CN101854692B - Subnet access method based on identity-position separate mapping mechanism - Google Patents
Subnet access method based on identity-position separate mapping mechanism Download PDFInfo
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- CN101854692B CN101854692B CN201010173710.6A CN201010173710A CN101854692B CN 101854692 B CN101854692 B CN 101854692B CN 201010173710 A CN201010173710 A CN 201010173710A CN 101854692 B CN101854692 B CN 101854692B
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Abstract
The invention belongs to the technical field of network communication, particularly relates to a subnet access method based on an identity-position separate mapping mechanism. The method is used for accessing a terminal into a virtual tree network structure comprising a switch router and a subnet router to realize a micromotion protocol. The method comprises the steps of: establishing the virtual tree network structure in a default route mode; setting the route mode of the subnet router into a host route mode and setting the route mode for accessing the switch router into a policy route mode; and accessing the terminal into the subnet router. By the identity-position separate mapping mechanism, the invention realizes the micromotion protocol, solves the extensible problem of a network route, reduces the switching delay of the terminal among networks, overcomes obstacles existing when a heterogeneous terminal is accessed into a network, and avoids the generation of triangular route.
Description
Technical field
The invention belongs to network communications technology field, relate in particular to a kind of subnet access method based on identity and position separate mapping mechanism.
Background technology
After entering into the 21st century of information technology develop rapidly, people are increasingly high to the demand of the communication technology, network technology, and the Internet has become an indispensable part in people's work and the life, and become the enormous motivation that promotes social progress.In recent years, internet scale enlarges rapidly, and number of users is advanced by leaps and bounds.Yet the Internet is born three during the last ten years, and people to the demand of the Internet significant variation have taken place, and this causes some original design defectives of the Internet to display gradually.Mobility tenability difference is exactly a huge bottleneck of traditional internet development.
Discover that the double attribute of IP address on semantics in the Internet protocol system is one of basic reason that causes problems.In the conventional internet protocol system, the IP address is the identity information of representation node both, the also positional information of representation node, but the double attribute of IP address has caused the serious route scaling problem in the Internet, makes the Internet be difficult to support to move and functions such as many locals.
The present invention proposes the thought of a kind of identity and position separate mapping mechanism, is that the identity information with the IP address in traditional the Internet separates with this dual nature of positional information.Network no longer requires the terminal to move the back and uses new address access network, and unique just enjoy network service anywhere of access sign is used at the terminal.This new network architecture with good mobility, fail safe and credibility also inserts to subnet and proposes research.
Introduce the access at the polytype terminal of support that subnet can be more convenient; Not only for the IP terminal; Can also support the terminal of mobile radio communication, for example each Terminal Type of 3G (3rd-generation), WiMAX networks such as (Worldwide Interoperability for Microwave Access).
Simultaneously, the introducing that inserts subnet makes that moving of terminal no longer is to move through the grand of core net, and moving in the subnet promptly becomes little moving.Grandly move frequent switching meeting and send various management control messages to network, little move not only can reduce grandly move the management control messages that brings, and moving in subnet need not pass through core net again, significantly reduced handover delay.At present little mobile having become studied focus in the industry; The famous company of each colleges and universities and communication industry has all proposed to oneself little mobility protocol in the territory; Main frame as being proposed by Ericsson and Columbia University moves scheme CellularIP, the wireless network HAWAII that moves in the support region that is proposed by LucentTechnologies etc.
In view of the subnet access scheme that does not also have at present perfect identity and position separating mechanism, existing subnet research basically all is based on mobile IP and is used as its macro-mobility.An important starting point for inserting the subnet design is considered ambulant design exactly, i.e. little mobile design under existing macro-mobility.Present little mobility protocol all is grand mobile for moving the research of being done under the IP.
In order to support mobility, internet engineering task group (IETF, Internet EngineeringTask Force) has proposed a series of mobility supported protocols, comprises mobile IPv 4 (Mobile IPv4) and mobile IP v 6 (Mobile IPv6).MIPv4 and MIPv6 are the representative protocol of network layer mobile management mechanism, and part has solved the communication persistent problem of portable terminal in moving process.
