Intelligent metasurface accessory device and terminal communication method

Abstract

The embodiment of the invention provides an intelligent metasurface accessory device and a terminal communication method, the accessory device is fixedly connected with a terminal or detachably connected with the terminal, the accessory device comprises a plurality of single intelligent metasurfaces, and the single intelligent metasurfaces are connected. Wherein the plurality of single intelligent metasurfaces comprise a folded state and an unfolded state; in the folded state, the accessory device is used for assisting the terminal to perform uplink communication; in the unfolded state, the accessory device is used for assisting the terminal and at least one of peripheral terminals of the terminal to perform uplink communication and / or downlink communication. Therefore, the terminal can be assisted to perform uplink enhancement by folding the plurality of single intelligent metasurfaces, and at least one of the terminal and the peripheral terminal can be assisted to perform uplink enhancement and / or downlink enhancement by unfolding the plurality of single intelligent metasurfaces, so that the communication environment and state of the terminal and / or the peripheral terminal can be improved, and the communication requirement can be met.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an intelligent metasurface accessory device and a terminal communication method. Background Art

[0002] Reconfigurable Intelligence Surface (RIS), also known as reconfigurable intelligent surface, is an artificial electromagnetic surface structure with programmable electromagnetic properties. It is composed of a large number of carefully designed electromagnetic units. The electromagnetic properties of the electromagnetic units can be dynamically controlled through control circuits to achieve intelligent reconstruction of wireless signal propagation characteristics in three-dimensional space. Intelligent metasurfaces can usually assist base stations in downlink communications to enhance the signal quality of downlink signals received by terminals. However, in actual application scenarios, for terminals, when performing uplink or downlink communications, there is usually a need for uplink enhancement or downlink enhancement. Considering the characteristics of intelligent metasurfaces, if intelligent metasurfaces can be combined with terminals, it will effectively assist terminals in communication. Summary of the invention

[0003] The embodiments of the present application provide an intelligent metasurface accessory device and a terminal communication method, which are used to solve the problem of how the intelligent metasurface assists the terminal in communicating.

[0004] To solve the above technical problems, the embodiments of the present application are implemented as follows:

[0005] In a first aspect, a smart metasurface accessory device is provided, wherein the accessory device is fixedly connected to a terminal or is detachably connected to the terminal, and the accessory device comprises a plurality of monomer smart metasurfaces, wherein the plurality of monomer smart metasurfaces are connected, wherein:

[0006] The plurality of monomer smart metasurfaces include a folded state and an unfolded state;

[0007] In the retracted state, the accessory device is used to assist the terminal in uplink communication;

[0008] In the unfolded state, the accessory device is used to assist the terminal and at least one of the peripheral terminals of the terminal in performing uplink communication and / or downlink communication.

[0009] In a second aspect, a terminal communication method is provided, which is applied to the terminal, and the terminal is fixedly connected or detachably connected to the smart metasurface accessory device according to the first aspect, and the method includes:

[0010] Acquiring a communication quality parameter of the terminal;

[0011] According to the communication quality parameter of the terminal, the working state of the multiple single intelligent metasurfaces is determined, and the working state is the folded state or the unfolded state.

[0012] According to a third aspect, an electronic device is provided, including:

[0013] processor;

[0014] a memory for storing instructions executable by the processor;

[0015] The processor is configured to execute the instructions to implement the method as described in the second aspect.

[0016] According to a fourth aspect, a computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method described in the second aspect.

[0017] In a fifth aspect, a terminal is provided, which is fixedly connected or detachably connected to the intelligent metasurface accessory device described in the first aspect.

[0018] In an embodiment of the present application, the terminal can be fixedly connected or detachably connected to a smart metasurface accessory device, and the accessory device includes a plurality of connected single-unit smart metasurfaces, and the plurality of single-unit smart metasurfaces have two states: folded and unfolded. In the folded state, the accessory device can be used to assist the terminal in uplink communication, and in the unfolded state, the accessory device can be used to assist the terminal and at least one of its surrounding terminals in uplink communication and / or downlink communication. Thus, when there is a communication demand, the terminal can be assisted in uplink enhancement by folding a plurality of single-unit smart metasurfaces, and the terminal and at least one of its surrounding terminals can be assisted in uplink enhancement and / or downlink enhancement by unfolding a plurality of single-unit smart metasurfaces, thereby improving the communication environment and state of the terminal and / or surrounding terminals and meeting the communication needs of the terminal and / or surrounding terminals. In addition, since multiple single-body intelligent metasurfaces can assist the terminal in uplink communication when in a folded state, the RF chain transmission power of the terminal can be effectively reduced and the terminal power consumption can be saved. Since multiple single-body intelligent metasurfaces can assist the terminal and / or at least one of the surrounding terminals in uplink enhancement and / or downlink enhancement when in an unfolded state, the terminal's uplink and / or downlink transmission requirements for itself and the surrounding terminals can be met, thereby achieving flexible application in complex scenarios with ever-changing wireless communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 is a schematic diagram of the structure of an intelligent metasurface attachment device according to an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of a plurality of monomer smart metasurfaces in a folded state and an unfolded state according to an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the structure of multiple single-body intelligent metasurfaces and a shielding cover in one embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of an embodiment of the present application that supports a gimbal to drive multiple single intelligent metasurfaces to fold and unfold;

[0024] Figure 5 It is a schematic diagram of an embodiment of the present application in which the outer cover shaft and the supporting platform serve as supporting points for multiple single-body intelligent metasurfaces;

[0025] Figure 6 is a schematic diagram of an embodiment of the present application in which a supporting platform is fixed on a terminal surface via a U-shaped frame;

[0026] Figure 7 is a schematic diagram of a torsion spring hinge and a third motor according to an embodiment of the present application;

[0027] Figure 8 It is a schematic diagram of a plurality of single-body intelligent metasurface full surround terminals according to an embodiment of the present application;

[0028] Fig. 9 is a schematic diagram of a control circuit board provided in a supporting gimbal according to an embodiment of the present application;

[0029] Fig.10 is a schematic diagram of an embodiment of the present application communicating based on STAR-RIS;

[0030] Fig.11 It is a flowchart of a terminal communication method according to an embodiment of the present application;

[0031] Fig.12 It is a schematic diagram of a plurality of single intelligent metasurfaces used for uplink enhancement in a collapsed state according to an embodiment of the present application;

[0032] Fig.13 It is a schematic diagram of an embodiment of the present application in which multiple monomer smart metasurfaces are used for simultaneous uplink enhancement and downlink enhancement in a single-layer tiling state;

[0033] Fig.14 It is a schematic diagram of an embodiment of the present application in which multiple single intelligent metasurfaces assist terminals in communicating in a folded state and an unfolded state;

[0034] Fig.15 It is a flowchart of a terminal communication method according to an embodiment of the present application;

[0035] Fig.16 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application;

[0036] Fig.17 It is a structural diagram of a terminal communication device according to an embodiment of the present application.

[0037] in, Figures 1 to 9 The corresponding relationship between the reference numerals and component names in the figure is:

[0038] 10 intelligent metasurface accessory device, 11 terminal, 101 single intelligent metasurface, 21 camera or other auxiliary peripherals, 22 torsion spring hinge, 221 torsion spring, 222 hinge, 31 shielding cover, 32 first rotating shaft, 33 first motor, 34 support rod, 41 supporting gimbal, 42 second rotating shaft, 60 U-shaped frame, 61 telescopic cylinder, 62 adjusting nut, 63 tongue, 71 third motor, 81 retractable single intelligent metasurface, 90 control circuit board, 91 controller, 92 communication module, 93 battery, 94 power management module, 95 memory. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in one or more embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of this document.

[0040] The terms "first", "second", etc. in the present application and the claims are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the present application embodiment can be implemented in an order other than those illustrated or described here. In addition, the term "and / or" in the present application and the claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other before and after are a kind of "or" relationship.

[0041] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0042] Figure 1 It is a schematic structural diagram of an intelligent metasurface accessory device 10 according to an embodiment of the present application.

[0043] Figure 1 The smart metasurface accessory device 10 is connected to the terminal 11, and the connection method can be fixed or detachable. The smart metasurface accessory device 10 includes multiple single smart metasurfaces 101, and the multiple single smart metasurfaces 101 are connected. Among them, the multiple single smart metasurfaces 101 include a folded state and an unfolded state ( Figure 1 (not shown), in the folded state, the smart metasurface accessory device 10 can assist the terminal 11 in uplink communication. In the unfolded state, the smart metasurface accessory device 10 can assist the terminal 11 and at least one of the peripheral terminals of the terminal 11 in uplink communication and / or downlink communication.

[0044] The smart metasurface accessory device (hereinafter referred to as the accessory device) is fixedly connected to the terminal, and the accessory device may be connected to the terminal through a fixing or other object, and after the connection, the accessory device and the terminal cannot be disassembled. For example, the accessory device can be welded to the terminal through a fixing such as a metal bracket, or adhered to the terminal through an object such as a super glue. After the accessory device is welded or adhered to the terminal, the accessory device and the terminal cannot be disassembled. Among them, the accessory device is fixedly connected to the terminal, and it can be fixedly connected to the shell of the terminal.

[0045] The accessory device is connected to the terminal in a detachable manner, which may be that the accessory device is connected to the terminal through a movable part, and after the connection, the accessory device and the terminal are detachable. For example, the accessory device can be fixed to the terminal through a movable part such as a U-shaped frame, and the U-shaped frame is detachable from the terminal, so that the accessory device and the terminal are detachable. Among them, the accessory device is connected to the terminal in a detachable manner, which may be that the accessory device is connected to the shell of the terminal in a detachable manner.

[0046] The multiple monomer smart metasurfaces are connected, and the multiple monomer smart metasurfaces can be connected in sequence through a connector. Optionally, the connector can be a torsion spring hinge, etc., which is not specifically limited here.

[0047] The above-mentioned terminal may be a fixed terminal or a mobile terminal with a communication function. For example, the terminal may be a customer premise equipment (CPE), a vehicle terminal, a mobile phone, a tablet computer, a smart home, etc.

[0048] The peripheral terminals of the terminal may be other terminals around the terminal, for example, terminals with device-to-device (D2D) communication functions such as Internet of Vehicles, terminals with weak indoor coverage signals, low-power Internet of Things terminals, etc. The number of peripheral terminals may be one or more.

[0049] The accessory device includes multiple monomer smart metasurfaces. The reason for setting up multiple monomer smart metasurfaces is that, on the one hand, the number of electromagnetic units that can be configured in a single monomer smart metasurface is limited, while the number of electromagnetic units in multiple monomer smart metasurfaces is large, which can meet the demand for the number of electromagnetic units; on the other hand, multiple monomer smart metasurfaces have two states: folded and unfolded. By folding and unfolding multiple monomer smart metasurfaces, the communication needs of the terminal in different scenarios can be met, while a single monomer smart metasurface cannot be unfolded or folded, and therefore cannot meet the communication needs of the terminal in different scenarios.

[0050] The specific number of multiple single-body smart metasurfaces can be determined according to actual needs and is not specifically limited here. Optionally, for mobile terminals, in order to avoid too many single-body smart metasurfaces affecting the convenience of use of mobile terminals, the number of multiple single-body smart metasurfaces can be set to be smaller, for example, 3-5. For fixed terminals, since fixed terminals are not sensitive to convenience of use, the number of multiple single-body smart metasurfaces can be set to be larger, for example, 5 or more.

[0051] The folded state of multiple monomer smart supersurfaces can be a state in which multiple monomer smart supersurfaces are superimposed and folded in multiple layers. For example, if the number of monomer smart supersurfaces is 3, the folded state of the three monomer smart supersurfaces can be a state in which three layers are superimposed and folded, and each layer includes a monomer smart supersurface. For another example, if the number of monomer smart supersurfaces is 6, the folded state of the six monomer smart supersurfaces can be a state in which three layers are superimposed and folded, and each layer includes two monomer smart supersurfaces. Of course, in other possible implementations, multiple monomer smart supersurfaces can also be other forms of multi-layer superposition and folding, and other possible implementations are no longer illustrated one by one here. Optionally, the folded state of multiple monomer smart supersurfaces can be the default state (i.e., the default state) of multiple monomer smart supersurfaces.

