CN113301502A - Wireless communication system and method based on multi-base station cooperation - Google Patents
Wireless communication system and method based on multi-base station cooperation Download PDFInfo
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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Abstract
The invention provides a wireless communication system and a method based on multi-base station cooperation, wherein the method comprises the following steps: the first distributed base station detects the data transmission state of the first distributed base station, and when the data transmission fault of the first distributed base station is detected, an emergency processing request is generated and sent to a second distributed base station in the neighborhood range of the first distributed base station; when the second distributed base station receives the emergency processing request, comparing and screening the first access user terminal list carried in the emergency processing request with a second access user terminal list acquired by the second distributed base station, screening out user terminals which repeatedly appear in the two access user terminal lists as cooperative user terminals, and sending a cooperative instruction to the cooperative user terminals; and the cooperative user terminal establishes communication connection with the abnormal user terminal affected by the transmission fault of the first distributed base station in the communication range of the cooperative user terminal according to the received cooperative instruction, and assists the abnormal user terminal to complete a data transmission task. The invention is beneficial to improving the reliability of wireless communication data transmission.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a wireless communication system and a wireless communication method based on multi-base-station cooperation.
Background
In a typical communication system, the coverage area of the network is divided into individual cells, each of which is typically served by a base station. This base station is called the serving base station of the cell. Each base station will provide data transmission services to the user terminals/user equipments within its cell.
In a conventional wireless communication network, a relatively independent working mode is maintained among base stations, that is, each base station is only responsible for performing uplink and downlink scheduling on user terminals/user equipment in a cell, and providing uplink and downlink data transmission services. One base station generally does not provide data transmission service for user terminals/user equipment of other cells, and one base station generally does not perform information interaction and data transmission operation with other base stations.
However, when a data transmission failure occurs in the base station, the user terminal/user equipment in the cell corresponding to the base station cannot perform data transmission through the base station, which affects the normal data transmission requirements of the user terminal/user equipment. Therefore, how to realize that when the base station has a data transmission failure and cannot perform data transmission with the user terminal/user equipment, the normal service of data transmission of the user terminal/user equipment can be ensured becomes a problem which needs to be solved urgently.
Disclosure of Invention
In view of the above problems, the present invention is directed to a wireless communication system and method based on multi-base station cooperation.
The purpose of the invention is realized by adopting the following technical scheme:
one aspect of the present invention is directed to a wireless communication system based on multi-base station cooperation, including a plurality of distributed base stations;
the distributed base stations are distributed in a target area, the service ranges of adjacent distributed base stations have an overlapping part, and the distributed base stations are used for completing data transmission service of user terminals in the service ranges;
the distributed base station comprises a communication module, a management module, a detection module, an emergency processing module and a cooperation processing module; wherein the content of the first and second substances,
the communication module is used for establishing a non-communication connection with the user terminal in the service range to realize data transmission between the distributed base station and the user terminal;
the management module is used for counting the user terminals accessed to the distributed base station and acquiring an access user terminal list;
the detection module is used for detecting the data transmission state of the distributed base station and sending the detection result of the data transmission state to the emergency processing module;
the emergency processing module is used for generating an emergency processing request and sending the emergency processing request to a neighborhood distributed base station in a neighborhood range when the distributed base station has a data transmission fault, wherein the emergency processing request carries an access user terminal list;
the cooperation processing module is used for comparing and screening an access user terminal list carried in the emergency processing request and an access user terminal list of the cooperation processing module according to the emergency processing request sent by the neighborhood distributed base station, screening out user terminals which repeatedly appear in the two access user terminal lists as cooperation user terminals, and sending cooperation instructions to the cooperation user terminals, so that the cooperation user terminals can establish communication connection with abnormal user terminals affected by the transmission faults of the distributed base station in a communication range of the cooperation user terminals according to the received cooperation instructions, and the abnormal user terminals are assisted to finish data transmission tasks.
