CN105323317A - Method and system for supporting stateful anycast in NDN based on analyzer - Google Patents
Method and system for supporting stateful anycast in NDN based on analyzer Download PDFInfo
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- CN105323317A CN105323317A CN201510712687.6A CN201510712687A CN105323317A CN 105323317 A CN105323317 A CN 105323317A CN 201510712687 A CN201510712687 A CN 201510712687A CN 105323317 A CN105323317 A CN 105323317A
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- server
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/146—Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding
Abstract
The invention discloses a method and system for supporting stateful anycast in a NDN based on an analyzer. The method comprises the following steps: sending an analysis request of a certain universal service name to the analyzer by a service request end; receiving an analysis response returned by the analyzer, and obtaining a server corresponding to the universal service name or a service name list bound with the server from the analysis response; selecting one server or one service name bound with the server from the server or the service name list bound with the server; sending a service request through the service name bound with the server; and receiving response data sent by the server. The method and the system disclosed by the invention can support stateful anycast in the NDN; and the forwarding logic of an NDN content router forwarding engine cannot be destroyed.
Description
Technical field
The present invention relates to named data network (NamedDataNetworking, NDN) technical field, particularly relate to and a kind ofly appoint based on held state in the NDN of resolver the method and system broadcast.
Background technology
At present, user has been that main to transfer content obtaining to be main from point-to-point communication to the access of the Internet.And traditional TCP/IP network only transferring content, not perceived content, thus cause redundant flow transmission a large amount of on network.In order to solve the content blast caused due to content obtaining, research circle proposes the network N DN centered by content, achieve the decoupling zero of content and address and sender and recipient, and provide ubiquitous built-in buffer memory to meet the asynchronous access with heavy-tailed feature of user to content.
Existing the Internet exist many have on a large scale hundreds of millions service, as Google, Facebook, micro-letter etc.These services usually have one group physically to distribute but provide server or the server cluster of same services.For user, this kind of service belongs to Anycast service in essence.But the transmission mode of existing NDN, by sender and recipient's decoupling zero, is difficult to ensure that Request routing in same session is to same service node, causing cannot direct real standing state Anycast service.Therefore, be necessary that proposing to prop up held state in a kind of NDN appoints the technology broadcast.
Summary of the invention
The present invention, for solving the problems of the technologies described above, provides in a kind of NDN of support the method and system having state to appoint to broadcast, can not destroy the forwarding logic of CCN content router forwarding engine.Described technical scheme is as follows:
First aspect, the present invention proposes a held state in a kind of NDN and appoints the service request terminal method broadcast, and comprises the steps:
The analysis request to certain generic service name is sent to resolver;
Receive the parsing response that resolver returns, analytically in response, the acquisition server corresponding with generic service name or server bind the list of Service name;
The Service name of a server or server binding is selected from the service list that server or server are bound;
Service request is sent by the Service name bound with server;
The response data that reception server sends.
Wherein, generic service name corresponds to the Service name of one group of server or server binding, can be constructed the Service name of server binding by server and generic service name, and the Service name of each server binding provides identical service.
Wherein, described analysis request, except comprising generic service name, optionally can also comprise the information that request end is relevant.
Wherein, depend on the strategy of analysis service, the server of homogeneous analysis request acquisition or the list of server binding Service name may be not different for different request ends or same request end.
Wherein, after being parsed, request service end sends service request by the Service name bound with server, and the request name of this service request can also optionally comprise the information relevant to request end.
Wherein, the response data that service request terminal receives from server, wherein selectivity can comprise unique session identification that server end is session generation, service request terminal should comprise this session identification, with convenient service device end, service request is mapped to built vertical session in subsequent request.
Second aspect, the present invention proposes a held state in a kind of NDN and appoints the system broadcast, and mainly comprises:
Client: for tectonic knot request, receives and resolves response, selects the server providing service; Also for constructing service request, receive service response.
