User pairing method based on communication perception calculation deep fusion NOMA (Non-Orthogonal Multiple Access) technology

Abstract

The invention belongs to the technical field of communication, and discloses a user pairing method of a communication perception calculation deep fusion NOMA technology, which comprises the following steps of: configuring a parameter N and a signal-to-interference ratio threshold difference between NOMA pairing users in a parameter configuration mode in a base station; dividing the cell into a central area and an edge area based on fractional frequency multiplexing; based on soft frequency reuse, dividing a central region where the user meeting the NOMA pairing condition is located into an inner central region and an outer central region which are equal in area from inside to outside, and respectively dividing the inner central region and the outer central region into 2N NOMA pairing regions with equal central angles; positioning a current service user by adopting a user position sensing technology; and pairing the users meeting the NOMA pairing condition in the users in the inner central area and the outer central area. According to the method, NOMA pairing in a new-generation mobile communication system is simplified by utilizing a sensing and communication fusion technology, the system performance is improved, the actual scene of network deployment is considered, and the NOMA technology is not adopted for edge users with poor channel conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, in particular to a user pairing method of communication-aware computing deep fusion NOMA technology. BACKGROUND

[0002] The contradiction between the growing demand for mobile communication data and the limited wireless spectrum is the main contradiction that needs to be solved in the future 6G system. Improving spectral efficiency and reducing cell interference are two important tasks faced by the future 6G system. Non-orthogonal multiple access (NOMA) technology can significantly improve spectral efficiency and has become a key technology of 5G. It can meet the demand of low delay, large-scale connectivity and high throughput of future 6G system.

[0003] NOMA performs multiplexing by introducing new dimensions in the time domain, frequency domain and code domain, which can significantly improve the capacity of the fifth generation mobile communication network even with additional interference at the receiver. NOMA technology mainly adopts simultaneous service for multiple users on the same frequency resource to improve spectral efficiency, which is divided into power domain NOMA and code domain NOMA. Among them, power domain NOMA is the mainstream NOMA scheme of the fifth generation mobile communication system and has attracted widespread attention. Compared with the time domain, frequency domain, code domain or their combination multiple access scheme, NOMA can be realized in the power domain. Based on multi-user detection (MUD) algorithms such as successive interference cancellation (SIC), the interference caused by multiple users sharing the same time-frequency resource at the receiving side is detected. Compared with traditional orthogonal multiple access technology, NOMA improves spectral efficiency (SE) at the cost of increasing the complexity of the receiver. In addition, based on information theory, non-orthogonal multiplexing based on superposition coding at the transmitter and SIC at the receiver is not only superior to traditional orthogonal multiplexing, but also optimal from the perspective of system capacity.

[0004] The prior art related to user pairing of NOMA system includes the application patent with the application number 202110631944.9, a NOMA system user pairing and power allocation joint optimization method and device, which includes pairing each strong user and each weak user in the physical domain; determining the pairing scheme of the strong user and the weak user and the power allocation scheme when the expected value of the ergodic sum rate of all users is maximum; the patent adopts the method of maximizing the expected value of the ergodic sum rate of all users, and obviously, the operation amount of this method is large, the technical implementation is complex, and the cost is high. The application patent with the application number 201910732443.2, a multi-user pairing method based on modules in an uplink NOMA system, which includes that the base station sorts all users according to the user channel state information; the base station determines the grouping result according to the pairing method, and feeds back the grouping result and the statistical information of the position of each user to the user; the user determines the actual transmission power and the information transmission mode according to the feedback information of the base station, and transmits information; the base station decodes the received user signal; the patent requires the base station to sort all users according to the user channel state information, and when the number of users served by the base station is large, the time consumed by sorting is large, and the pairing process is complex. Therefore, it is necessary to explore the use of the sense algorithm fusion technology to simplify the NOMA pairing in the new generation of mobile communication system, and how to improve the pairing speed and then improve the performance of the NOMA technology under the consideration of the interval between the physical positions of the paired users has become a key problem to be solved. SUMMARY

[0005] The user pairing method of the communication sensing and computing deep fusion NOMA technology provided by the embodiments of the application is applied to the field of wireless communication technology, so as to solve the problems of complex user pairing process and low pairing speed of the existing NOMA technology. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This part is not a general review, nor is it intended to determine the key / important constituent elements or delineate the protection scope of these embodiments. Its only purpose is to present some concepts in a simple form as a prelude to the detailed description below.

[0006] According to a first aspect of the embodiments of the application, a user pairing method of the communication sensing and computing deep fusion NOMA technology is provided, including the following steps:

[0007] The signal-to-interference ratio threshold difference between the parameters N and the NOMA paired users is configured in the base station by the parameter configuration mode;

[0008] The cell is divided into a central area and an edge area based on fractional frequency reuse;

[0009] The central area where the user meeting the NOMA pairing condition is located is divided into an inner central area and an outer central area with equal area from inside to outside based on soft frequency reuse, and the inner central area and the outer central area are divided into 2N NOMA pairing areas with equal central angle respectively;

[0010] The base station adopts user location awareness technology to locate the currently served user to determine the area where the user is located;

[0011] The users in the inner central area and the outer central area where the user meeting the NOMA pairing condition exists are paired by NOMA.