In one embodiment, the management module includes:
and periodically counting the user terminals accessed to the distributed base station, and updating an access user terminal list.
In one embodiment, the detection module comprises:
and detecting the data transmission state of the distributed base station and the user terminal and/or the external switching center, and outputting a data transmission state detection result, wherein the data transmission state comprises an uplink data transmission state and a downlink data transmission state, and the data transmission state monitoring result comprises a normal transmission state or a fault transmission state.
In one embodiment, the emergency processing module includes a backup communication unit;
the standby communication unit is used for establishing communication connection with the neighborhood distributed base station when the distributed base station has data transmission faults, so that data interaction between the distributed base station and the neighborhood distributed base station is realized;
the emergency processing module further comprises: and when the distributed base station has data transmission failure, the emergency processing request is sent to the neighborhood distributed base station through the standby communication unit.
In one embodiment, the cooperation processing module comprises a screening and comparing unit and an instruction generating unit,
the screening and comparing unit is used for acquiring a first access user terminal list carried in the received emergency processing request, acquiring a second access user terminal list from the management module, comparing and screening according to the first access user terminal list and the second access user terminal list, and marking the user terminals screened out to be simultaneously present in the two access user terminal lists as cooperative user terminals; the emergency processing request is sent by a neighborhood distributed base station with data transmission failure, and the first access user terminal list is generated by the neighborhood distributed base station with data transmission failure;
the instruction generating unit is used for issuing a cooperation instruction to the cooperation user terminal through the communication module.
In one embodiment, a user terminal includes:
after a user terminal receives a cooperation instruction issued by a distributed base station, the user terminal is used as a cooperation user terminal to broadcast cooperation information to a neighborhood terminal in a communication range of the user terminal; after receiving the cooperation information, the neighborhood terminal judges whether the neighborhood terminal can not establish communication connection with the distributed base station, if the neighborhood terminal can not establish communication connection with the distributed base station at present, the neighborhood terminal establishes communication connection with the cooperation user terminal, the neighborhood terminal transmits data to the cooperation user terminal, and the cooperation user terminal transmits the data to the distributed base station in a unified mode.
In another aspect, the present invention provides a wireless communication method based on multi-base station cooperation, which is applied to a wireless communication system based on multi-base station cooperation as shown in any one of the embodiments of the first aspect; the method comprises the following steps:
the first distributed base station counts the user terminals accessed to the first distributed base station to obtain a first access user terminal list;
the first distributed base station detects the data transmission state of the first distributed base station, and when the data transmission fault of the first distributed base station is detected, an emergency processing request is generated and sent to a second distributed base station in the neighborhood range of the first distributed base station;
when the second distributed base station receives the emergency processing request, comparing and screening the first access user terminal list carried in the emergency processing request with a second access user terminal list acquired by the second distributed base station, screening out user terminals which repeatedly appear in the two access user terminal lists as cooperative user terminals, and sending a cooperative instruction to the cooperative user terminals;
and the cooperative user terminal establishes communication connection with the abnormal user terminal affected by the transmission fault of the first distributed base station in the communication range of the cooperative user terminal according to the received cooperative instruction, and assists the abnormal user terminal to complete a data transmission task.
The invention has the beneficial effects that: the invention is helpful to avoid the situation that the user terminal in the service range can not transmit data after the distributed base station has data transmission failure, and improves the reliability of the data transmission of the user terminal.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a block diagram of an exemplary embodiment of a wireless communication system based on multi-base station cooperation according to the present invention.
Fig. 2 is a schematic diagram of a communication connection relationship between a distributed base station and a user terminal in a normal data transmission state in the embodiment of fig. 1;
fig. 3 is a schematic diagram of a communication connection relationship between a distributed base station and a user terminal after a data transmission failure occurs in the embodiment of fig. 1.
Detailed Description
The invention is further described in connection with the following application scenarios.
