Method and system for improving wireless communication throughput rate within 5g defined space

Abstract

The application discloses a 5G limited space wireless communication throughput rate improving method and system.In the method, according to the 5G throughput rate formula proposed by the 3GPP protocol, the modulation mode and coding efficiency of the 5G signal are optimized, and the throughput rate of the system is significantly improved.Based on the method, a wireless communication system combining a high-gain metasurface attached to glass and a CPE is invented.The system transmits and enhances the signal transmitted by a micro base station by attaching a high-gain metasurface to the glass, and focuses the signal to a specific area in the limited space, realizes the effect of combining the transmission gain and the focusing gain, enhances the signal in the near-field limited area, and covers the whole limited space by arranging CPE relay radiation in the area, so that the interaction with the users in the space is realized.The wireless communication system is suitable for various application scenarios containing the limited space feature, and solves the problem that the users in the complex scene are difficult to realize high-throughput rate communication.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and particularly relates to a method and system for improving wireless communication throughput in a limited space of 5G. BACKGROUND

[0002] With the wide application of 5G (5th Generation Mobile Communication Technology), the demand for throughput in the field of wireless communication is rapidly growing. The main reason is that emerging applications, such as high-definition video, AR / VR (Augmented Reality / Virtual Reality) and the Internet of Things, need higher throughput and stable network support. However, the high-frequency signals used by 5G are easily attenuated by obstacles in complex scenarios (such as indoors, subways, etc.), resulting in a decrease in signal coverage and transmission efficiency, making it difficult to maintain efficient data transmission. Metasurface technology is considered as a potential communication technology that can control the amplitude and phase of signals by regulating the reflection, transmission and refraction characteristics of electromagnetic waves. In a limited space, metasurfaces can effectively enhance the transmission and focusing performance of signals, improve channel quality, and significantly improve the throughput of communication systems. In addition, the design of transparent metasurfaces based on glass is compatible with limited space environments such as indoor environments, and has significant application advantages.

[0003] The common way to enhance indoor signals in the prior art is to design a metasurface based on glass for signal amplitude or phase, which realizes the transmission gain or focusing gain of the signal accordingly. However, the metasurface designed in the above manner has limited improvement on the signal, and it is difficult to simultaneously realize the comprehensive optimization of the transmission gain and focusing gain of the signal, resulting in limitations in system communication performance. In addition, in the prior art, the calculation of user communication rate is usually based on the channel capacity provided by the Shannon formula. For example, in the invention patent CN202211692670, a wireless communication system assisted by a metasurface is disclosed, which includes a base station, an intelligent metasurface and a terminal user. The signal transmitted by the base station is adjusted by the metasurface unit after reaching the metasurface, which realizes the optimization of the SNR (Signal-to-Noise Ratio) under the base station-metasurface-multi-user link, and the channel capacity that can be reached by the multi-user is calculated by the Shannon formula, which is used to replace the communication rate that can be realized by the user. The above communication system aims to optimize the communication performance of the user in an open scene, that is, to meet the condition that the user is located in the far field region of the metasurface. However, when realizing signal coverage in a limited space such as an indoor space, the user is often in the near field radiation region of the metasurface, at this time, the phase change of the signal incident through the metasurface unit into the limited space is more affected by the distance, and then the signal enhancement in the limited space is affected. In addition, the user's reachable rate calculated is the maximum theoretical rate that the user can reach in the ideal case, and does not consider the selection of 5G signal modulation coding and other factors in the actual communication scene, so the communication rate calculated here cannot be realized in the actual scene.

[0004] The metasurface proposed in the above invention patent uses an active unit design to meet the simultaneous adjustment of the amplitude and phase of the incident signal, which requires the introduction of an additional bias circuit to provide the necessary excitation, increasing the complexity and cost of the system. At the same time, when designing for glass and other transparent media as the substrate, the active device will exacerbate the decrease in transparency, and the introduction of the excitation source may also bring additional noise and interference, affecting the quality and stability of the incident signal. SUMMARY

[0005] The purpose of the present application is to meet the needs of 5G user wireless communication throughput in a limited space. In order to achieve the above purpose, a 5G wireless communication throughput improvement method and system in a limited space are provided, which effectively improves the signal quality and coverage of the user in a limited space such as an indoor space, and enhances the wireless communication throughput of the user in the limited space.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] According to a first aspect of an embodiment of the present application, a method for improving the throughput of wireless communication in a 5G defined space is provided, according to the 3GPP (3rd Generation Partnership Project) protocol, wherein the achievable throughput of a channel is represented as:

[0008]

[0009] wherein J is the number of aggregated carriers, N is the number of resource blocks, OH is the overhead, v is the number of MIMO layers, Ts is the average duration of an OFDM symbol, f is the uplink-downlink symbol ratio, Q is the modulation order, and R is the coding efficiency, wherein the modulation order Q and the coding efficiency R are selected in association, and both are referred to as the modulation and coding scheme (MCS).

