CN103685008A - Bidirectional message priority marking method and system - Google Patents
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- CN103685008A CN103685008A CN201210317312.6A CN201210317312A CN103685008A CN 103685008 A CN103685008 A CN 103685008A CN 201210317312 A CN201210317312 A CN 201210317312A CN 103685008 A CN103685008 A CN 103685008A
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Abstract
The invention discloses a bidirectional message priority marking method and system. The method comprises the following steps: generating and maintaining a user IP (Internet Protocol) address priority attribute database by an access control gateway according to name and priority information of a specific user IP address or a user IP address pool issued by an AAA (Authentication Authorization Accounting) server; receiving uplink data sent to the server from a client end by the access control gateway, and performing priority marking on an uplink message according to the user IP address priority attribute database; recording priority attribute of a source IP address in the uplink message by the server, and generating a corresponding relationship list of the IP address of the client end and the priority; performing priority marking on an IP message to be sent by a priority mark carried in the client end by the server according to the corresponding relationship list of the IP address of the client end and the priority, and sending the IP message to the client end. According to the method, a large amount of complicated configuration management operations caused when downlink messages are sorted and marked by backbone network edge equipment are avoided and the burden of the edge equipment is reduced.
Description
Technical field
The present invention relates to the communication technology, relate in particular to bi-directional priority flag method and system.
Background technology
Along with the develop rapidly of global IT application,, as a kind of important information infrastructure, play a great role at aspects such as promoting national economic development and social progress in the Internet.Broadband internet construction has risen to the national strategy of global various countries, and the average accessing Internet bandwidth of countries in the world is the trend that progressively promotes.Yet, being subject to the restriction of development communication technologies, the growth of Internet bandwidth does not catch up with people far away and obtains the needed bandwidth of the application emerging in an endless stream on the Internet to increase.All the time, the Internet always be take the mode of a kind of " doing one's best " provides the service of indiscriminate access network as user.
Along with 3G, the fast development of 4G wireless mobile telecommunication technology and the popularization and application of intelligent terminal, the data traffic that mobile Internet business produces, just with geometric growth, has become the very important pith of internet traffic.Meanwhile, comprehensive speed-raising of fixed broadband has expedited the emergence of a large amount of multimedia bandwidth applications, and as Web TV, Online Video, game on line, this take with tradition to surf the web and compares and have a very large change as the comparatively single internet environment of representative.The Internet of today not only needs to carry fixed broadband Internet service, also will carry growing mobile Internet business; Not only the non-real time services such as high speed Internet access, download to be carried, also the business that Online Video, game on line etc. have requirement of real-time will be carried.
The user of accessing Internet also presents diversified trend, and they require to be not quite similar to network providing capability, and the general public user, high-grade VIP user and the client of government and enterprises have different demands to performance index such as the network bandwidth, time delay, shake and packet losses.Therefore, the Internet need to provide for different user and different business the service of differentiation.
For meeting the differentiated service demand of different user and different business, the Internet must have perfect service quality (QoS) mechanism.At present, Differentiated Services (DiffServ) QoS technology is widely used in the IP(Internet Protocol of operator, Internet protocol) in network, user's IP message is in classification and the function such as priority flag, flow control and traffic shaping of network edge finishing service, in network core, implement IP message and press different priorities queue scheduling and congestion control, realize often slipping a line as (PHB) based on class of service.Because DiffServ QoS adopts consistent processing mode to same class business, avoided each Business Stream to control, greatly alleviated the burden of router, be with good expansibility, thereby be applicable to large-scale backbone network.
Current internet, applications is all based on user terminal/server framework, and the information source that user need to obtain is distributed in each Internet data center (IDC) of accessing Internet.IDC can direct-connected IP metropolitan area network, also can connect backbone network, depending on the flux and flow direction situation of Internet service.ISP(Internet Service Provider, Internet Service Provider) Website server that is deployed in each IDC/CP(Content Provider, content supplier) provides colourful information and content service for Internet user.User terminal is generally by dial mode dynamic obtaining IP address, by client-access web site contents such as WEB browsers.Because user's IP address is not changeless, network edge device cannot carry out priority flag to the User IP message of IP address dynamic change.
