CN102036228A - Method and system for realizing terminal handover - Google Patents
Method and system for realizing terminal handover Download PDFInfo
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- CN102036228A CN102036228A CN2009101764007A CN200910176400A CN102036228A CN 102036228 A CN102036228 A CN 102036228A CN 2009101764007 A CN2009101764007 A CN 2009101764007A CN 200910176400 A CN200910176400 A CN 200910176400A CN 102036228 A CN102036228 A CN 102036228A
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Abstract
The invention discloses a method for realizing terminal handover. The method is applied to a network in which an identity identifier and a position identifier are separated. In the network, an access identifier serves as the identity identifier of a user of a terminal and a routing identifier serves as the position identifier of the terminal. The method comprises the following steps that: a source access service node (ASN) acquires that the terminal needs to be subjected to handover and then requests a target ASN for the handover; the target ASN completes the handover preparation according to the request of the source ASN and notifies the source ASN of the ready state; the source ASN receives a notice that the target ASN is ready and then sends the relevant information of the user of the terminal to the target ASN; and after completing the relevant handover of an access network, the target ASN notifies the source ASN of releasing the relevant information of the wireless side to realize the handover completion between the source ASN and the target ASN. The handover speed is high, the user does not feel the change of the ASN, and the upper service is kept continuously.
Description
Technical field
The present invention relates to the network that identify label separates with station location marker, relate in particular to a kind of method and system that realize that terminal is switched.
Background technology
At present, the IP address has dual-use function in the widely used TCP/IP in internet (transmission control protocol/internet interconnection protocol) agreement, both as the station location marker of communication terminal host network interface in network topology of network layer, again as the identify label of transport layer host network interface.Do not consider the situation that main frame moves at the beginning of the ICP/IP protocol design.But when main frame moved more and more generally, the semanteme overload defective of this IP address was obvious day by day.When the IP address of main frame changed, not only route will change, and the identify label of communication terminal main frame also changes, and can cause routing overhead more and more heavier like this, and the variation of host identification can cause using and the interruption that is connected.
Purpose that identify label separates with station location marker proposed be to solve the semanteme overload of IP address and routing overhead seriously and problem such as fail safe, the dual-use function of IP address is separated, realize the support that the problems such as exchanging visit between the heterogeneous networks zone in routing overhead and the Next Generation Internet are dynamically heavily distributed, alleviated in mobility, many locals property, IP address.
At present, under identify label and the network architecture that station location marker separates, the correlation technique of realizing that terminal is switched is proposed as yet.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and system that realize that terminal is switched, and the position of realizing terminal in identify label and network that station location marker separates is switched and kept professional continuity.
For solving the problems of the technologies described above, a kind of method that realizes that terminal is switched of the present invention, be applied in identify label and the network that station location marker separates, in this network, identify (AID) User Identity as terminal to insert, with the station location marker of Route Distinguisher (RID) as terminal, this method comprises:
After source access service node (ASN) knows that this terminal need be switched, switch to purpose ASN request;
Purpose ASN finishes to switch and prepare, and notification source ASN is ready according to the request of source ASN;
After source ASN receives the ready notice of purpose ASN, the user related information of this terminal is sent to purpose ASN;
After the relevant switching of access network was finished, purpose ASN notification source ASN discharged the related resource of wireless side, and the switching between source ASN and the purpose ASN is finished.
Further, after switching between source ASN and the purpose ASN is finished, purpose ASN is Route Distinguisher (RID) that points to this ASN of terminal distribution, and this purpose ASN upgrades the AID-RID map information of the terminal of preservation in the identity location register (ILR) in terminal attaching territory.
Further, the information that comprises the Correspondent Node of this terminal in the user related information of terminal.
Further, source ASN also sends to this ILR with the information of the Correspondent Node of terminal, by this ILR the information of the Correspondent Node of terminal is sent to purpose ASN.
Further, ILR also sends to the ASN that the Correspondent Node of this terminal inserts according to the information of the Correspondent Node of the terminal AID-RID map information after with the renewal of terminal.
Further, source ASN knows that the process that terminal need be switched comprises:
The source Access Network that terminal and this terminal insert carries out mutual and detects, and the source ASN that is inserted by this terminal, source Access Network or this terminal judges whether this terminal needs to stride ASN and switch;
If judge by the source Access Network whether terminal needs to stride ASN and switch, and when needed, then notification source ASN terminal need be switched;
If whether need to stride ASN by terminal judges switch, when needed, then the notification source Access Network need switch, and the source Access Network reinforms source ASN terminal and need switch.
Further, the source access network is by sending handoff request (Handover Req) message, and notification source ASN terminal need be switched, and carries the ID of source access network and the ID of purpose access network in handoff request message.
Further, source ASN is by sending ASN handoff request (ASN handover Req) message to purpose ASN, switch the ID of the AID of carried terminal, contextual information, wireless parameter and purpose access network in ASN in this ASN handoff request message to purpose ASN request.