[0010] The method for improving the throughput includes that the micro base station transmits a signal, the high-gain metasurface improves the channel quality of the metasurface-to-CPE (Customer Premises Equipment) link by regulating the incident signal, and the CPE feeds back the current channel state information to the micro base station through the uplink after receiving the signal, and the micro base station optimizes the data transmission strategy according to the current channel quality to improve the achievable throughput of the system.

[0011] The optimization of the data transmission strategy depends on the dynamic adjustment of the modulation and coding scheme of the micro base station for transmitting the 5G signal, and on the basis of ensuring that the BLER (Block Error Rate) of the communication system does not exceed the minimum requirement of the system, which is 10%, the signal configuration is optimized to achieve the maximum throughput under the current channel.

[0012] In an embodiment of the present application, the specific operation steps of the method for improving the throughput applied to indoor wireless communication include:

[0013] S101: The micro base station transmits a 5G signal.

[0014] S102: The high-gain metasurface regulates the amplitude and phase of the incident signal to achieve high signal gain in the near-field finite area by taking into account the transmission gain and focusing gain.

[0015] The high-gain metasurface in step S102 comprises an array of 40×40 metasurface units. The metasurface units are designed based on Low-E (low-emissivity) glass and are suitable for the 5GN79 frequency band. Each metasurface unit consists of a metal layer and a dielectric layer. The metal layer includes a first metal layer 1, a second metal layer 2, and a third metal layer 3. The dielectric layer includes a first dielectric layer 4 and a second dielectric layer 5. The first metal layer 1, the first dielectric layer 4, the second metal layer 2, the second dielectric layer 5, and the third metal layer 3 are arranged sequentially from top to bottom.

[0016] The high-gain metasurface unit is square with a side length of 12 mm. The first metal layer 1 and the third metal layer 3 have the same shape and size. The metal layer patterns used include a square metal pattern and a rectangular metal pattern. That is, the first metal layer 1 and the third metal layer 3 of each type of metasurface unit are one of the square metal pattern and the rectangular metal pattern. The metal patterns in the first metal layer 1 and the third metal layer 3 are aligned and overlapped. The pattern of the second metal layer 2 is a rectangular metal pattern. The metal pattern layer is symmetrical about the center of the unit and is attached to the dielectric layer with a thickness of 50 micrometers. The first dielectric layer 4 and the second dielectric layer 5 have the same shape and size. The dielectric material is PMMA (Poly(methylmethacrylate)) with a thickness of 1 mm.

[0017] The high-gain metasurface unit can adjust the size of the square ring inside the zigzag metal pattern or the square ring in the kou-shaped metal pattern in the first and third metal layers to achieve amplitude and phase modulation of the incident signal.

[0018] The high-gain metasurface has a size of 480mm × 480mm and is formed by 40 × 40 high-gain metasurface units according to a predetermined amplitude and phase distribution. That is, each unit with different amplitude and phase adjustments to the incident signal corresponds to a metal pattern size, so as to achieve transmission gain and focusing gain relative to Low-E glass. The gain of the high-gain metasurface array to the incident signal can be expressed as:

[0019] Gain = G t +G f ,

[0020] Among them G t For transmission gain, G f The focus gain is achieved by using metasurfaces to enhance the SNR in a finite near-field region. Furthermore, the designed high-gain metasurface array exhibits a high transmittance of 80.4%.