Summary of the invention
In view of this, the present invention proposes bi-directional priority flag method and system.
According to an aspect of the present invention, bi-directional priority flag method is proposed, wherein:
The concrete Internet protocol of user (IP) address or IP address Pool name and precedence information that access control gateway issues according to authentication，authorization，accounting (AAA) server, generate and maintenance customer IP address priority attribute database;
Access control gateway receives the upstream data that client sends to server, IP heading in resolution data, obtain source IP address in IP heading, corresponding relation according to IP address and priority attribute in IP address priority attribute database, carries out priority flag to uplink message;
The priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority;
By server, according to the client ip address of safeguarding and the corresponding relation list of priority, downlink message to be sent is stamped to the identical priority flag carrying with client, sent to client.
Further, described bi-directional priority flag method, wherein, the user concrete IP address or IP address Pool name and the precedence information that according to aaa server, issue, generate the also database of maintenance customer IP address priority attribute, comprises the following steps:
The concrete IP of the user address issuing for aaa server, access control gateway, according to the User Priority attribute carrying in aaa server authorization message, records the priority attribute of this IP address, and generates the corresponding relation of IP address and priority; Or
The IP address Pool name issuing for aaa server, wherein, each IP address Pool name comprises one or more IP address fields, by access control gateway, according to IP address field, realize this locality of the concrete IP of user address is distributed, and by access control gateway according to pre-configured IP address Pool name and the corresponding relation of user or service priority, generate the corresponding relation of IP address and priority.
Further, described bi-directional priority flag method, wherein, the priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority, comprises the following steps:
Client and server is used transmission control protocol (TCP) transport of internet data;
Server receives the TCP connection request that subscription client sends, the priority flag that this connection request message is stamped with access control gateway;
The priority flag carrying in the connection request message of server record from client, generates the corresponding relation list of client ip address and priority.
Further, described bi-directional priority flag method, wherein, the priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority, comprises the following steps:
Client and server user datagram protocol (UDP) transport of internet data;
When server receives the data that client sends, server be this UDP process creation from the priority attribute of source IP address in the uplink data messages of client, the corresponding relation list of generation client ip address and priority.
Further, described bi-directional priority flag method, wherein, stamps downlink message to be sent the identical priority flag carrying with client, sends to client, further comprising the steps of:
Access control gateway obtains object IP address and priority flag in downlink message head, and mates with IP address priority attribute corresponding in the priority attribute database of safeguarding.
According to a further aspect of the invention, also propose bi-directional priority flag system, comprise access control gateway and server, wherein:
The concrete Internet protocol of user (IP) address or IP address Pool name and precedence information that access control gateway issues according to authentication，authorization，accounting (AAA) server, generate and maintenance customer IP address priority attribute database; Receive the upstream data that client sends to server, IP heading in resolution data, obtain source IP address in IP heading, the corresponding relation according to IP address and priority attribute in IP address priority attribute database, carries out priority flag to uplink message;
The priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority; By server, according to the client ip address of safeguarding and the corresponding relation list of priority, downlink message to be sent is stamped to the identical priority flag carrying with client, sent to client.
Further, described bi-directional priority flag system, wherein:
The concrete IP of the user address issuing for aaa server, access control gateway, according to the User Priority attribute carrying in aaa server authorization message, records the priority attribute of this IP address, and generates the corresponding relation of IP address and priority; Or
The IP address Pool name issuing for aaa server, wherein, each IP address Pool name comprises one or more IP address fields, by access control gateway, according to IP address field, realize this locality of the concrete IP of user address is distributed, and by access control gateway according to pre-configured IP address Pool name and the corresponding relation of user or service priority, generate the corresponding relation of IP address and priority.
Further, described bi-directional priority flag system, wherein:
Client and server is used transmission control protocol (TCP) transport of internet data;
Server receives the TCP connection request that subscription client sends, the priority flag that this connection request message is stamped with access control gateway, the priority flag carrying in the connection request message of server record from client, generates the corresponding relation list of client ip address and priority.