Further, purpose ASN finishes the process of switch preparing and comprises:
Purpose ASN is the carrying of terminal foundation at wireless side according to carrying wireless parameter and the contextual information of this terminal in ASN in the ASN handover Req message.
Further, after purpose ASN was the carrying of terminal foundation at wireless side, by sending ASN handoff response (ASN handover response) to source ASN, notification source ASN was ready, and carrying purpose ASN is the beared information at wireless side that terminal is set up.
Further, after source ASN received beared information, the notification source access network carries out data to be shifted, and the beared information that receives is transmitted to the source Access Network;
The downlink data that the source access network will not be handed down to terminal as yet is transferred to the purpose access network; And, insert the relevant bearer information of online terminal to purpose Access Network transfer source according to beared information.
Further, when directly not being connected between source Access Network and the purpose Access Network, carry out data forwarding by source ASN and purpose ASN.
Further, source ASN confirms (ASN Context ACK) message by send the ASN context to purpose ASN, and the user related information of terminal is sent to purpose ASN.
Further, the process of the relevant switching of access network comprises:
The contextual information that the source access network is relevant with the wireless side of terminal sends to the purpose access network;
Purpose access network notice purpose ASN has entered the state that service is provided;
Mutual between terminal and the purpose access network, carry out the application and the configuration of Radio Resource.
Further, after the relevant switching of access network was finished, the purpose access network sends to switch to purpose ASN finished (Handover completed) message, and the switching of notice purpose ASN access network is finished;
After purpose ASN receives handoff completion message, finish (ASN handover Completed) message by send the ASN switching to source ASN, notification source ASN discharges the related resource of wireless side.
Further, in the handoff procedure,, then packet is transmitted to purpose ASN if source ASN receives the packet that sends to terminal.
Further, the process upgraded of the AID-RID map information of the terminal of preserving among the ILR of purpose ASN to the terminal attaching territory comprises:
Purpose ASN sends to ILR with the AID-RID map information of terminal;
ILR upgrades the AID-RID map information of local this terminal of preserving, and ASN returns acknowledge message to purpose.
Further, purpose ASN is by RID notice (Notify RID) message, and the RID of terminal is sent to ILR;
The affirmation message that ILR returns to purpose ASN is RID Notification Validation (Notify RID ACK) message.
Further, after purpose ASN receives the information of Correspondent Node of terminal, also with the Correspondent Node of terminal alternately to finish the renewal of terminal AID-RID map information, comprising:
Purpose ASN is according to the information of the Correspondent Node of terminal, and the map information of the AID-RID of the terminal after upgrading is sent to the ASN that Correspondent Node inserts;
The ASN that the Correspondent Node of terminal inserts upgrades the AID-RID map information of local this terminal of preserving, and sends to purpose ASN and confirms that RID finishes the message of renewal.
Further, if terminal has a plurality of Correspondent Nodes, and these a plurality of Correspondent Nodes do not belong to same ASN, and the RID of the terminal after then purpose ASN will upgrade sends to the ASN that a plurality of Correspondent Nodes insert separately.
Further, purpose ASN sends to the RID of the terminal after upgrading the ASN of Correspondent Node access by RID updating message (Update RID);
The message that the affirmation RID that the ASN that the Correspondent Node of terminal inserts sends to purpose ASN finishes renewal is that RID upgrades affirmation (Update RID ACK) message.
Further, after the AID-RID map information of the terminal that the Correspondent Node of the ILR in terminal attaching territory and terminal is preserved upgraded, also notification source ASN discharged all kinds of resources relevant with terminal.
Further, purpose ASN finishes notice (Notify handovercompleted) message by sending to switch to source ASN, and notification source ASN discharges all kinds of resources relevant with terminal.
Further, a kind of system that realizes that terminal is switched, be applied in identify label and the network that station location marker separates, in this network with the User Identity of AID as terminal, with the station location marker of RID as terminal, comprise: the Correspondent Node of terminal, source ASN, purpose ASN, ILR and terminal, wherein:
Source ASN is used for after knowing that terminal need be switched, and switches to purpose ASN request; After purpose ASN is ready, the user related information of terminal is sent to purpose ASN;
Purpose ASN is used for the request according to source ASN, finish to switch and prepare, and notification source ASN is ready; After the relevant switching of access network was finished, notification source ASN discharged the related resource of wireless side.
Further, purpose ASN also is used for after the switching between source ASN and the purpose ASN is finished, and be Route Distinguisher (RID) that points to this ASN of terminal distribution, and the AID-RID map information of the terminal of preserving among the ILR to the terminal attaching territory upgrades.
Further, the information that comprises the Correspondent Node of this terminal in the user related information of terminal.
Further, source ASN also is used for the information of the Correspondent Node of terminal is sent to this ILR;
ILR is used for the information of the Correspondent Node of terminal is sent to purpose ASN.
Further, ILR also is used for the ASN that Correspondent Node that information according to the Correspondent Node of the terminal AID-RID map information after with the renewal of terminal sends to this terminal inserts.
