CN110661887B - Method and device for establishing communication link, communication system and server - Google Patents

Method and device for establishing communication link, communication system and server Download PDF

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Publication number
CN110661887B
CN110661887B CN201911048764.7A CN201911048764A CN110661887B CN 110661887 B CN110661887 B CN 110661887B CN 201911048764 A CN201911048764 A CN 201911048764A CN 110661887 B CN110661887 B CN 110661887B
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data transmission
server
central server
link
access request
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CN110661887A (en
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孙宝升
孙洁
运朝青
郑军
尹曙明
吴宏
范丹丹
罗又天
吕丽红
吴翔宇
李翔
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32039 Unit Of Chinese Pla
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/14Session management
    • H04L67/141Setup of application sessions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup

Abstract

The invention provides a method, a device, a communication system and a server for establishing a communication link, which relate to the technical field of data transmission of the link. The invention can reduce the communication cost, improve the establishment convenience of the communication link and reduce the debugging workload.

Description

Method and device for establishing communication link, communication system and server
Technical Field
The present invention relates to the technical field of data transmission of links, and in particular, to a method and an apparatus for establishing a communication link, a communication system, and a server.
Background
In the prior art, a corresponding server (hereinafter, may be referred to as a first central server) needs to be configured for each relay satellite, so that a user center (which may be implemented by using a second central server) is in communication connection with the first central server, and thus the cost is generally high. Specifically, if the user center needs the relay satellite to provide service, the user center needs to communicate with a first center server configured by the relay satellite, so that the first center server establishes a communication link for the user center and the relay satellite, and when the user center and the relay satellite are specifically implemented, the communication link is established between the user center and a data transmission server docked with the relay satellite. When the user center executes tasks of the same model and needs different relay satellites to provide services, the user center needs to communicate with first center servers configured by different relay satellites respectively, and the method is complex. Moreover, when a communication link is established, a system joint debugging test is required to be performed between different first central servers, and the workload is large.
Disclosure of Invention
The invention aims to provide a communication link establishing method, a communication link establishing device, a communication system and a server, which can reduce communication cost, improve communication link establishing convenience and reduce debugging workload.
In a first aspect, the present invention provides a method for establishing a communication link, where the method is applied to a first central server, and the first central server is in communication connection with a plurality of data transmission servers; the method comprises the following steps:
if a link access request sent by a second central server is received, determining a target data transmission server based on the link access request; the link access request carries identification information of the target data transmission server;
and establishing a communication link between the second central server and the target data transmission server.
Furthermore, each data transmission server is in communication connection with a relay satellite, and relay satellites corresponding to different data transmission servers are different; the link access request also carries a request identifier, task information and link information;
the step of establishing a communication link between the second central server and the target data transmission server includes:
sending the received link access request to the target data transmission server so that the target data transmission server judges the legality of the link access request based on the request identifier, and determining the data transmission time between the second center server and a relay satellite corresponding to the target data transmission server based on the task information when the link access request is legal;
and establishing a communication link between the second central server and the target data transmission server based on the data transmission time and the link information.
Further, the link access request is initiated to the first central server by the second central server within a preset time before the task execution time after the second central server receives the task execution time.
In a second aspect, the present invention provides a communication system, wherein the system includes a first central server, a second central server, and a plurality of data transmission servers in communication connection with the first central server;
the second central server is used for sending a link access request to the first central server;
the first central server is used for receiving the link access request, determining a target data transmission server based on the link access request, and establishing a communication link between the second central server and the target data transmission server; and the link access request carries identification information of the target data transmission server.
Furthermore, each data transmission server is in communication connection with a relay satellite, and relay satellites corresponding to different data transmission servers are different; the link access request also carries a request identifier, task information and link information;
the first central server is also used for sending the received link access request to the target data transmission server; the target data transmission server is used for judging the legality of the link access request based on the request identifier and determining the data transmission time between the second central server and the relay satellite corresponding to the target data transmission server based on the task information when the link access request is legal;
the first central server is further used for establishing a communication link between the second central server and the target data transmission server based on the data transmission time and the link information.
Further, the system further comprises a ground station;
and each data transmission server is in communication connection with the relay satellite through the ground station.
Further, the second central server is configured to initiate the link access request to the first central server within a preset time before the task execution time after receiving the task execution time.
In a third aspect, the present invention provides an apparatus for establishing a communication link, wherein the apparatus is applied to a first central server, and the first central server is in communication connection with a plurality of data transmission servers; the device comprises:
the target determining module is used for determining a target data transmission server based on a link access request sent by the second central server if the link access request is received; the link access request carries identification information of the target data transmission server;
and the link establishing module is used for establishing a communication link between the second central server and the target data transmission server.