Little mobility protocol is moving in switching frequent zonule.Little mobility protocol of IP and mobile IP form complementation, so that quick seamless switching strategy to be provided.Typical little mobility protocol comprises: IP (HMIP) and TeleMIP (Telecommunication EnhancedMobile IP) are moved in cellular ip (CellularIP), HAWAII, layering, and they all are the remarkable examples in the little mobility protocol of IP.
Cellular IP is by Columbia University and the support paging of Ericsson's proposition and little mobility protocol of a series of handover mechanisms.Cellular IP is made up of base station (BS) and Cellular IP gateway (Gateway) two large divisions, and agreement is based upon on the basis of IP packet forward.Between the Cellular IP gateway, the overall mobility of network supported by Mobile IP agreement, and inner at the Cellular IP gateway, adopts the mobile management of cellular mobile system and the local mobility that handoff functionality comes network enabled.
The handover optimization wireless Internet structure (HAWAII) that Lucent Technologies proposes, different with Cellular IP, HAWAII is substitute I P but be operated on the IP not.Particular path changes among the agency before creating a mechanism and being used for being installed to the main frame route entry between routing table or the portable terminal and the root area router of router, thereby supports local moving.
The registration process that a kind of different algorithms of IP (HMIP) employing is handled mobile IP is moved in layering by Ericsson and Nokia propose.Hierarchical Mobile IP is the far-end HA registration problem that the people such as former designer Charles E.Perkins by Mobile IP are suffered from order to improve Mobile IP, and supports IP to notify from a phone call, and the little mobility protocol that proposes.
Hierarchical Mobile IP is to supporting the expansion of the mobile IP of Foreign Agent classification between MN and HA.Moving the tree-shaped hierarchy type management domain pattern that has adopted the multilayer foreign agent FA to constitute on the IP basis.Because HMIP adopts the route point layering of single level to reduce the number of mobile management node in the network, compares the mobility protocol that other aim at the mobility routing Design, produces higher handover delay.
To sum up can know; Cellular ip (Cellular IP), HAWAII, layering are moved IP (HMIP) and are the agreement based on MobileIP; Perfect not enough, the two-way packets need process subnet summit router of communication mechanism between the terminal does not have the special routing plan of optimizing to this in the subnet.
Be different from Mobile IP based on terminal access scheme in the subnet of identity and position separating mechanism, do not have the distribution of CoA (anti-counterfeit certificate), the terminal is inserted and need not to register to HA; Also need not bind with FA; Need not set up and be similar to the equipment that moves home agent among the IP, need not introduce tunneling mechanism, packet send when receiving needn't process of passing through tunnel the encapsulation decapsulation; The notion that does not have the local router; Do not have the triangle routing issue, and the subnet scheme adopts is the mode of routing-based, effectively reduce the terminal and move time delay and packet loss problem in the handoff procedure.
Summary of the invention
The present invention is directed to present communication network in the deficiency that exists aspect the support mobility terminal, propose a kind of subnet access method based on identity and position separate mapping mechanism.
Technical scheme is; A kind of subnet access method based on identity and position separate mapping mechanism; Be used for just that the terminal is linked into the virtual tree mesh network structure that comprises TSR and subnet router, realize little mobility protocol, it is characterized in that said method comprises the following steps:
--set up virtual tree mesh network structure through the default route mode;
--the routing mode of subnet router is set to the main frame routing mode, and the routing mode that inserts TSR is set to tactful routing mode;
--subnet router is inserted at the terminal.
Saidly set up virtual tree mesh network structure through the default route mode and specifically be, with the leaf node of the subnet router in each subnet, for it is provided with default gateway as the tree network structure; Said default gateway is the upper level subnet router of subnet router or inserts TSR; With the root node of said access TSR as the tree network structure.
The routing mode of said subnet router is set to the main frame routing mode; The network prefix length of subnet router route is set to the length of the access sign at terminal; Receive the access message or updating message of transmission of portable terminal or next stage subnet router when subnet router after, it is forwarded to the upper level subnet router or inserts TSR; Receive the affirmation message of the transmission that inserts exchange route or upper level subnet router when subnet router after, it is forwarded to the next stage subnet router.