[0021] S103: After the CPE receives the enhanced incident signal in the near-field limited area, the CPE radiates again to achieve signal coverage of the entire limited space, and meanwhile, the CPE feeds back channel state information to the micro base station according to the received signal quality;

[0022] The feedback process of the CPE to the incident signal in the step S103 is as follows:

[0023] After receiving the signal enhanced by the metasurface, the CPE feeds back the current channel state information to the micro base station through the uplink;

[0024] S104: The micro base station dynamically adjusts the modulation and coding scheme of the transmitted signal according to the received channel state information, so as to achieve a higher system throughput rate;

[0025] The dynamic adjustment process of the micro base station to the incident signal in the step S104 is as follows:

[0026] According to the relationship between the BLER of the communication system and the SNR (Signal to Noise Ratio) of the receiving end, the micro base station ensures that the BLER of the communication system meets the minimum requirement of not exceeding 10% to maintain normal communication, dynamically adjusts the modulation and coding scheme of the transmitted signal, selects the highest modulation and coding scheme that meets the system requirements, increases the amount of information carried by the signal, and realizes the maximum throughput rate under the current channel state;

[0027] S105: The CPE radiates the signal adjusted by the micro base station to the limited space again to achieve signal coverage of the entire space.

[0028] In an embodiment of the present application, the throughput rate improvement method is applied to the specific operation steps of high-speed rail wireless communication, which comprises the following steps:

[0029] S201: The micro base station transmits a 5G signal;

[0030] S202: The high-gain metasurface regulates the amplitude and phase of the incident signal and focuses the incident signal on the CPE on the other side; after receiving the enhanced signal, the CPE realizes signal coverage of the entire limited space; in addition, the CPE sends channel state information back to the micro base station through the uplink according to the received signal quality;

[0031] S203: The micro base station dynamically adjusts the modulation and coding scheme of the transmitted signal according to the received channel state information, so that the transmitted signal can carry more information and improve the throughput rate performance of the wireless communication system;

[0032] S204: The CPE re-radiates the adjusted signal of the micro base station to the defined space, realizes signal enhancement and coverage of the whole space, and improves the real-time throughput rate of the user in the defined space interacting with the CPE.

[0033] According to the second aspect of the embodiment of the present application, a system for improving the throughput rate of wireless communication in a 5G defined space is also provided, which comprises a micro base station, a high-gain metasurface and a CPE; the micro base station is used to send a 5G signal and dynamically adjust the modulation and coding scheme of the sent signal through the channel state information fed back by the CPE, so as to realize a higher system reachable throughput rate; the high-gain metasurface is attached to a glass and used to enhance the strength and channel quality of the wireless signal in a limited area; and the CPE is arranged in the limited area and used to realize signal coverage of the whole defined space and data interaction with a terminal user.

[0034] In an embodiment of the present application, the high-gain metasurface comprises an array of N×N metasurface units, the design of the metasurface unit is based on Low-E (low-emissivity) glass and is suitable for a 5G frequency band, each of the metasurface units is composed of a metal layer and a dielectric layer, the metal layer comprises a first metal layer, a second metal layer and a third metal layer, and the dielectric layer comprises a first dielectric layer and a second dielectric layer; the first metal layer, the first dielectric layer, the second metal layer, the second dielectric layer and the third metal layer are sequentially arranged from top to bottom.

[0035] The shape of the high-gain metasurface unit is a square, the side length of the unit is p, the shape and size of the first metal layer and the third metal layer are the same, the metal layer pattern adopted comprises a H-shaped metal pattern and a mouth-shaped metal pattern, that is, the first metal layer and the third metal layer of each type of metasurface unit are one of the H-shaped metal pattern and the mouth-shaped metal pattern, and the metal patterns in the first metal layer and the third metal layer are aligned and overlapped, the second metal layer pattern is a mouth-shaped metal pattern, the metal pattern layer is symmetrical about the center of the unit, is attached to the dielectric layer and has a thickness of 50 microns, and the shape and size of the first dielectric layer and the second dielectric layer are the same, the dielectric material is PMMA and the thickness is 1 mm.

[0036] The high-gain metasurface unit can adjust the size of the square ring in the H-shaped metal pattern or the size of the square ring in the mouth-shaped metal pattern in the first and third metal layers to realize amplitude and phase control of the incident signal.

[0037] In an embodiment of the present application, the high-gain metasurface is formed by N×N high-gain metasurface units in the expected amplitude and phase distribution, that is, each unit with different amplitude and phase adjustment for the incident signal corresponds to a metal pattern size, so as to realize the transmission gain and focusing gain relative to the Low-E glass, and the gain of the high-gain metasurface array for the incident signal can be represented as:

[0038] Gain=G t +G f ,

[0039] wherein G t is the transmission gain, G f is the focusing gain.

[0040] In an embodiment of the present application, the high-gain metasurface realizes the enhancement of the incident signal in the near-field region, meeting the requirements of signal regulation in the limited space.

