CN1332583C - Moving management method for use between high anti-destroy distribution type user's network - Google Patents

Abstract

The present invention discloses a high anti-destroy distributed user internetwork mobile management method. The position of a user is updated and an inquiry method is changed by changing managemed mechanisms on the existing management entity. A home proxy of the present invention can automatically grow and synchronize according to the condition of a network and the situation of actual use, and can complete distributed user registration and inquiry of the user. A high anti-destroy and reliability communication network can be formed for realizing the communication requirements for some emergent occasions (such as the conditions of earthquakes, large-scale natural disasters, military applications, etc.) by the existing radio access network, such as 802.11 networks, by software programming to the management entity by the method of the present invention.

Description

Management method of mobile between a kind of distributed user network

Technical field

The invention belongs to the field of using communication in wireless the moving, as radio communication, Internet, personal communication, wireless self-organization networks etc., particularly those need provide support and need in the network configuration of integrated a plurality of heterogeneous networks of high survivability, reliability the mobile subscriber.

Background technology

As everyone knows, user's mobile management is that the mechanism of hinting obliquely at is provided when providing between sign (user name) the mobile subscriber and address (position of the relative network configuration of user) thereof, be that a kind of roamer of support arrives the basic fundamental that a new service area goes the service that receives, its major function is effectively to support the seamless roam of user and equipment in whole service network.It mainly is the location management that carries out the user, comprises addressing, position renewal, registration, inquiry, tracking and paging etc., to the effect that how to locate mobile node, follow the tracks of it move, upgrade positional information etc.

At present, realize that the method for mobile management between user network is a lot, mainly contain:

1. in gsm system, used HLR/VLR mechanism to carry out user's mobile management, whole service area is divided into lane place (LA), forever registers the user who belongs to it with HLR, registers those users in those networks that temporarily move to it with VLR.When the user enters a new lane place, if reposition district and original position district so just do not produce any update request to HLR, otherwise just carry out location update operations all by same VLR service.

2. in Internet, use mobile IP (MIP) to carry out mobile management in network layer.In mobile IP (MIP), each portable terminal has a permanent IP address that belongs to certain home network, and when it moved to field network, it obtained an interim Care-of Address (CoA).Each portable terminal all has a home agent (HA) come to be responsible for to follow the tracks of the existing CoA of this terminal in its home network inside, all must upgrade among the HA binding to this terminal when this terminal obtains a new CoA at every turn.To different IP versions (IPv4 and IPv6), the realization of MIP is slightly different.Introduce in detail and see RFCs2002-2006.Fig. 1 has provided its signal.

3. the application layer management method of mobile is met and is produced agreement (SIP), and it is grown up as real-time multimedia calling signaling agreement, can finish personal mobility, meet mobility and service mobility.Its main thought is when terminal moves to new position, produces new meeting again and connects and support mobility.The SIP supporting location upgrades and route reselection, but does not support to switch and paging.SIP has two kinds of mechanism, and one is based on the mechanism of Redirect Server, and two are based on the mechanism of acting server.Details is seen RFC2543.

Also there is multiple other way to manage in addition, as Cellular IP and HAWAII, MIP-RR, HMIPv6, TeleMIP, uMIP, IDMP etc., but these way to manages are mainly used in a subnet inside (in the territory), or it is different to be called the occasion that little mobile management and the present invention use.

Along with the development of mobile communication demand, a lot of special occasions need be carried out the radio communication of high reliability, and there are problems in use in original mobile management mode.What GSM used is centralized mobile management mode, will produce very big administration overhead when user mobility is big, causes congestedly easily in network, and reliability and survivability are all lower.And MIP also exists the position of several restrictions: HA must be positioned at the local net when using; The fragility of HA, it does not allow have the HA that disperses on other geography outside the home network; Triangle route and tunnel problem etc.Wherein preceding two problems have limited the stupid sustainability of network, and latter two problems is brought the reduction of performance, and have stoped interoperability.But SIP is fit to use in real time is not suitable for non real-time application, and the change that needs new transport layer protocol such as SCTP to deacclimatize Business Stream.Therefore need reliability that management method of mobile between a kind of new user network with high reliability and survivability improves it adaptively and survivability to satisfy the needs of communicating by letter of these specific demands.