The said routing mode that inserts TSR is set to tactful routing mode; Insert TSR and a default route is set for each network interface card interface; Be used to connect this network interface card interface and subnet router; And set up tactful routing table, write down the corresponding relation between network interface card interface and the subnet router.
Said with the terminal insert subnet router specifically comprise the terminal first access network, terminal move between the subnet under the same access TSR mobile between different access TSRs subnets down with the terminal.
Said terminal access network first comprises the following steps:
Step 11: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal;
Step 12: subnet router is set up one by the main frame route of said terminal to this subnet router after receiving and inserting message; And the access at said terminal sign and this main frame route added in the routing table of subnet router self, then upwards the primary subnet router sends said access message;
Step 13: after the upper level subnet router is received and inserted message, judge whether self is to insert TSR, if execution in step 14 then; Otherwise, repeating step 12;
Step 14: inserting TSR is said terminal distribution exchange Route Distinguisher; And the access sign in the access message that said exchange Route Distinguisher and said terminal are sent is made into one group of mapping relations; Said mapping relations and said terminal are write the mapping relations table to the main frame route that inserts TSR, and deposit in the mapping server database;
Step 15: insert TSR and oppositely return acknowledge message to said terminal along the main frame route of setting up, the notice terminal is access network smoothly.
Said terminal is moved between the subnet under the same access TSR and is comprised the following steps:
Step 21: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal;
Step 22: judge whether self is crossover router, if then execution in step 24; Otherwise, execution in step 23;
Step 23: subnet router is that said terminal is set up one by the main frame route of terminal to this subnet router; And in the routing table with the access at said terminal sign and said main frame route adding subnet router self; Then will insert message and be sent to the upper level subnet router, return step 22;
Step 24: judge whether self is to insert TSR, if, execution in step 26; Otherwise, execution in step 25;
Step 25: subnet router is that said terminal is set up one by the main frame route of terminal to this subnet router; Replace in the routing table simultaneously; Original in the main frame route of terminal to this subnet router, and upwards the primary subnet router sends updating message, returns step 24;
Step 26: more new terminal is to the main frame route that inserts TSR, and the terminal after will upgrading writes the mapping relations table to main frame route and original mapping relations of access TSR, upgrades the mapping server database simultaneously; Arrive the rightabout of the main frame route that inserts TSR along original terminal; The primary subnet router sends acknowledge message downwards; Terminal access sign in the routing table of deletion next stage subnet router self and terminal are to the main frame route of next stage subnet router, until the terminal.
Said terminal is inserted to move between the subnet under the TSR in difference and is comprised the following steps:
Step 31: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal;
Step 32: subnet router is that the terminal increases by one by the main frame route of said terminal to this subnet router; And the access at terminal sign and this main frame route added in the routing table of subnet router self, then upwards the primary subnet router sends said access message;
Step 33: after the upper level subnet router is received and inserted message, judge whether self is to insert TSR, if execution in step 34 then; Otherwise, repeating step 32;
Step 34: inserting TSR is said terminal distribution exchange Route Distinguisher; And the access sign in the access message that said exchange Route Distinguisher and said terminal are sent is made into one group of mapping relations; Said mapping relations and said terminal are write the mapping relations table to the main frame route that inserts TSR, and deposit in the mapping server database;
Step 35: according to the mapping relations of preserving in the mapping server database, find the original affiliated access TSR in terminal, and send the terminal mobile messaging to it;
Step 36: the access TSR under the terminal is original upgrades original mapping relations; And along the main frame route of original foundation; The primary subnet router sends the terminal mobile messaging downwards; Terminal access sign in the routing table of deletion next stage subnet router self and terminal are to the main frame route of next stage subnet router, till the afterbody subnet router;
Step 37: the main frame route along setting up is oppositely returned acknowledge message to said terminal, and the notice terminal is access network smoothly.
Said subnet router is also moved dynamic routing protocol.
