CN101253791B

CN101253791B - A method of reconfiguring an internet protocol address in handover between heterogeneous networks

Info

Publication number: CN101253791B
Application number: CN2006800124281A
Authority: CN
Inventors: 金龙浩; 郭龙源; 李�真
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2005-04-14
Filing date: 2006-04-14
Publication date: 2011-08-10
Anticipated expiration: 2026-04-14
Also published as: TWI398176B; CN101253791A; KR20060109300A; IL186574A0; TW200708152A; KR101216081B1; IL186574A; MX2007012502A

Abstract

A method of communicating information in a wireless mobile communication system is disclosed. More specifically, the method includes a network for establishing handover management modules in a source network and a target network and transmitting a handover request message from the handover management module of the source network to the handover management module of the target network. Furthermore, the network is used for receiving a handover response message from the handover management module of the target network to the handover management module of the source network, wherein the handover response message includes an internet protocol address information and transmitting a handover confirmation message from the handover management module of the source network to a mobile terminal, wherein the handover confirmation message includes the internet protocol address information.

Description

Reconfigure the method for internet protocol address when between different types of network, switching

Technical field

The present invention relates to the switching between different types of network, especially, relate to the method that reconfigures the IP address when between different types of network, switching.Though the present invention is applicable to wide range of application, it is particularly useful for allowing mobile subscriber station to carry out switching effectively between different types of network.

Background technology

Normally, purpose at the IEEE 802.21 of the well afoot of the International standardization that is used between different types of network media independently switching is to strengthen the facility that the user is used for mobile subscriber's station equipment by seamless switching and service continuity are provided between different types of network.MIH function, Event triggered, command service and information service (IS) are defined as basic demand.

Mobile subscriber station (MSS) is a multi-mode node of supporting at least two kinds of interface types.Here, this interface for example can be wired style interface, such as, Ethernet based on 802.3, based on IEEE 802.XX (such as, IEEE 802.11, IEEE 802.15, IEEE 802.16 or the like) wireless interface type, all be admissible by interface type such as 3GPP and 3GPP2 or the like cellular standards mechanism definition.

Fig. 1 is the schematic diagram of the protocol stack structure of multi-mode mobile subscriber station.

With reference to figure 1, the multi-mode mobile subscriber station all has a physical layer for each pattern, and all has a MAC layer for each pattern.And the MIH layer is positioned at below the IP layer.

Media independent handovers (media independent handover, MIH) should be limited between IEEE 802 series interfaces, perhaps be limited to such as between above-mentioned 802 series interfaces by non-802 series interfaces that define such as cellular standards mechanisms such as 3GPP and 3GPP2.In addition,, should support the mobility of upper-layer protocol, such as mobile IP and SIP (session initiation protocol) for the seamless switching service.

Mobile IPv 4 is explained as follows.

Support the network configuration of mobile IP to comprise local agent, strange land agency and mobile subscriber station.

For the operation of mobile IP, require following function.

1) agent discovery

Agent discovery is a kind of current method that is connected to its local network or is positioned at the strange land network of mobile subscriber station of judging.By this method, mobile subscriber station can detect it and moved forward in another network.

2) registration

The function of registration provides a kind of mechanism flexibly, allows to detect under its situation of moving another network at mobile subscriber station, gives the mode of local agent to transmit current location information, and the service that provides on the local network is provided to former state on new network.

3) route

Be linked at mobile subscriber station under the situation of an external network, need routing function that want data packets for transmission correctly is routed to this mobile subscriber station, or come from this mobile subscriber station route.

4) Care-of Address (CoA)

Mobile IP provides two kinds of methods: strange land agency (FA)-CoA and be positioned at CoA jointly is used for setting up Care-of Address under mobile node has moved forward into the situation of another subnet.

FA-CoA is provided via agent advertisement message by the strange land agency, and wherein strange land agency's IP address is as Care-of Address.At the CoA that is arranged in jointly, Care-of Address is given mobile node via the DHCP that is arranged on the strange land network (DHCP) server-assignment.

Mobile IP v 6 is explained as follows.

Mobile IP v 6 is supported mobility more effectively than mobile IPv 4, and has than mobile IPv 4 better extensibility.The fundamental and the functional interpretation that are used for the mobile IP v 6 operation are as follows.

1) mobile node (MN): the main frame or the router that change its access to netwoks.

2) corresponding node (CN): main frame of communicating by letter or router with mobile subscriber station.

3) local agent (HA): the router of log-on message among the router in local network, that have mobile subscriber station, to send the current location of packet to the mobile subscriber station on the network externally.

4) Care-of Address (CoA): Internet protocol (IP) address that is connected with the mobile subscriber station that moves forward into external network.

5) binding: will by mobile subscriber station register CoA to local agent, with the local address coupling of corresponding mobile subscriber station together.

6) binding update (BU): use by mobile subscriber station, to notify its CoA to HA and CN.

7) (BACK) confirmed in binding: to the response message of BU.

8) binding request (BR): corresponding mobile subscriber station can not receive under the situation of BU before the timer expiration of the Binding information of mobile subscriber station, is used to ask the message of BU.

9) CoA obtains; Can when switching, use mobile subscriber station the positional information that neighbours find and the automatic configuration feature in address automatically disposes.

10) router optimization: after storing Binding information, corresponding mobile subscriber station need not local agent and can directly communicate by letter with mobile node.

11) address disposes automatically

The automatic generation of IP address is classified as the state that is used to use such as the DHCP address acquisition of server and keeps type address to dispose automatically and be used for being disposed automatically by the non-state address of the address of master side generation its oneself.In the method for using server, if master side from the Dynamic Host Configuration Protocol server request address, then distributes to master side by Dynamic Host Configuration Protocol server with one in the available address.In non-Status Type address automatically in the configuration, the address is to generate in the mode that prefix information that obtains with its interface id information with from router or known prefix information bundle.

FMIPv6 (being used for the quick switching of mobile IP v 6) is explained as follows.

At first, FMIPv6 is based on the switching estimated information in the layer 2, is undertaken by motion detection and NCoA (new Care-of Address) are obtained fast, is reduced in the agreement of the whole switching delay in the layer 3.The fundamental and the message that are used for the FMIPv6 operation are explained in the following description.

1) PAR (previous access router): the default router before mobile node switches.

2) NAR (new access router): the default router of when mobile node switches, estimating.

3) PCoA (previous Care-of Address): effective CoA of mobile node in the PAR subnet.

4) NCoA (new Care-of Address): effective CoA of the mobile node in the NAR subnet.

5) RtSolPr (router solicitation that is used to act on behalf of):, make request for potential handover information via the message that sends to PAR from mobile node.

6) PrRtAdv (agent router advertisement): via the message that sends to mobile node from PAR, be provided for the information of contiguous link, and as being used for the triggering signal that network startup switches.

7) FBU (binding update fast): mobile node request PAR changes into its traffic carrying capacity receiving position the message of NAR.

8) FBACK (binding is confirmed fast): for the response message of the FBU that produces from PAR.

9) HI (switch and start): send to the message that NAR switches with the expression mobile node from PAR.

10) HACK (switch and confirm):, send to the message of PAR from NAR in response to HI.

11) FNA (neighbours' advertisement fast): send to NAR from mobile node and confirm the message that NCoA uses, and, visit new network still failing to receive under the situation of FBACK with the expression mobile node.

The MIH function is set at below the IP layer, and uses trigger event and from the input value of the second layer (layer 2), such as information of other networks or the like, conveniently carries out handoff process.The MIH function can comprise the input value based on subscriber policy and configuration, and it can be influential to handoff procedure, and conventional interface is limited at MIH function and the 3rd layer (layer 3) entity, between mobile IP and SIP.These interfaces provide relevant ground floor (layer 1) (physical layer), the second layer (layer 2) (MAC layer) and mobility information of managing, and MIH obtains the information of relevant lower floor and network by means of incident and information service.

Upper management entity is set in the upper strata, monitoring and to be controlled at the state of the various links in the mobile subscriber station, and plays the effect of switching control function and Equipment Management Function.In this case, switching control function and Equipment Management Function can be provided with independently and respectively.Alternatively, can comprise this two kinds of functions together, with as upper management entity.

Fig. 2 is mobile subscriber station and the functional entity of network and the schematic diagram of host-host protocol with MIH function, and wherein dotted line is represented fundamental, Event triggered signal or the like.

For quick switching, network layer need use the information from link layer to connect to rebuild as quickly as possible.Link layer event helps moving of estimating user, and can help mobile subscriber station and network to go to prepare in advance switching.

The trigger that is used to switch can be begun by physics (PHY) layer and MAC layer (MAC).The starting point of this trigger can be local stack or remote stack.The block diagram of the trigger model that Fig. 3 is.

Event trigger provides the state of current demand signal, the state variation of another network and the variation of estimating, and be provided at the variation between physical layer and the MAC layer and the attribute change of particular network.

Event type can be divided into PHY layer incident, MAC layer incident, Admin Events, L3 incident, application affairs or the like.

Basic trigger event is explained as follows.At first, setting up under the situation of layer 2 connection on the particular link interface, and under the situation that the L3 packet can transmit from the upper strata, occurring " Link_Up ".In this case, judge: all L2 configurations of disposing this link are finished.And event source is local mac and remote mac.The parameter of " Link_Up " is shown in the table 1.

[table 1]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From wherein producing the source of incident

EventDestination	EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	MAC?Address	The MAC Address of MSS
MacOldAccessRouter	MAC?Address	The MAC Address of old access router
			MacNewAccessRouter	MAC?Address	The MAC Address of new access router
NetworkIdentifier	Media?Specific	Spendable network identifier when detecting the variation of subnet

Under the situation that discharges the L2 connection on the special purpose interface and at it, can not transmit under the situation of L3 packet, occur " Link_Down ".And event source is a local mac.The parameter of " LinkDown " is shown in the table 2.

[table 2]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From wherein producing the source of incident
EventDestination	EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	MAC?Address	The MAC Address of MSS
MacOldAccessRouter	MAC?Address	The MAC Address of old access router
			ReasonCode		Link is d/d reason why

Estimate that L2 connects will be in the specific time under the situation of link-down, occur " Link_Going_Down ".And " Link Going Down " can be the signal that is used for the initialization handoff procedure.Event source is " local mac " and " remote mac ".And the parameter of " Llnk_Going_Down " is shown in the table 3.