[0012] On the basis of the above scheme, the step of dividing the cell into a central area and an edge area based on fractional frequency reuse further comprises:

[0013] The system bandwidth is also divided into an edge bandwidth and a central bandwidth;

[0014] The edge bandwidth is divided into three equal bandwidths for use by three adjacent users in the edge area of the cell.

[0015] On the basis of the above scheme, the central area where the user meeting the NOMA pairing condition is located is further divided into an inner central area and an outer central area with equal area from inside to outside based on soft frequency reuse, and on this basis, the inner central area and the outer central area are further divided into 2N NOMA pairing areas with equal central angle respectively, which specifically comprises:

[0016] S301: The inner central area and the outer central area of the cell are divided into 2N NOMA pairing areas with a central angle of 180 / N degrees respectively: for the inner central area, the area far from the base station and in the direction of the main lobe of the sector antenna is the first inner central area, denoted as inner area 1, and is named as the second inner central area, …, the 2N inner central area in turn according to the counterclockwise direction, denoted as inner area 2, …, inner area 2N respectively;

[0017] S302: The outer central area is divided into 2N areas with a central angle of 180 / N degrees: according to the naming rules of the inner central area, it is named as the first outer central area, the second outer central area, …, the 2N outer central area, denoted as outer area 1, outer area 2, …, outer area 2N respectively;

[0018] S303: The central bandwidth of the cell is divided into 2N+1 parts, namely C0, C1, …, C 2N ; wherein the bandwidth C0 is used by all non-NOMA users or users not meeting the NOMA pairing condition in the central area; the bandwidth C1, …, C 2N is used by NOMA users, wherein the bandwidth C iThe users in (i = 1, ..., 2N) who satisfy the NOMA pairing condition are assigned to inner zone i and outer zone j.

[0019] S304: Outer region j and inner region i are a pair of NOMA user paired regions, and the relationship between j and i satisfies the following formula:

[0020]

[0021] In the formula, inner region i and outer region j are two specified NOMA user pairing regions, and N is a positive integer.

[0022] Based on the above scheme, the steps for determining the user's location by using user location-aware technology to locate the currently serving user in the NOMA pairing area with equal central angles include:

[0023] The base station determines the corresponding cell based on the user's serving sector.

[0024] Based on the above scheme, the step of the base station determining the corresponding cell according to the serving sector where the user is located specifically includes:

[0025] Assuming the cell center coordinates are represented as (x0, y0), the base station determines the location coordinates of the k-th user using its own positioning technology as (x0, y0). k ,y k The distance r from user k to the center of the cell can be calculated using the formula for the distance between two points. k for:

[0026]

[0027] The angle between the vector from the cell center to user k and the direction of the antenna main lobe is represented by θ. k for:

[0028]

[0029] Among them, tan -1 () is the arctangent function, so we use the parameter r k and θ k The region Z where user k is located can be obtained through calculation. k The determination method is as follows:

[0030]

[0031] Where parameter r represents the side length of the regular hexagonal cell, r1 represents the side length of the regular hexagonal cell in the outer central region, and r2 represents the side length of the regular hexagonal cell in the outer central region. The calculation method for m in the above formula is as follows:

[0032]

[0033] in, This is the floor function.

[0034] Based on the above scheme, the step of performing NOMA pairing for users in the inner central region and outer central region who meet the NOMA pairing conditions includes:

[0035] Define inner region i and outer region j as a pair of NOMA user pairing regions;

[0036] For users within a pairing region who support NOMA and require resource allocation, their SINR (Signal Dryness Ratio) is arranged in descending order, with users having higher SINR at the top of the queue and users having lower SINR at the bottom.

[0037] After completing the SINR sorting for users in inner zone i and outer zone j who support NOMA and need to be allocated resources, the SINR queues of the two zones are defined as inner zone queue i and outer zone queue j, respectively. The users in inner zone queue i consist of users in inner zone i who support NOMA and need to be allocated resources, and the users in outer zone queue j consist of users in inner zone j who support NOMA and need to be allocated resources.

[0038] First, select user P with the highest information-to-dryness ratio from queue i in the inner zone. m1 Then, search from top to bottom in the outer queue j for results that satisfy P. m1 The absolute value of the difference between SINR values ​​is greater than a pre-set SINR threshold difference. User P n1 Perform NOMA user transmission pairing; then select the user P with the highest signal-to-dryness ratio from the remaining users in the inner queue i. m2 Then, from the remaining users in the outer queue j, search from top to bottom for those who satisfy P. m2 The absolute value of the difference between SINR values ​​is greater than a pre-set SINR threshold difference. User P n2 Perform NOMA user transmission pairing; and so on, find all paired users in inner area i and outer area j that meet the NOMA pairing transmission requirements.

[0039] Similarly, following the above method, NOMA pairing is completed sequentially for all users in the 2N pairing regions that meet the NOMA pairing transmission requirements.

