CN117769050A

CN117769050A - Multi-user multi-input multi-output terminal judging method, electronic equipment and system

Info

Publication number: CN117769050A
Application number: CN202311864768.9A
Authority: CN
Inventors: 张斌; 刘桂栋; 丁勇
Original assignee: Baicells Technologies Co Ltd
Current assignee: Baicells Technologies Co Ltd
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-03-26

Abstract

The method comprises the steps of determining candidate sub-machine sets of all terminal equipment in a FWA network in a random access process, determining different terminal equipment capable of carrying out MU-MIMO among different sub-machines according to the candidate sub-machine sets of all terminal equipment after the terminal equipment successfully resides in a cell, so as to realize the purpose that different terminals among different sub-machines can adopt the same wireless spectrum resources to carry out service in the same transmission time interval, realize the improvement of the system capacity of a single cell, and solve the opposite problems of large data volume service requirements and too few wireless spectrum resources faced by a base station of a distributed massive MU-MIMO networking system.

Description

Multi-user multi-input multi-output terminal judging method, electronic equipment and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for determining a terminal with multiple user multiple inputs and multiple outputs.

Background

A distributed massive Multi-user Multiple-Input Multiple-Output (MU-MIMO) system can assume a continuous coverage scenario, which is responsible for providing data services by one base station. As shown in fig. 1, a base station in a distributed massive MU-MIMO system can be split into two parts: and the baseband processing unit and the submachine. In a distributed massive MU-MIMO networking scenario, for a cell provided by a distributed massive MU-MIMO system: the number of BBUs is usually one, and is set in a central control room as a host; the number of the sub-machines can be multiple, and the plurality of sub-machines are arranged at different geographic positions so as to realize wide area continuous coverage.

Since the distributed massive MU-MIMO system provides one cell, only the radio spectrum resources of one cell can be allocated for all the terminal devices within the coverage area of the cell. At present, a scheme is proposed for realizing that limited radio spectrum resources meet service requirements of all terminal devices in a cell coverage area as far as possible through MU-MIMO, specifically, different terminal devices capable of using the same radio spectrum resources to perform services at the same time between different sub-machines are determined, and the terminal devices can use the same radio spectrum resources to perform services respectively. However, how to determine different terminal devices under a base station that can perform MU-MIMO between different sub-machines currently lacks a viable scheme.

Disclosure of Invention

The application provides a multi-user multi-input multi-output terminal judging method, device and system, which realize that different terminal devices capable of carrying out MU-MIMO among different sub-machines under a base station are determined.

In a first aspect, the present application provides a method for determining a terminal for multiple user multiple input multiple output, applied to a fixed wireless access (Fixed Wireless Access, FWA) network, where the FWA network includes: a distributed massive multi-user multiple-input multiple-output system and a plurality of terminal devices, wherein the distributed massive multi-user multiple-input multiple-output system corresponds to a cell, the distributed massive multi-user multiple-input multiple-output system comprises a baseband processing Unit (BBU) and a plurality of sub-machines, and the position of the terminal devices in the coverage area of the cell is fixed; the method is applied to the BBU, and the method comprises the following steps:

Receiving first information sent by one or more first sub-machines respectively; wherein the one or more first sub-machines comprise all sub-machines in the FWA network, which receive random access requests sent by one or more first terminal devices respectively on the same physical random access channel (Physical Random Access Channel, PRACH), the preambles carried by the random access requests sent by the one or more first terminal devices respectively are the same, and the first information comprises a received signal strength indication (Received Signal Strength Indicator, RSSI) of the PRACH detected by the first sub-machine;

determining one of the one or more first terminal devices as a second terminal device;

determining a candidate subset set corresponding to the second terminal equipment according to at least one of the number of the first subset, the RSSI of the PRACH respectively sent by the one or more first subset, and the position and coverage of the one or more first subset; wherein the candidate subset set includes one of the first subset or includes a plurality of adjacent first subset; all the submachines in the candidate submachine set can receive the random access request sent by the second terminal equipment on the same PRACH;

When all terminal equipment in the cell successfully resides in the cell, the BBU determines a target terminal set according to candidate sub-machine sets respectively corresponding to all terminal equipment in the cell, wherein the target terminal set comprises a plurality of terminal equipment, the intersection of the candidate sub-machine sets of the plurality of terminal equipment is an empty set, and the plurality of terminal equipment in the target terminal set can adopt the same wireless spectrum resource to carry out service in the same transmission time interval.

In some embodiments, the determining one of the one or more first terminal devices as the second terminal device includes:

randomly determining one of the one or more first terminal devices as the second terminal device in the case that the number of the first sub-machines is one;

and under the condition that the number of the first sub-machines is a plurality of, determining one first terminal device as the second terminal device from the one or more first terminal devices according to the positions and the coverage areas of the plurality of first sub-machines.

In some embodiments, the determining the second terminal device according to the positions and coverage areas of the plurality of first sub-machines includes:

According to the positions and coverage areas of the plurality of first sub-machines, under the condition that the plurality of first sub-machines are adjacent, the first candidate sub-machine set is determined to comprise the plurality of first sub-machines, and one first terminal device is randomly determined to be the second terminal device from all first terminal devices; or,

according to the positions and coverage areas of the plurality of first sub-machines, determining that part of the first sub-machines in the plurality of first sub-machines belong to an adjacent sub-machine set, and determining one first terminal device as the second terminal device from first terminal devices which send random access requests to the first sub-machines in the adjacent sub-machine set under the condition that all other first sub-machines do not have adjacent sub-machines; or,

according to the positions and coverage areas of the plurality of first sub-machines, determining that the plurality of first sub-machines belong to a plurality of adjacent sub-machine sets, and that the corresponding areas of the plurality of adjacent sub-machine sets are not adjacent to each other, randomly selecting one adjacent sub-machine set, and determining one first terminal device as the second terminal device from first terminal devices which send random access requests to the first sub-machines of the randomly selected adjacent sub-machine set; or,

And according to the positions and coverage areas of the plurality of first sub-machines, under the condition that the plurality of first sub-machines are not adjacent to each other, randomly selecting one first sub-machine, and determining one first terminal device as the second terminal device from first terminal devices which send random access requests to the randomly selected first sub-machine.