Referring to fig. 1, a wireless communication system based on multi-base station cooperation is shown in an embodiment, which includes a plurality of distributed base stations;
the distributed base stations are distributed in a target area, the service ranges of adjacent distributed base stations have an overlapping part, and the distributed base stations are used for completing data transmission service of user terminals in the service ranges;
the distributed base station comprises a communication module, a management module, a detection module, an emergency processing module and a cooperation processing module; wherein the content of the first and second substances,
the communication module is used for establishing a non-communication connection with the user terminal in the service range to realize data transmission between the distributed base station and the user terminal;
the management module is used for counting the user terminals accessed to the distributed base station and acquiring an access user terminal list;
the detection module is used for detecting the data transmission state of the distributed base station and sending the detection result of the data transmission state to the emergency processing module;
the emergency processing module is used for generating an emergency processing request and sending the emergency processing request to a neighborhood distributed base station in a neighborhood range when the distributed base station has a data transmission fault, wherein the emergency processing request carries an access user terminal list;
the cooperation processing module is used for comparing and screening an access user terminal list carried in the emergency processing request and an access user terminal list of the cooperation processing module according to the emergency processing request sent by the neighborhood distributed base station, screening out user terminals which repeatedly appear in the two access user terminal lists as cooperation user terminals, and sending cooperation instructions to the cooperation user terminals, so that the cooperation user terminals can establish communication connection with abnormal user terminals affected by the transmission faults of the distributed base station in a communication range of the cooperation user terminals according to the received cooperation instructions, and the abnormal user terminals are assisted to finish data transmission tasks.
In the above embodiment, a wireless communication system based on cooperation of multiple distributed base stations is provided, where each distributed base station is provided with a communication module, so as to meet the normal data transmission requirement of a user terminal in a service range; the distributed base station is also particularly provided with a management module for periodically/real-time counting the user terminals currently accessed to the distributed base station, generating an access user terminal list and periodically/real-time updating the access user terminal list; the detection module can detect the data transmission state of the distributed base station in real time, when the distributed base station has data transmission failure, namely the distributed base station can not continuously complete the data transmission task of the user terminal in the service range (for example, the distributed base station can not be connected with the terminal of the distributed base station and the user terminal, or the distributed base station can not send downlink data, etc.), the cooperation processing module passed by the distributed base station sends an emergency processing request to the neighborhood distributed base station, after the neighborhood distributed base station receives the emergency processing request, the user terminal in the overlapped service range of the two distributed base stations is screened out as a cooperation terminal according to the access user terminal list, and a cooperation instruction is sent to the cooperation terminal, the cooperation terminal is used as a relay node of the user terminal in the service range of the failed distributed base station, and assists the user terminal in the service range of the failed distributed base station to pass through a multi-hop transmission mode, and finishing the data transmission task. The method and the device are favorable for avoiding the condition that the user terminal in the service range can not transmit data after the data transmission fault occurs in the distributed base station, and improve the reliability of the data transmission of the user terminal.
In one embodiment, the management module includes:
and periodically counting the user terminals accessed to the distributed base station, and updating an access user terminal list.
The management module can also be set to update in real time according to the requirement, and update the user terminal list currently accessed to the distributed base station in real time.
In one embodiment, the detection module comprises:
and detecting the data transmission state of the distributed base station and the user terminal and/or the external switching center, and outputting a data transmission state detection result, wherein the data transmission state comprises an uplink data transmission state and a downlink data transmission state, and the data transmission state monitoring result comprises a normal transmission state or a fault transmission state.
In one scenario, the detection module detects the uplink and downlink data transmission speed and data transmission amount of the distributed base station in real time, and judges whether a data transmission fault occurs in the distributed base station according to the uplink and downlink data transmission speed and data transmission amount.
In one embodiment, the emergency processing module includes a backup communication unit;
the standby communication unit is used for establishing communication connection with the neighborhood distributed base station when the distributed base station has data transmission faults, so that data interaction between the distributed base station and the neighborhood distributed base station is realized;
the emergency processing module further comprises: and when the distributed base station has data transmission failure, the emergency processing request is sent to the neighborhood distributed base station through the standby communication unit.
