CN101340338B - Service stream management method for mobile Internet - Google Patents
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- CN101340338B CN101340338B CN2008101180701A CN200810118070A CN101340338B CN 101340338 B CN101340338 B CN 101340338B CN 2008101180701 A CN2008101180701 A CN 2008101180701A CN 200810118070 A CN200810118070 A CN 200810118070A CN 101340338 B CN101340338 B CN 101340338B
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Abstract
The invention provides a method for managing traffic streams used in mobile internet. Under the precondition that compatible standard moves IP protocol, mobile nodes are permitted to be out of the home proxy and main home address, at the same time, a plurality of distribution-typed home proxy server DHPs and distribution-typed home address DHoAs exist, and the position management in which the traffic stream is taken as granularity and the transmission route control are realized. MN can select DHP for different traffic streams dynamically, the DHP which provides service for each traffic stream is selected near a communication node of the corresponding opposite end, therefore, end-to-end delay in the communication of the mobile node and the communication node of the opposite end is shortened effectively. MN realizes the switching in which the traffic stream is taken as granularity and transmission route control in the process of movement. The introduction of DHP greatly reduces the dependency on HA by MN, thus not only reducing the congestion in home network and HA load, but also reducing the influence on MA by the possible failure and fault on the home network and HA, at the same time, the network domain in which CN is located can monitor and control the traffic streams conveniently.
Description
Technical field
The present invention relates to mobile IP protocol administrative skill field, more particularly, the present invention relates to a kind of service flow management method that is used for mobile Internet.
Background technology
Mobile IP is a kind of special IP routing mechanism, and mobile node can be attached on any link with a permanent IP address, keeps the continuation of communication in the process that moves.Mobile IP has two standards now, is respectively mobile IPv 4 (RFC 3344) and mobile IP v 6 (RFC 3775).
Mobile IPv 4
When mobile node is connected on the home link, when promptly the network prefix of the network prefix of link and moving nodes local address equated, mobile node is worked the same with fixed host computer or router just, do not use any mobile IP function.For the mobile node that is connected on the foreign link, can judge the current location of oneself, and obtain a Care-of Address (CoA) on foreign link by a process that is called agency's search.When mobile node changed foreign link, Care-of Address changed thereupon.Subsequently, mobile node is told home agent the Care-of Address of oneself by registration process.When mailing to the packet of moving nodes local address, home agent just intercepts this bag, and according to the Care-of Address of registering, sends packet to mobile node by the tunnel.Packet by mobile node sends can be routed directly to destination node, need not tunneling technique.Concerning all visiting mobile nodes, Foreign Agent is finished the function of router.
The defective of mobile IPv 4
(1), because the message that the opposite end communication node mails to mobile node must be sent to the home network of mobile node earlier, be forwarded to the mobile node present care-of address by home agent by the tunnel then, this triangle route can increase communication delay;
(2), when mobile node when a subnet moves to another subnet, mobile node need send a location update message to home agent, even mobile node is not communicated by letter and the data contact with the external world in moving process, this registration process also will be carried out, when a lot of or travel frequency is very high when the quantity of mobile node, this will be a very big signaling consumption;
(3) if the field network at mobile node place and home network distance are far, then mobile node sends location update message to home agent and will cause very big switching delay.
Mobile IP v 6
The mobile IP v 6 technology is to grow up on the basis of mobile IPv 4, has defined three kinds of application entities in its agreement: mobile node (MN), opposite end communication node (CN) and home agent (HA) do not comprise Foreign Agent (FA).When mobile node leaves link-local, can obtain Care-of Address (for example, stateless and have state to dispose automatically) by IPv6 mechanism.Adopt tunnel and source routing technology to the mobile node transfer data packets that is connected on the foreign link in the mobile IP v 6 simultaneously.
Because mobile IP exists the triangle routing issue, communication delay is big, can't satisfy the needs of real-time application.For this reason, introduced routing optimality (Route Optimization) mechanism in the mobile IP protocol shortening the end-to-end time delay between the communication of mobile node and opposite end communication node, mobile IPv 6 protocol especially routing optimality as its basic part.