In some embodiments, the determining the candidate subset set corresponding to the second terminal device according to at least one of the number of the first subset, the RSSI of the PRACH sent by the one or more first subset, and the location and coverage of the one or more first subset, includes:

under the condition that the number of the first sub-machines is one, determining that the candidate sub-machine set corresponding to the second terminal equipment comprises the first sub-machine; the first sub-machine is a target sub-machine accessed by the second terminal equipment;

and under the condition that the number of the first sub-machines is a plurality of, determining a candidate sub-machine set corresponding to the second terminal equipment according to the RSSIs of the PRACH respectively sent by the plurality of first sub-machines and the positions and the coverage areas of the plurality of first sub-machines.

In some embodiments, the determining the candidate subset set corresponding to the second terminal device according to the RSSI of the PRACH, the positions and the coverage areas of the plurality of first subset, which are respectively sent by the plurality of first subset, includes:

determining a first sub-machine with the strongest RSSI of the PRACH in the plurality of first sub-machines as a target sub-machine accessed by the second terminal equipment;

and eliminating the first sub-machines which are not adjacent to the target sub-machine in the plurality of first sub-machines according to the positions and the coverage areas of the plurality of first sub-machines, and obtaining a candidate sub-machine set corresponding to the second terminal equipment.

In some embodiments, the removing, according to the positions and coverage areas of the plurality of first sub-machines, a first sub-machine that is not adjacent to the target sub-machine from the plurality of first sub-machines, to obtain a candidate sub-machine set corresponding to the second terminal device includes:

determining a linear distance according to the position of the first sub-machine and the position of the target sub-machine aiming at any first sub-machine;

if the linear distance is larger than the sum of the coverage radius of the first sub-machine and the coverage radius of the target sub-machine, determining that the first sub-machine is not adjacent to the target sub-machine, and eliminating the first sub-machine;

If the linear distance is smaller than or equal to the sum of the coverage radius of the first sub-machine and the coverage radius of the target sub-machine, determining that the first sub-machine is adjacent to the target sub-machine, and reserving the first sub-machine;

and obtaining a candidate subset set of the second terminal equipment until all the first subset is traversed.

In some embodiments, before the determining the target terminal set according to the candidate subset sets respectively corresponding to all the terminal devices in the cell, the method further includes:

-transmitting a random access response (Random Access Response, RAR) to the second terminal device by the target child machine, such that the second terminal device accesses the target child machine based on the random access response.

In some embodiments, the method further comprises:

when a terminal device is newly added in the FWA network, determining a candidate subset set of the newly added terminal device;

and updating the target terminal set according to the candidate subset set of all terminal devices in the FWA network.

In a second aspect, the present application provides a terminal determining apparatus for multiple user multiple input multiple output, including: means for performing the method of any one of the first aspect and the first aspect.

In a third aspect, the present application provides an electronic device, comprising: a memory and a processor;

the memory is configured to store computer program instructions;

the processor is configured to execute the computer program instructions to cause the electronic device to implement the method of any of the first aspect and the first aspect.

In a fourth aspect, the present application provides a readable storage medium comprising: computer program instructions;

an electronic device runs the computer program instructions such that the electronic device implements the method according to any of the first aspect and the first aspect.

In a fifth aspect, the present application provides a computer program product for execution by an electronic device, such that the electronic device implements the method of any of the first aspect and the first aspect.

In a sixth aspect, the present application provides a chip comprising: interface circuit and logic circuit, the interface circuit is used for receiving the signal from other chips outside the chip and transmitting to the logic circuit, or send the signal from the logic circuit to other chips outside the chip, the logic circuit is used for realizing the method according to the first aspect and any one of the first aspects.

In a seventh aspect, the present application provides a fixed wireless access network, comprising: a distributed massive multi-user multiple-input multiple-output system and a plurality of terminal devices, wherein the distributed massive multi-user multiple-input multiple-output system corresponds to a cell, the distributed massive multi-user multiple-input multiple-output system comprises a BBU and a plurality of submachines, and the positions of the plurality of terminal devices in the coverage area of the cell are fixed; the BBU is for performing the method according to any one of the first aspect and the first aspect.

In an eighth aspect, the present application provides a distributed massive multi-user multiple-input multiple-output system, where the distributed massive multi-user multiple-input multiple-output system corresponds to a cell, and the distributed massive multi-user multiple-input multiple-output system includes a BBU and multiple sub-machines, and a location of a terminal device in a coverage area of the cell is fixed; the BBU is for performing the method according to any one of the first aspect and the first aspect.

The embodiment of the application provides a multi-user multi-input multi-output terminal judging method, electronic equipment and a system, wherein the method is used for determining candidate subset sets of all terminal equipment in a FWA network in a random access process, after all terminal equipment successfully resides in a cell, determining different terminal equipment capable of carrying out MU-MIMO among different subset according to the candidate subset sets of all the terminal equipment, so as to realize the purpose that different terminals among different subset can adopt the same wireless spectrum resource to carry out service in the same transmission time interval, realize the improvement of the system capacity of a single cell, and solve the opposite problems of large data volume service requirement and too few wireless spectrum resources faced by a base station of a distributed massive MU-MIMO networking system.

Drawings

Fig. 1 is a schematic diagram of splitting a wireless base station;

FIG. 2 is a schematic diagram of a prior art distributed massive MU-MIMO networking system;

fig. 3 is a schematic diagram of a fixed wireless access network according to an embodiment of the present application;

fig. 4 is a flowchart of a method for determining a terminal with multiple user multiple input multiple output according to an embodiment of the present application;

fig. 5 is a flowchart of a method for determining a terminal with multiple user multiple input multiple output according to another embodiment of the present application;

fig. 6 is a flowchart of a method for determining a terminal with multiple user multiple input multiple output according to another embodiment of the present application;

fig. 7 is a block diagram of a multi-user mimo terminal determining apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c alone may represent: a alone, b alone, c alone, a combination of a and b, a combination of a and c, b and c, or a combination of a, b and c, wherein a, b, c may be single or plural. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The terms "center," "longitudinal," "transverse," "upper," "lower," "left," "right," "front," "rear," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

The terms "connected," "connected," and "connected" are to be construed broadly, and may refer to, for example, electrical or signal connections in addition to physical connections, e.g., direct connections, i.e., physical connections, or indirect connections via at least one element therebetween, such as long as electrical circuit communication is achieved, and communications within two elements; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through a circuit. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

First, each entity in fig. 1 will be described in detail:

a base station in a distributed massive MU-MIMO system can be split into BBU and sub-machines by adopting an option6 mode in the existing protocol.

