Method and system for wireless sensing assisted high-frequency communication

Abstract

The embodiment of the invention provides a wireless sensing assisted high-frequency communication method and system, and belongs to the technical field of high-frequency communication. The method comprises the following steps of: performing wireless sensing by utilizing a cell-level signal to obtain communication user distribution information and channel information; obtaining communication user grouping information according to the communication user distribution information and the channel information; and completing wireless sensing assisted high-frequency communication according to the communication user grouping information. According to the invention, the efficiency of airspace resources and spectrum resources can be improved.

Description

Technical Field

[0001] The present application relates to the field of high-frequency communication technology, and in particular to a method and system for wireless sensing-assisted high-frequency communication. Background Art

[0002] With the emergence of new applications such as extended reality, holography and digital twins, the demand for wireless communication speed and latency is getting higher and higher, and wireless access points are becoming increasingly dense. At the same time, with the development of mobile communication systems, the spectrum used is getting higher and higher, such as millimeter waves and terahertz, and the antennas of wireless access points are also becoming increasingly dense.

[0003] The densification and high frequency of wireless networks have led to a more dynamic channel environment for communication users, which has resulted in a decrease in wireless signal transmission performance and wireless network capacity. In existing technologies, the performance guarantee and improvement of high-frequency communication systems can be achieved through beam tracking and alignment, but the signaling overhead and power consumption are large; it can also be achieved through user mobility prediction, but it requires more computing resources.

[0004] The main disadvantages of wireless communication include the dynamic nature of the channel environment, which leads to a decrease in signal transmission performance and network capacity, high signaling overhead and power consumption of high-frequency communication, and the limited number of RF links that limit spatial coverage. In addition, as the network becomes denser, interference problems become more serious, affecting user experience and the overall performance of the system. Summary of the invention

[0005] The main purpose of the embodiments of the present application is to provide a method and system for wireless sensing-assisted high-frequency communication.

[0006] The technical solution adopted by the present invention is:

[0007] On the one hand, an embodiment of the present invention provides a method for wireless sensing assisted high frequency communication, the method comprising the following steps:

[0008] Use cell-level signals for wireless sensing to obtain communication user distribution information and channel information;

[0009] Obtaining communication user grouping information according to the communication user distribution information and the channel information;

[0010] Wireless sensing assisted high frequency communication is completed according to the communication user grouping information.

[0011] Furthermore, the wireless sensing using the cell-level signal to obtain the communication user distribution information and channel information includes the following steps:

[0012] Set beamforming data;

[0013] Setting a cell-level signal according to the beamforming data;

[0014] Using the cell-level signal to perform wireless sensing to obtain an echo signal;

[0015] Communication user distribution information and channel information are obtained according to the echo signal.

[0016] Furthermore, the formula used in setting the beamforming data includes:

[0017]

[0018] stγ≥γ min

[0019]

[0020] Among them, θ is the preset starting direction;

[0021] Assume the scanning interval is Δθ, and the next scanning direction is θ=θ+Δθ;

[0022] CRLB is the Cramer-Rao bound;

[0023] γ represents the received signal-to-noise ratio of the communication user;

[0024] γ min The signal-to-noise ratio threshold for receiving cell-level information of a communication user;

[0025] P T is the transmission power of the base station;

[0026] w is the beamforming vector of the base station;

[0027] The receiving signal-to-noise ratio of the communication user and the transmitting power of the base station are used as beamforming data.

[0028] Further, obtaining communication user grouping information according to the communication user distribution information and the channel information comprises the following steps:

[0029] Setting condition information; the condition information includes azimuth range condition information, channel difference condition information, and channel correlation condition information;

[0030] According to the condition information, the communication user distribution information and the channel information, beam-level user grouping judgment information is obtained; the beam-level user grouping judgment information includes user azimuth range judgment information, user channel difference judgment information, and user channel correlation judgment information;

[0031] According to the beam-level user grouping judgment information, if the communication user is not within a preset azimuth range, adding the communication user to a precoding group;

[0032] According to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range and satisfies a channel difference condition, adding the communication user to a frequency reuse group;

[0033] According to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range, does not meet a channel difference condition, and meets a channel correlation condition, then adding the communication user to the precoding group;

[0034] According to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range and does not meet a channel difference condition and a channel correlation condition, then the communication user is added to a non-frequency reuse group;

[0035] Communication user grouping information is obtained according to the precoding group, the frequency reuse group and the non-frequency reuse group.

[0036] Further, according to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range and satisfies a channel difference condition, the communication user is added to a frequency reuse group, and the formula used includes:

[0037]

[0038] Among them, Φ noma,j is the frequency multiplexing group data;

[0039] h is the first communication user;

[0040] u is the second communication user;

[0041] h j is the channel gain between the first communication user and the base station;

[0042] h u is the channel gain between the second communication user and the base station;

[0043] is the noise power of the first communication user;

[0044] is the noise power of the second communication user;

[0045] θ j is the azimuth between the first communication user and the base station;

[0046] θ u is the azimuth between the second communication user and the base station;

[0047] Q thr is the channel difference threshold;

[0048] θthr is the orientation threshold;

[0049] Ω is the set of communicating users.