[table 3]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From wherein producing the source of incident
EventDestination	EVENT_XAYER_TYPE	Incident will send its destination to
			MacMobileTerrtiinal	MAC?Address	The MAC Address of MSS
MacOldAccessRouter	MAC?Address	The MAC Address of old access router
			MacNewAccessRouter	MAC?Address	The MAC Address of new access router

TimeInterval	Time?in?msecs	The estimated time of link-down
			ConfidenceLevel	％	The estimation rank of the Link_Down that is used for link in special time
UniqueEventIdentifier		Under the situation of generation incident counter-rotating, use

Estimate that L2 connects will be in the specific time under the situation of " connections ", appearance " Link_Going_UP ".And, take a long time at needs and use " Link Going Up " under the situation of initialization network.Event source is " local mac " and " remote mac ".And the parameter of " Link_Going_Up " is shown in the table 4.

[table 4]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From wherein producing the source of incident
EventDestination	EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	MAC?Address	The MAC Address of MSS
MacNewAccessRouter	MAC?Address	The MAC Address of new access router
			TimeInternal	Time?in?msecs	The estimated time that connects
ConfidencelLevel	％	The estimation rank of the Link_Up that is used for link in special time
			UniqueEventIdentifier		Under the situation of generation incident counter-rotating, use

" link event counter-rotating " is used in combination with " Link_Going_Up " or " Link_Going_Down ".Although it is to be transmitted at " Link_Going_Up " or " Link_Going_Down ", estimate in the specific time, not take place the triggering signal that occurs under the situation of " Link_Going_Up " or " Link_Going_Down ".Event source is " local mac " and " remote mac ".Table 5 illustrates the parameter of " Link_Event_Rollback ".

[table 5]

Title	Type	Explanation
			EventSource	?EVENT_LAYER_TYPE	From wherein producing the source of incident
EventDestination	?EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	?MAC?Address	The MAC Address of MSS

MacNewAccessRouter	?MAC?Address	The MAC Address of new access router
			UniqueEventIdentifier		Under the situation of generation incident counter-rotating, use

The new specific link of " Link_Available " expression is spendable or available." link is available " new base station of expression or accessing points can provide than by the base station of mobile subscriber station current accessed or the possibility of accessing points better link quality.Event source is " local mac " and " remote mac ".And the parameter of " Link_Available " is shown in the table 6.

[table 6]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From wherein producing the source of incident
EventDestination	EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	MAC?Address	The MAC Address of MSS
MacNewAccessRouter	MAC?Address	The MAC Address of new access router
			MacOldAccessRouter	MAC?Address	The MAC Address of old access router

" Link_Parameters_Change " is that a variation in the link parameter value exceeds the incident that occurs under the situation of specific limited.This can comprise link layer parameter, such as linear velocity, QoS (service quality), secret value or the like.Event source is " local mac " and " remote mac ".And the parameter of " Link_Parameters_Change " is shown in the table 7.

[table 7]

Title	Type	Explanation
			EventSource	?EVENT_LAYER_PYPE	From the source that incident wherein produces
EventDestination	?EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	?MAC?Address	The MAC Address of MSS
MacAccessRouter	?MAC?Address	The MAC Address of current access router
			oldValueOfLinkParameter		The old value of link parameter
newValueOfLinkParameter		The new value of link parameter

" MIH_Scan " be one in a order that the vicinity of being found the current accessed network by the upper strata is anti-to be used when asking.If addressable network of upper layer entity request scanning should " MIH_Scan " be generated.If several links are requested, a plurality of Link_Scan orders can be from the medium scan request information of various kinds.

MIH_Handover_Initiate.request is the fundamental that is used by upper layer entity, switches the intention that starts to transmit between the MIH of the MIH of mobile subscriber station function and network function.

MIH_Handover_Initiate.response is according to the situation of the link of response MIH_Handover_Initiate.request request, represents the fundamental of corresponding information by selecting preferable link.

MIH_Handover_Commit.request message is by notifying previous accessing points switching substantially for the link startup of selecting, and the data that are used to start send to mobile subscriber station via previous accessing points are carried out buffer memory.

MIH_Handover_Commit.response message is the response message to the MIH_Handover_Commit.request message that is used to represent handover success or failure.

Fig. 4 be demonstration because by the deterioration of the link of mobile subscriber station current accessed, the schematic diagram of the triggering signal of appearance before new link generates.

Information service is that network is provided as the network discovery and selects necessary details, and should be by the access to netwoks of any kind of.This information service will comprise information element, such as cost of links and accesses parameter, security mechanism, neighbours' mapping, location, ISP and other visit information, link or the like.

The detailed operating procedure of mobile IPv 4 is explained as follows.

At first, the elementary object of mobile IPv 4 is to support the transparent mobility in upper strata, and needs mobile host, local agent and strange land agency's additional function.But under the situation of not using path optimization, the change of the corresponding node of communicating by letter with mobile subscriber station is unnecessary.In this case, mobile host is represented the IP main frame by the mobility support.Local agent is to keep positional information that is used for mobile host and the router of carrying out open tunnel.And the strange land agency refers to the router of supporting mobility in the network of strange land.

Elemental motion in mobile IPv 4 can be explained as shown in Figure 5.

The action interpretation of each step is as follows in Fig. 5.

(1) move forward under the situation of strange land network from its local network at mobile host, this mobile host is broadcasted and is identified it and be moved by receive an advertisement information from this strange land network, then, the temporary address (CoA) with its current location of expression is registered to local agent in local network.

(2) in this case, CoA is strange land agency's IP address (FA-CoA), is perhaps distributed to the address of mobile host via DHCP or the like by the strange land network.The packet that sends to mobile host from the outside is transmitted to local network, and these packets are obtained by recognizing the local agent that mobile subscriber station moves.

(3) local agent by with the address of FA as the destination, the packet that sends mobile host to is encapsulated, then it is sent to the strange land agency.

(4) encapsulated data packet of Chuan Songing is acted on behalf of decapsulation by the strange land and is reverted to initial transmission packet, and finally sends mobile host then to.

(5) packet that sends corresponding main frame to from mobile host can directly transmit via the strange land agency, perhaps can use the reverse tunnel transmission under the situation that enters filtrations (ingress filtering) problem.

For the necessary major function of mobile IP is explained as follows.

1) agent discovery

Agent discovery is a kind ofly to judge that mobile subscriber station is currently connected to its local network or is positioned at the method for outside network.By this method, mobile subscriber station can detect it and moved forward in another network.

Mobile IP has expanded conventional ICMP (Internet Control Message Protocol) router and has found [IETFRFC1256].Agent advertisement message by periodically broadcasting of agency (local agent, strange land agency) is made in the mobility agent advertisement extension that comprises in the ICMP router advertisement message that will transmit.Find that by mobile subscriber station being used to of transmitting " agent solicitation " message of acting on behalf of used " ICMP router solicitation " method that message is identical with routine.

2) registration

The function of registration provides a kind of mechanism flexibly, allows to detect under its situation of moving another network at mobile subscriber station, gives the mode of local agent to transmit current location information, and former state the service that provides on the local network is provided on new network.Mobile IP has defined two different registration processes.Under the situation of using FA-CoA, mobile subscriber station will be registered via the strange land agency.Using under the CoA situation that is positioned at jointly, mobile subscriber station is directly registered local agent.

3) route

Be linked at mobile subscriber station under the situation of an external network, need to connect routing function in case with the route data packets that will transmit correct be routed to this mobile subscriber station or from its route.This packet comprises multicast and broadcast packe and unicast packet.

Fig. 6 is the schematic diagram that is used to explain the basic operation of mobile IP v 6 according to correlation technique.

At first, the operating procedure of mobile IP v 6 can sequentially be explained in Fig. 6.

0.MN leave from subnet A and to enter within the subnet B

1.MN use the prefix information of RA message and NUD (detection that vicinity can not obtain) mechanism to detect mobile.

2. obtain CoA individually via " address disposes automatically "

3. send BU message, notify the CoA of this acquisition to HA

4.HA local address and the CoA of MN are bundled, send BAck in response to BU then.

5. because can not detect moving of MN, at first the CN that communicates by letter with MN sends packet to the local address of MN by destination-address is set.

6. the HA of management MN intercepts this packet its open tunnel is given the current location of MN.

7. the MN that has received the grouping of open tunnel judges that CH does not have Binding information, by sending BU message to this CN, notifies its CoA to CN then.

8. after storing this Binding information, CN uses this information directly to communicate by letter with MN.

Fig. 7 and Fig. 8 are the schematic diagrames that is used to explain the operating process of FMIPv6.Fig. 7 is illustrated in the operating procedure under " proactive " pattern, and Fig. 8 is illustrated in the operating procedure under " reactive " pattern.Exist and to be used to send FBU/FBACK message back/come in " proactive " pattern of PAR link be used to send FBU/FBACK message back/come in " reactive " of NAR link pattern.Under the situation of " proactive " pattern, discharge with being connected of PAR before, the certainty of examination generation NCoA.Under the situation of " reactive " pattern, after mobile node has arrived new subnet, check the certainty of NCoA.

The operating procedure of " proactive " is explained as follows with reference to figure 7.

1) mobile node is found to can be used for switching AP based on L2 layer information (for example, scanning in wireless local area network (WLAN) system), send then RtSolPr message to PAR to obtain subnet information corresponding to the AP identifier of being found.

2) PAR that has received RtSolPr message will be placed in the byte group with [AP-ID, AR-Info] form corresponding to the subnet information of this AP, then PrRtAdv message is sent to mobile node.This message can be sent " imploring (solicit) " occasionally after mobile node is carried out router detection.

3) mobile node is created new Care-of Address (NCoA) based on the AR-Info in PrRtAdv message.

4) mobile node sends FB message, and this FB message request PAR bundles PCoA and NCoA, makes the packet that obtains at PAR to give NAR by open tunnel.