Wherein the BBU contains a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) entity, a radio link layer control protocol (Radio Link Control, RLC) entity, and a medium access control (Medium Access Control, MAC) entity in a protocol stack, which are mainly responsible for backhaul communication with the core network and communication with the physical layer on each of the submachines. There is one BBU in each cell in a distributed massive MU-MIMO system.

The sub-machine comprises a Physical Layer (PHY), a remote radio frequency unit (Remote Radio Unit, RRU) and an antenna. In the distributed massive MU-MIMO system, a plurality of sub-machines exist in each cell, and the plurality of sub-machines are connected with only one BBU of the cell.

Fig. 2 illustrates a schematic diagram of a prior art distributed massive MU-MIMO networking system. The distributed massive MU-MIMO system is used for networking, and a BBU110 and a plurality of sub-machines 120 are arranged to form a distributed massive MU-MIMO networking system, so that wide area continuous coverage can be realized, and the BBU110 and the plurality of sub-machines 120 can be connected to different network ports of the switch 130, thereby realizing connection. Wherein each of the sub-machines 120 comprises a plurality of antennas, each of the sub-machines 120 is an independent transmission reception point (Transmission Reception Point, TRP).

The distributed massive MU-MIMO networking system described in fig. 2 provides a cell in which a plurality of terminal apparatuses 140 are disposed and the positions of the plurality of terminal apparatuses 140 are kept constant, thereby forming a fixed wireless access (Fixed Wireless Access, FWA) network 100.

Wherein the terminal devices 140 deployed in the distributed massive MU-MIMO cell may be, but are not limited to, client devices (Customer Premises Equipment, CPE) or any other form of terminal devices. As shown in fig. 3, 3 CPEs are disposed in the coverage of different sub-machines in a cell, wherein 2 CPEs are disposed in the coverage of two sub-machines, respectively, and 1 CPE is disposed in the overlapping area of the coverage of two adjacent sub-machines. It should be understood that more terminal devices may be set in the distributed massive MU-MIMO cell, and the type of terminal device is not limited to CPE either.

Since the distributed massive MU-MIMO networking system provides a cell, the base station generally provides radio spectrum resources of a cell to the terminal equipment in the coverage area of the cell. For the fourth generation mobile communication technology (the 4th generation mobile communication technology,4G) wireless network, a maximum bandwidth that a cell can provide is 20MHz; for the fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G) wireless network, a cell supporting FR1 (i.e., frequency Range 1, corresponding to Frequency Range 410MHz-7125 MHz) can provide a maximum bandwidth of 100MHz, and a cell supporting FR2 (i.e., frequency Range 2, corresponding to Frequency Range 24250MHz-52600 MHz) can provide a maximum bandwidth of 400MHz. The maximum bandwidth of the 5G single cell is improved compared with that of the 4G single cell, but the large data traffic requirements of all terminal devices in the wide area continuous coverage area cannot be met. Therefore, the base station of the distributed massive MU-MIMO networking system faces the opposite problems of always facing large data traffic demands and too little wireless spectrum resources.

Based on the above, the present application proposes a method, an apparatus and a readable storage medium for determining a multi-user multiple-input multiple-output terminal device in the FWA network, where the method determines a candidate subset set of all terminal devices in the FWA network in a random access process, after all terminal devices successfully reside in a cell, determines different terminal devices capable of performing MU-MIMO among different subset according to the candidate subset set of all terminal devices, so as to achieve the purpose that different terminals among different subset can use the same radio spectrum resource to perform service in the same transmission time interval, achieve the purpose of improving the capacity of a single cell, and solve the opposite problem that a base station of a distributed massive MU-MIMO networking system always faces a large data traffic demand and too few radio spectrum resources.

Next, a method for determining a multi-user mimo terminal device provided in the present application will be described in detail through several embodiments.

Fig. 4 is a flowchart of a method for determining a terminal device with multiple user multiple input multiple output according to an embodiment of the present application. The method of this embodiment is applied to a BBU. Referring to fig. 4, the method of the present embodiment includes:

S401, receiving first information sent by one or more first sub-machines respectively; the first information comprises the RSSI of the PRACH detected by the first sub-machine.

In a conventional mobile communication system, a base station may broadcast a PRACH configuration for use by a terminal device, where the PRACH configuration includes PRACH resources and a Preamble (Preamble) that may be used, and the base station may broadcast multiple sets of available PRACH configurations. Then, the terminal equipment randomly selects one PRACH configuration from PRACH configurations broadcasted by the base station and sends a random access request to the base station. The physical layer of the base station receives the random access request on the PRACH, detects the Preamble carried on the PRACH to obtain the Preamble ID, determines the information such as RSSI, TA and the like of the PRACH, generates a physical layer detection result based on the information, and executes the follow-up operation of the random access flow according to the physical layer detection result.

Based on this, there are two contention-based random access scenarios:

In the case that multiple terminal devices simultaneously select the same PRACH configuration to initiate random access, but because the allocable wireless spectrum resources are limited, access opportunities provided by the base station are required to be contended among the multiple terminal devices, the terminal devices with successful contention use the wireless spectrum resources to perform service, and the terminal devices with failed contention can initiate random access again.

In another case, the plurality of terminal devices respectively select different PRACH configurations to initiate random access, and at this time, the plurality of terminal devices do not need to compete for access opportunities provided by the base station, which can be understood as no competitor for the terminal devices.

In conjunction with the illustration of fig. 3, in the FWA network, the BBU broadcasts, through all the sub-machines in the cell, a plurality of groups of PRACH configurations available to the terminal device in the distributed massive MU-MIMO cell. And then, the terminal equipment randomly selects one PRACH configuration from the broadcast PRACH configurations and sends a random access request to the sub-machine. The sub-machine receives a random access request sent by terminal equipment in a coverage area of the sub-machine on the PRACH, detects a Preamble carried on the PRACH to obtain a Preamble ID, determines information such as RSSI, time Advance (TA) and the like of the PRACH, generates a physical layer detection result based on the information, and then sends the physical layer detection result to the BBU, so that the BBU determines a terminal equipment set for MU-MIMO and continues to execute subsequent operations of a random access flow.

