CN102098349A - Address mapping method and access service node - Google Patents
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- CN102098349A CN102098349A CN2009102527526A CN200910252752A CN102098349A CN 102098349 A CN102098349 A CN 102098349A CN 2009102527526 A CN2009102527526 A CN 2009102527526A CN 200910252752 A CN200910252752 A CN 200910252752A CN 102098349 A CN102098349 A CN 102098349A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W8/26—Network addressing or numbering for mobility support
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Abstract
The invention relates to an address mapping method and an access service node. The access service node is provided with a common address mapping table, wherein the common address mapping table comprises a mapping relationship of a common identity mark and a position mark. The address mapping method comprises the following steps that the access service node receives a data message, wherein the data message comprises a target identity mark; the access service node inquires the common address mapping table according to the target identity mark in the data message; if a corresponding target position mark is inquired in the common address mapping table, the access service node forwards the data message according to the target position mark; and otherwise, the access service node is interacted with a mapping server to forward the data message. With the method and the access service node, the data flow between the access service node and the mapping server can be reduced and the data message processing efficiency can be increased.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and access service node of map addresses.
Background technology
Research about information network architecture of future generation is one of current popular topic.The viewpoint that great majority research is at present accepted is: future network will be unified bearer network with the Internet.The Internet has kept high speed development always since it is born, become the communication network of current the most successful, tool vitality, characteristics such as its flexible extensibility, packet switching efficiently, terminal strong functions meet the design needs of new generation network very much, and the Internet will be the main reference source of new generation network design.
Yet it is optimum that the structure of the Internet also is far from reaching, and has a lot of great design problems, wherein relatively be typically the problem of the double attribute of IP address, be both representative of consumer identity of IP address, the residing network topology of representative of consumer, the i.e. double attribute of IP address again.The Internet was invented in nineteen seventies, and people will exist a large amount of portable terminals and multi-home terminal today difficult to calculate in the world, and therefore Internet protocol stack at that time mainly is to design at the terminal that connects in " fixing " mode.Under network environment at that time, because terminal can not move to other position from a position basically, the address that sends is exactly the address that receives, the road is through being reversible, so having the IP address of identity and position double attribute can extraordinary work, do not produce any conflict between the identity attribute of IP address and the position attribution.Network demand has at that time exactly been satisfied in IP address while representative capacity and position.From network environment at that time, this design is simply effective, has simplified the hierarchical structure of protocol stack.But mathematical is to exist internal contradictions between the identity attribute of IP address and the position attribution.It all is equality that the identity attribute of IP address requires any two IP addresses, though the IP address can be distributed according to organization, does not have inevitable relation between the IP address of continuous programming code, does not perhaps have inevitable relation at least on topology location; The position attribution of IP address then requires IP address topology Network Based (rather than organization) to distribute, the IP address that is in the same subnet all should be in the continuous IP address block, so just can make the IP address prefix polymerization in the network topology, thereby reduce the clauses and subclauses of the routing table of router device, guarantee the extensibility of route system.
Generally speaking, the inner contradictions of IP address double attribute will cause following subject matter:
1. but route scaling problem.There is a basic supposition in extensibility about internet routing system:
" address is distributed according to topology, and perhaps topology is disposed the two essential one according to the address ".The identity attribute of IP address requires the IP address to distribute based on the organization under the terminal (rather than network topology), and this distribution will keep certain stability, can not often change; And the position attribution of IP address requires IP address topology Network Based to distribute, so that guarantee the extensibility of route system.Like this, two kinds of attributes of IP address have just produced conflict, but have finally caused the scaling problem of internet routing system.
2. mobility problem.The identity attribute of IP address requires the IP address should not change along with the change of terminal location, can guarantee that like this communication that is bundled on the identity do not interrupt, also can guarantee terminal after moving, other terminal still can use its identity to establish a communications link with it; The position attribution of IP address then requires the IP address to change along with the change of terminal location, so that the IP address can polymerization in new network topology, otherwise the terminal that network just is necessary for after moving keeps independent routing iinformation, thereby causes the sharp increase of routing table entry.
3. many locals problem.Many locals are often referred to the network insertion by a plurality of ISP simultaneously of terminal or network to the Internet.The advantage of many locals technology comprises reliability, the flow load balance between a plurality of ISP of support that increases network and improves total available bandwidth etc.But the inner contradictions of IP address double attribute make that many locals technology is difficult to realize.The identity attribute of IP address requires a multi-home terminal all the time other terminal to be represented constant identity, and no matter this multi-home terminal is to be linked into the Internet by several ISP; The position attribution of IP address then requires a multi-home terminal to use different IP address communications in different ISP networks, could guarantee that like this IP address of terminal can polymerization in the topology of ISP network.