5) PAR sends and represents that mobile node will switch the notification message to NAR, that is, and and HI.Received the overlapping inspection of the NAR execution of HI message for the NCoA that creates by mobile node.The result who checks represents that NCoA is unfavorable if overlap, and then this NAR reconfigures CoA for this mobile node.

6) NAR will send to PAR as the HACK of the response message that is used for HI.In this case, can comprise the NCoA that generates recently.

7) PAR that has received HACK sends FBACK to mobile node and NAR, and notice PAR will start the packet open tunnel of the mobile node NCoA address to reality.In this case, the connection between mobile node and PAR is released.

8) packet that has obtained at PAR is sent to NAR.

9) in a single day set up the new link that arrives NAR, this mobile node sends FNA message to NAR.Therefore, to its notice: this mobile node oneself is connected to the network of NAR.

10) transmit this packet via NAR.

And the operating procedure of " reactive mode " is explained as follows with reference to figure 8.

1) mobile node is found the AP can be used for switching based on L2 layer information (for example, scanning) in wireless local area network (WLAN) system, send then RtSolPr message to PAR to obtain subnet information corresponding to the AP identifier of being found.

2) PAR that has received RtSolPr message will be placed in the byte group with [AP-ID, AR-Info] form corresponding to the subnet information of AP, then PrRtAdv message is sent to mobile node.This message can be sent " imploring " occasionally after mobile node is carried out router detection.

4) in a single day be connected to NAR, mobile node starts the process that the packet that will obtain sends to NAR in the mode of encapsulation FBU message in FNA message immediately.And mobile node makes NAR check whether this NCoA is effective.

5) NAR send FB message to PAR so that PCoA and NCoA are bundled.If NCoA is not that effectively NAR abandons the FBU packet in the FBU that is received by NAR, and is sent in the router advertisement that wherein has the replacement address.

6) PAR will send to NAR as the FBACK of the response message of FBU.In this case, between the PAR of reality and NAR, finished tunnel foundation.

7) the packet relaying that will arrive PAR is given NAR.

8) transmit this packet via NAR.

But as what mention in above description, this correlation technique has following problem.

At first, L2 handoff procedure and L3 handoff procedure are to produce independently under the situation of using MIPv4, MIPv6 or FMIPv6.That is, L3 switches realization after the L2 switching has been finished.Therefore, the corresponding delay occurs.

Secondly, if the network that known L2 switches directly will be used for the message that L3 switches, L3 does not know this point.Therefore, need the unnecessary messages transmission.

The 3rd, medium independently the field that is suitable for for the present invention of the communication between the switching entity be under the available situation, when between similar network, realizing switching, may not make any change and use when reconfiguring in the IP address.

Summary of the invention

Therefore, the present invention proposes a kind of method that reconfigures the IP address between different types of network when switching, and it has been eliminated basically because the limitation and the caused one or more problems of shortcoming of correlation technique.

An object of the present invention is to provide a kind of in mobile radio system the method for exchange message.

Another object of the present invention provide a kind of in mobile radio system the method from the visual angle exchange message of portable terminal.

To set forth extra advantage of the present invention, purpose and characteristics to a certain extent in the following description, when consulting following content or can learn from the practice of the present invention, will become apparent for those this areas those skilled in the art to a certain extent.Structure by especially pointing out in the specification of book and claim herein and appended accompanying drawing can realize and obtain purpose of the present invention and other advantage.

In order to realize these purposes and other advantage, with according to purpose of the present invention, as implementing herein and describing widely, a kind of in mobile radio system the method for exchange message, comprise: a network, be used for setting up switching management module, and handoff request message sent to the switching management module of objective network from the switching management module of information source network at information source network and objective network.In addition, this network is used to receive the switching response message from the switching management module of objective network to the switching management module of information source network, wherein switching response message comprises internet protocol address information, and send switch acknowledgment message to portable terminal from the switching management module of information source network, wherein switch acknowledgment message comprises internet protocol address information.

In another aspect of the present invention, a kind of in mobile radio system the method for exchange message, comprise: portable terminal is used for setting up the network handover module at portable terminal, be used for from being converted into unified expression with similar information with at least one at least one relevant Network Interface Module different types of network, the apply for information of the message that the request internet protocol address is relevant sends the information server of network to from portable terminal, receive inquiry response messages with the information server from network, it comprises the internet protocol address information of objective network.

Should be understood that above general introduction and following detailed description of the present invention are exemplary and illustrative, and be intended to the invention provides further instruction as claim.

Description of drawings

This accompanying drawing of following is included to provide further to be understood the present invention, and is incorporated into and constitutes the part of the application's book, and it illustrates embodiments of the invention, and can work to explain the principle of the invention with this specification.In the accompanying drawings:

Fig. 1 is the schematic diagram according to the protocol architecture of the multi-mode mobile subscriber station of correlation technique;

Fig. 2 is mobile subscriber station and the functional entity of network and the schematic diagram of host-host protocol that has the MIH function according to correlation technique;

Fig. 3 is the trigger structure of models figure according to correlation technique;

Fig. 4 be demonstration according to correlation technique because by the deterioration of the link of mobile subscriber station current accessed, the schematic diagram of the triggering signal of appearance before new link generates;

Fig. 5 is the schematic diagram that is used to explain the basic operation of mobile IPv 4 according to correlation technique;

Fig. 6 is the schematic diagram that is used to explain the basic operation of mobile IP v 6 according to correlation technique;

Fig. 7 and Fig. 8 are the schematic diagrames that is used to explain the operating process of FMIPv6 according to correlation technique;

Fig. 9 is the flow chart according to a preferred embodiment of the invention;

Figure 10 is the flow chart according to another preferred embodiment of the present invention;

Figure 11 is the flow chart according to another preferred embodiment of the present invention;

Figure 12 is the flow chart according to another preferred embodiment of the present invention;

Figure 13 is the flow chart according to another preferred embodiment of the present invention;

Figure 14 is the flow chart according to another preferred embodiment of the present invention;

Figure 15 is the flow chart according to another preferred embodiment of the present invention;

Figure 16 is the flow chart according to another preferred embodiment of the present invention;

Figure 17 is the flow chart according to another preferred embodiment of the present invention;

Figure 18 is the flow chart according to another preferred embodiment of the present invention;

Figure 19 is the flow chart according to another preferred embodiment of the present invention;

Figure 20 is the flow chart according to another preferred embodiment of the present invention;

Figure 21 is the flow chart according to another preferred embodiment of the present invention;

Figure 22 is the flow chart according to another preferred embodiment of the present invention;

Figure 23 is the flow chart according to another preferred embodiment of the present invention;

Figure 24 is the flow chart according to another preferred embodiment of the present invention;

Figure 25 is the flow chart according to another preferred embodiment of the present invention;

Figure 26 is the flow chart according to another preferred embodiment of the present invention;

Figure 27 is the flow chart according to another preferred embodiment of the present invention;

Figure 28 is the flow chart according to another preferred embodiment of the present invention; With

Figure 29 is the flow chart according to another preferred embodiment of the present invention.

Embodiment

To at length be introduced the preferred embodiments of the present invention now, the accompanying drawing illustrated that its example is being followed.As possible, run through the identical reference number of this accompanying drawing and will be used to relate to identical or similar part.

At first, explain the fundamental that can be used for IP address relocation method when between different types of network, switching hereinafter, and be used for when receiving data, data being sent to the fundamental of the new point of contact that is used for service continuity when between different types of network, switching according to the present invention.

And the fundamental that is proposed by the present invention can be used for obtaining new access router information, to obtain new IP address from information server.

In addition, term mobile subscriber station (MSS) can be called portable terminal, mobile node, mobile radio station and similar.

In addition, the data that send between access router of explaining via embodiments of the invention formerly and the new access router are to be suitable between old point of contact and new point of contact via the exchange of the fundamental that proposes by the present invention equally.

1)Inter_MIH.query

This fundamental be one at point of contact (broadband wireless access network base station, wireless local area network AP or cellular system base station) between the MIH signaling message, it is the message that is used to switch by old point of contact (PoA) transmission of mobile subscriber station, (for example be used for new point of contact (PoA) with request, the access router address information, the variation that is used for access router exists or non-existent information, the FA address information, represent the information whether FA changes, perhaps available resource) information, the information that perhaps is used for mobile subscriber station, or send the message of old PoA to by new PoA, the information of the mobile subscriber station of the PoA that is used for request belonging to old.If this fundamental is by comprising that discriminator (for example, IP address, MAC address, ESN or the like) transmit, this discriminator can differentiate that trial hands to the mobile subscriber station of new PoA from old PoA, and then it can be to new PoA notice: specific mobile subscriber station will switch.

Table 8 illustrates the example of the data format of an Inter_MIH.query fundamental.

[table 8]

Title	Type	Explanation
			CommandSource	UPPER_LAYER_TYPE	Starting point from its starting command.This is certain form on upper strata normally, such as policy engine or L3 mobility agreement.Transmission, application or the like.
CommandDestination	MIH_LOCAL, MIH_REMOTE	This has stipulated the order destination, this destination can or local or long-range MIH function.
			CurrentLinkldentifier	Network ldentifier. Can be one of different 802 and Cellular networks.	The accesses network that this identification is current need send this order on this network.This is effective for the remote command that needs send to long-range MIHF only.This order sends then or at L2 or at the L3 place.
TransportLayer	TRANSPORT_L2 TRANSPORT_L3	This identification transport layer L2 or L3, this order thereon need be sent to long-range MIHF entity.This is effective for remote command only.
			QueryResourceList		The tabulation of the resource that will on the new network that proposes, inquire about.

2)Inter_MIH.response

This fundamental is a MIH signaling message between point of contact (broadband wireless access network base station, wireless local area network AP or cellular system base station), it is sent to the new PoA of mobile subscriber station from old PoA, perhaps send old PoA to, to receive Inter_MIH.query and it is responded from new PoA.Be used to notify under the situation that the switching of specific mobile subscriber station starts or the like purpose at Inter_MIH.query, this fundamental is as corresponding " affirmation ".

Table 9 illustrates the form of Inter_MIH.response fundamental.

[table 9]

Title	Type	Explanation
			CommandSource	UPPER_LAYER_TYPE	Starting point from its starting command.This is certain form on upper strata normally, such as policy engine or L3 mobility agreement.Transmission, application or the like.