And the BBU receives the physical layer detection result sent by the sub-machine. The number of the sub-machines sending the physical layer detection result to the BBU may be one or more, where the one or more sub-machines are one or more sub-machines in the distributed massive MU-MIMO cell, and the one or more sub-machines are all sub-machines that detect the random access request at the same time. The physical layer detection result sent by each sub-machine detecting the random access request to the BBU comprises the RSSI of PRACH detected by the sub-machine.

The one or more first slaves in this step are a group of slaves that detect the random access request on the same PRACH and have the same preamble carried by the random access request, from the one or more slaves that detect the random access request at the same time. The BBU can determine a group of sub-machines which detect the random access request on the same PRACH and have the same Preamble carried by the random access request according to the PRACH and the Preamble ID in the physical layer detection result sent by the sub-machines, and can determine the number of the first sub-machines. The first information is carried in a physical layer detection result sent to the BBU by the first sub-machine.

For example, in the FWA network, there are the slaves 1 to 10, where the physical layers of the slaves 1 to 5 all detect the random access request at the same time, and the slaves 1 to 5 respectively send information to the BBU, where the BBU determines, according to the information sent by the slaves, that the slaves 1, 2 and 3 detect the same preamble on the same PRACH, then the slaves 1, 2 and 3 are the first slaves, and determines that the number of the first slaves is 3.

Wherein detecting the same preamble on the same PRACH can be divided into the following cases:

case 1: the number of the first sub-machines is one, and the unique first sub-machine detects the random access request sent by the unique first terminal equipment on the PRACH in the coverage area of the first sub-machine. Case 1 belongs to contention-based random access, and the PRACH configuration selected for use by the first terminal device is not used simultaneously by other terminal devices, and thus, the first terminal device in case 1 has no contention.

It should be noted that, in case 1, the first sub-machine detecting a random access request sent by a first terminal device does not mean that only one fixed-location terminal device exists in the coverage area of the first sub-machine.

Case 2: the number of the first sub-machines is one, the unique first sub-machine detects random access requests sent by a plurality of first terminal devices in the coverage range of the first sub-machine on the same PRACH, and the preambles carried by the random access requests sent by the plurality of first terminal devices are the same. Case 2 describes contention-based random access, where the PRACH configuration selected for use by the first terminal device is used simultaneously by other terminal devices, and thus the first terminal device in case 2 has a contention.

It should be noted that in case 2, there are multiple fixed-position terminal devices in the coverage area of the first sub-machine, where the multiple first terminal devices may include all terminal devices in the coverage area of the first sub-machine, or may include part of terminal devices in the coverage area of the first sub-machine.

Case 3: the number of the first sub-machines is multiple, and the multiple first sub-machines detect random access requests sent by the unique first terminal equipment on the PRACH. Case 3 describes contention-based random access, where the PRACH configuration selected for use by the first terminal device is not used simultaneously by other terminal devices, and thus the first terminal device in case 3 has no contention.

It should be noted that, if a terminal device is located in an overlapping area of coverage of multiple sub-machines, a random access request sent by the terminal device may be detected by multiple sub-machines, so in case 3, the first terminal device may be one terminal device in an overlapping area of coverage of multiple first sub-machines.

Case 4: the number of the first sub-machines is multiple, the random access requests sent by the first terminal devices on the same PRACH are detected by the first sub-machines, and the preambles carried by the random access requests sent by the first terminal devices are the same. The first sub-machines may be all non-adjacent, or all adjacent, or part non-adjacent. Case 4 describes contention-based random access, where the PRACH configuration selected for use by the first terminal device is used simultaneously by other terminal devices, and thus the first terminal device in case 4 has a contention.

S402, one of the one or more first terminal devices is determined to be a second terminal device.

The second terminal device selects one terminal device from the one or more first terminal devices by performing contention-based random access judgment for the BBU, and subsequent operations are used to determine a candidate subset set for the second terminal device.

The BBU can determine one from the first terminal devices to serve as the second terminal device by combining the number of the first sub-machines, the number of the first information received by the BBU, the position of the first sub-machines, the coverage radius and other information.

The description is made in connection with 4 cases described in S401:

if the BBU belongs to the case 1 described in S401, the BBU receives a first information sent by the unique first sub-machine, based on which the BBU can determine that only one first terminal device currently initiates random access, and then determine the unique first terminal device as a second terminal device.

If the BBU belongs to the scenario 2 described in S401, the BBU may receive the plurality of first information sent by the unique first sub-machine, based on this, the BBU may determine that the current plurality of first terminal devices initiate random access through the unique first sub-machine, and then the BBU may randomly select one first terminal device that initiates random access as the second terminal device, or may also select one first terminal device as the second terminal device through any other manner.

If the bbu belongs to the case 3 and the case 4 described in S401, the bbu needs to determine, in combination with the positions and coverage radii of the plurality of first sub-machines, whether the random access requests received by the plurality of first sub-machines are from the same first terminal device, and then select one first terminal device as the second terminal device, and detailed implementation will be described later.

S403, determining a candidate subset set corresponding to the second terminal equipment according to at least one of the number of the first subset, RSSI of the PRACH respectively sent by one or more first subset, and the position and coverage of one or more first subset; wherein the candidate sub-machine set comprises a first sub-machine or a plurality of adjacent first sub-machines; all the submachines in the candidate submachine set can receive a random access request sent by the second terminal equipment on the PRACH.

The manner of determining the number of first sub-machines is identical to the manner described in the foregoing, and is not described here again for brevity.

The location of the first sub-machine may be sent by the sub-machine to the BBU. Each of the sub-machines is provided with a positioning module, which may be, but is not limited to, a global positioning system (Global Positioning System, GPS) module, which determines the location of the sub-machine (including latitude and longitude information) and sends the location of the sub-machine to the BBU. The sub-machine can send the position of the sub-machine to the BBU in the networking process or when the networking is successful, or the sub-machine can send the position of the sub-machine to the BBU periodically or at a specific moment.

The coverage radius of the first sub-machine may be stored in the BBU when the FWA network networking is successful.

The candidate subset set of the terminal device refers to a subset set capable of receiving the random access request sent by the terminal device at the same time. Since the uplink PRACH resources may be received by these sub-machines, in this application, it is considered that the uplink PUSCH transmission of the terminal device may also be received by these sub-machines, which also means that the uplink spectrum resources required for the terminal device to transmit the PUSCH cannot be multiplexed by other terminal devices within the coverage range of these sub-machines, i.e. MU-MIMO cannot be performed.