4. safety and location privacy problem.Because the IP address comprises the identity information and the positional information of terminal simultaneously, so Correspondent Node and malice listener-in can obtain the identity information and the topology location information of this terminal simultaneously according to the IP address of a terminal.Generally speaking, since the architecture of traditional the Internet was set up, earth-shaking variation had taken place in the technological accumulation and inheritance of the Internet and user group, and the Internet need be reformed thereupon.The double attribute problem of IP address is that the puzzlement the Internet continues one of basic reason of development, the identity attribute of IP address separated with position attribution, and be a good idea that solves problem that the Internet faces.New network will design based on this thinking, propose a kind of identity information separates mapping with positional information network configuration, to solve some serious drawbacks that existing the Internet exists.
In order to solve the problem of identity and position, industry has been carried out a large amount of research and exploration, and all identity all are that the identity that originally is bundled on the IP address is separated with the position double attribute with the basic thought of position separation scheme.Wherein, some scheme adopts URL (the URL(uniform resource locator) UniformResource Locator of application layer, URL is used for intactly describing a kind of identification method that Internet goes up webpage and other resource addresses) or FQDN (qualified domain name Fully Qualified Domain Name) as the identify label of terminal, as IPNL (IP Next Layer belongs to the mode that NAT expands framework), TRIAD (A Scalable Deployable NAT-based Intemet Architecture) etc.; Some scheme has been introduced new name space as identify label, is being to increase host identification on the marked network layer as HIP (Host Identity Protocol) with the IP address; Some scheme is classified the IP address, and part IP is as identify label, and part IP is as station location marker, as LISP (Locator/ID SeparationProtocol) etc.; " a kind of internet access method that separates with the position based on identity " that be disclosed in the patent application CN 1801764 on July 12nd, 2006 proposes a solution, use the station location marker of IP address as main frame, the leading-in end host identification solves the problem that identity is separated with the position as identify label.
Above-mentioned motion all separates solution from some local propositions realization identity under the existing network architecture of problem with the position with scheme, and separate with identity the position is the core technology of following data communication network, particularly mobile data communication network.
No matter above solution adopts which kind of to identify and represents terminal identity information and which kind of adopts identify represent terminal positional information, all must set up the mapping relations between identify label and the station location marker, uses during for network equipment addressing.These mapping relations are kept in the mapping server, the access service node receives the packet of sending from terminal, if the purpose identify label of packet is unknown, need remove the identity location map table of query mappings server, the destination locations sign is found in identify label according to purpose, will occur to corresponding network after the packet encapsulation.For the access service node, for packet is forwarded, it need destination locations identifies or carry out the packet forwarding by mapping server to obtain alternately with mapping server, this will increase the data traffic between access service node and the mapping server undoubtedly, and then influence the processing speed of network.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of address mapping method and access service node, to reduce the data traffic between access service node and the mapping server, improves the data message treatment effeciency.
For solving above technical problem, the invention provides a kind of address mapping method, this method realizes that based on the identity locator separation network described access service node is provided with address mapping table commonly used, comprising the identify label commonly used and the mapping relations of station location marker; This method comprises:
Described access service node receiving data packets is comprising the purpose identify label;
Described access service node is inquired about described address mapping table commonly used according to the purpose identify label in the data message;
If inquire corresponding destination locations sign in described address mapping table commonly used, then described access service node is transmitted described data message according to described destination locations sign; Otherwise carry out data message forwarding alternately with mapping server.
Further, described address mapping table commonly used is a system configuration, or according to the broadcasting regular update of mapping server.
Further, before the described access service querying node address mapping table commonly used, the address mapping table of learning in the inquiry local cache if do not find described destination locations sign, is inquired about described address mapping table commonly used more earlier.
The method of claim 1, it is characterized in that: when described access service node does not inquire corresponding destination locations sign in described address mapping table commonly used, inquire about the address mapping table of learning in the local cache earlier, if do not find described destination locations sign, obtain described destination locations sign to described mapping server again.