[0041] In an embodiment of the present application, the high-gain metasurface is attached to the glass, has a compatible design with any existing glass surface, is suitable for the glass that has been put into application, and the system is suitable for all 5G frequency bands such as N78, N79, etc.

[0042] According to a third aspect of the embodiments of the present application, a computer readable storage medium is also provided, which stores computer executable instructions, and the executable instructions are executed by a processor to implement the method for improving the throughput rate of wireless communication in a limited space of 5G as described above.

[0043] The technical principle of the present application: the technical solution of the present application proposes a wireless communication system in a limited space, realizes the signal enhancement in the limited space by designing a high-gain metasurface applied in the near-field range, and realizes the signal coverage of the entire limited space by arranging CPE (Customer Premises Equipment) in the area. The designed high-gain metasurface can take into account the regulation of the amplitude and phase of the signal, and at the same time realizes the high-gain effect of the transmission gain and the focusing gain, which can effectively improve the throughput rate of the communication system.

[0044] Beneficial effects: the throughput rate improvement method proposed by the present application establishes the relationship between the gain of the incident signal of the metasurface and the throughput rate in the actual communication system, that is, the metasurface improves the signal strength received by the CPE and optimizes the channel quality, thereby expanding the optional modulation and coding scheme of the incident signal, and realizing the improvement of the system throughput rate. In addition, the present application also proposes a wireless communication system in a limited space, which includes a micro base station, a high-gain metasurface and a CPE. The high-gain metasurface designed based on glass can take into account the regulation of the amplitude and phase of the incident signal, and realize the high-gain effect of the comprehensive transmission gain and focusing gain. BRIEF DESCRIPTION OF DRAWINGS

[0045] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which:

[0046] Figure 1It is the model diagram of the 5G indoor limited space wireless communication system provided by the embodiment one of the present application.

[0047] Figure 2 It is the flow chart of the 5G indoor limited space wireless communication throughput rate improvement method provided by the embodiment one of the present application.

[0048] Figure 3 It is the metal layer structure of the high-gain metasurface array designed by the present application, Figure 3 a is the overall structure of the metasurface unit, Figure 3 b and Figure 3 c is the metal layer structure of the metasurface unit.

[0049] Figure 4 It is the metal layer structure of the high-gain metasurface array designed by the present application, Figure 4 a is the first and third layer metal structure of the metasurface array, Figure 4 b is the second layer metal structure of the metasurface array.

[0050] Figure 5 It is the relationship diagram between the system BLER and the SNR in the environment under the indoor communication scenario of the present application.

[0051] Figure 6 It is the performance diagram of the gain of the high-gain metasurface to the incident signal with the distance away from the vertical metasurface direction designed by the present application.

[0052] Figure 7 It is the performance diagram of the real-time throughput rate of the system and the SNR in the environment under the indoor communication scenario of the present application.

[0053] Figure 8 It is the model diagram of the 5G high-speed rail indoor wireless communication system provided by the embodiment two of the present application.

[0054] Figure 9 It is the flow chart of the 5G high-speed rail indoor wireless communication throughput rate improvement method provided by the embodiment two of the present application.

[0055] Figure 10 It is the relationship diagram between the system BLER and the SNR in the environment under the high-speed rail communication scenario of the present application.

[0056] Figure 11 It is the performance diagram of the real-time throughput rate of the system and the SNR in the environment under the high-speed rail communication scenario of the present application. DETAILED DESCRIPTION

[0057] In order to make the purpose, working principle and technical scheme of the present application clearer, the present application will be further described below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0058] It should be understood that the wireless communication system of the embodiments of the present application can be applied to various glass-containing defined space scenarios, such as: indoor space communication scenarios, subway communication scenarios, high-speed rail communication scenarios, etc.

[0059] The present application provides a 5G defined space wireless communication throughput rate improvement method, according to the 3GPP protocol, the throughput rate improvement method, the throughput rate that the channel can realize is expressed as:

[0060]

[0061] The number of selected aggregated carriers J is 1, the number of resource blocks N is 273, the overhead OH is 0.14, the number of MIMO layers v is 1, the average duration of OFDM symbols Ts is 0.035 ms, and the 5G signal with uplink symbol ratio f = 0.9 is used as the micro base station signal. The throughput rate improvement method includes that the micro base station transmits a signal, the high-gain metasurface improves the channel quality of the metasurface to CPE link by regulating the incident signal, the CPE feeds back the current channel state information to the micro base station through the uplink after receiving the signal, and the micro base station optimizes the data transmission strategy according to the current channel quality to improve the system reachable throughput rate.