Said terminal is a kind of in common desktop computer, personal digital assistant, Worn type computer, notebook computer, smart phone or the portable terminal of supporting 3G/WiMAX.
Effect of the present invention is; Realize little mobility protocol through identity and position separate mapping mechanism, but solved the scaling problem of network route, reduced terminal time delay for switching between network; The obstacle that has faced when having overcome isomery type terminals access network has been avoided the generation of triangle route.
Description of drawings
Fig. 1 is the subnet access method flow chart based on identity and position separate mapping mechanism provided by the invention;
Fig. 2 is the terminal method flow diagram of the present invention under the access network situation first;
Fig. 3 is that sketch map is switched at the terminal between Intranet;
Fig. 4 is the of the present invention method flow diagram of terminal under switch instances between Intranet;
Fig. 5 is that sketch map is switched at the terminal between outer net;
Fig. 6 is the of the present invention method flow diagram of terminal under switch instances between outer net.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit scope of the present invention and application thereof.
Comprised in the network topology that polytype subnet inserts, and also has polytype terminal equipment.This diversified multi-type network meets network configuration in the reality, and some terminal or two-layer equipment are the access TSRs that can directly insert under separation and the map architecture option, have avoided three layers data processing like this.Packet can go directly the access TSR and need not the multi-hop route.But, under some complex situations, must introduce this three-layer equipment of router, reached the purpose of UNE isomery and enlargement network range.So invention contains the infrastructure network that this structure of multilayer router is regarded as inventing with subnet, other subnet that comprises switch, AP (Access Point, WAP) or direct-connected terminal is the special circumstances of invention in fact.
Fig. 1 is the subnet access method flow chart based on identity and position separate mapping mechanism provided by the invention.Among Fig. 1, implementation procedure of the present invention is:
Step 1: set up virtual tree mesh network structure through the default route mode.
Virtual tree network structure is a kind of structure in logic, and the subnet that the present invention designed can be netted physically, but through for the router in each subnet is provided with default gateway network being developed into a kind of tree topology in itself.The default gateway here is exactly the upper level router of this router in fact; As long as the default gateway that can successively make progress for each configuration of routers at last; And all-router can both be linked under the common access TSR, just can form virtual tree network structure.In practical operation, with the leaf node of the subnet router in each subnet as the tree network structure, for it is provided with default gateway, default gateway is the upper level subnet router of subnet router or inserts TSR; With inserting the root node of TSR as the tree network structure.
Step 2: the routing mode of subnet router is set to the main frame routing mode, and the routing mode that inserts TSR is set to tactful routing mode.
The routing mode of subnet router is set to the main frame routing mode; The network prefix length of subnet router route is set to the length of the access sign at terminal; Receive the access message or updating message of transmission of portable terminal or next stage subnet router when subnet router after, it is forwarded to the upper level subnet router or inserts TSR; Receive the affirmation message of the transmission that inserts exchange route or upper level subnet router when subnet router after, it is forwarded to the next stage subnet router.
The routing mode that inserts TSR is set to tactful routing mode and specifically is; Insert TSR and a default route is set for each network interface card interface; Be used to connect this network interface card interface and subnet router; And set up tactful routing table, write down the corresponding relation between network interface card interface and the subnet router.
Step 3: subnet router is inserted at the terminal.
In the present invention, router also moves dynamic routing protocol in the subnet.Insert TSR except the operation dynamic routing protocol, outside identity and the position separating shadowing agreement, the little mobility protocol that also moves the present invention and realized.The terminal is a kind of in the portable terminal of common desktop computer, personal digital assistant, Worn type computer, notebook computer, smart phone, support 3G or WiMAX.
In the present invention, subnet router is inserted at the terminal has three kinds of situation, and (1) terminal is access network first, and move between the subnets under the different access TSRs with (3) terminal mobile between the subnet under the same access TSR at (2) terminal.In order to make implementation procedure of the present invention clearer, the different situations during to accessing terminal to network describe respectively with embodiment respectively below.