[0040] Based on the above scheme, the step of performing NOMA pairing for users in the inner central region and outer central region who meet the NOMA pairing conditions further includes:

[0041] The users in the inner zone queue i and the outer zone queue j that do not satisfy the NOMA pairing condition are allocated resources in a manner of normal user resource allocation.

[0042] According to a second aspect of the embodiment of the present application, a user pairing device of a communication-aware and computation-deeply-fused NOMA technology is provided, comprising:

[0043] The parameter configuration module is configured to configure the parameter N and the difference between the signal-to-interference ratio thresholds of the NOMA paired users in the base station in a manner of parameter configuration.

[0044] The cell division module is configured to divide the cell into a central area and an edge area based on fractional frequency reuse.

[0045] The central area division module is configured to divide the central area where the users satisfying the NOMA pairing condition are located into an inner central area and an outer central area with equal areas from inside to outside based on soft frequency reuse, and divide the inner central area and the outer central area into 2N NOMA pairing areas with equal central angles respectively.

[0046] The user positioning module is configured to position the currently served users by using a user location-aware technology to determine the areas where the users are located.

[0047] The pairing module is configured to pair the users in the inner central area and the outer central area that satisfy the NOMA pairing condition by NOMA.

[0048] According to a third aspect of the embodiment of the present application, a computer readable storage medium is provided.

[0049] In some embodiments, the computer readable storage medium comprises a computer program for saving, wherein the computer program is executed by a processor to realize the steps of the user pairing method of the communication-aware and computation-deeply-fused NOMA technology.

[0050] According to a fourth aspect of the embodiment of the present application, a computer device is provided.

[0051] In some embodiments, the computer device comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the steps of the user pairing method of the communication-aware and computation-deeply-fused NOMA technology.

[0052] The technical solution provided by the embodiment of the present application can include the following beneficial effects:

[0053] The sense of the present application is a fast pairing method of NOMA fusion, which includes a cell segmentation technology based on frequency reuse, a user location awareness technology and a NOMA user fast pairing technology. The cell segmentation technology based on frequency reuse first divides the cell into an edge area and a center area by using the FFR technology, further divides the center area where the users meeting the NOMA pairing condition exist into an inner center area and an outer center area with equal areas by using the SFR technology, and finally divides the inner and outer center areas into 2N NOMA pairing areas with a center angle of 180 / N degrees in order to realize the requirement of fast pairing of NOMA users. The NOMA pairing areas with equal center angles use the user location awareness technology to locate the currently served users, thereby determining the area where the users are located, and realize the fast pairing of NOMA users by using the NOMA user fast pairing technology. The present application simplifies the NOMA pairing in the new generation mobile communication system by using the sense of fusion technology in view of the complexity of the existing NOMA pairing technology, improves the system performance, and considers the actual scene of network deployment, and does not use the NOMA technology for the edge users with poor channel conditions.

[0054] 1) The system configuration method is used for the key parameters, which is convenient for management and maintenance, and the number of users paired by NOMA can be adjusted by properly adjusting the parameters: when the SINR threshold difference is larger, the users meeting the NOMA pairing are less, and when the SINR threshold difference is smaller, the users meeting the NOMA pairing are more, and the performance of the NOMA pairing technology can be flexibly adjusted by the parameter configuration method.

[0055] 2) The two users meeting the NOMA pairing are relatively far away, and by using the technology provided by the present application, all the users meeting the NOMA pairing in the system are relatively far away and have small variance of distance, and this pairing technology can obviously improve the system performance.

[0056] 3) The present application comprehensively uses the partial frequency reuse technology, the soft frequency reuse technology and the cell segmentation technology, which greatly improves the system performance of the NOMA technology.

[0057] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0058] The drawings herein are incorporated into the specification and form a part of the specification, which show the embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application.

[0059] Figure 1 ​​is a network model diagram illustrating a 3-sector base station composed of a cell divided into a center region and an edge region based on fractional frequency reuse according to an exemplary embodiment, wherein (a) is a cell division and spectrum allocation of each region based on a fractional frequency reuse network model, and (b) is a system bandwidth division based on fractional frequency reuse;

[0060] Figure 2 is a cell division diagram of frequency reuse according to an exemplary embodiment, wherein (a) is a cell division diagram, (b) is a maximum transmit power density upper limit (PDL) allowed for a user located in an edge region of a cell, an outer center region user, and an inner center region user, and (c) is a cell center bandwidth division diagram;

[0061] Figure 3 is a cell division diagram of frequency reuse for N=3 according to an exemplary embodiment, wherein (a) is a cell division diagram, (b) is a maximum transmit power density upper limit (PDL) allowed for a user located in an edge region of a cell, an outer center region user, and an inner center region user, and (c) is a cell center bandwidth division diagram;

[0062] Figure 4 is a structure diagram of a user pairing device of a communication and sensing computing deep fusion NOMA technology according to an exemplary embodiment;

[0063] Figure 5 is a structure diagram of a computer device according to an exemplary embodiment. DETAILED DESCRIPTION

[0064] The following description and drawings are illustrative of the specific embodiments herein and are not intended to be limiting. Parts and features of some embodiments can be included or replaced by parts and features of other embodiments. The scope of the embodiments herein includes the whole area of possibilities that is encompassed by the claims and any available equivalents of the claims. In this document, the terms "first", "second" and the like, do not denote any ordinal, sequential or chronological relationship, but are used just to distinguish one element from another. In fact, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a structure, device or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such structure, device or apparatus. An element proceeded by "comprises... a" does not, without further constraints, exclude the presence of additional identical elements in the structure, device or apparatus. The various embodiments are described in a progressive manner, each embodiment focusing on the differences with respect to the other embodiments, and the same or similar parts between the various embodiments are cross-referenced.

