CN101668318B - Method for switching mobile terminal among networks, communication system and network server - Google Patents
Method for switching mobile terminal among networks, communication system and network server Download PDFInfo
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- CN101668318B CN101668318B CN2008101193345A CN200810119334A CN101668318B CN 101668318 B CN101668318 B CN 101668318B CN 2008101193345 A CN2008101193345 A CN 2008101193345A CN 200810119334 A CN200810119334 A CN 200810119334A CN 101668318 B CN101668318 B CN 101668318B
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Abstract
The invention discloses a method for switching a mobile terminal among networks. The method comprises the following steps that: a destination network receives a network switching request initiated by the mobile terminal and determines a home entity with home agent functions, wherein the home entity is used by the mobile terminal when the mobile terminal performs data packet interaction with other networks in a source network; and the destination network establishes a connection between the mobile terminal and the determined home entity, or determines an external entity with external agent functions in the destination network and establishes a connection between the home entity and the determined external entity. Through the method, the outward-displayed IP address of the mobile terminal is not changed before and after the network switch, and the continuity of a service during the network switch is ensured. The invention also discloses a communication system and a network server.
Description
Technical field
The present invention relates to the data transmission technology of the communications field, relate in particular to method, communication system and the webserver that a kind of portable terminal switches between network.
Background technology
Continuous development along with communication service; The business demand that portable terminal switches between heterogeneous networks also constantly increases; Particularly portable terminal is supporting the handoff requirement between the network that moves the network of IP (MIP) technology and do not support the MIP technology to increase particularly evidently, wherein, supports that the representative network of MIP technology is World Interoperability for Microwave Access, WiMax network (World Interoperability for Microwave Access; WiMAX), do not support that the representative network of MIP technology is the 3GPP network.
For real the moving freely property that realizes the user; Improve user's business experience; Not only require the portable terminal can be in the switching between WiMAX and the 3GPP; Guarantee professional continuity when also requiring between network to switch, and professional continuity just requires the steady switching at two internetwork mobility management mechanism will guarantee to switch the time.
The mobility management mechanism of 3GPP network using is: through Serving GPRS Support Node (Serving GSN; SGSN) mobile management realizes the mobility support that packet domain is inner; In the 3GPP network, introduce GPRS Tunnel Protocol (GPRS Tunneling Protocol); In order to set up the tunneling mechanism of GPRS (GPRS) network internal, guarantee that the IP packet can not lost when network switches.The mobility management mechanism of WiMAX network using is: utilize MIP technology, (Home Agent, HA) (Care-of Address sets up the MIP tunnel between CoA) and comes the transmission of IP data bag with bringing in constant renewal in Care-of Address through home agent.
Because WiMAX is different with the internetwork mobility management mechanism of 3GPP, when portable terminal at the switching problem that can relate to different mobility management mechanism between WiMAX and 3GPP network during switching.If mobility management mechanism through traditional mobility management mechanism replacement WiMAX network that utilizes the 3GPP network; Perhaps utilize the mobility management mechanism of the mobility management mechanism replacement 3GPP network of WiMAX network to solve the switching problem of mobility management mechanism; Can produce following two consequences again: at first; See from the network architecture, can produce very big influence, need do bigger change the network architecture to WiMAX network or 3GPP network of network framework; Secondly, also need do very big change to the internal process of two networks, therefore, the solution of traditional switching problem to different mobility management mechanism realizes difficulty, is difficult to apply.
Summary of the invention
Method, communication system and the webserver that the embodiment of the invention provides a kind of portable terminal between network, to switch, the business continuance when between network, switching with the assurance terminal.
The method that a kind of portable terminal switches between network, this method comprises:
The network handoff request that purpose network mobile terminal receive is initiated, and confirm the ownership entity that said portable terminal utilizes when in source network, carrying out data-bag interacting with other networks with home agent function;
The purpose network is that portable terminal connects with the ownership entity of confirming, perhaps,
Confirm to have in the purpose network external entity of foreign agent functionality, and set up being connected of said ownership entity and the external entity of confirming;
Wherein:
Said purpose network is World Interoperability for Microwave Access, WiMax network WiMAX, and said source network is the 3GPP network, and perhaps said purpose network is the 3GPP network, and said source network is WiMAX;
Said ownership entity is home agent node HA in WiMAX, is the Gateway GPRS Support Node with home agent function in the 3GPP network;
Said external entity is the access service network gateway ASN-GW/FA with foreign agent functionality in the WiMAX network, is the Gateway GPRS Support Node with foreign agent functionality in the 3GPP network.
A kind of communication system, this system comprises:
Portable terminal is used to initiate the network handoff request;
Be applied to purpose network of network server, be used to receive said network handoff request, confirm the ownership entity that portable terminal utilizes when in source network, carrying out data-bag interacting with other networks with home agent function, and,
For said portable terminal and the said ownership entity of confirming connect, perhaps, confirm to have in the purpose network external entity of foreign agent functionality, and set up being connected of said ownership entity and definite external entity;
Wherein:
Said purpose network is World Interoperability for Microwave Access, WiMax network WiMAX, and said source network is the 3GPP network, and perhaps said purpose network is the 3GPP network, and said source network is WiMAX;
Said ownership entity is home agent node HA in WiMAX, is the Gateway GPRS Support Node with home agent function in the 3GPP network;
Said external entity is the access service network gateway ASN-GW/FA with foreign agent functionality in the WiMAX network, is the Gateway GPRS Support Node with foreign agent functionality in the 3GPP network.