In a fourth aspect, the present invention provides a server, comprising a processor and a memory, wherein the memory stores computer-executable instructions capable of being executed by the processor, and the processor executes the computer-executable instructions to implement the steps of the method for establishing a communication link according to the first aspect.
In a fifth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium has a computer program stored thereon, and wherein the computer program, when executed by a processor, performs the steps of the method for establishing a communication link according to the first aspect.
The embodiment of the invention has the following beneficial effects:
the invention provides a method, a device, a communication system and a server for establishing a communication link, wherein the method is applied to a first central server, the first central server is in communication connection with a plurality of data transmission servers, and the first central server can determine a target data transmission server based on a link access request (carrying identification information of the target data transmission server) when receiving the link access request sent by a second central server, so that the communication link between the second central server and the target data transmission server is established. The first central server in the embodiment of the invention can be in communication connection with a plurality of data transmission servers, and the link access request sent by the second central server to the first central server carries the identification information of the target data transmission server which needs to establish communication link connection, so that the first central server can directly establish the communication link between the second central server and the target data transmission server. In this way, the docking between the second central server and the target data transmission server in the plurality of data transmission servers can be realized by adopting one first central server, and compared with the prior art in which a plurality of first central servers are configured for each second central server, only one first central server can be adopted in the embodiment, so that the communication cost can be effectively saved; and when the second central server initiates a communication link request, the second central server only needs to communicate with one first central server, and the convenience of establishing the communication link can be effectively improved. In addition, only one first central server is adopted, and system joint debugging test work required by a plurality of first central servers can be omitted, so that the workload is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for establishing a communication link according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a communication system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a ground station provided in accordance with an embodiment of the present invention;
fig. 4 is a schematic diagram of an apparatus for establishing a communication link according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a server according to an embodiment of the present invention.
Icon: 10-a first central server; 20-a second central server; 30-a data transmission server; 40-a ground station; 100-a target determination module; 200-a link establishment module; 500-a processor; 501-a memory; 502-a bus; 503 — a communication interface.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problems that in the prior art, a user center needs to communicate with first center servers configured by different relay satellites respectively, the communication is complex, and when a communication link is established, system joint debugging tests need to be performed among different first center servers, so that the workload is large, the embodiment of the invention provides a method, a device, a communication system and a server for establishing a communication link.
For the convenience of understanding the present embodiment, a method for establishing a communication link disclosed in the present embodiment is first described in detail.
The first embodiment is as follows:
referring to fig. 1, a flowchart of a method for establishing a communication link is shown, where the method is applied to a first central server, and the first central server is in communication connection with a plurality of data transmission servers. The first central server in this embodiment may be a server of an operation management center, where the operation management center is configured to receive a request from a user center and establish a communication link according to the request, and the second central server in this embodiment may be a server of the user center, where the user center generally refers to a central-level unit having a control right and a use right for a certain target, such as an application center, a measurement and control center, and the like; the data transmission server is a data transmission server and is mainly used for establishing a communication link with the user center, acquiring data requested by the user center and the like. As shown in fig. 1, the method of the present embodiment includes:
step S01, if a link access request sent by the second central server is received, a target data transmission server is determined based on the link access request; the link access request carries identification information of the target data transmission server.
In one embodiment, the identification information may include information such as an address number and a port number that can be used to identify the server, each data transfer server also includes a preset address number and a preset port number, the first central server searches for a data transfer server having the same address number and port number from among the plurality of data transfer servers according to the address number and the port number in the link access request, and determines the found server as a target data transfer server.
In practical application, after the target data transmission server is determined, the first central server may further continue to send a link access request response signal to the second central server, so as to establish a communication link between the second central server and the target data transmission server. Of course, if the same address number and port number are not found, the link access request fails.
And step S02, establishing a communication link between the second central server and the target data transmission server.
The first central server in the embodiment of the invention can be in communication connection with a plurality of data transmission servers, and the link access request sent by the second central server to the first central server carries the identification information of the target data transmission server which needs to establish communication link connection, so that the first central server can directly establish the communication link between the second central server and the target data transmission server. In this way, the docking between the second central server and the target data transmission server in the plurality of data transmission servers can be realized by adopting one first central server, and compared with the prior art in which a plurality of first central servers are configured for each second central server, only one first central server can be adopted in the embodiment, so that the communication cost can be effectively saved; and when the second central server initiates a communication link request, the second central server only needs to communicate with one first central server, and the convenience of establishing the communication link can be effectively improved. In addition, only one first central server is adopted, and system joint debugging test work required by a plurality of first central servers can be omitted, so that the workload is effectively reduced.