[0050] Further, obtaining communication user grouping information according to the communication user distribution information and the channel information comprises the following steps:

[0051] Setting orthogonal multiple access condition information;

[0052] Setting non-orthogonal multiple access condition information;

[0053] According to the orthogonal multiple access condition information, the non-orthogonal multiple access condition information, the communication user distribution information and the channel information, user grouping judgment information based on the channel information is obtained; the user grouping judgment information based on the channel information includes user orthogonal multiple access condition judgment information and user non-orthogonal multiple access condition judgment information;

[0054] According to the user grouping judgment information based on the channel information, if the communication user meets the orthogonal multiple access condition, adding the communication user to the non-frequency reuse group;

[0055] According to the user grouping judgment information based on the channel information, if the communication user does not meet the orthogonal multiple access condition and does not meet the non-orthogonal multiple access condition, adding the communication user to the precoding group;

[0056] According to the user grouping judgment information based on the channel information, if the communication user does not meet the orthogonal multiple access condition but meets the non-orthogonal multiple access condition, adding the communication user to the frequency reuse group;

[0057] Communication user grouping information is obtained according to the non-frequency reuse group, the precoding group and the frequency reuse group.

[0058] Furthermore, the formula used for setting the orthogonal multiple access condition information includes:

[0059] Φ OMA,j = {u; r j,u >r thr,PRC ,CQ j,u <CQ thr,PRC ,u,j∈Ω}

[0060]

[0061] l is the base station antenna;

[0062] n is the wireless signal transmission attenuation coefficient;

[0063] h j,lis the channel gain from the first communication user to the base station antenna;

[0064] h u,l is the channel gain from the second communication user to the base station antenna;

[0065] r j,u is a channel correlation coefficient between the first communication user and the second communication user;

[0066] CQ j,u is a channel quality ratio coefficient between the first communication user and the second communication user;

[0067] r thr,PRC is the channel correlation coefficient threshold of the frequency reuse group;

[0068] CQ thr,PRC is the precoding group channel quality ratio coefficient threshold;

[0069] Φ OMA,j It is the orthogonal multiple access condition information.

[0070] Furthermore, the wireless sensing-assisted high-frequency communication is completed according to the communication user grouping information, including the following steps:

[0071] According to the communication user grouping information, a precoding group, a non-frequency reuse group, and a frequency reuse group are obtained;

[0072] For the precoding group, using precoding to send signals on the same time-frequency resource;

[0073] For the non-frequency multiplexing group, superposition coding is used to send signals on the same resource;

[0074] For the frequency reuse group, different user data are sent in different time-frequency resources.

[0075] Furthermore, the method for wireless sensing assisted high frequency communication also includes:

[0076] The base station obtains the communication user distribution information and the channel information through wireless sensing;

[0077] The communication user distribution information includes the relative position of the communication user and the base station, and the relative distance between the communication user and the base station;

[0078] The base station determines the communication user grouping information and the communication mode according to the communication user distribution information and the channel information;

[0079] The base station notifies the corresponding terminal of communication scheduling information by responding to the scheduling request message of the terminal; the communication scheduling information includes the communication mode and communication resources;

[0080] The communication mode includes a precoding mode, a frequency reuse mode and a non-frequency reuse mode; the frequency reuse mode includes non-orthogonal multiple access, and the non-frequency reuse mode includes orthogonal multiple access; the communication resources include time-frequency resources;

[0081] The base station processes the user data based on the communication mode and transmits the processed data in the corresponding beam;

[0082] The terminal processes the received data based on the communication mode;

[0083] The communication mode is originally preset as a direct processing mode. If the communication mode is the precoding mode, data is processed based on a precoding matrix; if the communication mode is the superposition coding mode, data is processed based on serial interference elimination.

[0084] On the other hand, an embodiment of the present invention further provides a system for wireless sensing-assisted high-frequency communication, the system comprising:

[0085] The first module is used to use cell-level signals for wireless sensing to obtain communication user distribution information and channel information;

[0086] A second module is used to obtain communication user grouping information according to the communication user distribution information and the channel information;

[0087] The third module is used to complete wireless sensing assisted high frequency communication according to the communication user group information;

[0088] The wireless sensing submodule is used to obtain user channel status information and user distribution, and provide input for the user grouping submodule;

[0089] A user grouping submodule is used to perform user grouping and divide users into a precoding group, a non-frequency reuse group and a frequency reuse group;

[0090] The communication mode selection submodule is used to select a communication mode according to user group information.