CommandDestination	MIH_LOCAL, MIH_REMOTE	This specified command destination, this destination can or local or long-range MIH function.
			CurrentLinkldentifier	Network Identifier.Can be one of different802 and Cellularnetworks.	The accesses network that this identification is current need send order on this network.This is effective for the remote command that needs send to long-range MIHF only.This order sends then or at L2 or on L3.
TransportLayer	TRANSPORT_L2TRANSPORT_L3	This identification transport layer L2 or L3 need be on this transport layer L2 or L3 send to order long-range MIHF entity.This is effective for remote command only.
			ResourceStatus		Specify on new PoA whether requested resource is available.
QueryResourceList		The tabulation of in fact available resource on new network that proposes and new network PoA.

3)IP_Information.request

This fundamental is a MIH signaling message between point of contact (broadband wireless access network base station, wireless local area network AP or cellular system base station), its old PoA by mobile subscriber station sends new PoA to, with request access router address information (for example, be included in the information in the router advertisement), perhaps FA (strange land agency) address information (for example, be included in the agent advertisement information).Have at old PoA under the situation of the information that arrives access router, this access router is connected with new PoA or strange land agency that specific mobile subscriber station will move to, and then this old PoA can directly send this message to access router or strange land agency.

And this old PoA can notify to new PoA: specific mobile subscriber station will switch to new PoA via this message.

In addition, receive this PoA of this fundamental or strange land agency's MIH and it can be triggered to the upper strata.

Table 10 illustrates the example of the data format of an IP_Information.request fundamental.And mobile subscriber station can be asked this fundamental from new PoA.

[table 10]

Title	Type	Explanation
			EventSource	?EVENT_LAYER_TYPE	From the source that incident wherein produces
EventDestination	?EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTencdnal	?MAC?Address	The MAC Address of MSS
MacAccessRouter	?MAC?Address	The MAC Address of access router

New PoA MAC Address	MAC Address	The MAC Address of new PoA
			Home Address	IP Address	The local address of MSS
CoA	IP Address	Current interim IP address of using by MSS
			Old FA Address	IP Address	Under the situation of MIPv4, comprise this parameter.The IP address of old FA
Old Access Address	Router IP Address	Under the situation of MIPV6, comprise this parameter.
					The IP address of old access router

4)IP_Information.confirm

This fundamental is a MIH signaling message between point of contact (broadband wireless access network base station, wireless local area network AP or cellular system base station), and it is transmitted with the result to the new IP_Information.request of mobile subscriber station and responds.

This fundamental be by comprising the access router of asking by IP_Information.request address information (for example, be included in the information in the router advertisement), perhaps FA (strange land agency) address information (for example, be included in the agent advertisement information) transmits.

The time of " timestamp " expression encapsulation, the mobility agent advertisement extension of cashing with expression or the reliability of route-map.This time can be illustrated in the encapsulation duration afterwards of agent advertisement or router advertisement.Be transferred in this message under the situation of mobility management entity of mobile subscriber station, the purpose of this parameter is with following mode acquired information, promptly, the mobility management entity of this mobile subscriber station (for example, mobile IPv 4, mobile IP v 6, FMIPv6 or the like) agent advertisement or the router advertisement that comprise in this message are carried out decapsulation, and know how long before this information is received, need cost.And, can calculate the actual effectively useful life of this message by from the useful life of expression, deducting time difference by " timestamp " expression as the effective time of this message of agent advertisement or router advertisement parameter.

The example of the data format of IP_Information.confirm fundamental.

[table 11]

Title	Type	Explanation
			EventSource	?EVENT_LAYER_TYPE	From the source that incident wherein produces
EventDestination	?EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	?MAC?Address	The MAC Address of MSS

Mobility ManagementProtocol Support Type	Bitmap	The mobility management agreement that expression is supported by router is supported type 0: the MIPv4 (FA-CoA) 1 with FA: MIPv4 (CoA that is positioned at jointly) 2:MIPv63: the MIPv64:FMIPv65:HMIPv66:SIP7 with DHCPv6: reservation that does not have FA
			IP Address ChangeNotification	This field represents whether the current address need be changed when the IP address (comprising Care-of Address) of MSS moves to new PoA.
		0:IP address modification 1:IP address no change
			FA-CoA or RouterAddress	If this mobility management agreement supports that type is 0, comprise the FA address.If this mobility management agreement supports that type is 2, comprise router address.Only when being 0, IP address modification notice comprises.
MobilityAgentAdvertisementExtension		This parameter is only supported to be comprised when type is 0 at the mobility management agreement, and is the identical information that the content in the agent advertisement that is provided by FA is provided.And this parameter is only comprised (for example, CoA information, registration useful life, packaging information) when IP address modification notice is 0.

Router Information		This parameter is only supported to be comprised when type is 2 at the mobility management agreement, and is the identical information that the content in the router advertisement that is provided by the IPv6 router is provided.
					And this parameter is only comprised when IP address modification notice is 0.(for example, router address, state keep automatic configuration router useful life of type address or the like).

Home Address TimeStamp

IP Address

The temporal information of the local address of MSS when mobility agent advertisement extension or route-map (agent advertisement or router advertisement) are packed.In this message that will transmit, from the agency or router receives and the time point of the time point of storage and encapsulation between time difference.

5)IP_CoA.request

This fundamental is transmitted to the MIH of new PoA, so that after receiving IP_Information.request, request is to address information or " agent advertisement "/" router advertisement " message of its access router or FA.

Table 12 illustrates the example of the data format of an IP_CoA.request.

[table 12]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From the source that incident wherein produces
EventDestination	EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	MAC Address	The MAC Address of MSS
MacAccessRouter	MAC Address	The MAC Address of old access router
			Old FA Address	IP Address	Only under the situation of MIPv4, comprise this parameter.The IP address of old FA
Old Access RouterAddress	IP Address	Only under the situation of MIPv6, comprise this parameter.

6)IP_CoA.indication

After receiving IP_CoA.request, this fundamental is transmitted to the access router that is used for FA or its upper strata of MIH (medium independently switch), with address information or " agent advertisement "/" router advertisement " message of request to access router or FA.The IP_CoA.request of this reception can be transferred to the upper strata from this MIH pellucidly.In this case, this fundamental has the form identical with IP_CoA.request.

7)IP_CoA.response

After the upper strata of access router or FA has received IP_CoA.indication, transmit this fundamental in response to MIH.This fundamental comprises the address information of access router or FA, perhaps " agent advertisement "/" router advertisement " message.This parameter have with at form identical shown in the table 9.

8)IP_CoA.confirm

This fundamental is transmitted to the MIH of access router or FA, and with the address information with access router or FA, perhaps " agent advertisement "/" router advertisement " message sends to the MIH of new PoA.The data format of IP_CoA.confirm can be identical at the form shown in the table 9.

9)New_IP_Address_indication

The information (for example, agent advertisement/router advertisement message) that this MIH incident is used for being used for new CoA sends to the upper strata of mobile subscriber station from old CoA.This parameter can have with at form identical shown in the table 9.

10)IP_CoA_Info.indication

This fundamental is used for the old access router of mobile subscriber station or the MIH of FA, sends to its upper strata with the IP relevant information that will obtain from the new access router or the FA of mobile subscriber station.After receiving this fundamental, this upper strata offers mobile subscriber station with " agent router advertisement " message.This parameter can have with at form identical shown in the table 9.

11)Start_Data_Forwarding

Notified after new connection has been configured to the old PoA of mobile subscriber station by mobile subscriber station, the data that this fundamental is used to ask old access router to go to be sent to the mobile subscriber station direction send to new access router.

New PoA is notified: new connection configuration is finished.And these are notified to new access router.In this case, the new access router data that can ask old access router to go to be sent to the mobile subscriber station direction send to new access router.

In the data sending request that is used for mobile subscriber station that proposes via this message of the present invention with to serve that successional data send be under situation about carrying out between the point of contact, the MIH function of this point of contact can produce this data sending request via this message.

Table 13 illustrates the example of a Start_Data_Forwarding form.

[table 13]

Title	Type	Explanation
			CommandSource	?EVENT_LAYER_TYPE	From the source that incident wherein produces
CommandDestination	?EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	?MAC?Address	The MAC Address of MSS
MacOldAccessRouter	?MAC?Address	The MAC Address of old access router
			MacNewAccessRouter	?MAC?Address	The MAC Address of new access router
Networkldentifier	?Media?Specific	Spendable network identifier when detecting the variation of subnet

12)Start_Data_Transmission

This fundamental represents that the new PoA of mobile subscriber station has finished the link configuration new with mobile subscriber station to new access router notice, and access router can send data to this mobile subscriber station.This parameter can have with at form identical shown in the table 11.

Parameter is increased to the Link_Going_Down of routine and Link_Down, to be achieved as follows the purpose of the present invention of explanation.

13)Link_Going_Down

After its MAC layer receives Link_Going_Down, for the IP address information of the PoA that please look for novelty from current PoA, the MIH of mobile subscriber station comprises the MAC Address that is used for new PoA in Link_Going_Down.

Table 14 illustrates the example of the data format of a Link_Going_Down.

[table 14]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From the source that incident wherein produces
EventDestination	EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	MAC?Address	The MAC Address of MSS
MacOldAccessRouter	MAC?Address	The MAC Address of old access router
			MacNewAccessRouter	MAC?Address	The MAC Address of new access router
TimeInterval	Time?in?msecs	The estimated time that is used for the Link_Down of link
			ConfidenceLevel	％	The estimation rank of the Link_Down that is used for link in special time
UniqueEventIdentifier		Under the situation that the incident counter-rotating takes place, use
			New?PoA?MAC	MAC?Address	The MAC Address that is used for the new PoA of MSS

14)Link_Down

Increase newly to correlation technique Link_Down by the IP address with mobile subscriber station, the link layer of the old PoA of mobile subscriber station is notified to MIH with this.This MIH is long-range to send long-range Link_Down triggering signal to access router, FA, new access router or FA, the data that are sent to corresponding mobile subscriber station direction should be sent to the new access router or the FA of mobile subscriber station with request.

