Signal transmission method and communication apparatus

Abstract

The present application provides a signal transmission method and a communication apparatus. The method may comprise: receiving first instruction information, wherein the first instruction information is used for instructing to perform first processing on an intelligent surface, and the first processing comprises adjusting some or all coefficients of the intelligent surface; receiving a first signal from a first communication apparatus; and sending a second signal to a second communication apparatus, wherein the second signal is obtained by processing the first signal on the basis of the first processing. In the present application, some or all coefficients of the intelligent surface can be adjusted, so that a signal sent by the intelligent surface to a terminal device can carry additional information.

Description

Method and communication apparatus for signal transmission

[0001] The present application claims priority to the Chinese patent application No. 202411044802.2, filed on July 31, 2024, and entitled "Method and communication apparatus for signal transmission", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and more particularly, to a method and communication apparatus for signal transmission. BACKGROUND

[0003] Multiple-input multiple-output (MIMO) technology can utilize the spatial dimension resources to make the signal obtain array gain, multiplexing and diversity gain, and interference cancellation gain in space, and thus multiply the capacity and spectrum efficiency of the communication system without increasing the system bandwidth. However, with the increasing demand for high speed, high reliability, and low delay, modern communication systems will continue to face the challenges of greater capacity, wider coverage, and lower delay. In order to cope with the above challenges, reconfigurable intelligent surface (RIS) as a potential technology has been widely studied. How to utilize RIS is a problem worth considering. SUMMARY

[0004] The present application provides a method and communication apparatus for signal transmission, which can make the signal sent by the intelligent surface (such as RIS) to the terminal device carry additional information by adjusting part or all of the coefficients of the intelligent surface.

[0005] In a first aspect, a method for signal transmission is provided, which can be performed by a communication apparatus. The communication apparatus can be an intelligent surface (such as RIS), or can also be a chip or circuit for the intelligent surface, which is not limited in the present application. The following is described taking the intelligent surface as an example.

[0006] The method can include: receiving first indication information, the first indication information indicating that the intelligent surface performs first processing, the first processing including adjusting part or all of the coefficients of the intelligent surface; receiving a first signal from a first communication apparatus; and sending a second signal to a second communication apparatus, the second signal being obtained by processing the first signal based on the first processing.

[0007] Based on the above technical solution, after adjusting part or all of the coefficients of the intelligent surface, the beam direction and intensity of the signal sent by the intelligent surface to the second communication device will not be changed, and at the same time, based on the adjustment of part or all of the coefficients of the intelligent surface, the signal sent by the intelligent surface to the second communication device can carry additional information. For example, the additional information can be used for state detection of the intelligent surface, or the additional information can be used to deliver environmental information or sensing information of the intelligent surface, etc., providing a new path for intelligent surface application.

[0008] With reference to the first aspect, in some implementations of the first aspect, the coefficients include at least one of a phase, an amplitude, or a polarization.

[0009] With reference to the first aspect, in some implementations of the first aspect, the first indication information indicates a first set, and the first set includes the adjustment amount of adjusting part or all of the coefficients of the intelligent surface.

[0010] Optionally, the first set includes N adjustment amounts of adjusting part or all of the coefficients of the intelligent surface, and N is an integer greater than 1.

[0011] Optionally, the adjustment amount includes a phase adjustment amount.

[0012] Based on the above technical solution, the adjustment amount of adjusting part or all of the coefficients of the intelligent surface can be selected from the first set, which can reduce the complexity of the operation of the intelligent surface to implement coefficient adjustment.

[0013] With reference to the first aspect, in some implementations of the first aspect, the first indication information further indicates a base coefficient The The first processing includes adjusting part or all of the coefficients of the intelligent surface before the first processing, and the first processing includes adjusting part or all of the coefficients of the intelligent surface to The The element is selected from the first set according to a first rule.

[0014] With reference to the first aspect, in some implementations of the first aspect, the first rule indicates an order of selecting elements from the first set.

[0015] With reference to the first aspect, in some implementations of the first aspect, the first indication information further indicates a period and / or the first rule, and the period represents a period of adjusting part or all of the coefficients of the intelligent surface.

[0016] With reference to the first aspect, in some implementations of the first aspect, the first indication information indicates a time-varying function The first indication information indicates an adjustment amount of adjusting part or all coefficients of the smart surface at t0. The first indication information indicates an adjustment amount of adjusting part or all coefficients of the smart surface at t0.

[0017] Optionally, the adjustment amount can include a phase adjustment amount.

[0018] As an example, the smart surface can calculate the adjustment amount at different time instants as and based on The basis coefficients are adjusted and loaded / acted on the array elements. That is, the first indication information indicates a time-varying function After that, the smart surface can automatically determine the coefficient adjustment amount at a certain time instant.

[0019] Based on the above technical solution, the adjustment amount of adjusting part or all coefficients of the smart surface can be determined according to the time-varying function. For example, the same beam information can be generated by traversing different coefficients of the smart surface through the time-varying function, which helps to maintain the beamforming performance of the system when facing partial element failure or coefficient adjustment error, and can improve the robustness of the smart surface when carrying additional information by adjusting part or all coefficients.

[0020] In combination with the first aspect, in some implementations of the first aspect, the first indication information further indicates basis coefficients The first indication information indicates an adjustment amount of adjusting part or all coefficients of the smart surface at t0. The first indication information indicates an adjustment amount of adjusting part or all coefficients of the smart surface at t0.

[0021] In combination with the first aspect, in some implementations of the first aspect, the method can further include: receiving second indication information, the second indication information indicating an order of the first processing.

[0022] As an example, the first communication device can determine an upper limit order #B of the order of the first processing according to a beam configuration period T0 in the main information sending scenario and a period T1 indicated by the capability information.

[0023] As an example, the order #B is associated with the smart surface capability, and the order #A corresponds to the auxiliary information used for smart surface state detection and the size and accuracy of the data packet of the environmental information such as positioning assistance and sensing information.

[0024] Optionally, the order (order #A) of the first processing is less than or equal to the order #B.

[0025] As an example, the order #A can be associated with the smart surface capability, the size of the auxiliary information data packet to be modulated, or the function carried by the additional carried information, etc. For example, a larger order #A modulation can be used when the auxiliary information data packet is larger, or the order #A can be larger when the smart surface capability is stronger.

[0026] Based on the above technical solution, the modulation order of the first processing of the smart surface can be configured by the second indication information, that is, the modulation order can be adjusted by configuration, so as to adapt to the capability of the different smart surfaces, the size of the information data packet to be modulated, or the function carried by the additional carried information, etc.

[0027] In combination with the first aspect, in some implementations of the first aspect, the order of the first processing is 2, and the adjusting of the part or all of the coefficients of the smart surface includes: inverting / phase reversing or coefficient keeping of the part or all of the coefficients of the smart surface.

[0028] In combination with the first aspect, in some implementations of the first aspect, the method can further include: sending the capability information of the smart surface, the capability information indicating a minimum period of the adjusting of the part or all of the coefficients of the smart surface.

[0029] Based on the above technical solution, the smart surface can report the minimum period of the adjusting of the part or all of the coefficients, which can be associated with the maximum number of bits of the information that the smart surface can carry based on the adjusting of the part or all of the coefficients, thereby helping to determine the modulation order and other parameters of the first processing of the smart surface.

[0030] In combination with the first aspect, in some implementations of the first aspect, the capability information includes a coefficient adjustment minimum time resolution or a minimum beam keeping period.

[0031] The second aspect provides a method of signal transmission, which can be executed by a first communication device. The communication device can be a network device, or can be a chip or circuit for the network device, and the present application does not limit it. The following takes the network device as an example for description.

[0032] The method can include: sending first indication information, the first indication information indicating that the smart surface performs first processing, the first processing including adjusting part or all of the coefficients of the smart surface; sending a first signal to the smart surface, the first signal being capable of obtaining a second signal based on the first processing, the second signal being capable of being sent by the smart surface to a second communication device.

[0033] In combination with the second aspect, in some implementations of the second aspect, the coefficients include at least one of phase, amplitude, or polarization.

[0034] With reference to the second aspect, in some implementations of the second aspect, the first indication information indicates a first set, the adjustment amount of the adjustment of the part or all of the coefficients of the smart surface is included in the first set.

[0035] With reference to the second aspect, in some implementations of the second aspect, the first indication information further indicates a base coefficient The first processing includes adjusting the part or all of the coefficients of the smart surface to The first processing includes adjusting the part or all of the coefficients of the smart surface to The first processing includes adjusting the part or all of the coefficients of the smart surface to is an element selected from the first set according to a first rule.

[0036] With reference to the second aspect, in some implementations of the second aspect, the first rule indicates an order of selecting elements from the first set.

[0037] With reference to the second aspect, in some implementations of the second aspect, the first indication information further indicates a period and / or the first rule, the period representing a period of the adjustment of the part or all of the coefficients of the smart surface.

[0038] With reference to the second aspect, in some implementations of the second aspect, the first indication information indicates a time-varying function The adjustment amount of the adjustment of the part or all of the coefficients of the smart surface at t0 is The adjustment amount of the adjustment of the part or all of the coefficients of the smart surface at t0 is

[0039] With reference to the second aspect, in some implementations of the second aspect, the first indication information further indicates a base coefficient The first processing includes adjusting the part or all of the coefficients of the smart surface to The first processing includes adjusting the part or all of the coefficients of the smart surface to

[0040] With reference to the second aspect, in some implementations of the second aspect, the method can further include: sending, to the smart surface, second indication information, the second indication information indicating an order of the first processing.

[0041] With reference to the second aspect, in some implementations of the second aspect, the order of the first processing is 2, and the adjusting the part or all of the coefficients of the smart surface comprises: inverting the part or all of the coefficients of the smart surface or keeping the coefficients.

[0042] With reference to the second aspect, in some implementations of the second aspect, the method can further comprise: sending the second indication information to the second communication device.

[0043] Based on the above technical solution, the first communication device can indicate the modulation order of the first processing of the smart surface to the second communication device, thereby helping the second communication device to decode the information carried additionally by the signal transmitted by the smart surface, and realizing reliable transmission of the additional information.

[0044] With reference to the second aspect, in some implementations of the second aspect, the method can further comprise: receiving the capability information of the smart surface, the capability information indicating a minimum period of the adjusting the part or all of the coefficients of the smart surface.