Further, source ASN knows that the process that terminal need be switched comprises:
The source Access Network that terminal and this terminal insert carries out mutual and detects, and the source ASN that is inserted by this terminal, source Access Network or this terminal judges whether this terminal needs to stride ASN and switch;
If judge by the source Access Network whether terminal needs to stride ASN and switch, and when needed, then notification source ASN terminal need be switched;
If whether need to stride ASN by terminal judges switch, when needed, then the notification source Access Network need switch, and the source Access Network reinforms source ASN terminal and need switch.
Further, the source access network is by sending handoff request (Handover Req) message, and notification source ASN terminal need be switched, and carries the ID of source access network and the ID of purpose access network in handoff request message.
Further, source ASN is by sending ASN handoff request (ASN handover Req) message to purpose ASN, switch the ID of the AID of carried terminal, contextual information, wireless parameter and purpose access network in ASN in this ASN handoff request message to purpose ASN request.
Further, purpose ASN finishes the process of switch preparing and comprises:
Purpose ASN is the carrying of terminal foundation at wireless side according to carrying wireless parameter and the contextual information of this terminal in ASN in the ASN handover Req message.
Further, after purpose ASN was the carrying of terminal foundation at wireless side, by sending ASN handoff response (ASN handover response) to source ASN, notification source ASN was ready, and carrying purpose ASN is the beared information at wireless side that terminal is set up.
Further, after source ASN received beared information, the notification source access network carries out data to be shifted, and the beared information that receives is transmitted to the source Access Network;
The downlink data that the source access network will not be handed down to terminal as yet is transferred to the purpose access network; And, insert the relevant bearer information of online terminal to purpose Access Network transfer source according to beared information.
Further, the process of the relevant switching of access network comprises:
The contextual information that the source access network is relevant with the wireless side of terminal sends to the purpose access network;
Purpose access network notice purpose ASN has entered the state that service is provided;
Mutual between terminal and the purpose access network, carry out the application and the configuration of Radio Resource.
The present invention has following beneficial effect:
Switch in the process of ASN in terminal, can keep User Identity constant, guarantee that IP-based upper-layer service is continuous, the information that terminal is relevant can be transferred on the incision ASN, comprises the information of Correspondent Node etc., has guaranteed not interrupting of terminal upper-layer service, and, after switching is finished, can transfer to by the tunnel on the ASN of incision through the ASN that cuts out in the data on the former transmission path, improve user's experience.
Switch speed of the present invention is fast, and variation has taken place the imperceptible ASN of user, and upper-layer service keeps continuously; Hand-off process when support terminal is communicated by letter with a plurality of opposite ends; Data forwarding mechanism is arranged between ASN, and data can be issued the ASN after the switching, reduce the probability of data packet loss.
Description of drawings
The Organization Chart of the network that Fig. 1 separates with station location marker for identify label;
The Organization Chart of the network that Fig. 2 separates with station location marker for another kind of identify label;
The Organization Chart of the network that Fig. 3 separates with station location marker for the third identify label;
Fig. 4 realizes the flow chart of the method that terminal is switched for the present invention.
Embodiment
Figure 1 shows that the framework of the network that IP based network router realization identify label separates with station location marker, wherein the logic function of each network element is as follows:
Access service node (ASN), be responsible for various portable terminals access service is provided, be the terminal distribution Route Distinguisher (RID) that inserts, and send in the core net after the data message of terminal encapsulated and transmit, and the position of responsible query communication opposite end, if the route positional information of Correspondent Node is not preserved in ASN this locality, just search by the mapping Forwarding plane.
The mapping Forwarding plane is made up of a plurality of identity location registers/packet forward function (ILR/PTF), is responsible for the identify label of terminal in the maintaining network and the map information of Route Distinguisher, and provides inquiry service to ASN and other ILR.
Authentication center is responsible for information such as the record terminal class and the grade of service, when terminal inserts, terminal is carried out the legitimacy authentication and authorization.The bi-directional authentification of authentication center's network enabled and terminal room.
IP backbone is the internet between the ASN, and major function is to carry out routing and transmit data message according to the Route Distinguisher in the data message, and the data forwarding that ASN is sent arrives correct destination; IP network is made up of core switch router (CSR).IP backbone is identical with present networks, does not need to carry out any modification.
Interworking gateway (ISN) is the intercommunication node of identify label and station location marker separated network and other network, and the network that two classes are different must communicate by ISN.
Wireless access network, be responsible for providing and maintenance terminal to two layers of link between the ASN, in cellular mobile network, be responsible for allocation of radio resources and management etc.Wireless network can be WCDMA (Wideband Code Division Multiple Access (WCDMA)), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), CDMA2000 (CDMA 2000), LTE wireless networks such as (Long Term Evolutions).