Table 15 illustrates the example of the data format of a Link_Down.

[table 15]

Title	Type	Explanation
			EventSource	EVENT_LAYER_TYPE	From the source that incident wherein produces
EventDestination	EVENT_LAYER_TYPE	Incident will send its destination to
			MacMobileTerminal	MAC?Address	The MAC Address of MSS
MacOldAccessRouter	MAC?Address	The MAC Address of old access router
			ReasonCode		Link is d/d reason why
Home?Address	IP?Address	The local address of MSS
			CoA	IP?Address	The new interim IP address of MSS

15)IP_No_Change

(for example supporting the mobility supported protocol, FMIPv6) access router is after the old PoA of mobile subscriber station or mobile subscriber station receives IP_Information.request, if mobile subscriber station can use old IP address on new PoA after finishing switching, this fundamental is used for for mobile subscriber station it being notified to its MIH.

Table 16 illustrates the example of the data format of an IP_No_Change.

[table 16]

16) information element

In the following description the POA_SUBNET_INFORMATIONIE related with the IP address configuration is defined as the information element that is stored in the information server, to transmit according to the request of being undertaken by mobile subscriber station.

The POA_SUBNET_INFORMATION information element is stored in the information server, and comprises the information that is used for the all-access router or acts on behalf of with the strange land that point of contact (PoA) links.Especially, this POA_SUBNET_INFORMATION information element comprises the map information of layer 2 and layer 3 address.

Under the situation of supporting IPv4, the information list that includes the strange land agency's (FA) that can exchange with current PoA IP address can be comprised.Under the situation of supporting IPv6, the information list that includes the IP address of access router (AR) can be comprised.

Can not use the information (access router address) that is included among the POA_SUBNET_INFORMATION to obtain under the situation of new IP address, mobile subscriber station can use the new access router address information of acquisition to the direct request of new router proposition for the IP address.

Table 17 illustrates the example of the data format of a POA_SUBNET_INFORMATION information element.

[table 17]

No.	The title of information element	Explanation	Expression	Length
					1	?Type_IE_POA_SUBNET?_INFORMATION	The information of the relevant subnet of supporting by PoA	IPv4 supports: the tabulation IPv6 of available FAIP address supports: the tabulation of available ARIP address	Variable
2	?Type_IE_POA_SUBNET?_INFORMATION	The information of relevant IP address configuration	FA address configuration information AR address configuration information	Variable

To explain in the following description according to being used to of proposing by the present invention and use the situation that mobile IPv 4 switches and use mobile IP v 6 or the operation of the method for FMIPv6 when switching with the situation that is similar to the former.

Fig. 9 is the flow chart according to a preferred embodiment of the invention.

Use MIPv4 or MIPv6 as the mobility supported protocol at mobile subscriber station, and use FA-CoA or non-Status Type address information as Care-of Address (CoA), if and be used for the FA-CoA of new PoA or non-Status Type address when switching to new PoA by under the situation of distributing from old PoA, the MAC Address that is used for new PoA obtains by information service.In description of the invention, this term " old " uses interchangeably with term " source point " and/or " previous ".

1) if quality of signals worsens, the previous link of mobile subscriber station sends Link_Going_Down to comprise upper management entity upper strata via MIH, and will comprise that new PoA sends old PoA to the Remote_Link_Going_Down of the address of old/previous PoA.In this case, the MIH of this mobile subscriber station triggers IP_Information.request being transmitted to old PoA, rather than transmits Remote_Link_Going_Down.This MIH obtains to be used for the information of available link layer by the link layer of command cycle scanning lower floor in advance, and has been indicated the tabulation of candidate's link layer by upper management entity, to safeguard corresponding information.

2) MIH of old PoA by with MIH exchange Inter_MIH.query and the Inter_MIH.response of new PoA, obtain existence or nonexistence that CoA (Care-of Address) changes.In addition, the MIH of old PoA plays to new PoA and prenotices the effect that specific mobile subscriber station will switch to new PoA via this message startup.Therefore, new PoA obtains to be the necessary additional information of the switching of specific mobile subscriber station by asking this information from old PoA.By this process, comprise the information source network of old POA and comprise that the objective network both of new POA can set up switching management module, it can comprise network handover module (for example, MIH), any one in mobility administration module/entity, user plane module/entity (UPE), mobile IP strange land agency and the access router.Here, old/previous strange land agency/access router that this information source network may further include, and objective network may further include new strange land agency/access router.More than the term of Shi Yonging is not limited to the description with respect to Fig. 9, and can run through the description of the invention use.

3) by IP_Information.request being sent to the MIH of new PoA, the MIH of old PoA is to be used for the access router address information of new PoA, and perhaps the form of the message of FA (strange land agency)/access router address information is asked.In other words, the switching management module of this information source network sends the request message be used to the switch switching management module to objective network.If known access router of mobile subscriber station or FA (strange land agency) are by handover access, old PoA directly transmits IP_Information.request and gives access router or FA.

4) when receiving IP_Information.request, the MIH of new PoA transmits the MIH that IP_CoA.request gives its access router or FA.Directly transmit under the situation of IP_Information.request to the MIH of access router or FA at the MIH of old PoA, present step is omitted.

5) MIH of this access router or FA transmits IP_CoA.indication and gives its upper strata.If IP_Information.request or IP_CoA.request are sent to the upper strata pellucidly, this fundamental has the form identical with IP_Information.request or IP_CoA.request.

6) upper strata of this access router or FA produces response to the IP_CoA.response that comprises address information or " agent advertisement/router advertisement " message.

7) MIH of this access router or FA produces the MIH of the response of the IP_CoA.confirm that comprises address information or " agent advertisement/router advertisement " message to new PoA.

8) MIH of the new PoA IP_Information.confirm message that comprises the IP address information by transmission responds to the MIH of old PoA.In order differently to handle, the switching management module of objective network sends for about the response message of the request message that the switches switching management module to the information source network.

9) MIH of old PoA will comprise that the New_IP_Address.indication of IP address information is triggered to the upper strata of MIH or mobile subscriber station.That is to say that the affirmation message that the switching management module of this information source network will be used to switch sends to portable terminal/mobile subscriber station, it comprises internet protocol address information.

10) set up layer 2 (L2) link with new PoA.

11)～12) the new link of this mobile subscriber station is triggered to the upper strata that comprises upper management entity with Link_Up, and Remote_Link_Up is triggered to the MIH of new PoA.In this case, disposed new connection if new PoA oneself recognizes via its MAC layer, the MAC layer of then new PoA can directly trigger this and give MIH.

13) upper strata of this mobile subscriber station is transmitted login request message and is given local agent.

14) local agent is made the response of " registration response " to the upper strata of mobile subscriber station.

Figure 10 is the flow chart according to another preferred embodiment of the present invention.

Use MIPv4 or MIPv6 as the mobility supported protocol at mobile subscriber station, with FA-CoA or non-Status Type address information as Care-of Address (CoA), if and be used for the FA-CoA of new PoA or non-Status Type address when switching to new PoA by under the situation of distributing from old PoA, the MAC Address that is used for new PoA does not obtain by information service.

1) if quality of signals worsens, the previous link of mobile subscriber station sends Link_Going_Down to comprise upper management entity upper strata via MIH, and sends Remote_Link_Going_Down to old PoA.

2) this mobile subscriber station is searched for available link by carrying out scanning process.

3) if as the new link of found that of scanning process, Link_Avaliable is triggered to the upper strata that comprises upper management entity via MIH.

4) the new link layer of this mobile subscriber station obtains to be used for the MAC Address of new PoA via the MAC layoutprocedure.

5)～6) the new link layer of this mobile subscriber station triggers Link_Going_Up to its upper management entity, and triggers the MIH of the Remote_Link_Going_Up of the MAC Address that comprises new PoA to old PoA.In this case, the MIH of this mobile subscriber station can trigger (transmission) IP_Information.request and give old PoA, rather than triggers Remote_Link_Going_Up.

7) MIH of old PoA by with MIH exchange Inter_MIH.query and the Inter_MIH.response of new PoA, obtain to exist or do not exist CoA (Care-of Address) to change.And the MIH of old PoA plays to new PoA and notifies specific mobile subscriber station to start the effect that switches to new PoA via this message in advance.Therefore, new PoA obtains to be the necessary additional information of the switching of specific mobile subscriber station by asking this information from old PoA.

8) by IP_Information.request being sent to the MIH of new PoA, the access router address information of the PoA that the MIH of old PoA please look for novelty, perhaps FA (strange land agency) address information.If mobile subscriber station has been known access router or FA (strange land agency) by handover access, then old PoA directly transmits IP_Information.request and gives access router or FA.

9) received IP_Information.request, the MIH of new PoA transmits the MIH that IP_CoA.request gives its access router or FA.Directly transmit under the situation of IP_Information.request to the MIH of access router or FA at the MIH of old PoA, present step is omitted.

10) MIH of this access router or FA transmits IP_CoA.indication and gives its upper strata.If IP_Information.request or IP_CoA.request are sent to the upper strata pellucidly, this fundamental has the form identical with IP_Information.request or IP_CoA.request.

11) upper strata of this access router or FA produces response to the IP_CoA.response that comprises address information or " agent advertisement/router advertisement " message.

12) MIH of this access router or FA makes the response of the IP_CoA.confirm that comprises address information or " agent advertisement/router advertisement " message to the MIH of new PoA.

13) MIH of new PoA makes the response of the IP_Information.confirm that comprises the IP address information to the MIH of old PoA.

14) MIH of old PoA will comprise that the New_IP_Address.indication of IP address information triggers the upper strata to MIH or mobile subscriber station.

15) set up layer 2 (L2) link with new PoA.

16)～17) the new link of this mobile subscriber station is triggered to the upper strata that comprises upper management entity with Link_Up, and Remote_Link_Up is triggered to the MIH of new PoA.

18) upper strata of this mobile subscriber station is transmitted login request message and is given local agent.

19) local agent produces the response of " registration response ".

Figure 11 is the flow chart according to another preferred embodiment of the present invention.

Use MIPv4 or MIPv6 as the mobility supported protocol at mobile subscriber station, under the situation as Care-of Address (CoA), the FA-CoA or the non-Status Type address that are used for new PoA are distributed from old PoA when switching to new PoA with FA-CoA or non-Status Type address information.