[0062] The optimization of the data transmission strategy depends on the dynamic adjustment of the modulation and coding scheme of the transmitted 5G signal by the micro base station, and on the basis of ensuring that the system minimum requirement of the communication system BLER does not exceed 10%, the signal configuration is optimized to realize the maximum throughput rate under the current channel.

[0063] Embodiment one:

[0064] As shown in Figure 1 , an indoor wireless communication system used by the present application includes a micro base station, a high-gain metasurface and a CPE, there is no direct transmission link between the micro base station and the CPE, the micro base station and the CPE are located on the two sides of the high-gain metasurface, and the high-gain metasurface unit can realize the regulation of the amplitude and phase of the incident electromagnetic wave signal.

[0065] As shown in Figure 2 , the implementation steps of the present application are as follows:

[0066] S101: The micro base station transmits a 5G signal;

[0067] S102: The high-gain metasurface regulates the amplitude and phase of the incident signal to realize high signal gain considering the transmission gain and focusing gain in the near-field limited area;

[0068] Further, the high-gain metasurface in step S102 includes an array of 40x40 metasurface units, and the unit structure is as shown in Figure 3As shown in a, the design is based on Low-E glass, suitable for 5G N79 frequency band, each metasurface unit is composed of a metal layer and a dielectric layer, the metal layer includes: a first metal layer 1, a second metal layer 2 and a third metal layer 3, and the dielectric layer includes: a first dielectric layer 4 and a second dielectric layer 5; the first metal layer 1, the first dielectric layer 4, the second metal layer 2, the second dielectric layer 5 and the third metal layer 3 are sequentially arranged from top to bottom.

[0069] The shape of the high-gain metasurface unit is square, the side length is 12mm, the shape and size of the first metal layer 1 and the third metal layer 3 are the same, the metal layer pattern adopted includes Figure 3 a U-shaped metal pattern shown in b, and Figure 3 a square-shaped metal pattern shown in c, that is, the first metal layer 1 and the third metal layer 3 of each type of metasurface unit are one of the U-shaped metal pattern and the square-shaped metal pattern, and the metal patterns in the first metal layer 1 and the third metal layer 3 are aligned and overlapped, the pattern of the second metal layer 2 is Figure 3 a square-shaped metal pattern shown in c, the metal pattern layer is symmetrical about the center of the unit, attached to the dielectric layer, with a thickness of 50 microns, the shape and size of the first dielectric layer 4 and the second dielectric layer 5 are the same, the dielectric material is PMMA (polymethyl methacrylate), with a thickness of 1mm.

[0070] The high-gain metasurface unit can realize the amplitude and phase control of the incident signal by adjusting the size of the square ring in the U-shaped metal pattern in the first and third metal layers or the size of the square ring in the square-shaped metal pattern.

[0071] Based on the high-gain metasurface unit, the application designs a high-gain metasurface array, the size of the array is 480mm*480mm, which is formed by 40*40 high-gain metasurface units according to the expected amplitude and phase distribution, that is, each unit with different amplitude and phase adjustment for the incident signal corresponds to a metal pattern size, wherein Figure 4 a is the structure of the first metal layer and the third metal layer, Figure 4 b is the structure of the second metal layer. The high-gain metasurface can simultaneously realize the transmission gain and focusing gain relative to the Low-E glass, and the gain of the high-gain metasurface array to the incident signal can be expressed as:

[0072] Gain=G t +G f ,

[0073] Wherein G t is the transmission gain, and G f is the focusing gain. The gain of the metasurface to the incident signal enhances the SNR in the near-field limited area, and in addition, the designed high-gain metasurface array has a high light transmittance of 80.4%.

[0074] S103: After deploying a CPE in a limited near-field area to receive the enhanced incident signal, the signal coverage of the entire limited space is achieved by radiating again through the CPE. At the same time, the CPE feeds back the channel state information to the micro base station based on the quality of the received signal.

[0075] Furthermore, the feedback process of the CPE to the channel state in step S103 is as follows:

[0076] After receiving the enhanced signal from the metasurface, the CPE feeds back the current channel state information to the micro base station via the uplink.