[0045] With reference to the second aspect, in some implementations of the second aspect, the capability information comprises a minimum time resolution of coefficient adjustment or a minimum beam keeping period.

[0046] With reference to the second aspect, in some implementations of the second aspect, the method can further comprise: receiving feedback information, the feedback information comprising a decoding result of the second communication device on the second signal; or the feedback information indicating that the first communication device controls the smart surface to perform a first operation, the first operation comprising turning off or not controlling part of the elements of the smart surface.

[0047] Based on the above technical solution, the second communication device can feed back the decoding result of the information carried additionally by the signal transmitted by the smart surface, or the second communication device can control the smart surface through the feedback information. For example, in the application scenario of state monitoring of the smart surface, the smart surface can be controlled to turn off or not control part of the elements, thereby reducing the indication overhead and improving the flexibility and robustness of the application of the smart surface.

[0048] With reference to the second aspect, in some implementations of the second aspect, the method can further comprise: receiving third indication information, the third indication information indicating that the first communication device controls the smart surface to start or stop the first processing; or the third indication information indicating that the first communication device controls the smart surface to adjust the first processing.

[0049] Based on the above technical solution, the second communication device can trigger the request or close the smart surface to carry additional information by adjusting part or all of the coefficients, or the second communication device can adjust the parameters of the first processing, thereby further increasing the flexibility of the system.

[0050] In combination with the second aspect, in some implementations of the second aspect, the third indication information is determined according to the quality of a third signal sent by the first communication device to the second communication device.

[0051] For the beneficial effects and possible designs of the second aspect, please refer to the relevant description in the first aspect, which will not be repeated here.

[0052] In a third aspect, a signal transmission method is provided, which can be executed by a second communication device. The communication device can be a terminal device, or can also be a chip or circuit for a terminal device, which is not limited in the present application. The following takes a terminal device as an example for description.

[0053] The method can include receiving a second signal, the second signal being obtained by a smart surface based on a first processing of a first signal, the first processing including adjusting part or all of the coefficients of the smart surface, the first signal being from a first communication device; and sending feedback information, the feedback information including a decoding result of the second communication device on the second signal; or the feedback information indicating the first communication device to control the smart surface to perform a first operation, the first operation including closing or not controlling part of the elements of the smart surface.

[0054] In combination with the third aspect, in some implementations of the third aspect, the coefficients include at least one of phase, amplitude or polarization.

[0055] In combination with the third aspect, in some implementations of the third aspect, the method can further include receiving second indication information, the second indication information indicating an order of the first processing.

[0056] In combination with the third aspect, in some implementations of the third aspect, the order of the first processing is 2, and the adjusting part or all of the coefficients of the smart surface includes negating part or all of the coefficients of the smart surface or coefficient retention.

[0057] In combination with the third aspect, in some implementations of the third aspect, the method can further include sending third indication information, the third indication information indicating the first communication device to control the smart surface to start or stop the first processing; or the third indication information indicating the first communication device to control the smart surface to adjust the first processing.

[0058] With reference to the third aspect, in some implementations of the third aspect, the third indication information is determined according to a quality of a third signal transmitted by the first communication apparatus to the second communication apparatus.

[0059] The advantages and possible designs of the third aspect can be refer to the descriptions of any of the first aspect to the third aspect, which will not be repeated here.

[0060] In a fourth aspect, a communication apparatus is provided, which can be a smart surface, or can also be a chip or circuit for a smart surface, which is not limited herein. The following takes a smart surface as an example for illustration.

[0061] The apparatus can include a transceiver, which can be configured to receive first indication information, the first indication information indicating that the smart surface performs first processing, the first processing including adjusting part or all of coefficients of the smart surface; the transceiver can also be configured to receive a first signal from a first communication apparatus; and the transceiver can also be configured to transmit a second signal to a second communication apparatus, the second signal being obtained by processing the first signal based on the first processing.

[0062] With reference to the fourth aspect, in some implementations of the fourth aspect, the coefficients include at least one of a phase, an amplitude, or a polarization.

[0063] With reference to the fourth aspect, in some implementations of the fourth aspect, the first indication information indicates a first set, the first set including an adjustment amount of the adjusting part or all of the coefficients of the smart surface.

[0064] With reference to the fourth aspect, in some implementations of the fourth aspect, the first indication information further indicates a base coefficient The The part or all of the coefficients of the smart surface before the first processing, the first processing including adjusting part or all of the coefficients of the smart surface, includes that the first processing includes adjusting part or all of the coefficients of the smart surface to The The element is selected from the first set according to a first rule.

[0065] With reference to the fourth aspect, in some implementations of the fourth aspect, the first rule indicates an order of selecting elements from the first set.

[0066] With reference to the fourth aspect, in some implementations of the fourth aspect, the first indication information further indicates a period and / or the first rule, the period representing a period of the adjusting part or all of the coefficients of the smart surface.

[0067] In some implementations of the fourth aspect, in combination with the fourth aspect, the first indication information indicates a time-varying function The time-varying function is The adjustment amount of the adjustment of the part or all of the coefficients of the intelligent surface at the time t0 is

[0068] In some implementations of the fourth aspect, in combination with the fourth aspect, the first indication information further indicates a base coefficient The base coefficient is The first processing includes adjusting the part or all of the coefficients of the intelligent surface, including: the first processing includes adjusting the part or all of the coefficients of the intelligent surface at the time t0 to

[0069] In some implementations of the fourth aspect, in combination with the fourth aspect, the transceiver can further be configured to receive second indication information, the second indication information indicating an order of the first processing.

[0070] In some implementations of the fourth aspect, in combination with the fourth aspect, the order of the first processing is 2, and the adjusting of the part or all of the coefficients of the intelligent surface includes: inverting the part or all of the coefficients of the intelligent surface or coefficient retention.

[0071] In some implementations of the fourth aspect, in combination with the fourth aspect, the transceiver can further be configured to send capability information of the intelligent surface, the capability information indicating a minimum period of the adjusting of the part or all of the coefficients of the intelligent surface.

[0072] In some implementations of the fourth aspect, in combination with the fourth aspect, the capability information includes a coefficient adjustment minimum time resolution or a minimum beam retention period.

[0073] A fifth aspect provides a communication apparatus, which can be a network device, or can also be a chip or circuit for a network device, and the present application does not limit this. The following takes a network device as an example for description.

[0074] The apparatus can include a transceiver, which can be configured to send first indication information, the first indication information indicating that an intelligent surface performs first processing, the first processing including adjusting part or all of the coefficients of the intelligent surface; and the transceiver can also be configured to send a first signal to the intelligent surface, the first signal being capable of obtaining a second signal based on the first processing, the second signal being capable of being sent by the intelligent surface to a second communication apparatus.

[0075] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the coefficient includes at least one of a phase, an amplitude, or a polarization.

[0076] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the first indication information indicates a first set, the adjustment amount of the adjustment of the part or all of the coefficients of the smart surface is included in the first set.

[0077] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the first indication information further indicates a base coefficient The For the part or all of the coefficients of the smart surface before the first processing, the first processing includes adjusting the part or all of the coefficients of the smart surface, including: the first processing includes adjusting the part or all of the coefficients of the smart surface to The Is an element selected from the first set according to a first rule.

[0078] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the first rule indicates an order of selecting elements from the first set.

[0079] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the first indication information further indicates a period and / or the first rule, the period representing a period of the adjustment of the part or all of the coefficients of the smart surface.

[0080] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the first indication information indicates a time-varying function The Indicates that the adjustment amount of the adjustment of the part or all of the coefficients of the smart surface at t0 is

[0081] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the first indication information further indicates a base coefficient The For the part or all of the coefficients of the smart surface before the first processing, the first processing includes adjusting the part or all of the coefficients of the smart surface, including: the first processing includes adjusting the part or all of the coefficients of the smart surface to

[0082] In some implementations of the fifth aspect, in conjunction with the fifth aspect, the transceiver can also be configured to send second indication information to the smart surface, the second indication information indicating an order of the first processing.

[0083] In some implementations of the fifth aspect, the order of the first processing is 2, and the adjusting the part or all of the coefficients of the intelligent surface comprises: inverting the part or all of the coefficients of the intelligent surface or keeping the coefficients.

[0084] In some implementations of the fifth aspect, the transceiver is further configured to send the second indication information to the second communication device.

[0085] In some implementations of the fifth aspect, the transceiver is further configured to receive capability information of the intelligent surface, the capability information indicating a minimum period of the adjusting the part or all of the coefficients of the intelligent surface.

[0086] In some implementations of the fifth aspect, the capability information comprises a minimum time resolution of coefficient adjustment or a minimum beam keeping period.

[0087] In some implementations of the fifth aspect, the transceiver is further configured to receive feedback information, the feedback information comprising a decoding result of the second signal by the second communication device, or the feedback information indicating that the first communication device controls the intelligent surface to perform a first operation, the first operation comprising turning off or not controlling part of the elements of the intelligent surface.

[0088] In some implementations of the fifth aspect, the transceiver is further configured to receive third indication information, the third indication information indicating that the first communication device controls the intelligent surface to start or stop the first processing, or the third indication information indicating that the first communication device controls the intelligent surface to adjust the first processing.

[0089] In some implementations of the fifth aspect, the third indication information is determined according to a quality of a third signal sent by the first communication device to the second communication device.

[0090] In a sixth aspect, a communication device is provided, which can be a terminal device, or can also be a chip or circuit for a terminal device, and the present application does not limit this. The following takes a terminal device as an example for description.

[0091] The apparatus can comprise: a transceiver, which can be configured to receive a second signal, the second signal being obtained by the intelligent surface based on a first processing on a first signal, the first processing comprising adjusting part or all of coefficients of the intelligent surface, the first signal being from a first communication apparatus; and the transceiver can be further configured to send feedback information, the feedback information comprising a decoding result of the second communication apparatus on the second signal; or the feedback information indicating the first communication apparatus to control the intelligent surface to perform a first operation, the first operation comprising turning off or not controlling part of the elements of the intelligent surface.

[0092] In combination with the sixth aspect, in some implementations of the sixth aspect, the coefficients comprise at least one of a phase, an amplitude, or a polarization.

[0093] In combination with the sixth aspect, in some implementations of the sixth aspect, the transceiver can be further configured to receive second indication information, the second indication information indicating an order of the first processing.