Further, described bi-directional priority flag system, wherein:
Client and server user datagram protocol (UDP) transport of internet data;
When server receives the data that client sends, server be this UDP process creation from the priority attribute of source IP address in the uplink data messages of client, the corresponding relation list of generation client ip address and priority.
Further, described bi-directional priority flag system, wherein:
Access control gateway obtains object IP address and priority flag in downlink message head, and mates with IP address priority attribute corresponding in the priority attribute database of safeguarding.
Based on message priority mark of the present invention, can avoid the configuration management work of the large amount of complex that downlink message classification and marking brought at backbone network edge apparatus, alleviated the burden of edge device.Backbone network only need to according to the priority flag of IP message realize based on class of service often slip a line into, be therefore adapted at the extensive differentiation Internet service of carrier network deploy.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is user Internet access configuration diagram of the present invention;
Fig. 2 is the IP address Pool name of access control gateway configuration of the present invention and the mapping table of user or service priority;
Fig. 3 is the IP address priority attribute database that access control gateway of the present invention generates;
Fig. 4 is the client ip address of server generation of the present invention and the corresponding relation list of priority;
Fig. 5 is bi-directional priority flag method flow schematic diagram of the present invention.
Embodiment
Now with reference to accompanying drawing, describe various exemplary embodiment of the present invention in detail.It should be noted that: unless illustrate in addition, the parts of setting forth in these embodiments and positioned opposite and the numerical value of step do not limit the scope of the invention.
, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not to draw according to actual proportionate relationship meanwhile.
To the description only actually of at least one exemplary embodiment, be illustrative below, never as any restriction to the present invention and application or use.
For the known technology of person of ordinary skill in the relevant, method and apparatus, may not discuss in detail, but in suitable situation, described technology, method and apparatus should be regarded as authorizing a part for specification.
In all examples with discussing shown here, it is exemplary that any occurrence should be construed as merely, rather than as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: in similar label and letter accompanying drawing below, represent similar terms, therefore, once be defined in an a certain Xiang Yi accompanying drawing, in accompanying drawing subsequently, do not need it to be further discussed.
Fig. 1 is user Internet access configuration diagram of the present invention.
Mobile terminal connects mobile packet data gateway by Radio Access Network, and fixed terminal is connected and fixed broad access network gate by fixed broadband access network.User terminal is set up session connection by dial mode and fixed broadband IAD or mobile packet data gateway, for convenience of narration, is referred to as access control gateway.
AAA(Authentication, Authorization, Accounting, authentication，authorization，accounting) server is responsible for user terminal to carry out authentication，authorization，accounting.
Access control gateway, as the edge device of the Internet, by coordinate the access control function of realizing user terminal with aaa server, comprises station address management, session connection control, QoS control etc.
The Internet consists of IP metropolitan area network and backbone network two-level network, and the IDC that is distributed in each department flows to metropolitan area network or the backbone network on situation connecting Internet according to Internet service flow.
During subscriber dialing access network, by access control gateway and aaa server, coordinate user is authenticated, after authentication is passed through, the attributes such as the Internet resources of being contracted by aaa server authorized user (comprising the QoS information such as access bandwidth, user or service priority) and user concrete IP address or IP address Pool name.
In the present invention, the concrete IP of the user address issuing for aaa server, access control gateway, according to the User Priority attribute carrying in aaa server authorization message, records the priority attribute of this IP address.
The IP address Pool name issuing for aaa server, wherein, each IP address Pool name can comprise one or more IP address fields, and access control gateway can be realized this locality of the concrete IP of user address is distributed according to IP address field.Due to access control gateway pre-configured IP address Pool name shown in Fig. 2 and the corresponding relation (Fig. 2 is exemplary illustration) of user or service priority, thereby this IP address Pool name has also implied the priority attribute of IP address.
Access control gateway generates the priority attribute database of IP address as shown in Figure 3, in this database, has preserved the corresponding relation (Fig. 3 is exemplary illustration) of IP address and priority attribute.When user access network, in database, add the corresponding relation of IP address and priority attribute, when user exits network, in database, delete the corresponding relation of this IP address and priority attribute.