[0077] S104: The micro base station dynamically adjusts the modulation and coding scheme of its transmitted signal based on the received channel state information, thereby achieving a higher system throughput.

[0078] Furthermore, the dynamic adjustment process of the micro base station to the incident signal in step S104 is as follows:

[0079] micro base station based on Figure 5 The relationship between the BLER and SNR of the communication system shown is to ensure that the communication system meets the minimum requirement that the BLER does not exceed 10% to maintain normal communication. The micro base station dynamically adjusts the modulation and coding scheme of the transmitted signal, selects the highest modulation and coding scheme that meets the system requirements, increases the amount of information carried by the signal, and achieves the maximum throughput under the current channel condition.

[0080] S105: The CPE re-radiates the adjusted signal from the micro base station back into the defined space, achieving signal coverage of the entire space;

[0081] Furthermore, high-gain metasurfaces can only enhance signals within a limited near-field region. By deploying CPEs in the signal enhancement region, signal coverage of the entire space can be achieved, thereby improving the real-time throughput of user interaction with CPEs within the limited space.

[0082] The following is a further description of this embodiment based on the simulation results:

[0083] See Figure 6 Simulations were performed on a high-gain metasurface based on Low-E glass with amplitude and phase modulation. Compared to the Low-E glass without the high-gain metasurface, the incident signal, after passing through the introduced high-gain metasurface, exhibited a signal gain of over 15 dB within a 100 mm to 150 mm vertical distance from the metasurface. Simulations were then performed on a real-world 5G communication system. Figure 7The maximum throughput achievable by a micro base station based on channel state is given when the user is in different environmental SNR conditions. When the environmental SNR is low, corresponding to the high penetration loss of 5G signals entering indoor spaces, the incident signal can only support low-order modulation and coding schemes to meet the minimum BLER requirements of the communication system, thus limiting the system's achievable throughput. The proposed method and system for improving wireless communication throughput within a confined 5G space improves the SNR in the near-field confined area by introducing a high-gain metasurface, optimizes the channel state, and expands the selectable modulation and coding schemes for the micro base station while meeting the minimum BLER requirements of the communication system, thereby effectively improving the maximum achievable throughput of the system. Figure 7 The relationship between the maximum achievable throughput of the system and the ambient SNR is given. The designed high-gain metasurface has a maximum gain of 15dB. When the initial SNR in the environment is 10dB, the system throughput is increased by 2.1 times.

[0084] Example 2:

[0085] This invention provides a method for improving wireless communication throughput within a confined 5G space. Based on the 3GPP protocol, the achievable throughput (Throughput) of the channel in this method is expressed as:

[0086]

[0087] The throughput improvement method includes a micro base station transmitting a signal, a high-gain metasurface improving the channel quality of the metasurface-to-CPE link by regulating the incident signal, and the CPE receiving the signal and feeding back the current channel status information to the micro base station through the uplink. The micro base station optimizes the data transmission strategy based on the current channel quality to improve the system's achievable throughput.

[0088] Optimizing data transmission strategies relies on the dynamic adjustment of the modulation and coding scheme of the micro base station for transmitting 5G signals. While ensuring that the minimum system requirement of BLER of the communication system does not exceed 10%, the signal configuration is optimized to achieve the maximum throughput under the current channel.

[0089] like Figure 8 As shown, another high-speed rail wireless communication system used in this invention includes a micro base station, a high-gain metasurface, and a CPE. The micro base station transmits signals through the metasurface attached to the glass to reach the CPE located on the other side. The micro base station and the CPE are located on opposite sides of the high-gain metasurface, and the high-gain metasurface unit can control the amplitude and phase of the incident electromagnetic wave signal.

[0090] like Figure 9 As shown, the implementation steps of this invention are as follows:

[0091] S201: Micro base station transmits 5G signal;

[0092] S202: The high-gain metasurface modulates the amplitude and phase of the incident signal and focuses the incident signal on the CPE on the other side; the CPE realizes signal coverage in the entire defined space after receiving the enhanced incident signal; in addition, the CPE sends channel state information back to the micro base station through the uplink according to the received signal quality;

[0093] S203: The micro base station dynamically adjusts the modulation and coding scheme of the transmitted signal according to the received channel state information, so that the transmitted signal can carry more information and improve the achievable throughput performance of the wireless communication system.

[0094] S204: The CPE re-radiates the signal adjusted by the micro base station to the defined space to realize signal coverage in the entire space and improve the real-time throughput of user interaction with the CPE in the defined space.