[0094] In combination with the sixth aspect, in some implementations of the sixth aspect, the order of the first processing is 2, and the adjusting part or all of the coefficients of the intelligent surface comprises: inverting part or all of the coefficients of the intelligent surface or keeping the coefficients.

[0095] In combination with the sixth aspect, in some implementations of the sixth aspect, the transceiver can be further configured to send third indication information, the third indication information indicating the first communication apparatus to control the intelligent surface to start or stop the first processing; or the third indication information indicating the first communication apparatus to control the intelligent surface to adjust the first processing.

[0096] In combination with the sixth aspect, in some implementations of the sixth aspect, the third indication information is determined according to a quality of a third signal sent by the first communication apparatus to the second communication apparatus.

[0097] A seventh aspect provides a communication apparatus, which is configured to perform the method in any of the first aspect to the third aspect and any possible implementation thereof. Specifically, the apparatus can comprise units and / or modules for performing the method in any of the first aspect to the third aspect and any possible implementation thereof, such as a processing unit and / or a communication unit.

[0098] In an implementation, the apparatus is a communication device (e.g., a terminal device, or a network device). When the apparatus is a communication device, the communication unit can be a transceiver, or an input / output interface; and the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0099] In another implementation, the apparatus is a chip, chip system or circuit or communication module for a communication device (e.g., a terminal device, or a network device). When the apparatus is a chip, chip system or circuit for a communication device, the communication unit can be an input / output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip, chip system or circuit, etc.; and the processing unit can be at least one processor, processing circuit or logic circuit, etc.

[0100] In an eighth aspect, a communication apparatus is provided, which comprises at least one processor configured to cause the apparatus to perform the method in any one of the first aspect to the third aspect and any possible implementation thereof.

[0101] Optionally, the at least one processor is configured to execute computer programs or instructions to perform the method in any one of the first aspect to the third aspect and any possible implementation thereof.

[0102] Optionally, the apparatus further comprises a memory configured to store the computer programs or instructions.

[0103] Optionally, the at least one processor is coupled to the memory configured to store the computer programs or instructions. The memory can be disposed outside the apparatus.

[0104] Optionally, the apparatus further comprises a communication interface through which the processor reads the instructions on the memory. It can be understood that the communication interface is coupled to the processor, and can be used to input the computer programs or instructions to the processor, or output the information in the processor.

[0105] For the operations of sending and acquiring / receiving, etc. involved, if no special description is made, or if it is not contrary to the actual role or inherent logic in the related description, it can be understood as output, input, etc. operations, or as sending and receiving operations performed by the radio frequency circuit and the antenna, which are not limited in the present application.

[0106] In an implementation, the apparatus is a communication device (e.g., a terminal device, or a network device).

[0107] In another implementation, the apparatus is a chip, chip system or circuit or communication module for a communication device (e.g., a terminal device, or a network device). Optionally, the chip is a Modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core.

[0108] In a ninth aspect, a computer-readable storage medium is provided, and the computer-readable medium stores a computer program (e.g., program code) or instructions thereon, which, when executed on a communication apparatus, cause the communication apparatus to perform the method in any one of the first aspect to the third aspect and any possible implementation thereof.

[0109] In a tenth aspect, a computer program product is provided, and the computer program product, when executed on a computer, causes the computer to perform the method in any one of the first aspect to the third aspect and any possible implementation thereof.

[0110] In an eleventh aspect, a communication system is provided, and the communication system includes a smart surface (e.g., RIS), a first communication apparatus, and a second communication apparatus. The smart surface (e.g., RIS) is configured to perform the method provided in any one of the implementations of the first aspect, the first communication apparatus is configured to perform the method provided in any one of the implementations of the second aspect, and the second communication apparatus is configured to perform the method provided in any one of the implementations of the third aspect. BRIEF DESCRIPTION OF DRAWINGS

[0111] FIG. 1 is a schematic diagram of a wireless communication system suitable for embodiments of the present application.

[0112] FIG. 2 is a schematic diagram of a method 200 of signal transmission according to an embodiment of the present application.

[0113] FIG. 3 is a simulation diagram of adjusting a smart surface coefficient according to an embodiment of the present application.

[0114] FIG. 4 is a schematic diagram of another method 400 of signal transmission according to an embodiment of the present application.

[0115] FIG. 5 is a schematic diagram of reporting a smart surface state anomaly according to an embodiment of the present application.

[0116] FIG. 6 is a schematic diagram of a communication apparatus 600 according to an embodiment of the present application.

[0117] FIG. 7 is a schematic diagram of another communication apparatus 700 according to an embodiment of the present application.

[0118] FIG. 8 is a schematic diagram of a chip system 800 according to an embodiment of the present application. DETAILED DESCRIPTION

[0119] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0120] Before introducing the solutions of the present application, the following points are explained.

[0121] (1) In this application, "indication" can include direct indication, indirect indication, explicit indication, implicit indication, etc. When describing that certain indication information indicates A, it can be understood that the indication information carries A, carries an identifier of A, carries B having an association relationship with A, carries an identifier of B having an association relationship with A, etc. In other words, if the receiving side of certain indication information can determine A according to the indication information, it can be described that the indication information indicates A, and the specific determination is not limited. When it is understood that the indication information carries A, "indication" can be replaced by "includes", at this time, similar to the expression "sending / receiving indication information, the indication information indicates A", it can be replaced by "sending / receiving A".

[0122] In this application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, wherein the other information has an association relationship with the to-be-indicated information. The to-be-indicated information can also be only indicated a part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be realized by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending time of these sub-information can be the same or different.

[0123] (2) In this application, the expression " / " is used to represent that the objects before and after the association are in an "or" relationship; for example, A / B can represent A or B. The expression "and / or" is used to represent that the objects before and after the association can be in an "and" association relationship or an "or" association relationship; for example, A and / or B can represent the following cases: A exists alone, B exists alone, A and B exist together, wherein A and B can be single or multiple. "At least one of the following" or similar expressions are used to represent any combination of the listed items; for example, at least one of A, B and (or) C can represent the following cases: A exists alone, B exists alone, C exists alone, A and B exist together, B and C exist together, A and C exist together, A, B and C exist together, wherein A, B and C can be single or multiple.

[0124] (3) In the present application, “sending” and “receiving” represent the direction of signal transmission. For example, “sending information to XX” can be understood as that the destination of the information is XX, which can include direct transmission through the air interface, or indirect transmission through the air interface by other units or modules. “Receiving information from YY” can be understood as that the source of the information is YY, which can include direct reception from YY through the air interface, or indirect reception from YY through the air interface by other units or modules. “Sending” can also be understood as the “output” of the chip interface, and “receiving” can also be understood as the “input” of the chip interface. In other words, sending and receiving can be carried out between devices, such as between network devices and terminal devices, or can be carried out within a device, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0125] (4) In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0126] (5) In the present application, “first”, “second” are only convenient for description, used to distinguish objects, and do not limit the scope of the embodiments of the present application. They are not used to describe the order or sequence of features. It should be understood that the objects thus described can be interchanged under appropriate circumstances to describe solutions other than the embodiments of the present application.

[0127] (6) In the present application, “predefined” can mean standard protocol predefined, or can also mean pre-agreed or pre-negotiated between devices. Among them, “protocol” can refer to standard protocols in the field of communication, which can include fourth generation (4 th generation, 5 th generation, new radio (NR) protocol, 5.5G network protocol, future communication network protocol and related protocols applied in future communication systems, which are not limited in the present application.

[0128] (7) In this application, the words "example", "such as", and the like are used for illustrative purposes, and any embodiment or design described as "example" in this application should not be interpreted as more preferred or having more advantages than other embodiments or design solutions. Rather, the word "example" is used to present the concept in a specific manner. In this application, "of", "corresponding" and "corresponding" are sometimes mixed. It should be pointed out that when there is no emphasis on their differences, the meanings they express are consistent.

[0129] The technical solutions in this application will be described below in conjunction with the drawings.

[0130] The technical solutions provided in this application can be applied to various communication systems, such as: 5th generation (5G) or new radio (NR) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, etc. The technical solutions provided in this application can also be applied to future communication systems, such as future communication networks. The technical solutions provided in this application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication system. The technical solutions provided in this application can also be applied to low frequency scenarios, high frequency scenarios, terahertz, optical communication, licensed frequency bands, and can also be used in unlicensed frequency bands, etc. The technical solutions provided in this application can also be applied to inter-satellite communication and satellite communication, and other non-terrestrial communication network (NTN) systems. As an example, the satellite communication system includes a satellite base station and a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with the base station. The satellite can act as a base station, and also as a terminal device. Among them, the satellite can refer to unmanned aerial vehicles, hot air balloons, low-orbit satellites, medium-orbit satellites, high-orbit satellites, etc. The satellite can also refer to non-ground base stations or non-ground devices, etc.

[0131] A device in a communication system can send or receive signals to or from another device. The signals can include information, signaling, or data, etc. The device can also be replaced by an entity, a network entity, a network element, a communication device, a communication module, a node, a communication node, etc. The device is taken as an example for description in the disclosure. For example, the communication system can include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device.

[0132] The terminal device in the embodiments of the present application includes various devices with wireless communication functions, which can be used to connect people, things, machines, etc. The terminal device can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer to peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, remote medical treatment, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city UAV, robot, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device can be a user equipment (UE) of the 3rd generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a SIP phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handset, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quad-copter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, or a device built-in in the above devices (such as a communication module, a modem or a chip in the above devices, etc.), or other processing devices connected to the wireless modem. For the convenience of description, the terminal device will be described as a terminal or a UE hereinafter.

[0133] It should be understood that in certain scenarios, a UE can also be used to act as a base station. For example, a UE can act as a scheduling entity providing sidelink signals between UEs in V2X, D2D, or P2P, etc. scenarios.

[0134] In the embodiments of the present application, the device for realizing the function of the terminal device, i.e., the terminal device, can be a terminal device or a device capable of supporting the terminal device to realize the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0135] The network device in the embodiments of the present application can be a device for communicating with a terminal device, and the network device can also be referred to as an access network device or a radio access network device, for example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmission point, primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. In a possible design, the processing unit in the BBU for implementing baseband functions is referred to as a base band high (BBH) unit, and the processing unit in the RRU / AAU / RRH for implementing baseband functions is referred to as a base band low (BBL) unit. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip for being arranged in the foregoing device or apparatus. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a future communication network, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0136] In some deployments, the network device mentioned in embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)) and a DU node. For example, the network device can include a gNB-CU-CP, a gNB-CU-UP and a gNB-DU.