Figure 2 shows that the another kind of framework of realizing the network that identify label separates with station location marker, this framework is divided into Access Network and backbone network with network.Access Network is positioned at the edge of backbone network, is used for being responsible for the access of all terminals.Backbone network is responsible for route and the forwarding by the inter-terminal data message of Access Network access.Access Network and backbone network do not have overlapping on topological relation.
Two kinds of sign types are arranged: insert sign (AID:Access Identifier) and Route Distinguisher (RID:Routing Identifier) in the network of this framework.Wherein, AID is the user identity identification of terminal, is used for the identity of marking terminal user (also abbreviating the user as), and network is AID of the unique distribution of each terminal use, uses at Access Network, remains constant in the moving process of terminal; RID is the station location marker for terminal distribution, uses at backbone network.
In this framework, the terminal of access network can be one or more in portable terminal, fixed terminal and the roam terminals, as mobile phone, landline telephone, computer and application server or the like.
In this framework, Access Network is used to terminal to be provided to two layers of (physical layer and link layer) access means, the physics access link between maintenance terminal and the ASN.Two layers of possible access means comprise: cellular mobile network technology (GSM/CDMA/TD-SCDMA/WCDMA/WiMAX/LTE), DSL, band optical fiber access or WiFi access etc.).Present embodiment relates generally to wireless access network.
Be divided into two planes during the backbone network networking of this framework: broad sense Forwarding plane and mapping Forwarding plane also comprise access service node (ASN:Access Service Node) and authentication center.
ASN is the boundary node of broad sense Forwarding plane, mapping Forwarding plane and Access Network, has the interface with Access Network, broad sense Forwarding plane and mapping Forwarding plane.Be used to terminal to provide access service, maintenance terminal to be connected with network, be terminal distribution RID, the RID to registration of mapping Forwarding plane and inquiry terminal safeguards the AID-RID map information, and the route and the forwarding that realize data message.
The broad sense Forwarding plane is mainly used in that to carry out routing and transmit with RID according to the RID in the data message be the data message of destination address, and the data routing forwarding behavior in the broad sense Forwarding plane is consistent with traditional IP.As shown in the figure, the main network element of broad sense Forwarding plane comprises generic router (CR:Common Router) and interconnect services node (ISN:Interconnect Service Node)
The mapping Forwarding plane is mainly used in the identity location map information (being the map information of AID-RID) of preserving terminal, handles registration and inquiry to terminal location, and route and forwarding are the data message of destination address with AID.As shown in the figure, the main network element of mapping Forwarding plane comprises identity location register/packet forward function (ILR/PTF:Identity Location Register/Packet Transfer Function).
Authentication center is used for minute book architecture network terminal use's attribute information such as class of subscriber, authentication information and user's grade of service etc., finishes access authentication and mandate to terminal, also can have billing function.Authentication center's support terminal and internetwork two-way authentication, can produce be used to authenticate, the user security information of integrity protection and encryption.
In another embodiment, ASN is independent of backbone network in the division of framework, is positioned at the boundary node of backbone network and Access Network, has the interface with Access Network and backbone network, as shown in Figure 3.Its actual function of finishing is the same with Fig. 2.
In the present embodiment, the ASN that needs terminal to cut out can find the ASN of terminal incision, can adopt the mode of static configuration or dynamic queries to realize, this just requires at each ASN of network internal a unique sign (ID) to be arranged.
Need to guarantee that the link between the ASN interconnects, can communicate with one another between the ASN.
ASN need possess the ability of directly docking with access network equipment, during specific implementation, the function that relates to the wireless side mobile management can independently be provided with, not necessarily to unify with ASN, the function that ASN is last and access network is mutual can be separated out with independent network element and be existed, and other function can be constant.
Figure 4 shows that the method that present embodiment realization terminal is switched, can be based on Fig. 1～arbitrary network architecture shown in Figure 3.Wherein, ASN1, ASN2 and ASN3 are the access service nodes; ILR is the identity location register, preserves the AID of terminal and the map information of RID.Wireless access network 1 and wireless access network 2 are respectively terminal the service that inserts ASN1 and ASN2 are provided.Suppose that terminal initially inserts from ASN1, and establish IP and communicate to connect with application server (APP Server) under the ASN3.In business was carried out, terminal switched, and switched to ASN2.
Before terminal was switched, the path of data flow was: terminal → wireless access network 1 → ASN1 → ASN3 → APP Server; For convenience of description, in the present embodiment Access Network 1 is called the source access network, Access Network 2 is called the purpose access network; ASN1 is called source ASN (also can be described as and cut out ASN), ASN2 is called purpose ASN (also can be described as incision ASN).
Idiographic flow comprises:
401: the source access network judges by with the mutual of terminal with detect whether terminal needs to stride ASN and switch, and strides the ASN switching if desired, then carries out next step;
The source access network can judge that whether the Target cell that switches belongs to another ASN, determines whether to stride the switching of ASN according to configuration information.In another embodiment, the source access network also can send to the information of Target cell source ASN, is judged whether to stride the switching of ASN by source ASN.