When access control gateway receives the upstream data of user terminal transmission, obtain the source IP address in each IP heading, in the priority attribute database of IP address, search the corresponding priority attribute of this source IP address, and then stamp priority flag for IP precedence (IPP) field of this IP message or differentiated Services code point (DSCP) field.PHB is implemented to the up IP message with priority flag in the Internet.
The host-host protocol of the Internet service data flow based on user terminal/server framework is used TCP(Transmission Control Protocol, transmission control protocol conventionally) or UDP(User Datagram Protocol, User Datagram Protoco (UDP)).TCP need to connect for the process communication between client and server, and UDP only provides connectionless service.
When using TCP transport of internet data, generally by client, initiatively initiate the request of connecting, the priority flag that this connection request message is stamped with access control gateway, server receives connection request message and connects with client.
In the present invention, the priority flag carrying in the connection request message of server record from client, generates client ip address as shown in Figure 4 and the corresponding relation list (Fig. 4 is exemplary illustration) of priority.When the connection closed of certain client and server, should from corresponding relation list, delete the corresponding relation of this client ip address and priority.Server, according to the client ip address of safeguarding and the corresponding relation list of priority, is stamped IP message to be sent the identical priority flag carrying with client, sends to client.
For client and server, use the situation of UDP transport of internet data, because Connectionless transport service is used in UDP interprocess communication, server need to be the priority attribute of this process creation client ip address.
When receiving the data of client transmission, the same with TCP, server need to be the priority attribute of this UDP process creation from source IP address in the data message of client, forms the corresponding relation list of client ip address and priority.The UDP standard process creating comprises: port numbers and queue number, in the present invention, also to add the priority attribute that IP address is corresponding.When this UDP procedure termination, should from corresponding relation list, delete the corresponding relation of this client ip address and priority.Server, according to the client ip address of safeguarding and the corresponding relation list of priority, is stamped IP message to be sent the identical priority flag carrying with client, sends to client.
In one embodiment of the invention, if the priority flag in the downstream IP message that operator's distrust server sends can be checked downstream IP message by access control gateway.
Access control gateway obtains in downlink data object IP address and priority flag in IP heading, and mates with IP address priority attribute corresponding in the priority attribute database of safeguarding.If inconsistent, show that server fails according to the rules downlink message to be beaten to priority flag, access control gateway can produce certain assigned ip address server-tag mistake alarm log and report network management system.
In prior art, if IP address is fixed, need to be configured for each user.Need priority under pre-configured user's source IP address with interconnected each edge device of IDC, configuration effort amount is directly proportional with number of users, yet in fact network users is unknowable, and is dynamic change, for IP address, be dynamic assignment, edge device cannot be configured; Or carry out pre-configured according to priority under IP network section.Not only configuration effort amount is huge, and consumer device processing resource, affects equipment performance.
The present invention is for being sent to the upstream data of server by user terminal, the access control gateway of IP metropolitan area network carries out priority flag according to user's IP address priority attribute to IP message; For sent to the downlink data of user terminal by server, by server, according to the user uplink data stream situation receiving, downstream IP message is carried out to priority flag.Because PHB only need be implemented to the downstream IP message with priority flag in the Internet, avoided each edge device at the Internet connection ID C to play the complex configurations management work of priority flag from the downstream IP message of server.
Fig. 5 is bi-directional priority flag method flow schematic diagram of the present invention.
S501, user terminal dial-up access network, access control gateway sends access request to aaa server, aaa server authenticates user profile, after authentication is passed through, to access control gateway, send access grant message, this message includes the QoS attributes such as user's access bandwidth, priority, and user's information such as concrete IP address or IP address Pool name of surfing the Net.
S502, user terminal and access control gateway are set up session connection.The information such as the user concrete IP address that access control gateway issues according to aaa server or IP address Pool name and priority, generate and maintenance customer IP address priority attribute database.When user exits network, need in database, delete the corresponding relation of this IP address and priority attribute.