The BBU can judge the number of the first sub-machines, and under the condition that the number of the first sub-machines is one, the BBU determines the unique first sub-machine as the unique sub-machine contained in the candidate sub-machine set of the second terminal equipment; and under the condition that the number of the first sub-machines is a plurality of, the BBU determines which first sub-machines receive the random access request sent by the second terminal equipment according to the RSSI of the PRACH respectively sent by each first sub-machine and the position and coverage area of each first sub-machine, and determines the first sub-machines which receive the random access request sent by the second terminal equipment as sub-machines in the candidate sub-machine set of the second terminal equipment.

S404, when all terminal equipment in a cell successfully resides in the cell, determining a target terminal set according to candidate sub-machine sets respectively corresponding to all terminal equipment in the cell, wherein the target terminal set comprises a plurality of terminal equipment, the intersection of the candidate sub-machine sets of the plurality of terminal equipment is an empty set, and the plurality of terminal equipment in the target terminal set can adopt the same wireless spectrum resource to carry out service in the same transmission time interval.

Wherein, the FWA network includes N terminal devices, the candidate subset set of the terminal device 1 is A1, the candidate subset set of the terminal device 2 is A2, …, and so on, the candidate subset set of the terminal device N is a _N 。

Based on candidate subset sets A1 to A _N Calculation is performed, if A _k ∩A _k+1 ∩…∩A _k+r =Φ, where k, k+1, …, k+r e (1, 2, …, N),. U represents intersection, Φ represents empty set, then BBU considers a _k 、A _k+1 、…、A _k+r The terminal devices corresponding to the terminal devices are terminal devices in the target terminal device set, and the terminal devices can adopt the same wireless spectrum resource to carry out service in the same transmission time interval, namely, carry out MU-MIMO.

According to the method, the candidate subset set of each terminal device in the FWA network is determined in the random access stage, after all terminal devices in the FWA network reside in cells successfully, different terminal devices capable of carrying out MU-MIMO among different subset are determined according to the candidate subset set of all terminal devices, so that the purpose that different terminals among different subset can adopt the same wireless spectrum resources to carry out service in the same transmission time interval is achieved, the capacity of a single cell system is improved, the problem that base stations of a distributed massive MU-MIMO networking system face the opposition problem that large data volume service demands and too few wireless spectrum resources are always faced is solved.

Wherein, under the condition of not carrying out MU-MIMO, the transmission rate of the cell is T _singlecell ，T _singlecell Representing the uplink peak rate or the downlink peak rate of a single cell; by the method of the embodiment of the application, the set of the MU-MIMO service terminal equipment can be determined in the distributed massive MU-MIMO cell, so that the transmission rate of the cell can be maximally improved to N x T _singlecell Compared with the prior art, the method can improve the utilization rate of the limited wireless spectrum resources, so that the FWA network can better meet the large data traffic demands of a large number of terminal devices in a cell, and is also beneficial to alleviating congestion caused by insufficient wireless spectrum resources and improving user experience. N is the total number of sub-machines in a distributed massive MU-MIMO networking system.

Fig. 5 is a flowchart of a method for determining a terminal device with multiple user multiple input multiple output according to an embodiment of the present application. In connection with the embodiment S402 shown in fig. 4, the embodiment shown in fig. 5 mainly describes in detail how the second terminal device is determined in the case of a plurality of first sub-machines. Referring to fig. 5, the method of the present embodiment includes:

s501, determining adjacent conditions among the plurality of first sub-machines according to the positions and coverage areas of the plurality of first sub-machines.

The BBU can determine the linear distance between any two first sub-machines according to the positions (longitude and latitude) of the two first sub-machines, and determine whether the two first sub-machines are adjacent or not by combining the coverage radius of the first two first sub-machines. If the linear distance between the two first sub-machines is larger than the sum of the covering radiuses of the two first sub-machines, the two first sub-machines are not adjacent; and if the linear distance between the two first sub-machines is smaller than or equal to the sum of the coverage radiuses of the two first sub-machines, the two first sub-machines are adjacent.

In this way, the adjacency between all the first slaves can be determined.

Further, the adjacent cases among all the first child machines can be divided into four cases corresponding to S502 to S505 as follows.

S502, randomly determining one first terminal device as a second terminal device from all first terminal devices under the condition that a plurality of first sub-machines are adjacent.

The plurality of first sub-machines are adjacent to each other, which means that the plurality of first sub-machines have contact in a certain geographical area, or that the plurality of sub-machines realize continuous coverage in a certain geographical area.

In the case that the multiple first sub-machines are adjacent, the multiple first sub-machines may receive the random access request sent by the same first terminal device, which corresponds to the aforementioned case 3, and since the case 3 defines a scenario without a competitor, the unique first terminal device will eventually successfully access one first sub-machine, and the BBU determines the unique first terminal device as the second terminal device.

For example, the terminal device 1 is located in an overlapping area of coverage of the slave device 1, the slave device 2 and the slave device 3, and then the random access request sent by the terminal device 1 is detected by the slave device 1, the slave device 2 and the slave device 3 simultaneously, and since no competitor exists, the terminal device 1 is successfully accessed, and thus the BBU determines that the terminal device 1 is the second terminal device.

In the case where the plurality of first sub-machines are all adjacent, the plurality of first sub-machines may receive the random access request sent by the plurality of first terminal devices, which corresponds to one of the aforementioned scenarios of scenario 4, and then one of the plurality of first terminal devices has a successful contention for the first terminal device, and the BBU determines the first terminal device with the successful contention as the second terminal device.

For example, if the terminal device 1 is located in an overlapping area of coverage of the handset 1, the handset 2 and the handset 3, and the terminal device 2 is located in a non-overlapping area of coverage of the handset 1, then the terminal device 1 and the terminal device 2 initiate contention-based random access using the same PRACH configuration, but one of them will compete successfully, for example, the terminal device 1 will compete successfully, and the terminal device 2 will compete successfully, and the BBU determines that the terminal device 1 is the second terminal device. The terminal device 2 re-initiates the random access.

S503, determining one first terminal device as a second terminal device from the first terminal devices sending random access requests to the first sub-machines in the adjacent sub-machine set under the condition that part of the first sub-machines in the plurality of first sub-machines adjacently belong to an adjacent sub-machine set and the rest of the first sub-machines are not adjacent sub-machines.