[0052] It should be noted that when multiple monomer smart metasurfaces are stacked and folded together, there needs to be a certain gap between the two adjacent layers of monomer smart metasurfaces. The gap is usually related to the carrier wavelength. Generally, the smaller the carrier wavelength, the smaller the gap can be.

[0053] The unfolded state of multiple monomer smart super surfaces may be a state in which multiple monomer smart super surfaces are unfolded in a single layer. Optionally, the unfolded state may include at least one unfolding mode, and the at least one unfolding mode may include at least one of a single-layer tiling, a single-layer non-tiling, a semi-surrounding terminal, and a fully-surrounding terminal. That is, the unfolded state may include at least one of a single-layer tiling state, a single-layer non-tiling state, a semi-surrounding terminal state, and a fully-surrounding terminal state. Among them, the single-layer tiling state may be a state in which multiple monomer smart super surfaces are tiling in a single-layer wing. The single-layer non-tiling state may be a state in which the angle between two adjacent monomer smart super surfaces is not 180 degrees when multiple monomer smart super surfaces are in a single-layer wing state. The state of the semi-surround terminal and the state of the full-surround terminal may be special cases of multiple monomer intelligent supersurfaces in a single-layer non-tiled state. Specifically, the state of the semi-surround terminal may be the state of the semi-surround terminal presented when the angle between the monomer intelligent supersurfaces meets certain conditions when the multiple monomer intelligent supersurfaces are in a single-layer non-tiled state, and the state of the full-surround terminal may be the state of the full-surround terminal presented when the angle between the monomer intelligent supersurfaces meets certain conditions when the multiple monomer intelligent supersurfaces are in a single-layer non-tiled state. In the case of multiple monomer intelligent supersurface semi-surround or full-surround terminals, the intelligent supersurface can cover multiple directions or all directions around the terminal, so that the communication of the terminal in multiple directions can be assisted and enhanced.

[0054] Figure 2 This is a schematic diagram of multiple monomer smart metasurfaces in a folded state and an unfolded state according to an embodiment of the present application. Figure 2 Take three monomer smart metasurfaces as an example for explanation. Figure 2 A and Figure 2 In B, the smart metasurface attachment device 10 is fixedly connected to the terminal 11 or connected in a detachable manner, and the three monomer smart metasurfaces are connected by a torsion spring hinge 22 (such as Figure 2 As shown in B, Figure 2 A is not shown). Figure 2 A is the folded state of three monomer smart metasurfaces 101, and the three monomer smart metasurfaces 101 are in a state of three layers of superposition and folding. Figure 2 B is the unfolded state of three monomer smart metasurfaces 101, and the three monomer smart metasurfaces 101 are unfolded in a single-layer wing-spreading manner.

[0055] In an embodiment of the present application, multiple monomer smart metasurfaces can be used for uplink enhancement in a folded state, can be used for uplink enhancement in an expanded state, or for downlink enhancement, or for both uplink enhancement and downlink enhancement. Among them, multiple monomer smart metasurfaces have multi-layer cascading and penetration losses in a multi-layer superimposed and folded state, and are sensitive to interference. Therefore, it is necessary to shield the external interference of multiple monomer smart metasurfaces in a multi-layer superimposed and folded state. Optionally, a shielding cover containing an absorbing material can be provided in the smart metasurface accessory device, and the shielding cover can be used to shield external interference. Specifically, when multiple monomer smart metasurfaces are in a multi-layer superimposed and folded state, multiple monomer smart metasurfaces can be folded in the shielding cover, that is, the shielding cover covers multiple monomer smart metasurfaces in a multi-layer superimposed and folded state, thereby shielding external interference.

[0056] In the case where the smart metasurface accessory device includes a shielding cover, considering that the multiple monomer smart metasurfaces also include an unfolded state, and the multiple monomer smart metasurfaces need to break the shielding cover before they can be unfolded when switching from the folded state to the unfolded state, therefore, the shielding cover needs to be openable and closable. In this way, when the multiple monomer smart metasurfaces are in the folded state, the shielding cover can be closed to shield external interference, and when the multiple monomer smart metasurfaces need to be unfolded, the shielding cover can be opened so that the multiple monomer smart metasurfaces can be unfolded.

[0057] In order to realize the opening and closing of the shielding cover, optionally, in one implementation, the shielding cover may be provided with a support rod and a first rotating shaft. The first rotating shaft may be driven by a first motor, and when the first motor drives the first rotating shaft to rotate, the first rotating shaft may control the support rod to drive the shielding cover to open or close. In this way, when multiple monomer smart metasurfaces are in a retracted state, the first motor may drive the first rotating shaft to rotate, so that the first rotating shaft controls the support rod to drive the shielding cover to close, and the multiple monomer smart metasurfaces are covered in the shielding cover to shield external interference. When multiple monomer smart metasurfaces are unfolded, the first motor may drive the first rotating shaft to rotate, so that the first rotating shaft controls the support rod to drive the shielding cover to open, and the multiple monomer smart metasurfaces extend outward from the inside of the shielding cover to unfold multiple monomer smart metasurfaces. Among them, the first motor may be powered and controlled by the smart metasurface accessory device, or powered and controlled by the terminal. When multiple monomer smart metasurfaces extend outward from the shielding cover, they can extend from the middle of the shielding cover or from both sides of the shielding cover, and there is no specific limitation here.

[0058] For easier understanding, see Figure 3 . Figure 3 An example is given for explanation of an intelligent metasurface accessory device including three monomeric intelligent metasurfaces. Figure 3In A, three monomer smart metasurfaces 101 are connected by torsion spring hinges 22 and are folded in a shielding outer cover 31 in a three-layer stacked manner. The shielding outer cover 31 is in a closed state. In the closed state, the shielding outer cover 31 can shield the three monomer smart metasurfaces 101 from external interference. The shielding outer cover 31 has a support rod 34 and a first rotating shaft 32. The first rotating shaft 32 contains a first motor 33, and the first motor 33 can drive the first rotating shaft 32 to rotate. When the three monomer smart metasurfaces 101 need to be unfolded, the first motor 33 can be powered, and the first motor 33 can drive the first rotating shaft 32 to rotate. When the first rotating shaft 32 rotates, the support rod 34 is controlled to drive the shielding outer cover 31 to open to both sides, and the three monomer smart metasurfaces 101 extend from both sides of the shielding outer cover 31 to Figure 3 B. In the unfolded state, the shielding cover 31 is in an open state. When the three monomer smart metasurfaces 101 are switched from the unfolded state to the folded state, the first motor 33 can be powered, and the first motor 33 drives the first shaft 32 to rotate. When the first shaft 32 rotates, the control support rod 34 drives the shielding cover 31 to fold from both sides to the middle. Figure 3 A shows the closed state.

[0059] Optionally, in the case where the smart metasurface accessory device includes a shielding cover, the smart metasurface accessory device can be connected to the terminal through the shielding cover, and the shielding cover can be fixedly connected to the terminal or connected to the terminal in a detachable manner. The shielding cover is fixedly connected to the terminal, and the bottom of the first rotating shaft of the shielding cover can be welded to the terminal surface (such as the shell of the terminal), or the bottom of the first rotating shaft can be fixed to the terminal surface by means of strong glue or the like. The shielding cover is connected to the terminal in a detachable manner, and the bottom of the first rotating shaft can be fixed to the terminal surface by detachable devices such as screws / nuts.

[0060] Optionally, the intelligent metasurface accessory device may further include a supporting gimbal. The intelligent metasurface accessory device is connected to the terminal, and may be connected to the terminal through the supporting gimbal. The supporting gimbal may be fixedly connected to the terminal or connected to the terminal in a detachable manner. Among them, the supporting gimbal is fixedly connected to the terminal, and the bottom of the supporting gimbal may be welded to the surface of the terminal (such as the shell of the terminal), or the supporting gimbal may be fixed to the surface of the terminal by means of strong glue or the like. The supporting gimbal is connected to the terminal in a detachable manner, and the bottom of the supporting gimbal may be fixed to the surface of the terminal by a detachable device such as a screw / nut pair or a U-shaped frame.

[0061] The support platform can support multiple single intelligent metasurfaces and can drive multiple single intelligent metasurfaces to expand or collapse. Specifically, the support platform has a second rotating shaft, which can be driven by a second motor. When the second rotating shaft rotates, it can drive the support platform to rotate. When the support platform rotates, it can drive multiple single intelligent metasurfaces to expand or collapse. The second motor can be powered and controlled by the intelligent metasurface accessory device, or it can be powered and controlled by the terminal.

[0062] For easier understanding, see Figure 4 . Figure 4 Take the example of a smart metasurface accessory device including three monomer smart metasurfaces. It should be noted that: Figure 4 The smart metasurface attachment device shown is compared to Figure 3 The support platform 41 is added, and the other parts are the same as Figure 3 same, Figure 4 For parts not shown in the figure, refer to Figure 3 The description of the corresponding components in will not be repeated here.

[0063] Figure 4 In the embodiment, the intelligent metasurface accessory device is connected to the terminal 11 via a support platform 41 (which can be fixedly connected or detachably connected). The support platform 41 is located on the right side of the terminal, and the support platform 41 is connected to the three monomer intelligent metasurfaces 101 so as to drive the three monomer intelligent metasurfaces to expand or collapse. The support platform 41 has a second rotating shaft 42, which can be driven by a second motor ( Figure 4 When the second motor drives the second shaft 42 to rotate, the second shaft 42 can drive the support platform 41 to rotate. When the support platform 41 rotates, it can drive multiple monomer smart metasurfaces 101 to expand or collapse. The specific process is as follows:

[0064] like Figure 4 As shown in A, in the folded state, the three monomer smart metasurfaces 101 are folded in the shielding cover 31 in a three-layer stacking manner. When the three monomer smart metasurfaces are unfolded, the shielding cover 31 can be controlled to be opened first, and then the second motor can be powered, and the second motor drives the second shaft 42 to rotate. When the second shaft 42 rotates, it drives the support platform 41 to rotate. When the support platform 41 rotates, it drives multiple monomer smart metasurfaces 101 to rotate from the horizontal direction to the vertical direction, as shown in FIG. Figure 4 As shown in B. Figure 4 In the state shown in B, the shielding cover 31 can be opened and the three single intelligent metasurfaces can be unfolded at the same time. The unfolded state is as follows: Figure 4 As shown in C. Figure 4In C, the shielding cover 41 is in an open state, and the three monomer smart metasurfaces are in a single-layer flat state. When the three monomer smart metasurfaces are folded together, the three monomer smart metasurfaces can be first superimposed and folded to a vertical direction, and then the shielding cover 31 can be controlled to be closed, such as Figure 4 As shown in B. Figure 4 In the state shown in B, the second motor can be powered, and the second motor drives the second rotating shaft 42 to rotate. When the second rotating shaft 42 rotates, it drives the supporting platform 41 to rotate. When the supporting platform 41 rotates, it drives the multiple monomer smart metasurfaces 101 to rotate from the vertical direction to the horizontal direction, and then continues to close the shielding cover 31 until the three monomer smart metasurfaces are covered in the shielding cover 31. Figure 4 A. In the whole process, the specific implementation method of controlling the opening and closing of the shielding cover 31 can be found in Figure 3 The illustrated embodiment will not be described in detail here.

[0065] It should be noted that, in the case where the smart metasurface accessory device includes a shielding cover and is connected to the terminal through a supporting gimbal, the smart metasurface accessory device can be connected to the terminal through the shielding cover and / or the supporting gimbal, that is, the shielding cover and / or the supporting gimbal are fixedly connected to the terminal or connected to the terminal in a detachable manner. In this way, the connection between the smart metasurface accessory device and the terminal can be made more stable. Among them, the shielding cover can be connected to the left side or upper side of the terminal, and the supporting gimbal can be connected to the right side or lower side of the terminal.

[0066] In addition, when the smart metasurface accessory device includes a shielding cover and is connected to the terminal through a supporting platform, the shielding cover and / or the supporting platform can also support multiple single-body smart metasurfaces. In the case where the number of single-body smart metasurfaces is small, the shielding cover or the supporting platform can support multiple single-body smart metasurfaces, such as Figure 4 As shown in FIG. 1 , when there are a large number of single-unit intelligent metasurfaces, the shielding cover and the supporting gimbal can jointly support the multiple single-unit intelligent metasurfaces, such as Figure 5 shown.

