRS resources reflected by the intelligent reflection surface device #3 (i.e., RIS#3); and so on, until the cyclic shift is completed. It should be noted that each RU-DRS sequence cyclic shift operation is performed on the basis of the sequence obtained by the previous RU-DRS sequence cyclic shift operation.

[0167] In summary, time-frequency multiplexing and code domain multiplexing improves the efficiency of terminal devices in sending RU-DRS, and the base station side can accurately distinguish different smart reflector devices and the beam codebooks used by the smart reflector devices.

[0168] 3. RU-DRS sending method

[0169] This application uses DCI signaling to quickly trigger non-periodic transmission of RU-DRS.

[0170] Figure 7 This is a flow chart of a method for uplink precoding transmission in a smart reflector-assisted network provided in an embodiment of the present application. Figure 7 As shown, the method of this embodiment includes:

[0171] S701, the base station sends a DCI signaling to the terminal device, instructing the terminal device to send an RU-DRS resource. Correspondingly, the terminal device receives the DCI signaling sent by the base station.

[0172] S702: The terminal device responds to the DCI signaling and sends RU-DRS resources on the cascaded beam link indicated by the DCI signaling. Correspondingly, the base station sends RU-DRS resources on the cascaded beam link indicated by the DCI signaling.

[0173] Each time the terminal device receives a DCI signaling, it sends a corresponding RU-DRS. The DCI signaling contains an Lbit RU-DRS trigger signaling, which can represent 2 L One of the states indicates that aperiodic RU-DRS transmission is not triggered, and the other two L -1 state corresponds to one or more RU-DRS resource sets indicated by the triggering base station through high-level signaling (resource configuration signaling). Among them, the length of the RU-DRS trigger signaling can be preset or set by the base station according to the number of cascaded beam links, which is not limited in this application.

[0174] S701 and S702 are repeatedly executed until the base station receives RU-DRS resources on all cascaded beam links. It should be noted that the state represented by the RU-DRS trigger signaling in the DCI signaling sent by the base station each time is different. This is beneficial for the base station to perform complete uplink channel detection, avoid the terminal device repeatedly sending RU-DRS resources on a cascaded beam link, and avoid the terminal device missing the sending of RU-DRS resources on one or more cascaded beam links.

[0175] S703: The base station performs uplink channel detection according to the RU-DRS resources respectively received on the multiple cascade beam links to obtain uplink channel quality estimation values ​​of the multiple cascade beam links.

[0176] S704: The base station determines a first beam codebook and a target precoding matrix used by the terminal device to send uplink data based on uplink channel quality estimation values ​​of multiple cascaded beam links.

[0177] S705. The base station sends first information to a control device of the intelligent reflector device, where the first information carries indication information of a first beam codebook.

[0178] S706. The control device configures the first beam codebook as a codebook used for performing reflection enhancement on uplink data sent by the terminal device according to the first information.

[0179] S707: The base station sends second information to the terminal device, wherein the second information carries indication information of the target precoding matrix. Accordingly, the terminal device receives the second information sent by the base station.

[0180] S708. The terminal device responds to the second information and configures the target precoding matrix as the precoding matrix used for sending uplink data.

[0181] The method of this embodiment triggers the terminal device to send uplink dedicated reference signal resources through DCI signaling. The uplink dedicated reference signal resources are adapted to the intelligent reflector auxiliary network, which solves the problem that the traditional SRS signal cannot adapt to the intelligent reflector auxiliary network using the existing protocol.

[0182] Next, through Figure 8 The illustrated embodiment introduces how a base station determines a first beam codebook and a target precoding matrix. Figure 8 This is a flow chart of a method for uplink precoding transmission in a smart reflector-assisted network provided in an embodiment of the present application. Figure 8 As shown, the method of this embodiment includes:

[0183] S801. The base station establishes an uplink channel estimation parameter matrix for each smart reflector device in the smart reflector auxiliary network according to uplink channel quality estimation values ​​of multiple cascaded beam links.

[0184] Specifically, the same RIS identifier represents the same intelligent reflection surface device, and therefore, data with the same RIS identifier is integrated to establish an uplink channel quality estimation parameter matrix with a size of M×N×K.