With reference to Figure 11, notified specific mobile subscriber station will switch to its new strange land agency or new access router in (5), new strange land agency transmits " agent advertisement " by tunnel (6) and gives mobile subscriber station (7) via old strange land agency.And new access router transmits " router advertisement " by tunnel (7) and gives mobile subscriber station (7) via old access router.In this case, old strange land agency or old access router provide it to mobile subscriber station by separating the tunnel.

In step: (1) " agency by agreement/router advertisement " is expressed, because old strange land agency or old access router relaying are transmitted next " agent advertisement " or " router advertisement ", rather than transmit its " agent advertisement " or " router advertisement ".

And remaining step of current embodiment is similar in the embodiment show in figure 9 to be explained.

Figure 12 is the flow chart according to another preferred embodiment of the present invention.

With reference to Figure 12, old strange land agency or old access router receive and keep information (1), (2) of contiguous strange land agency or access router.Can oneself periodically carry out this information and keep, perhaps can carry out this information and keep according to request aperiodicity ground.

Step (3), (4) and (5) are similar to step shown in Figure 9 (1) and (2).And the MIH of mobile subscriber station can trigger (transmission) IP_Information.request, rather than triggers Remote_Link_Going_Down.

The MIH of old PoA transmits IP_Information.request and gives the old strange land agency or the MIH of access router, with access router address information or FA (strange land agency) address information of the PoA that please look for novelty, specific mobile subscriber station will move and be connected to new PoA (6).

Corresponding fundamental is sent to the upper strata from MIH.In this case, this fundamental can be transmitted (7) pellucidly.Alternatively, this fundamental also can be transformed, for transmitting (7).

If the access router address information of the new PoA of request or FA address information are present in the information list that is kept by old strange land agency or access router, existing information is transmitted to mobile subscriber station (8).

Figure 13 is the flow chart according to another preferred embodiment of the present invention.

With reference to Figure 13, the old strange land agency or the MIH of access router transmit fundamental, and the address information of the strange land agency of the PoA that this fundamental please be looked for novelty or the transmission of access router should send the old strange land agency or the upper strata (8) of access router to.

The upper strata that has received this fundamental sends the information that transmits to mobile subscriber station (9).

Under the situation that the connection between mobile subscriber station and the old link still keeps, " register requirement " that this mobile subscriber station will be used to register via old link sends local agent (10) to.

Act on behalf of relaying to be transmitted to this login request message of local agent via new strange land.This local agent sends and is used to permit the response message that mobile subscriber station is registered to new strange land agency.After receiving this response message, new strange land agency keeps it to be triggered from PoA up to Link_Up, rather than sends it to mobile subscriber station (11) immediately.

This mobile subscriber station is carried out new layoutprocedure.In case this link is configured, notifies finish (13) of new link to this mobile subscriber station, and simultaneously it is notified to new PoA (long-range) (14).If new PoA is its oneself management and the link management state of mobile subscriber station.In this case, the step that link configuration is notified to " long-range " can be omitted.

When Link_Up was transmitted to the MIH of new PoA and upper strata, how the discriminator of this mobile subscriber station connected if being transmitted together with the expression mobile subscriber station.The MIH of new PoA notifies to new strange land agency or access router: the link of this mobile subscriber station is configured (15).

Because the link configuration of new strange land agency or access router are notified specific mobile subscriber station is finished, new strange land agency or access router send " registration is replied ", should " registration is replied " expression by the corresponding mobile subscriber station via the registration step that old link sends to local agent achieve success (16)." registration is replied " sent by local agent.When strange land agency or access router are transmitted rather than it is handled in the notice with Link_Up, play effect.

Figure 14 is the flow chart according to another preferred embodiment of the present invention.

With reference to Figure 14, in address information owing to can not be sent under the situation of mobile subscriber station from the reason that old PoA discharges or the like such as link, in case be configured (10) with the link of new PoA, new PoA transmits the address information (agent advertisement or router advertisement) (11) that is received and kept by new PoA.In this case, if the link layer of new PoA recognizes the new connection that is used for oneself, link configuration information can directly be notified to its MIH.

Figure 15 is the flow chart according to another preferred embodiment of the present invention.

With reference to Figure 15, owing to can not send under the situation of mobile subscriber station from the reason that old PoA discharges or the like such as link, new PoA is to new strange land agency or access router notice in address information: be configured (10), (11) and (12) with the link of new PoA.In case the link of the new PoA of mobile subscriber station is configured, new strange land agency or access router transfer address information (agent advertisement or router advertisement) (13).

Figure 16 is the flow chart according to another preferred embodiment of the present invention, has wherein used FMIPv6 (when transmitting Link_Going_Down, the PoA address of another style interface of switching is known).

(1) state that it is found that the link of current accessed descends.And the Link_Going_Down triggering signal is transmitted to MIH and the upper strata that needs this information.

(2) represent that information that this link is descending is transmitted to the MIH layer of the PoA of current accessed equally.This message transmission can be used layer 2 or use layer 3 or higher execution via the link of current accessed.This information comprises the address of the PoA (point of contact) of visit recently.The address of new PoA can obtain via information service or contiguous broadcasting in advance.The link layer respectively implementation cycle property scanning of this MIH by ordering lower floor in advance obtains to be used for the information of available link layer, and by the tabulation of candidate's link layer of upper management entity indication to safeguard corresponding information.

(3) MIH of the PoA of current accessed uses the address of the new PoA that is carried by Link_Going_Down, by and the MIH exchange message (inquiry and response between MIH) of new PoA obtain the network location information of new PoA.In this case, the MIH of this mobile subscriber station can transmit IP_Information, and request gives current PoA, rather than transmits Link_Going_Down (unnecessary change IP address).New network location information provides the type of the mobility management agreement of the PoA use of being visited recently by mobile subscriber station, with under the situation of identical mobility management agreement according to the information of mobility management agreement, whether for example under the situation of MIPv4, represent the FA information identical, information that the access router that is connected to current PoA with expression and new PoA be whether identical or the like with current PoA.In this case, the information that is connected to the access router of new PoA can obtain equally.And the MIH of the PoA of current accessed plays to new PoA and notifies specific mobile subscriber station to start the effect that switches to new PoA via this message in advance.Therefore, new PoA request is from the necessary additional information of switching of old PoA acquisition for specific mobile subscriber station.

(4) use the IP information request to notify specific mobile subscriber station will move to the access router that is connected with new PoA to the access router of current PoA.This has the same effect that transmits RtSolPr (router solicitation trust) in FMIPv6 from mobile subscriber station.But,, therefore exist to be used for sending the effect that the message of RtSolPr can be omitted from mobile subscriber station because this network implementation triggers, rather than removes to transmit RtSolPr by the mobile subscriber station that obtains its migration existence or nonexistence.

(5) triggering signal of the access router of current accessed by sending from MIH, transmission is used for the PrRtrAdv (agent router advertisement) of the access router of new PoA.Through thus, PrRtrAdv can transmit quickly than the RtSolPr of mobile subscriber station.

(6) the multi-mode mobile subscriber station is via new " Care-of Address (CoA) " of PrRtrAdv configuration that transmits, and it can be used by the new access router that is connected to new PoA.

(7), (8), (9), (10), (11) multi-mode mobile subscriber station and access router are carried out the step that is used for FMIPv6.

(12) configuration is equal to or less than the link of the layer 2 with new link.

(13) send to the upper strata via MIH: the L3 packet can be sent out, and finishes because have the configuration of new link.If this triggering signal is transmitted, the mobility management entity transmits FNA (neighbor advertisement fast) immediately.The new access router that has received FNA sends the packet that transmits to mobile subscriber station.

(14) in case execution in step (13), to the MIH of old PoA notice: the link with new PoA is configured.

(15) MIH of this access router triggers: recognized that with new PoA this put completed MIH and should give the access router that is connected to new PoA with data forwarding.Through thus, it can know fully when old access router will transmit these data.The MIH that a result of the present invention is this access router sends these data by the intercommunication mutually between the MIH of the MIH of old PoA and access router by knowing that correct time is put to order.And this correct time point can be different from shown in the embodiment that provides that.

(16) data are transferred to the new access router of new PoA by the old access router from old PoA.

(17) Remote triggering that has been configured of the new link of expression is forwarded to the MIH of the PoA of new link.This step appears on the time point that is similar to step (13).In this case, if recognize and be used for its oneself new link configuration, the link layer of then new PoA can directly be notified this new link configuration to its MIH.

(18) MIH of this new PoA notifies to the MIH of the access router that is connected to new PoA: because the configuration of the new link of mobile subscriber station, data can be transmitted via the MIH exchange with access router.

(19) notify its old link to be released.After the configuration of new link is terminated, can realize this step by order MIH.Alternatively, this step takes place after new link configuration just, but can be kept preset time, to be used for and new link duplex.

(20) access router of the new PoA that is triggered by step (18) does not lingeringly send data to mobile subscriber station rapidly.

Figure 17 is the flow chart according to another preferred embodiment of the present invention, has wherein used FMIPv6 (when transmitting Link_Going_Up, obtaining the PoA address of another style interface of switching).

With reference to Figure 17, being different from the PoA address of another style interface that switches under the situation of using FMIPvS is the situation of having known when transmitting Link_Going_Down, current embodiment is corresponding to a kind of situation, the address of new PoA is known in the process of the network retrieval of new PoA, does not perhaps know this information (5) when " link decline " by means of the link configuration step of new PoA.

The MIH link of notifying old PoA is with Remote configuration (7).

And remaining step is similar to those among the embodiment before shown in Figure 16.

Figure 18 is the flow chart according to another preferred embodiment of the present invention, wherein under the situation of using FMIPv6, has in configuration before the link of new PoA, and the link with old PoA is disconnected.

With reference to Figure 18, the step of the embodiment of current use FMIPv6 is similar to those of embodiment before shown in Figure 16, and corresponding to a kind of situation, because reason such as migration of mobile subscriber station or the like, by means of new access router completing steps (1)～(11) afterwards, the step (12) that is connected to old link is disconnected.