Service end: for receiving service request, maintains the session status of service, generates response message; Also for server identification prefix is noticed to route system;
Intermediate router: for advertising of route and the forwarding of server identification prefix, foundation is transmitted, and Forward-reques message, returns response message;
Resolution server: for receiving analysis request, returning and resolve response;
Registrar: for receiving the registration request of generic service name and server or server binding Service name corresponding relation, and store this corresponding relation.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
By the present invention, appointing of held state can be propped up broadcast in NDN, and transparent to concrete application service.In addition, technology proposed by the invention does not destroy the forwarding logic of CCN content router forwarding engine.
The aspect that the present invention adds and advantage will part provide in the following description, and these will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 shows a held state in the NDN according to an embodiment of the present invention and appoints the service request terminal method flow diagram broadcast.
Fig. 2 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.
Fig. 3 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.
Fig. 4 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.
Fig. 5 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.
Fig. 6 shows a held state in the NDN according to an embodiment of the present invention and appoints the system schematic broadcast.
Embodiment
Be described below in detail embodiments of the present invention, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording used in specification of the present invention " comprises " and refers to there is described feature, integer, step, operation, element and/or assembly, but does not get rid of and exist or add other features one or more, integer, step, operation, element, assembly and/or their group.Should be appreciated that, when we claim element to be " connected " or " coupling " to another element time, it can be directly connected or coupled to other elements, or also can there is intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises one or more arbitrary unit listing item be associated and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Fig. 1 shows a held state in the NDN according to an embodiment of the present invention and appoints the service request terminal method flow diagram broadcast, and comprising:
101, send the analysis request to certain generic service name to resolver;
102, receive the parsing response that resolver returns, analytically in response, the acquisition server corresponding with generic service name or server bind the list of Service name;
103, from server or server binding service list, select a server or server binding Service name;
104, send service request by the Service name bound with server;
105, the response data that reception server sends.
Wherein, generic service name corresponds to the Service name bound with one group of server or server, can be constructed the Service name of server binding by server and generic service name, and the Service name of each server binding provides identical service.
Described analysis request, except comprising generic service name, optionally can also comprise the information that request end is relevant.The benefit comprising request end relevant information in analysis request is under the prerequisite not changing NDN forwarding logic, to ensure that the analysis request to identical content that different requestor sends can not be suppressed by intermediary routing node, also can not be buffered and served.On the other hand, comprise request end relevant information in analysis request name and resolution server can be allowed to obtain the customized information of request end, thus provide personalized intelligently parsing service, the server that such as chosen distance requestor is nearer returns to requestor.
In order to analysis request being routed to resolution server, needing the mark prefix of resolution server to notice in the routing system, and in transmitting, set up corresponding list item.
Depend on the strategy of analysis service, the server of homogeneous analysis request acquisition or the list of server binding Service name may be not different for different request ends or same request end.Such as, server end can adopt Round-Robin strategy, and to realize the load balancing of different server, server end can also adopt other strategy, and the strategy that the present invention adopts server end is without restriction.
After being parsed, request service end selects a server, sends service request by the Service name bound with server.The server list that request service end can return according to resolution server is simply attempted one by one, until a success response.Request service end also can adopt other server selection policies, and the present invention is selected in the server list returned request and selects the strategy of server without restriction.
In order to by comprising the request forward of server binding Service name to correct server, server identification prefix can be needed to notice in the routing system, and set up corresponding list item in transmit.
When service request terminal sends service request, the request name of this service request, except comprising the Service name of server binding, can also optionally comprise the information relevant to request end.The benefit comprising request end relevant information is in the request under the prerequisite not changing NDN forwarding logic, to ensure that the request to identical content that different requestor sends can not be suppressed by intermediary routing node, also can not be buffered and served.On the other hand, comprise request end relevant information in request name and server can be allowed to obtain the customized information of request end, thus personalized service is provided.
After service request terminal sends service request, wait for the response data received from server.Server, after first time receives the request of a service conversation, can selectivity be unique session identification that session generates, and be included in first response data.After service request terminal receives first response data, this unique session identification can be extracted, and in subsequent request, comprise this session identification, with convenient service device end, service request is mapped to built vertical session.