[0137] In some deployments, wireless access is assisted for a terminal by cooperation of multiple RAN nodes, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a CU, a DU, a CU-CP, a CU-UP, or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can also be included in the same network element, for example, in a BBU. The RU can be included in a radio frequency device or a radio frequency unit, for example, included in an RRU, an AAU or an RRH.

[0138] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, the radio access network can also be an open radio access network (O-RAN) architecture, in which the CU in the ORAN system can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CU (or CU-CP, CU-UP), DU and RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0139] The base station can be fixed, or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to act as a device that communicates with another base station.

[0140] In an embodiment of the present application, the apparatus for implementing the function of the network device can be a network device, or can be an apparatus capable of supporting the network device to implement the function, for example, a chip system or a chip, which can be installed in the network device. In an embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the embodiments of the present application, only the apparatus for implementing the function of the network device is taken as an example of the network device, and the scheme of the embodiments of the present application is not limited.

[0141] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water; and can also be deployed on aircraft, balloons and satellites in the air. The scenario in which the network device and the terminal device are located is not limited in the embodiments of the present application. In addition, the terminal device and the network device can be hardware devices, or software functions running on special-purpose hardware, software functions running on general-purpose hardware, such as virtualized functions instantiated on a platform (for example, a cloud platform), or entities including special-purpose or general-purpose hardware devices and software functions. The specific form of the terminal device and the network device is not limited in the present application.

[0142] First, a communication system suitable for the embodiments of the present application is briefly introduced as follows.

[0143] Referring to FIG. 1, FIG. 1 is a schematic diagram of a wireless communication system suitable for the embodiments of the present application.

[0144] As shown in FIG. 1, the wireless communication system includes at least one network device, for example, the network device 110 shown in FIG. 1, and can also include at least one terminal device, for example, the terminal device 120 shown in FIG. 1. The network device and the terminal device can each be configured with multiple antennas, and the network device and the terminal device can communicate using multi-antenna technology.

[0145] As shown in FIG. 1, the wireless communication system further includes a reconfigurable intelligent surface (RIS) 130. The RIS can be used to assist communication between devices, such as between the network device and the terminal device. For example, if the sending end (such as the network device, or the terminal device) and the receiving end (such as the network device, or the terminal device) cannot directly communicate, or the signal is weak when directly communicating, such as when there is an obstacle between the sending end and the receiving end, the RIS can be used to implement communication.

[0146] RIS, which can be referred to as a RIS device, can also be referred to as an intelligent reflective surface (IRS) or a large intelligent surface (LIS). The RIS is a sub-wavelength two-dimensional artificial material, which is usually composed of metals, dielectrics and adjustable elements, and can be equivalently characterized as a radio link control (RLC) circuit. By adjusting the physical properties of the electromagnetic unit, such as the capacitive reactance, impedance or inductive reactance, the radiation characteristics of the RIS are changed, and very unconventional physical phenomena such as irregular reflection, negative refraction, wave absorption, focusing and polarization conversion can be achieved, thereby dynamically regulating electromagnetic waves. The RIS can generate the required electromagnetic behavior of each electromagnetic unit by controlling the bias voltage of the variable capacitance diode, PIN switch, micro electro mechanical systems (MEMS) switch, liquid crystal, graphene, etc.

[0147] The RIS can be considered as a reflective panel, which behaves as an intelligent panel including a plurality of antenna elements 131 (referred to as elements for short). Each element can act as a passive reflector, and by flexibly configuring the parameters (such as amplitude and / or phase) of each element, the wireless channel fading can be controlled, and the desired directional beam can be formed. The elements of the RIS described below refer to the elements on the RIS, or the elements in the RIS.

[0148] The RIS can be installed in various environments, such as the RIS installed on a large plane (such as a wall or a ceiling in a room, a building or a sign outside), so as to reflect radio frequency (RF) energy around obstacles and create a virtual line of sight (LoS) propagation path between a communication source and a target. For example, the advantages of the RIS can include the following aspects.

[0149] 1) Spectrum efficiency enhancement: The RIS can further improve the communication quality of the wireless link by intelligently controlling the elements, enhance the strength of the useful signal at the receiving end, reduce the strength of the channel interference, and provide a breakthrough point for the implementation of the future overall intelligent network.

[0150] 2) Reduce energy consumption and device complexity: The RIS can passively reflect the received signal, and at the RIS end, there is no need to configure the transmitting and receiving units, and there is no need to encode and decode the data, so the complexity of the actual hardware device of the RIS can be greatly reduced compared with the network device and the terminal device, thereby achieving the purpose of reducing the system energy consumption of the wireless network.

[0151] 3) Easy to deploy: since only passive reflecting electromagnetic devices are included, RIS can be easily deployed on various surfaces of buildings, indoor walls, platforms, roadside billboards, highway signs, vehicle windows, etc. And RIS can be removed or redeployed at any time according to the needs of the network.

[0152] 4) Compatibility: RIS can be considered as a complementary device of the existing network, so it will not affect the existing protocol and does not need to change the existing device, and has compatibility.

[0153] 5) Full duplex: compared with the relay system running in half duplex mode, RIS can only passively reflect, so it can run in full duplex mode, thereby improving the spectrum efficiency.

[0154] The above description of RIS is only an example, and the embodiments of the present application are not limited thereto. In addition, in the following embodiments, RIS is mainly taken as an example for description, but any device or apparatus capable of realizing the function of RIS is applicable to the embodiments of the present application. In addition, in the following embodiments, RIS transmitting signal is mainly taken as an example for description, and it can be understood that RIS transmitting signal can be replaced by RIS reflecting signal or RIS forwarding signal.

[0155] In addition, FIG. 1 is only a schematic diagram, and the wireless communication system can further include other devices, such as core network devices, wireless relay devices and / or wireless backhaul devices, and a larger number of network devices, terminal devices, etc., which are not shown in FIG. 1.

[0156] In order to better understand the technical solutions of the present application, some related technologies involved in the technical solutions of the present application are introduced.

[0157] 1, Signal: indicates symbols, data or messages transmitted through a certain medium (such as electromagnetic waves, light waves, sound waves, etc.), which can be decoded and understood by the receiving end. The signal can be an analog signal or a digital signal, etc.

[0158] As an example, reference signal (RS): also known as pilot, reference sequence, reference signal, etc. For the sake of unity, the reference signal is described below. The reference signal refers to a physical signal carrying a sequence for a specific function. Specifically, the reference signal is a physical signal generated by mapping a specific sequence to the corresponding resource according to the pre-designed resource mapping method.

[0159] In a multiple input multiple output (MIMO) system, each transmit antenna (virtual antenna or physical antenna) has an independent data channel. Based on a pre-known reference signal, the receiving end performs channel estimation for each transmit antenna, and restores the transmitted data based on this. Channel estimation refers to the process of reconstructing the received signal to compensate for channel fading and noise, using a pre-known reference signal between the transmitting end and the receiving end to track the time-domain and frequency-domain changes of the channel.

[0160] In this application, the reference signal involved can be any of the following as an example: channel state information reference signal (CSI-RS), sounding reference signal (SRS), demodulation reference signal (DMRS), phase tracking reference signal (PT-RS), cell reference signal (CRS), etc. Among them, the DMRS can be used for demodulation of the physical downlink shared channel (PDSCH) or the physical uplink shared channel (PUSCH). The CSI-RS can be used for channel information measurement and implementation of reporting of channel state information (CSI), which includes at least one of the following: precoding matrix indicator (PMI), rank indication (RI), and channel quality indicator (CQI).

[0161] It should be understood that the reference signals listed above are only examples and should not constitute any limitation on this application. This application does not exclude the possibility of defining other reference signals in future protocols to achieve the same or similar functions.

[0162] 2、Beam: a kind of communication resource. Different beams can be considered as different resources. The same information or different information can be transmitted through different beams.

[0163] The beam in the NR protocol can be a spatial domain filter, or a spatial filter or a spatial parameter. The beam for transmitting a signal can be referred to as a transmission beam (Tx beam), and the beam for receiving a signal can be referred to as a reception beam (Rx beam).

[0164] The transmission beam can refer to a distribution of signal strength in different spatial directions after a signal is transmitted by an antenna, and the reception beam can refer to a distribution of signal strength in different spatial directions of a wireless signal received by an antenna.

[0165] In addition, the beam can be a wide beam, or a narrow beam, or other types of beams. The beam forming technology can be a beam forming technology or other technology. The beam forming technology can be a digital beam forming technology, an analog beam forming technology, or a hybrid digital / analog beam forming technology, etc.

[0166] As an example, multiple beams with the same or similar communication characteristics can be considered as one beam.

[0167] One beam can correspond to one or more antenna ports for transmitting data channels, control channels, and sounding signals, etc. One or more antenna ports corresponding to one beam can also be regarded as an antenna port set.

[0168] 3. RIS channel estimation: Since RIS is generally considered as a passive reflector, and in a MIMO system, the number of RIS array elements is usually large (such as thousands), directly estimating the RIS channel matrix itself requires a number of pilots on the order of the number of RIS array elements, and the overhead is a bottleneck. In addition, since RIS does not have RF chains for active transmission and reception, it cannot transmit and receive and process signals, which makes it impossible to obtain channel state information using traditional channel estimation methods; and with the increase in the number of reflection elements, the sharp increase in channel dimension also increases the difficulty of obtaining channel state information.

[0169] Without loss of generality, assuming that the network device has M antennas, the RIS has N array elements (or element arrays), and the terminal device is a single antenna, the signal received by the network device (after removing the reference signal) can satisfy equation 1.

[0170] where FH is the channel between the network device and the RIS (such as BS-RIS channel for short), diag(W) is the weight of the RIS, H is the channel between the RIS and the terminal device (such as RIS-UE channel for short), and HBS-UE For the channel between the network device and the terminal device (such as BS-UE channel for short). The embodiments of the present application mainly concern the estimation of the cascaded channel between the network device, the RIS, and the terminal device (such as BS-RIS-UE channel for short). For example, the estimation of the uplink cascaded channel and the downlink cascaded channel is realized by transmitting the uplink reference signal or the downlink reference signal, and then the operations such as precoding, modulation order, and rank number setting can be performed.