[0065] In this document, the character " / " denotes an "or" relationship between the preceding and following objects. For example, A / B means A or B.

[0066] In this document, the term "and / or" is a description of an association between objects, indicating that there can be three relationships. For example, A and / or B means the three relationships of A or B, or A and B.

[0067] The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0068] Embodiment 1

[0069] This embodiment shows an embodiment of the user pairing method of the communication-aware computing deep fusion NOMA technology of the present application, including the following steps:

[0070] S1: In the base station, configure the parameters N=3 and the signal-to-interference ratio threshold difference between NOMA paired users by parameter configuration.

[0071] S2: Divide the cell into an edge area and a center area based on fractional frequency reuse;

[0072] S3: Based on the soft frequency reuse technology, divide the center area from inside to outside into an inner center area and an outer center area with equal areas, and on this basis, further divide the inner center area and the outer center area into 6 NOMA pairing areas with a center angle of 60 degrees.

[0073] S4: The base station uses user location awareness technology to locate the currently serving user in order to determine the user's location.

[0074] NOMA pairing is performed on users in the inner and outer central regions who meet the NOMA pairing criteria.

[0075] S5: As Figure 1 As shown, as a specific technical solution, the step of dividing the cell into edge and center regions based on fractional frequency reuse further includes:

[0076] The system bandwidth is also divided into edge bandwidth and center bandwidth;

[0077] The edge bandwidth is divided into three equal bandwidths for use by three adjacent users within the edge area of ​​the cell.

[0078] like Figure 2 As shown, as a specific technical solution, the soft frequency reuse technology divides the central region into an inner central region and an outer central region with equal areas from the inside out. On this basis, the inner central region and the outer central region are further divided into 6 NOMA pairing regions with a central angle of 60 degrees.

[0079] include:

[0080] In this embodiment, the inner central region and the outer central region are each divided into 6 regions; wherein, if the regular hexagon is described as an approximation of a circle, the inner central region is a circle with a radius of r1, and the outer central region is an annular region with a radius of r2-r1;

[0081] Specifically, based on soft frequency reuse technology, the allowed transmit power spectral density upper limit (PDL) is as follows: [e.g., ...] Figure 2 As shown in (b);

[0082] S301: Divide the central area of ​​the cell into 6 areas with an angle of 60 degrees: For the inner central area, the area that is far from the base station and is in the direction of the main lobe of the sector antenna is the inner central area one, which is denoted as inner area 1. Then, in the counterclockwise direction, they are named inner central area two, ..., inner central area six, which are denoted as inner area 2, ..., inner area 6 respectively.

[0083] The direction of the main lobe is the direction in which the antenna gain is the greatest.

[0084] S302: The outer central region is divided into 6 regions with an included angle of 60 degrees: according to the naming rules of the inner central region, they are named as outer central region one, outer central region two, …, outer central region six, respectively, and are represented as: outer region 1, outer region 2, …, outer region 6;

[0085] S303: The center bandwidth of the cell is divided into 7 parts, namely C0, C1, …, C6; wherein, the bandwidth C0 is used by all non-NOMA users and users not meeting the NOMA pairing in the central region; the bandwidth C1, …, C6 is used by the NOMA pairing users, wherein, the bandwidth C i is allocated to the NOMA pairing users in the inner region i and the outer region j.

[0086] S304: The outer region j and the inner region i are the NOMA user pairing regions, and the relationship between j and i satisfies the following formula:

[0087]

[0088] In the formula, the inner region i and the outer region j are two designated NOMA user pairing regions.

[0089] As a specific technical solution, the NOMA pairing region with equal central angles adopts user position sensing technology to locate the currently served users to determine the region where the user is located, and the step includes:

[0090] The base station determines the corresponding cell according to the service sector where the user is located.

[0091] Specifically, assuming that the cell center coordinates are represented as (x0, y0), the sectors in the base station use the positioning technology of the 5G or 6G system, and one of the most common methods is to use multi-base station joint positioning. Under the condition that the current cell center coordinates are represented as (x0, y0), the position coordinates of the kth user are calculated as (x k ,y k ) by using the time difference of arrival of signals and signal propagation model information through multiple base stations receiving signals sent by user equipment at the same time. According to the distance formula between two points, the distance r k from the user k to the cell center can be calculated as:

[0092]

[0093] The included angle between the vector from the cell center to the user k and the main lobe direction of the antenna is represented as θ k :

[0094]

[0095] Wherein, tan -1() is the arctangent function, so we use the parameter r k and θ k The region Z where user k is located can be obtained through calculation. k The determination method is as follows:

[0096]

[0097] Where parameter r represents the side length of the regular hexagonal cell, r1 represents the side length of the regular hexagonal cell in the outer central region, and r2 represents the side length of the regular hexagonal cell in the outer central region.