Can adopt existing detection technique in the present embodiment, as the detection technique of WCDMA, CDMA2000 or TD-SCDMA.
This step is switch decision (Decision Handover) process.The judgement of switching also can be undertaken by terminal.
402: the source access network sends handoff request (Handover Req) message to source ASN, and notification source ASN terminal need be switched, and carries the ID of source access network and the ID of purpose access network in handoff request message;
The selection of access network can be adopted existing network selecting technology, as the technology of WCDMA, CDMA2000 or TD-SCDMA.
403: source ASN sends ASN handoff request (ASN handover Req) to purpose ASN, and the AID of terminal, the information such as ID of contextual information, wireless parameter and purpose access network among the ASN are sent to purpose ASN;
404: purpose ASN is that terminal is set up the carrying at wireless side according to wireless parameter information in the ASN handoff request and ASN contextual information;
Wireless parameter comprises: QOS (Quality of Service), sequence number and priority etc.
This step is that radio bearer is set up (Radio Establishment) process.
405: purpose ASN sends ASN handoff response (ASN handover response) to source ASN, will send to source ASN for the beared information at wireless side that terminal is set up, and it has been ready for notification source ASN;
406: after source ASN receives the beared information at wireless side for terminal foundation of purpose ASN transmission, the notification source access network carries out data and shifts (Handover command, switching command), and with purpose ASN is that the beared information at wireless side that terminal is set up is transmitted to the source Access Network;
407: carry out data between source access network and the purpose access network and shift (Forwarding of data), the downlink data that the source access network will not be handed down to terminal is transferred to the purpose access network, and be the beared information at wireless side that terminal is set up according to purpose ASN, insert the relevant bearer information of online terminal to purpose Access Network transfer source;
For example: set up successfully two bearing links on the purpose Access Network, and set up three bearing links on the Access Network of source, the source Access Network only need shift the beared information of two correspondences to the purpose Access Network so.
When between two Access Networks directly intercommunication the time, carry out data forwarding by ASN; When ASN carries out data forwarding, only need carry out the route of IP aspect, can not revise the content of data message.
408: source ASN returns ASN to purpose ASN and switches affirmation (ASN handover ACK) message, and the user related information of terminal confirmed that by the ASN context (ASN Context ACK) message sends to purpose ASN, user related information comprises: the AID-RID map information of the Correspondent Node of AID-RID map information, metering data and the terminal of terminal etc.;
409: the contextual information that the source access network is relevant with the wireless side of terminal sends to purpose access network (Handover commit switches and carries out);
410: purpose access network notice purpose ASN purpose access network has entered the state (Handover detect switches and finds) that service is provided;
411: mutual between terminal and the purpose access network, carry out the application and the configuration of Radio Resource, as obtaining the information such as frequency, channel and speed that communication needs; (Target Radio handling, the Target Wireless net is adjusted);
Finish this time mutual after, terminal can send upstream data by the purpose access network.
412: the purpose access network sends to switch to purpose ASN finishes (Handover completed) message, and the switching of notice purpose ASN access network is finished;
413: purpose ASN sends the ASN switching to source ASN and finishes (ASN handover Completed) message, and the switching of notification source ASN purpose ASN is finished, and notification source ASN discharges the related resource of wireless side;
414: source ASN discharges the related resource of wireless side;
415: in handoff procedure, if source ASN receives the packet that sends to terminal, then packet is transmitted to purpose ASN (Forwarding of ASN data), source ASN is when transmitting packet, can judge current state, also do not finish if switch, packet can be issued the source access network, be transmitted to the purpose access network by the source access network; Perhaps carry out local cache, be transmitted to purpose ASN by the tunnel again after waiting switching by source ASN;
In order to make full use of existing backbone network, the packet between the ASN is the IP bag of standard, assurance can the enterprising walking along the street of IP backbone network by.
416: purpose ASN is RID (also can be described as the RID of purpose ASN) who points to this ASN of terminal distribution, and territory ILR upgrades this location information of terminals by Notify RID message informing terminal attaching, carries the AID and the RID information of this terminal;
Data message can be routed to this purpose ASN according to the RID that points to purpose ASN.
417: after the identity location register receives AID and RID after terminal is upgraded, upgrade the AID-RID map information of local this terminal of preserving, return acknowledge message (Notify RIDACK) to purpose ASN;
418: purpose ASN sends RID updating message (Update RID) to the ASN of the Correspondent Node access of terminal, and the relevant ASN of notice is the RID of new terminal more;
If terminal is connected with a plurality of application servers, and these application servers then need the ASN that notifies each application server to insert the RID after the terminal renewal not under same ASN.
In the present embodiment, ASN, i.e. an ASN3 have only been listed for the purpose of simplifying the description.
In other the execution mode, also can the information (comprising Correspondent Node AID and RID) of the Correspondent Node of this terminal be sent to ILR by source ASN, purpose ASN obtains the information of the Correspondent Node of this terminal from ILR, also can be by ILR according to Correspondent Node information, with the ASN of the RID notifying communication opposite end access after the terminal renewal.