[0185] Taking the case where the terminal device supports M beams and M=m as an example, the uplink channel estimation parameter matrix is: Wherein, N is the number of beam codebooks of the intelligent reflector device, K is the number of receiving beams of the base station, and j is the RIS identifier.

[0186] S802: For each smart reflecting surface device, determine a maximum value in an uplink channel quality estimation parameter matrix corresponding to the smart reflecting surface device as a first candidate value.

[0187] S803: Determine a codebook used by the smart reflecting surface device corresponding to the first maximum value among all the first candidate values ​​when performing reflection enhancement on uplink reference signal resources as a first beam codebook.

[0188] For example, for the intelligent reflector device identified as j, determine the uplink channel estimation parameter matrix The maximum value among is the first candidate value. The maximum value coordinate in is (n j ,k j ), the beam codebook corresponding to the maximum value is the candidate codebook. In this way, there are R first candidate values ​​for the R smart reflector devices in the smart reflector auxiliary network, and the R first candidate values ​​correspond to R candidate codebooks.

[0189] The base station then determines the maximum value among the R first candidate values, that is, the first maximum value, and determines the beam codebook corresponding to the first maximum value as the first beam codebook. This can be expressed as:

[0190] Among them, r is the maximum value among the R first candidate values, and is the RIS identifier under the maximum uplink channel estimation value for sending uplink reference signal resources; t is the beam codebook identifier used by the intelligent reflection surface device identified as r during uplink channel detection, and the beam codebook used by the intelligent reflection surface device identified as r during uplink channel detection is the first beam codebook, which is also the RIS optimal beam codebook.

[0191] Through the method of this embodiment, the base station determines the optimal RIS beam codebook based on the uplink channel detection result.

[0192] Fig. 9 This is a flow chart of a method for uplink precoding transmission in a smart reflector-assisted network provided by another embodiment of the present application. Fig. 9 As shown, the method of this embodiment includes:

[0193] S901. The base station establishes a second uplink channel estimation parameter matrix for each beam supported by the terminal device according to the uplink channel quality estimation values ​​of multiple cascaded beam links; the second uplink channel estimation parameter matrix includes the uplink channel estimation values ​​of each cascaded beam link in which a beam supported by the terminal device participates.

[0194] S902: The base station determines, based on the second maximum value in all second uplink channel quality estimation parameter matrices, a precoding matrix used by the terminal device to send uplink reference signal resources at the second maximum value as a target precoding matrix.

[0195] Taking the terminal device supporting M beams as an example, for beam m, the base station establishes the second uplink channel estimation parameter matrix corresponding to beam m: The second uplink channel estimation parameter matrix Including: uplink channel estimation values ​​of each cascade beam link in which beam m participates.

[0196] The base station establishes an uplink channel estimation maximum value set according to each second uplink channel estimation parameter matrix, that is, ,Table r,t shows,s,1 row≤signal s≤channel M, the maximum value in the estimated maximum value set, that is, the second maximum value, s is the beam identifier corresponding to the second maximum value, and the base station determines the precoding matrix used by the terminal device when sending uplink reference signal resources under beam s as the target precoding matrix.

[0197] Through the method of this embodiment, the base station determines the optimal uplink transmission precoding matrix on the terminal device side based on the uplink channel detection result.

[0198] In summary, the present application designs the configuration process of the uplink precoding matrix and the first beam codebook, and designs the time-frequency position arrangement and triggering method of the uplink reference signal resources of the cascaded beam link, so that the uplink reference signal resources are adapted to the intelligent reflection surface assisted network to achieve complete uplink channel detection.

[0199] Fig.10 The communication device 1000 provided in this embodiment can exist independently or be integrated in other devices, and can communicate with the terminal device mentioned above through the intelligent reflective surface device, so as to implement the operation corresponding to the base station in any of the above method embodiments.

[0200] The communication device 1000 may include: a transceiver module 1001 and a processing module 1002. The processing module 1002 is used to perform data processing, and the transceiver module 1001 may implement corresponding communication functions. The transceiver module 1001 may also be called a communication interface or a communication unit.

[0201] Optionally, the communication device 1000 may further include a storage unit, which may be used to store instructions and / or data, and the processing module 1002 may read the instructions and / or data in the storage unit so that the communication device 1000 implements the operations performed by the base station in the aforementioned method embodiment.