Routing optimality requires MN to register present care-of address CoA on CN, is routed directly to the Care-of Address of MN from the packet of CN.When CN will send a packet, at first detect the banding cache item on packet rs destination ground, if find the banding cache item of destination, then CN routes a data packet to MN with a new IP route header type via the Care-of Address of binding.This mode can guarantee that packet directly arrives mobile node through the shortest path, thereby avoid the triangle route, reduce the congested of the home agent of mobile node and home link, and reduce the influence that possible failure causes MN signal post on home agent or the home link.
Yet routing optimality needs opposite end communication node CN also to support mobile IP, thereby increases the difficulty of disposing greatly.Simultaneously, each communication host must be treated fixing Correspondent Node and the Correspondent Node that moves differentiation.In addition, routing optimality may bring serious safety problem.Therefore, routing optimality pattern practical application at present is also considerably less.
Mobile IP requires mobile node with each position change notice home agent.Consequently the home link of mobile node takes place congested easily and makes home agent become communication performance bottleneck.Particularly, can cause bigger handoff delay, thereby cause the serious packet loss and the decline of communication throughput as MN during away from home network.Routing optimality further requires mobile node to move to notify all to keep the communication node of communicating by letter with it at every turn, thereby further causes a large amount of logon messages, and not only the valuable Internet resources of waste also can cause network conflict, reduce the transmission of valid data.
Hierarchical mobile IPv 6 (Hierarchical Mobile IPv6, HMIPv6; H.Soliman, C.Castelluccia, K.E.Malki and L.Bellier, Hierarchical Mobile IPv6mobility management (HMIPv6), IETF RFC 4140 Aug.2005) has introduced mobile anchor point (Mobility Anchor Point, MAP) this new entity, be divided into by turnover zone that macroscopic view moves and microcosmic moves, the influence of handoff procedure is controlled in the subnet scoping, reduced the time-delay and the signaling consumption of address binding renewal process mobile node.Yet HMIPv6 can only improve the registration process that microcosmic moves, and moves inoperatively for the macroscopic view between the MAP territory, and does not solve triangle routing issue in the data message transmission course, does not also support the switching based on Business Stream.And this method needs the whole network architecture all be upgraded to simultaneously to support HMIPv6, and can not upgrade by the mode of gradual change, and this also is one of present HMIPv6 reason that always can not be widely used.
R.Zheng, Y.Ge, J.C.Hou and S.R.Thuel. is at document Acase for mobilitysupport with temporary home agents (ACM SIGMOBILE Mobile Computing andCommunications Review, vol.6, no.1, pp.32-46, Jan.2002) (Temporary Home Agent THA) solves the triangle routing issue by introducing interim home agent in middle proposition.THA is responsible for transmitting data message to the MN that moves to field network.THA is positioned at the gateway place of the field network of MN current accessed, to the interim home address of MN dynamic assignment (THAddr), and upgrades dns server on the MN home network with THAddr.MN uses THAddr to initiate and the communicating by letter of CN as source address.Main by shortening the distance between MN and HA, reduce the end-to-end time delay in MN and the CN communication process.Yet the basic thought of mobile IP is that moving of positions of mobile nodes do not change the employed home address of the ongoing communication of mobile node.And the method only provides this function to the external connection that mobile node is initiated again at new network.Connection request from the outside need be known THAddr by the support of home network DNS, and those move before at the communication of the carrying out home address of will having to change, perhaps still use the mobile IP protocol of standard to communicate.Because how what mobile IP itself solved keeps the unbroken problem of original connection exactly in moving process, strictly speaking the method has run counter to the use scene of mobile IP.In addition, the method does not support with the Business Stream to be the switching and the transmission path control of granularity.