[0098] The method for calculating m in the above formula (4) is as follows:

[0099]

[0100] in, This is the floor function.

[0101] As a specific implementation, the step of performing NOMA pairing for users in the inner central region and the outer central region who meet the NOMA pairing conditions includes:

[0102] S501: First, resource allocation is performed using inner region 1 (i=1) and outer region 4 (j=4) as the first NOMA pairing region;

[0103] S502: The Signal to Interference plus Noise Ratio (SINR) of users located in Inner Zone 1 and Outer Zone 4 who support NOMA technology and require resource allocation are arranged in descending order;

[0104] S503: After completing the user SINR sorting, the two SINR queues of inner zone 1 and outer zone 4 are defined as inner zone queue 1 and outer zone queue 4, respectively. Inner zone queue 1 consists of users in inner zone 1 who are waiting to be allocated resources and who support NOMA technology, and outer zone queue 4 consists of users in outer zone 4 who are waiting to be allocated resources and who support NOMA technology.

[0105] S504: First, select user P with the highest information drying ratio from inner queue 1. m1 Then, search from top to bottom in outer queue 4 for results that satisfy P. m1 The absolute value of the difference between SINR values ​​is greater than a pre-set SINR threshold difference. User P n1 Perform NOMA user transmission pairing and pair NOMA user P. m1 and P n1 Resources are allocated from bandwidth C1 according to NOMA-paired users; then, the user P with the highest signal-to-dryness ratio is selected again from the remaining users in inner queue 1.m2 Then, from the remaining users in the outer queue 4, search from top to bottom for the user P m2 whose absolute value of difference between SINR and SINR of P is greater than a pre-set SINR threshold difference n2 Perform NOMA user pairing for P m2 and P n2 ; and allocate resources to them from the bandwidth remaining in C1; and so on until all users in the inner queue 1 and the outer queue 4 that meet the NOMA pairing condition are paired and resources are allocated, or the bandwidth of C1 is fully allocated.

[0106] S505: For users in the inner queue 1 and the outer queue 4 that do not meet the NOMA pairing condition, allocate resources to them from the bandwidth C0 in the manner of normal user resource allocation, i.e., each user occupies time-frequency resources exclusively and users do not share time-frequency resources.

[0107] S506: After completing resource allocation for users in the first pair of paired regions, continue to pair and allocate resources for users in the second pair of NOMA paired regions, which in this embodiment are the inner region 2 and the outer region 5. Similarly, perform steps S502 to S505, allocate resources to users in the second pair of NOMA paired regions that meet the NOMA pairing condition from the bandwidth C2, and allocate resources to users in the second pair of NOMA paired regions that do not meet the NOMA pairing condition from the bandwidth C0 in the manner of normal user resource allocation, i.e., each user occupies time-frequency resources exclusively and users do not share time-frequency resources.

[0108] S507: Complete NOMA pairing and resource allocation for the third pair of NOMA paired regions, the inner region 3 and the outer region 6, the fourth pair of NOMA paired regions, the inner region 4 and the outer region 1, the fifth pair of NOMA paired regions, the inner region 5 and the outer region 2, and the sixth pair of NOMA paired regions, the inner region 6 and the outer region 3, in the same manner as described above.

[0109] Another implementation of the NOMA pairing method in a pair of NOMA paired regions is to select two pairs of users for pairing at a time, i.e., select the user with the maximum SINR and the user with the minimum SINR from the inner queue i, and then select the user with the maximum SINR and the user with the minimum SINR from the outer queue j. Pair the user with the maximum SINR in one queue with the user with the minimum SINR in the other queue, and pair users that meet the pairing condition, as described in detail in Embodiment 2.

[0110] Example 2

[0111] Based on Example 1, this example uses... Figure 3 The cell segmentation diagram for frequency reuse when N=3 is shown to illustrate a specific implementation of this application.

[0112] 1. Cell division technology

[0113] First, the network administrator completes the system parameter N and SINR threshold difference. The configuration involves dividing each cell in the managed network into cell edge areas (non-NOMA user pairing areas) and cell center areas (suitable for NOMA user pairing) using fractional frequency reuse (FFR technology). Simultaneously, cell bandwidth is allocated according to FFR technology, dividing it into center bandwidth and edge bandwidth. The edge bandwidth is further divided into three parts, allocated to the edge bandwidth of three adjacent cells. Unlike traditional FFR technology for edge area division, this invention requires that users located in edge cells have a greater than 95% probability of not meeting NOMA technology transmission requirements; or even if the users meet the NOMA pairing requirements, pairing any of these users with the user with the best SINR in the current cell will severely impact the user's QoS (Quality of Service) or the cell's KPI (Key Performance Indicator).

[0114] The cell center area (suitable for NOMA user pairing area) is further divided into an inner center area and an outer center area according to soft frequency reuse (SFR technology). The maximum transmit power spectral density allowed for users in the inner center area and the outer center area are different, or the maximum transmit power spectral density of the base station for users is different. The maximum transmit power spectral density allowed for users in the outer center area is greater than that for users in the inner center area. The specific transmit power spectral density for each user depends on the base station's power control technology or power allocation technology.