The emergency processing module is a functional module which operates when the distributed base station has a data transmission fault, and therefore in order to improve the reliability of the emergency processing module, an independent processor and a communication unit are arranged for the emergency processing module, so that the emergency processing module can still independently and normally operate when the distributed base station has a data transmission fault (including caused by software and hardware faults).
In one embodiment, the cooperation processing module comprises a screening and comparing unit and an instruction generating unit,
the screening and comparing unit is used for acquiring a first access user terminal list carried in the received emergency processing request, acquiring a second access user terminal list from the management module, comparing and screening according to the first access user terminal list and the second access user terminal list, and marking the user terminals screened out to be simultaneously present in the two access user terminal lists as cooperative user terminals; the emergency processing request is sent by a neighborhood distributed base station with data transmission failure, and the first access user terminal list is generated by the neighborhood distributed base station with data transmission failure;
the instruction generating unit is used for issuing a cooperation instruction to the cooperation user terminal through the communication module.
In one embodiment, the screening and comparing unit performs comparison and screening according to the first access user terminal list and the second access user terminal list, and screens out the user terminals that appear in the two access user terminal lists at the same time and marks them as cooperative user terminals, specifically including:
comparing and screening according to the first access user terminal list and the second access user terminal list, marking the user terminals screened out to be simultaneously present in the two access user terminal lists as screening user terminals, and forming a screening user terminal set;
screening a proper user terminal from the screening user terminal set to serve as a cooperative user terminal;
wherein, select suitable user terminal as the cooperative user terminal from filtering the user terminal set, further include:
and respectively acquiring the state information of the screening user terminals, calculating the assistance scores of the screening user terminals according to the state information of the screening user terminals, and screening the screening user terminals with the assistance scores larger than a set threshold value as cooperative user terminals.
In one embodiment, the assistance score of the user terminal is calculated and filtered, and a specifically-adopted assistance score calculation function is as follows:
in the formula, DnIndicating a assistance score of the nth screening user terminal, wherein N is 1,2, …, N, … N, N indicates a total number of screening user terminals in the set of screening user terminals; v. ofnRepresenting the moving speed of the screening user terminal; v. oftIndicating a set speed threshold, tnRepresenting the duration of continuous communication connection establishment between the screening user terminal and the current distributed base station; y isnRepresenting the data transmission delay between the screening user terminal and the distributed base station; y' represents a set delay standard value, and alpha, beta and gamma respectively represent set adjusting factors.
And reporting the moving speed of the screened user terminal to the distributed base station by the user terminal, wherein the moving speed is 0 for the user terminal which is fixedly arranged. The data transmission delay between the screening user terminal and the distributed base station transmits the time difference between the test information transmitted to the screening user terminal through the distributed base station and the response information fed back by the screening user terminal;
in the above embodiment, after the screening user terminal sets meeting the requirement are screened for the distributed base station, the stability of the screening user terminals can be further judged by calculating the assistance scores of the screening user terminals, wherein an assistance score calculation function is provided, which can comprehensively evaluate the stability of the screening user terminals subsequently used as relay nodes from three dimensions of the terminal moving speed (if the screening user terminals are only at the overlapping position of two base stations at the time when the screening user terminals are counted by the distributed base station and the terminal is likely to move out of the overlapping range subsequently and lose connection with the normally operated distributed base station, the stability of the terminal is considered not high), the continuous connection duration (if the terminal is frequently disconnected, the stability of the terminal is considered not high) and the data transmission speed (the data transmission quality needs to be ensured to be normal), therefore, a proper user terminal is accurately screened from the screening user terminal set to serve as a cooperative user terminal, and a foundation is laid for the follow-up cooperative user terminal serving as a relay node to assist other user terminals in the distributed base station with data transmission faults to complete data transmission tasks.