Further, described access service node and the mapping server process of carrying out data message forwarding alternately realizes in the following manner:
Described access service node is transmitted to message the mapping server of mapping Forwarding plane; This mapping server inquire address mapping table obtains the encapsulate forwarded that data message is realized in destination locations sign back; Or,
Described access service node is to the station location marker of mapping server acquisition request purpose identify label correspondence; Behind the mapping server inquire address mapping table, return described destination locations sign to described access service node; Described access service node is realized the encapsulate forwarded of data message according to the destination locations sign of obtaining.
For solving above technical problem, the present invention also provides a kind of access service node, and described access service node is arranged in the identity locator separation network, comprising:
The message receiver module is used for receiving data packets, comprising the purpose identify label;
The station location marker acquisition module, be connected with described message receiver module, be used for inquiring about described address mapping table commonly used or obtaining the destination locations sign of described purpose identify label correspondence, and notify described packet forwarding module from mapping server according to the purpose identify label of described data message;
Packet forwarding module is connected with described station location marker acquisition module, is used for the described data message of destination locations sign forwarding according to the purpose identify label correspondence of the data message that receives;
Address mapping table commonly used is connected with described station location marker acquisition module, is used to preserve address mapping relation commonly used.
Further, described address mapping table commonly used is a system configuration.
Further, described access service node also comprises the mapping relations maintenance module that is connected with described address mapping table commonly used, and described mapping relations maintenance module is used for upgrading described address mapping table commonly used according to the address mapping relation commonly used of mapping server broadcasting.
Further, described access service node also comprises the mapping relations cache module that is connected with the station location marker acquisition module, be used to learn and the mapping relations of destination locations sign that the described station location marker acquisition module of buffer memory obtains from mapping server and corresponding purpose identify label, and learn the identify label of source end in the data cached message also and the mapping relations of station location marker; Described station location marker acquisition module is before described mapping server obtains described destination locations sign, and described mapping relations cache module of inquiry and address mapping table commonly used when all not inquiring corresponding destination locations sign, are obtained to described mapping server more earlier.
For solving above technical problem, the present invention also provides another kind of access service node, and described access service node is arranged in the identity locator separation network, comprising:
The message receiver module is used for receiving data packets, comprising the purpose identify label;
Local position sign enquiry module is connected with described message receiver module, is used for inquiring about described address mapping table commonly used according to the purpose identify label of described data message, and notifies described packet forwarding module;
Packet forwarding module, be connected with described local position sign enquiry module, be used for transmitting described data message: when obtaining the destination locations sign according to the Query Result of described local position sign enquiry module, according to the described data message of described destination locations sign routing forwarding, otherwise with described data message forwarding to mapping server;
Address mapping table commonly used is connected with described local position sign enquiry module, is used to preserve address mapping relation commonly used.
Further, described access service node also comprises the mapping relations maintenance module that is connected with described address mapping table commonly used, and described mapping relations maintenance module is used for upgrading described address mapping table commonly used according to the address mapping relation commonly used of mapping server broadcasting.
Further, described access service node also comprises the mapping relations cache module that is connected with local position sign enquiry module, is used for learning and the identify label of data cached message source end and the mapping relations of station location marker; Before described local position sign enquiry module notifies described packet forwarding module to transmit data message, the described mapping relations cache module of inquiry reaches address mapping table commonly used earlier, when all not inquiring corresponding destination locations sign, reinform described packet forwarding module and transmit data message.
Address mapping method of the present invention and access service node configuration are used address mapping table always, the access service node is after receiving the packet that terminal sends, if the purpose identify label of packet can be found in this table, then just can find the destination locations sign of packet in this locality, and need not the mapping server inquiry, thereby reduce the data traffic between access service node and the mapping server.
Description of drawings
Fig. 1 is the network topology schematic diagram of the identity position separation architecture that the present invention relates to;
Fig. 2 is an address mapping method schematic diagram of the present invention;
Fig. 3 is the embodiment schematic diagram of address mapping method of the present invention;
Fig. 4 is the execution mode schematic diagram of access service node of the present invention;
Fig. 5 is the another execution mode schematic diagram of access service node of the present invention.
Embodiment
The main thought of address mapping method of the present invention and access service node is, set up address mapping table commonly used at the access service node of identity locator separation network, when carrying out the message forwarding, inquiry earlier should be used address mapping table always, when not inquiring, undertaken by normal destination locations sign acquiring method again.