[0171] 4. RIS precoding / beamforming: similar to the function of the precoding technology in the traditional multiple user MIMO (MU-MIMO) system, the precoding can realize the reasonable utilization of the channel state information, and the transmission signal is preprocessed to improve the reception performance. For example, by adjusting the parameters (such as phase and / or amplitude) of each electromagnetic unit of the RIS, the beam can be adjusted to be transmitted in a specific direction, thereby reducing the transmission power of the required signal, improving the spectrum efficiency, expanding the coverage range, and weakening the interference at the same time.

[0172] The beamforming design mainly includes the design of the precoding and equalization matrix of the multi-antenna transceiver, and realizes the directional transmission of the signal. The introduction of the RIS makes the beamforming design of the system more complex. Based on the programmable characteristics of the RIS, the RIS can be used as an external analog precoder to design the corresponding phase shift matrix, that is, the RIS uses analog beamforming to reflect and control the signal from the transmitter.

[0173] 5. RIS communication enhancement application scenarios: including coverage enhancement and blind area compensation. For example, one or more RISs are deployed at the edge of the cell or in the coverage blind area caused by shielding or deep fading, which can extend the coverage range and compensate for the blind area.

[0174] Another potential application scenario of the RIS is rank enhancement. Based on the RIS, the channel can be actively changed, and more gain-controllable transmission paths can be provided. The network device can actively control the wireless channel quality between the network device and the UE (such as enhancing the link gain and improving the number of characteristic sub-channels) by using the RIS. The RIS improves the communication rank and becomes a possible application scenario. Especially in the centimeter wave frequency (such as 10 GHz), the RIS-MIMO system has lower loss and more scattering than high frequency. In addition to the coverage enhancement function, the rank enhancement may be one of the main features of the centimeter wave RIS-MIMO system. RIS MU-MIMO will be a design angle that needs to be considered in the centimeter wave RIS-MIMO system. RIS MU-MIMO means that the RIS simultaneously serves multiple users, in other words, the RIS simultaneously transmits signals to multiple users.

[0175] 6、RIS communication enhancement other application scenarios: RIS can be widely deployed in the existing network based on its low cost, low power consumption, easy deployment characteristics. And the sensing information in the integrated sensing, such as positioning enhancement, environmental information, sensing information and other small packet information transmission, and the state information monitoring of RIS itself can also be realized by means of the wide deployment of RIS. For example, RIS can be used to transmit signals according to certain rules, which can be reflected in the coefficient adjustment of RIS, such as the phase control signal of RIS. The rules can be used to carry certain information to realize the reporting or monitoring of RIS hardware exception information.

[0176] In a possible implementation, RIS can assist in information transmission between network devices and terminals in wireless communication, and at this time the working mechanism of RIS is to realize the reflection / transmission enhancement of communication signals or main signals between network devices and terminal devices based on beam control, in order to realize the effects of coverage enhancement and flow transmission of main signals. At this time, the channel between the network device and the terminal device can satisfy formula 2.

[0177] Wherein, H0 is the channel without RIS, R is the channel between the network device and the RIS, G is the channel between the RIS and the terminal device, is the coefficient matrix of RIS. It can be seen that RIS can realize the introduction of other channel components.

[0178] In the above implementation, RIS mainly focuses on assisting the information transmission between network devices and terminal devices, but does not fully utilize the electromagnetic wave modulation information of RIS itself for additional function expansion. For example, small packet data such as environmental information, sensing information, and RIS state information can be carried by electromagnetic wave modulation of RIS. On the other hand, in the communication system or integrated sensing system, the transmission of some information is important, and the transmission of environmental information, sensing information, high-precision positioning, and RIS hardware state monitoring information needs to occupy additional transmission resources.

[0179] Therefore, the present application proposes that the coefficients of part or all of the intelligent surface can be adjusted to make the signals transmitted by the intelligent surface to the terminal device carry additional information.

[0180] The method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments provided by the present application can be applied to the scene shown in the above-mentioned figure, without limitation.

[0181] Referring to FIG. 2, as an example, FIG. 2 is a schematic diagram of a signal transmission method 200 provided by an embodiment of the present application. The method 200 shown in FIG. 2 can include the following steps. In the following embodiments, RIS is mainly taken as an example for description, but any device or apparatus capable of realizing the function of RIS is applicable to the embodiments of the present application.

[0182] 210. The first communication device transmits first indication information, and the intelligent surface receives the first indication information accordingly.

[0183] The first indication information indicates that the intelligent surface performs first processing, and the first processing includes adjusting part or all of the coefficients of the intelligent surface.

[0184] As an example, the first communication device is a network device or a component (such as a chip or a circuit) of the network device, or the first communication device is a terminal device or a component (such as a chip or a circuit) of the terminal device. In the following embodiments, for ease of description, the first communication device is mainly taken as an example of a network device.

[0185] The intelligent surface represents a device capable of transmitting or reflecting signals. As an example, the intelligent surface can be used to transmit or reflect signals to a terminal device or a network device, and the intelligent surface can control the wireless channel fading and form the desired directional beam by flexibly configuring the coefficients of each array. The intelligent surface can also be referred to as RIS, IRS, or LIS, and the naming does not limit the protection scope of the embodiments of the present application.

[0186] Optionally, the coefficients of each array in the intelligent surface can include at least one of a phase, an amplitude, or a polarization.

[0187] The first indication information can also be referred to as intelligent surface coefficient rotation information, rotation information, or intelligent surface configuration information, and the naming does not limit the protection scope of the embodiments of the present application.

[0188] As described above, the first processing can include adjusting part or all of the coefficients of the intelligent surface. In the following embodiments, for ease of description, the coefficients are mainly taken as an example of a phase, that is, the first processing is taken as an example of adjusting part or all of the phases of the intelligent surface.

[0189] For example, the initial phase of the array on the intelligent surface (that is, the initial phase of each array in the intelligent surface, or the initial phase matrix) can be represented as As an example, may be represented as:

[0190] It should be noted that the initial phase may also be referred to as a basic phase, and the naming does not limit the protection scope of the embodiments of the present application.

[0191] Further, in the case of keeping the initial phase unchanged, the phase the phase of each element in the smart surface, for example, the changed phase may be satisfied

[0192] wherein, represents the adjustment amount of adjusting part or all of the phases of the smart surface.

[0193] At this time, the beam direction of the signal emitted by the smart surface does not change, or in other words, the overall phase rotation of the smart surface does not affect the direction and intensity of the reflected beam of the smart surface, or in other words, adjusting all the phases of the smart surface does not affect the direction and intensity of the reflected beam of the smart surface, or in other words, adjusting all the phases of the smart surface has little (or negligible) effect on the direction and intensity of the reflected beam of the smart surface.

[0194] It should be noted that part of the elements of the smart surface may be closed or not enabled, at this time, it can also be said that the phase rotation of part of the smart surface does not affect the direction and intensity of the reflected beam of the smart surface, or in other words, adjusting part of the phase of the smart surface does not affect the direction and intensity of the reflected beam of the smart surface.

[0195] Referring to FIG. 3, FIG. 3 is a RIS directivity diagram simulation diagram for adjusting the coefficient of the smart surface according to an embodiment of the present application. In the simulation diagram shown in FIG. 3, the horizontal axis can represent the beam angle, and the unit is °, and the vertical axis can represent the beam intensity (represented by beam power), and the unit is dB. Among them, curve 2 can represent the beam state after adjusting part or all of the phases of the smart surface under the condition of keeping the initial state (its beam state is as shown in curve 1) unchanged. As can be seen, the beam shown by curve 2 is similar to the beam shown by curve 1 in beam direction and intensity, but the overall phase of the beam is modulated. Therefore, the smart surface can modulate part of the information on the signal it transmits by using the law of phase rotation.

[0196] As an example, the information modulated by the smart surface based on adjusting part or all of its coefficients can include at least one of the following information: state information of the smart surface, environmental information, or sensing information, etc. The modulated information can also be called auxiliary information, and the naming does not limit the protection scope of the embodiments of the present application.

[0197] In the embodiments of the present application, after adjusting part or all of the coefficients of the intelligent surface, the beam direction and intensity of the signal sent by the intelligent surface to the second communication device are not changed, and meanwhile, based on the adjustment of part or all of the coefficients of the intelligent surface, the signal sent by the intelligent surface can carry additional information, so that low-rate data modulation and transmission can be realized. For example, the additional information can be used for intelligent surface state detection, or the additional information can be used to deliver environmental information or sensing information of the intelligent surface, etc., thereby providing a new path for intelligent surface application.

[0198] In the following, the manner in which the first indication information instructs the intelligent surface to perform the first processing is illustrated by way of example 1 and example 2.

[0199] In example 1, the first indication information indicates a first set.

[0200] As an example, the first set includes an adjustment amount for adjusting part or all of the coefficients of the intelligent surface. The first set can also be referred to as a rotation coefficient set, a rotation coefficient vector, or an adjustment coefficient vector, etc., and the naming does not limit the protection scope of the embodiments of the present application.

[0201] Optionally, the first set includes N adjustment amounts for adjusting part or all of the coefficients of the intelligent surface, and N is an integer greater than 1 or equal to 1.

[0202] Optionally, the adjustment amount can include a phase adjustment amount.

[0203] For example, the adjustment amount can include an adjustment amount for uniformly changing the phase of each element in the aforementioned

[0204] In the embodiments of the present application, the adjustment amount for adjusting part or all of the coefficients of the intelligent surface can be selected from the first set, thereby reducing the complexity of the operation of the intelligent surface for implementing coefficient adjustment.

[0205] Optionally, the first indication information further indicates the base coefficient before the first processing.

[0206] Optionally, the first communication device sends indication information #A, and correspondingly, the intelligent surface receives the indication information #A, and the indication information #A indicates the base coefficient The indication information #A is different from the first indication information.

[0207] ​​It should be noted that the indication information #A can be sent before or after the first indication information, the indication information #A can be sent at the same time as the first indication information, and the application embodiment does not limit the sending order of the indication information #A and the first indication information.