Fig. 2 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.Service request terminal Requestor is first using resolution server mark and generic service name as the name prefix of analysis request message, and alternatively in the information that additional request end is below relevant, the request of the analysis request sent is called :/resolver/servicename/ [client-specific-info].Intermediate router will identify prefix/resolver according to resolution server and analysis request will be routed to resolution server.Resolution server obtains analysis request, and extracts request end relevant information client-specific-info alternatively.Resolution server is resolved according to generic service name servicename and optional request end relevant information client-specific-info.Resolution server may obtain analysis result according to the buffer memory of self, or resolution server may need to carry out alternately with registrar, obtains analysis result, and the strategy that the present invention obtains analysis service to resolution server is without restriction.After obtaining analysis result, resolution server returns one group server identification SN providing this service corresponding to generic service name servicename to request service end
1, SN
2..., SN
k, as parsing response.
In above process, service request terminal and resolution server can not be based upon on NDN system alternately, realized by third-party resolution system, as DNS, the present invention is without restriction to concrete analysis service presentation mode.
After service request terminal receives this parsing response, according to self strategy, select one of them server i, structure service request messages, its request name is made up of server identification, generic service name and optional request end relevant information, and form is :/SN
i/ servicename/ [client-specific-info].Intermediate router will according to server identification SN
iservice request is routed to server i.This server obtains service request, and extracts request end relevant information client-specific-info alternatively, and server can optionally be provided personalized service according to client-specific-info.Client-specific-info under server record, as the Map Key of this service conversation.Tectonic response message after server, and return to service request terminal.
Fig. 3 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.First three step in this figure is identical with Fig. 2.In the 4th step, server is that this service conversation generates a unique session identification SID, and then construct first response message, response message comprises the unique session identification SID for this session distributes.After service request terminal receives this first response message, extract SID.Service request terminal constructs follow-up request message, and mark, generic service mark, session identification and optional request end relevant information common combination that the prefix of its request name is bound by server form, and its form is :/SN
i/ servicename/SID/ [client-specific-info].This request will by intermediate router according to prefix/SN
ibe routed to server S N
i.First server extracts SID after receiving this request, according to SID, this request is mapped to the session existed.Server optionally can provide personalized service according to client-specific-info, and tectonic response.The name of the request that the name direct copying responded is corresponding, namely prefix is /SN
i/ servicename/SID/ [client-specific-info].This response message will return to service request terminal along the track of PIT.
Fig. 4 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.The step of this figure is substantially identical with Fig. 2.Its difference is, generic service name corresponds to one group of Service name bound with server.That resolution server directly provides in parsing response is the list SNAME that server binds Service name
1, SNAME
2..., SNAME
k, but not server identification list.After receiving this parsing response, the Service name structure service request that service request terminal directly utilizes server to bind, and comprise request end relevant information alternatively, the name of service request is /SNAME
i/ [client-specific-info].
Fig. 5 shows a held state in the NDN according to an embodiment of the present invention and appoints the sequential chart broadcast.The step of this figure is substantially identical with Fig. 3.Its difference is, generic service name corresponds to one group of Service name bound with server.That resolution server directly provides in parsing response is the list SNAME that server binds Service name
1, SNAME
2..., SNAME
k, but not server identification list.After receiving this parsing response, the Service name structure service request that service request terminal directly utilizes server to bind, and comprise request end relevant information alternatively, the name of service request is /SNAME
i/ [client-specific-info].
Fig. 6 shows a held state in the NDN according to an embodiment of the present invention and appoints the system schematic broadcast.Wherein, the server of application service is provided to be made up of k server server 1, server 2 ..., server k, resolution server and registrar provide parsing and registration service respectively, and the route network of n router router one, router two ..., router n formation connects different server and client sides.Wherein, client is used for tectonic knot request, receives and resolves response, selects server; Also for constructing service request, receive service response.Service end, for receiving service request, maintains the session status of service, generates response message; Also for server identification prefix is noticed to route system.Intermediate router is used for advertising of route and the forwarding of server identification prefix, and foundation is transmitted, and Forward-reques message, returns response message.Resolution server is for receiving analysis request, returning and resolve response.Registrar for receiving the registration request of generic service name and server or server binding Service name corresponding relation, and stores this corresponding relation.
By technical scheme proposed by the invention, the Anycast service of held state can be propped up in NDN network, and providing of this ability does not change the content naming rule of the NDN network architecture and the processing logic of NDN forwarding engine.