The concrete IP of the user address issuing for aaa server, access control gateway, according to the User Priority attribute carrying in aaa server authorization message, records the priority attribute of this IP address.
The IP address Pool name issuing for aaa server, wherein, each IP address Pool name can comprise one or more IP address fields, and access control gateway can be realized this locality of the concrete IP of user address is distributed according to IP address field.Due to access control gateway pre-configured the corresponding relation of IP address Pool name and user or service priority, thereby this IP address Pool name has also implied the priority attribute of IP address.
Access control gateway generates the priority attribute database of IP address, in this database, has preserved the corresponding relation of IP address and priority attribute.
S503, when user terminal sends upstream data to server, IP heading in the reception of access control gateway resolution data, obtain source IP address in IP heading, in IP address priority attribute database, search the corresponding priority attribute of this source IP address, and then stamp priority flag for the IPP field of this IP message or dscp field, then the up IP message repeating with priority flag to the Internet.
The priority attribute of source IP address in S504, server record uplink message, generates the corresponding relation list of client ip address and priority.
When if client and server adopt TCP transport of internet data, when server receives the TCP connection request of subscription client transmission, record, from the priority attribute of source IP address in the connection request message of client, generates the corresponding relation list of client ip address and priority.When the connection closed of certain client and server, should from corresponding relation list, delete the corresponding relation of this client ip address and priority.
If when client and server adopt UDP transport of internet data, be the priority attribute of this UDP process creation from source IP address in the uplink data messages of client, generate the corresponding relation list of client ip address and priority.The UDP standard process creating comprises: port numbers and queue number, in the present invention, also to add the priority attribute that IP address is corresponding.When this UDP procedure termination, should from corresponding relation list, delete the corresponding relation of this client ip address and priority.
S505, server, according to the client ip address of safeguarding and the corresponding relation list of priority, are stamped IP message to be sent the identical priority flag carrying with client, send to client.
When initiatively sending UDP message by server to client, if can not find the IP address of client in the corresponding relation list of the client ip address of safeguarding and priority, server should not carry out priority flag to sending to the downlink data message of this client, and downlink message sends with default mode.
In another embodiment of the present invention, as shown in dotted line in Fig. 5 and dotted line frame, access control gateway can check the priority flag of downstream IP message.Access control gateway is according to the IP address priority attribute database of safeguarding, obtains in downlink data object IP address and priority attribute in IP heading, and mates with IP address priority attribute corresponding in database.If inconsistent, show that server fails according to the rules downlink message to be beaten to priority flag, access control gateway can produce certain assigned ip address server-tag mistake alarm log and report network management system.
So far, described the present invention in detail.For fear of covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
May realize in many ways method of the present invention and device.For example, can realize method of the present invention and device by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of described method is only in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specified.In addition, in certain embodiments, can be also the program being recorded in recording medium by the invention process, these programs comprise for realizing the machine readable instructions of the method according to this invention.Thereby the present invention also covers storage for carrying out the recording medium of the program of the method according to this invention.
Although specific embodiments more of the present invention are had been described in detail by example, it should be appreciated by those skilled in the art, above example is only in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (10)
1. bi-directional priority flag method, is characterized in that:
The concrete Internet protocol of user (IP) address or IP address Pool name and precedence information that access control gateway issues according to authentication，authorization，accounting (AAA) server, generate and maintenance customer IP address priority attribute database;
Access control gateway receives the upstream data that client sends to server, IP heading in resolution data, obtain source IP address in IP heading, corresponding relation according to IP address and priority attribute in IP address priority attribute database, carries out priority flag to uplink message;
The priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority;
By server, according to the client ip address of safeguarding and the corresponding relation list of priority, downlink message to be sent is stamped to the identical priority flag carrying with client, sent to client.