[0091] The embodiments of the present application include at least the following beneficial effects: The present application provides a method and system for wireless sensing-assisted high-frequency communication. The present invention uses cell-level signals for wireless sensing to obtain communication user distribution information and channel information; obtains communication user grouping information based on the communication user distribution information and the channel information; and completes wireless sensing-assisted high-frequency communication based on the communication user grouping information. The present invention can improve the efficiency of airspace resources and spectrum resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] Figure 1 is a flow chart of a method for wireless sensing assisted high frequency communication provided by an embodiment of the present invention;

[0093] Figure 2 is an architecture diagram of wireless sensing assisted high frequency communication provided by an embodiment of the present invention;

[0094] Figure 3 is a schematic diagram of a method for wireless sensing-assisted high-frequency communication provided by an embodiment of the present invention;

[0095] Figure 4 is a schematic diagram of a beam-level user grouping method provided by an embodiment of the present invention;

[0096] Figure 5 is a schematic diagram of an azimuth-based grouping method provided by an embodiment of the present invention;

[0097] Figure 6 is a schematic diagram of a method for grouping users based on channel information provided by an embodiment of the present invention;

[0098] Figure 7 is a schematic diagram of a method for sending data to a communication user group provided by an embodiment of the present invention;

[0099] Figure 8 It is a schematic diagram of a signaling process of wireless sensing assisted high frequency communication provided by an embodiment of the present invention;

[0100] Fig. 9 It is a schematic diagram of a device for wireless sensing assisted high frequency communication provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0101] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0102] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0103] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0104] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0105] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0106] On the one hand, an embodiment of the present invention provides a method for wireless sensing assisted high frequency communication, referring to Figure 1 , the method comprises the following steps:

[0107] S100, using cell-level signals to perform wireless sensing to obtain communication user distribution information and channel information;

[0108] S200, obtaining communication user grouping information according to communication user distribution information and channel information;

[0109] S300: Complete wireless sensing-assisted high-frequency communication according to communication user group information.

[0110] The embodiment of the present invention discloses that step S100 uses cell-level signals to perform wireless sensing to obtain communication user distribution information and channel information, including the following steps:

[0111] S110, setting beamforming data;

[0112] S120, setting a cell-level signal according to the beamforming data;

[0113] S130, performing wireless sensing using a cell-level signal to obtain an echo signal;

[0114] S140. Obtain communication user distribution information and channel information according to the echo signal.

[0115] The embodiment of the present invention discloses step S110 of setting beamforming data, and the formula used includes:

[0116]

[0117] stγ≥γ min

[0118]

[0119] Among them, θ is the preset starting direction;

[0120] Assume the scanning interval is Δθ, and the next scanning direction is θ=θ+Δθ;

[0121] CRLB is the Cramer-Rao bound;

[0122] γ represents the received signal-to-noise ratio of the communication user;

[0123] γ min The signal-to-noise ratio threshold for receiving cell-level information of a communication user;

[0124] P T is the transmission power of the base station;

[0125] w is the beamforming vector of the base station;

[0126] The receiving signal-to-noise ratio of the communication user and the transmitting power of the base station are used as beamforming data.

[0127] The embodiment of the present invention discloses that step S200 obtains communication user grouping information according to communication user distribution information and channel information, including the following steps:

[0128] S210, setting condition information; the condition information includes azimuth range condition information, channel difference condition information, and channel correlation condition information;

[0129] S220, obtaining beam-level user grouping judgment information according to the condition information, communication user distribution information and channel information; the beam-level user grouping judgment information includes user azimuth range judgment information, user channel difference judgment information, and user channel correlation judgment information;

[0130] S230, according to the beam-level user grouping judgment information, if the communication user is not within the preset azimuth range, adding the communication user to the precoding group;

[0131] S240, according to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range and satisfies a channel difference condition, then the communication user is added to a frequency reuse group;

[0132] S250, according to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range, does not meet the channel difference condition, and meets the channel correlation condition, then the communication user is added to the precoding group;

[0133] S260, according to the beam-level user grouping judgment information, if the communication user is within the preset azimuth range, does not meet the channel difference condition, and does not meet the channel correlation condition, then the communication user is added to the non-frequency reuse group;

[0134] S270. Obtain communication user grouping information according to the precoding group, the frequency reuse group, and the non-frequency reuse group.

[0135] The embodiment of the present invention discloses that step S240 determines the user grouping information at the beam level, and if the communication user is within a preset azimuth range and satisfies the channel difference condition, the communication user is added to the frequency reuse group, and the formula used includes:

[0136]

[0137] Among them, Φ noma,j is the frequency multiplexing group data;

[0138] h is the first communication user;

[0139] u is the second communication user;

[0140] h j is the channel gain between the first communication user and the base station;

[0141] h u is the channel gain between the second communication user and the base station;

[0142] is the noise power of the first communication user;

[0143] is the noise power of the second communication user;

[0144] θ j is the azimuth between the first communication user and the base station;

[0145] θ u is the azimuth between the second communication user and the base station;

[0146] Q thr is the channel difference threshold;

[0147] θ thr is the orientation threshold;

[0148] Ω is the set of communicating users.