[0115] Here, N=3 and SINR threshold difference are used. The implementation process of this invention will be explained using an example: First, the cell segmentation technology uses fractional frequency reuse (FFR) and soft frequency reuse (SFR) to divide the cell into three concentric regions: the cell edge region, the outer center region, and the inner center region, with the inner center region having the same area as the outer center region. Second, the cell segmentation technology further divides the central region of the cell (including the inner center region and the outer center region) into six regions with an angle of 60 degrees, such as...Figure 3 As shown, for the inner central region far from the base station and in the direction of the sector antenna main lobe, one region is denoted as an inner region 1, and then sequentially named as an inner central region two, an inner central region three, an inner central region four, an inner central region five, and an inner central region six in a counterclockwise direction, denoted as: inner region 2, inner region 3, inner region 4, inner region 5, inner region 6; six sub-regions of the outer central region: outer central region one, outer central region two, outer central region three, outer central region four, outer central region five, and outer central region six, denoted as outer region 1, outer region 2, outer region 3, outer region 4, outer region 5, and outer region 6. Correspondingly, the central bandwidth of the cell is divided into seven parts, namely C0, C1, C2, C3, C4, C5, and C6, denoted as C i (i = 0, 1, 2, 3, 4, 5, 6), as Figure 3 (c) Bandwidth C0 is used by all non-NOMA users and users not meeting NOMA pairing in the central region; bandwidths C1, …, C6 are used by NOMA pairing users, and bandwidth C i The NOMA pairing users in the inner region i and the outer region j are allocated to two sub-regions, and for the convenience of describing this embodiment, the inner region i and the outer region j are also called two pairing regions. The variables i and j satisfy the following relationship:

[0116]

[0117] 5G R16 introduces new positioning reference signals (PRS) to improve positioning accuracy using multiple positioning technologies. According to the definition of 3GPP R16, for 80% of existing terminals, the vertical and horizontal positioning accuracy is better than 3 meters. At the same time, due to the increase in the number and diversity of reference points in the 5G ultra-dense network, the multi-beam of 5G multi-antenna technology allows more accurate Angle of Arrival (AoA) estimation, and lower network latency can improve the accuracy of time-based measurements. These advantages can further enhance the positioning capabilities of 5G. Existing 5G positioning technologies and future 6G positioning technologies can meet the accuracy requirements of the user location awareness technology.

[0118] 2. The base station determines the region where the user is located based on the user location awareness technology

[0119] The base station determines the corresponding cell according to the service sector where the user is located. Assuming that the center coordinates of the cell are represented as (x0, y0), the base station determines the location coordinates of the kth user as (xk, yk) using existing positioning technologies, such as multi-base station joint positioning technology. k k According to the distance formula between two points, the distance r k from the user k to the center of the cell can be calculated as:​

[0120]

[0121] The angle between the vector from the cell center to user k and the direction of the antenna main lobe is represented by θ. k for:

[0122]

[0123] Where tan -1 () is the arctangent function, so we use the parameter r k and θ k The region Z where user k is located can be obtained through calculation. k The determination method is as follows:

[0124]

[0125] The calculation method for m in the above formula is as follows:

[0126]

[0127] in, This is the floor function.

[0128] Using the method described above, each user can be divided into corresponding regions.

[0129] 3. NOMA User Quick Matching Technology

[0130] According to the NOMA cell segmentation technique, users are paired in inner cell i and outer cell j, which is the case in this embodiment. and Completed within the region; for ease of description. and The regions become paired regions. Before each resource allocation, firstly, the paired regions are... and The Signal-to-Interference-plus-Noise Ratio (SINR) of users who support NOMA and require resource allocation is sorted in descending order from high to low. After SINR sorting, two SINR queues are defined as inner queue i and outer queue j, respectively. Inner queue i consists of users located in the region... The outer queue j consists of users who support NOMA technology and are awaiting resource allocation, and is located in the region. The user group that supports NOMA technology and has resources to be allocated is selected. Then, the user P with the highest information drying ratio is selected from the inner queue i. m1 And select the user P with the smallest SINR from the outer queue j. n1 If user Pn1 With user P m1 If the absolute value of the difference between the required SINR values ​​is greater than a preset SINR threshold difference of 3dB, then user P... m1 With P n1 For a pair of NOMA-paired users, the user P with the smallest signal-to-dryness ratio is selected from the inner queue i. m2 And select the user P with the largest SINR from the outer queue j. n2 If user P n2 With user P m2 If the absolute value of the difference between the required SINR values ​​is greater than a preset SINR threshold difference of 3dB, then user P... n2 With user P m2 Users who are also selected as NOMA-paired users are then paired up. Following the same method, two users are selected from each of the two paired queues one at a time. If at least one pair of users satisfies the NOMA pairing condition, the process continues until neither of the selected pairs satisfies the NOMA pairing condition. Users in inner queue i and outer queue j who are not suitable for NOMA pairing are allocated resources using the normal user resource allocation method.