[0202] The transceiver module 1001 is used to perform the reception-related operations of the base station in the above method embodiment, and the processing module 1002 is used to perform the processing-related operations of the base station in the above method embodiment.

[0203] Optionally, the transceiver module 1001 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiment. The receiving module is used to perform the receiving operation in the above method embodiment.

[0204] It should be noted that the communication device 1000 may include a sending module but not a receiving module. Alternatively, the communication device 1000 may include a receiving module but not a sending module. Specifically, it may depend on whether the above solution executed by the communication device 1000 includes a sending action and a receiving action.

[0205] As an example, the communication device 1000 is used to execute the above Figure 2 Actions performed by the base station in the illustrated embodiment.

[0206] The communication device 1000 may include: a transceiver module 1001 and a processing module 1002 .

[0207] The transceiver module 1001 is used to receive multiple uplink reference signal resources sent by the terminal device on multiple cascaded beam links when the at least one intelligent reflecting surface device is turned on; the cascaded beam link is an uplink transmission link formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of cascaded beam links.

[0208] The processing module 1002 is used to perform uplink channel detection according to the uplink reference signal resources respectively received on the multiple cascade beam links to obtain uplink channel quality estimation values ​​of the multiple cascade beam links, and the base station determines the first beam codebook and the target precoding matrix used by the terminal device when sending uplink data based on the uplink channel quality estimation values ​​of the multiple cascade beam links; the first beam codebook is a codebook used by the first intelligent reflection surface device when the terminal device performs reflection enhancement on the uplink reference signal resource during the uplink channel detection process; the first intelligent reflection surface device is the intelligent reflection surface device with the strongest reflection enhancement capability among the at least one intelligent reflection surface device;

[0209] The transceiver module 1001 is also used to send first information to the control device; the first information carries indication information of the first beam codebook, and the first information is used to instruct the control device to configure the first beam codebook as a codebook used by the at least one intelligent reflection surface device to perform reflection enhancement on the uplink data sent by the terminal device; and, send second information to the terminal device; the second information carries indication information of the target precoding matrix, and the second information instructs the terminal device to configure the target precoding matrix as a precoding matrix used to send uplink data.

[0210] It should be understood that the execution of the above-mentioned corresponding processes by each module has been described in detail in the above-mentioned method embodiment, and for the sake of brevity, it will not be repeated here.

[0211] The processing module 1002 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver module 1001 can be implemented by a transceiver or a transceiver-related circuit. The transceiver module 1001 can also be called a communication unit or a communication interface. The storage unit can be implemented by at least one memory.

[0212] Fig.11 The communication device 1100 provided in this embodiment can exist independently or be integrated in other devices, and can communicate with the base station mentioned above through the intelligent reflective surface device to implement the operation corresponding to the terminal device in any of the above method embodiments.

[0213] The communication device 1100 may include: a transceiver module 1101 and a processing module 1102. The processing module 1102 is used to perform data processing, and the transceiver module 1101 may implement corresponding communication functions. The transceiver module 1101 may also be called a communication interface or a communication unit.

[0214] Optionally, the communication device 1100 may further include a storage unit, which may be used to store instructions and / or data, and the processing module 1102 may read the instructions and / or data in the storage unit so that the communication device 1100 implements the operations performed by the terminal device in the aforementioned method embodiment.

[0215] The transceiver module 1101 is used to perform reception-related operations of the terminal device in the foregoing method embodiment, and the processing module 1102 is used to perform processing-related operations of the terminal device in the foregoing method embodiment.

[0216] Optionally, the transceiver module 1101 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiment. The receiving module is used to perform the receiving operation in the above method embodiment.

[0217] It should be noted that the communication device 1100 may include a sending module but not a receiving module. Alternatively, the communication device 1100 may include a receiving module but not a sending module. Specifically, it depends on whether the above solution executed by the communication device 1100 includes a sending action and a receiving action.

[0218] As an example, the communication device 1100 is used to execute the above Figure 2 Actions performed by the terminal device in the illustrated embodiment.

[0219] The communication device 1100 may include: a transceiver module 1101 and a processing module 1102 .