Summary of the invention

The invention provides management method of mobile between a kind of distributed user net, it can use between a plurality of heterogeneous networks, adopts the present invention to carry out user's mobile management, can make network have very high survivability, reduces the updating cost and the time delay of customer location.

Management method of mobile between this distributed user net comprises: management system generation, distributed location update method and position query method is characterized in that:

Described management system generates the step below adopting:

1) user's mobile management agency's generation: the mobile subscriber adopts mobile management agency or home agent to manage when roaming.This system needs the formation logic home agent, is called for short LHA.Mobile subscriber in subnet of each LHA management, it can comprise the mobile management entity of one or more reality, and the user of different sub-network is managed by different LHA.The concrete generation method of management system is as follows.

1. the generation of master home agent (MHA): the user of each subnet is according to its address or the corresponding home network of homing position, each aforesaid network mobile management entity is as the master home agent (MHA) of the mobile subscriber in a certain subnet, also can do other user from home agent (SHA).

2. the generation of logic home agent (LHA): the automatic generation of user logic home agent is to realize according to the SHA that stability state, the survivability of network such as requires to serve as its leading subscriber at the management entity of other diverse location of request and quantity by MHA.We call MHA and these SHA this user's logic local mobile agent (LHA) together.When LHA has only a member, this mechanism just and the mechanism of common MIP compatible.

3. the information exchange after LHA sets up: will establish a communications link between the LHA member with exchange message, registering the back the user just is diffused into this user's information these SHA from MHA and goes, such user can register at a MHA and a plurality of SHA, different users can register in different LHA, operation when realizing a plurality of home agent.The member of each LHA links to each other by backbone network, transmits information mutually, and when the member of a LHA was damaged, the user can other member in same LHA locate registration or inquiry like this.

4. the foundation of MHA and home network corresponding relation: the corresponding same home network of the user under each MHA, MHA can be positioned at home network, but also can be positioned at outside the home network, but the router in the local network internal has the pointer that points to this MHA, revises this pointer and just can change pairing MHA.MHA regularly communicates by letter with home network with checking integrity each other simultaneously.

2) user's initial registration or registration: the user of initial network entry obtains a sign that belongs to it, corresponding home network of this sign and MHA, just can carry out initial registration or registration by this sign: the user sends to this MHA place registration with some essential informations of oneself by home network when initial network entry.This MHA to this user verify, activation and position upgrade, then among other SHA that user's information and current location is delivered to same LHA.MHA returns to the user together with LHA information.Can select LHA member's registration nearby during afterwards roam registration of user like this.

Solution when 3) damaging: the integrity of verifying each other of replying by regular information exchange between any two and synchronizing information between the LHA member at LHA member.When certain member can not receive another one member's information answer after a while, then specially to this member send one inquire after to determine it whether intact, if still can not receive replying then can confirming that it damages of this member.

The method that the damage of different members is handled: MHA will increase extra SHA replacement when a SHA damage; If MHA damage, at first the SHA of Fa Xianing will take over the function of former MHA and revise the pointer of user's home network simultaneously, the process processing when pressing SHA afterwards again and damaging.If home network damage, MHA can not receive the integrity information of home network after after a while, it just transmits request to the perimeter network issue of home network so, give them with user and the address notification of oneself that it is managed itself, all go to the inquiry of former home network to be blocked like this.

Need to prove:

Management system of the present invention is carried out on existing network management entity basis.Management entity is meant the management organization that those provide mobile management to support for the user, as router, information management system etc.They are positioned at the Centroid or the very strong place of the very wide disposal ability of those transmission bandwidths of network.

The present invention adopts the logic home agent mechanism of a kind of and existing MIP operating such, and a logic home agent can comprise one or several home agent with identical information and come common user for a subnet that service is provided.The logic home agent can be finished distributed user registration and inquiry with corpse according to network conditions and the growth and synchronous automatically of actual operating position.