[0067] Figure 4 In the embodiment, considering that the number of the three single-body smart metasurfaces is small, the three single-body smart metasurfaces can be supported only by the support platform 41. Specifically, in the folded state, the support platform 41 can serve as a support point on the right side of the three single-body smart metasurfaces 101 to fix the three single-body smart metasurfaces 101 in the shielding cover 31, as shown in FIG. Figure 4 As shown in A. In the process of switching from the folded state to the unfolded state, the support platform 41 can support the rotation of the three monomer intelligent metasurfaces, such as Figure 4B. In the unfolded state, the support platform 41 can serve as a support point for the small-area unfolding of the three single-body intelligent metasurfaces 101, as shown in FIG. Figure 4 As shown in C.

[0068] Figure 5 In the embodiment, considering that there are a large number of 5 monomer smart metasurfaces, the shielding outer cover 31 and the supporting gimbal 41 can jointly support the 5 monomer smart metasurfaces. Specifically, in the folded state, the first rotating shaft 32 of the shielding outer cover 31 and the supporting gimbal 41 can serve as support points on the left and right sides to fix the 5 superimposed and folded monomer smart metasurfaces 101 in the shielding outer cover 31. In the process of switching from the folded state to the unfolded state, the supporting gimbal 41 can support and drive the 3 monomer smart metasurfaces to rotate. In the unfolded state, the first rotating shaft 32 of the shielding outer cover 31 and the supporting gimbal 41 can jointly serve as support points for the large-area unfolding of the 5 monomer smart metasurfaces 101. Among them, Figure 5 For parts not shown in the figure, refer to Figure 3 and Figure 4 The description of the corresponding components in will not be repeated here.

[0069] As mentioned above, the supporting gimbal can be connected to the terminal surface through a U-shaped frame. In this case, optionally, taking into account the different thicknesses of different terminals, in order to adapt to the terminal thickness so as to fix the supporting gimbal on the terminal, an adjustment device can be set for the U-shaped frame. The adjustment device may include an adjusting nut and a telescopic cylinder. The width of the U-shaped frame can be adjusted through the adjusting nut and the telescopic cylinder to adapt to different terminal thicknesses.

[0070] Figure 6 It is a schematic diagram of an embodiment of the present application in which a supporting gimbal is fixed on a terminal surface via a U-shaped frame. Figure 6 In the embodiment, the support platform 41 is fixed on the terminal 11 through the U-shaped frame 60, and the intelligent metasurface accessory device 10 is fixed on the terminal 11 through the support platform 41. The U-shaped frame 60 includes a telescopic cylinder 61, an adjustment nut 62 and a tongue 63. When the support platform is fixed on the terminal 11 through the U-shaped frame, the adjustment nut can be adjusted according to the thickness of the terminal 11, and the telescopic cylinder cooperates with the U-shaped frame to extend and retract, so that the width of the U-shaped frame matches the thickness of the terminal.

[0071] In the embodiment of the present application, multiple single-body smart metasurfaces are connected, and multiple single-body smart metasurfaces can be connected in sequence through torsion spring hinges. Optionally, the torsion spring hinge can also be used to unfold or fold multiple single-body smart metasurfaces. Specifically, when the smart metasurface accessory device includes a supporting gimbal, the torsion spring hinge can be used to assist the supporting gimbal in unfolding or folding multiple single-body smart metasurfaces. Figure 4 and Figure 5 shown. Figure 4In the process, when the support and platform 41 control the three monomer intelligent metasurfaces to Figure 4 In the state shown in B, the torsion spring hinges 22 between the three single-body smart metasurfaces 101 can elastically drive the three single-body smart metasurfaces to form a single-layer flat state. Figure 5 In the process, when the support and platform 41 control the 5 monomer intelligent metasurfaces to Figure 5 In the state shown in A, the torsion spring hinges 22 between the five monomer smart metasurfaces 101 can elastically drive the five monomer smart metasurfaces to form a single-layer flat state.

[0072] Optionally, a third motor may be provided at the torsion spring hinge, so that when the multiple monomer smart metasurfaces are in the unfolded state, the third motor may be used to drive the torsion spring hinge to adjust the angles between the multiple monomer smart metasurfaces, so that the multiple monomer smart metasurfaces present different unfolded states. Figure 7 As shown, Figure 7 The two single-body smart metasurfaces 101 shown are connected by a torsion spring hinge, 221 is the torsion spring part of the torsion spring hinge, 222 is the hinge part of the torsion spring hinge, and a third motor 71 is provided at the torsion spring hinge, and the third motor 71 can drive the torsion spring hinge to adjust the angle between the two single-body smart metasurfaces to any angle. The third motor 71 can be powered and controlled by the smart metasurface accessory device, or can also be powered and controlled by the terminal.

[0073] As mentioned above, the unfolded state of multiple monomer smart super surfaces may include at least one of a single-layer tiled state, a single-layer non-tiled state, a semi-surround terminal state, and a fully-surround terminal state. In actual applications, considering that the terminal may be a terminal with a display screen, in order to avoid affecting the user's viewing of the content displayed on the terminal screen, optionally, when there is a monomer smart super surface corresponding to the front of the terminal screen, the monomer smart super surface may be set to a transparent state. For example, in the case of multiple monomer smart super surfaces semi-surrounding or fully-surrounding terminals, there is a high probability that the front of the terminal screen will cover one or more monomer smart super surfaces. Then, setting the one or more monomer smart super surfaces to a transparent state may not affect the user's viewing of the screen content.

[0074] In addition, in the application scenario where the terminal performs millimeter wave high-frequency communication, the communication performance of the terminal is severely reduced due to the obstruction of the middle frame on the front direction of the terminal screen. At this time, if multiple single-body intelligent metasurfaces are semi-surrounded or fully surrounded to the front of the terminal screen, and the single-body intelligent metasurface corresponding to the front of the screen is transparent, then the communication capability of the front of the screen can be enhanced without affecting the user's viewing of the screen content.

[0075] Optionally, considering that the sizes of different terminals may be different, when multiple single-body intelligent supersurfaces surround or semi-surround the terminal, the single-body intelligent supersurface may not fit the outer surface of the terminal, resulting in a larger occupied space. Therefore, at least one of the multiple single-body intelligent supersurfaces can be set as a retractable single-body intelligent supersurface. In this way, when multiple single-body intelligent supersurfaces semi-surround the terminal or fully surround the terminal, the retractable single-body intelligent supersurface can be used to control the fit of multiple single-body intelligent supersurfaces with the outer surface of the terminal.

[0076] like Figure 8 shown. Figure 8 Take the example of a smart metasurface accessory device including five single-body smart metasurfaces. Figure 8 In A, the five single intelligent metasurfaces 101 are in a state of fully surrounding the terminal 11. Figure 8 It can be seen from A that the five single-unit smart supersurfaces and the outer surface of the terminal 11 are not in close contact, and there is a movable gap in the middle. In this case, some of the five single-unit smart supersurfaces can be set as retractable single-unit smart supersurfaces. Figure 8 As shown in B, two of the five single-body intelligent metasurfaces can be set as retractable single-body intelligent metasurfaces 81. By shrinking these two single-body intelligent metasurfaces 81, the five single-body intelligent metasurfaces can be fitted with the outer surface of the terminal 11 in the case of a fully surround terminal.

[0077] Optionally, the metasurface accessory device in the embodiment of the present application may further include a control circuit board. The control circuit board may be provided with at least one of a controller, a memory, a communication module, a battery, and a power management module. Among them, the controller may be a single-chip microcomputer controller, which can be used to control the electromagnetic units of multiple monomer smart metasurfaces to communicate and control the power supply of the motor. The motor here may include the first motor for driving the first rotating shaft at the shielding cover, the second motor for driving the second rotating shaft at the support gimbal, and the third motor provided at the torsion spring hinge. When the motor is powered, the controller can control the folding or unfolding of multiple monomer smart metasurfaces. The memory can be used to store the control program of the controller, which includes the control program for the above-mentioned first motor, the second motor, and the third motor, as well as the control program for folding and unfolding multiple monomer smart metasurfaces. The communication module can be used for short-range communication between the controller and the terminal. The short-range communication can be the transmission of data or instructions between the terminal and the controller. The communication methods include at least two types: one is wireless communication such as Bluetooth, Ultra Wide Band (UWB), Wireless Fidelity (WIFI), and the other is wired communication such as USB OTG (On the Go, a data communication protocol). The battery can be used to power the intelligent metasurface accessory device, and can also be used to power the first motor, the second motor, and the third motor. The power management module is used to control the charging and discharging of the battery through the controller. The charging source can be a separate mains power supply or can be powered by the terminal's Universal Serial Bus (USB). When charging, it can be achieved through USB or a dedicated charging port. The battery power management module can be connected to the terminal, and the connection method can include electrical connection, etc.

[0078] Optionally, when the intelligent metasurface accessory device is connected to the terminal via a supporting gimbal, the control circuit board may be arranged in the supporting gimbal. Fig. 9 . Fig. 9In the figure, a control circuit board 90 is provided inside the supporting gimbal 41, and the control circuit board 90 includes a controller 91, a communication module 92, a battery 93, a power management module 94 and a memory 95. The controller 91 is electrically and wirelessly connected to the intelligent metasurface accessory device 10, and can control the communication between the electromagnetic units of multiple monomer intelligent metasurfaces in the intelligent metasurface accessory device 10. In addition, it can also control the power supply of each motor in the intelligent metasurface accessory device 10. The controller 91 can also be connected to the communication module 92 and the memory 95 to control the communication between the communication module 92 and the terminal, and the storage of the control program in the memory 95. The power management module 94 is connected to the battery 93 and the controller 91, and the charging and discharging of the battery 93 can be controlled by the controller 91. In addition, the power management module 94 can also be electrically connected to the terminal ( Fig. 9 not shown). Fig. 9 The connection between the components shown in the figure may be an electrical connection, or a wireless or wired connection, etc.

[0079] As mentioned above, the multiple monomer intelligent super surfaces in the embodiment of the present application include a multi-layer superimposed folded state, a single-layer tiled state, a single-layer non-tiled state, a semi-surrounded terminal state, and a fully surrounded terminal state, and the multiple monomer intelligent super surfaces can be flexibly switched between these multiple states. In this way, in different states of multiple monomer intelligent super surfaces, in order to meet the communication needs of the terminal in different communication environments, it is necessary for multiple monomer intelligent super surfaces to be multifunctional, that is, multiple monomer intelligent super surfaces are required to have both transmission and reflection functions. In other words, the multiple monomer intelligent super surfaces in the embodiment of the present application need to adopt a simultaneously transmitting and reflecting intelligent super surface (Simultaneously Transmitting and Reflecting Reconfigurable IntelligentSurface, STAR-RIS) or an omnidirectional intelligent super surface (Intelligent Omni-Surface, IOS) with transmission and reflection functions. In this way, in different communication environments, by controlling the retraction or expansion of multiple single intelligent metasurfaces, and simultaneously controlling multiple single intelligent metasurfaces to correspond to the transmission function or the reflection function or to correspond to the transmission function and the reflection function at the same time, the communication needs of the terminal in different communication environments can be met, and flexible applications can be achieved in complex scenarios with ever-changing wireless communications.

[0080] Optionally, in the retracted state, multiple monomer smart metasurfaces can correspond to the transmission function, that is, multiple monomer smart metasurfaces need to work in the transmission state at the same time in the retracted state to assist the terminal in uplink enhancement. This is because it is meaningless for multiple monomer smart metasurfaces to work in the reflection state at the same time in the retracted state. Specifically, in the retracted state, if downlink communication is performed, the initial gain of the far-field signal is small due to the small area of ​​the outer smart metasurface, and the noise introduced by the propagation environment of the far-field signal will be further amplified in the process of penetrating the multi-layer smart metasurface, resulting in the inability to effectively perform downlink enhancement. In addition, when the multi-layer smart metasurface works in the reflection state at the same time, it will also seriously block the terminal uplink signal from penetrating the multi-layer smart metasurface, and since only the reflection of the outermost smart metasurface is effective, the gain reflected by the smart metasurface to other surrounding terminals is also very limited, resulting in the inability to effectively perform downlink enhancement. When multiple monomer smart metasurfaces work in the transmission state at the same time, since the transmission has little effect on the original noise and multiple monomer smart metasurfaces are covered with shielding covers, the amplitude can be adjusted based on the phase modulation of the near-field signal, so the uplink enhancement can be effectively achieved. It can be seen that in the retracted state, multiple monomer smart metasurfaces need to correspond to the transmission function to perform uplink enhancement.