[0220] The transceiver module 1101 is used to send multiple uplink reference signal resources on multiple cascaded beam links, where the cascaded beam links are uplink transmission links formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of cascaded beam links; the multiple uplink reference signal resources are used for uplink channel detection of the multiple cascaded beam links; the uplink channel detection of the multiple cascaded beam links is used to determine the target precoding matrix of the terminal device.

[0221] The transceiver module 1101 is also used to receive second information sent by the base station; the second information carries indication information of the target precoding matrix, and the second information indicates that the terminal device configures the target precoding matrix as the precoding matrix used to send uplink data.

[0222] The processing module 1102 is used to configure the target precoding matrix according to the second information.

[0223] It should be understood that the execution of the above-mentioned corresponding processes by each module has been described in detail in the above-mentioned method embodiment, and for the sake of brevity, it will not be repeated here.

[0224] The processing module 1102 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver module 1101 can be implemented by a transceiver or a transceiver-related circuit. The transceiver module 1101 can also be called a communication unit or a communication interface. The storage unit can be implemented by at least one memory.

[0225] Fig.12The communication device 1200 provided in this embodiment can exist independently or be integrated in other devices, and can communicate with the base station mentioned above to implement the operation corresponding to the control device in any of the above method embodiments.

[0226] The communication device 1200 may include: a transceiver module 1201 and a processing module 1202. The processing module 1202 is used to perform data processing, and the transceiver module 1201 may implement corresponding communication functions. The transceiver module 1201 may also be called a communication interface or a communication unit.

[0227] Optionally, the communication device 1200 may further include a storage unit, which may be used to store instructions and / or data, and the processing module 1202 may read the instructions and / or data in the storage unit so that the communication device 1200 implements the operations performed by the control device in the aforementioned method embodiment.

[0228] The transceiver module 1201 is used to execute the reception-related operations of the control device in the foregoing method embodiment, and the processing module 1202 is used to execute the processing-related operations of the control device in the foregoing method embodiment.

[0229] Optionally, the transceiver module 1201 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiment. The receiving module is used to perform the receiving operation in the above method embodiment.

[0230] It should be noted that the communication device 1200 may include a sending module but not a receiving module. Alternatively, the communication device 1200 may include a receiving module but not a sending module. Specifically, it may depend on whether the above solution executed by the communication device 1200 includes a sending action and a receiving action.

[0231] As an example, the communication device 1200 is used to execute the above Figure 2 The actions performed by the control device in the illustrated embodiment.

[0232] The communication device 1200 may include: a transceiver module 1201 and a processing module 1202 .

[0233] The processing module 1202 is used to control the intelligent reflecting surface device to be turned on, so that the at least one intelligent reflecting surface device performs reflection enhancement on the uplink reference signal resources sent by the terminal device on multiple cascaded beam links; the cascaded beam link is an uplink transmission link formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of cascaded beam links; the multiple uplink reference signal resources are used for uplink channel detection of the multiple cascaded beam links; the uplink channel detection of the multiple cascaded beam links is used to determine the first beam codebook of the at least one intelligent reflecting surface device.

[0234] The transceiver module 1201 is used to receive first information sent by the base station, where the first information carries indication information of the first beam codebook, and the first information is used to instruct the control device to configure the first beam codebook as a codebook used by the at least one intelligent reflection surface device to perform reflection enhancement on the uplink data sent by the terminal device; and, in response to the first information, configure the first beam codebook as a codebook used by the at least one intelligent reflection surface device to perform reflection enhancement on the uplink data sent by the terminal device.

[0235] It should be understood that the execution of the above-mentioned corresponding processes by each module has been described in detail in the above-mentioned method embodiment, and for the sake of brevity, it will not be repeated here.

[0236] The processing module 1202 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver module 1201 can be implemented by a transceiver or a transceiver-related circuit. The transceiver module 1201 can also be called a communication unit or a communication interface. The storage unit can be implemented by at least one memory.

[0237] Fig.13 For a structural diagram of an electronic device provided in an embodiment of the present application, please refer to Fig.13 As shown, the electronic device 1300 provided in this embodiment includes: a memory 1301 and a processor 1302 .

[0238] The memory 1301 may be an independent physical unit, and may be connected to the processor 1302 via a bus 1303. The memory 1301 and the processor 1302 may also be integrated together and implemented by hardware, etc. The memory 1301 is used to store program instructions, and the processor 1302 calls the program instructions to execute the operations performed by the control device of the base station or the terminal or the intelligent reflective surface device in any of the above method embodiments.