[0149] The embodiment of the present invention discloses that step S200 obtains communication user grouping information according to communication user distribution information and channel information, including the following steps:

[0150] S280, setting orthogonal multiple access condition information;

[0151] S290, setting non-orthogonal multiple access condition information;

[0152] S2A0, according to the orthogonal multiple access condition information, the non-orthogonal multiple access condition information, the communication user distribution information and the channel information, obtaining the user grouping judgment information based on the channel information; the user grouping judgment information based on the channel information includes the user orthogonal multiple access condition judgment information and the user non-orthogonal multiple access condition judgment information;

[0153] S2B0, according to the user grouping judgment information based on the channel information, if the communication user meets the orthogonal multiple access condition, the communication user is added to the non-frequency reuse group;

[0154] S2C0, according to the user grouping judgment information based on the channel information, if the communication user does not meet the orthogonal multiple access condition and does not meet the non-orthogonal multiple access condition, then the communication user is added to the precoding group;

[0155] S2D0, according to the user grouping judgment information based on the channel information, if the communication user does not meet the orthogonal multiple access condition but meets the non-orthogonal multiple access condition, the communication user is added to the frequency reuse group;

[0156] S2E0. Obtain communication user grouping information according to the non-frequency reuse group, the precoding group and the frequency reuse group.

[0157] The embodiment of the present invention discloses that step S280 sets orthogonal multiple access condition information, and the formula used includes:

[0158] Φ OMA,j = {u; r j,u >r thr,PRC ,CQ j,u <CQ thr,PRC ,u,j∈Ω}

[0159]

[0160] l is the base station antenna;

[0161] n is the wireless signal transmission attenuation coefficient;

[0162] h j,l is the channel gain from the first communication user to the base station antenna;

[0163] h u,l is the channel gain from the second communication user to the base station antenna;

[0164] r j,u is a channel correlation coefficient between the first communication user and the second communication user;

[0165] CQ j,u is a channel quality ratio coefficient of the first communication user and the second communication user;

[0166] rthr,PRC is the channel correlation coefficient threshold of the frequency reuse group;

[0167] CQ thr,PRC is the channel quality ratio coefficient threshold of the precoding group;

[0168] Φ OMA,j It is the orthogonal multiple access condition information.

[0169] The embodiment of the present invention discloses that step S300 completes wireless sensing-assisted high-frequency communication according to communication user group information, including the following steps:

[0170] S310, obtaining a precoding group, a non-frequency reuse group, and a frequency reuse group according to communication user grouping information;

[0171] S320, for the precoding group, using precoding to send signals in the same time-frequency resource;

[0172] S330, for a non-frequency reuse group, using superposition coding to send signals on the same resource;

[0173] S340: For a frequency reuse group, different user data sends signals in different time-frequency resources.

[0174] The method for wireless sensing-assisted high-frequency communication disclosed in an embodiment of the present invention further includes:

[0175] S400, the base station obtains the communication user distribution information and the channel information through wireless sensing;

[0176] The communication user distribution information includes the relative position of the communication user and the base station, and the relative distance between the communication user and the base station;

[0177] S500, the base station determines the communication user grouping information and the communication mode according to the communication user distribution information and the channel information;

[0178] S600, the base station notifies the corresponding terminal of communication scheduling information by responding to the scheduling request message of the terminal; the communication scheduling information includes the communication mode and communication resources;

[0179] The communication mode includes a precoding mode, a frequency reuse mode and a non-frequency reuse mode; the frequency reuse mode includes non-orthogonal multiple access, and the non-frequency reuse mode includes orthogonal multiple access; the communication resources include time-frequency resources;

[0180] S700. The base station processes user data based on the communication mode and sends the processed data in a corresponding beam.

[0181] S800, the terminal processes the received data based on the communication mode;

[0182] The communication mode is originally preset as a direct processing mode. If the communication mode is the precoding mode, data is processed based on a precoding matrix; if the communication mode is the superposition coding mode, data is processed based on serial interference elimination.

[0183] As an optional implementation, the wireless sensing assisted high-frequency communication method of the present invention first obtains the distribution and channel information of the communication users, including the relative position and distance between the users and the base station, through the base station using wireless sensing technology. Then, the base station analyzes this information, determines the communication user group and its corresponding communication mode, and sends a notification containing the communication mode and time-frequency resources to each terminal by responding to the scheduling request message of the terminal. The communication mode is divided into a precoding mode, a frequency reuse mode (such as non-orthogonal multiple access NOMA) and a non-frequency reuse mode (such as orthogonal multiple access OMA). After determining the communication mode, the base station processes the data of the user group and sends it through the corresponding beam. The terminal adopts the direct processing mode by default according to the received data; if it is a precoding mode, the precoding matrix is ​​applied for data processing; and in the superposition coding mode, the data is processed by serial interference elimination technology to ensure efficient and reliable communication.

[0184] On the other hand, an embodiment of the present invention further provides a system for wireless sensing-assisted high-frequency communication, the system comprising:

[0185] The first module is used to use cell-level signals for wireless sensing to obtain communication user distribution information and channel information;

[0186] The second module is used to obtain communication user grouping information according to communication user distribution information and channel information;

[0187] The third module is used to complete wireless sensing assisted high frequency communication according to the communication user group information;

[0188] The wireless sensing submodule is used to obtain user channel status information and user distribution, and provide input for the user grouping submodule;

[0189] A user grouping submodule is used to perform user grouping and divide users into a precoding group, a non-frequency reuse group and a frequency reuse group;

[0190] The communication mode selection submodule is used to select a communication mode according to user group information.