First kind of situation:
Fig. 2 is the terminal method flow diagram of the present invention under the access network situation first.Setting up virtual tree mesh network structure through the default route mode; And after the routing mode of the subnet router routing mode that is set to the main frame routing mode and inserts TSR is set to tactful routing mode; In Fig. 2, a process that never gets into the accessing terminal to network of present networks is:
Step 11: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal.
Step 12: subnet router is set up one by the main frame route of said terminal to this subnet router after receiving and inserting message; And the access at said terminal sign and this main frame route added in the routing table of subnet router self, then upwards the primary subnet router sends said access message.
Step 13: after the upper level subnet router is received and inserted message, judge whether self is to insert TSR, if then execution in step 14; Otherwise, repeating step 12.
Step 14: inserting TSR is said terminal distribution exchange Route Distinguisher; And the access sign in the access message that said exchange Route Distinguisher and said terminal are sent is made into one group of mapping relations; Said mapping relations and said terminal are write the mapping relations table to the main frame route that inserts TSR, and deposit in the mapping server database.
Step 15: insert TSR and oppositely return acknowledge message to said terminal along the main frame route of setting up, the notice terminal is smoothly behind the access network, said method end.
Second kind of situation:
Fig. 3 is that sketch map is switched at the terminal between Intranet.Among Fig. 3, switching specifically is meant between Intranet, and the access TSR that the terminal upwards finally reaches along subnet router still is the same access TSR before switch at the terminal.The terminal of original access network moves to subnet router 6 from subnet router 4, its process such as Fig. 4.Access is again switched at the terminal in the subnet of tree network structure, will inevitably be formed into the new route at terminal.The terminal is so long as when moving in the subnet under same access TSR, this new route will with old paths intersect, form a crosspoint.This crosspoint is called as crossover router, like the subnet router among Fig. 31.Existing old route (subnet router 4-subnet router 2-subnet router 1) to the terminal has the new route (subnet router 6-subnet router 3-subnet router 1) to the terminal again above it.Crossover router possibly be the subnet router that is in minimum one deck, also possibly be to be positioned at top access TSR, decides according to the span of terminal moving range.The mobile distribution that does not relate to mapping relations in the subnet just must be made renewal to the route of incoming terminal, comprises and sets up main frame route on the new route, deletes the old route on the old path.
Fig. 4 is the of the present invention method flow diagram of terminal under switch instances between Intranet; Setting up virtual tree mesh network structure through the default route mode; And after the routing mode of the subnet router routing mode that is set to the main frame routing mode and inserts TSR is set to tactful routing mode; Among Fig. 4, the procedure of terminal under switch instances between Intranet is:
Step 21: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal.
Step 22: after subnet router is received and inserted message,, judge whether self is crossover router through whether the access sign at said terminal is arranged in the routing table of checking self, if then execution in step 24, otherwise, execution in step 23.See the subnet router 6 among Fig. 3, when subnet router 6 is inserted at the terminal, because this router is not a crossover router, so execution in step 23.
Step 23: subnet router is that the terminal is set up one by the main frame route (terminal-subnet router 6) of terminal to this subnet router; And in the routing table with the access at said terminal sign and said main frame route adding subnet router self; Then will insert message and be sent to upper level subnet router (subnet router 3), return step 22.
After returning step 22, upper level subnet router (subnet router 3) judges whether self is crossover router.Obviously subnet router 3 neither crossover router; Subnet router 3 is set up one by the main frame route (terminal-subnet router 6-subnet router 3) of terminal to this subnet router for the terminal; And in the routing table with the access at said terminal sign and said main frame route adding subnet router self; Then will insert message and be sent to upper level subnet router (subnet router 1), return step 22.
After upper level subnet router (subnet router 1) is received access message, because the access sign at original terminal is arranged in its routing table, so its judgement oneself is a crossover router, execution in step 24.
Step 24: judge whether self is to insert TSR, if then execution in step 26; Otherwise, execution in step 25.
Because subnet router 1 is not to get involved TSR, so execution in step 25.
Step 25: subnet router (subnet router 1) is set up one by the main frame route (terminal-subnet router 6-subnet router 3-subnet router 1) of terminal to this subnet router for the terminal; Replace in the routing table simultaneously; It is original that (original main frame route is: terminal-subnet router 4-subnet router 2-subnet router 1) to the main frame route of this subnet router by the terminal; Then upwards the primary subnet router sends updating message, and returns step 24.