Though how mobile IP v 6 not definition itself uses many HA, supports the reconfiguration technology of home network.In this case, mobile node is not known the address of its home agent, and the local subnet prefix may change at any time.Can adopt a kind of " dynamic home agent address discovery mechanism " this moment, dynamically finds hometown-agent-address by mobile node, learns new local subnet prefix information by the prefix discovery mechanism.At present, the mobile IP framework that some many HA also occurred, but existing many HA mechanism mainly is for load balancing (A.Vasilache, J.Li and H.Kameda.Threshold-based loadbalancing for multiple home agents in Mobile IP networks.Telecommunications Systems, vol.22, no.1-4, pp.11-31, Jan.-Apr., 2003) or solve fault-tolerant problem (J.H.Ahn and C.s.Hwang.Low-cost fault-tolerance for mobile nodes in Mobile IP based systems.Proceedings of the 21st International Conference on DistributedComputing Systems Workshops under the single HA actual effect situation, pp.508-514, Mesa, AZ, USA, Apr.16-19,2001) (J.W.Lin and J.Arul.An efficient fault-tolerant approach forMobile IP in wireless systems.IEEE Transactions on Mobile Computing, vol.2, no.3, pp.207-220,2003), its objective is enhancing reliability and raising disposal ability.A plurality of HA are in same home link mostly, are transparent to MN, and MN still only writes down single HA, and just adopt the mode of multi-computer back-up to make that HA work is more stable.With regard to its essence, each MN of synchronization has only a HA to be its service, and is as broad as long with traditional mobile IP protocol, can not select different transmission paths for different business stream, also do not solve the triangle routing issue.
Summary of the invention
For overcome existing mobile IP protocol do not support with the Business Stream be granularity switching and transmission path control, can not solve the problem of triangle route, the present invention proposes a kind of service flow management method that is used for mobile Internet.
According to an aspect of the present invention, proposed a kind of service flow management method that is used for mobile Internet, be deployed with distributed home agent services device in each subdomain of described mobile Internet, described method comprises:
The type of the Business Stream of step 10), the new connection request of mobile node basis determines that described Business Stream need move support;
Step 20), the Business Stream of initiating for described mobile node, the described distributed home agent services device of inquiry in the subdomain of communication node place, the opposite end of described Business Stream correspondence;
Step 30), inquire described distributed home agent services device after, described mobile node is to the distributed home address of selected described distributed home agent services device application, and connects with described distributed home address and described opposite end communication node;
Step 40), described mobile node and described opposite end communication node carry out data communication.
Described method also comprises:
Step 50), roam when described mobile node, QoS situation, current business flow priority and qos requirement according to new access network, for the Business Stream of needs continuation communication, described mobile node carries out Binding Update with new Care-of Address to described distributed home agent services device; For the Business Stream that does not need to continue or QoS can't satisfy, end described Business Stream.
Wherein, described distributed home agent services device is progressive to be deployed in each subdomain of mobile Internet, and compatible existing mobile IP protocol.
Wherein, dispose one or more distributed home agent services device in each described subdomain, described a plurality of distributed home agent services devices can be used for redundancy backup; And described distributed home agent services device is arranged in around the communication node of described opposite end, and preferred deployment is on multi-homed host
Wherein, also comprise:
Dispose described distributed home agent services device in network domains that described opposite end communication node is concentrated or hot spot region, the existing home agent of perhaps upgrading is described distributed home agent services device;
Enlarge and dispose described distributed home agent services device, make all to have described distributed home agent services device in each network domains, and to existing mobile node upgrading.
Wherein, step 20) in, the distributed home agent services device in the described subdomain returns response, and the information of informing described mobile node includes but not limited to address information, the load information of described distributed home agent services device; Mobile node is selected described distributed home agent services device according to such as the light or nearest different condition of load.
Wherein, step 20) in, described inquiry mode is one of them of following four kinds of modes:
1), can ask described distributed home agent services device directly to be replied and realize inquiry by in territory, communication node place, described opposite end, sending request;
2), can be by sending multicast requesting node address message, the described distributed home agent services device of remote inquiry address;
3), can obtain in the communication node territory, opposite end or by sending request to specific server in logic near the described distributed home agent services device in the territory of opposite end communication node;
4), can return the described distributed home agent services device information of its place network by the opposite end communication node by sending request to the opposite end communication node.
Wherein, described in opposite end communication node transmission request mode, described opposite end communication node need be supported distributed home agent services device inquiry, the distributed home agent services device information of place network can be found and preserve, and the distributed home agent services device Query Information that mobile node is sent can be replied.
Wherein, step 20) also comprise: do not initiate if described Business Stream is not described mobile node, described mobile node connects with home address and described opposite end communication node.
Wherein, step 30) also comprise: if do not inquire described distributed home agent services device, described mobile node connects with home address and described opposite end communication node.
Wherein, step 40) in, described mobile node selects for use routing optimality pattern or bidirectional tunnel pattern and described opposite end communication node to carry out data communication according to described opposite end communication node to the support situation of route optimization.