In case be disconnected with old being connected of link, the MIH of this mobile subscriber station notifies this link to disconnect (13) from low link layer.

If old PoA manages the connection of mobile subscriber station, the connection that old PoA recognizes mobile subscriber station is released, and notifies the connection of specific mobile subscriber station to lose (14) to old access router then.

Being used to of being transmitted differentiates that the information of specific mobile subscriber station is to stand in old PoA by the mobile subscriber to go up the IP address of using or link layer address (for example, MAC Address), Electronic Serial Number (ESN) or the like.It is not in service that this information is included in the remote link that will transmit, and it is notified to old access router by old PoA.The packet (15) that the access router that has received this information transmits the d/d specific mobile subscriber station of this connection via the tunnel of setting up in advance.

And remaining step is similar to those that explain in Figure 16.

Figure 19 is the flow chart according to another preferred embodiment of the present invention, wherein under the situation of using FMIPv6, disposing by means of new PoA in the process of this link, after link was by the triggering signal configuration that sends the upper strata from MIH to, the packet of passing on from new PoA promptly was received.

With reference to Figure 19, the step of the embodiment of current use FMIPv6 is similar to those among the embodiment before shown in Fig. 16.By means of new access router completing steps (1)～(11) afterwards, execution has the layoutprocedure (12) of new link.

In case finish the link configuration with new PoA, notified to MIH by the link layer of mobile subscriber station: new link is configured.And these are transmitted to the upper strata (13) that comprises the mobility management entity.

Received the information that the new link of expression has been configured, this mobility management entity transmits " neighbor advertisement fast " immediately and gives new access router (17).

Receive " neighbor advertisement fast ", this access router sends the packet that receives to mobile subscriber station (18).

Step (14)～(16) relate to the request message that is sent to the switching management module of information source network by mobile subscriber station/mobile radio station, send to the switching management module of this objective network to order these data.After receiving request message, the switching management module of this information source network sends these data to according to request/order the switching management module of this objective network.At last, the data that the switching management module/entity of this objective network will transmit from the switching management module of information source network in step (18) send the initial point of request message to, that is, and and this portable terminal.

Figure 20 is the flow chart according to another preferred embodiment of the present invention, wherein under the situation of using FMIPv6, has in configuration before the link of new PoA, and the link with old PoA is disconnected.Among Figure 20, disposing by means of new PoA in the process of this link, after link is by the triggering signal configuration that sends the upper strata from MIH to, is receiving from new PoA and transmit the packet of coming fast.

With reference to Figure 20, under the situation of using FMIPv6 (1)～(6), according to those steps among the embodiment that was similar to before shown in Figure 16, new CoA is by generating by means of new access router execution in step.

Has the link of old PoA because the reason of regulation is disconnected (7).

Notify this link to be disconnected (8) from the link layer of mobile subscriber station to the upper strata via MIH.

This mobile subscriber station starts link configuration step and configuration link (9) by means of new PoA.

In case link configuration is finished, notify this link configuration to finish (10) to the upper strata that comprises the mobility management entity by the new link layer of mobile subscriber station.

This mobility management entity that has received corresponding notice sends " neighbor advertisement (binding update fast) fast " (11) immediately, makes that new access router can be by setting up data (12), (13) that the tunnel receives transmission with old access router.

After having set up the tunnel, old access router sends packet to new access router (14) via this tunnel.

And this new access router sends packet to mobile subscriber station (15).

Figure 21 is the flow chart according to another preferred embodiment of the present invention.

Use MIPv4 or MIPv6 as the mobility supported protocol at mobile subscriber station, with FA-CoA or non-Status Type address information under the situation as Care-of Address (CoA), expression need not to change current IP address, and the IP address of use is being that spendable information is to obtain from old PoA before attempting to switch to new PoA on the new PoA.

With reference to Figure 21, mobile subscriber station is triggered to old PoA (6) with Remote_Link_Going_Up.

Old PoA will be used to inquire about and can be moved subscriber station and send new PoA (7) to as the IP_Information.request of the IP information of new PoA.In this case, this IP_Information.request is by comprising that the IP address information of being used by old PoA transmits.

Information that new PoA relatively comprises in IP_Information.request and mobile subscriber station can be via switching the IP address (comprising interim IP address) of using.If old address is spendable, new PoA is that the mode of 1 (the IP address change is unnecessary) responds (8) so that " IP address change notice " field to be set in IP_Information.confirm message.

Old PoA receives IP_Information.confirm, sends it to this mobile subscriber station (9) then.

In current embodiment, response (IP_Information.confirm) for IP_Information.request is to be generated and transmitted by new PoA, it is corresponding to a kind of situation, that is, new PoA comes identifying information by listening to the router that is connected with this new PoA or strange land agency's advertisement.Alternatively, if there is the address information that to utilize, IP_Information.request is transmitted to an access router or strange land agency, makes this access router or strange land agency can respond IP_Information.request and sends IP_Information.confirm to new PoA.Therefore, this new PoA can send it to this mobile subscriber station.

Figure 22 is the flow chart according to another preferred embodiment of the present invention.

With reference to Figure 22, the step of current embodiment is similar to those among the embodiment before shown in Figure 10.

But mobile subscriber station transmits the IP_Information.request that is used to ask the IP address information that can use on new PoA, rather than Remote_Link_Going_Down is triggered (transmission) give old PoA (7).

In case received IP_Information.request, then the information that relatively in IP_Information.request, comprises of this new PoA with can be after switching by the IP address (comprising interim IP address) of mobile subscriber station use.If old address is out of use, and if the IP address need be changed, then this new PoA will comprise that via old PoA (12-13) IP_Information.confirm of IP address information sends mobile subscriber station to.

In current embodiment, because new PoA does not have the information that enough IP_Information.request is responded, then this information is to send the access router that is connected with new PoA or strange land to by the IP_CoA.request (IP_Information.request that perhaps is used for same effect) that will be used to ask the IP relevant information to act on behalf of and obtain.And this mobile subscriber stands in and comprises among the IP_Information.confirm that this information is to transmit.Alternatively, by listening under the situation that access router or strange land agent advertisement had the enough information relevant with IP, this new PoA can directly send corresponding information to mobile subscriber station.

Figure 23 is the flow chart according to another preferred embodiment of the present invention.

Use MIPv4 or MIPv6 as the mobility supported protocol at mobile subscriber station, with FA-CoA or non-Status Type address information under the situation as Care-of Address (CoA), the information that expression IP address information does not have to change is to obtain in following mode, promptly, before attempting to switch to new PoA, this mobile subscriber station sends the request of IP address information to new PoA via old PoA.

With reference to Figure 23, mobile subscriber station sends IP_Information.request to new PoA via old PoA (6-7).The information that new PoA relatively comprises in IP_Information.request with can be after switching by the IP address (comprising interim IP address) of mobile subscriber station use.If old address is spendable, new PoA is that the mode of 1 (the IP address change is unnecessary) responds (8) to old PoA by " IP address change notice " field is set in IP_Information.confirm message.

In case received this IP_Information.confirm message, old PoA sends it to this mobile subscriber station (9).

In current embodiment, new PoA generates and transmits the response (IP_Information.confirm) for IP_Information.request, it is corresponding to following situation, promptly by listening to the router that is connected with new PoA or strange land agency's advertisement, new PoA recognizes this information.But, if there is the relevant information in IP address that to utilize, IP_Information.request is transmitted to an access router or strange land agency, makes this access router or strange land agency can respond this IP_Information.request and sends IP_Information.confirm to new PoA.Therefore, this new PoA can send it to this mobile subscriber station.

Figure 24 is the flow chart according to another preferred embodiment of the present invention, is wherein using under the situation of FMIPv6, and the previous IP address of using of expression is that to need not to change spendable information be to obtain from old PoA with reference to the address information of using on new PoA.

With reference to Figure 24, mobile subscriber station triggers Remote_Link_Going_Down to old PoA (2).

Old PoA will be used to inquire about and can stand in the access router (3) that IP_Information.request that new PoA goes up the IP information of using sends a Geju City to by the mobile subscriber.

Just can use the previous I P address on new PoA if need not to change the previous I P address after this mobile subscriber stands in and switches, then this old access router sends IP_No_Change to its MIH (4).

The MIH of old access router " IP address notification " field in IP_Information.confirm message is set to 1 (the IP address modification is unnecessary), then this message is sent to old PoA (5).

And this old PoA gives mobile subscriber station (6) with this forwards.

Figure 25 is the flow chart according to another preferred embodiment of the present invention, and step wherein is similar to those among the embodiment before shown in Figure 16.With reference to Figure 25, mobile subscriber station is transmitted in new PoA and goes up the spendable IP_Information.request that is used to ask IP information, rather than triggers Remote_Link_Going_Down and give old PoA (2).

Received this IP_Information.request, this old PoA is transmitted to this old access router (3) with it.

This old access router is with reference to the new access router address that comprises in request message (4), and the agent advertisement message that will be used for new access router sends this mobile subscriber station to.

Figure 26 is the flow chart according to another preferred embodiment of the present invention, and step wherein is similar to those among the embodiment before shown in Figure 24.

With reference to Figure 26, mobile subscriber station transmits IP_Information.request, rather than Remote_Link_Going_Down is triggered (forwarding) give old PoA (2).

Figure 27 is the flow chart according to another preferred embodiment of the present invention, and step wherein is similar to those among the embodiment before shown in Figure 16.But, old access router via new PoA by with the exchange of new access router, obtain the IP address information of multi-mode mobile subscriber station, and data be transmitted to new access router via long-range connection from old access router.

With reference to Figure 26, the information that the state of the link of discovery expression current accessed descends.And link decline triggering signal is transmitted to MIH and upper strata (1) that needs this information.And, represent that information that this link is descending is transmitted to the MIH layer of the PoA of current accessed.This message transmission can be used layer 2 or use layer 3 or more high-rise execution via a link.This information comprises the address of the PoA (point of contact) of visit recently.The address of new PoA can obtain via information service or obtain via contiguous broadcasting in advance.This MIH obtains to be used for the information of available link layer by the link layer of command cycle scanning lower floor in advance, and the tabulation of having been indicated candidate's link layer by upper management entity is to safeguard corresponding information (2).