[0239] Optionally, when part or all of the methods of the above embodiments are implemented by software, the electronic device 1300 may also include only a processor 1302. The memory 1301 for storing programs is located outside the electronic device 1300, and the processor 1302 is connected to the memory through circuits / wires for reading and executing the programs stored in the memory. The processor 1302 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP. The processor 1302 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0240] The memory 1301 may include a volatile memory, such as a random-access memory (RAM); the memory may also include a non-volatile memory, such as a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the memory may also include a combination of the above types of memory.

[0241] Exemplarily, the present application provides a chip, comprising: an interface circuit and a logic circuit, wherein the interface circuit is used to receive signals from other chips outside the chip and transmit them to the logic circuit, or to send signals from the logic circuit to other chips outside the chip, and the logic circuit is used to execute the operations performed by the control device of the base station or terminal or intelligent reflective surface device in any of the above method embodiments.

[0242] Illustratively, the present application provides a readable storage medium having computer program instructions stored thereon, and the computer program instructions are executed by a processor of an electronic device so that the electronic device performs the operations performed by the control device of the base station or terminal or intelligent reflective surface device in any of the above method embodiments.

[0243] Illustratively, the present application provides a computer program product, which, when executed on an electronic device, enables the electronic device to execute the operations executed by the control device of the base station or terminal or intelligent reflective surface device in any of the above method embodiments.

[0244] Exemplarily, the present application provides a mobile communication system, comprising: a base station, a terminal device, an intelligent reflective surface device and a control device, wherein the control device is connected to the intelligent reflective surface device, and the base station, the terminal device and the control device are respectively used to execute the operations respectively performed in the aforementioned method embodiments.

[0245] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for uplink precoding transmission in a smart reflector-assisted network, characterized in that: The method is applied to an intelligent reflective surface auxiliary network, the intelligent reflective surface auxiliary network comprising: a terminal device, a base station and at least one intelligent reflective surface device, the at least one intelligent reflective surface device being used to enhance reflection of an uplink signal sent by the terminal device to the base station; and the at least one intelligent reflective surface device being connected to a control device; the method is applied to the base station, the method comprising: When the at least one intelligent reflecting surface device is turned on, the base station receives multiple uplink reference signal resources sent by the terminal device on multiple cascaded beam links; the cascaded beam link is an uplink transmission link formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device, and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device, and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of the cascaded beam links; The base station performs uplink channel detection according to the uplink reference signal resources respectively received on the multiple cascade beam links to obtain uplink channel quality estimation values ​​of the multiple cascade beam links, and the base station determines a first beam codebook and a target precoding matrix used by the terminal device when sending uplink data based on the uplink channel quality estimation values ​​of the multiple cascade beam links; the first beam codebook is a codebook used by the first intelligent reflection surface device when the terminal device performs reflection enhancement on the uplink reference signal resource during the uplink channel detection process; the first intelligent reflection surface device is an intelligent reflection surface device with the strongest reflection enhancement capability among the at least one intelligent reflection surface device; The base station sends first information to the control device; the first information carries indication information of the first beam codebook, and the first information is used to instruct the control device to configure the first beam codebook as a codebook used by the at least one intelligent reflection surface device to perform reflection enhancement on uplink data sent by the terminal device; The base station sends second information to the terminal device; the second information carries indication information of the target precoding matrix, and the second information instructs the terminal device to configure the target precoding matrix as a precoding matrix used for sending uplink data.

2. The method according to claim 1, characterized in that The multiple uplink reference signal resources are sent through physical resource blocks PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and each of the uplink reference signal resources occupies N consecutive OFDM symbols in the time slot, where N=1, 2, 4, 6, 8, 10, 12, 14.

3. The method according to claim 2, characterized in that The same subcarrier on the PRB carries two or more uplink reference signal resources carrying different resource identifiers.

4. The method according to any one of claims 1 to 3, characterized in that: The multiple uplink reference signal resources are sent through a PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and the at least one uplink reference signal resource is mapped to the subcarrier of the PRB through comb Comb-2 and Comb-4 methods.