Wherein, step 40) also comprises: if the opposite end communication node is supported routing optimality, described mobile node can be registered by Binding Update Care-of Address to the opposite end communication node, after succeeding in registration, described mobile node will utilize Care-of Address and described opposite end communication node to communicate; If the opposite end communication node is not supported routing optimality, described mobile node is communicated by letter with described opposite end communication node through distributed home agent services device or home agent.
Method of the present invention is under the prerequisite of the mobile IP protocol (comprising mobile IPv 4 and mobile IP v 6) of compatibility standard, allow mobile node (MN) outside home agent (HA) and master home address (HoA), have a plurality of distributed home agent services devices (DHP) and distributed home address (DHoA) simultaneously.MN selects whether to start mobility management protocol according to type of service and Business Initiator, and further selection is the mobile IP of startup standard or starts the DMIP that the present invention proposes.DMIP supports that MN is that the different business flowable state is selected DHP, for the DHP of each traffic stream service selects the opposite end of correspondence communication node (CN) near, thereby effectively shortens the mobile node central end-to-end time delay of communicating by letter with the opposite end communication node.MN can take different mobile management strategies with actual demand to different business stream according to network condition in moving process, realize with the Business Stream being the location management and the transmission path control of granularity.
Because DHP is near CN (general and CN is positioned at consolidated network), DMIP proposed by the invention can avoid the triangle route and effectively improve transmission performance.In addition, DMIP improves than the essence of mobile IP protocol and is, will be the management mode of granularity with the whole node in original mobile IP protocol, and upgrading to single Business Stream is the management mode of granularity.MN can take different mobile management strategies with actual demand to different business stream according to network condition in moving process, realize with the Business Stream being the switching and the transmission path control of granularity.The introducing of DHP makes MN greatly reduce the dependence of HA, has not only reduced the load of the congested and HA of home network, has also reduced the influence to MN of upward possible failure of home network and HA and fault.Simultaneously, the introducing of DHP make the CN of server category at itself under news more, can strengthen its mobility support by the mode of in the present networks territory, disposing DHP to client.The network at CN place then can monitor Business Stream and control easily, and can form towards the mobile subscriber, the business model at the DHP of a certain focus CN service is provided.The deployment of the DMIP that is proposed can adopt progressive mode progressively to carry out fully, IP is moved in both protocols havings keep compatible.
Description of drawings
Fig. 1 illustrates the new handling process of setting up that connects among the DMIP;
Fig. 2 illustrates the handling process of roam procedure among the DMIP.
Embodiment
Below in conjunction with the drawings and specific embodiments a kind of service flow management method that is used for mobile Internet provided by the invention is described in detail.
That the method that the present invention proposes can be called is distributed, with the network layer mobility solution (DMIP) of mobile IP compatibility, in existing mobile IP framework, introduce distributed home agent services device (Distributed Home-Proxy, DHP).In DMIP, in each subdomain of network, dispose DHP, promptly around each CN, dispose DHP.DHP is that the expansion of HA realizes, a plurality of separate DHP (for example by different company's operations) that also can distribute in the same territory are the same with the deployment way of HA, are exactly the deployment way of general router.In this case, MN can according to circumstances select one or more DHP to be its service with needs.Certainly, generally in a territory, only need to select a DHP, but an also optional majority DHP is used for redundancy backup or improves concurrent performance.
The deployment of DHP can adopt progressive mode to carry out, and existing protocol is moved IP keep compatible.Initial stage, the part MN that can upgrade earlier, and in network domains that CN concentrates or hot spot region (for example, well-known ISP and website), dispose DHP or the existing HA that upgrades to DHP, and do not change the router on CN and the network.At this moment, during the CN of new MN in these network domains of visit, can inquire about obtaining DHP, and utilize DHP to carry out communication.Simultaneously, MN if fail to obtain DHP information, then still adopts original mobile IP mode to communicate when other CN of visit.And the old MN that does not upgrade, too can the travel all over network.Newly, the communication between the old MN, still use original mobile IP protocol.
The development middle and later periods can enlarge the deployment of DHP gradually, realizes all existing in each network domains DHP; Simultaneously, existing MN is upgraded gradually.