419: the ASN that the Correspondent Node of terminal inserts upgrades the AID-RID map information of local this terminal of preserving, and sends to purpose ASN and confirms that RID finishes the message (Update RID ACK) of renewal;
420: purpose ASN sends to switch to source ASN and finishes notice (Notify handover completed) message, and notification source ASN discharges all kinds of resources relevant with terminal, and switching is finished.
After switching was finished, the path of data flow was: terminal → WAP (wireless access point) net 2 → ASN2 → ASN3 → APP server.
In the present embodiment and the interface access network control appliance can flexible expansion when realizing.
The present invention also provides a kind of system that realizes that terminal is switched, and is applied to comprise in identify label and the network that station location marker separates: the Correspondent Node of terminal, source ASN, purpose ASN, ILR and terminal, wherein:
Source ASN is used for after knowing that terminal need be switched, and switches to purpose ASN request; After purpose ASN is ready, the user related information of terminal is sent to purpose ASN; The information that comprises the Correspondent Node of this terminal in the user related information of terminal.
Purpose ASN is used for the request according to former ASN, finish to switch and prepare, and notification source ASN is ready; After the relevant switching of access network was finished, notification source ASN discharged the related resource of wireless side.
Purpose ASN also is used for after the switching between source ASN and the purpose ASN is finished, and be Route Distinguisher (RID) that points to this ASN of terminal distribution, and the AID-RID map information of the terminal of preserving among the ILR to the terminal attaching territory upgrades.
Source ASN also is used for the information of the Correspondent Node of terminal is sent to this ILR;
ILR is used for the information of the Correspondent Node of terminal is sent to purpose ASN.
ILR also is used for the ASN that Correspondent Node that information according to the Correspondent Node of the terminal AID-RID map information after with the renewal of terminal sends to this terminal inserts.
Source ASN knows that the process that terminal need be switched comprises:
The source Access Network that terminal and this terminal insert carries out mutual and detects, and the source ASN that is inserted by this terminal, source Access Network or this terminal judges whether this terminal needs to stride ASN and switch;
If judge by the source Access Network whether terminal needs to stride ASN and switch, and when needed, then notification source ASN terminal need be switched;
If whether need to stride ASN by terminal judges switch, when needed, then the notification source Access Network need switch, and the source Access Network reinforms source ASN terminal and need switch.
The source access network is by sending handoff request (Handover Req) message, and notification source ASN terminal need be switched, and carries the ID of source access network and the ID of purpose access network in handoff request message.
Source ASN is by sending ASN handoff request (ASN handover Req) message to purpose ASN, switch the ID of the AID of carried terminal, contextual information, wireless parameter and purpose access network in ASN in this ASN handoff request message to purpose ASN request.
Purpose ASN finishes the process of switching preparation and comprises:
Purpose ASN is the carrying of terminal foundation at wireless side according to carrying wireless parameter and the contextual information of this terminal in ASN in the ASN handover Req message.
After purpose ASN was the carrying of terminal foundation at wireless side, by sending ASN handoff response (ASN handover response) to source ASN, notification source ASN was ready, and carrying purpose ASN is the beared information at wireless side that terminal is set up.
After source ASN received beared information, the notification source access network carries out data to be shifted, and the beared information that receives is transmitted to the source Access Network;
The downlink data that the source access network will not be handed down to terminal as yet is transferred to the purpose access network; And, insert the relevant bearer information of online terminal to purpose Access Network transfer source according to beared information.
The process of the relevant switching of access network comprises:
The contextual information that the source access network is relevant with the wireless side of terminal sends to the purpose access network;
Purpose access network notice purpose ASN has entered the state that service is provided;
Mutual between terminal and the purpose access network, carry out the application and the configuration of Radio Resource.
Other function of network element sees also the detailed description of method content in the system.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (35)
1. method that realizes that terminal is switched, be applied to it is characterized in that in identify label and the network that station location marker separates, in this network to insert sign (AID) User Identity as terminal, with the station location marker of Route Distinguisher (RID) as terminal, this method comprises:
After source access service node (ASN) knows that this terminal need be switched, switch to purpose ASN request;
Purpose ASN finishes to switch and prepare, and notification source ASN is ready according to the request of source ASN;
After source ASN receives the ready notice of purpose ASN, the user related information of this terminal is sent to purpose ASN;
After the relevant switching of access network was finished, purpose ASN notification source ASN discharged the related resource of wireless side, and the switching between source ASN and the purpose ASN is finished.
2. the method for claim 1, it is characterized in that, after switching between described source ASN and the purpose ASN is finished, described purpose ASN is Route Distinguisher (RID) that points to this ASN of described terminal distribution, and this purpose ASN upgrades the AID-RID map information of the described terminal of preservation in the identity location register (ILR) in described terminal attaching territory.
3. method as claimed in claim 2 is characterized in that, comprises the information of the Correspondent Node of this terminal in the user related information of described terminal.