Each information about firms list item comprises among the LHA: each clauses and subclauses of information about firms table comprise this user's sign (permanent address), Status Flag, Care-of Address (CoA), position and upgrade markers etc.User's sign is user's a permanent sign, it can be the IP address, Status Flag is to be used to refer to this user to be in state of activation or suspended state at present, the Care-of Address here is the gateway address of the subnet at this present place of user, the precedence that markers is used to refer to this renewal is upgraded in the position, also be used for carrying out between the LHA member synchronously.

Described distributed location update method, the step below adopting:

1) user's distributed location update method: the user receives the information of its LHA from its MHA when networking for the first time, when the user moves to external network, select a LHA member to carry out the position renewal nearby.

A concrete example of this method is as shown in Figure 2: when the user roams into external network, it finishes with some of subnet 1 mutual earlier, simultaneously sign, the LHA tabulation of oneself and the tabulation of the peer node (CN) of communicating by letter with it are reported to the gateway of this subnet, gateway carries out the remote location renewal simultaneously: this gateway checks at first whether u1 has been the user of this subnet, to confirm whether this user is the user of the temporary transient off-grid of this subnet, write down the present address binding of this user u1 simultaneously, this is the present position of u1.This gateway according to user's LHA table to wherein nearest one carry out the position and upgrade, SHA1 for example, simultaneously the address of oneself is sent to this LHA and outside CN together as the Care-of Address of u1, to those CN in this subnet then directly the current position informing of u1 they.When LHA received user's location updating message, the affirmation of returning also returned to the user to the present state information of LHA.

2) the LHA information about firms synchronously: upgraded the information of its LHA as certain user after, with these diffusions of information in other member of this LHA, guarantee among the LHA information synchronously.User profile be to finish synchronously by the information exchange between the LHA member, by the time target successively determine the validity of information.When the user its certain LHA member place carried out that the position is upgraded or registration after, receive the member of this information checks whether this user's renewal markers newer: then upgrade these clauses and subclauses in this way, otherwise abandon this log-on message.After this member had upgraded the clauses and subclauses of local data base, other members to this LHA sent user position update message immediately, to guarantee the synchronous of LHA user profile.Other member in this LHA checks markers after receiving location update message: if newly with regard to lastest imformation and return affirmation, this affirmations also is used for definite LHA member's integrity; If older then will judge its source, if right and wrong LHA then directly abandon, if from other LHA then will oppositely transmit a updating message, to indicate corresponding LHA user profile out-of-date.LHA also is notified to a last Care-of Address to this user's new Care-of Address so that the forwarding of follow-up grouping.

Described position query method can be:

Method one: when the user need search purpose user's position, it is forwarded to this request purpose user's the pairing home network in address, pointer by home network inside finds the MHA among the pairing LHA of this user, directly returns to the corresponding positional information of source user by MHA;

Also can be method two: when a certain source user wants to inquire about certain purpose user, it can directly be inquired about for the part in the management entity of mobile subscriber's service to these specially, as long as in these entities of being inquired about one of LHA member who belongs to the purpose user is arranged, so current inquiry is just successful;

Can also method one and method two combine the method for employinging one when home network exists, employing method two when the network failure of local.

Need to prove:

Method one and traditional position query method are similar, and method two only is suitable for Mobility Management Strategy of the present invention, adopt the complete distributed inquiry mechanism.Its foundation is to exist a plurality of mobile management entities for a certain user's service to exist in the network, and still special management entity sum for mobile subscriber's service is limited.Its benefit is the existence that does not need home network fully, has higher reliability and survivability, but the cost of inquiry is higher, needs repeatedly inquiry when one query is failed, and time delay is bigger.This is an exclusive inquiry mode of the present invention, it is a kind of inquiry mode of probabilistic type, the one query probability of successful is relevant with the member's of purpose user's LHA quantity with the quantity of the management entity of inquiring about simultaneously, this can use the situation when the extreme unstable home network of network is all damaged, and guaranteeing needs user's communications.