DHP itself can with the CN combination, also can separate with CN and and the ISP combination, even can be responsible for by service provider independently, as a kind of extra service, offer the frequent mobile node that needs roaming.In addition, when specific implementation, also can set up specially towards the mobile subscriber, the business model at the DHP service of a certain focus CN is provided.In the service that DHP provides, also can carry out classification according to user's economic conditions and wish, for example, provide permanent distributed home address etc.
DHP supports following operation: DHP_query and DHP_response simultaneously outside the HA existing capability.DHP_query is sent by network node, DHP node in can certain network domains of remote inquiry, after each DHP in this network receives this message, provide the DHP_response response respectively, inform the current information of network node DHP self, include but not limited to address information, load information or the like, so that mobile node is selected suitable DHP (particularly when having a plurality of DHP in the same territory).That is to say, the choice criteria that mobile node can be different according to the needs definition of oneself, such as selecting load the lightest, the perhaps nearest DHP of chosen distance etc.Usually, suggestion DHP is deployed on the main frame of many places (multihomed) as far as possible, supports a plurality of ISP access networks to promote performance simultaneously.
For new connection request, MN at first judges its application type.It is generally acknowledged that the TCP of short time or UDP use does not need mobile IP to support, for example dns resolution, and TCP uses for a long time, and Telnet for example, perhaps UDP uses, and for example VoIP then needs mobile IP to support.For the type of service that does not need mobile IP to support, MN connects with CoA and CN, does not carry out the function of any mobile IP.For the type of service that the mobile IP of needs supports, initiate if connect by CN, then MN connects with HoA and CN, and then the mobile IP flow process of operative norm; Initiate if connect by MN, then MN will carry out the DHP query function, and successful inquiring is then carried out the DMIP flow process, otherwise the mobile IP flow process of operative norm.
The purpose of DHP inquiry is the DHP address and the state that will obtain the CN place network of this Business Stream correspondence.If search suitable DHP in territory, CN place, MN will apply for distributed home address DHoA (Distributed Home Address) to selected DHP, and connect with DHoA and CN; Otherwise MN will connect with HoA and CN, the mobile IP flow process of operative norm.
Subsequently, MN can judge with the routing optimality pattern still to be that the bidirectional tunnel pattern is carried out communication to the support situation of mobile IP according to CN.In the communication process of MN and CN, if roaming has taken place in MN, caused the address modification of MN, MN can be according to the QoS situation of new access network and the priority and the qos requirement of current business, and whether the qos requirement of judging each Business Stream one by one can be met and whether need to continue this Business Stream.Continue the Business Stream of communication for needs, MN carries out Binding Update with new CoA address to corresponding D HP, and for the Business Stream that does not need to continue or QoS can't satisfy, MN can initiatively end this Business Stream.
In mobile IP, after the MN application obtained home address, its flow process was event driven.When new connection request, MN can utilize HoA and CN to connect.Then, MN can judge whether to carry out routing optimality to the support situation of mobile IP according to CN: if CN supports routing optimality, then MN can (Binding Update BU) registers to CN by Binding Update with Care-of Address CoA, after succeeding in registration, MN will utilize CoA and CN to carry out normal communication; If CN does not support routing optimality, then MN communicates by letter with CN through HA, bidirectional tunnel pattern that Here it is.After MN roams, can trigger switching, MN registers new CoA address to HA then, and then MN can recover to communicate by letter with CN.At this moment, if CN supports routing optimality, MN can register new CoA once again to CN, thereby reduces the loss of communications of bringing because of the triangle route.