The multiple adjacent first sub-machines belong to an adjacent sub-machine set, a single first sub-machine without an adjacent sub-machine and all first sub-machines in the adjacent sub-machine set simultaneously receive the same Preamble on the same PRACH, the scenario corresponds to one of the scenarios 4 mentioned above, and in the scenario, the BBU considers that the terminal equipment under the single first sub-machine without an adjacent sub-machine fails to compete, and the remaining mode of selecting one of the first terminal equipment under the adjacent sub-machine set as the second terminal equipment is the same as the implementation mode of S502, which is not repeated herein for brevity.

For example, the child machine 1, the child machine 2 and the child machine 3 are adjacent, the child machine 4 is not adjacent to the child machine 1, the child machine 2 and the child machine 3, the terminal device 1 is located in an overlapping area of coverage of the child machine 1, the child machine 2 and the child machine 3, the terminal device 2 is located in a non-overlapping area of coverage of the child machine 1, and the terminal device 3 is located in coverage of the child machine 4, then the terminal device 1, the terminal device 2 and the terminal device 3 initiate random access based on contention using the same PRACH configuration, then the terminal device 3 under the child machine 4 is considered to be failed to compete, one of the terminal device 1 and the terminal device 2 is successful to compete, for example, the terminal device 1 is successful to compete, and the terminal device 2 is failed to compete, then the BBU determines the terminal device 1 to be a second terminal device. The terminal device 2 and the terminal device 3 re-initiate the random access.

S504, a plurality of first sub-machines belong to a plurality of adjacent sub-machine sets, and the corresponding areas of the adjacent sub-machine sets are not adjacent to each other, one adjacent sub-machine set is randomly selected, and one first terminal device is determined to be a second terminal device from first terminal devices which send random access requests to the first sub-machines of the adjacent sub-machine set which are randomly selected.

The BBU randomly selects one adjacent sub-machine set, and selects one from the first terminal devices in the randomly selected adjacent sub-machine set as a second terminal device. In this scenario, the BBU considers the first terminal device under the unselected neighbor subset to be in contention failure. Moreover, the implementation manner of selecting the second terminal device from the first terminal devices in the randomly selected adjacent subset set is similar to the implementation manner of S502, and is not described herein for brevity.

For example, the subset 1, the subset 2 and the subset 3 are adjacently formed into an adjacent subset 1, the subset 4 is adjacently formed into an adjacent subset 2 with the subset 5 and the subset 6, the areas of the two adjacent subsets are not adjacent, the terminal set 1 is located in the overlapping area of the coverage of the subset 1, the subset 2 and the subset 3, the terminal set 2 is located in the non-overlapping area of the coverage of the subset 1, the terminal set 3 is located in the overlapping area of the coverage of the subset 4, the terminal set 5 and the subset 6, the terminal set 4 is located in the non-overlapping area of the coverage of the subset 4, then the terminal set 1, the terminal set 2, the terminal set 3 and the terminal set 4 initiate random access based on contention by using the same PRACH configuration, the BBU randomly selects the adjacent subset 1, the BBU considers that the terminal set 3 and the terminal set 4 under the adjacent subset 2 fail to compete, for example, the terminal set 1 and the terminal set 2 fail to compete successfully, and the terminal set 2 fails to compete, and the terminal set 1 determines the terminal set 1 as the second terminal set 1. Terminal device 2, terminal device 3 and terminal device 4 re-initiate random access.

S505, under the condition that the plurality of first sub-machines are not adjacent to each other, randomly selecting one first sub-machine, and determining one first terminal device as a second terminal device from first terminal devices which send random access requests to the randomly selected first sub-machines.

The BBU randomly selects a first sub-machine and selects one from the first terminal devices under the randomly selected first sub-machine as a second terminal device. In this scenario, the BBU considers the first terminal device under the unselected first child machine to fail in contention. Moreover, the implementation manner of selecting the second terminal device from the first terminal devices under the randomly selected first sub-machine is similar to the implementation manner of S502, and is not repeated here for brevity.

For example, the sub-set 1, the sub-set 2 and the sub-set 3 are not adjacent to each other, the terminal device 1 and the terminal device 2 are located in the coverage of the sub-set 1, the terminal device 3 is located in the coverage of the sub-set 2, and the terminal device 4 is located in the coverage of the sub-set 3, then the terminal device 1, the terminal device 2, the terminal device 3 and the terminal device 4 initiate contention-based random access using the same PRACH configuration, the BBU randomly selects the sub-set 1, and the BBU considers that the terminal device 3 under the sub-set 2 and the terminal device 4 under the sub-set 3 fail to compete, based on which, one of the terminal device 1 and the terminal device 2 may compete successfully, for example, the terminal device 1 competes successfully, and the terminal device 2 fails to compete, and the BBU determines that the terminal device 1 is the second terminal device. Terminal device 2, terminal device 3 and terminal device 4 re-initiate random access.

In the method of the embodiment, in the contention-based random access scenario, the adjacent condition of the first sub-machine is analyzed, and the contention-based random access judgment is performed in a proper mode, so that the second terminal equipment is determined, a reference object is determined for the subsequent flow Cheng Xuan, and the subsequent operation is ensured to be performed correctly.

Next, how to determine the candidate subset set for the second terminal device will be described in main detail.

And if the number of the first sub-machines is one, determining the unique first sub-machine as the unique sub-machine contained in the candidate sub-machine set of the second terminal equipment, wherein the unique first sub-machine is a target sub-machine accessed by the second terminal equipment, and the BBU sends a random access response to the second terminal equipment through the target sub-machine so that the second terminal equipment accesses the target sub-machine according to the random access response.

In the case that the number of the first sub-machines is plural, the candidate sub-machine set of the second terminal device may be determined by using the method shown in fig. 6. Fig. 6 is a flowchart of a method for determining a terminal with multiple user multiple input multiple output according to another embodiment of the present application. Referring to fig. 6, the method of the present embodiment includes:

s601, determining whether the number of the first sub-machines is one. If yes, executing S602; if not, S603 to S604 are performed.

S602, determining the unique first sub-machine as the unique sub-machine contained in the candidate sub-machine set of the second terminal equipment, wherein the unique first sub-machine is the target sub-machine accessed by the second terminal equipment.