The said identify label of the present invention refers to be used for the sign of identification terminal identity information, be not limited to adopt URL (URL(uniform resource locator) Uniform Resource Locator), FQDN (qualified domain name Fully Qualified Domain Name), IPNL (IP Next Layer belongs to the mode that NAT expands framework), TRIAD (A Scalable Deployable NAT-based Internet Architecture) or the IP address of application layer; Station location marker of the present invention refers to be used for the sign of the routing iinformation of identification terminal, and it also is not limited to the IP address.
What preserve in the said address mapping table commonly used of the present invention is the identify label that use always, public or that often do not change and the mapping relations of station location marker, for example the identity location map of some portal websites relation.
Based on network identity position separation architecture (to call this framework in the following text) has multiple, below in conjunction with Fig. 1 a kind of framework is wherein described.As shown in Figure 1, network is divided into Access Layer and core layer, for each user in the network distributes unique identify label AID, this identify label AID remains constant in moving process; Two kinds of sign types are arranged in the network: identify label AID and station location marker RID, wherein identify label AID can only use at Access Layer, and station location marker RID can only use in core layer.
The topological schematic diagram of this framework as shown in Figure 1.Under this framework, network is divided into Access Network and backbone network, and Access Network is positioned at the edge of backbone network, is responsible for the access of all terminals.Backbone network is responsible for the route by the terminal of different Access Networks accesses.The access service node is positioned at the separation of backbone network and Access Network, with the Access Network interface, with backbone interface.Access Network and backbone network do not have overlapping on topological relation.Communicating between user terminal only needs to use the identify label of opposite end to carry out.The access service node provides access service, maintenance customer to connect for terminal and transmits user data.
Be divided into two planes during the networking of this framework backbone network: mapping Forwarding plane, broad sense Forwarding plane.
Broad sense Forwarding plane major function is to carry out routing and transmit data message according to the station location marker RID in the data message.Data routing forwarding behavior in the broad sense Forwarding plane is consistent with the Legecy IP network.
Mapping Forwarding plane major function is to preserve the map information of mobile node identity position, handles the registration flow process of mobile node, handles the position enquiring flow process of Correspondent Node, and it is the data message of destination address that route is also transmitted with identify label AID.
The main network element and the functional entity of this framework comprise:
ASN (Access Service Node, the access service node): the annexation of ASN maintenance terminal and network, be terminal distribution RID, handle switching flow, handle and register flow process, handle chargings/authorizing procedure, the AID-RID mapping relations of maintenances/inquiry communication opposite end, and encapsulation, route also forwarding send to the data message that terminal or terminal are sent.
In the architecture network of Fig. 1, when if ASN receives the data message that terminal MN sends, according to the AID-RID mapping table in the AIDc of destination address Correspondent Node CN in the data message inquiry local cache: find corresponding AIDc-RIDc map entry, RIDc is encapsulated in header as destination address, the RIDm of MN source address AIDm correspondence is encapsulated in header as source address, and is forwarded to the broad sense Forwarding plane; If do not find corresponding AIDc-RIDc map entry, be forwarded to the mapping Forwarding plane after data message is done tunnel encapsulation, and send the flow process of inquiry AIDc-RIDc mapping relations to the mapping Forwarding plane.
When ASN receives the data message of network destined terminal, the data message is carried out decapsulation handle, peel off the RID encapsulation of data message head, keep AID and mail to terminal as the data message head.
CR (Common Router, generic router): route and forwarding are the data message of source address/destination address with the RID form.The function of this generic router and router of the prior art are as broad as long.
ILR (Identity Location Register/Packet Transfer Function, identity location register), therefore user's AID-RID mapping relations in this architecture network of maintenance/preservation also are mapping server.Realize registering function, handle the position enquiring flow process of Correspondent Node.Broke ILR is mainly used in when no direct connection concerns between visit ILR and the ownership ILR, the signaling between the transfer ILR.
PTF is the packet forward function.The mapping Forwarding plane is also transmitted according to purpose AID route in the mapping Forwarding plane by PTF after receiving the data message that ASN sends to.The PTF node is after the mapping relations of finding purpose AID-RID in the mapping Forwarding plane, in the corresponding RID information of data message head encapsulation and be forwarded to the broad sense Forwarding plane, by broad sense Forwarding plane route and be forwarded to Correspondent Node.
Authentication center: authentication center is responsible for the user property of minute book architecture network; comprise information such as class of subscriber, authentication information, user's grade of service; generation is used for the user security information of authentication, integrity protection and encryption, carries out access control and mandate when the user inserts.Authentication center's support terminal and internetwork bi-directional authentification.