4. method as claimed in claim 2 is characterized in that,
Described source ASN also sends to this ILR with the information of the Correspondent Node of described terminal, by this ILR the information of the Correspondent Node of described terminal is sent to described purpose ASN.
5. method as claimed in claim 4 is characterized in that, described ILR also sends to the ASN that the Correspondent Node of this terminal inserts according to the information of the Correspondent Node of the described terminal AID-RID map information after with the renewal of described terminal.
6. the method for claim 1 is characterized in that, source ASN knows that the process that terminal need be switched comprises:
The source Access Network that terminal and this terminal insert carries out mutual and detects, and the source ASN that is inserted by this terminal, described source Access Network or this terminal judges whether this terminal needs to stride ASN and switch;
If judge by the source Access Network whether terminal needs to stride ASN and switch, and when needed, then notification source ASN terminal need be switched;
If whether need to stride ASN by terminal judges switch, when needed, then the notification source Access Network need switch, and the source Access Network reinforms source ASN terminal and need switch.
7. method as claimed in claim 6 is characterized in that,
Described source access network is by sending handoff request (Handover Req) message, and notification source ASN terminal need be switched, and carries the ID of source access network and the ID of purpose access network in described handoff request message.
8. method as claimed in claim 7 is characterized in that,
Described source ASN is by sending ASN handoff request (ASN handover Req) message to purpose ASN, switch the ID of the AID of carried terminal, contextual information, wireless parameter and purpose access network in ASN in this ASN handoff request message to purpose ASN request.
9. method as claimed in claim 8 is characterized in that, described purpose ASN finishes the process of switching preparation and comprises:
Described purpose ASN is the carrying of described terminal foundation at wireless side according to carrying wireless parameter and the contextual information of this terminal in ASN in the described ASN handover Req message.
10. method as claimed in claim 9 is characterized in that,
After described purpose ASN is the carrying of described terminal foundation at wireless side, by sending ASN handoff response (ASN handover response) to source ASN, notification source ASN is ready, and carrying purpose ASN is the beared information at wireless side that described terminal is set up.
11. method as claimed in claim 10 is characterized in that,
After described source ASN received described beared information, the notification source access network carries out data to be shifted, and the described beared information that will receive is transmitted to the source Access Network;
The downlink data that described source access network will not be handed down to terminal as yet is transferred to the purpose access network; And, insert the relevant bearer information of online terminal to purpose Access Network transfer source according to described beared information.
12. method as claimed in claim 11 is characterized in that,
When directly not being connected between described source Access Network and the described purpose Access Network, carry out data forwarding by described source ASN and described purpose ASN.
13. method as claimed in claim 3 is characterized in that,
Described source ASN confirms (ASN Context ACK) message by send the ASN context to purpose ASN, and the user related information of terminal is sent to purpose ASN.
14. the method for claim 1 is characterized in that, the process of the relevant switching of described access network comprises:
The contextual information that the source access network is relevant with the wireless side of terminal sends to the purpose access network;
Purpose access network notice purpose ASN has entered the state that service is provided;
Mutual between terminal and the purpose access network, carry out the application and the configuration of Radio Resource.
15. method as claimed in claim 14 is characterized in that,
After the relevant switching of access network was finished, the purpose access network sends to switch to purpose ASN finished (Handover completed) message, and the switching of notice purpose ASN access network is finished;
After purpose ASN receives handoff completion message, finish (ASN handover Completed) message by send the ASN switching to source ASN, notification source ASN discharges the related resource of wireless side.
16. method as claimed in claim 14 is characterized in that,
In the handoff procedure,, then packet is transmitted to purpose ASN if source ASN receives the packet that sends to described terminal.
17. method as claimed in claim 2 is characterized in that, the process that the AID-RID map information of the described terminal of preserving among the ILR of described purpose ASN to described terminal attaching territory upgrades comprises:
Described purpose ASN sends to described ILR with the AID-RID map information of described terminal;
Described ILR upgrades the AID-RID map information of local this terminal of preserving, and ASN returns acknowledge message to purpose.
18. method as claimed in claim 17 is characterized in that,
Described purpose ASN is by RID notice (Notify RID) message, and the RID of terminal is sent to ILR;
The affirmation message that described ILR returns to purpose ASN is RID Notification Validation (Notify RIDACK) message.
19. as claim 3 or 4 described methods, it is characterized in that, after described purpose ASN receives the information of Correspondent Node of described terminal, also with the Correspondent Node of described terminal alternately to finish the renewal of described terminal AID-RID map information, comprising:
Described purpose ASN is according to the information of the Correspondent Node of terminal, and the map information of the AID-RID of the terminal after upgrading is sent to the ASN that Correspondent Node inserts;
The ASN that the Correspondent Node of described terminal inserts upgrades the AID-RID map information of local this terminal of preserving, and sends to purpose ASN and confirms that RID finishes the message of renewal.