[0208] As a possible implementation, the first processing can include adjusting part or all of the coefficients of the smart surface to is an element selected from the first set according to the first rule.

[0209] Optionally, the first processing can include adjusting part or all of the coefficients of the smart surface to

[0210] The first rule can indicate the order of selecting the element from the first set.

[0211] For example, the elements in the first set include 1, 0.5 and -1, and the first rule can indicate that the order of selecting the element from the first set by the smart surface is 1, -1, 0.5, that is, in the case of the base coefficient being , the smart surface adjusts its coefficients to and

[0212] Optionally, the first indication information further indicates a period and / or the first rule, and the period represents a period of adjusting part or all of the coefficients of the smart surface. In the following embodiments, for the convenience of description, the period of adjusting part or all of the coefficients of the smart surface is recorded as period #A.

[0213] As an example, the period #A and / or the first rule can be configured by the coefficient modulation time window information.

[0214] Optionally, the first communication device sends indication information #B, and correspondingly, the smart surface receives the indication information #B, the indication information #B indicates the period #A and / or the first rule, and the indication information #B is different from the first indication information.

[0215] It should be noted that the indication information #B can be sent before or after the first indication information, the indication information #B can be sent at the same time as the first indication information, and the application embodiment does not limit the sending order of the indication information #B and the first indication information.

[0216] Optionally, the period #A and / or the first rule can be preset or protocol predefined, and the application embodiment does not limit this. In this case, it is an optional step to indicate the period #A and / or the first rule by the first indication information or the indication information #B.

[0217] Optionally, the starting point of the default time window information for the smart surface is the base coefficient. The configuration time, or in other words, the starting point of the time window information is the sending time of the first indication information or indication information #A, or in other words, the starting point of the time window information is the receiving time of the first indication information or indication information #A.

[0218] As an example, the coefficient modulation time window information depends on the relative positions of network devices, terminal devices, and smart surfaces, or whether the smart surface coefficients change. In other words, the coefficient modulation time window is based on the base coefficients. The design is based on whether changes will occur.

[0219] For example, when the relative positions of network devices, terminal devices, and smart surfaces change, a base coefficient needs to be indicated to the smart surface first. Next, configure the coefficient modulation time window information.

[0220] Method 2, the first indication information indicates the time-varying function

[0221] in, The adjustment amount that indicates the adjustment of some or all of the coefficients of the smart surface at time t0 is:

[0222] Optionally, the aforementioned adjustment amount may include a phase adjustment amount.

[0223] For example, the aforementioned adjustments may include the uniform changes described above. The phase adjustment amount of each element in the equation, i.e. In

[0224] As an example, the smart surface can calculate the adjustment amount at different times t0. And based on For the base coefficient After adjustments, the data is loaded / applied to the array. In other words, the first indicator information indicates the time-varying function. Then, the smart surface can automatically determine the coefficient adjustment amount at a certain moment.

[0225] In this embodiment, the adjustment amount for adjusting some or all of the coefficients of the smart surface can be determined based on a time-varying function. For example, the time-varying function can be used to generate the same beam information by traversing different coefficients of the smart surface, which helps to maintain the beamforming performance of the system even when facing partial component failure or coefficient adjustment errors. This can improve the robustness of the smart surface when carrying additional information by adjusting some or all of the coefficients.

[0226] Optionally, the first indication information further indicates the base coefficient The first processing is performed on the part or all of the coefficients of the first intelligent surface.

[0227] Optionally, the first communication device sends indication information #A, and correspondingly, the intelligent surface receives the indication information #A, and the indication information #A indicates the base coefficient The indication information #A is different from the first indication information.

[0228] It should be noted that the indication information #A can be sent before or after the first indication information, and the indication information #A can be sent at the same time as the first indication information. The application embodiment does not limit the sending order of the indication information #A and the first indication information.

[0229] As a possible implementation manner, the first processing includes adjusting the part or all of the coefficients of the intelligent surface to

[0230] Optionally, the first processing includes adjusting the part or all of the coefficients of the intelligent surface to

[0231] Optionally, the time t0=0 is the configuration time of the base coefficient , or the sending time of the first indication information or the indication information #A, or the receiving time of the first indication information or the indication information #A.

[0232] As an example, the coefficient modulation time window information is determined according to the relative position between the network device, the terminal device and the intelligent surface, or whether the coefficient of the intelligent surface changes, or the coefficient modulation time window is designed based on whether the base coefficient changes.

[0233] For example, when the relative position of the network device, the terminal device and the intelligent surface changes, the base coefficient needs to be indicated to the intelligent surface first, and then the coefficient modulation time window information is configured.

[0234] 220, the first communication device sends a first signal to the intelligent surface, and correspondingly, the intelligent surface receives the first signal from the first communication device.

[0235] 230, the intelligent surface sends a second signal to the second communication device, and correspondingly, the second communication device receives the second signal, and the second signal is obtained by processing the first signal based on the first processing. In other words, the first signal can obtain the second signal based on the first processing, and the second signal can be sent by the intelligent surface to the second communication device.

[0236] As an example, the first signal and / or the second signal can be any of the following: data, a message, or a reference signal. The description of the signal can refer to the description of the foregoing term explanation section, which is not repeated here.

[0237] As an example, the first signal and / or the second signal can be used to assist the information transmission between the first communication device and the second communication device, and the first signal and / or the second signal can also be referred to as main information, and the naming does not limit the embodiments of the present application.

[0238] As an example, the second communication device is a terminal device or a component (for example, a chip or a circuit) of a terminal device, or the second communication device is a network device or a component (for example, a chip or a circuit) of a network device. In the following embodiments, the first communication device is mainly taken as a terminal device for description.

[0239] As an example, the second signal can be a signal obtained by processing the first signal according to the adjustment of part or all of the coefficients of the intelligent surface according to the first indication information.

[0240] Referring to FIG. 4, FIG. 4 is a schematic diagram of another method 400 of signal transmission provided by an embodiment of the present application. The method 400 includes steps 430, 450 and 460. Optionally, the method 400 further includes steps 410, 420, 440 and 470.

[0241] 410, the intelligent surface sends the capability information of the intelligent surface, and correspondingly, the first communication device receives the capability information of the intelligent surface. The capability information indicates a minimum period of adjusting part or all of the coefficients of the intelligent surface.

[0242] The description of the intelligent surface and the first communication device can refer to the method 200, which is not repeated here.

[0243] As an example, the capability information can be used to report the coefficient time-varying characteristic or the time-domain adjustment resolution capability of the intelligent surface, which can be specifically a phase time-varying characteristic.

[0244] As a possible implementation manner, the capability information includes a coefficient adjustment minimum time resolution or a minimum beam maintenance period.

[0245] Optionally, the capability information can also be used to report information such as a quantization order, a maximum incident and exit angle range, a maximum beam resolution, or a maximum beam number.

[0246] As an example, the minimum period of adjusting part or all of the coefficients of the intelligent surface can also be referred to as an intelligent surface coefficient time-varying minimum granularity or a time-domain adjustment resolution, and the minimum period can be represented as T1.

[0247] As an example, T1 can be much smaller than a main information reflection phase modulation period T0. Wherein, T0 can be a beam update period between the network device and the terminal device caused by the terminal device moving based on the terminal device moving.

[0248] Specifically, in combination with the method 200 described above, the maximum number of bits of the auxiliary information modulated by the first processing of the intelligent surface can be:

[0249] In the embodiments of the present application, the intelligent surface can report a minimum period for adjusting part or all of its coefficients. The minimum period can be associated with the maximum number of bits of information that the intelligent surface can carry based on the adjustment of part or all of its coefficients, thereby helping to determine the modulation order and other parameters of the first processing of the intelligent surface.

[0250] Optionally, the method 400 can further include step 420.

[0251] 420, the second communication device sends third indication information, and accordingly, the first communication device receives the third indication information.

[0252] Wherein, the third indication information indicates that the first communication device controls the intelligent surface to start or stop the first processing; or the third indication information indicates that the first communication device controls the intelligent surface to adjust the first processing.

[0253] For specific operations of the first processing, please refer to the method 200 described above, and the embodiments of the present application will not be repeated here.

[0254] Optionally, the third indication information is determined according to the quality of the third signal sent by the first communication device to the second communication device. Wherein, the quality of the third signal can include signal-to-noise ratio, interference or error code characteristic change, etc.

[0255] As an example, the third signal can be the main information described above.

[0256] As one possible case, the second communication device requests to monitor the state information, environmental information or perception information of the intelligent surface, at this time, the second communication device can request to start the first processing through the third indication information.

[0257] As another possible case, when the second communication device has poor decoding of the main information, or in other words, the quality of the third signal is poor, the second communication device can request to stop the first processing through the third indication information.

[0258] As yet another possible case, the second communication device adjusts the first processing through the third indication information based on its own state, for example, based on the moving status of the second communication device.

[0259] For example, when the second communication device has a high moving speed, the main information reflection phase modulation period T0 described above can be small, and the second communication device can indicate to reduce the modulation order of the first processing through the third indication information, so as to improve the main information receiving performance.

[0260] In the embodiments of the present application, the second communication device can trigger the request or close the smart surface to carry additional information by adjusting part or all of the coefficients, or the second communication device can adjust the parameters of the first processing, thereby further increasing the flexibility of the system.

[0261] 430, the first communication device sends the first indication information, and correspondingly, the smart surface receives the first indication information.

[0262] For the specific content of step 430, reference can be made to step 210 in method 200 described above, and the embodiments of the present application will not be repeated here.

[0263] 440, the first communication device sends the second indication information, and correspondingly, the smart surface receives the second indication information, and the second indication information indicates the order of the first processing.

[0264] As an example, the order of the first processing can represent the modulation order of the auxiliary information. For example, the modulation order of the auxiliary information can include binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK), etc. In the following embodiments, for the convenience of description, the order of the first processing can be referred to as order #A.

[0265] As an example, in combination with step 410 described above, the first communication device can determine the upper limit of the order of the first processing, order #B, according to the beam configuration period T0 in the main information sending scene and the period T1 indicated by the capability information.

[0266] As an example, order #B is related to the capability of the smart surface, and order #A corresponds to the auxiliary information used for smart surface state detection, and the size and accuracy of the data packet of the environmental information such as positioning assistance, sensing information, etc.