S603, determining a first sub-machine with the strongest RSSI of PRACH in the plurality of first sub-machines as a target sub-machine accessed by the second terminal equipment.

In the distributed massive MU-MIMO system, because of continuous coverage, coverage areas of all the sub-machines have overlapping areas, when one terminal device is deployed in the overlapping areas and initiates random access, a situation that a random access request is detected by a plurality of sub-machines occurs, wherein a first sub-machine with the strongest RSSI of the PRACH means that the terminal device can obtain better uplink and downlink channel instructions than other first sub-machines in the coverage area of the first sub-machine, and therefore, the BBU selects the first sub-machine with the strongest RSSI of the PRACH as a target sub-machine to which a second terminal device is accessed.

S604, eliminating first sub-machines which are not adjacent to the target sub-machine in the plurality of first sub-machines according to the positions and the coverage areas of the plurality of first sub-machines, and obtaining a candidate sub-machine set corresponding to the second terminal equipment.

In this step, the target child machine and the first child machines adjacent to the target child machine in the plurality of first child machines are determined as child machines in the candidate child machine set.

The BBU determines a linear distance between a first sub-machine and a target sub-machine according to the positions of the first sub-machine and the target sub-machine aiming at any first sub-machine in a plurality of first sub-machines, and if the linear distance is larger than the sum of the covering radiuses of the first sub-machine and the target sub-machine, the first sub-machine is not adjacent to the target sub-machine, and the first sub-machine is removed; if the linear distance is smaller than or equal to the sum of the coverage radii of the first sub-machine and the target sub-machine, the first sub-machine is indicated to be adjacent to the target sub-machine, and therefore the first sub-machine is reserved. Based on this, all the first sub-machines are traversed, thereby determining a set of candidate sub-machines of the second terminal device. One of the set of candidate children.

In some embodiments, the BBU adds the IDs of all the first child machines to a blank list, deletes the IDs of the non-adjacent first child machines from the list according to whether the first child machines are adjacent to the target child machine, until all the first child machines traverse the list once, and finally determines that the first child machine remaining in the list is a candidate child machine set of the second terminal device.

In the method of the embodiment, the BBU can determine the candidate subset set for the second terminal equipment, and provide basis for determining the target terminal set capable of MU-MIMO.

After determining the target child machine through S602 and S603, on the basis of the embodiment shown in fig. 6, the method may further include: s605, a Random Access Response (RAR) is sent to the target slave machine to the second terminal device, so that the second terminal device accesses the target slave machine based on the random access response.

With the update of the FWA network, a situation may occur in which a new terminal device is added. The BBU needs to determine a candidate subset set corresponding to the newly added terminal equipment according to the newly added terminal equipment; and then, the target terminal equipment set is redetermined according to the candidate subset sets respectively corresponding to all the terminal equipment in the FWA network.

The BBU may determine the candidate subset set corresponding to the newly added terminal device in the manner shown in fig. 5 and fig. 6, and the detailed process may refer to the detailed description of the embodiment shown in fig. 5 and fig. 6, which is not repeated herein for brevity.

It should be noted that in some cases, terminal devices at some locations in the FWA network may be detached after power-off, and then reinstalled at other locations and keep the location unchanged, so that after the terminal devices are powered on again, random access may be reinitiated, and the BBU may consider it as a fixed-location terminal device in the FWA network, and determine its corresponding candidate subset set in the random access process.

Fig. 7 is a schematic structural diagram of a multi-user mimo terminal determining apparatus according to an embodiment of the present application. Referring to fig. 7, the terminal determining apparatus 700 for multiple user multiple input multiple output provided in this embodiment may exist independently, or may be integrated in other devices, and may be capable of implementing intercommunication with the aforementioned multiple sub-machines, so as to implement the operations corresponding to the BBU in any of the foregoing method embodiments.

The multi-user mimo terminal determining apparatus 700 may include: a transceiver module 701 and a processing module 702. The processing module 702 is configured to perform data processing, and the transceiver module 701 may implement a corresponding communication function. Transceiver module 701 may also be referred to as a communication interface or communication unit.

Optionally, the multi-user mimo terminal apparatus 700 may further include a storage unit, where the storage unit may be configured to store instructions and/or data, and the processing module 702 may read the instructions and/or data in the storage unit, so that the multi-user mimo terminal apparatus 700 implements the operations performed by the BBU in the foregoing method embodiments.

The transceiver module 701 is configured to perform operations related to receiving the BBU in the foregoing method embodiment, and the processing module 702 is configured to perform operations related to processing the BBU in the foregoing method embodiment.

Alternatively, the transceiver module 701 may include a transmitting module and a receiving module. The sending module is configured to perform the sending operation in the method embodiment. The receiving module is configured to perform the receiving operation in the above method embodiment.

It should be noted that, the terminal determining apparatus 700 of the multi-user mimo may include a transmitting module, and not include a receiving module. Alternatively, the multi-user mimo terminal apparatus 700 may include a receiving module instead of the transmitting module. Specifically, the terminal determining apparatus 700 may determine whether the scheme includes a transmission operation and a reception operation according to the above scheme.

As an example, the multi-user mimo terminal determining apparatus 700 is configured to perform the actions performed by the BBU in the embodiment shown in fig. 4.

The multi-user mimo terminal determining apparatus 700 may include: a transceiver module 701 and a processing module 702.

A transceiver module 701, configured to receive first information sent by one or more first sub-machines respectively; the one or more first sub-machines comprise all sub-machines which receive random access requests sent by one or more first terminal equipment respectively on the same PRACH in the fixed wireless access network, the preambles carried by the random access requests sent by the one or more first terminal equipment respectively are the same, and the first information comprises RSSI (received signal strength indicator) of the PRACH detected by the first sub-machine.

A processing module 702, configured to determine one of the one or more first terminal devices as a second terminal device; determining a candidate subset set corresponding to the second terminal equipment according to at least one of the number of the first subset, the RSSI of the PRACH respectively sent by the one or more first subset, and the position and coverage of the one or more first subset; wherein the candidate subset set includes one of the first subset or includes a plurality of adjacent first subset; all the submachines in the candidate submachine set can receive the random access request sent by the second terminal equipment on the same PRACH; when all terminal equipment in the cell successfully resides in the cell, the BBU determines a target terminal set according to candidate sub-machine sets respectively corresponding to all terminal equipment in the cell, wherein the target terminal set comprises a plurality of terminal equipment, the intersection of the candidate sub-machine sets of the plurality of terminal equipment is an empty set, and the plurality of terminal equipment in the target terminal set can adopt the same wireless spectrum resource to carry out service in the same transmission time interval.