20. method as claimed in claim 19 is characterized in that,
If terminal has a plurality of Correspondent Nodes, and these a plurality of Correspondent Nodes do not belong to same ASN, and the RID of the terminal after then purpose ASN will upgrade sends to the ASN that a plurality of Correspondent Nodes insert separately.
21. method as claimed in claim 19 is characterized in that,
Described purpose ASN sends to the RID of the terminal after upgrading the ASN of Correspondent Node access by RID updating message (Update RID);
The message that the affirmation RID that the ASN that the Correspondent Node of described terminal inserts sends to purpose ASN finishes renewal is that RID upgrades affirmation (Update RID ACK) message.
22. method as claimed in claim 19 is characterized in that, after the AID-RID map information of the described terminal that the Correspondent Node of the ILR in described terminal attaching territory and described terminal is preserved upgraded, also notification source ASN discharged all kinds of resources relevant with terminal.
23. method as claimed in claim 22 is characterized in that, described purpose ASN finishes notice (Notify handover completed) message by sending to switch to source ASN, and notification source ASN discharges all kinds of resources relevant with terminal.
24. system that realizes that terminal is switched, be applied in identify label and the network that station location marker separates, it is characterized in that, in this network with the User Identity of AID as terminal, with the station location marker of RID as terminal, comprise: the Correspondent Node of terminal, source ASN, purpose ASN, ILR and terminal, wherein:
Described source ASN is used for after knowing that terminal need be switched, and switches to purpose ASN request; After purpose ASN is ready, the user related information of terminal is sent to purpose ASN;
Purpose ASN is used for the request according to source ASN, finish to switch and prepare, and notification source ASN is ready; After the relevant switching of access network was finished, notification source ASN discharged the related resource of wireless side.
25. system as claimed in claim 24 is characterized in that,
Described purpose ASN, also be used for after the switching between described source ASN and the purpose ASN is finished, be Route Distinguisher (RID) that points to this ASN of described terminal distribution, and the AID-RID map information of the described terminal of preserving among the ILR to described terminal attaching territory upgrades.
26. system as claimed in claim 25 is characterized in that, comprises the information of the Correspondent Node of this terminal in the user related information of described terminal.
27. system as claimed in claim 25 is characterized in that,
Described source ASN also is used for the information of the Correspondent Node of described terminal is sent to this ILR;
Described ILR is used for the information of the Correspondent Node of described terminal is sent to described purpose ASN.
28. system as claimed in claim 27 is characterized in that, described ILR also is used for the ASN that Correspondent Node that information according to the Correspondent Node of the described terminal AID-RID map information after with the renewal of described terminal sends to this terminal inserts.
29. system as claimed in claim 24 is characterized in that, source ASN knows that the process that terminal need be switched comprises:
The source Access Network that terminal and this terminal insert carries out mutual and detects, and the source ASN that is inserted by this terminal, described source Access Network or this terminal judges whether this terminal needs to stride ASN and switch;
If judge by the source Access Network whether terminal needs to stride ASN and switch, and when needed, then notification source ASN terminal need be switched;
If whether need to stride ASN by terminal judges switch, when needed, then the notification source Access Network need switch, and the source Access Network reinforms source ASN terminal and need switch.
30. system as claimed in claim 29 is characterized in that,
Described source access network is by sending handoff request (Handover Req) message, and notification source ASN terminal need be switched, and carries the ID of source access network and the ID of purpose access network in described handoff request message.
31. system as claimed in claim 30 is characterized in that,
Described source ASN is by sending ASN handoff request (ASN handover Req) message to purpose ASN, switch the ID of the AID of carried terminal, contextual information, wireless parameter and purpose access network in ASN in this ASN handoff request message to purpose ASN request.
32. system as claimed in claim 31 is characterized in that, described purpose ASN finishes the process of switching preparation and comprises:
Described purpose ASN is the carrying of described terminal foundation at wireless side according to carrying wireless parameter and the contextual information of this terminal in ASN in the described ASN handover Req message.
33. system as claimed in claim 32 is characterized in that,
After described purpose ASN is the carrying of described terminal foundation at wireless side, by sending ASN handoff response (ASN handover response) to source ASN, notification source ASN is ready, and carrying purpose ASN is the beared information at wireless side that described terminal is set up.
34. system as claimed in claim 33 is characterized in that,
After described source ASN received described beared information, the notification source access network carries out data to be shifted, and the described beared information that will receive is transmitted to the source Access Network;
The downlink data that described source access network will not be handed down to terminal as yet is transferred to the purpose access network; And, insert the relevant bearer information of online terminal to purpose Access Network transfer source according to described beared information.
35. system as claimed in claim 24 is characterized in that, the process of the relevant switching of described access network comprises:
The contextual information that the source access network is relevant with the wireless side of terminal sends to the purpose access network;
Purpose access network notice purpose ASN has entered the state that service is provided;
Mutual between terminal and the purpose access network, carry out the application and the configuration of Radio Resource.
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Application publication date: 20110427 |