5. The method according to claim 4, characterized in that When the multiple uplink reference signal resources are sent through PRBs of multiple time slots, the maximum number of uplink reference signal resources that can be carried by the multiple PRBs is the same, and the time-frequency position arrangements of the uplink reference signal resources in the multiple PRBs are not completely the same.

6. The method according to claim 5, characterized in that Before the base station receives multiple uplink reference signal resources sent by the terminal device on multiple cascade beam links, the method further includes: The base station sends a resource configuration signaling to the terminal device, where the resource configuration signaling is used to instruct the terminal device to configure the multiple uplink reference signal resources; The resource configuration signaling includes the following contents: whether the multiple uplink reference signal resources are in a continuous transmission state, the position of each uplink reference signal resource in all uplink reference signal resources, the transmission time slot position of each uplink reference signal resource, and the continuous time slot required for the base station to receive all uplink reference signal resources; or, The resource configuration signaling includes: an uplink reference signal resource period extension coefficient.

7. The method according to claim 6, characterized in that When the resource configuration signaling includes the uplink reference signal resource period extension coefficient: When the uplink reference signal resource is of a periodic transmission type, the resource configuration signaling includes a first newly added field, and the first newly added field indicates a period extension coefficient of an uplink reference signal resource of the periodic transmission type; When the uplink reference signal resource is of a semi-persistent transmission type, the resource configuration signaling includes a second newly added field, where the second newly added field indicates a period extension coefficient of an uplink reference signal resource of the semi-persistent transmission type; The value of the newly added field is a first state value or a second state value, the first state value indicates that the uplink reference signal resource period extension coefficient is an integer state not less than 1, and the second state value indicates that the uplink reference signal resource period extension coefficient is a decimal state not exceeding 1.

8. The method according to any one of claims 1 to 3, characterized in that: The uplink reference signal resource is an uplink dedicated reference signal resource, and the uplink dedicated reference signal resource carries usage indication configuration information, and the usage indication configuration information is used to indicate that the uplink dedicated reference signal resource is a codebook-based uplink transmission; the uplink dedicated reference signal resource is a cyclic shift sequence generated by the terminal device by cyclically shifting a basic sequence, and the number of bits prepended to the end data in the cyclic shift sequence indicates the intelligent reflector device beam codebook corresponding to the uplink dedicated reference signal resource.

9. The method according to claim 8, characterized in that The base station receives a plurality of uplink reference signal resources sent by the terminal device on a plurality of cascaded beam links, including: The base station sends a downlink control information DCI signaling to the terminal device, wherein the DCI signaling is used to trigger the terminal device to send an uplink dedicated reference signal resource on one of the cascaded beam links; the DCI signaling includes L bits, where L is a positive integer greater than 1, and the L bits can be used to indicate 2 L states, the 2 L One of the states is used to indicate that the non-periodic uplink dedicated reference signal resource transmission is not triggered, and the two L The remaining 2 L -1 state is used to indicate the multiple uplink dedicated reference signal resources respectively; The base station receives an uplink dedicated reference signal resource sent by the terminal device in response to the DCI signaling on one of the cascaded beam links; the process is repeated until the base station successfully receives the multiple uplink dedicated reference signal resources through all of the cascaded beam links.

10. The method according to claim 1, characterized in that The base station determines, based on uplink channel quality estimation values ​​of the multiple cascaded beam links, a first beam codebook, including: The base station establishes a first uplink channel estimation parameter matrix for each of the smart reflector devices in the smart reflector auxiliary network according to the uplink channel quality estimation values ​​of the multiple cascade beam links; the first uplink channel estimation parameter matrix includes uplink channel estimation values ​​of each cascade beam link in which the smart reflector device participates; For each of the smart reflecting surface devices, determining a maximum value in the first uplink channel quality estimation parameter matrix corresponding to the smart reflecting surface device as a first candidate value; A codebook used by a smart reflecting surface device corresponding to a first maximum value among all the first candidate values ​​when performing reflection enhancement on an uplink reference signal resource is determined as the first beam codebook.