2. bi-directional priority flag method as claimed in claim 1, is characterized in that:
The user concrete IP address or IP address Pool name and the precedence information that according to aaa server, issue, generate the also database of maintenance customer IP address priority attribute, comprises the following steps:
The concrete IP of the user address issuing for aaa server, access control gateway, according to the User Priority attribute carrying in aaa server authorization message, records the priority attribute of this IP address, and generates the corresponding relation of IP address and priority; Or
The IP address Pool name issuing for aaa server, wherein, each IP address Pool name comprises one or more IP address fields, by access control gateway, according to IP address field, realize this locality of the concrete IP of user address is distributed, and by access control gateway according to pre-configured IP address Pool name and the corresponding relation of user or service priority, generate the corresponding relation of IP address and priority.
3. bi-directional priority flag method as claimed in claim 1 or 2, is characterized in that:
The priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority, comprises the following steps:
Client and server is used transmission control protocol (TCP) transport of internet data;
Server receives the TCP connection request that subscription client sends, the priority flag that this connection request message is stamped with access control gateway;
The priority flag carrying in the connection request message of server record from client, generates the corresponding relation list of client ip address and priority.
4. bi-directional priority flag method as claimed in claim 1 or 2, is characterized in that:
The priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority, comprises the following steps:
Client and server user datagram protocol (UDP) transport of internet data;
When server receives the data that client sends, server be this UDP process creation from the priority attribute of source IP address in the uplink data messages of client, the corresponding relation list of generation client ip address and priority.
5. bi-directional priority flag method as claimed in claim 1 or 2, is characterized in that:
Downlink message to be sent is stamped to the identical priority flag carrying with client, sent to client, further comprising the steps of:
Access control gateway obtains object IP address and priority flag in downlink message head, and mates with IP address priority attribute corresponding in the priority attribute database of safeguarding.
6. bi-directional priority flag system, is characterized in that, comprises access control gateway and server:
The concrete Internet protocol of user (IP) address or IP address Pool name and precedence information that access control gateway issues according to authentication，authorization，accounting (AAA) server, generate and maintenance customer IP address priority attribute database; Receive the upstream data that client sends to server, IP heading in resolution data, obtain source IP address in IP heading, the corresponding relation according to IP address and priority attribute in IP address priority attribute database, carries out priority flag to uplink message;
The priority attribute of source IP address in server record uplink message, generates the corresponding relation list of client ip address and priority; By server, according to the client ip address of safeguarding and the corresponding relation list of priority, downlink message to be sent is stamped to the identical priority flag carrying with client, sent to client.
7. bi-directional priority flag system as claimed in claim 6, is characterized in that:
The concrete IP of the user address issuing for aaa server, access control gateway, according to the User Priority attribute carrying in aaa server authorization message, records the priority attribute of this IP address, and generates the corresponding relation of IP address and priority; Or
The IP address Pool name issuing for aaa server, wherein, each IP address Pool name comprises one or more IP address fields, by access control gateway, according to IP address field, realize this locality of the concrete IP of user address is distributed, and by access control gateway according to pre-configured IP address Pool name and the corresponding relation of user or service priority, generate the corresponding relation of IP address and priority.
8. bi-directional priority flag system as described in claim 6 or 7, is characterized in that:
Client and server is used transmission control protocol (TCP) transport of internet data;
Server receives the TCP connection request that subscription client sends, the priority flag that this connection request message is stamped with access control gateway, the priority flag carrying in the connection request message of server record from client, generates the corresponding relation list of client ip address and priority.
9. bi-directional priority flag system as described in claim 6 or 7, is characterized in that:
Client and server user datagram protocol (UDP) transport of internet data;
When server receives the data that client sends, server be this UDP process creation from the priority attribute of source IP address in the uplink data messages of client, the corresponding relation list of generation client ip address and priority.
10. bi-directional priority flag system as described in claim 6 or 7, it is characterized in that: access control gateway obtains object IP address and priority flag in downlink message head, and mate with IP address priority attribute corresponding in the priority attribute database of safeguarding.
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| CN114006867A (en) * | 2021-09-29 | 2022-02-01 | 苏州浪潮智能科技有限公司 | Method, system, device and storage medium for controlling message transmission priority |
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| CN102394816A (en) * | 2011-10-28 | 2012-03-28 | 华为技术有限公司 | User service quality control method and equipment for virtual private network |
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