In specific implementation, each data transmission server is in communication connection with a relay satellite, and the relay satellites corresponding to different data transmission servers are different, that is, the data transmission servers correspond to the relay satellites one by one. The relay satellite is one of communication satellites, is mainly used for data transmission, provides data relay and measurement and control services for spacecrafts such as satellites and spacecrafts, and is characterized by large data transmission quantity. In this embodiment, the relay satellite acquires a target object of data for the user center. Further, the link access request also carries a request identifier, task information and link information; the step of establishing a communication link between the second central server and the target data transfer server may be implemented with reference to the following steps (1) and (2):
(1) and sending the received link access request to a target data transmission server so that the target data transmission server judges the legality of the link access request based on the request identifier, and determining the data transmission time between the second central server and a relay satellite corresponding to the target data transmission server based on the task information when the link access request is legal.
In a specific implementation manner, the request identifier includes a User data transfer node UAC (User Address Code, uniform device Address Code, which is used for identifying the device identity when a program processes an application layer data frame), the UAC carries an Address Code, the first central server determines the validity of the link access request by identifying the Address Code, if the Address Code is an Address Code that can be identified by the first central server, the link access request is valid, and when the link access request is valid, the first central server can receive the link access request, thereby further identifying other information in the link access request; the task information comprises a task property identifier and a task code, wherein the task property identifier is used for providing real-time transmission or set time transmission for data transmission time in the communication link, such as whether data is transmitted immediately after the communication link is established by the link access request, and if not, the data is transmitted according to the set time; the task code is the code of one task, and a frame of link access request comprises one task code, and when the user center needs to complete multiple tasks, each task needs to send a frame of link access request according to the task code.
(2) And establishing a communication link between the second central server and the target data transmission server based on the data transmission time and the link information.
Wherein the link information may include one or more of a single-address link, a multiple-access forward link, and a multiple-access reverse link, and the one-frame link access request includes one link information. When a communication link between the second central server and the target data transmission server is established, whether the link access request is valid can be judged according to the data transmission time and the category of the link information.
Through the implementation mode, the link access request can be accurately identified, the data transmission time during the establishment of the communication link is determined, and the communication link is established based on the data transmission time and the link information.
In specific implementation, the link access request is initiated to the first central server within a preset time before the task execution time after the second central server receives the task execution time (i.e., after the data transmission is started). And if the task is not completed before the preset duration of the task execution time, the link access request is invalid. In practical applications, the preset duration may be determined according to the link information, for example, when the link information is a single-address link, the preset duration is 4 minutes; when the link information is a multiple access forward link, the preset time length is 25 seconds; when the link information is a multiple access reverse link, the preset time duration is 5 seconds. For ease of understanding, further examples are as follows: the task execution time is T minutes, the link access request carries a single-address link, the second central server needs to send the link access request before T-4 minutes, and the link access request sent after T-4 minutes (including T-4 minutes) is regarded as invalid.
The embodiment can determine the sending time of the link access request, and avoids the condition that the link access request is invalid due to overtime.
Example two:
referring to fig. 2, a schematic diagram of a communication system is shown, which includes a first central server 10, a second central server 20, and a plurality of data transfer servers 30 communicatively connected to the first central server.
Wherein the second central server 20 is configured to send a link access request to the first central server 10. The first central server 10 is configured to receive the link access request, determine a target data transmission server based on the link access request, and establish a communication link between the second central server 20 and the target data transmission server; the link access request carries identification information of the target data transmission server.
In the embodiment of the present invention, the first central server 10 can be in communication connection with a plurality of data transmission servers 30, and the link access request sent by the second central server 20 to the first central server 10 carries identification information of a target data transmission server that needs to establish a communication link connection, so that the first central server 10 directly establishes a communication link between the second central server 20 and the target data transmission server. In this way, the docking between the second central server 20 and the target data transmission server in the plurality of data transmission servers 30 can be realized by using one first central server 10, and compared with the prior art in which a plurality of first central servers 10 are configured for each second central server 20, only one first central server 10 can be used in this embodiment, so that the communication cost can be effectively saved; and when initiating a communication link request, the second central server 20 only needs to communicate with one first central server 10, which can also effectively improve the convenience of establishing a communication link. In addition, only one first central server is adopted, and system joint debugging test work required by a plurality of first central servers 10 can be omitted, so that the workload is effectively reduced.
In specific implementation, each data transmission server 30 is in communication connection with a relay satellite, and relay satellites corresponding to different data transmission servers 30 are different; the link access request also carries a request identifier, task information and link information; the first central server 10 is further configured to send the received link access request to a target data transmission server; the target data transmission server is used for judging the legality of the link access request based on the request identifier and determining the data transmission time between the second central server 20 and the relay satellite corresponding to the target data transmission server based on the task information when the link access request is legal; the first central server 10 is also used to establish a communication link between the second central server 20 and the target data transmission server based on the data transmission time and the link information. The method and the device can accurately identify the link access request and determine the data transmission time when the communication link is established.