Among Fig. 3, the upper level subnet router of subnet router 1 is the access TSR, so execution in step 26.
Step 26: upgrade from the terminal to the main frame route that inserts TSR and (insert TSR by original terminal-subnet router 4-subnet router 2-subnet router 1-; Be updated to: terminal-subnet router 6-subnet router 3-subnet router 1-inserts TSR); And the terminal after will upgrading writes the mapping relations table to the main frame route and the original mapping relations that insert TSR, upgrades the mapping server database simultaneously.Opposite direction along original terminal to the main frame route that inserts TSR (inserting TSR-subnet router 1-subnet router 2-subnet router 4-terminal); The primary subnet router sends acknowledge message downwards; Terminal access sign in the routing table of deletion next stage subnet router self and terminal are to the main frame route of next stage subnet router, until the terminal.Such as in the routing table of subnet router 2, delete the access sign at this terminal and the main frame route (terminal-subnet router 4-subnet router 2) that subnet router 2 is arrived at the terminal.Subnet router 4 also in this way.
The third situation:
Fig. 5 is the different mobile sketch mapes between subnet under the TSR that insert.Setting up virtual tree mesh network structure through the default route mode; And after the routing mode of the subnet router routing mode that is set to the main frame routing mode and inserts TSR is set to tactful routing mode; Have wireless network card or be connected with the subnet router fixed time broadcast network notifications message of WAP; Whether portable terminal constantly receives network notifications message, and detect self in view of the above and be moved.Finding that terminal self has moved to new following time of subnet router, needing to initiate to switch.Fig. 6 is the different mobile sketch mapes between subnet under the TSR that insert.Among Fig. 6, the terminal is inserted to move between the subnet under the TSR in difference and is comprised the following steps:
Step 31: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal.
Step 32: subnet router is that the terminal increases by one by the main frame route of said terminal to this subnet router; And the access at terminal sign and this main frame route added in the routing table of subnet router self, then upwards the primary subnet router sends said access message.
In Fig. 5, when the terminal formula that is moved, with the main note route that increases terminal-subnet router 9.
Step 33: after the upper level subnet router is received and inserted message, judge whether self is to insert TSR, if execution in step 34 then; Otherwise, repeating step 32.
In Fig. 5; After the upper level subnet road of subnet router 9 device (subnet router 8) is received access message; Judge it self is not to insert TSR; Then repeating step 32, and promptly subnet router 8 increases by one by the main frame route (terminal-subnet router 9-subnet router 8) of said terminal to this subnet router for the terminal; And the access at terminal sign and this main frame route added in the routing table of subnet router 8 self, then upwards primary subnet router (subnet router 7) sends said access message.
After subnet router 7 receives to insert message, judge it self is not to insert TSR, then repeating step 32.
After access TSR 2 is received access message, execution in step 34.
Step 34: insert TSR 2 and be said terminal distribution exchange Route Distinguisher (the main note route of this moment is: terminal-subnet router 9-subnet router 8-subnet router 7-inserts TSR 2); And the access sign in the access message that said exchange Route Distinguisher and said terminal are sent is made into one group of mapping relations; Said mapping relations and said terminal are write the mapping relations table to the main frame route that inserts TSR, and deposit in the mapping server database.
Step 35: according to the mapping relations of preserving in the mapping server database, find the original affiliated access TSR in terminal (inserting TSR 1), and send the terminal mobile messaging to it.
Step 36: the access TSR under the terminal is original upgrades original mapping relations; And along the opposite direction (inserting TSR 1-subnet router 1-subnet router 2-subnet router 4) of the main frame route of original foundation; The primary subnet router sends the terminal mobile messaging downwards; Terminal access sign in the routing table of deletion next stage subnet router self and terminal are to the main frame route of next stage subnet router, till afterbody subnet router (subnet router 4).
Step 37: along the main frame route of setting up reverse (inserting TSR 2-subnet router 7-subnet router 8-subnet router 9-terminal), return acknowledge message to said terminal, the notice terminal is access network smoothly.