[0191] A method for wireless sensing-assisted high-frequency communication proposed in an embodiment of the present invention first obtains the distribution of communication users through wireless sensing, and adaptively determines beam-level communication users and their communication modes according to the distribution of communication users and channel conditions, thereby improving the efficiency of spatial domain resources and frequency domain resources and the capacity of the system.

[0192] To solve the airspace resource efficiency problem of high-frequency communication systems, refer to Figure 2 In each time slot, the wireless base station needs to serve multiple communication users. The distribution of communication users is obtained through wireless sensing, and the communication users are grouped based on the distribution of communication users and the channel environment. Different groups use corresponding communication modes to achieve efficient use of airspace resources and spectrum resources of the high-frequency communication system and improve system capacity.

[0193] The base station uses different data processing methods for the data of communication users in different user groups, and controls the beamforming of the antenna array to generate beams to send the user group data. The communication users perform corresponding reception processing according to the data processing methods.

[0194] The wireless sensing assisted high frequency communication method of the embodiment of the present invention is as follows Figure 3 .

[0195] The execution steps of the embodiment of the present invention include:

[0196] Step 1: Determine the communication user distribution and channel information

[0197] 1) The base station uses beam scanning to send cell-level information using an integrated waveform to sense communication users within the cell.

[0198] The base station scans the entire coverage area in a time-sharing manner according to the preset starting direction θ. If the scanning interval is Δθ, the next scanning direction is θ=θ+Δθ. The base station generates beamforming and transmits cell-level information with the goal of minimizing the angle estimation error, i.e., the Cramer-Rao Lower Bound (CRLB) of the angle. The scanning beamforming is determined by the following formula:

[0199]

[0200] stγ≥γ min

[0201]

[0202] γ represents the received signal-to-noise ratio of the communication user, γ min is the signal-to-noise ratio threshold for receiving cell-level information of the communication user. T is the transmit power of the base station, and w is the beamforming vector of the base station.

[0203] The above optimization problem can be relaxed into a semi-definite programming (SDP) problem by using the semidefinite relaxation algorithm (Semidefinite Relaxation, SDR), and then directly solved using the convex optimization CVX toolbox.

[0204] The cell-level information includes cell-level control information, such as synchronization, paging, system information, etc. The base station may use a communication-sensing integrated waveform such as Affine Frequency Division Multiplexing (AFDM) to transmit the cell-level information.

[0205] 2) The base station can also sense the communication users in the cell based on the regular or irregular uplink signaling signals sent by the communication users.

[0206] The uplink signaling signal includes a sounding reference signal (SRS), a location update, a measurement report, and the like.

[0207] 3) The base station estimates the relative position and distance between the communication user and the base station based on the echo or uplink signal of the integrated waveform

[0208] The base station uses traditional algorithms such as the Multiple Signal Classification (MUSIC) algorithm to obtain the relative position and relative distance (θ) between the perceived target and the communication user and the base station. j ,d j Based on pilot signals, such as the channel state information reference signal (CSI-RS), the sounding reference signal (SRS), the phase tracking reference signal (PTRS), etc., the channel information of the communication user can be obtained. j .

[0209] Step 2: Group the scheduled communication users

[0210] The scheduled communication users are determined as beam-level users. First, the scheduled communication users are grouped based on their distribution. The grouping method is as follows: Figure 4 shown.

[0211] When the scheduled communication user j and the communication user u meet the channel difference condition, user j and user u join the frequency reuse group.

[0212]

[0213] h j and h u are the channel gains between communication user j and communication user u and the base station respectively, and is the noise power of communication user j and communication user u. j and θ u are the azimuths between communication user j and communication user u and the base station, Q thr is the preset channel difference threshold, θthr is the preset position threshold. Ω is the set of scheduled communication users.

[0214] In order to reduce signaling overhead, the relative distance can also be used to determine the frequency reuse group, as shown in the following formula:

[0215]

[0216] d j and d u are the distances between communication user j and communication user u and the base station respectively, and n is the wireless signal transmission attenuation coefficient.

[0217] when When , a precoding group is determined for the scheduled communication user j. For the scheduled communication user j, when the channel correlation condition is satisfied between the scheduled communication user j and the scheduled communication user u within a certain azimuth range, the user j and the user u are added to the precoding group.

[0218]

[0219] r j,u is the channel correlation coefficient between communication user j and communication user u, r thr is the preset channel correlation coefficient threshold. w is the preset beam width.

[0220]

[0221] h j,l and h u,l denote the channel gains from user j and user u to base station antenna l, respectively. and They represent the average channel gains from user j and user u to the base station respectively.

[0222] The channel correlation coefficient is determined by spatial parameters such as antenna spacing, departure angle and angular spread of the transmitted signal, arrival angle and angular spread of the received signal, and angular power spectrum. Among them, the departure angle and angular spread of the transmitted signal, and the arrival angle and angular spread of the received signal depend on the distribution of communication users. Therefore, the azimuth angle between communication users can be used to determine the precoding group.