In based on identity position separation architecture, terminal use's identify label AID remains constant.Station location marker RID represents the ASN position at current terminal place.During terminal use's access network, by the authenticity of authentication center's authentication assurance identify label, mapping server has been preserved the AID-RID mapping relations of each node.Access Network is partly distinguished different nodes and is adopted identify label AID, and the broad sense exchange plane adopts RID route data message, and setting up end to end, communication process all needs to search corresponding customer location sign RID with identify label AID.
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Address mapping method of the present invention realizes that based on the identity locator separation network described access service node is provided with address mapping table commonly used, comprising the identify label commonly used and the mapping relations of station location marker,
The AID-RID mapping table commonly used of access service node writes from configuration file when the access service node is switched on, and needs to upgrade in access service node running, and the mode of renewal is as follows:
Mapping server is all access service node broadcasts AID-RID mapping table commonly used in network regularly, and the access service node receives that the back upgrades the AID-RID mapping table commonly used of oneself.
In the AID-RID mapping table of the buffering area of access service node,, can be increased in the AID-RID mapping table commonly used of access service node if some clauses and subclauses frequency of utilization is higher.
Address mapping method of the present invention comprises:
201: described access service node receiving data packets, comprising the purpose identify label;
202: described access service node is inquired about described address mapping table commonly used according to the purpose identify label in the data message;
203: if inquire corresponding destination locations sign in described address mapping table commonly used, then described access service node is transmitted described data message according to described destination locations sign; Otherwise carry out data message forwarding alternately with mapping server.
In general, the access service node has the function of buffer memory learned addresses mapping table, in the end-to-end communication process, the identify label AID of local terminal need be carried to Correspondent Node as source address in data message.The access service node of Correspondent Node can obtain the identify label of source end and the mapping relations of station location marker from the source address that data message carries, also can obtain the identify label of destination and the mapping relations of station location marker according to the feedback of mapping server, this process is called address learning, and the AID-RID mapping relations of acquiring remain in the local buffer of opposite end access service node.
Before mutual with mapping server, address mapping table commonly used of inquiry earlier and buffer address mapping table help reducing the mutual of access service node and mapping server, can adopt following two kinds of orders:
1, before the access service querying node address mapping table commonly used, the address mapping table of learning in the inquiry local cache if do not find described destination locations sign, is inquired about described address mapping table commonly used more earlier.
When 2, the access service node does not inquire corresponding destination locations sign in described address mapping table commonly used, inquire about the address mapping table of learning in the local cache earlier, if do not find described destination locations sign, obtain described destination locations sign to described mapping server again.
Access service node and mapping server carry out message alternately to be transmitted, and following two kinds of implementations are arranged:
Mode one realizes based on framework shown in Figure 1, by the access service node message is transmitted to the mapping server that shines upon Forwarding plane, obtains purpose RID by this mapping server inquiry AID-RID mapping table again, has mapping server to realize the encapsulate forwarded of message again;
Mode two by the RID of access service node to mapping server acquisition request purpose AID correspondence, behind the mapping server inquiry AID-RID mapping table, is returned purpose RID to the access service node, is realized the encapsulate forwarded of message again by the access service node.
Embodiment one
Following access service node and mapping server carry out message pass-through mode two alternately and are example, in conjunction with Fig. 3 the specific embodiment of the invention are described, and this map addresses process may further comprise the steps:
Step 301: the access service node receives the data message that terminal use M sends, and wherein comprises the identify label AIDm of user M and to the identify label AIDn of end subscriber N;
Step 302: the access service node is searched the AID-RID mapping table in the buffering area, if the list item of AIDn is arranged, then the destination locations of finding is identified the destination address of RIDn as data message, data message is sent, otherwise execution in step 303;
Step 303: the access service node is searched AID-RID mapping table commonly used, if the list item of AIDn is arranged, then the destination locations of finding is identified the destination address of RIDn as data message, data message is sent, otherwise execution in step 304;
Step 304: the access service node removes to search the AID-RID mapping table of mapping server, then the destination locations of finding is identified the destination address of RIDn as data message, and data message is sent.