[0095] Compared with the indoor scene, the high-speed rail scene is a communication scene with poorer signal quality, and the SNR in the car is often lower, Figure 10 The relationship between the BLER of the communication system and the SNR of the receiving end when the SNR is low is given, at this time, the modulation and coding scheme available for the system is limited, and the achievable system throughput is low.

[0096] The 5G defined space wireless communication throughput improvement method and related system provided by the embodiment of the application comprises: a micro base station transmits a 5G signal; a high-gain metasurface modulates the amplitude and phase of the incident signal and focuses the incident signal on the CPE on the other side; the CPE realizes signal coverage in the entire defined space after receiving the enhanced signal; in addition, the CPE sends channel state information back to the micro base station through the uplink according to the received signal quality; the micro base station dynamically adjusts the modulation and coding scheme of the transmitted signal according to the received channel state information, so that the transmitted signal can carry more information and improve the achievable throughput performance of the wireless communication system. Figure 11 The maximum throughput that can be achieved by the signal based on the channel state is given when the SNR of different environments, considering a high-gain metasurface with a gain of 15dB, when the initial SNR in the environment is-6dB, the system throughput can be improved by about 10 times. Compared with the prior art, the second embodiment of the application effectively improves the 5G real-time throughput of the user in the defined space in the high-speed rail through a near-field high-gain metasurface and a CPE.

[0097] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. 5G limited space wireless communication throughput rate improvement method, characterized in that, According to the 3GPP protocol, the achievable throughput of the channel in the throughput improvement method is represented as: wherein J is the number of aggregated carriers, N is the number of resource blocks, OH is the overhead, v is the number of MIMO layers, Ts is the average duration of an OFDM symbol, f is the uplink / downlink symbol ratio, Q is the modulation order, and R is the coding efficiency, wherein the modulation order Q and the coding efficiency R are selected in association with each other, and both are referred to as a modulation and coding scheme; The throughput improvement method includes that the micro base station transmits a signal, the high-gain metasurface improves the channel quality of the metasurface to the CPE link by regulating the incident signal, the CPE feeds back the current channel state information to the micro base station through the uplink after receiving the signal, and the micro base station optimizes the data transmission strategy according to the current channel quality to improve the achievable throughput of the system; The optimization of the data transmission strategy depends on the dynamic adjustment of the modulation and coding scheme of the micro base station for transmitting the 5G signal, and on the basis of ensuring that the block error rate of the communication system does not exceed the minimum requirement of 10%, the signal configuration is optimized to achieve the maximum throughput under the current channel; The high-gain metasurface includes an array of N×N metasurface units, the design of the metasurface unit is based on Low-E glass and is suitable for the 5G frequency band, each metasurface unit is composed of a metal layer and a dielectric layer, the metal layer includes a first metal layer, a second metal layer and a third metal layer, and the dielectric layer includes a first dielectric layer and a second dielectric layer; the first metal layer, the first dielectric layer, the second metal layer, the second dielectric layer and the third metal layer are sequentially arranged from top to bottom; The shape of the metasurface unit is a square, the side length of the unit is p, the shape and size of the first metal layer and the third metal layer are the same, the metal layer pattern adopted includes a back-shaped metal pattern and a mouth-shaped metal pattern, that is, the first metal layer and the third metal layer of each type of metasurface unit are one of the back-shaped metal pattern and the mouth-shaped metal pattern, and the metal patterns in the first metal layer and the third metal layer are aligned and overlapped, the second metal layer pattern is a mouth-shaped metal pattern, the metal pattern layer is symmetric about the center of the unit, is attached to the dielectric layer, and has a thickness of 50 microns, the first dielectric layer and the second dielectric layer have the same shape and size, the dielectric material is PMMA, and the thickness is 1 mm; The metasurface unit can adjust the size of the square ring in the back-shaped metal pattern or the size of the square ring in the mouth-shaped metal pattern in the first and third metal layers to regulate the amplitude and phase of the incident signal.