Referring to fig. 3, in particular implementation, the system further includes a ground station 40; each data transfer server 30 is communicatively coupled to a relay satellite via a ground station 40. The ground station 40 is a ground device disposed on the earth for performing space communication, in this embodiment, the relay satellite and the ground station 40 communicate with each other, and the ground station 40 distributes data of the relay satellite, so that the data transmission server 30 can be in communication connection with the relay satellite only through the ground station 40.
In specific implementation, the second central server is configured to initiate the link access request to the first central server within a preset time before the task execution time after the task execution time is received. The embodiment can determine the sending time of the link access request, and avoids the condition that the link access request is invalid due to overtime.
Example three:
referring to fig. 4, a schematic diagram of an apparatus for establishing a communication link is shown, the apparatus is applied to a first central server, and the first central server is in communication connection with a plurality of data transmission servers; the device includes:
a target determining module 100, configured to determine a target data transmission server based on a link access request if the link access request sent by the second central server is received; the link access request carries identification information of a target data transmission server;
and a link establishing module 200, configured to establish a communication link between the second central server and the target data transmission server.
The embodiment of the present invention further provides a server, which includes a processor and a memory, where the memory stores computer-executable instructions capable of being executed by the processor, and the processor executes the computer-executable instructions to implement the steps of the method for establishing a communication link according to the embodiment.
Fig. 5 is a schematic structural diagram of a server according to an embodiment of the present invention, where the server includes: the system comprises a processor 500, a memory 501, a bus 502 and a communication interface 503, wherein the processor 500, the communication interface 503 and the memory 501 are connected through the bus 502; the processor 500 is used to execute executable modules, such as computer programs, stored in the memory 501.
The Memory 501 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 503 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.
Bus 502 can be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
The memory 501 is used for storing a program, the processor 500 executes the program after receiving an execution instruction, and the method executed by the apparatus defined by the flow process disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 500, or implemented by the processor 500.
The processor 500 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 500. The Processor 500 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 501, and the processor 500 reads the information in the memory 501, and completes the steps of the method in combination with the hardware thereof.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the method for establishing a communication link according to the embodiment.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, systems, and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus, method and system may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. The method for establishing the communication link is characterized in that the method is applied to a first central server which is in communication connection with a plurality of data transmission servers; the method comprises the following steps:
if a link access request sent by a second central server is received, determining a target data transmission server based on the link access request; the link access request carries identification information of the target data transmission server;
establishing a communication link between the second central server and the target data transmission server;
each data transmission server is in communication connection with a relay satellite, and the relay satellites corresponding to different data transmission servers are different; the link access request also carries a request identifier, task information and link information;
the step of establishing a communication link between the second central server and the target data transmission server includes:
sending the received link access request to the target data transmission server so that the target data transmission server judges the legality of the link access request based on the request identifier, and determining the data transmission time between the second center server and a relay satellite corresponding to the target data transmission server based on the task information when the link access request is legal;
and establishing a communication link between the second central server and the target data transmission server based on the data transmission time and the link information.
2. The method of claim 1, wherein the link access request is initiated by the second central server to the first central server within a preset duration before a task execution time after the task execution time is received by the second central server.
3. A communication system is characterized by comprising a first central server, a second central server and a plurality of data transmission servers which are in communication connection with the first central server;
the second central server is used for sending a link access request to the first central server;
the first central server is used for receiving the link access request, determining a target data transmission server based on the link access request, and establishing a communication link between the second central server and the target data transmission server; the link access request carries identification information of the target data transmission server;
each data transmission server is in communication connection with a relay satellite, and the relay satellites corresponding to different data transmission servers are different; the link access request also carries a request identifier, task information and link information;
the first central server is also used for sending the received link access request to the target data transmission server; the target data transmission server is used for judging the legality of the link access request based on the request identifier and determining the data transmission time between the second central server and the relay satellite corresponding to the target data transmission server based on the task information when the link access request is legal;
the first central server is further used for establishing a communication link between the second central server and the target data transmission server based on the data transmission time and the link information.
4. The system of claim 3, further comprising a ground station;
and each data transmission server is in communication connection with the relay satellite through the ground station.
5. The system according to claim 3, wherein the second central server is configured to initiate the link access request to the first central server within a preset time period before the task execution time after receiving the task execution time.
6. A server, characterized in that it comprises a processor and a memory, said memory storing computer-executable instructions executable by said processor, said processor executing said computer-executable instructions to implement the steps of the method of establishing a communication link according to any one of claims 1 to 2.
7. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for establishing a communication link according to any one of claims 1 to 2.
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