[0131] The NOMA fast pairing technique in this embodiment is summarized as follows:

[0132]

[0133] The above fully implements the NOMA fast pairing algorithm proposed in this invention. During user communication, the eNodeB not only needs to sense the user's location in real time, but also needs to calculate the SINR of each user in real time to achieve fast NOMA pairing.

[0134] Example 3

[0135] Based on Example 1, such as Figure 4 The diagram shows a user pairing device based on NOMA technology with deep fusion of communication-aware computing. This application discloses a user pairing device based on NOMA technology with deep fusion of communication-aware computing, comprising:

[0136] Parameter configuration module 1 is used to configure the signal-to-dryness ratio threshold difference between parameter N and NOMA paired users in the base station through parameter configuration.

[0137] Cell division module 2 is used to divide a cell into a central area and an edge area based on fractional frequency reuse;

[0138] The central region division module 3 is used to divide the central region where users who meet the NOMA pairing conditions are located into an inner central region and an outer central region with equal areas from the inside out based on soft frequency reuse, and to divide the inner central region and the outer central region into 2N NOMA pairing regions with equal central angles respectively.

[0139] User positioning module 4: The base station uses user location awareness technology to locate the currently serving user in order to determine the user's location area;

[0140] Pairing module 5 is used to perform NOMA pairing between users in the inner central area and the outer central area who meet the NOMA pairing conditions.

[0141] In one embodiment, such as Figure 5 The schematic diagram of the computer device shown illustrates a computer device, which can be a server, and its internal structure can be as follows. Figure 5 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores static and dynamic information data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps in the above method embodiments.

[0142] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the computer device to which the present invention is applied. A specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0143] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0144] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the method embodiments described above.

[0145] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of each method can be included. Wherein, any reference to memory, storage, database or other medium used in each embodiment of the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc.

[0146] In summary, the present application simplifies the NOMA pairing in the new generation mobile communication system by using the sense-on algorithm fusion technology, improves the system performance, and considers the actual scene of network deployment, and does not use the NOMA technology for the edge users with poor channel conditions. The present application mainly includes three key technologies, which are cell segmentation technology based on frequency reuse, user location sensing technology and NOMA user rapid pairing technology. The cell segmentation technology based on frequency reuse first divides the cell into edge area and center area based on fractional frequency reuse (FFR technology), further divides the center area where the users meeting the NOMA pairing conditions are located into inner center area and outer center area based on soft frequency reuse (SFR technology), and finally divides the inner and outer center areas into 2N different areas in order to realize the requirement of rapid pairing of NOMA users. The base station uses the user location sensing technology to locate the currently served users, so as to determine the area where the users are located. Finally, the rapid pairing of NOMA users is realized through the NOMA user rapid pairing technology. The present application divides the cell users into different areas based on the cell segmentation technology, improves the pairing speed, and effectively improves the NOMA performance because the physical positions of the paired users are far apart and uniformly distributed. At the same time, the fractional frequency reuse (FFR technology) and soft frequency reuse (SFR technology) are flexibly used in combination with the NOMA technology to improve the system performance.

[0147] The present application is not limited to the structures already described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A user pairing method for NOMA technology that deeply integrates communication-aware computing, characterized in that, Includes the following steps: In the base station, the signal-to-dryness ratio threshold difference between parameter N and NOMA paired users is configured through parameter configuration. Cells are divided into central and peripheral areas based on fractional frequency reuse. Based on soft frequency reuse, the central area where users who meet the NOMA pairing conditions are located is divided from the inside out into an inner central area and an outer central area of ​​equal area, and the inner central area and the outer central area are further divided into 2N NOMA pairing areas with equal central angles. NOMA pairing areas with equal central angles use user location-aware technology to locate the currently serving user in order to determine the user's location. NOMA pairing is performed on users in the inner and outer central regions who meet the NOMA pairing criteria.

2. The user pairing method of NOMA technology with deep fusion of communication-aware computing as described in claim 1, characterized in that, The step of dividing a cell into a central region and an edge region based on fractional frequency reuse further includes: The system bandwidth is also divided into edge bandwidth and center bandwidth; The edge bandwidth is divided into three equal bandwidths for use by three adjacent users within the edge area of ​​the cell.

3. The user pairing method of NOMA technology with deep fusion of communication-aware computing as described in claim 1, characterized in that, The step of dividing the central region where users satisfying the NOMA pairing condition are located into an inner central region and an outer central region of equal area from the inside out based on soft frequency reuse, and further dividing the inner central region and the outer central region into 2N NOMA pairing regions with equal central angles, includes: S301: Divide the central area of ​​the community into an inner central area and an outer central area of ​​equal size, and then further divide the inner central area and the outer central area into 2N areas with a central angle of 180 / N degrees. For the inner center region, the region that is far from the base station and is in the direction of the main lobe of the sector antenna is called inner center region one, which is denoted as inner region 1. The regions are named inner center region two, ..., inner center region 2N in a counterclockwise direction, respectively denoted as inner region 2, ..., inner region 2N. S302: Divide the outer central region into 2N regions with a central angle of 180 / N degrees: according to the naming rules of the inner central region, name them as outer central region one, outer central region two, ..., outer central region 2N, respectively, represented as: outer region 1, outer region 2, ..., outer region 2N; S303: Divide the central bandwidth of the cell into 2N+1 parts, namely C0, C1, ..., C 2N Among them, bandwidth C0 is used by all non-NOMA users or users who do not meet the NOMA pairing conditions within the central area; bandwidths C1, ..., C 2N For use by NOMA paired users, where bandwidth C i NOMA paired users (i = 1, ..., 2N) assigned to inner zone i and outer zone j; S304: Outer region j and inner region i are a pair of NOMA user paired regions, and the relationship between j and i satisfies the following formula: In the formula, inner region i and outer region j are two specified NOMA user pairing regions, and N is a positive integer.