2. The method of claim 1, wherein the method is a method of improving throughput rate of wireless communication in a 5G-defined space, and wherein the method further comprises: The specific operation steps of the throughput improvement method applied to indoor wireless communication include: S101: The micro base station transmits a 5G signal; S102: The high-gain metasurface regulates the amplitude and phase of the incident signal to achieve high signal gain with consideration of both transmission gain and focusing gain in a near-field limited area; The high-gain metasurface has a size of 480mm*480mm and is formed by 40*40 metasurface units according to an expected amplitude and phase distribution, that is, each unit with different amplitude and phase adjustment to incident signals corresponds to a metal pattern size, so as to realize transmission gain and focusing gain relative to Low-E glass, and the gain of the high-gain metasurface array to incident signals can be represented as: Gain = G t + G f , where G t is the transmission gain, G f is the focusing gain, the gain of the metasurface to the incident signal enhances the SNR in the near-field finite area, and in addition, the designed high-gain metasurface array has a high light transmittance of 80.4%; S103: After the CPE is arranged in the near-field limited area to receive the enhanced incident signals, the CPE radiates again to realize signal coverage of the entire limited space, and meanwhile, the CPE feeds back channel state information to the micro base station according to the received signal quality; The feedback process of the CPE to the incident signals in the step S103 is as follows: After receiving the signals enhanced by the metasurface, the CPE feeds back the current channel state information to the micro base station through an uplink; S104: The micro base station dynamically adjusts the modulation and coding scheme of the transmitted signals according to the optimized channel state, so as to realize higher system achievable throughput; The dynamic adjustment process of the micro base station to the incident signals in the step S104 is as follows: According to the relationship between the BLER of the communication system and the SNR of the receiving end, the micro base station ensures that the BLER of the communication system meets the minimum requirement of not exceeding 10% to maintain normal communication, dynamically adjusts the modulation and coding scheme of the transmitted signals, selects the highest modulation and coding scheme that meets the system requirement, increases the information amount carried by the signals, and realizes the maximum throughput under the current channel state; S105: The CPE radiates the signals adjusted by the micro base station to the limited space, to realize signal coverage of the entire space.

3. The method of claim 1, wherein the method is a method of improving the throughput rate of a wireless communication within a 5G defined space, and wherein the method further comprises: The specific operation steps of the throughput improvement method applied to high-speed rail wireless communication include: S201: The micro base station transmits 5G signals; S202: The high-gain metasurface adjusts the amplitude and phase of the incident signals and focuses the incident signals at the CPE on the other side, and the CPE realizes signal coverage of the entire limited space after receiving the enhanced signals; in addition, the CPE transmits channel state information back to the micro base station through an uplink according to the received signal quality; S203: The micro base station dynamically adjusts the modulation and coding scheme of the transmitted signals according to the received channel state information, so that the transmitted signals can carry more information and improve the achievable throughput performance of the wireless communication system; S204: The CPE radiates the signals adjusted by the micro base station to the limited space, to realize signal coverage of the entire space and improve the real-time throughput of the user and the CPE in the limited space.

4. A system for improving throughput of wireless communication in a limited space of 5G, for performing the method recited in claim 1, characterized by, The system includes a micro base station, a high-gain metasurface and a CPE; the micro base station is used to transmit 5G signals and dynamically adjust the modulation and coding scheme of the transmitted signals according to the channel state information fed back by the CPE, so as to realize higher system achievable throughput; the high-gain metasurface is attached to glass and used to enhance the strength and channel quality of wireless signals in the effective area; and the CPE is arranged in the limited space, realizes signal coverage of the entire space, and interacts with terminal users.

5. The 5G confined-in-space wireless communication throughput rate enhancement system of claim 4, wherein, The high-gain metasurface is formed by N×N metasurface units according to an expected amplitude and phase distribution, that is, each unit with different amplitude and phase adjustment for the incident signal corresponds to a metal pattern size, so as to realize transmission gain and focusing gain relative to Low-E glass, and the gain of the high-gain metasurface array for the incident signal can be represented as: Gain = G t + G f , where G t is the transmission gain, G f is the focusing gain.

6. The 5G confined-in-space wireless communication throughput rate enhancement system of claim 4, wherein, The high-gain metasurface realizes enhancement of the incident signal in a near-field region, and meets the requirement of signal regulation in a limited space.

7. The 5G confined-in-space wireless communication throughput rate enhancement system of claim 4, wherein, The high-gain metasurface is attached to glass, has a compatible design with any existing glass surface, is suitable for glass that has been put into application, and the system is suitable for all 5G frequency bands of N78.

8. A computer-readable storage medium having stored thereon computer- executable instructions, wherein, The executable instructions are executed by the processor to implement the method for improving the wireless communication throughput rate in a 5G limited space according to any one of claims 1 to 3.

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