Correspondingly, if employing mode one, if the access service node is found corresponding AIDn-RIDn map entry in address mapping table commonly used or local cache, then RIDn is encapsulated in header as destination address, the RIDm of M source address AIDm correspondence is encapsulated in header as source address, and is forwarded to the broad sense Forwarding plane; Otherwise data message is done the mapping server that is forwarded to the mapping Forwarding plane after the tunnel encapsulation, after the mapping Forwarding plane inquires the mapping relations of AIDn-RIDn, in the corresponding RIDn information of data message head encapsulation and be forwarded to the broad sense Forwarding plane, by broad sense Forwarding plane route and be forwarded to Correspondent Node.
Embodiment two
For realizing that above access service node and mapping server carry out the mode one that message is transmitted alternately, the invention provides a kind of access service node, described access service node is arranged in the identity locator separation network, comprising:
The message receiver module is used for receiving data packets, comprising the purpose identify label;
The station location marker acquisition module, be connected with described message receiver module, be used for inquiring about described address mapping table commonly used or obtaining the destination locations sign of described purpose identify label correspondence, and notify described packet forwarding module from mapping server according to the purpose identify label of described data message;
Packet forwarding module is connected with described station location marker acquisition module, is used for the described data message of destination locations sign forwarding according to the purpose identify label correspondence of the data message that receives;
Address mapping table commonly used is connected with described station location marker acquisition module, is used to preserve address mapping relation commonly used.
Described address mapping table commonly used is a system configuration.
The mapping relations maintenance module is connected with described address mapping table commonly used, is used for upgrading described address mapping table commonly used according to the address mapping relation commonly used of mapping server broadcasting.
The mapping relations cache module, be connected with the station location marker acquisition module, be used to learn and the mapping relations of destination locations sign that the described station location marker acquisition module of buffer memory obtains from mapping server and corresponding purpose identify label, and learn the identify label of source end in the data cached message also and the mapping relations of station location marker; Described station location marker acquisition module is before described mapping server obtains described destination locations sign, and described mapping relations cache module of inquiry and address mapping table commonly used when all not inquiring corresponding destination locations sign, are obtained to described mapping server more earlier.
Embodiment three
For realizing that above access service node and mapping server carry out the mode two that message is transmitted alternately, the invention provides a kind of access service node, described access service node is arranged in identity locator separation network shown in Figure 1, comprising:
The message receiver module is used for receiving data packets, comprising the purpose identify label;
Local position sign enquiry module is connected with described message receiver module, is used for inquiring about described address mapping table commonly used according to the purpose identify label of described data message, and notifies described packet forwarding module;
Packet forwarding module, be connected with described local position sign enquiry module, be used for transmitting described data message: when obtaining the destination locations sign according to the Query Result of described local position sign enquiry module, according to the described data message of described destination locations sign routing forwarding, otherwise with described data message forwarding to mapping server;
Address mapping table commonly used is connected with described local position sign enquiry module, is used to preserve address mapping relation commonly used.
The mapping relations maintenance module is connected with described address mapping table commonly used, is used for upgrading described address mapping table commonly used according to the address mapping relation commonly used of mapping server broadcasting.
The mapping relations cache module is connected with local position sign enquiry module, is used for learning and the identify label of data cached message source end and the mapping relations of station location marker; Before described local position sign enquiry module notifies described packet forwarding module to transmit data message, the described mapping relations cache module of inquiry reaches address mapping table commonly used earlier, when all not inquiring corresponding destination locations sign, reinform described packet forwarding module and transmit data message.
Address mapping method of the present invention and access service node configuration are used address mapping table always, the access service node is after receiving the packet that terminal sends, if the purpose identify label of packet can be found in this table, then just can find the destination locations sign of packet in this locality, and need not the mapping server inquiry, thereby reduce the data traffic between access service node and the mapping server.
Claims (12)
1. an address mapping method is characterized in that, this method realizes that based on the identity locator separation network described access service node is provided with address mapping table commonly used, comprising the identify label commonly used and the mapping relations of station location marker; This method comprises:
Described access service node receiving data packets is comprising the purpose identify label;
Described access service node is inquired about described address mapping table commonly used according to the purpose identify label in the data message;
If inquire corresponding destination locations sign in described address mapping table commonly used, then described access service node is transmitted described data message according to described destination locations sign; Otherwise carry out data message forwarding alternately with mapping server.
2. the method for claim 1, it is characterized in that: described address mapping table commonly used is a system configuration, or according to the broadcasting regular update of mapping server.
3. the method for claim 1 is characterized in that: before the described access service querying node address mapping table commonly used, inquire about the address mapping table of learning in the local cache earlier, if find described destination locations sign, inquire about described address mapping table commonly used again.