11. The method according to claim 1, characterized in that: The base station determines, based on the uplink channel quality estimation values ​​of the multiple cascaded beam links, a target precoding matrix used by the terminal device when sending an uplink signal, including: The base station establishes a second uplink channel estimation parameter matrix for each beam supported by the terminal device according to the uplink channel quality estimation values ​​of the multiple cascade beam links; the second uplink channel estimation parameter matrix includes uplink channel estimation values ​​of each cascade beam link in which a beam supported by the terminal device participates; The base station determines, based on the second maximum value in all the second uplink channel quality estimation parameter matrices, a precoding matrix used by the terminal device to send uplink reference signal resources under the second maximum value as the target precoding matrix.

12. The method according to claim 1, characterized in that The method further comprises: The base station determines a target receiving direction according to the first beam codebook and the target precoding matrix; The base station receives, in the target receiving direction, uplink data sent by the terminal device through the multiple cascaded beam links; the uplink data adopts the target precoding matrix; the smart reflection surface device on the multiple cascaded beam links uses the first beam codebook to enhance reflection of the uplink data; The base station demodulates and decodes the uplink data to obtain the uplink data.

13. A method for uplink precoding transmission in an intelligent reflector-assisted network, characterized in that: The method is applied to an intelligent reflective surface auxiliary network, the intelligent reflective surface auxiliary network comprising: a terminal device, a base station and at least one intelligent reflective surface device, the at least one intelligent reflective surface device being used to enhance reflection of an uplink signal sent by the terminal device to the base station; and the at least one intelligent reflective surface device is connected to a control device; the method is applied to the terminal device, the method comprising: The terminal device sends multiple uplink reference signal resources on multiple cascaded beam links, and the cascaded beam links are uplink transmission links formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device, and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device, and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of the cascaded beam links; the multiple uplink reference signal resources are used for uplink channel detection of the multiple cascaded beam links; the uplink channel detection of the multiple cascaded beam links is used to determine the target precoding matrix of the terminal device; The terminal device receives second information sent by the base station; the second information carries indication information of a target precoding matrix, and the second information indicates that the terminal device configures the target precoding matrix as a precoding matrix used for sending uplink data; The terminal device configures the target precoding matrix according to the second information.

14. The method according to claim 13, characterized in that The multiple uplink reference signal resources are sent through physical resource blocks PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and each of the uplink reference signal resources occupies N consecutive OFDM symbols in the time slot, where N=1, 2, 4, 6, 8, 10, 12, 14.

15. The method according to claim 14, characterized in that The same subcarrier on the PRB carries two or more uplink reference signal resources carrying different resource identifiers.

16. The method according to any one of claims 13 to 15, characterized in that The multiple uplink reference signal resources are sent through a PRB corresponding to one time slot or multiple time slots; the PRB of each time slot contains at least one uplink reference signal resource, and the at least one uplink reference signal resource is mapped to the subcarrier of the PRB through comb Comb-2 and Comb-4 methods.

17. The method according to claim 16, characterized in that When the multiple uplink reference signal resources are sent through PRBs of multiple time slots, the maximum number of uplink reference signal resources that can be carried by the multiple PRBs is the same, and the time-frequency position arrangements of the uplink reference signal resources in the multiple PRBs are not completely the same.

18. The method according to claim 13, characterized in that Before the terminal device sends multiple uplink reference signal resources on multiple cascaded beam links, the method further includes: The terminal device receives resource configuration signaling sent by the base station, and the resource configuration signaling is used to instruct the terminal device to configure the multiple uplink reference signal resources; wherein the resource configuration signaling includes the following contents: whether the multiple uplink reference signal resources are in a continuous transmission state, the position of each uplink reference signal resource in all uplink reference signal resources, the transmission time slot position of each uplink reference signal resource, and the continuous time slot required for the base station to receive all uplink reference signal resources; or, the resource configuration signaling includes: an uplink reference signal resource period extension coefficient; The terminal device configures the multiple uplink reference signal resources based on the resource configuration signaling.

19. The method according to claim 18, characterized in that When the resource configuration signaling includes the uplink reference signal resource period extension coefficient: When the uplink reference signal resource is of a periodic transmission type, the resource configuration signaling includes a first newly added field, where the first newly added field indicates a period extension coefficient of an uplink reference signal resource of the periodic transmission type; When the uplink reference signal resource is of a semi-persistent transmission type, the resource configuration signaling includes a second newly added field, where the second newly added field indicates a period extension coefficient of an uplink reference signal resource of the semi-persistent transmission type; The value of the newly added field is a first state value or a second state value, the first state value indicates that the uplink reference signal resource period extension coefficient is an integer state not less than 1, and the second state value indicates that the uplink reference signal resource period extension coefficient is a decimal state not exceeding 1.