In one embodiment, a user terminal includes:
after a user terminal receives a cooperation instruction issued by a distributed base station, the user terminal is used as a cooperation user terminal to broadcast cooperation information to a neighborhood terminal in a communication range of the user terminal; after receiving the cooperation information, the neighborhood terminal judges whether the neighborhood terminal can not establish communication connection with the distributed base station, if the neighborhood terminal can not establish communication connection with the distributed base station at present, the neighborhood terminal establishes direct communication connection with the cooperation user terminal, and the neighborhood terminal transmits data to the cooperation user terminal and the cooperation user terminal transmits the data to the distributed base station in a unified mode.
In one scenario, when a neighborhood terminal receives cooperation information broadcast by a plurality of terminals for cooperation at the same time, one of the terminals for cooperation is randomly selected as a superior user terminal of the terminal for cooperation, and a direct communication connection is established between the terminal for cooperation and the terminal for cooperation; the method and the device can help to disperse the transmission pressure of the cooperative task terminal as the relay node and improve the overall performance of the system.
In one scenario, after the neighborhood terminal establishes communication connection with the cooperative user terminal to complete the data transmission task of the neighborhood terminal, the neighborhood terminal can further serve as a secondary cooperative user terminal to broadcast cooperative information to other neighborhood user terminals in the communication range of the neighborhood terminal, and further assist other user terminals which cannot establish communication connection with the distributed base station to complete data transmission service; and in the same way, the data transmission service can be finished by all the user terminals which cannot finish the data transmission service under the influence of the fault of the distributed base station through a multi-hop transmission mode among the user terminals.
In addition, based on the above proposed wireless communication system based on multi-base station cooperation, the present invention also shows a wireless communication method based on multi-base station cooperation, see fig. 2, which shows the communication connection relationship between the distributed base station and the user terminal in the normal data transmission state; in the figure, a first distributed base station represents a distributed base station where data transmission failure will occur, a second distributed base station represents a distributed base station in the neighborhood of the first distributed base station, and a dotted line represents the service range of the distributed base station; referring to fig. 3, it shows the communication connection relationship between the distributed base station and the user terminal after the data transmission failure occurs in the first distributed base station;
the specific wireless communication method comprises the following steps:
the first distributed base station counts the user terminals accessed to the first distributed base station to obtain a first access user terminal list;
the first distributed base station detects the data transmission state of the first distributed base station, and when the data transmission fault of the first distributed base station is detected, an emergency processing request is generated and sent to a second distributed base station in the neighborhood range of the first distributed base station;
when the second distributed base station receives the emergency processing request, comparing and screening the first access user terminal list carried in the emergency processing request with a second access user terminal list acquired by the second distributed base station, screening out user terminals which repeatedly appear in the two access user terminal lists as cooperative user terminals, and sending a cooperative instruction to the cooperative user terminals;
and the cooperative user terminal establishes communication connection with the abnormal user terminal affected by the transmission fault of the first distributed base station in the communication range of the cooperative user terminal according to the received cooperative instruction, and assists the abnormal user terminal to complete a data transmission task.
In one embodiment, the method further comprises:
the first distributed base station periodically counts the user terminals accessed to the distributed base station, and updates a first access user terminal list;
and the second distributed base station periodically counts the user terminals accessed to the distributed base station and updates the second access user terminal list.
In one embodiment, the method further comprises:
the first distributed base station detects the data transmission state of the distributed base station and the user terminal and/or the external switching center and outputs a data transmission state detection result, wherein the data transmission state comprises an uplink data transmission state and a downlink data transmission state, and the data transmission state monitoring result comprises a normal transmission state or a fault transmission state.
In one embodiment, the method further comprises:
when a data transmission fault occurs in the first distributed base station, the first distributed base station establishes communication connection with a second distributed base station in a neighborhood range through the standby communication unit, and the first distributed base station sends an emergency processing request to the second distributed base station in the neighborhood range through the standby communication unit. (ii) a
In one embodiment, the method further comprises:
the second distributed base station acquires a first access user terminal list carried in the received emergency processing request, acquires a second access user terminal list from a management module of the second distributed base station, performs comparison screening according to the first access user terminal list and the second access user terminal list, and marks user terminals screened out to be simultaneously present in the two access user terminal lists as cooperative user terminals;
and the second distributed base station issues a cooperation instruction to the cooperative user terminal through the communication module.