Those skilled in the art of the present technique are appreciated that the present invention can relate to the equipment for performing the one or more operation in operation described in the application.Described equipment for required object and specialized designs and manufacture, or also can comprise the known device in all-purpose computer, and described all-purpose computer activates or reconstructs with having storage procedure Selection within it.Such computer program can be stored in equipment (such as, computer) in computer-readable recording medium or be stored in and be suitable for store electrons instruction and be coupled in the medium of any type of bus respectively, described computer-readable medium include but not limited to any type dish (comprise floppy disk, hard disk, CD, CD ?ROM and magneto optical disk), memory (RAM), read-only memory (ROM), electrically programmable ROM, electric erasable ROM (EPROM), electrically erasable ROM (EEPROM), flash memory, magnetic card or light card immediately.Computer-readable recording medium comprises for be stored by the readable form of equipment (such as, computer) or any mechanism of transmission information.Such as, computer-readable recording medium comprise memory (RAM) immediately, read-only memory (ROM), magnetic disk storage medium, optical storage medium, flash memory device, with electricity, light, sound or signal (such as carrier wave, infrared signal, digital signal) etc. that other form is propagated.
Those skilled in the art of the present technique are appreciated that the combination that can realize the frame in each frame in these structure charts and/or block diagram and/or flow graph and these structure charts and/or block diagram and/or flow graph with computer program instructions.These computer program instructions can be supplied to the processor of all-purpose computer, special purpose computer or other programmable data processing methods to generate machine, thus create the method for specifying in the frame of implementation structure figure and/or block diagram and/or flow graph or multiple frame by the instruction that the processor of computer or other programmable data processing methods performs.
Those skilled in the art of the present technique are appreciated that various operations, method, the step in flow process, measure, the scheme discussed in the present invention can be replaced, changes, combines or delete.Further, there is various operations, method, other steps in flow process, measure, the scheme discussed in the present invention also can be replaced, change, reset, decompose, combine or delete.Further, of the prior art have also can be replaced with the step in operation various disclosed in the present invention, method, flow process, measure, scheme, changed, reset, decomposed, combined or deleted.
The above is only some embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. appoint based on a held state in the NDN of resolver the service request terminal method broadcast, comprise the steps:
The analysis request to certain generic service name is sent to resolver;
Receive the parsing response that resolver returns, analytically in response, the acquisition server corresponding with generic service name or server bind the list of Service name;
The Service name of a server or server binding is selected from the service list that server or server are bound;
Service request is sent by the Service name bound with server;
The response data that reception server sends.
2. the method for claim 1, is characterized in that:
Described analysis request, except comprising generic service name, optionally can also comprise the information that request end is relevant.
3. the method for claim 1, is characterized in that, the server corresponding with generic service name obtained in described analytically response or server bind the list of Service name, it is characterized in that:
The server of homogeneous analysis request acquisition or the list of server binding Service name may be not different for different request ends or same request end.
4. the method for claim 1, is characterized in that, sends service request, it is characterized in that by the Service name bound with server:
The name of described service request, can also optionally comprise the information relevant to request end.
5. the method for claim 1, is characterized in that, the response data that described reception server sends, and it is characterized in that:
Response data selectivity can comprise unique session identification that server end is session generation, and request end comprises this session identification, with convenient service device end, service request is mapped to built vertical session in subsequent request.
6. in NDN, a held state appoints the system broadcast, and mainly comprises:
Client: for tectonic knot request, receives and resolves response, selects server; Also for constructing service request, receive service response;
Service end: for receiving service request, maintains the session status of service, generates response message; Also for server identification prefix is noticed to route system;
Intermediate router: for advertising of route and the forwarding of server identification prefix, foundation is transmitted, and Forward-reques message, returns response message;
Resolution server: for receiving analysis request, returning and resolve response;
Registrar: for receiving the registration request of generic service name and server or server binding Service name corresponding relation, and store this corresponding relation.
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| EP3855708A4 (en) * | 2018-09-17 | 2022-04-20 | Nokia Solutions and Networks Oy | Service distribution device and method in software defined network, and storage medium |
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| CN105323317B (en) | 2019-04-26 |
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