When the terminal is inserted between TSR subnet down after the switching in difference; If at first with this terminal communication, packet can be routed to by the access TSR under the Correspondent Node under the old access TSR (such as the access TSR 1 among Fig. 5) Correspondent Node.Old access TSR can be forwarded to portable terminal affiliated new access TSR (such as the access TSR 2 among Fig. 5) this moment with this packet; And then the access TSR under Correspondent Node sends the message of a notice opposite end; The up-to-date mapping relations in terminal have wherein been comprised; Tell its terminal to move away, be allowed to condition in the mapping table of opposite end mapping relations with portable terminal and be updated to up-to-dately that this is a kind of method of being avoided the triangle route.
The process and the mobility management mechanism that the present invention proposes virtual tree mesh network structure and insert the subnet route; Realized the little mobility protocol under separation and the mapping mechanism; But solved the route scaling problem of core net effectively, reduced the terminal simultaneously and moved time delay and packet loss problem in the handoff procedure.This method has also been unified the identify label at heterogeneous network terminal, for the access control at heterogeneous network terminal provides the basis.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. the subnet access method based on identity and position separate mapping mechanism is used for the terminal is linked into the virtual tree mesh network structure that comprises TSR and subnet router, realizes little mobility protocol, it is characterized in that said method comprises the following steps:
--set up virtual tree mesh network structure through the default route mode; Specifically be, with the leaf node of the subnet router in each subnet, for it is provided with default gateway as the tree network structure; Said default gateway is the upper level subnet router of subnet router or inserts TSR; With the root node of said access TSR as the tree network structure;
--the routing mode of subnet router is set to the main frame routing mode, and the routing mode that inserts TSR is set to tactful routing mode;
Wherein, The routing mode of said subnet router is set to the main frame routing mode; The network prefix length of subnet router route is set to the length of the access sign at terminal; Receive the access message or updating message of transmission of portable terminal or next stage subnet router when subnet router after, it is forwarded to the upper level subnet router or inserts TSR; Receive the affirmation message of the transmission that inserts exchange route or upper level subnet router when subnet router after, it is forwarded to the next stage subnet router;
The said routing mode that inserts TSR is set to tactful routing mode; Insert TSR and a default route is set for each network interface card interface; Be used to connect this network interface card interface and subnet router; And set up tactful routing table, write down the corresponding relation between network interface card interface and the subnet router;
--subnet router is inserted at the terminal.
2. a kind of subnet access method according to claim 1 based on identity and position separate mapping mechanism, it is characterized in that said with the terminal insert subnet router specifically comprise the terminal first access network, terminal move between the subnet under the same access TSR mobile between different access TSRs subnets down with the terminal.
3. a kind of subnet access method according to claim 2 based on identity and position separate mapping mechanism, it is characterized in that said terminal first access network comprise the following steps:
Step 11: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal;
Step 12: subnet router is set up one by the main frame route of said terminal to this subnet router after receiving and inserting message; And the access at said terminal sign and this main frame route added in the routing table of subnet router self, then upwards the primary subnet router sends said access message;
Step 13: after the upper level subnet router is received and inserted message, judge whether self is to insert TSR, if execution in step 14 then; Otherwise, repeating step 12;
Step 14: inserting TSR is said terminal distribution exchange Route Distinguisher; And the access sign in the access message that said exchange Route Distinguisher and said terminal are sent is made into one group of mapping relations; Said mapping relations and said terminal are write the mapping relations table to the main frame route that inserts TSR, and deposit in the mapping server database;
Step 15: insert TSR and oppositely return acknowledge message to said terminal along the main frame route of setting up, the notice terminal is access network smoothly.