In one mode, the method of screening out the user terminals appearing in two access user terminal lists at the same time and marking the user terminals as cooperative user terminals specifically includes:
comparing and screening according to the first access user terminal list and the second access user terminal list, marking the user terminals screened out to be simultaneously present in the two access user terminal lists as screening user terminals, and forming a screening user terminal set;
screening a proper user terminal from the screening user terminal set to serve as a cooperative user terminal;
wherein, select suitable user terminal as the cooperative user terminal from filtering the user terminal set, further include:
and respectively acquiring the state information of the screening user terminals, calculating the assistance scores of the screening user terminals according to the state information of the screening user terminals, and screening the screening user terminals with the assistance scores larger than a set threshold value as cooperative user terminals.
In one embodiment, the assistance score of the user terminal is calculated and filtered, and a specifically-adopted assistance score calculation function is as follows:
in the formula, DnIndicating a assistance score of the nth screening user terminal, wherein N is 1,2, …, N, … N, N indicates a total number of screening user terminals in the set of screening user terminals; v. ofnRepresenting the moving speed of the screening user terminal; v. oftIndicating a set speed threshold, tnRepresenting the duration of continuous communication connection establishment between the screening user terminal and the current distributed base station; y isnRepresenting the data transmission delay between the screening user terminal and the distributed base station; y' represents a set delay standard value, and alpha, beta and gamma respectively represent set adjusting factors.
In one embodiment, the method further comprises:
when a cooperative user terminal receives a cooperative instruction issued by a distributed base station, the cooperative user terminal broadcasts cooperative information to a neighborhood terminal in a communication range of the cooperative user terminal; after receiving the cooperation information, the neighborhood terminal judges whether the neighborhood terminal can not establish communication connection with the distributed base station, if the neighborhood terminal can not establish communication connection with the distributed base station at present, the neighborhood terminal establishes direct communication connection with the cooperation user terminal, and the neighborhood terminal transmits data to the cooperation user terminal and transmits the data to the second distributed base station in a unified manner.
In addition, the above-described one wireless communication method based on multi-base station cooperation further includes a processing flow of an embodiment corresponding to the distributed base station and the user terminal in the above-described one wireless communication system based on multi-base station cooperation, and the description of the present application is not repeated here.
It should be noted that, functional units/modules in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules are integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of software functional units/modules.
From the above description of embodiments, it is clear for a person skilled in the art that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code or any appropriate combination thereof. For a hardware implementation, a processor may be implemented in one or more of the following units: an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, other electronic units designed to perform the functions described herein, or a combination thereof. For a software implementation, some or all of the procedures of an embodiment may be performed by a computer program instructing associated hardware. In practice, the program may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be analyzed by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A wireless communication system based on multi-base station cooperation is characterized by comprising a plurality of distributed base stations;
the distributed base stations are distributed in a target area, the service ranges of adjacent distributed base stations have an overlapping part, and the distributed base stations are used for completing data transmission service of user terminals in the service ranges;
the distributed base station comprises a communication module, a management module, a detection module, an emergency processing module and a cooperation processing module; wherein the content of the first and second substances,
the communication module is used for establishing a non-communication connection with the user terminal in the service range to realize data transmission between the distributed base station and the user terminal;
the management module is used for counting the user terminals accessed to the distributed base station and acquiring an access user terminal list;
the detection module is used for detecting the data transmission state of the distributed base station and sending the detection result of the data transmission state to the emergency processing module;
the emergency processing module is used for generating an emergency processing request and sending the emergency processing request to a neighborhood distributed base station in a neighborhood range when the distributed base station has a data transmission fault, wherein the emergency processing request carries an access user terminal list;
the cooperation processing module is used for comparing and screening an access user terminal list carried in the emergency processing request and an access user terminal list of the cooperation processing module according to the emergency processing request sent by the neighborhood distributed base station, screening out user terminals which repeatedly appear in the two access user terminal lists as cooperation user terminals, and sending cooperation instructions to the cooperation user terminals, so that the cooperation user terminals can establish communication connection with abnormal user terminals affected by the transmission faults of the distributed base station in a communication range of the cooperation user terminals according to the received cooperation instructions, and the abnormal user terminals are assisted to finish data transmission tasks.