[0223] like Figure 5 As shown, communication users within a certain azimuth range of communication user j form a precoding group:

[0224]

[0225] There are usually a large number of local scatterers around the communication users, which will lead to a very wide angle spread. In addition, the angle difference between the communication users makes the channels between the communication users uncorrelated, ensuring the performance of precoding.

[0226] when When , a non-frequency reuse group is determined for the scheduled communication user j. When the communication user j and the communication user u do not meet the channel difference condition and the channel related condition, the user j and the user u are added to the non-frequency reuse group.

[0227]

[0228] Another grouping method based on user channel information is Figure 6 shown.

[0229] First, establish a channel information parameter set (r j,u ,CQ j,u ,CS j,u ) of the critical parameter set (r, CQ, CS). j,u is the channel correlation coefficient between communication user j and communication user u.

[0230]

[0231] h j,l and h u,l They represent the channel gains from user j and user u to base station antenna l respectively.

[0232] CQ j,u is the channel quality ratio coefficient between communication user j and communication user u.

[0233]

[0234] CS j,u is the channel quality coefficient of communication user j and communication user u.

[0235]

[0236] It can be determined that the communication performance of packet communication using the frequency reused NOMA method and the precoded PRC method is related to the channel information of each user. Therefore, there is a user channel information parameter set (r j,u ,CQ j,u ,CS j,u ), so that the communication performance of the user group using the above two coding methods is equal or similar, that is, the critical condition. According to the user channel information parameter set that the base station has historically collected, the user channel information that meets the above critical condition is recorded as the critical parameter set (r, CQ, CS).

[0237] Secondly, the coefficients of the grouping condition are determined based on the critical parameter set. The critical parameter set (r, CQ, CS) is fitted with a three-dimensional plane to obtain the key area, which is recorded as ra+CQb-CS+c=0, and a>0. The obtained a, b and c are used as the preset grouping condition coefficients based on user channel information. For deployed base stations, the values ​​of this set of coefficients are fixed.

[0238] Finally, users are divided based on the user grouping condition coefficient. When the user channel correlation is large and the user channel quality ratio is small, the communication performance using NOMA and PRC coding methods is poor. Therefore, when the channel information of the scheduled communication user j and the communication user u meets the OMA condition,

[0239] Φ OMA,j = {u; r j,u >r tht,PRC ,CQ j,u <CQ thr,PRC ,u,j∈Ω}

[0240] User j and user u join the non-frequency reuse group. thr,PGC is the preset frequency reuse group channel correlation coefficient threshold, CQ thr,PRC It is the preset precoding group channel quality ratio coefficient threshold.

[0241] when When , if the channel information of scheduled communication user j and communication user u meets the NOMA condition,

[0242] Φ NOMA,j = {u; r j,u a+CQ j,u b-CS j,u +c≥0,u,j∈Ω}

[0243] Then user u joins the frequency reuse group.

[0244] when When , communication user j and communication user u meet the PRC condition,

[0245] Φ PRC,j = {u; r j,u a+CQ j,u b-CS j,u +c<0,u,j∈Ω}

[0246] User u joins the precoding group.

[0247] In high-frequency communications, it is often required that there is a main path for direct propagation; at this time, the distribution information of each user and the channel information satisfy the following approximate proportional relationship.

[0248] cos(θ j -θu )∝r j,u

[0249]

[0250] This shows that the two methods based on user distribution information and channel information are interrelated and similar.

[0251] Step 3: Determine the data transmission method for the communication user group and send it

[0252] The base station groups each communication user into Φ j , generating a beam θ j Cover. Figure 7 As shown, the base station has prc,j The user data is precoded (beamforming in the digital domain) and sent in the beam using the same time-frequency resources, and the user is notified of the communication mode.

[0253] The base station has a frequency reuse group Φ noma,j The base station performs superposition coding on the user data and sends it in the beam using the same time-frequency resources, and notifies the user of the communication mode. u The allocated power is C u , the superposition signal sent is:

[0254]

[0255] The base station is responsible for the non-frequency reuse group user Φ oma,j The data is sent directly in the beam using orthogonal time-frequency resources without any preprocessing.

[0256] The base station has a precoding group Φ prc,j The base station sends the data vector D to each user u in the precoding group. u All pass through a precoding matrix V including digital precoding and analog precoding u , the base station's transmission signal is:

[0257]

[0258] The signaling process of the wireless sensing assisted high frequency communication method of the present invention is as follows: Figure 8 shown.

[0259] 1) The base station obtains the distribution and channel information of communication users through wireless sensing

[0260] The distribution of communication users includes the relative positions and relative distances between the communication users and the base station.

[0261] 2) The base station determines the communication user group and its communication mode according to the communication user distribution, and notifies the corresponding terminal

[0262] The base station can notify the corresponding terminal by responding to the terminal's scheduling request message, which carries the communication mode and communication resources. The communication mode includes precoding mode, frequency reuse mode and non-frequency reuse mode; the frequency reuse mode includes non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA), the non-frequency reuse mode includes orthogonal multiple access (Orthogonal Multiple Access, OMA), and the communication resources include time-frequency resources.