In for example large-area natural calamity of some urgent occasions, military operation etc., network stabilization difference equipment damages easily, and these occasions often need to have higher communication reliability than usual, for the communication service of high reliability and survivability is provided in these application scenarios, the present invention proposes the logic home agent mobile subscriber way to manage of a kind of and traditional network mobility administrative standard compatibility.Its basic thought is: specially joining together to consider for the mobile subscriber provides the entity of management function in the network, the user of each subnet has a home network and a master home agent MHA in logic, when the reliability decrease of network or when needing management organization to have higher survivability and reliability, MHA will ask dynamically other entity serve as this MHA from home agent SHA, the mechanism that proposes by the present invention guarantee between them information synchronously.Have a plurality of management entities with mobile subscriber of identical information like this in network, these entity informations can be used to realize the distributed renewal of customer location by the user.This mechanism also can realize user's distributed query simultaneously, improves the global reliability energy and the survivability energy of network greatly.

And mobile management is compared between existing net, and the present invention has following characteristics:

1. employing and home network and user's homing position logic home agent mechanism independently all, survivability and reliability are all higher, the LHA that constitutes by MHA and SHA and the location independent of home network, can independently arrange, and quantitatively can change with the need, and the home agent of original mechanism has only one and must be positioned at home network inside;

2. the flexible arrangement of logic home agent can be arranged according to the concrete condition of network, can be along with the survivability and the reliability requirement growth of network management, and it can deteriorate to the management mode with the mobile management compatibility of standard when management expectancy is low;

3. home network is not that physically but in logic the pairing logic home agent of a user member has the function of complete equality, and master slave relation can change at any time, and the member can damage by auto-mending;

4. the method for synchronization between the LHA member of user's triggering adopts markers to carry out the information judgement, and synchronization overhead is little, and is simple and reliable;

5. can finish the distributed treatment of user profile, user's location update message does not need the forwarding through home network, the position upgrade can be direct and nearest a LHA member carry out, when frequently moving or roam, the user can improve the speed of user mobility management greatly like this, reduce time delay and expense that the position is upgraded, improve performance of handoffs, the business that support is had the QoS needs is more favourable;

6. two kinds of user inquiring modes can guarantee under extreme case, when home network is damaged fully, can also search the user by distributed enquiring method of the present invention, guarantee under extreme case the user's communications demand.

The present invention adopts many home agent mechanism to obtain the high survivability and the reliability of mobile subscriber's management.This mode can be used the occasion of damaging easily at those network stabilization difference network equipments, for example the present invention and wireless local area network (WLAN) system or the wireless multi-hop network of pressing the work of Ad Hoc mode of operation are together, use is in the mobile communication of some urgent occasions, for example earthquake, rescue and relief work and Military Application etc. guarantee under extreme case the user's communications demand.Though this situation is rare, but might be very important to telex network, because the communication of urgent more situation often also is important more.

Description of drawings:

Fig. 1 is the schematic diagram of MIP

Wherein: CN is the peer users that communicates with the user, and HA is user's a home agent, and FA is the Foreign Agent of user when roaming into the other places, and u1 is the mobile subscriber.

Fig. 2 is the location registers schematic diagram

Wherein: CN is the peer users that communicates with the user, and u1, u2 are the mobile subscribers, and LHA1, LHA2 are the logic home agent, and MHA1, MHA2 are master home agent, SHA1 be MHA1 from home agent.

Fig. 3 is the position enquiring schematic diagram by home network

Wherein: CN is the peer users that communicates with the user, and LHA1 is the logic home agent, and MHA1 is a master home agent, SHA1 be MHA1 from home agent.

Fig. 4 is the flow chart of setting up of management system of the present invention

Fig. 5 is that user distribution formula of the present invention position is upgraded and register flow path figure

Fig. 6 is a position enquiring flow chart of the present invention.