20. The method according to claim 13, characterized in that The terminal device sends multiple uplink reference signal resources on multiple cascaded beam links, including: The terminal device performs a cyclic shift on the basic sequence to generate a cyclic shift sequence corresponding to an uplink dedicated reference signal resource; wherein the uplink dedicated reference signal resource carries usage indication configuration information, and the usage indication configuration information is used to indicate that the uplink dedicated reference signal resource is a codebook-based uplink transmission; the number of bits prepended to the end data of the cyclic shift sequence indicates the smart reflector device beam codebook corresponding to the uplink dedicated reference signal resource; The terminal device sends multiple uplink dedicated reference signal resources on the multiple cascaded beam links.

21. The method according to claim 20, characterized in that The terminal device sends multiple uplink dedicated reference signal resources on the multiple cascaded beam links, including: The terminal device receives DCI signaling sent by the base station, where the DCI signaling is used to trigger the terminal device to send an uplink dedicated reference signal resource on one of the cascaded beam links; the DCI signaling includes L bits, where L is a positive integer greater than 1, and the L bits can be used to indicate 2 L states, the 2 L One of the states is used to indicate that the non-periodic uplink dedicated reference signal resource transmission is not triggered, and the two L The remaining 2 L -1 state is used to indicate the multiple uplink dedicated reference signal resources respectively; The terminal device sends an uplink dedicated reference signal resource on one of the cascaded beam links in response to the DCI signaling; the execution is repeated until the terminal device successfully sends the multiple uplink dedicated reference signal resources on all the cascaded beam links.

22. The method according to claim 13, characterized in that The method further comprises: The terminal device sends uplink data to the base station using the target precoding matrix.

23. A method for uplink precoding transmission in an intelligent reflector-assisted network, characterized in that: The method is applied to an intelligent reflective surface auxiliary network, the intelligent reflective surface auxiliary network comprising: a terminal device, a base station and at least one intelligent reflective surface device, the at least one intelligent reflective surface device being used to enhance reflection of an uplink signal sent by the terminal device to the base station; and the at least one intelligent reflective surface device is connected to a control device; the method is applied to the control device, the method comprising: The control device controls the at least one intelligent reflecting surface device to be turned on, so that the at least one intelligent reflecting surface device performs reflection enhancement on the uplink reference signal resources sent by the terminal device on multiple cascaded beam links; the cascaded beam link is an uplink transmission link formed by cascading a beam supported by the terminal device, a beam supported by the at least one intelligent reflecting surface device, and a beam of the base station; the number of the cascaded beam links is related to the number of beams supported by the terminal device, the number of beams supported by the at least one intelligent reflecting surface device, and the number of beams supported by the base station; the number of uplink reference signal resources is related to the number of the cascaded beam links; the multiple uplink reference signal resources are used for uplink channel detection of the multiple cascaded beam links; the uplink channel detection of the multiple cascaded beam links is used to determine the first beam codebook of the at least one intelligent reflecting surface device; The control device receives first information sent by the base station, where the first information carries indication information of the first beam codebook, and the first information is used to instruct the control device to configure the first beam codebook as a codebook used by the at least one intelligent reflection surface device to perform reflection enhancement on uplink data sent by the terminal device; In response to the first information, the control device configures the first beam codebook as a codebook used by the at least one intelligent reflecting surface device to perform reflection enhancement on uplink data sent by the terminal device.

24. A communication device, characterized in that: include: Memory and processor; The memory is configured to store computer program instructions; The processor is configured to execute the computer program instructions so that the communication device implements the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 22, or the method according to claim 23.

25. A readable storage medium, characterized in that: include: Computer program instructions; an electronic device runs the computer program instructions so that the electronic device implements the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 22, or the method according to claim 23.

26. A chip, characterized in that: include: An interface circuit and a logic circuit, wherein the interface circuit is used to receive signals from other chips outside the chip and transmit them to the logic circuit, or to send signals from the logic circuit to other chips outside the chip, and the logic circuit is used to implement the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 22, or the method according to claim 23.

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