4. the method for claim 1, it is characterized in that: when described access service node does not inquire corresponding destination locations sign in described address mapping table commonly used, inquire about the address mapping table of learning in the local cache earlier, if do not find described destination locations sign, obtain described destination locations sign to described mapping server again.
5. the method for claim 1, it is characterized in that: the process that described access service node and mapping server carry out data message forwarding alternately realizes in the following manner:
Described access service node is transmitted to message the mapping server of mapping Forwarding plane; This mapping server inquire address mapping table obtains the encapsulate forwarded that data message is realized in destination locations sign back; Or,
Described access service node is to the station location marker of mapping server acquisition request purpose identify label correspondence; Behind the mapping server inquire address mapping table, return described destination locations sign to described access service node; Described access service node is realized the encapsulate forwarded of data message according to the destination locations sign of obtaining.
6. an access service node is characterized in that, described access service node is arranged in the identity locator separation network, comprising:
The message receiver module is used for receiving data packets, comprising the purpose identify label;
The station location marker acquisition module, be connected with described message receiver module, be used for inquiring about described address mapping table commonly used or obtaining the destination locations sign of described purpose identify label correspondence, and notify described packet forwarding module from mapping server according to the purpose identify label of described data message;
Packet forwarding module is connected with described station location marker acquisition module, is used for the described data message of destination locations sign forwarding according to the purpose identify label correspondence of the data message that receives;
Address mapping table commonly used is connected with described station location marker acquisition module, is used to preserve address mapping relation commonly used.
7. access service node as claimed in claim 6 is characterized in that: described address mapping table commonly used is a system configuration.
8. access service node as claimed in claim 6, it is characterized in that: described access service node also comprises the mapping relations maintenance module that is connected with described address mapping table commonly used, and described mapping relations maintenance module is used for upgrading described address mapping table commonly used according to the address mapping relation commonly used of mapping server broadcasting.
9. access service node as claimed in claim 6, it is characterized in that: described access service node also comprises the mapping relations cache module that is connected with the station location marker acquisition module, be used to learn and the mapping relations of destination locations sign that the described station location marker acquisition module of buffer memory obtains from mapping server and corresponding purpose identify label, and learn the identify label of source end in the data cached message also and the mapping relations of station location marker; Described station location marker acquisition module is before described mapping server obtains described destination locations sign, and described mapping relations cache module of inquiry and address mapping table commonly used when all not inquiring corresponding destination locations sign, are obtained to described mapping server more earlier.
10. an access service node is characterized in that, described access service node is arranged in the identity locator separation network, comprising:
The message receiver module is used for receiving data packets, comprising the purpose identify label;
Local position sign enquiry module is connected with described message receiver module, is used for inquiring about described address mapping table commonly used according to the purpose identify label of described data message, and notifies described packet forwarding module;
Packet forwarding module, be connected with described local position sign enquiry module, be used for transmitting described data message: when obtaining the destination locations sign according to the Query Result of described local position sign enquiry module, according to the described data message of described destination locations sign routing forwarding, otherwise with described data message forwarding to mapping server;
Address mapping table commonly used is connected with described local position sign enquiry module, is used to preserve address mapping relation commonly used.
11. access service node as claimed in claim 10, it is characterized in that: described access service node also comprises the mapping relations maintenance module that is connected with described address mapping table commonly used, described mapping relations maintenance module is used for upgrading described address mapping table commonly used according to the address mapping relation commonly used of mapping server broadcasting.
12. access service node as claimed in claim 10, it is characterized in that: described access service node also comprises the mapping relations cache module that is connected with local position sign enquiry module, is used for learning and the identify label of data cached message source end and the mapping relations of station location marker; Before described local position sign enquiry module notifies described packet forwarding module to transmit data message, the described mapping relations cache module of inquiry reaches address mapping table commonly used earlier, when all not inquiring corresponding destination locations sign, reinform described packet forwarding module and transmit data message.
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| CN2009102527526A CN102098349A (en) | 2009-12-09 | 2009-12-09 | Address mapping method and access service node |
| PCT/CN2010/078568 WO2011069399A1 (en) | 2009-12-09 | 2010-11-09 | Address mapping method and access service node |
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| CN2009102527526A CN102098349A (en) | 2009-12-09 | 2009-12-09 | Address mapping method and access service node |
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