It should be understood that, the foregoing corresponding process performed by each module is already described in the foregoing method embodiments, and is not described herein for brevity.

The processing module 702 in the previous embodiments may be implemented by at least one processor or processor-related circuitry. Transceiver module 701 may be implemented by a transceiver or transceiver related circuitry. Transceiver module 701 may also be referred to as a communication unit or communication interface. The memory unit may be implemented by at least one memory.

Fig. 8 is a block diagram of an electronic device according to an embodiment of the present application. Referring to fig. 8, an electronic device 800 provided in this embodiment includes: a memory 801 and a processor 802.

Where the memory 801 may be a separate physical unit, it may be connected to the processor 802 by a bus 803. The memory 801, the processor 802 may be integrated, realized by hardware, or the like. The memory 801 is used for storing program instructions that the processor 802 invokes to perform the operations performed by the BBU in any of the method embodiments above.

Alternatively, when some or all of the methods of the above embodiments are implemented in software, the electronic device 800 may include only the processor 802. The memory 801 for storing programs is located outside the electronic device 800, and the processor 802 is connected to the memory through a circuit/wire for reading and executing the programs stored in the memory. The processor 802 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The processor 802 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), general-purpose array logic (generic array logic, GAL), or any combination thereof.

The memory 801 may include volatile memory (RAM), such as random-access memory (RAM); the memory may also include a nonvolatile memory (non-volatile memory), such as a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); the memory may also comprise a combination of the above types of memories.

Illustratively, the present application provides a chip comprising: the BBU comprises an interface circuit and a logic circuit, wherein the interface circuit is used for receiving signals from other chips outside the chip and transmitting the signals to the logic circuit, or transmitting the signals from the logic circuit to the other chips outside the chip, and the logic circuit is used for executing the operations executed by the BBU in any method embodiment.

Illustratively, the present application provides a readable storage medium having stored thereon computer program instructions that are executed by a processor of an electronic device to cause the electronic device to perform the operations performed by the BBU in any of the above method embodiments.

Illustratively, the present application provides a computer program product which, when run on an electronic device, causes the electronic device to perform the operations performed by the BBU in any of the above method embodiments.

Exemplary, the present application provides a distributed multi-user multiple-input multiple-output system, where the distributed massive multi-user multiple-input multiple-output system corresponds to a cell, and the distributed massive multi-user multiple-input multiple-output system includes a BBU and multiple sub-machines, and a location of the terminal device in a coverage area of the cell is fixed; the BBU is used for executing the method of any one of the previous embodiments.

The application provides a fixed wireless access network comprising: a distributed massive multi-user multiple-input multiple-output system and a plurality of terminal devices, wherein the distributed massive multi-user multiple-input multiple-output system corresponds to a cell, the distributed massive multi-user multiple-input multiple-output system comprises a BBU and a plurality of submachines, and the positions of the plurality of terminal devices in the coverage area of the cell are fixed; the BBU is used for executing the method of any one of the previous embodiments.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The multi-user multiple-input multiple-output terminal judging method is characterized by being applied to a fixed wireless access network, wherein the fixed wireless access network comprises the following steps: the system comprises a distributed large number of multi-user multiple-input multiple-output systems and a plurality of terminal devices, wherein the distributed large number of multi-user multiple-input multiple-output systems correspond to a cell, the distributed large number of multi-user multiple-input multiple-output systems comprise a baseband processing unit BBU and a plurality of sub-machines, and the positions of the plurality of terminal devices in the coverage range of the cell are fixed; the method is applied to the BBU, and the method comprises the following steps:

Receiving first information sent by one or more first sub-machines respectively; the one or more first sub-machines comprise all sub-machines which receive random access requests sent by one or more first terminal equipment respectively on the same physical random access channel in the fixed wireless access network, the preambles carried by the random access requests sent by the one or more first terminal equipment respectively are the same, and the first information comprises a received signal strength indication RSSI of the PRACH detected by the first sub-machine;

2. The method of claim 1, wherein the determining one of the one or more first terminal devices as a second terminal device comprises:

3. The method of claim 2, wherein the determining the second terminal device according to the locations and coverage areas of the plurality of first sub-machines comprises:

4. The method of claim 1, wherein the determining the candidate subset set corresponding to the second terminal device according to at least one of the number of first subset, RSSI of the PRACH respectively sent by the one or more first subset, location and coverage of the one or more first subset, comprises:

5. The method of claim 4, wherein the determining the candidate subset set corresponding to the second terminal device according to the RSSI of the PRACH, the positions and the coverage areas of the plurality of first subset, which are respectively sent by the plurality of first subset, comprises:

6. The method of claim 5, wherein the removing, according to the positions and coverage areas of the plurality of first sub-machines, a first sub-machine that is not adjacent to the target sub-machine from the plurality of first sub-machines to obtain the candidate sub-machine set corresponding to the second terminal device includes:

7. The method according to claim 4 or 5, wherein before determining the target terminal set according to the candidate subset sets respectively corresponding to all terminal devices in the cell, the method further comprises:

and sending a random access response to the second terminal equipment through the target sub-machine, so that the second terminal equipment accesses the target sub-machine based on the random access response.

8. The method according to claim 1, wherein the method further comprises:

when a terminal device is newly added in the fixed wireless access network, determining a candidate subset set of the newly added terminal device;

and updating the target terminal set according to the candidate subset set of all terminal devices in the fixed wireless access network.

9. An electronic device, comprising: a memory and a processor;

The memory is configured to store computer program instructions;

the processor is configured to execute the computer program instructions to cause the electronic device to implement the multi-user multiple-input multiple-output terminal determination method according to any one of claims 1 to 8.

10. A distributed massive multi-user multiple-input multiple-output system, which is characterized in that the distributed massive multi-user multiple-input multiple-output system corresponds to a cell, and comprises a baseband processing unit BBU and a plurality of sub-machines, wherein the position of terminal equipment in the coverage area of the cell is fixed; the BBU is configured to perform the multi-user multiple-input multiple-output terminal determination method according to any one of claims 1 to 8.