In according to one embodiment of present invention, Fig. 1 illustrates the handling process of new connection request among the DMIP, comprising:
S101:MN judges according to the type of service of new connection request whether needs move support to this Business Stream, if, change S103, otherwise, S102 changeed;
S102:MN connects with CoA and CN, changes S109;
S103: judge whether new connection request is that MN initiates, and being changes S104, does not change S107;
S104:MN inquires about the DHP address and the state of the CN place network of this Business Stream correspondence, and the implementation of DHP inquiry has four kinds: 1) can be by sending DHP_query to map network, and request DHP directly replys and realizes.This process is similar to " dynamic home agent address discovery mechanism " among the MIPv6, and this mechanism allows mobile node dynamically to find the IP address of the home agent on its home network, even current mobile node is not in its home network; 2) can be by sending multicast requesting node address message (RFC2373), remote inquiry DHP address; 3) can obtain in the CN territory or in logic near the DHP in the territory of CN by send request to specific server; 4) can be by sending request to CN, the DHP information of being replied its place network by CN realizes; If CN is for supporting the node of DMIP, then CN can find and preserve the DHP information of own place network, and can reply the DHP Query Information that MN sends, in this case, MN can be by sending request to CN, and the DHP information of being replied its place network by CN realizes the DHP discovery procedure.But this kind inquiry mode is inapplicable to common CN;
S105: (suitable standard is to satisfy the demand if search suitable DHP in territory, CN place, just at first can in territory, CN place, find DHP, and situations such as the load of this DHP, disposal ability also can satisfy professional needs), then change S106, otherwise change S107;
S106:MN applies for distributed home address DHoA to selected DHP, and connects with DHoA and CN, changes S108;
S107:MN connects with HoA and CN;
S108: the support situation of route optimization is judged with the routing optimality pattern still to be that the bidirectional tunnel pattern communicates according to CN, wherein, adopt the routing optimality pattern to communicate to the CN that supports routing optimality, and adopt general bidirectional tunnel pattern to communicate the CN that does not support routing optimality;
Carry out data communication between S109:MN and CN.
In the communication process of MN and CN, if roaming has taken place MN, for the Business Stream of enabling DHP, the handling process of DMIP as shown in Figure 2.
S201:MN is according to the QoS situation of new access network, and the priority of current business and qos requirement, and whether the qos requirement of judging this Business Stream can be met and whether need to continue this Business Stream;
S202: for the Business Stream of needs continuation communication, MN carries out Binding Update with new CoA address to DHP;
S203: for the Business Stream that does not need to continue or QoS can't satisfy, MN initiatively ends this Business Stream.
Because DHP is near CN (generally should be positioned at consolidated network with CN), DMIP can avoid the triangle route and effectively improve transmission performance.In addition, DMIP improves than the essence of mobile IP and is, will be the management mode of granularity with the whole node in original mobile IP protocol, and upgrading to single Business Stream is the management mode of granularity.MN can take different mobile management strategies with actual demand to different business stream according to network condition in moving process, realize with the Business Stream being the switching and the transmission path control of granularity.
DMIP also can provide following new function except promoting performance of handoffs and transmission performance in the mobile IP of compatibility:
● allowing MN is that granularity manages and controls with the Business Stream.For example when high bandwidth network switches to low-bandwidth network (as switching to GPRS from WLAN), mobile node can initiatively stop the Business Stream (for example file is downloaded and video request program) of some high bandwidth requirements by selectively carrying out Binding Update to part DHP.By contrast, in mobile IP and hierarchical mobile IP, after mobile node was roamed, in case MN has registered new CoA to HA, all CN just can be initiatively to the HA pushed information; Even MN selects to stop some Business Stream, before the peer node of this Business Stream obtained termination information, the Business Stream that the mass data that its CN pushes still may make MN go up other sank into paralysis in short-term.
● the network domains at permission CN place monitors Business Stream and controls.In general, need in the MN moving process, keep the opposite end communication node of session mostly to be server (as VOD server, Email server, FTP server etc.) in the actual environment.The introducing of DHP makes this type of CN under news more, can strengthen its mobility support to client.In addition, the Business Stream that flows into and flow out can be monitored and control to CN place network easily.For example, ISP can be provided with rule and control roamer's number on its DHP that provides, and also can provide special networks QoS etc. for DHP user.
It should be noted that at last, above embodiment is only in order to describe technical scheme of the present invention rather than the present technique method is limited, the present invention can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in spirit of the present invention and teachings.