[0081] Optionally, in the unfolded state, since the unfolding modes of multiple monomer smart metasurfaces include at least one of single-layer tiling, single-layer non-tiling, semi-surround terminals, and fully-surround terminals, and at least one of the peripheral terminals used to assist the terminal and the terminal for uplink communication and / or downlink communication, multiple monomer smart metasurfaces can flexibly correspond to reflection functions and / or transmission functions. Specifically, multiple monomer smart metasurfaces can have at least one working mode in the unfolded state, and the at least one working mode can include at least one of energy sharing, mode switching, and time switching. Among them, for any monomer smart metasurface, energy sharing characterizes that all electromagnetic units in the monomer smart metasurface correspond to both transmission functions and reflection functions, that is, all electromagnetic units in the monomer smart metasurface can be both transmitted and reflected. Mode switching characterizes that some electromagnetic units in the monomer smart metasurface correspond to the transmission function, and some electromagnetic units correspond to the reflection function, that is, the electromagnetic units in the monomer smart metasurface either work in transmission or in reflection. Time switching characterizes that all electromagnetic units in a single intelligent metasurface correspond to transmission and reflection functions in a time-sharing manner, that is, all electromagnetic units in a single intelligent metasurface work in reflection in the first time period and in transmission in the second time period, or work in transmission in the first time period and in reflection in the second time period in each time period, and the first time period and the second time period add up to one time period. Among them, in the unfolded state, the transmission function of the intelligent metasurface can serve the uplink enhancement of the terminal, and the reflection function can serve the downlink enhancement of the surrounding terminals. When serving the downlink enhancement of the surrounding terminals, the intelligent metasurface can be not limited to assisting downlink communication, but can also be used for energy transmission, perception functions, etc.

[0082] In order to understand the working mode of the single intelligent metasurface in the unfolded state, namely energy sharing, mode switching and time switching, please refer to Fig.10 . Fig.10 FIG. 1 is a schematic diagram of an embodiment of the present application communicating based on STAR-RIS. Fig.10 It can be seen that the signal s incident to STAR-RIS from the base station n (n represents the number of electromagnetic units incident on STAR-RIS) will reach Terminal 1 and Terminal 2 through reflection and transmission respectively. The incident channel is g and the reflected channel is f r , the transmission channel is f t , the base station also has direct channels d from terminal 1 and terminal 2 respectively r and direct channel d t In this case, the reflected signal received by terminal 1 and the transmitted signal received by terminal 2 can be expressed as:

[0083]

[0084]

[0085] Among them, the transmission and reflection amplitude distribution coefficients of the incident signal are Phase shift coefficient of incident signal Unlike conventional RIS that only adjusts the phase shift, STAR-RIS also requires amplitude adjustment. Therefore, when there is no loss in transmission or reflection of each electromagnetic unit,

[0086] Furthermore, under the premise that the impedance of the electromagnetic unit is zero, This means that the phase shift coefficients for transmission and reflection are paired and satisfy:

[0087] Based on the above signal model, STAR-RIS can have three working modes: energy sharing, mode switching and time switching.

[0088] 1. Energy Splitting (ES).

[0089] In this mode, all electromagnetic units work in transmission and reflection, and the transmission and reflection coefficient matrices are:

[0090]

[0091]

[0092]

[0093] 2. Mode switching (Mode Switching, MS).

[0094] In this mode, some of the electromagnetic units work in transmission, and some work in reflection. The transmission and reflection coefficient matrices are (M t is the number of electromagnetic units working in transmission, M r The number of electromagnetic units working in reflection, M t +M r =M, M≤n, MS is equivalent to a special case of ES):

[0095]

[0096]

[0097]

[0098] 3. Time Switching (TS)

[0099] In this mode, all electromagnetic units work in transmission or reflection in time-sharing mode, and the transmission and reflection coefficient matrices are:

[0100]

[0101]

[0102] T is the period of time-sharing work.

[0103] Based on the intelligent metasurface accessory device provided in the embodiment of the present application, for a communication terminal, after the terminal is fixedly connected to the intelligent metasurface accessory device or connected in a detachable manner, in the folded state, all monomer intelligent metasurfaces need to be configured as transmission functions and used for uplink enhancement, which is suitable for scenarios where the terminal is in a strong signal area. Because the multi-layer monomer intelligent metasurface can adjust the amplitude while adjusting the phase, power enhancement can be achieved, and the power consumption of the enhancement degree is much lower than the transmission power consumption of the terminal's own RF chain under the same circumstances. Whether it is used for fixed terminals such as CPE or mobile terminals such as mobile phones, significant energy-saving effects can be achieved. In the unfolded state, the unfolded forms of multiple monomer intelligent metasurfaces can be various, such as a single-layer flat state, a single-layer non-flat state, a semi-surround terminal or a fully surrounded terminal. At this time, the multiple monomer intelligent metasurfaces can be a certain monomer intelligent metasurface configured as uplink, and the other several configured as downlink. In this way, when the terminal is in a weak signal area or a strong interference area in the neighboring area, both downlink enhancement and uplink enhancement can be performed, and the overall enhanced power consumption of the metasurface will be much lower than the power consumption of the terminal itself. Of course, in the unfolded state, multiple single-body intelligent metasurfaces can also be configured for uplink and downlink at the same time, or used for uplink and downlink in time-sharing, so as to achieve flexible application in complex scenarios with ever-changing wireless communications.

[0104] To summarize, the smart metasurface accessory device provided in the embodiment of the present application can be fixedly connected to the terminal or connected in a detachable manner, and the accessory device includes a plurality of connected single-unit smart metasurfaces, and the plurality of single-unit smart metasurfaces have two states: folded and unfolded. In the folded state, the accessory device can be used to assist the terminal in uplink communication, and in the unfolded state, the accessory device can be used to assist the terminal and at least one of its surrounding terminals in uplink communication and / or downlink communication. Therefore, when the terminal has communication needs, the plurality of single-unit smart metasurfaces can be folded to assist the terminal in uplink enhancement, and the plurality of single-unit smart metasurfaces can be unfolded to assist the terminal and at least one of its surrounding terminals in uplink enhancement and / or downlink enhancement, thereby improving the communication environment and state of the terminal and / or surrounding terminals and meeting the communication needs of the terminal and / or surrounding terminals. In addition, since multiple single-body intelligent metasurfaces can assist the terminal in uplink communication when in a folded state, the RF chain transmission power of the terminal can be effectively reduced and the terminal power consumption can be saved. Since multiple single-body intelligent metasurfaces can assist the terminal and / or at least one of the surrounding terminals in uplink enhancement and / or downlink enhancement when in an unfolded state, the terminal's uplink and / or downlink transmission requirements for itself and the surrounding terminals can be met, thereby achieving flexible application in complex scenarios with ever-changing wireless communications.

[0105] Based on the intelligent metasurface accessory device provided in the embodiment of the present application, the embodiment of the present application also provides a terminal communication method, which is applied to a terminal, and the terminal is fixedly connected to the intelligent metasurface accessory device or connected in a detachable manner. For details, please refer to Fig.11 The embodiment shown.

[0106] Fig.11 It is a flowchart of a terminal communication method according to an embodiment of the present application. Fig.11 The illustrated embodiment includes the following steps.

[0107] S112: Acquire communication quality parameters of the terminal.

[0108] When communicating, the terminal can obtain its own communication quality parameters. The communication quality parameters may be parameters related to the communication quality of the terminal. Optionally, the communication quality parameters may include the received signal quality parameters of the terminal, the uplink and downlink signal strengths, the signal strength received by the front of the terminal display screen (if any), etc. Among them, the received signal quality parameters of the terminal may include but are not limited to at least one of the following:

[0109] Reference Signal Receiving Power (RSRP);

[0110] Received Signal Strength Indicator (RSSI);

[0111] Reference Signal Receiving Quality (RSRQ);

[0112] Signal to Interference plus Noise Ratio (SINR);

[0113] Carrier to Interference plus Noise Ratio (CINR).

[0114] S114: Determine the working state of the plurality of monomer smart metasurfaces according to the communication quality parameters of the terminal, where the working state is a folded state or an unfolded state.

[0115] After obtaining its own communication quality parameters, the terminal can determine whether to perform uplink enhancement or downlink enhancement according to the communication quality parameters, and then determine the working state of multiple monomer smart metasurfaces in the smart metasurface accessory device, which working state includes a folded state or an expanded state. For example, if the terminal determines that uplink enhancement is required, the working state of multiple monomer smart metasurfaces can be determined to be a folded state; if the terminal determines that both uplink enhancement and downlink enhancement are required, the working state of multiple monomer smart metasurfaces can be determined to be an expanded state.

[0116] Optionally, in one implementation, the terminal determines the working states of multiple single-unit smart metasurfaces according to its own communication quality parameters, which may include:

[0117] When the communication quality parameter of the terminal is greater than or equal to the preset quality parameter value, determining that the working state of the individual intelligent metasurface is a collapsed state; or,

[0118] When the communication quality parameter of the terminal is less than the preset quality parameter value, the working state of the individual intelligent metasurface is determined to be the unfolded state.

[0119] The preset quality parameter value can be set according to actual communication needs, and is not specifically limited here. The communication quality parameter of the terminal is greater than or equal to the preset quality parameter value, which can be that the communication quality parameter of the terminal is continuously greater than or equal to the preset quality parameter value within a certain time period (which can be set according to actual communication needs). When it is continuously greater than or equal to the preset quality parameter value, it can be determined that the terminal is currently in a strong signal area, and the terminal can perform uplink enhancement to reduce its own RF chain power consumption. At this time, it can be determined that the working state of multiple monomer smart metasurfaces is a retracted state, that is, multiple monomer smart metasurfaces need to be retracted.

[0120] The communication quality parameter of the terminal is less than the preset quality parameter value, which may be that the communication quality parameter of the terminal is continuously lower than the preset quality parameter value within a certain period of time (which may also be set according to actual communication needs). In the case where the communication quality parameter is continuously lower than the preset quality parameter value, it can be determined that the terminal is currently in a weak signal area, and the terminal needs to perform downlink enhancement, or uplink enhancement and downlink enhancement at the same time. At this time, it can be determined that the working state of multiple monomer smart metasurfaces is the unfolded state, that is, multiple monomer smart metasurfaces need to be unfolded.

[0121] Optionally, when the terminal is a mobile terminal or a fixed terminal that is sensitive to power consumption, when determining the working states of multiple single-body intelligent metasurfaces, the working states of multiple single-body intelligent metasurfaces can also be determined in combination with the power consumption of the terminal itself. For example, if the terminal is short of power and is in a strong signal area, the working state can be determined as a folded state and used for uplink enhancement to compensate for the terminal's RF chain transmission power and reduce terminal power consumption. For another example, if the terminal is short of power and is in a weak signal area, the working state can be determined as an expanded state and used for both uplink enhancement and downlink enhancement. In this way, while compensating for the terminal's RF chain transmission power to reduce terminal power consumption, the downlink communication quality can also be improved. For another example, if the terminal has sufficient power and is in a weak signal area, the working state can be determined as an expanded state and used for downlink enhancement, without the need for uplink enhancement.

[0122] Optionally, when determining the working status of multiple monomer smart super surfaces, the terminal can also obtain information about the smart super surface accessory device, and jointly determine the working status of multiple monomer smart super surfaces based on this information and the communication quality parameters of the terminal itself. Specifically, when the smart super surface accessory device is fixedly connected to the terminal or connected in a detachable manner, the smart super surface accessory device and the terminal can communicate wirelessly through the short-range communication modules of both parties or communicate wired through USB OTG. During communication, the smart super surface accessory device can send information such as the number and material status of the monomer smart super surfaces it includes (such as whether the super surface is a transparent super surface, etc.) to the terminal, and the terminal can obtain information about the smart super surface accessory device. After that, the terminal can jointly determine the working status of multiple monomer smart super surfaces based on the acquired information and its own communication quality parameters. It should be noted that the communication quality parameters of the terminal itself can be used as the main method, and the information of the smart super surface accessory device can be used as the auxiliary method to determine the working status of multiple monomer smart super surfaces. The specific implementation method is not described in detail here.