The MIH of the PoA of current accessed has obtained the network location information (3) of new PoA by the MIH exchange message (inquiry and response between MIH) of the next and new PoA in the address of using the new PoA that is carried by link decline.

The IP address information that the MIH of old PoA uses for mobile subscriber station after switching to new access router via the MIH request of new PoA.And the MIH of the PoA that this is old plays via this message and notifies specific mobile subscriber station will start the effect that switches to new PoA to new PoA.Therefore, this new PoA request obtains the necessary additional information of switching for specific mobile subscriber station from old PoA (4)～(7).

Address information is notified to old access router (8) via IP information response.

The anti-router of asking of current accessed receives the information of the access router that is used for new PoA, and the PrRtAdv (agent router advertisement) that will carry this information then sends this mobile subscriber station (9) to.

This multi-mode mobile subscriber station is via the PrRtAdv of this reception, and configuration can be by " new Care-of Address (NCoA) " (10) of the new access router use that is connected with this new PoA.

This multi-mode mobile subscriber station and access router are carried out the step that is used for FMIPv6 (11), (12), (13), (14), (15).

The link that is equal to or less than the layer 2 with new link is configured (16).

Guarantee to represent that in following mode this mobile subscriber station has switched to the information of new access router, the link configuration that promptly has a new link is notified to MIH (17)～(19) of new PoA and new access router via long-range connection and upper strata.

The MIH of new access router that has received long-range connection triggering signal is by sending to Start_Data_Forward old access router, the data that indication is transmitted from old access router.Realizing between two PoA that the MIH of new PoA can similarly indicate the data (20) of forwarding by Start_Data_Forward being sent to the MIH of old access router under the situation of transfer of data.

Packet is transmitted to new access router (21) from old access router.

Notify this old link to be disconnected.After having finished configuration, can carry out this step by order MIH with new link.

This step just in time takes place after the configuration of new link just.But this step can be kept preset time, to be used for the duplex (22) with this new link.

Finish in case known the link between mobile subscriber station and new PoA, then the access router of this new PoA sends the data of transmitting to multi-mode mobile subscriber station (23) without delay immediately.

Figure 28 is the flow chart according to another preferred embodiment of the present invention, wherein shows use and switches situation by the MIH rank of the order of the present invention's proposition.

With reference to Figure 28, the state of the link of the old link discovery current accessed of mobile subscriber station descends, and then the Link_Going_Down.indication triggering signal is sent to the MIH and upper strata (1) that need this information.

The available link scanning to this MIH is ordered via MIH_Scan in this upper strata.

The new link that can be used for switching is notified via Link_Available: its link can be used for switching (3).

By MIH_Handover_Initiate.request being sent to the MIH of old PoA, the MIH of this mobile subscriber station sends its intention of planning to switch to the available link of potential switching (4) via scanning.

Whether the MIH of old PoA is enough to the MIH of new PoA inquiry about the resource of the new link that proposes, and side by side notifies this mobile subscriber station will hand to corresponding PoA (5) via Inter_MIH.query to the MIH of new PoA.

The result (6) that the MIH of new PoA asks via Inter_MIH.query to the MIH of old PoA notice by Inter_MIH.response.

Old PoA switches available PoA based on the information that obtains via Inter_MIH.query and Inter_MIH.response to this mobile subscriber station notice.In this case, old PoA can select to represent to be different from the link (7) by the link of mobile subscriber station request.

For acquisition in advance is used for the IP address information of the link of this selection, this mobile subscriber station sends IP_Information.request to the MIH of new PoA.Alternatively, the MIH of the old PoA of the link of selecting via Inter_MIH.response can ask the new IP address (7) of this mobile subscriber station by directly IP_Information.request being sent to the MIH of new PoA.

MIH request and new IP address (8)～(12) that obtain this mobile subscriber station from the access router that is connected of PoA.

The MIH of new PoA sends the IP address that obtains to mobile subscriber station (13) via IP_Information.response.

This mobile subscriber station is notified the MIH (14) of old PoA by MIH_Handover_Commit.request being sent to the MIH of old PoA.

Old PoA response MIH_Handover_Commit.request sends MIH_Handover_Commit.response to this mobile subscriber station (15).

By transmitting the MIH that Link_Up gives new PoA for upper strata and teletransmission Link_Up, the new chain road direction mobile subscriber station notice of this mobile subscriber station is in achieve success aspect the new link configuration (16).

By Start_Data_Forward being sent to old access router, the MIH request of new PoA is transmitted to new PoA with data from old PoA.Therefore, packet is transmitted to new access router (17), (18) from old access router.Alternatively, the data forwarding request can realize that promptly new PoA request is used for the new access router of data forwarding and the new old access router of access router request in following mode.In data forwarding is under situation about realizing between the PoA, requires this data forwarding to transmit data in following mode, and promptly new PoA need not to ask this access router to transmit Start_Data_Forward and gives old PoA.

Figure 29 is the flow chart according to another preferred embodiment of the present invention, and wherein IP address pre-configured by pre-configured of use after switching used in the IP address via the information server that proposes by the present invention.

With reference to Figure 29, the old/source point of mobile subscriber station/previous link acquisition is represented the information that the state of the link of current accessed is descending, then the Link_Going_Down.indication triggering signal is sent to MIH and the upper strata that needs this information.This information is transmitted to old PoA then.In this case, the address (MAC Address or IP address) of the PoA of visit is included in (1) in the information that will transmit recently.

In case known the information that the link of this mobile subscriber station of expression is descending, will move to the address of its PoA with this mobile subscriber station, then old PoA is to the information server request and can stand in new PoA by the mobile subscriber and go up the relevant information of using (2) of IP address configuration.In other words, mobile subscriber station/portable terminal (is for example set up the network handover module, MIH), be used for from or at least one at least one relevant Network Interface Module similar or different types of network (for example, information MAC) is converted into unified expression.After this, this mobile subscriber station will ask the query messages of the relevant message in internet protocol address to send to the information server of network from this mobile subscriber station.

This information server sends the information relevant with the IP address configuration to the PoA (3) that carries out this request.This information relevant with the IP address is given this mobile subscriber station by relaying, with the upper strata (3) that is transmitted to this mobile subscriber station.In other words, this mobile subscriber station responds this inquiry request message response message of information server reception from this network, and it comprises the internet protocol address information of objective network.

Alternatively, another method that receives the IP address configuration information via information service corresponding to the MIH of mobile subscriber station directly from the method for the information server request and the information of reception.

The information (4) that this mobile subscriber station ask for information services device IP address is relevant.

The relevant information in mobile subscriber station request IP address that this information server can use on new PoA after being transmitted in and switching.This information is transmitted to the upper strata (5) of this mobile subscriber station then.

The upper strata of this mobile subscriber station, promptly relevant layer with the IP address configuration, for example IP layer or mobility consultative management layer transmit under the situation of IPv6 " router solicitation ", perhaps under the situation of mobile IPv 4, transmit " agent solicitation ", with configuration of IP address before switching.Should " router solicitation " or " agent solicitation " give access router or the strange land agency of current PoA, and be transmitted to access router on new PoA or strange land agency, to use (6) by clean culture or open tunnel.

This access router or the strange land agency that have received " router solicitation " or " agent solicitation " of mobile subscriber station transmit corresponding response to mobile subscriber station (7) by clean culture or open tunnel.

This mobile subscriber station is by means of new PoA configuration link (9).

MIH via this mobile subscriber station notifies new link to be configured (10) to the upper strata.

Because can transmit the grouping of IP layer data owing to the configuration of new link, so registration step (11), (12) are carried out by means of local agent in this upper strata.

As another IP address configuration method, there is a kind of method, mobile subscriber station obtains the Dynamic Host Configuration Protocol server address of new PoA via information server, and before mobile subscriber station begins to switch, by means of via old PoA with communicating by letter that Dynamic Host Configuration Protocol server carries out, distribute the IP address of using by new PoA.

Therefore, in the IP address relocation method when between different types of network, switching, go to switch, can avoid transmitting unnecessary message, and reduce the time that is used to switch cost via the exchange identification layer 2 (L2) between MIH by allowing layer 3 (L3).

Apparent for those skilled in the art, do not break away from spirit of the present invention or scope, can carry out various modifications and variations in the present invention.Therefore, this invention is intended to cover it improvement of the present invention and variation that is provided within appended claim and its equivalent scope is provided.

Claims

1. method of in mobile radio system, transmitting information, this method comprises:

The media independent handovers MIH module of mobile radio station sends the MIH module of Link_Going_Down information to old tie point PoA, and wherein said old PoA links to each other with old access router, and wherein said Link_Going_Down information comprises the address of the PoA that will newly be visited;

The MIH module of described old PoA is utilized the address of the entrained new PoA of described Link_Going_Down information, by with the MIH module exchange message of new PoA, obtain the network location information of new PoA, the network location information of wherein said new PoA comprises the information of the new access router that is connected with described new PoA;

The MIH module of described old PoA utilizes the IP information request will move to the new access router that is connected with new PoA to the old access router notice mobile subscriber station that is connected with described old PoA;

The triggering of the old access router that is connected with described old PoA by sending from MIH, the agent router advertisement that transmits the new access router that is used for new PoA;

The Care-of Address CoA that mobile radio station is new according to the agent router advertisement configuration, its new access router that will be connected to new PoA is used;

Mobile radio station starts the link configuration step and carries out link configuration by new PoA;

The new link layer of mobile radio station is finished to the upper strata of mobile radio station notice link configuration;

The upper strata of mobile radio station sends quick neighbor advertisement to new access router;

New access router is set up the tunnel by exchanging messages with old access router;

Old access router sends packet by the tunnel to new access router; And

New access router is transmitted packet and is given mobile radio station,

Wherein, described mobile radio station, described old PoA, described new PoA, described old access router and described new access router are different entities.

2. according to the process of claim 1 wherein that this mobile radio station is multimodal.

3. arrive the tension management module according to the process of claim 1 wherein that this MIH module is used to transmit come from the information of similar and at least one at least one relevant MIH module different types of network.

4. according to the process of claim 1 wherein that described access router is used for connecting website via industrial siding or common carrier.