Claims (11)
1. a service flow management method that is used for mobile Internet is deployed with distributed home agent services device in each subdomain of described mobile Internet, and described method comprises:
Business Stream initially connects establishment stage, comprising:
The type of the Business Stream of step 10), the new connection request of mobile node basis determines that whether described Business Stream needs to move support, takes direct-connected mode for the Business Stream that does not need to move support;
Step 20), the type of service supported for the mobile IP of needs, at the Business Stream that described mobile node is initiated, the described distributed home agent services device of inquiry in the subdomain of communication node place, the opposite end of described Business Stream correspondence;
Step 30), inquire described distributed home agent services device after, described mobile node is to the distributed home address of selected described distributed home agent services device application, and connects with described distributed home address and described opposite end communication node;
Step 40), described mobile node and described opposite end communication node carry out data communication;
Business Stream is maintenance phase in the roam procedure of mobile node, comprising:
Step 50), after described mobile node is roamed, in new access network, to needs communication and satisfy the Business Stream of communication QoS, described mobile node carries out Binding Update with new Care-of Address to selected described distributed home agent services device; For the Business Stream that does not need to continue or QoS can't satisfy, described mobile node does not then carry out Binding Update with new Care-of Address to selected described distributed home agent services device, and initiatively ends this Business Stream;
Wherein, described method also comprises: dispose described distributed home agent services device in network domains that described opposite end communication node is concentrated or hot spot region, the existing home agent of perhaps upgrading is described distributed home agent services device; Enlarge and dispose described distributed home agent services device, make all to have described distributed home agent services device in each network domains, and to existing mobile node upgrading.
2. the method for claim 1, wherein described distributed home agent services device is progressive to be deployed in each subdomain of mobile Internet, and compatible existing mobile IP protocol.
3. method as claimed in claim 2 wherein, is disposed one or more distributed home agent services device in each described subdomain, described a plurality of distributed home agent services devices are used for redundancy backup; And described distributed home agent services device is arranged in around the communication node of described opposite end.
4. the method for claim 1, wherein step 20), the distributed home agent services device in the described subdomain returns response, and the information of informing described mobile node comprises address information, the load information of described distributed home agent services device; The condition that mobile node is light or nearest according to load is selected described distributed home agent services device.
5. the method for claim 1, wherein step 20), described inquiry mode is one of them of following four kinds of modes:
1), realizes inquiring about by in territory, communication node place, described opposite end, sending request, asking described distributed home agent services device directly to be replied;
2), by sending multicast requesting node address message, the described distributed home agent services device of remote inquiry address;
3), obtain in the communication node territory, opposite end or in logic near the described distributed home agent services device in the territory of opposite end communication node by sending request to specific server;
4), pass through to return the described distributed home agent services device information of its place network by the opposite end communication node to opposite end communication node transmission request.
6. method as claimed in claim 5, wherein, described in opposite end communication node transmission request mode, described opposite end communication node need be supported distributed home agent services device inquiry, find and preserve the distributed home agent services device information of place network, and reply the distributed home agent services device Query Information that mobile node is sent.
7. the method for claim 1, wherein step 20) also comprise: initiate if described Business Stream is not described mobile node, described mobile node connects with home address and described opposite end communication node.
8. the method for claim 1, wherein step 30) also comprise: if do not inquire described distributed home agent services device, described mobile node connects with home address and described opposite end communication node.
9. the method for claim 1, wherein step 40), described mobile node selects for use routing optimality pattern or bidirectional tunnel pattern and described opposite end communication node to carry out data communication according to described opposite end communication node to the support situation of route optimization.
10. method as claimed in claim 9, wherein, step 40) also comprises: if the opposite end communication node is supported routing optimality, described mobile node can be registered by Binding Update Care-of Address to the opposite end communication node, after succeeding in registration, described mobile node will utilize Care-of Address and described opposite end communication node to communicate; If the opposite end communication node is not supported routing optimality, described mobile node is communicated by letter with described opposite end communication node through distributed home agent services device or home agent.
11. method as claimed in claim 3, wherein, described distributed home agent services device is deployed on the multi-homed host.
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| CN2008101180701A CN101340338B (en) | 2008-08-07 | 2008-08-07 | Service stream management method for mobile Internet |
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| CN102480468B (en) * | 2010-11-25 | 2015-08-19 | 中国移动通信集团公司 | A kind of data flow transmission method, Apparatus and system |
| US8798028B2 (en) * | 2011-05-16 | 2014-08-05 | Futurewei Technologies, Inc. | System, apparatus, and method for distributed home agents in a mobile IP environment |
| CN111988212B (en) * | 2019-05-23 | 2021-10-22 | 华为技术有限公司 | Message transmission method and related device |
| CN110933134A (en) * | 2019-10-30 | 2020-03-27 | 中国科学院计算机网络信息中心 | Industrial internet-oriented edge computing server load balancing method and system |
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