Embodiment:

Utilize existing wireless access network as 802.11 nets, adopt method of the present invention just can constitute a high survivability and reliability communication network by the software programming to management entity, concrete implementation step is as follows:

1, management system generates

Step 1, the formation logic home agent: the logic home agent abbreviates LHA as, the mobile subscriber in subnet of each LHA management, it comprises the mobile management entity of one or more reality, and the user of different sub-network is managed by different LHA; The concrete generation step of logic home agent is as follows:

1. the generation step of master home agent: master home agent abbreviates MHA as, the user of each subnet is according to its address or the corresponding home network of homing position, the mobile management entity of each home network is as the MHA of mobile subscriber in a certain subnet, also can be used as other user from home agent, abbreviate SHA as from home agent;

2. the generation step of logic home agent: the logic home agent abbreviates LHA as, and the automatic generation of user logic home agent is to realize by the SHA that MHA asks other management entity to serve as its leading subscriber; MHA constitutes this user's LHA with described SHA;

3. the information exchange step after LHA sets up: a user can register at a MHA and a plurality of SHA, and different users can register in different LHA, operation when realizing a plurality of home agent; The member of each LHA links to each other by backbone network, transmits information mutually;

4. the establishment step of MHA and home network corresponding relation: the corresponding same home network of the user under each MHA, MHA can be positioned at home network, also can be positioned at outside the home network, router in the local network internal has the pointer that points to this MHA, revises this pointer and just can change pairing MHA;

Step 2, user's initial registration or register method: the user of initial network entry obtains a sign that belongs to it by network, corresponding home network of this sign and MHA, the user carries out initial registration or registration by this sign: the user sends to this MHA place registration with some essential informations of oneself by home network when initial network entry; MHA receive after the information to this user verify, activation and position upgrade, then among the SHA that user's information and current location is delivered to same LHA; MHA returns to the user with LHA information;

Step 3, confirm LHA member's integrity: when when certain member can not receive another one member's information answer after a while, then send one to this member specially and inquire after determining whether it is intact, if still can not receive replying then can confirming that it damages of this member;

The method that the damage of LHA different members is handled: when a SHA damage, MHA will increase extra SHA and replace; If MHA damage, the SHA that at first finds the MHA damage will take over the function of former MHA and revise the pointer of user's home network simultaneously, and the method when damaging by an above-mentioned SHA is more afterwards handled; If home network damage, MHA can not receive the integrity information of home network, it just transmits request to the perimeter network issue of home network so, gives them with user and the address notification of oneself that it is managed itself, and all go to the inquiry of former home network to be blocked like this;

2, distributed location is upgraded

Step 1, user's distributed location is upgraded: the user receives the information of its LHA from its MHA when networking for the first time, when the user moves to external network, select a LHA member to carry out the position renewal nearby;

Step 2, between LHA member information synchronously: user profile be to finish synchronously by the information exchange between the LHA member, target is successively determined the validity of information during by user profile; When the user its certain LHA member place carried out that the position is upgraded or registration after, receive the LHA member of this information can check whether this user's renewal markers newer: then upgrade these clauses and subclauses in this way, otherwise abandon this log-on message; After this member had upgraded the clauses and subclauses of local data base, other members to this LHA sent user position update message immediately, to guarantee the synchronous of LHA user profile; Other member in this LHA checks markers after receiving location update message: if newly with regard to lastest imformation and return affirmation, this affirmations also is used for definite LHA member's integrity; If older then will judge its source, if right and wrong LHA then directly abandon, if from other LHA then will oppositely transmit a updating message, to indicate corresponding LHA user profile out-of-date; LHA also is notified to a last Care-of Address to this user's new Care-of Address so that the forwarding of follow-up grouping;

3, position enquiring

Method one: when the user need search purpose user's position, it is forwarded to the pairing home network of purpose station address with this request, pointer by home network inside finds the MHA among the pairing LHA of this user, directly returns to the corresponding positional information of request user by MHA;

Method two: when a certain user wants to inquire about certain purpose user, it can directly be inquired about for the part in the management entity of mobile subscriber's service to these specially, as long as in these entities of being inquired about one of LHA member who belongs to the purpose user is arranged, then successful inquiring;

Can also method one and method two combine the method for employinging one when home network exists, employing method two when the network failure of local.

The inventive method can be implemented in the communication needs of some urgent occasions, for example taking place under the situations such as earthquake, large-scale natural calamity and Military Application, can damage the reliable management that realizes under the very poor situation of serious stability the mobile subscriber at network infrastructure by making up this network, guarantee under extreme case the user's communications demand.