[0263] 3) The base station processes the user group data based on the communication mode and sends it in the corresponding beam

[0264] 4) The terminal processes the received data based on the communication mode

[0265] The default is direct processing mode. If it is precoding mode, the data is processed based on the precoding matrix, otherwise if it is superposition coding mode, the data is processed based on serial interference cancellation.

[0266] The embodiment of the present invention is based on wireless perception. One beam serves one user group. Different user groups adopt different communication modes, which improves the efficiency of airspace resources and spectrum resources. Multiple beams serve multiple user groups at the same time, further improving the utilization rate of airspace resources.

[0267] As an optional implementation, refer to Fig. 9 , the wireless sensing assisted high frequency communication device of the embodiment of the present invention includes:

[0268] The wireless sensing submodule is used to obtain user channel status information and user distribution, and provide input for the user grouping submodule.

[0269] The user grouping submodule performs user grouping based on user distribution or channel state information, and divides users into precoding groups, non-frequency reuse groups, and frequency reuse groups.

[0270] Communication mode selection submodule: select digital precoding mode for data processing, allocate the same time-frequency resources, and generate corresponding beamforming for users in the precoding group; select non-orthogonal multiple access mode such as superposition coding for data processing, allocate the same time-frequency resources, and generate corresponding beamforming for users in the frequency reuse group, and allocate different time-frequency resources for users in the non-frequency reuse group and generate corresponding beamforming.

[0271] On the other hand, an embodiment of the present invention also provides a device for wireless sensing assisted high-frequency communication, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for wireless sensing assisted high-frequency communication as described above is implemented.

[0272] The wireless sensing assisted high frequency communication device of the embodiment of the present invention includes a memory and a processor.

[0273] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0274] The memory may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage. Among them, ROM can store static data or instructions required by the processor or other modules of the computer. The permanent storage device may be a readable and writable storage device. The permanent storage device may be a non-volatile storage device that does not lose the stored instructions and data even after the computer is powered off. In some embodiments, the permanent storage device uses a large-capacity storage device (such as a magnetic or optical disk, flash memory) as a permanent storage device. In some other embodiments, the permanent storage device may be a removable storage device (such as a floppy disk, optical drive). The system memory may be a readable and writable storage device or a volatile readable and writable storage device, such as a dynamic random access memory. The system memory may store some or all instructions and data required by the processor at run time. In addition, the memory may include any combination of computer-readable storage media, including various types of semiconductor memory chips (DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, the memory may include a readable and / or writable removable storage device, such as a laser disc (CD), a read-only digital versatile disc (e.g., DVD-ROM, double-layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (e.g., SD card, mini SD card, Micro-SD card, etc.), a magnetic floppy disk, etc. The computer-readable storage medium does not include carrier waves and transient electronic signals transmitted wirelessly or wired.

[0275] The memory stores executable codes, and when the executable codes are processed by the processor, the processor can execute part or all of the methods described above.

[0276] On the other hand, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the above method.

[0277] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0278] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the rights of the present application is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present application should be within the scope of the rights of the present application.

Claims

1. A method for wireless sensing-assisted high-frequency communication, characterized in that: The method comprises the following steps: Use cell-level signals for wireless sensing to obtain communication user distribution information and channel information; Obtaining communication user grouping information according to the communication user distribution information and the channel information; Wireless sensing assisted high frequency communication is completed according to the communication user grouping information.

2. The method according to claim 1, characterized in that The method of using cell-level signals for wireless sensing to obtain communication user distribution information and channel information includes the following steps: Set beamforming data; Setting a cell-level signal according to the beamforming data; Using the cell-level signal to perform wireless sensing to obtain an echo signal; Communication user distribution information and channel information are obtained according to the echo signal.

3. The method according to claim 2, characterized in that The formula used to set the beamforming data includes: s.t.γ≥γ min ; Among them, θ is the preset starting direction; Assume the scanning interval is Δθ, and the next scanning direction is θ=θ+Δθ; CRLB is the Cramer-Rao bound; γ represents the received signal-to-noise ratio of the communication user; γ min The signal-to-noise ratio threshold for receiving cell-level information of a communication user; P T is the transmission power of the base station; w is the beamforming vector of the base station; The receiving signal-to-noise ratio of the communication user and the transmitting power of the base station are used as beamforming data.

4. The method according to claim 1, characterized in that: The obtaining of communication user grouping information according to the communication user distribution information and the channel information comprises the following steps: Setting condition information; the condition information includes azimuth range condition information, channel difference condition information, and channel correlation condition information; According to the condition information, the communication user distribution information and the channel information, beam-level user grouping judgment information is obtained; the beam-level user grouping judgment information includes user azimuth range judgment information, user channel difference judgment information, and user channel correlation judgment information; According to the beam-level user grouping judgment information, if the communication user is not within a preset azimuth range, adding the communication user to a precoding group; According to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range and satisfies a channel difference condition, adding the communication user to a frequency reuse group; According to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range, does not meet a channel difference condition, and meets a channel correlation condition, then the communication user is added to the precoding group; According to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range and does not meet a channel difference condition and a channel correlation condition, then the communication user is added to a non-frequency reuse group; Communication user grouping information is obtained according to the precoding group, the frequency reuse group and the non-frequency reuse group.