[0123] Optionally, when determining the working status of multiple single-unit smart metasurfaces, the terminal may also perform at least one of the following (1) to (4):

[0124] (1) When the working state is the folded state, the RF chain transmission power of the terminal is reduced.

[0125] In the collapsed state, since multiple single-unit intelligent metasurfaces are used for uplink enhancement, part of the uplink transmission power can be compensated. Therefore, the terminal can appropriately reduce its own RF chain transmission power to reduce RF chain power consumption. For mobile terminals, after reducing their own video chain transmission power, the battery life of the terminal can be extended.

[0126] (2) When the working state is the expanded state, the RF chain transmission power of the terminal is maintained or increased according to the dynamic value of the communication quality parameter of the terminal.

[0127] In the unfolded state, since multiple monomer smart metasurfaces can be used for uplink enhancement and / or downlink enhancement, the terminal can maintain or increase its own RF chain transmission power according to the dynamic value of the communication quality parameter after the actual uplink enhancement and / or downlink enhancement. For example, if multiple monomer smart metasurfaces are used for downlink enhancement in the unfolded state but not for uplink enhancement, the uplink transmission power cannot be compensated. At this time, if the RF chain transmission power of the terminal is low, in order to ensure the stability of uplink communication, the terminal can increase its own RF chain transmission power. For another example, if multiple monomer smart metasurfaces are used for uplink enhancement and downlink enhancement at the same time in the unfolded state, the uplink enhancement can appropriately compensate for the uplink transmission power. Then, the terminal can maintain its own RF chain transmission power.

[0128] (3) Determine the configuration information of multiple monomer smart metasurfaces according to the working status.

[0129] When the working state is the folded state, the configuration information may include the corresponding transmission functions of multiple monomer smart metasurfaces, that is, the multiple monomer smart metasurfaces need to work in the transmission state. When the working state is the unfolded state, the configuration information may include at least one of the working modes of multiple monomer smart metasurfaces, the monomer smart metasurfaces corresponding to different working modes, the unfolding mode, the unfolding angle, and the covering direction.

[0130] The working modes of multiple monomer smart metasurfaces include at least one of the energy sharing, mode switching and time switching recorded above. Specifically, in the unfolded state, the working modes of multiple monomer smart metasurfaces can be: all energy sharing, or all mode switching, or all time switching, or part of the energy sharing and the rest of the mode switching, or part of the energy sharing and the rest of the time switching, or part of the mode switching and the rest of the time switching, or part of the energy sharing, part of the mode switching and the rest of the time switching. Among them, if the working modes of multiple monomer smart metasurfaces include at least two, it is necessary to further determine which monomer smart metasurfaces correspond to each working mode. For example, if some of the multiple monomer smart metasurfaces are mode switching and some are time switching, it is necessary to further determine which monomer smart metasurfaces correspond to mode switching and which monomer smart metasurfaces correspond to time switching.

[0131] The deployment mode includes at least one of single-layer tiling, single-layer non-tiling, semi-surround terminal and full-surround terminal. The deployment angle can be the angle between multiple monomer smart super surfaces, or it can also be the angle between multiple monomer smart super surfaces and the terminal. The coverage direction can be the direction in which multiple monomer smart super surfaces cover the terminal, for example, covering the front of the terminal screen or covering the side of the terminal.

[0132] When determining the above configuration information, the terminal can make a comprehensive determination based on its own communication status and the information of the smart metasurface accessory device, which will not be described in detail here. In addition, after determining the working status, the terminal can also confirm the power supply and power distribution with the smart metasurface accessory device.

[0133] (4) When the working state is the expanded state, if an uplink enhancement request and / or a downlink enhancement request is received, the configuration information of the multiple single-body smart metasurfaces is adjusted according to the communication quality parameters and power consumption status of the terminal.

[0134] The uplink enhancement request may include an uplink enhancement request from a base station and / or a surrounding terminal, and the uplink enhancement request may be used by the base station and / or the surrounding terminal to request the terminal to perform uplink enhancement through the intelligent metasurface accessory device. The downlink enhancement request may include a downlink enhancement request from a base station and / or a surrounding terminal, and the downlink enhancement request may be used by the base station and / or the surrounding terminal to request the terminal to perform downlink enhancement through the intelligent metasurface accessory device.

[0135] For the terminal, when it is determined that the working state of multiple monomer smart super surfaces is the unfolded state, if an uplink enhancement request and / or a downlink enhancement request is received, it can communicate with the requester (base station and / or surrounding terminal) to confirm whether the requester does have the need for uplink and / or downlink enhancement. If so, the terminal can assist the requester in uplink and / or downlink enhancement through multiple monomer smart super surfaces. When the terminal assists the requester in uplink and / or downlink enhancement through multiple monomer smart super surfaces, the configuration information of the multiple monomer smart super surfaces can be adjusted so that the multiple monomer smart super surfaces after adjusting the configuration information can assist the requester in uplink and / or downlink communication. Among them, the configuration information of multiple monomer smart super surfaces may include at least one of the working modes of multiple monomer smart super surfaces, the monomer smart super surfaces corresponding to different working modes, the unfolding mode, the unfolding angle, and the coverage direction. For details, please refer to the relevant description of the configuration information in the above item (3), which will not be repeated here. When the terminal adjusts the configuration information of multiple single intelligent metasurfaces, it can make adjustments based on the communication quality parameters and power consumption status of the terminal itself. The specific implementation method of adjusting the configuration information will not be described in detail here.

[0136] It should be noted that when the terminal determines the working state of multiple single intelligent metasurfaces, the terminal considers the communication quality parameters of the terminal itself, but does not consider the communication conditions of the surrounding terminals. The reason is that the intelligent metasurface accessory device is connected to the terminal. When the terminal performs auxiliary communication through the intelligent metasurface accessory device, the priority of assisting the terminal itself to communicate is higher than the priority of assisting the surrounding terminals to communicate. Therefore, when determining the working state, the terminal's own communication quality parameters are given priority, and the communication conditions of the surrounding terminals are not considered. After determining the working state, in order to meet the communication needs of the surrounding terminals, the terminal can take the communication conditions of the surrounding terminals into consideration when the working state is the unfolded state, that is, when receiving the uplink enhancement request and / or downlink enhancement request sent by at least one of the base station and the surrounding terminals, the configuration information of the multiple single intelligent metasurfaces can be adjusted to assist the surrounding terminals in uplink and / or downlink communication to meet the communication needs of the surrounding terminals.

[0137] It should also be noted that when the working state of multiple single-body intelligent metasurfaces is the unfolded state, the uplink enhancement request and / or downlink enhancement request received by the terminal from the base station can be divided into two situations. The first situation is that the base station evaluates the surrounding terminals based on the information including communication quality parameters reported by the surrounding terminals and proposes to the terminal. The second situation is that the base station proposes to the terminal dynamically based on the cell communication environment. The first situation is equivalent to the base station conveying the uplink enhancement and / or downlink enhancement requirements of the surrounding terminals to the terminal. At this time, the surrounding terminals usually do not have D2D functions and cannot directly send request information to the terminal like the surrounding terminals with D2D functions.

[0138] Optionally, after determining the working status and configuration information of multiple monomer smart metasurfaces (when the working state is the expanded state, if no uplink enhancement request and / or downlink enhancement request is received, the configuration information may be the configuration information determined in the above item (3); if an uplink enhancement request and / or downlink enhancement request is received, the configuration information may be the configuration information adjusted in the above item (4)), the terminal may also send notification information to the smart metasurface accessory device. The notification information may include the working status and / or configuration information of multiple monomer smart metasurfaces. The notification information may be used by the smart metasurface accessory device to adjust the working status and / or configuration of multiple monomer smart metasurfaces. When the terminal sends notification information to the smart metasurface accessory device, it may perform wireless or wired transmission through the short-range communication modules of both parties.

[0139] For the smart supersurface accessory device, after receiving the notification information sent by the terminal, it can collapse or expand multiple monomer smart supersurfaces according to the working status in the notification information, and / or configure multiple monomer smart supersurfaces according to the configuration information in the notification information. Taking the notification information including the working status and configuration information as an example, if the working status is the collapsed state, and the configuration information is that the multiple monomer smart supersurfaces correspond to the transmission function, then the smart supersurface accessory device can control the collapse of multiple monomer smart supersurfaces, and configure the multiple monomer smart supersurfaces to the transmission function at the same time. If the working status is the expanded state, and the configuration information is that the working modes of the multiple monomer smart supersurfaces are all energy sharing and the expansion mode is a single-layer flat state, then the smart supersurface accessory device can control the expansion of multiple monomer smart supersurfaces to a single-layer flat state, and configure all the multiple monomer smart supersurfaces to correspond to the emission function and the transmission function at the same time. Among them, the specific implementation method of the smart supersurface accessory device controlling the collapse or expansion of multiple monomer smart supersurfaces can be referred to the above Figures 1 to 9 The corresponding descriptions in the illustrated embodiments will not be described in detail here.

[0140] Optionally, when determining the working status and configuration information of multiple single intelligent metasurfaces, the terminal may also perform the following operations:

[0141] Sending channel state information, working states and / or configuration information of multiple monomer smart metasurfaces to a base station;

[0142] Receiving configuration data of multiple single-body smart metasurfaces from a base station, where the configuration data is obtained by the base station after performing channel estimation and beamforming according to channel state information, working states and / or configuration information of the multiple single-body smart metasurfaces;

[0143] Parameters of multiple monomer smart metasurfaces are configured according to the configuration data.

[0144] Since multiple monomer smart metasurfaces include a folded state and an unfolded state, in the unfolded state, multiple monomer smart metasurfaces include multiple unfolding modes, and different unfolding modes can correspond to different unfolding angles and coverage directions, and multiple monomer smart metasurfaces can include at least one working mode of energy sharing, mode switching and time switching, which makes the switching of multiple monomer smart metasurfaces more complicated. Therefore, in order to facilitate the base station to perform channel estimation and beamforming, the terminal needs to send the working state and configuration information of multiple monomer smart metasurfaces to the base station. In addition, the terminal can also send channel state information to the base station so that the base station can perform channel estimation and beamforming based on the channel state information (Channel State Information, CSI). The CSI information can be measured by the terminal according to the reference channel state information (Channel State Information-Reference Signal, CSI-RS) of the base station downlink, and the CSI information may include rank indication (rank indication, RI), precoding matrix indication (Precoding Matrix Indicator, PMI), channel quality indication (Channel Quality Indicator, CQI), etc.

[0145] For the base station, after receiving the CSI information, working status and / or configuration information sent by the terminal, the base station can perform channel estimation and beamforming based on this information, thereby obtaining configuration data for multiple monomer smart metasurfaces in the smart metasurface accessory device.

[0146] Compared with the single user in the collapsed state (i.e. the terminal itself), the expanded state is a random channel multi-user (i.e. the terminal itself and the surrounding terminals). In the collapsed state, the base station and the smart metasurface accessory device are low-dimensional and slow-changing, while in the expanded state, the base station and the smart metasurface accessory device are high-dimensional and slow-changing. However, after multiple users are connected in the expanded state, the smart metasurface accessory device and the terminal will show low-dimensional and fast-changing. In addition, in the expanded state, due to the introduction of multi-user multi-beam, there are dual time scales, i.e., the base station and the smart metasurface accessory device are large time scales, and the smart metasurface accessory device and the terminal are small time scales.

[0147] Before the base station performs beamforming on the smart metasurface attachment device for uplink and / or downlink enhancement, it is necessary to perform channel estimation. Since the smart metasurface generally lacks signal processing capabilities, the terminal, as an active attached communication carrier of the smart metasurface attachment device, can perform necessary communication handshakes with the base station to reduce the difficulty of the base station's passive beamforming on the smart metasurface.

[0148] Since the uplink of the intelligent metasurface accessory device relative to the base station is low-dimensional and slow-changing, and the downlink is high-dimensional and slow-changing, the base station can use the beam configured based on the CSI feedback information when the terminal switches uplink and downlink as the instantaneous CSI of the known channel state, and adjust the transmitted signal and optimize the received signal according to the known channel, which is essentially equivalent to transmission adaptation before the existing uplink channel becomes outdated.