[0267] For example, 10 columns of smart surfaces need to report at least 4 bits of information column by column, and four-order block reporting only needs 2 bits of information to realize state anomaly detection.

[0268] Optionally, the value of order #A is less than or equal to order #B.

[0269] As an example, the order #A can be associated with the smart surface capability, the size of the auxiliary information data packet to be modulated, or the function carried by the additional carried information, etc. For example, when the auxiliary information data packet is larger, a larger order #A modulation can be used, or when the smart surface capability is stronger, the order #A can be larger.

[0270] Based on the above technical solution, the modulation order of the first processing of the smart surface can be configured by the second indication information, that is, the modulation order can be adjusted by configuration, so as to adapt to the capability of different smart surfaces, the size of the information data packet to be modulated, or the function carried by the additional carried information, etc.

[0271] Optionally, the order #A can be 2 or 4, that is, the auxiliary information can use binary or quaternary modulation.

[0272] For example, the adjustment amount of adjusting part or all of the coefficients of the smart surface Or,

[0273] As a possible implementation manner, the order of the first processing is 2, and the adjusting part or all of the coefficients of the smart surface includes: inverting / phase inverting the part or all of the coefficients of the smart surface or keeping the coefficients.

[0274] Different coefficient states can represent different bit information, for example, 0 / 1 bit. Further, the auxiliary information can carry different functions, for example, state anomaly detection, etc.

[0275] Referring to FIG. 5, FIG. 5 is a schematic diagram of reporting a state anomaly of a smart surface provided by an embodiment of the present application. As an example, the smart surface in FIG. 5 has 8 columns, and 3 bits are needed to indicate 8 states by indicating whether the column has an anomaly. As an example, please refer to (a) in FIG. 5, at this time, the first column of the smart surface has a state anomaly, and 000 in 3 bits indicates the first column, and the adjustment amount corresponding to the smart surface array can be {e -i*0 ,e -i*0 ,e -i*0} as an example. As another example, please refer to (b) in FIG. 5, at this time, the third column of the smart surface has a state anomaly, and 011 in 3 bits represents the third column, and the adjustment amount corresponding to the smart surface array can be {e -i*0 ,e -i*π ,e -i*π}. The period of phi(t) corresponding to the above examples is 3, that is, three state transitions in a row can form a state or a value of a 3-bit information.

[0276] Optionally, step 440 further includes the following content.

[0277] 440, the first communication device sends second indication information to the second communication device, and the second communication device receives the second indication information, the second indication information indicating the order of the first processing.

[0278] As a possible implementation, the second indication information includes the order #A.

[0279] As another possible implementation, the second indication information includes auxiliary information modulation information, such as the capability information of the smart surface, and the second communication device determines the order #A according to the received auxiliary information modulation information.

[0280] Further, the second communication device can demodulate the second signal according to the order #A to obtain the content of the auxiliary information.

[0281] Based on the above technical solution, the first communication device can indicate the modulation order of the first processing of the smart surface to the second communication device, thereby helping the second communication device to decode the information carried by the signal transmitted by the smart surface, so as to better receive the additional carried information.

[0282] 450, the first communication device sends a first signal to the smart surface, and the smart surface receives the first signal from the first communication device.

[0283] 460, the smart surface sends a second signal to the second communication device, and the second communication device receives the second signal.

[0284] For specific contents of steps 450 and 460, please refer to steps 220 and 230 in the method 200 described above, and the embodiments of the present application will not be repeated here.

[0285] Optionally, the method 400 further includes step 470.

[0286] 470, the second communication device sends feedback information, and the first communication device receives the feedback information.

[0287] The feedback information includes the decoding result of the second communication device on the second signal, or the feedback information indicates that the first communication device controls the smart surface to perform a first operation.

[0288] The first operation includes turning off or not controlling part of the elements of the smart surface.

[0289] As a possible implementation, the decoding result of the second communication device on the second signal is the decoding result of the auxiliary information, such as the state information, environmental information or perception information of the smart surface.

[0290] As another possible implementation, the second communication device controls the intelligent surface to perform the first operation based on the decoding result of the auxiliary information.

[0291] As an example, the decoding result of the auxiliary information indicates that part of the elements of the intelligent surface are faulty, and the first operation can include turning off or not controlling the faulty elements.

[0292] For example, the last two columns of elements of the intelligent surface are faulty, and the feedback information can indicate that the first communication device only designs the coefficients of the elements except the last two columns when designing the coefficients of the intelligent surface next time, and turns off or does not control the last two columns of elements.

[0293] Based on the above technical solutions, the second communication device can feed back the decoding result of the information carried by the signal transmitted by the intelligent surface, or the second communication device can control the intelligent surface through the feedback information. For example, in the application scenario of state monitoring of the intelligent surface, the intelligent surface can be controlled to turn off or not control part of the elements, thereby reducing the indication overhead and improving the flexibility and robustness when the intelligent surface is applied.

[0294] The above embodiments mainly describe that the control right of the intelligent surface is on the network device side. Alternatively, the control right of the intelligent surface can also be on the terminal device side.

[0295] Alternatively, the terminal device receives the capability information transmitted by the intelligent surface in step 410.

[0296] Further, the terminal device can determine the adjustment mode of the coefficients of the intelligent surface or the modulation order of the auxiliary information according to the beam configuration information of the intelligent surface in the main information transmission scenario and the capability information.

[0297] Alternatively, the terminal device sends the first indication information to the intelligent surface in step 430.

[0298] Alternatively, the terminal device sends the second indication information to the intelligent surface in step 440.

[0299] Alternatively, the first indication information and / or the second indication information can be fed back to the network device by the terminal device and sent to the intelligent surface by the network device.

[0300] It can be understood that in some of the above embodiments, the adjustment of part or all of the phases of the intelligent surface is exemplarily described, and the embodiments of the present application are not limited thereto. For example, as long as the scheme of adjusting part or all of the coefficients (such as amplitude or polarization) of the intelligent surface to carry additional information is applicable to the embodiments of the present application.

[0301] It can also be understood that the methods and operations implemented by the devices in the above various method embodiments can also be implemented by the components (such as chips or circuits) of the devices, without limitation.

[0302] The above describes the method provided by the embodiments of the present application in detail in combination with FIG. 2 to FIG. 5. The following describes the apparatus provided by the embodiments of the present application in combination with FIG. 6 to FIG. 8. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, the content not described in detail can be referred to the method embodiments described above, which will not be described here for brevity.

[0303] Referring to FIG. 6, FIG. 6 is a schematic diagram of a communication apparatus 600 provided by the embodiments of the present application, as an example. The communication apparatus 600 includes a transceiver unit 610 and a processing unit 620. The transceiver unit 610 can be configured to implement corresponding communication functions. The transceiver unit 610 can also be referred to as a communication interface or a communication unit. The processing unit 620 can be configured to perform processing, such as determining information bits.

[0304] Optionally, the apparatus 600 can further include a storage unit, which can be configured to store instructions and / or data. The processing unit 620 can read the instructions and / or data in the storage unit, so that the apparatus implements the foregoing method embodiments.

[0305] In a first possible design, the apparatus 600 can be the smart surface in the foregoing embodiments, and the apparatus 600 can implement the steps or procedures performed by the smart surface in the foregoing method embodiments. The transceiver unit 610 can be configured to perform the operations related to the transceiving (such as the operations of transmitting and / or receiving data or messages) of the smart surface in the foregoing method embodiments, and the processing unit 620 can be configured to perform the operations related to the processing of the smart surface in the foregoing method embodiments, or the operations other than the transceiving (such as the operations other than transmitting and / or receiving data or messages).

[0306] In a possible implementation, the transceiver unit 610 is configured to receive first indication information, where the first indication information indicates that the smart surface performs first processing, and the first processing includes adjusting part or all of the coefficients of the smart surface; the transceiver unit 610 is further configured to receive a first signal from a first communication apparatus; and the transceiver unit 610 is further configured to transmit a second signal to a second communication apparatus, where the second signal is obtained by processing the first signal based on the first processing.

[0307] In a second possible design, the apparatus 600 can be the network device in the foregoing embodiments, and the apparatus 600 can implement the steps or procedures performed by the network device in the foregoing method embodiments. The transceiver unit 610 can be configured to perform the operations related to the transceiving (such as the operations of transmitting and / or receiving data or messages) of the network device in the foregoing method embodiments, and the processing unit 620 can be configured to perform the operations related to the processing of the network device in the foregoing method embodiments, or the operations other than the transceiving (such as the operations other than transmitting and / or receiving data or messages).

[0308] One possible implementation is a transceiver unit 610, which is used to send first indication information, the first indication information instructing the smart surface to perform a first process, the first process including adjusting some or all of the coefficients of the smart surface; the transceiver unit 610 is also used to send a first signal to the smart surface, the first signal can be used to obtain a second signal based on the first process, and the second signal can be sent by the smart surface to a second communication device.

[0309] In a third possible design, the device 600 can be the terminal described in the foregoing embodiments. This device 600 can implement the steps or processes executed by the terminal corresponding to those described in the method embodiments above. Specifically, the transceiver unit 610 can be used to perform transceiver-related operations (such as sending and / or receiving data or messages) of the terminal in the method embodiments above, and the processing unit 620 can be used to perform processing-related operations of the terminal in the method embodiments above, or operations other than transceiver operations (such as operations other than sending and / or receiving data or messages).

[0310] One possible implementation is a transceiver unit 610, which is used to receive a second signal, which is obtained by the smart surface processing the first signal based on a first processing, the first processing including adjusting some or all of the coefficients of the smart surface, and the first signal coming from a first communication device; the transceiver unit 610 is also used to send feedback information, the feedback information including the decoding result of the second signal by the second communication device; or, the feedback information instructs the first communication device to control the smart surface to perform a first operation, the first operation including turning off or not controlling some of the elements of the smart surface.

[0311] It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0312] It should also be understood that the device 600 here is embodied in the form of a functional unit. The term "unit" here can refer to an application-specific integrated circuit (ASIC), electronic circuitry, a processor (e.g., a shared processor, a proprietary processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, integrated logic circuitry, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the device 600 can specifically be the communication device in the above embodiments, and can be used to execute the various processes and / or steps corresponding to the communication device in the above method embodiments; to avoid repetition, these will not be described again here.