5. The method according to claim 4, characterized in that According to the beam-level user grouping judgment information, if the communication user is within a preset azimuth range and satisfies a channel difference condition, the communication user is added to a frequency reuse group, and the formula used includes: Among them, Φ noma,j is the frequency multiplexing group data; j is the first communication user; u is the second communication user; h j is the channel gain between the first communication user and the base station; h u is the channel gain between the second communication user and the base station; is the noise power of the first communication user; is the noise power of the second communication user; θ j is the azimuth between the first communication user and the base station; θ u is the azimuth between the second communication user and the base station; Q thr is the channel difference threshold; θ thr is the orientation threshold; Ω is the set of communicating users.

6. The method according to claim 1, characterized in that The obtaining of communication user grouping information according to the communication user distribution information and the channel information comprises the following steps: Setting orthogonal multiple access condition information; Setting non-orthogonal multiple access condition information; According to the orthogonal multiple access condition information, the non-orthogonal multiple access condition information, the communication user distribution information and the channel information, user grouping judgment information based on the channel information is obtained; the user grouping judgment information based on the channel information includes user orthogonal multiple access condition judgment information and user non-orthogonal multiple access condition judgment information; According to the user grouping judgment information based on the channel information, if the communication user meets the orthogonal multiple access condition, adding the communication user to the non-frequency reuse group; According to the user grouping judgment information based on the channel information, if the communication user does not meet the orthogonal multiple access condition and does not meet the non-orthogonal multiple access condition, adding the communication user to the precoding group; According to the user grouping judgment information based on the channel information, if the communication user does not meet the orthogonal multiple access condition but meets the non-orthogonal multiple access condition, adding the communication user to the frequency reuse group; Communication user grouping information is obtained according to the non-frequency reuse group, the precoding group and the frequency reuse group.

7. The method according to claim 6, characterized in that The formula used to set the orthogonal multiple access condition information is include: Φ OMA,j ={u;r j,u >r thr,PRC ,CQ j,u <CQ thr,PRC ,u,j∈Ω}; l is the base station antenna; n is the wireless signal transmission attenuation coefficient; h j,l is the channel gain from the first communication user to the base station antenna; h u,l is the channel gain from the second communication user to the base station antenna; r j,u is a channel correlation coefficient between the first communication user and the second communication user; CQ j,u is a channel quality ratio coefficient between the first communication user and the second communication user; r thr,PRC is the channel correlation coefficient threshold of the frequency reuse group; CQ thr,PRC is the channel quality ratio coefficient threshold of the precoding group; φ OMA,j It is the orthogonal multiple access condition information.

8. The method according to claim 1, characterized in that The method of completing wireless sensing-assisted high-frequency communication according to the communication user grouping information includes the following steps: According to the communication user grouping information, a precoding group, a non-frequency reuse group, and a frequency reuse group are obtained; For the precoding group, using precoding to send signals on the same time-frequency resource; For the non-frequency multiplexing group, superposition coding is used to send signals on the same resource; For the frequency reuse group, different user data are sent in different time-frequency resources.

9. The method according to claim 1, characterized in that: The method further comprises: The base station obtains the communication user distribution information and the channel information through wireless sensing; The communication user distribution information includes the relative position of the communication user and the base station, and the relative distance between the communication user and the base station; The base station determines the communication user grouping information and the communication mode according to the communication user distribution information and the channel information; The base station notifies the corresponding terminal of communication scheduling information by responding to the scheduling request message of the terminal; the communication scheduling information includes the communication mode and communication resources; The communication mode includes a precoding mode, a frequency reuse mode and a non-frequency reuse mode; the frequency reuse mode includes non-orthogonal multiple access, and the non-frequency reuse mode includes orthogonal multiple access; the communication resources include time-frequency resources; The base station processes the user data based on the communication mode and transmits the processed data in the corresponding beam; The terminal processes the received data based on the communication mode; The communication mode is originally preset as a direct processing mode. If the communication mode is the precoding mode, data is processed based on a precoding matrix; if the communication mode is the superposition coding mode, data is processed based on serial interference elimination.

10. A wireless sensing assisted high frequency communication system, characterized in that: The system comprises: The first module is used to use cell-level signals for wireless sensing to obtain communication user distribution information and channel information; A second module is used to obtain communication user grouping information according to the communication user distribution information and the channel information; The third module is used to complete wireless sensing assisted high frequency communication according to the communication user group information; The wireless sensing submodule is used to obtain user channel status information and user distribution, and provide input for the user grouping submodule; A user grouping submodule is used to perform user grouping and divide users into a precoding group, a non-frequency reuse group and a frequency reuse group; The communication mode selection submodule is used to select a communication mode according to user group information.

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