[0149] When the intelligent metasurface accessory device switches from the folded state to the unfolded state, the intelligent metasurface accessory device changes from the multi-layer superposition state to the single-layer flat state, the single-layer non-flat state, the semi-surround or full-surround terminal state, and the channel changes. The channel model can be based on the SV model of the uniform planar array (UPA) (Salen and Valenzula proposed in 1972) or the 3GPP TS 36.879 model, which has a dual time scale. The high-dimensional slow-changing large-time scale CSI between the intelligent metasurface accessory device and the base station needs to be recalculated according to the compressed sensing method based on the number of electromagnetic units facing the base station in the unfolded state. The small-time scale CSI requires beam training of the low-dimensional fast-changing fading distribution, spatial correlation, etc. of the intelligent metasurface accessory device and the terminal, and is obtained through statistical methods including artificial intelligence (AI) and / or machine learning (ML). After the base station performs channel estimation, it can perform joint beamforming for the intelligent metasurface accessory device based on the channel estimation result.

[0150] When the smart metasurface accessory device switches from the unfolded state to the folded state, multiple users become single users, and the single-layer large-area smart metasurface is changed to a multi-layer small-area smart metasurface. The switching stage is still based on the instantaneous CSI. After the switching is completed, the base station can re-estimate the channel based on the SV channel model of the uniform linear array (ULA) and the CSI information fed back by the terminal. For fixed terminals, the channels between the terminal-smart metasurface and the smart metasurface-base station are quasi-static low-dimensional channels and do not require frequent estimation. For mobile terminals, the terminal-smart metasurface is a static low-dimensional channel and does not require frequent estimation, but the channel between the smart metasurface and the base station is a dynamic high-dimensional channel and requires frequent estimation. But in general, they are all slow-changing and can use instantaneous CSI. Based on the multi-level CSI from the terminal obtained by channel estimation, the base station can perform joint beamforming for the smart metasurface accessory device.

[0151] Optionally, some electromagnetic units in the smart metasurface can be designed as active electromagnetic units, which allows the base station to add active beamforming factors to the smart metasurface accessory devices, overcome the multiplicative fading of the cascaded channels, and make the beamforming more precise.

[0152] After beamforming, the base station can obtain configuration data for multiple monomer smart metasurfaces. The configuration data includes carrier frequency, phase, amplitude, etc. Among them, when the working state of multiple monomer smart metasurfaces is the unfolded state and the smart metasurface accessory device is used to assist the terminal and / or the surrounding terminal to perform downlink communication, the configuration data of multiple monomer smart metasurfaces can be determined according to the signal to noise ratio of the terminal received signal. The signal to noise ratio of the terminal received signal can be determined based on the downlink signal, downlink interference signal and downlink noise signal received by the terminal. The downlink signal can be determined based on the downlink communication parameters of the terminal, and the downlink communication parameters of the terminal may include the receiving combination vector of the terminal, the downlink beamforming vector of the base station, the downlink channel coefficient between the terminal and the base station, the downlink channel coefficient between the terminal and multiple monomer smart metasurfaces, the downlink channel coefficient between the base station and multiple monomer smart metasurfaces, and the downlink phase shift and amplitude shift coefficients of multiple monomer smart metasurfaces corresponding to the working mode. The downlink interference signal can be determined according to the downlink communication parameters of the surrounding terminals, which may include the receiving combination vector of the surrounding terminals, the downlink beamforming vector of the base station, the downlink channel coefficient between the surrounding terminals and the base station, the downlink channel coefficient between the surrounding terminals and multiple monomer smart metasurfaces, the downlink channel coefficient between the base station and multiple monomer smart metasurfaces, and the downlink phase shift and amplitude shift coefficients of multiple monomer smart metasurfaces corresponding to the working mode. The downlink noise signal is a complex Gaussian distribution.

[0153] When the working state of multiple monomer smart metasurfaces is the unfolded state and the smart metasurface accessory device is used to assist the terminal and / or the peripheral terminal in uplink communication, the configuration data of the multiple monomer smart metasurfaces can be determined according to the signal to interference noise ratio of the base station received signal. The signal to interference noise ratio of the base station received signal can be determined according to the uplink signal, uplink interference signal and uplink noise signal received by the base station. The uplink signal can be determined according to the uplink communication parameters of the terminal, and the uplink communication parameters of the terminal may include the receiving combination vector of the base station, the uplink beamforming vector of the terminal, the uplink channel coefficient between the terminal and the base station, the uplink channel coefficient between the terminal and multiple monomer smart metasurfaces, the uplink channel coefficient between the base station and multiple monomer smart metasurfaces, and the uplink phase shift and amplitude shift coefficients of multiple monomer smart metasurfaces corresponding to the working mode. The uplink interference signal can be determined according to the uplink communication parameters of the surrounding terminals, which may include the receiving combination vector of the base station, the uplink beamforming vector of the surrounding terminal, the uplink channel coefficient between the surrounding terminal and the base station, the uplink channel coefficient between the surrounding terminal and multiple monomer smart metasurfaces, the uplink channel coefficient between the base station and multiple monomer smart metasurfaces, and the uplink phase shift and amplitude shift coefficients of multiple monomer smart metasurfaces corresponding to the working mode. The uplink noise signal is a complex Gaussian distribution.

[0154] After obtaining the configuration data, the base station can send the configuration data to the terminal. After receiving the configuration data, the terminal can perform parameter configuration on multiple monomer smart metasurfaces according to the configuration data. Among them, when the terminal performs parameter configuration on multiple monomer smart metasurfaces according to the configuration data, the configuration data can be sent to the smart metasurface accessory device first, and then the smart metasurface accessory device performs parameter configuration on multiple monomer smart metasurfaces according to the configuration data. It should be noted that the reason why the configuration data is sent to the smart metasurface accessory device through the terminal here is that the smart metasurface accessory device only has a short-range communication module, and it cannot communicate with the base station. Therefore, in order to avoid the base station's full-blind passive beamforming of the smart metasurface accessory Zhang Zhi resulting in poor channel accuracy, the base station needs to inform the terminal of the configuration data of multiple monomer smart metasurfaces, and then the terminal transmits the configuration data to the smart metasurface accessory device, and finally the single-chip microcomputer controller of the smart metasurface accessory executes the configuration change of the smart metasurface. After completing the parameter configuration of multiple monomer smart metasurfaces, multiple monomer smart metasurfaces can prepare for data transmission to achieve uplink enhancement, or downlink enhancement, or both uplink enhancement and downlink enhancement.

[0155] The smart metasurface accessory device provided in the embodiment of the present application is used in the default state (i.e., the folded state) to assist uplink enhancement mainly to reduce terminal power consumption, because the beamforming effect obtained from the smart metasurface is different in strong signal scenarios such as the cell center and the cell edge or other weak signal scenarios: in the cell center, the base station signal strength is relatively high, and a high-rank channel propagating as a rich scattering path can obtain a higher multiple-input multiple-output (MIMO) multiplexing gain. At this time, obtaining signals from low-rank smart metasurface channels will cause the MIMO multiplexing gain of the communication terminal to drop significantly; at the cell edge or when the base station signal is blocked or the neighboring area is seriously interfered with, the base station signal strength is relatively low, and good array gain can be obtained through smart metasurface-assisted communication. Therefore, after the intelligent metasurface accessory device provided in the embodiment of the present application is connected to the terminal, it can perform uplink enhancement in the default state when the terminal is in a strong signal area, and when the terminal is in a weak signal area, it can be unfolded into a single-layer flat state, a single-layer non-flat state, a semi-surround or fully-surround terminal body state, and according to the number and orientation of the single intelligent metasurface, at least one working mode of energy sharing, mode switching and time switching is selected, and the uplink enhancement is taken into consideration while the downlink enhancement is mainly performed. In addition, for mobile terminals, since the application environment of mobile terminals changes greatly, they often switch back and forth between strong and weak signals, which is more suitable for this.

[0156] To facilitate understanding of the terminal communication method provided in the embodiment of the present application, please refer to Fig.12 and Fig.13 The embodiment shown. Fig.12 is a schematic diagram of an embodiment of the present application in which multiple single intelligent metasurfaces are used for uplink enhancement in a collapsed state. Fig.13 It is a schematic diagram of an embodiment of the present application in which multiple monomer smart metasurfaces are used for simultaneous uplink enhancement and downlink enhancement in a single-layer tiled state. Fig.12 and Fig.13 The embodiments shown are all described by taking the example that the smart metasurface accessory device includes three monomer smart metasurfaces.

[0157] Assume that the number of terminal transmitting antenna units is K, the number of base station receiving antenna array elements is M, and the number of electromagnetic units on each layer of the supersurface on the STAR-RIS in the superposition state is N.

[0158] When multiple monomer smart metasurfaces are used for uplink enhancement in the collapsed state, such as Fig.12 As shown, the base station obtains the signal transmitted by the terminal after being fully transmitted by the multi-layer superposition STAR-RIS:

[0159]

[0160] Among them, s~CN(0,1), that is, a complex Gaussian distribution with mean 0, independent real and imaginary parts and variance 1 / 2, g∈C N×M is the direct channel coefficient between the outermost layer of the STAR-RIS attachment device and the base station, g H is its transposed conjugate, k is the loss coefficient of penetrating STAR-RIS, Θ i is the transmitting phase shift matrix of any layer i∈N≡{1,2,...,I} in the multilayer, and Θ i =diag(θ i )=diag([θ i,1 ,θ i,2 ,...,θ i,N ] T ), f 1 ∈C N×K And f i ∈C N×N , are the channel coefficients from the terminal RF chain to the innermost layer of STAR-RIS, any layer after the second layer to the next layer and even the outermost layer, n is Gaussian white noise (AWGN), the terminal RF chain transmits the uplink beamforming vector w, w∈C K×1 Power Limitation (the square of the 2-norm of w).

[0161] The receiving combination vector v∈C of the M collecting antennas at the base station receiving end M×1 , so the base station uplink joint receiving signal is:

[0162]

[0163] in,

[0164] In this way, under the conditions of limiting the maximum transmission power and phase shift, the problem of maximizing the signal-noise ratio (SNR) detected by the base station is:

[0165]

[0166]

[0167] This is a non-convex problem and needs to be solved using an alternating optimization method. 1 ,...,Θ I , w are optimized alternately. Fixed STAR-RIS phase shift coefficient matrix Θ 1 ,...,Θ I and the terminal beamforming vector w, optimize the base station's receiving combination vector v, then fix v and w and optimize Θ 1 ,...,ΘI , and finally fix v and Θ 1 ,...,Θ I , optimize w.

[0168] The singular value decomposition (SVD) method is used to optimize v. For semi-positive definite matrices, the rank-1 relaxation is used to solve the maximum eigenvector to obtain the suboptimal solution when necessary.

[0169] Optimizing Θ 1 ,...,Θ I , with all θ i,n The optimal solution is the product of vectors with complementary phase angles.

[0170] To optimize w, we first normalize it and limit the normalized 2-norm to 1, and then convert it to the optimized normalized one through the maximum ratio merging ratio. To obtain the optimal solution, the solution object needs to be further converted into a non-convex second-order constrained second-order programming, and then auxiliary variables are introduced to convert it into a convex semi-positive definite matrix and rank 1 relaxation is performed when necessary to obtain a suboptimal solution.

[0171] When multiple monomer smart metasurfaces are used for simultaneous uplink enhancement and downlink enhancement in the unfolded state, such as Fig.13 As shown. Fig.13 In the figure, multiple monomer smart metasurfaces are in a single-layer flat state and all work in energy sharing mode, that is, the electromagnetic units of multiple monomer smart metasurfaces work in transmission and reflection at the same time. The vector v' of the base station downlink beamforming, v'∈C P×1 Power Limitation (the square of the 2-norm of v'), only the Line of Sight (LOS) path is considered, and the Non Line of Sight (NLOS) path is ignored. The downlink signal from the base station to the terminal includes both the cascade channel through STAR-RIS and the direct channel. Therefore, the signal obtained by the terminal can be expressed as (the downlink single-layer penetration loss k is extremely small and can be ignored):

[0172]

[0173] in, is the transposed conjugate of the channel coefficient transmitted to the terminal through STAR-RIS, is the ES mode phase shift and amplitude shift coefficient from STAR-RIS to the terminal (compared with uplink full transmission, amplitude modulation is added), d t1 is the direct channel coefficient from the base station to the terminal.