Claims (1)

1, management method of mobile between a kind of distributed user network comprises: management system generation, distributed location update method and position query method; It is characterized in that:

Described management system generates, the step below adopting:

Step 1, the formation logic home agent abbreviates LHA as: the mobile subscriber in subnet of each LHA management, it comprises the mobile management entity of one or more reality, and the user of different sub-network is managed by different LHA; The concrete generation step of logic home agent is as follows:

1. the generation step of master home agent: master home agent abbreviates MHA as, the user of each subnet is according to its address or the corresponding home network of homing position, the mobile management entity of each home network is as the MHA of mobile subscriber in a certain subnet, also can be used as other user from home agent; Abbreviate SHA as from home agent;

2. the generation step of logic home agent: the logic home agent abbreviates LHA as, and the automatic generation of user logic home agent is to realize by the SHA that MHA asks other management entity to serve as its leading subscriber; MHA constitutes this user's LHA with described SHA;

3. the information exchange step after LHA sets up: a user can register at a MHA and a plurality of SHA, and different users can register in different LHA, operation when realizing a plurality of home agent; The member of each LHA links to each other by backbone network, transmits information mutually;

4. the establishment step of MHA and home network corresponding relation: the corresponding same home network of the user under each MHA, MHA can be positioned at home network, also can be positioned at outside the home network, router in the local network internal has the pointer that points to this MHA, revises this pointer and just can change pairing MHA;

Step 2, user's initial registration or register method: the user of initial network entry obtains a sign that belongs to it by network, corresponding home network of this sign and MHA, the user carries out initial registration or registration by this sign: the user sends to this MHA place registration with some essential informations of oneself by home network when initial network entry; MHA receive after the information to this user verify, activation and position upgrade, then among the SHA that user's information and current location is delivered to same LHA; MHA returns to the user with LHA information;

Step 3, confirm LHA member's integrity: when when certain member can not receive another one member's information answer after a while, then send one to this member specially and inquire after determining whether it is intact, if still can not receive replying then can confirming that it damages of this member;

The method that the damage of LHA different members is handled: when a SHA damage, MHA will increase extra SHA and replace; If MHA damage, the SHA that at first finds the MHA damage will take over the function of former MHA and revise the pointer of user's home network simultaneously, and the method when damaging by an above-mentioned SHA is more afterwards handled; If home network damage, MHA can not receive the integrity information of home network, it just transmits request to the perimeter network issue of home network so, gives them with user and the address notification of oneself that it is managed itself, and all go to the inquiry of former home network to be blocked like this;

Described distributed location update method, the step below adopting:

Step 1, user's distributed location is upgraded: the user receives the information of its LHA from its MHA when networking for the first time, when the user moves to external network, select a LHA member to carry out the position renewal nearby;

Step 2, between LHA member information synchronously: user profile be to finish synchronously by the information exchange between the LHA member, target is successively determined the validity of information during by user profile; When the user its certain LHA member place carried out that the position is upgraded or registration after, receive the LHA member of this information can check whether this user's renewal markers newer: then upgrade these clauses and subclauses in this way, otherwise abandon this log-on message; After this member had upgraded the clauses and subclauses of local data base, other members to this LHA sent user position update message immediately, to guarantee the synchronous of LHA user profile; Other member in this LHA checks markers after receiving location update message: if newly with regard to lastest imformation and return affirmation, this affirmations also is used for definite LHA member's integrity; If older then will judge its source, if right and wrong LHA then directly abandon, if from other LHA then will oppositely transmit a updating message, to indicate corresponding LHA user profile out-of-date; LHA also is notified to a last Care-of Address to this user's new Care-of Address so that the forwarding of follow-up grouping;

Described position query method has following three kinds of methods:

Method one: when the user need search purpose user's position, it is forwarded to the pairing home network of purpose station address with this request, pointer by home network inside finds the MHA among the pairing LHA of this user, directly returns to the corresponding positional information of request user by MHA;

Method two: when a certain user wants to inquire about certain purpose user, it can directly be inquired about for the part in the management entity of mobile subscriber's service to these specially, as long as in these entities of being inquired about one of LHA member who belongs to the purpose user is arranged, then successful inquiring;

Method three: associated methods one and method two, employing method one when home network exists adopts method two when the network failure of local.