4. a kind of subnet access method based on identity and position separate mapping mechanism according to claim 2 is characterized in that said terminal mobile comprising the following steps: between the subnet under the same access TSR
Step 21: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal;
Step 22: judge whether self is crossover router, if then execution in step 24; Otherwise, execution in step 23;
Step 23: subnet router is that said terminal is set up one by the main frame route of terminal to this subnet router; And in the routing table with the access at said terminal sign and said main frame route adding subnet router self; Then will insert message and be sent to the upper level subnet router, return step 22;
Step 24: judge whether self is to insert TSR, if, execution in step 26; Otherwise, execution in step 25;
Step 25: subnet router is that said terminal is set up one by the main frame route of terminal to this subnet router; Replace in the routing table simultaneously; Original in the main frame route of terminal to this subnet router, and upwards the primary subnet router sends updating message, returns step 24;
Step 26: more new terminal is to the main frame route that inserts TSR, and the terminal after will upgrading writes the mapping relations table to main frame route and original mapping relations of access TSR, upgrades the mapping server database simultaneously; Arrive the rightabout of the main frame route that inserts TSR along original terminal; The primary subnet router sends acknowledge message downwards; Terminal access sign in the routing table of deletion next stage subnet router self and terminal are to the main frame route of next stage subnet router, until the terminal.
5. a kind of subnet access method based on identity and position separate mapping mechanism according to claim 2 is characterized in that said terminal mobile comprising the following steps: between the subnet under the difference access TSR
Step 31: the terminal is sent to the subnet router that inserts and is comprised the access message that sign is inserted at the terminal;
Step 32: subnet router is that the terminal increases by one by the main frame route of said terminal to this subnet router; And the access at terminal sign and this main frame route added in the routing table of subnet router self, then upwards the primary subnet router sends said access message;
Step 33: after the upper level subnet router is received and inserted message, judge whether self is to insert TSR, if execution in step 34 then; Otherwise, repeating step 32;
Step 34: inserting TSR is said terminal distribution exchange Route Distinguisher; And the access sign in the access message that said exchange Route Distinguisher and said terminal are sent is made into one group of mapping relations; Said mapping relations and said terminal are write the mapping relations table to the main frame route that inserts TSR, and deposit in the mapping server database;
Step 35: according to the mapping relations of preserving in the mapping server database, find the original affiliated access TSR in terminal, and send the terminal mobile messaging to it;
Step 36: the access TSR under the terminal is original upgrades original mapping relations; And along the main frame route of original foundation; The primary subnet router sends the terminal mobile messaging downwards; Terminal access sign in the routing table of deletion next stage subnet router self and terminal are to the main frame route of next stage subnet router, till the afterbody subnet router;
Step 37: the main frame route along setting up is oppositely returned acknowledge message to said terminal, and the notice terminal is access network smoothly.
6. according to claim 3,4 or 5 described a kind of subnet access methods, it is characterized in that said subnet router also moves dynamic routing protocol based on identity and position separate mapping mechanism.
7. according to claim 3,4 or 5 described a kind of subnet access methods, it is characterized in that said terminal is a kind of in common desktop computer, personal digital assistant, Worn type computer, notebook computer, smart phone or the portable terminal of supporting 3G/WiMAX based on identity and position separate mapping mechanism.
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| CN102868599B (en) * | 2011-07-08 | 2017-06-30 | 南京中兴新软件有限责任公司 | Identity and position separated protocol mobile node and control method for movement, mobile node |
| CN102868618A (en) * | 2011-07-08 | 2013-01-09 | 中兴通讯股份有限公司 | Detaching method, detaching device and mapping server |
| CN102984701B (en) * | 2011-09-07 | 2018-05-11 | 深圳迈辽技术转移中心有限公司 | The method and access point of identity net incremental deployment |
| CN103096342B (en) * | 2011-11-01 | 2017-11-07 | 中兴通讯股份有限公司 | One kind stream policy management method on the move and system |
| CN102843667B (en) * | 2012-09-17 | 2015-04-15 | 北京交通大学 | Method for deploying subnet mobile in separation mechanism mobility management system |
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| CN104734959B (en) * | 2013-12-19 | 2018-04-27 | 北京交通大学 | A kind of route and data transmission method based on tree network |
| CN108200624B (en) * | 2018-01-26 | 2020-12-15 | 北京博大光通物联科技股份有限公司 | LPWAN-based hybrid network networking communication method with automatic network access function |
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