[0174] The receiving combination vector w of the terminal Q collection antennas 1 ∈C Q×1, so the terminal downlink joint receiving signal is:

[0175]

[0176] When performing downlink enhancement, the surrounding terminals also obtain signals through STAR-RIS transmission. 2 ',...,z′ j , the signal and z′ 1 The difference is that compared with STAR-RIS, it is far field and the path loss is larger. Temporarily treat it as consistent. Further, the signal to interference plus noise ratio (SINR) detected by the terminal is:

[0177]

[0178] In the above formula, the molecule Refers to the downlink signal strength received by the terminal. Refers to the downlink interference signal strength of other surrounding terminals. Refers to the downlink noise signal strength.

[0179] According to the above formula, the peripheral terminals (in w p For example, the detected signal-to-interference-to-noise ratio is:

[0180]

[0181] In this way, under the conditions of limiting the maximum transmission power and phase shift, the problem of maximizing the SINR detected by the terminal is:

[0182]

[0183]

[0184]

[0185] This is a non-convex problem and needs to be solved using an alternating optimization method. w 1 Alternating Optimization. Fixed STAR-RIS Coefficient Matrix and the base station beamforming vector v', the receiving combination vector w of the terminal is optimized 1 , then fix v′ and w 1 ,optimization Finally fixed w 1 and Optimize v'.

[0186] Optimize w 1The SVD method is used to obtain the suboptimal solution by solving the maximum eigenvector method for semi-positive definite matrices with rank-1 relaxation when necessary.

[0187] optimization Find θ n The continuous solution that satisfies the unit modulus constraint is rounded to the nearest discrete value, and then the original optimization problem is transformed into a binary variable optimization problem to obtain the global optimal solution.

[0188] To optimize v', first normalize it and limit the 2-norm after regularization to 1, and convert it to the optimized normalized one through the maximum ratio merging ratio To obtain the optimal solution, the solution object needs to be further converted into a non-convex second-order constrained second-order programming, and then auxiliary variables are introduced to convert it into a convex semi-positive definite matrix and rank 1 relaxation is performed when necessary to obtain a suboptimal solution.

[0189] For other peripheral terminals, there are two types: those transmitted by STAR-RIS and those reflected by STAR-RIS, such as Fig.13 Middle W 2 is the peripheral terminal reflected by STAR-RIS, W 3 is the peripheral terminal transmitted by STAR-RIS. It should be noted that W i ,i=1,...,J, the symbols are capitalized to distinguish the terminal from its receiving combination vector w i ,i=1,..,J; at the same time, w i The receiving combination vector of the multiple monomer smart metasurfaces in the unfolded state of the accessory device should be marked as w' from the perspective of matching other parameters. i , but because it already has the subscript i, it can be distinguished from the terminal uplink beamforming vector w in the closed state, so w is no longer used here. i Add the mark '.

[0190] The SINR detected by the terminal transmitted by STAR-RIS is:

[0191]

[0192] The SINR detected by the terminal reflected by STAR-RIS is:

[0193]

[0194] In addition, when multiple single-unit intelligent metasurfaces are deployed, the terminal also has an application state of uplink via STAR-RIS. Taking STAR-RIS transmission as an example, the SINR detected by the base station at this time is:

[0195]

[0196] in, is the receiving combination vector of the base station in response to uplink applications, is the direct channel coefficient between the outermost layer of the accessory device and the base station at this time, The ES mode phase shift and amplitude shift coefficients from the terminal to STAR-RIS at this time are: This is the channel coefficient transmitted from the terminal to the base station through STAR-RIS. is the direct channel coefficient from the terminal to the base station at this time, is the uplink beamforming vector of the terminal or other surrounding terminals; at this time, Refers to the uplink signal strength of the terminal received by the base station. Refers to the uplink interference signal strength of surrounding terminals. Indicates the uplink noise signal strength.

[0197] For the surrounding terminals, the SINR detected by the base station at this time is:

[0198]

[0199] in, Refers to the uplink signal strength of a surrounding terminal received by the base station. Refers to the uplink interference signal strength of other surrounding terminals. Indicates the uplink noise signal strength.

[0200] For multiple single-unit intelligent metasurfaces that are all configured in mode switching or time switching working mode, the above formula can be Replace with That’s it, where δ=1,i,j,l,x.

[0201] The above-mentioned non-convex optimization can be performed according to the terminal optimization method, or can be optimized by AI and / or ML methods. The purpose of the optimization is to achieve STAR-RIS beamforming with minimized transmission power while ensuring that the signal-to-interference-to-noise ratio of each terminal user meets the standard.

[0202] It should be noted that when multiple monomer smart metasurfaces switch from simultaneous uplink and downlink enhancement in the expanded state to uplink enhancement in the folded state, the specific process is similar to the above-mentioned process of switching from uplink enhancement in the folded state to simultaneous uplink and downlink enhancement in the expanded state, and will not be described in detail here.

[0203] The difference between the smart metasurface attachment device provided in the embodiment of the present application and the smart metasurface in the relay state is that when used for uplink enhancement, the terminal is very close to the smart metasurface attachment device, which is a near-field model. When the smart metasurface attachment device is used for uplink enhancement in the retracted state, due to the shielding effect of the shielding cover, the signal is not introduced with external interference. When phase shifting, amplitude modulation can be performed due to the near-field characteristics to achieve power enhancement, and even 50% can be enhanced. After the smart metasurface attachment device is unfolded, the application forms are complex and diverse. Fig.13 Only a single-layer flat state for simultaneous uplink and downlink enhancement is taken as an example for explanation, and other application forms can be deduced by analogy. At the same time, the process of the intelligent metasurface accessory device switching from the expanded state to the collapsed state can also be deduced by analogy, and will not be repeated here.

[0204] When the intelligent metasurface accessory device assists the terminal in uplink enhancement, multiple single intelligent metasurfaces all work in transmission, corresponding to the transmission function. When the intelligent metasurface accessory device assists the terminal in downlink enhancement, multiple single intelligent metasurfaces can work in transmission and reflection at the same time, corresponding to the transmission function and the reflection function. Fig.14 As shown. In addition, because the smart metasurface accessory device can appear in different orientations after unfolding, it can provide a wider range of application scenarios. For example, multiple monomer smart metasurfaces will have different orientation angles in a single-layer flat state, and can form twin smart metasurfaces, which greatly enhances the perception ability. For another example, in the case of semi-surround or fully-surround terminals, multiple monomer smart metasurfaces can provide multi-directional communication-accompanied energy transmission to the terminal and surrounding terminals, so that the smart metasurface service can be expanded in all directions, which can effectively enhance the rich path and greatly improve the application capabilities under the NLOS path.

[0205] Fig.15 It is a flowchart of a terminal communication method according to an embodiment of the present application. Fig.15 The embodiment shown can be applied to a base station. Fig.15 The terminal communication method shown includes the following steps.

[0206] S152: Receive channel status information, working status and / or configuration information of multiple single-body intelligent metasurfaces sent by the terminal.

[0207] The terminal here can be a terminal that is fixedly connected to the smart metasurface accessory device provided in an embodiment of the present application or connected in a detachable manner. When the terminal is communicating, it can determine the working status of multiple monomer smart metasurfaces in the smart metasurface according to its own communication quality parameters, and after determining the working status, further determine the configuration information of the multiple monomer smart metasurfaces. Then, the channel state information can be measured, and the channel state information, the working status of multiple monomer smart metasurfaces and / or the configuration information can be sent to the base station, at which time the base station can receive the channel state information, the working status of multiple monomer smart metasurfaces and / or the configuration information from the terminal.

[0208] The working state of the multiple monomer smart metasurfaces is a folded state or an unfolded state. When the working state is a folded state, the configuration information of the multiple monomer smart metasurfaces includes the corresponding transmission functions of the multiple monomer smart metasurfaces. When the working state is an unfolded state, the configuration information of the multiple monomer smart metasurfaces includes at least one of the working modes of the multiple monomer smart metasurfaces, the monomer smart metasurfaces corresponding to different working modes, the unfolding mode, the unfolding angle, and the coverage direction. The specific implementation method of the terminal determining the working state and configuration information of the multiple monomer smart metasurfaces can be found in Fig.11 The corresponding steps in the illustrated embodiment will not be described in detail here.

[0209] S154: Perform channel estimation and beamforming according to the channel state information, the working states and / or configuration information of the multiple monomer smart metasurfaces, and obtain configuration data of the multiple monomer smart metasurfaces.

[0210] The specific implementation of channel estimation and beamforming by the base station can be found in Figures 11 to 13 The corresponding contents in the illustrated embodiment will not be described in detail here.

[0211] S156: Send the configuration data of the multiple monomer smart metasurfaces to the terminal.

[0212] After receiving the configuration data, the terminal can configure parameters of the multiple single-body smart metasurfaces according to the configuration data. After completing the parameter configuration, the terminal can perform uplink or downlink data transmission through the multiple single-body smart metasurfaces.

[0213] According to the technical solution provided by the embodiment of the present application, a smart metasurface accessory device is fixedly connected to the terminal or connected in a detachable manner, and the accessory device includes a plurality of connected single-unit smart metasurfaces, and the plurality of single-unit smart metasurfaces have two states: folded and unfolded. In the folded state, the accessory device can be used to assist the terminal in uplink communication, and in the unfolded state, the accessory device can be used to assist the terminal and at least one of its peripheral terminals in uplink communication and / or downlink communication. Therefore, when the terminal has communication needs, the plurality of single-unit smart metasurfaces can be folded to assist the terminal in uplink enhancement, and the plurality of single-unit smart metasurfaces can be unfolded to assist the terminal and at least one of its peripheral terminals in uplink enhancement and / or downlink enhancement, thereby improving the communication environment and state of the terminal and / or peripheral terminals and meeting the communication needs of the terminal and / or peripheral terminals. In addition, since multiple single-body intelligent metasurfaces can assist the terminal in uplink communication when in a folded state, the RF chain transmission power of the terminal can be effectively reduced and the terminal power consumption can be saved. Since multiple single-body intelligent metasurfaces can assist the terminal and / or at least one of the surrounding terminals in uplink enhancement and / or downlink enhancement when in an unfolded state, the terminal's uplink and / or downlink transmission requirements for itself and the surrounding terminals can be met, thereby achieving flexible application in complex scenarios with ever-changing wireless communications.

[0214] The above describes specific embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0215] Fig.16 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. Fig.16 At the hardware level, the electronic device includes a processor, and optionally also includes an internal bus, a network interface, and a memory. The memory may include a memory, such as a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk storage. Of course, the electronic device may also include hardware required for other services.

[0216] The processor, network interface and memory can be interconnected through an internal bus, which can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.16 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0217] The memory is used to store the program. Specifically, the program may include a program code, and the program code includes a computer operation instruction. The memory may include a memory and a non-volatile memory, and provides instructions and data to the processor.

[0218] The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it, forming a terminal communication device at the logical level. The processor executes the program stored in the memory and is specifically used to perform the following operations:

[0219] Acquiring a communication quality parameter of the terminal;

[0220] According to the communication quality parameter of the terminal, the working state of the multiple single intelligent metasurfaces is determined, and the working state is the folded state or the unfolded state.

[0221] The above application Fig.16The method performed by the terminal communication device disclosed in the illustrated embodiment can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in a decoding processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0222] The electronic device may also perform Fig.11 The method is implemented by the terminal communication device. Fig.11 The functions in the illustrated embodiment will not be described in detail in the embodiments of the present application.

[0223] Of course, in addition to software implementation methods, the electronic device of the present application does not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc. That is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0224] The embodiment of the present application also provides a computer-readable storage medium, which stores one or more programs, wherein the one or more programs include instructions, which, when executed by a portable electronic device including a plurality of application programs, enable the portable electronic device to execute Fig.11 The method of the embodiment shown is specifically used to perform the following operations:

[0225] Acquiring a communication quality parameter of the terminal;

[0226] According to the communication quality parameter of the terminal, the working state of the multiple single intelligent metasurfaces is determined, and the working state is the folded state or the unfolded state.

[0227] Fig.17 This is a schematic diagram of the structure of a terminal communication device 170 according to an embodiment of the present application. Fig.17 In a software implementation, the terminal communication device 170 may include: an acquisition module 171 and a determination module 172, wherein:

[0228] An acquisition module 171 is used to acquire a communication quality parameter of the terminal;

[0229] The determination module 172 determines the working state of the multiple single intelligent metasurfaces according to the communication quality parameter of the terminal, and the working state is the folded state or the unfolded state.