4. The user pairing method of NOMA technology with deep fusion of communication-aware computing as described in claim 3, characterized in that, The steps for determining the user's location by using user location-aware technology to locate the currently serving user in the NOMA pairing region with equal central angles include: The base station determines the corresponding cell based on the user's serving sector.

5. The user pairing method of NOMA technology with deep fusion of communication-aware computing as described in claim 4, characterized in that, The step of the base station determining the corresponding cell based on the user's serving sector specifically includes: Assuming the cell center coordinates are represented as (x0, y0), the base station determines the location coordinates of the k-th user as (x0, y0). k ,y k The distance r from user k to the center of the cell can be calculated using the formula for the distance between two points. k for: The angle between the vector from the cell center to user k and the direction of the antenna main lobe is represented by θ. k for: Among them, tan -1 () is the arctangent function, so we use the parameter r k and θ k The region Z where user k is located can be obtained through calculation. k The determination method is as follows: Where parameter r represents the side length of the regular hexagonal cell, r1 represents the side length of the regular hexagonal cell in the outer central region, and r2 represents the side length of the regular hexagonal cell in the outer central region. The method for calculating m in formula (4) is as follows: in, This is the floor function.

6. The user pairing method of NOMA technology with deep fusion of communication-aware computing as described in claim 5, characterized in that, The steps for performing NOMA pairing between users in the inner and outer central regions that meet the NOMA pairing conditions include: Define inner region i and outer region j as a pair of NOMA user pairing regions; The SINR of users in a pair of paired regions who support NOMA and require resource allocation are arranged in descending order. After completing the SINR sorting for users in inner zone i and outer zone j who support NOMA and need to be allocated resources, the resulting two SINR queues are defined as inner zone queue i and outer zone queue j, respectively. The users in inner zone queue i consist of users in inner zone i who need to be allocated resources, and the users in outer zone queue j consist of users in inner zone j who need to be allocated resources. First, select user P with the highest information-to-dryness ratio from the inner queue i. m1 Then, search from top to bottom in the outer queue j for results that satisfy P. m1 The absolute value of the difference between SINR values ​​is greater than a pre-set SINR threshold difference. User P n1 Perform NOMA user transmission pairing; then select the user P with the highest signal-to-dryness ratio from the remaining users in the inner queue i. m2 Then, from the remaining users in the outer queue j, search from top to bottom for those who satisfy P. m2 The absolute value of the difference between SINR values ​​is greater than a pre-set SINR threshold difference. User P n2 Perform NOMA user transmission pairing; and so on, find all paired users in inner area i and outer area j that meet the NOMA pairing transmission requirements; Following the above method, complete the NOMA pairing of all users in the 2N pairing areas who meet the NOMA pairing transmission requirements in sequence.

7. The user pairing method of NOMA technology with deep fusion of communication-aware computing as described in claim 6, characterized in that, The step of performing NOMA pairing for users in the inner and outer central regions that meet the NOMA pairing conditions further includes: Users in inner queue i and outer queue j who do not meet the NOMA pairing condition will be allocated resources using the same method as ordinary users.

8. A user pairing device using NOMA technology that deeply integrates communication-aware computing, characterized in that, include: The parameter configuration module (1) is used to configure the signal-to-dryness ratio threshold difference between parameter N and NOMA paired users in the base station by means of parameter configuration; Cell division module (2) is used to divide a cell into a central area and an edge area based on fractional frequency reuse; The central region division module (3) is used to divide the central region where the user who meets the NOMA pairing condition is located into an inner central region and an outer central region with equal area from the inside to the outside based on soft frequency reuse, and divide the inner central region and the outer central region into 2N pairs of NOMA pairing regions with equal central angles respectively. The user positioning module (4) is used to locate the user currently being served by using user location awareness technology in NOMA pairing areas with equal central angles, so as to determine the area where the user is located. The pairing module (5) is used to perform NOMA pairing between users in the inner central region and the outer central region who meet the NOMA pairing conditions.

9. A computer-readable storage medium, characterized in that, Used to store a computer program, wherein the computer program, when executed by a processor, implements the steps of the user pairing method of the NOMA technology of communication-aware computing deep fusion as described in any one of claims 1-7.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the user pairing method of the NOMA technology of communication-aware computing deep fusion as described in any one of claims 1-7.

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