2. The wireless communication system based on multi-base station cooperation of claim 1, wherein the management module comprises:
and periodically counting the user terminals accessed to the distributed base station, and updating an access user terminal list.
3. The system of claim 1, wherein the detection module comprises:
and detecting the data transmission state of the distributed base station and the user terminal and/or the external switching center, and outputting a data transmission state detection result, wherein the data transmission state comprises an uplink data transmission state and a downlink data transmission state, and the data transmission state monitoring result comprises a normal transmission state or a fault transmission state.
4. The system of claim 3, wherein the emergency processing module comprises a standby communication unit;
the standby communication unit is used for establishing communication connection with the neighborhood distributed base station when the distributed base station has data transmission faults, so that data interaction between the distributed base station and the neighborhood distributed base station is realized;
the emergency processing module further comprises: and when the distributed base station has data transmission failure, the emergency processing request is sent to the neighborhood distributed base station through the standby communication unit.
5. The system of claim 4, wherein the cooperation processing module comprises a screening and comparing unit and an instruction generating unit,
the screening and comparing unit is used for acquiring a first access user terminal list carried in the received emergency processing request, acquiring a second access user terminal list from the management module, comparing and screening according to the first access user terminal list and the second access user terminal list, and marking the user terminals screened out to be simultaneously present in the two access user terminal lists as cooperative user terminals; the emergency processing request is sent by a neighborhood distributed base station with data transmission failure, and the first access user terminal list is generated by the neighborhood distributed base station with data transmission failure;
the instruction generating unit is used for issuing a cooperation instruction to the cooperation user terminal through the communication module.
6. The wireless communication system based on multi-base station cooperation of claim 5, wherein the user terminal comprises:
after a user terminal receives a cooperation instruction issued by a distributed base station, the user terminal is used as a cooperation user terminal to broadcast cooperation information to a neighborhood terminal in a communication range of the user terminal; after receiving the cooperation information, the neighborhood terminal judges whether the neighborhood terminal can not establish communication connection with the distributed base station, if the neighborhood terminal can not establish communication connection with the distributed base station at present, the neighborhood terminal establishes communication connection with the cooperation user terminal, the neighborhood terminal transmits data to the cooperation user terminal, and the cooperation user terminal transmits the data to the distributed base station in a unified mode.
7. A wireless communication method based on multiple base station cooperation, which is applied in a wireless communication system based on multiple base station cooperation as claimed in any one of claims 1-6, the method comprising:
the first distributed base station counts the user terminals accessed to the first distributed base station to obtain a first access user terminal list;
the first distributed base station detects the data transmission state of the first distributed base station, and when the data transmission fault of the first distributed base station is detected, an emergency processing request is generated and sent to a second distributed base station in the neighborhood range of the first distributed base station;
when the second distributed base station receives the emergency processing request, comparing and screening the first access user terminal list carried in the emergency processing request with a second access user terminal list acquired by the second distributed base station, screening out user terminals which repeatedly appear in the two access user terminal lists as cooperative user terminals, and sending a cooperative instruction to the cooperative user terminals;
and the cooperative user terminal establishes communication connection with the abnormal user terminal affected by the transmission fault of the first distributed base station in the communication range of the cooperative user terminal according to the received cooperative instruction, and assists the abnormal user terminal to complete a data transmission task.
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