[0230] Optionally, the determining module 172 determines the working states of the multiple single smart metasurfaces according to the communication quality parameter of the terminal, including:

[0231] In a case where the communication quality parameter of the terminal is greater than or equal to a preset quality parameter value, determining that the working state is the collapsed state; or,

[0232] When the communication quality parameter of the terminal is less than the preset quality parameter value, the working state is determined to be the expanded state.

[0233] Optionally, the device 170 further includes a processing module 173; wherein, when the determining module 172 determines the working states of the plurality of monomer smart metasurfaces, it further includes at least one of the following:

[0234] The processing module 173 reduces the radio frequency chain transmission power of the terminal when the working state is the folded state; maintains or increases the radio frequency chain transmission power of the terminal according to the dynamic value of the communication quality parameter of the terminal when the working state is the unfolded state;

[0235] The determination module 172 determines configuration information for the multiple monomer smart metasurfaces according to the working state, wherein, when the working state is the folded state, the configuration information includes the corresponding transmission functions of the multiple monomer smart metasurfaces, and when the working state is the unfolded state, the configuration information includes at least one of the working modes of the multiple monomer smart metasurfaces, the monomer smart metasurfaces corresponding to different working modes, the unfolding mode, the unfolding angle, and the coverage direction; when the working state is the unfolded state, if an uplink enhancement request and / or a downlink enhancement request is received, the configuration information of the multiple monomer smart metasurfaces is adjusted according to the communication quality parameters and power consumption status of the terminal, the uplink enhancement request includes an uplink enhancement request from the base station and / or the surrounding terminals, and the downlink enhancement request includes a downlink enhancement request from the base station and / or the surrounding terminals.

[0236] Optionally, the device 170 further includes a sending module 174;

[0237] The sending module 174 sends notification information to the accessory device, where the notification information includes the working status and / or configuration information of the multiple monomer smart metasurfaces, and the notification information is used by the accessory device to adjust the working status and / or configuration of the multiple monomer smart metasurfaces.

[0238] Optionally, the device 170 further includes a receiving module 175;

[0239] The sending module 174 sends the channel state information, the working state and / or the configuration information to the base station;

[0240] The receiving module 175 receives configuration data of the multiple monomer smart metasurfaces from the base station, where the configuration data is obtained by the base station after performing channel estimation and beamforming according to the channel state information, the working state and / or the configuration information;

[0241] The processing module 173 performs parameter configuration on the plurality of single intelligent metasurfaces according to the configuration data;

[0242] Wherein, when the working state is the unfolded state and the accessory device is used to assist the terminal and / or the peripheral terminals in downlink communication, the configuration data is determined according to the signal to interference and noise ratio of the signal received by the terminal; the signal to interference and noise ratio is determined according to the downlink signal, the downlink interference signal and the downlink noise signal received by the terminal, the downlink signal is determined according to the downlink communication parameters of the terminal, the downlink interference signal is determined according to the downlink communication parameters of the peripheral terminals, and the downlink noise signal is a complex Gaussian distribution;

[0243] When the working state is the unfolded state and the accessory device is used to assist the terminal and / or the peripheral terminals in uplink communication, the configuration data is determined according to a signal to interference plus noise ratio of a signal received by the base station; the signal to interference plus noise ratio is determined according to an uplink signal, an uplink interference signal and an uplink noise signal of the terminal received by the base station, the uplink signal is determined according to an uplink communication parameter of the terminal, the uplink interference signal is determined according to an uplink communication parameter of the peripheral terminals, and the uplink noise signal is a complex Gaussian distribution.

[0244] The terminal communication device 170 provided in the embodiment of the present application may also execute Fig.11 The method is implemented by the terminal communication device 170 Fig.11 The functions of the illustrated embodiment will not be described in detail in the embodiments of the present application.

[0245] The present application also provides a terminal, which can be fixedly connected to the smart metasurface accessory device provided in the present application or connected in a detachable manner. When the terminal is connected to the smart metasurface accessory device, the terminal can also communicate through the terminal communication method provided in the present application, thereby effectively improving the communication environment and state of the terminal in complex scenarios with multiple wireless communication terminals and meeting the communication needs of the terminal. For details, please refer to the above Figures 1 to 14 The illustrated embodiment will not be described in detail here. Optionally, the terminal may be a mobile terminal or a fixed terminal, and may specifically include but not limited to CPE, a vehicle-mounted terminal, a mobile phone, a tablet computer, and a smart home.

[0246] In short, the above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0247] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0248] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0249] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0250] Each embodiment in this application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

Claims

1. An intelligent metasurface accessory device, the accessory device is fixedly connected to a terminal or is detachably connected to the terminal, the accessory device comprises a plurality of monomer intelligent metasurfaces, the plurality of monomer intelligent metasurfaces are connected, wherein: The plurality of monomer smart metasurfaces include a folded state and an unfolded state; In the retracted state, the accessory device is used to assist the terminal in uplink communication; In the unfolded state, the accessory device is used to assist the terminal and at least one of the peripheral terminals of the terminal in performing uplink communication and / or downlink communication.

2. The accessory device according to claim 1, further comprising a shielding cover, the shielding cover comprising an absorbing material, the shielding cover having a support rod and a first rotating shaft, the first rotating shaft being driven by a first motor, and the first rotating shaft controlling the support rod to drive the shielding cover to open or close when rotating; in, In the retracted state, the shielding cover is in a closed state, the multiple monomer smart metasurfaces are located inside the shielding cover, and the shielding cover is used to shield external interference; In the unfolded state, the shielding cover is in an open state, and the multiple monomer smart metasurfaces extend outward from the shielding cover.

3. The accessory device according to claim 1 or 2, wherein the accessory device is connected to the terminal via a supporting platform, and the supporting platform is fixedly connected to the terminal or connected to the terminal in a detachable manner; The supporting gimbal has a second rotating shaft, which is driven by a second motor. When the second rotating shaft rotates, it drives the supporting gimbal to rotate. When the supporting gimbal rotates, it drives the multiple monomer intelligent metasurfaces to expand or collapse.

4. The accessory device according to claim 3, wherein the plurality of single intelligent metasurfaces are connected by a torsion spring hinge, and the torsion spring hinge is used to assist the supporting gimbal in unfolding or folding the plurality of single intelligent metasurfaces; in, A third motor is provided at the torsion spring hinge. In the unfolded state, the third motor is used to drive the torsion spring hinge to adjust the angle between the multiple monomer smart metasurfaces.

5. The accessory device according to claim 1, wherein the accessory device comprises a control circuit board, wherein the control circuit board is provided with at least one of a controller, a memory, a communication module, a battery, and a power management module; in, The controller is used to control the electromagnetic units of the plurality of single intelligent metasurfaces to communicate and control the power supply of the motor; The memory is used to store the control program of the controller; The communication module is used for the controller to communicate with the terminal in close proximity; The power management module is used to control the charging and discharging of the battery through the controller. The power management module is connected to the terminal, and the connection method includes electrical connection.

6. The accessory device of any one of claims 1, 2 and 4, wherein: The collapsed state is the default state of the multiple monomer smart metasurfaces; The unfolded state includes at least one unfolding mode, and the at least one unfolding mode includes at least one of single-layer tiling, single-layer non-tiling, semi-surrounding the terminal, and fully surrounding the terminal; In the case where a single intelligent metasurface corresponds to the front side of the screen of the terminal, the single intelligent metasurface is in a transparent state; The multiple monomer smart super surfaces include a retractable monomer smart super surface. In a state of semi-surrounding the terminal or in a state of fully surrounding the terminal, the retractable monomer smart super surface is used to control the multiple monomer smart super surfaces to fit with the outer surface of the terminal.

7. The accessory device according to claim 1, wherein the plurality of single intelligent metasurfaces have a transmission function and a reflection function; in, In the collapsed state, the plurality of monomeric intelligent metasurfaces correspond to a transmission function and are used to assist the terminal in uplink communication; In the unfolded state, the multiple monomeric intelligent metasurfaces have at least one working mode and are used to assist the terminal and at least one of the peripheral terminals in uplink communication and / or downlink communication, and the at least one working mode includes at least one of energy sharing, mode switching and time switching. The energy sharing represents that all electromagnetic units in the monomeric intelligent metasurface correspond to the transmission function and the reflection function at the same time, the mode switching represents that some electromagnetic units in the monomeric intelligent metasurface correspond to the transmission function and some electromagnetic units correspond to the reflection function, and the time switching represents that all electromagnetic units in the monomeric intelligent metasurface correspond to the transmission function and the reflection function in a time-sharing manner.

8. A terminal communication method, applied to the terminal, wherein the terminal is fixedly connected or detachably connected to the intelligent metasurface accessory device according to any one of claims 1 to 7, the method comprising: Acquiring a communication quality parameter of the terminal; According to the communication quality parameter of the terminal, the working state of the multiple single intelligent metasurfaces is determined, and the working state is the folded state or the unfolded state.

9. The method according to claim 8, wherein determining the working status of the plurality of single intelligent metasurfaces according to the communication quality parameters of the terminal comprises: When the communication quality parameter of the terminal is greater than or equal to a preset quality parameter value, determining that the working state is the collapsed state; or, When the communication quality parameter of the terminal is less than the preset quality parameter value, the working state is determined to be the expanded state.

10. The method according to claim 8 or 9, wherein when determining the working states of the plurality of single smart metasurfaces, the method further comprises at least one of the following: When the working state is the folded state, reducing the radio frequency chain transmission power of the terminal; When the working state is the unfolded state, maintaining or increasing the radio frequency chain transmission power of the terminal according to the dynamic value of the communication quality parameter of the terminal; According to the working state, configuration information of the plurality of monomer smart metasurfaces is determined, wherein: When the working state is the folded state, the configuration information includes the corresponding transmission functions of the multiple monomer smart metasurfaces; when the working state is the unfolded state, the configuration information includes at least one of the working modes of the multiple monomer smart metasurfaces, the monomer smart metasurfaces corresponding to different working modes, the unfolding mode, the unfolding angle, and the covering direction; When the working state is the expanded state, if an uplink enhancement request and / or a downlink enhancement request is received, the configuration information of the multiple monomer smart metasurfaces is adjusted according to the communication quality parameters and power consumption status of the terminal, and the uplink enhancement request includes an uplink enhancement request from the base station and / or the surrounding terminals, and the downlink enhancement request includes a downlink enhancement request from the base station and / or the surrounding terminals.

11. The method of claim 10, further comprising: Sending notification information to the accessory device, the notification information including the working status and / or configuration information of the multiple monomer smart metasurfaces, and the notification information is used by the accessory device to adjust the working status and / or configuration of the multiple monomer smart metasurfaces.

12. The method of claim 10, further comprising: Sending channel state information, the working state and / or the configuration information to the base station; receiving configuration data of the plurality of monomer smart metasurfaces from the base station, wherein the configuration data is obtained by the base station after performing channel estimation and beamforming according to the channel state information, the working state and / or the configuration information; Performing parameter configuration on the plurality of monomer smart metasurfaces according to the configuration data; Wherein, when the working state is the unfolded state and the accessory device is used to assist the terminal and / or the peripheral terminals in downlink communication, the configuration data is determined according to the signal to interference and noise ratio of the signal received by the terminal; the signal to interference and noise ratio is determined according to the downlink signal, the downlink interference signal and the downlink noise signal received by the terminal, the downlink signal is determined according to the downlink communication parameters of the terminal, the downlink interference signal is determined according to the downlink communication parameters of the peripheral terminals, and the downlink noise signal is a complex Gaussian distribution; When the working state is the unfolded state and the accessory device is used to assist the terminal and / or the peripheral terminals in uplink communication, the configuration data is determined according to a signal to interference plus noise ratio of a signal received by the base station; the signal to interference plus noise ratio is determined according to an uplink signal, an uplink interference signal and an uplink noise signal of the terminal received by the base station, the uplink signal is determined according to an uplink communication parameter of the terminal, the uplink interference signal is determined according to an uplink communication parameter of the peripheral terminals, and the uplink noise signal is a complex Gaussian distribution.

13. An electronic device, comprising: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 8 to 12.

14. A computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method according to any one of claims 8 to 12.

15. A terminal, wherein the terminal is fixedly connected or detachably connected to the intelligent metasurface accessory device according to any one of claims 1 to 7.

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