[0313] The apparatus 600 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the communication device (e.g., terminal, or network device) in the above-mentioned methods. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (e.g., the transmitting unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, which respectively performs the transceiving operation and related processing operation in each method embodiment.

[0314] In addition, the transceiver unit 610 can also be a transceiver circuit (e.g., which can include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.

[0315] It should be noted that the apparatus in FIG. 6 can be a communication device (e.g., terminal, or network device) in the foregoing embodiments, or can be a chip or a chip system, such as a system on chip (SoC). The transceiver unit can be an input / output circuit or a communication interface, and the processing unit can be a processor or a microprocessor integrated on the chip or an integrated circuit. In this regard, no limitation is made.

[0316] Referring to FIG. 7, as an example, FIG. 7 is a schematic diagram of another communication apparatus 700 provided in an embodiment of the present application. The apparatus 700 includes a processor 710, and the processor 710 is coupled with a memory 720. The memory 720 is configured to store computer programs or instructions and / or data, and the processor 710 is configured to execute the computer programs or instructions stored in the memory 720, or read the data stored in the memory 720, to perform the method in each method embodiment described above.

[0317] Optionally, the processor 710 is one or more.

[0318] Optionally, the memory 720 is one or more.

[0319] Optionally, the memory 720 is integrated with the processor 710, or is separately arranged.

[0320] Optionally, as shown in FIG. 7, the apparatus 700 further includes a transceiver 730, which is configured to receive and / or send signals. For example, the processor 710 is configured to control the transceiver 730 to receive and / or send signals.

[0321] As an example, the processor 710 can have the function of the processing unit 620 shown in FIG. 6, the memory 720 can have the function of a storage unit, and the transceiver 730 can have the function of the transceiver unit 610 shown in FIG. 6.

[0322] As an option, the apparatus 700 is configured to implement the operations performed by a communication device (e.g., a terminal, and also a network device) in each of the above method embodiments.

[0323] For example, the processor 710 is configured to execute the computer programs or instructions stored in the memory 720 to implement the relevant operations of the communication device in each of the above method embodiments.

[0324] It should be understood that the processor mentioned in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0325] It should also be understood that the memory mentioned in the embodiments of the present application can be a volatile memory and / or a non-volatile memory. The non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM). For example, the RAM can be used as an external cache. As an example but not limitation, the RAM includes the following various forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0326] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated in the processor.

[0327] It should also be noted that the memory described herein is intended to include, but not limited to, these and any other suitable type of memory.

[0328] Referring to FIG. 8, as an example, FIG. 8 is a schematic diagram of a chip system 800 provided by embodiments of the present application. The chip system 800 (or also can be referred to as a processing system) includes a logic circuit 810 and an input / output interface 820.

[0329] The logic circuit 810 can be a processing circuit in the chip system 800. The logic circuit 810 can be coupled to a storage unit, call instructions in the storage unit, so that the chip system 800 can implement the methods and functions of the embodiments of the present application. The input / output interface 820 can be an input / output circuit in the chip system 800, output the information processed by the chip system 800, or input the data or signaling information to be processed by the chip system 800 for processing.

[0330] As a solution, the chip system 800 is used to implement the operations performed by the communication device (such as a terminal, and also like a network device) in the above various method embodiments.

[0331] For example, the logic circuit 810 is used to implement the processing related operations performed by the communication device (such as a terminal, and also like a network device) in the above method embodiments; the input / output interface 820 is used to implement the sending and / or receiving related operations performed by the communication device (such as a terminal, and also like a network device) in the above method embodiments.

[0332] The embodiments of the present application also provide a computer readable storage medium, which has stored thereon a computer program or instructions for implementing the method performed by the communication device (such as a terminal, and also like a network device) in the above various method embodiments. For example, the computer program or instructions run on the communication device, so that the communication device (such as a terminal, and also like a network device) performs the above method (such as method 200 or method 400).

[0333] The embodiments of the present application also provide a computer program product, which contains instructions executed by a computer to implement the method performed by the communication device (such as a terminal, and also like a network device) in the above various method embodiments. For example, when the computer program or instructions run on the communication device, so that the communication device (such as a terminal, and also like a network device) performs the above method (such as method 200 or method 400).

[0334] The embodiments of the present application also provide a communication system, which comprises the terminal and / or network device in the above embodiments. For example, the system comprises the terminal and network device in the embodiments of FIG. 2 or FIG. 4.

[0335] The explanations and beneficial effects of the related contents in any of the above provided devices can refer to the corresponding method embodiments provided above, which will not be repeated here.

[0336] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other means. For example, the above-described device embodiments are only illustrative, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0337] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable apparatus. For example, the computer can be a personal computer, a server, a network device, etc. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD), etc. For example, the foregoing available media includes but is not limited to: a variety of media that can store program codes such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0338] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of signal transmission, characterized by, Applicable to a smart surface, comprising: receiving first indication information, the first indication information indicating the smart surface to perform a first processing, the first processing including adjusting part or all coefficients of the smart surface; receiving a first signal from a first communication device; sending a second signal to a second communication device, the second signal being obtained by processing the first signal based on the first processing.

2. The method of claim 1, wherein, Further comprising: receiving second indication information, the second indication information indicating the order of the first processing.

3. The method of claim 2, wherein, The order of the first processing is 2, and the adjusting part or all coefficients of the smart surface includes taking the opposite of part or all coefficients of the smart surface or coefficient retention.

4. The method according to any one of claims 1 to 3, characterized in that, Further comprising: sending capability information of the smart surface, the capability information indicating the minimum period of the adjusting part or all coefficients of the smart surface.

5. The method of claim 4, wherein, The capability information includes coefficient adjustment minimum time resolution or minimum beam retention period.

6. A method of signal transmission, characterized by, Applicable to a first communication device, comprising: sending first indication information, the first indication information indicating the smart surface to perform a first processing, the first processing including adjusting part or all coefficients of the smart surface; sending a first signal to the smart surface, the first signal being capable of obtaining a second signal based on the first processing, the second signal being capable of being sent by the smart surface to a second communication device.

7. The method of claim 6, wherein, Further comprising: sending second indication information to the smart surface, the second indication information indicating the order of the first processing.

8. The method of claim 7, wherein, The order of the first processing is 2, and the adjusting part or all coefficients of the smart surface includes taking the opposite of part or all coefficients of the smart surface or coefficient retention.

9. The method according to claim 7 or 8, characterized in that, Further comprising: sending the second indication information to the second communication device.

10. The method according to any one of claims 6 to 9, characterized in that, Further comprising: receiving capability information of the smart surface, the capability information indicating the minimum period of the adjusting part or all coefficients of the smart surface.

11. The method of claim 10, wherein, The capability information includes coefficient adjustment minimum time resolution or minimum beam retention period.

12. The method according to any one of claims 6 to 11, characterized in that, Further comprising: receiving feedback information, the feedback information including the decoding result of the second signal by the second communication device; Or, The feedback information indicates that the first communication device controls the smart surface to perform a first operation, the first operation including turning off or not controlling part of the smart surface.

13. The method according to any one of claims 6 to 12, characterized in that, Further comprising: receiving third indication information, the third indication information indicating that the first communication device controls the smart surface to start or stop the first processing; Or, The third indication information indicates that the first communication device controls the smart surface to adjust the first processing.

14. The method of claim 13, wherein, The third indication information is determined according to the quality of the third signal sent by the first communication device to the second communication device.

15. The method according to any one of claims 1 to 14, characterized in that, The first indication information indicates a first set, and the first set includes the adjustment amount of the adjusting part or all coefficients of the smart surface.

16. The method of claim 15, wherein, The first indication information further indicates a basis coefficient The first indication information further indicates a basis coefficient For the first processing, the first processing includes adjusting part or all of the coefficients of the smart surface, including: The first processing includes adjusting some or all of the coefficients of the smart surface to The The element is selected from the first set according to a first rule.

17. The method of claim 16, wherein, The first rule indicates the order of selecting elements from the first set.

18. The method of claim 16 or 17, wherein, The first indication information further indicates a period and / or the first rule, the period representing a period of adjusting the part or all of the coefficients of the intelligent surface.

19. The method of any one of claims 1 to 14, wherein, The first indication information indicates a time-varying function The The adjustment amount of adjusting the part or all of the coefficients of the smart surface at the time t0 is indicated 20. The method of claim 19, wherein, The first indication information further indicates a basis coefficient The first indication information further indicates a basis coefficient For the first processing, the first processing includes adjusting part or all of the coefficients of the smart surface, including: The first processing comprises adjusting, at a time t0, some or all of the coefficients of the smart surface to 21. A method of signal transmission, characterized by, Applied to a second communication device, comprising: receiving a second signal, the second signal being obtained by the intelligent surface based on a first processing, the first processing comprising adjusting the part or all of the coefficients of the intelligent surface, the first signal being from a first communication device; sending feedback information, the feedback information comprising a decoding result of the second communication device on the second signal; or, the feedback information instructing the first communication device to control the intelligent surface to perform a first operation, the first operation comprising turning off or not controlling the part of the elements of the intelligent surface.

22. The method of claim 21, wherein, Further comprising: receiving second indication information, the second indication information indicating an order of the first processing.

23. The method of claim 22, wherein, The order of the first processing is 2, and the adjusting the part or all of the coefficients of the intelligent surface comprises: inverting the part or all of the coefficients of the intelligent surface or keeping the coefficients.

24. The method of any one of claims 21-23, wherein, Further comprising: sending third indication information, the third indication information instructing the first communication device to control the intelligent surface to start or stop the first processing; or, the third indication information instructing the first communication device to control the intelligent surface to adjust the first processing.

25. The method of claim 24, wherein, The third indication information is determined according to a quality of a third signal sent by the first communication device to the second communication device.

26. The method of any one of claims 1 to 25, wherein, The coefficients comprise at least one of phase, amplitude or polarization.

27. A communications device, characterized by A module or unit for performing the method of any one of claims 1 to 26.

28. A communications device, characterized by A processor configured to cause the communication device to perform the method of any one of claims 1 to 26.

29. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored thereon a computer program or instructions, which, when executed on a communication device, cause the communication device to perform the method of any one of claims 1 to 26.

30. A computer program product, characterised in that, The computer program product comprises a computer program or instructions, which, when executed on a communication device, cause the communication device to perform the method of any one of claims 1 to 26.

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