A kind of webserver comprises:
Receiver module is used for the network handoff request that mobile terminal receive sends;
Ownership entity determination module is used for the ownership entity with home agent function of confirming that portable terminal utilizes when source network carries out data-bag interacting with other networks;
Connect and set up module; Being used to said portable terminal connects with the said ownership entity of confirming; Perhaps, confirm the external entity with foreign agent functionality of portable terminal in the purpose network, and set up being connected of said ownership entity and the external entity of confirming;
Wherein:
Said purpose network is World Interoperability for Microwave Access, WiMax network WiMAX, and said source network is the 3GPP network, and perhaps said purpose network is the 3GPP network, and said source network is WiMAX;
Said ownership entity is home agent node HA in WiMAX, is the Gateway GPRS Support Node with home agent function in the 3GPP network;
Said external entity is the access service network gateway ASN-GW/FA with foreign agent functionality in the WiMAX network, is the Gateway GPRS Support Node with foreign agent functionality in the 3GPP network.
The embodiment of the invention through the purpose network when receiving the network handoff request that portable terminal initiates; Confirm the ownership entity that portable terminal utilizes when in source network, carrying out data-bag interacting with other networks with home agent function; And according to the difference of Care-of Address; Setting up the tunnel for said portable terminal with the said ownership entity of confirming is connected; Perhaps, portable terminal corresponding external entity with foreign agent functionality in the purpose network is set up the tunnel with the ownership entity of confirming be connected, the IP address that makes portable terminal outwards show is constant before and after network switches; Keep the above communication of IP layer constant, therefore guaranteed continuity professional when network switches.
Description of drawings
The method flow sketch map that Fig. 1 switches between network for portable terminal in the embodiment of the invention one;
Fig. 2 is portable terminal process registration schematic flow sheet in the 3GPP network in the embodiment of the invention one;
Fig. 3 is portable terminal process registration schematic flow sheet in the WiMAX network in the embodiment of the invention one;
Fig. 4 is switched to the signaling process sketch map of 3GPP network by the WiMAX network for portable terminal in the embodiment of the invention two;
Fig. 5 is switched to the signaling process sketch map of WiMAX network by the 3GPP network for portable terminal in the embodiment of the invention three;
Fig. 6 is the structural representation of communication system in the embodiment of the invention four;
Fig. 7 is the structural representation of the webserver in the embodiment of the invention five.
Embodiment
The portable terminal that the embodiment of the invention provides can be that portable terminal is being supported the network of MIP technology and do not supporting to switch between the technological network of MIP at internetwork changing method, particularly, can be between 3GPP network and WiMAX network, to switch.
In order to realize the object of the invention, need to exist respectively in WiMAX network and the 3GPP network to have the entity of home agent function and entity with foreign agent functionality.Entity with home agent function can be accomplished the forwarding operation to packet, and the packet that is about to other networks transmissions is transmitted to portable terminal, or the packet that portable terminal sends is transmitted to other networks.Particularly; Can be that entity with home agent function is set up the tunnel with portable terminal and is connected the transmission that realizes packet; Or the entity with home agent function sets up the tunnel with the entity with foreign agent functionality and is connected, and by the entity with foreign agent functionality packet is transmitted to portable terminal.
In the present invention, the entity that has home agent function in the WiMAX network is that (Home Agent, HA), logic entity and access service network gateway (ASN-GW) with foreign agent functionality integrate the home agent node.For the ASN-GW with foreign agent functionality, it still has the general utility functions in the WiMAX network.
Owing to do not have HA and FA in traditional 3GPP network, so the present invention transforms the framework of 3GPP network, increased logic entity with home agent function and the logic entity with foreign agent functionality.Particularly, the logic entity with foreign agent functionality can integrate with the Gateway GPRS Support Node (GGSN) among the 3GPP, also can in the 3GPP network, increase network element, will have the logic entity of foreign agent functionality and the network element of increase and integrate.Similarly; Logic entity with home agent function also can integrate with the Gateway GPRS Support Node (GGSN) among the 3GPP; Or integrate with other physical entities in the 3GPP network; Can also in the 3GPP network, increase network element, will have the logic entity of home agent function and the network element of increase and integrate.
For the GGSN with home agent function or foreign agent functionality, it still has the general utility functions in the 3GPP network.
Be described in detail below in conjunction with the technical scheme of Figure of description the embodiment of the invention.
As shown in Figure 1, be the method flow sketch map that portable terminal in the embodiment of the invention one switches between network, this method may further comprise the steps:
Step 101: the network handoff request that purpose network mobile terminal receive is initiated requires to switch to the purpose network from source network.
The source network that the hypothesis portable terminal inserts before switching in present embodiment one is a network of supporting the MIP technology with one that switches in the purpose network that inserts the back, and another is a network of not supporting the MIP technology.
Portable terminal in the embodiment of the invention one is a dual-mode terminal; Can when the maintenance network technological with supporting MIP is connected, be linked in the network of not supporting the MIP technology, perhaps when keeping the network technological to be connected, be linked into and support in the technological network of MIP with not supporting MIP.
Step 102: the purpose network is determined the ownership entity with home agent function of said portable terminal in source network.
Because portable terminal need be registered in source network when inserting source network; Therefore; Log-on message will be stored in the corresponding server; For example can be kept at attaching position register/home subscriber server (Home Location Register, HLR/Home Subscriber Server, HSS) in.The log-on message here comprises the sign of sign, the source network of portable terminal, information of the ownership entity with home agent function that utilizes when the authentication information of portable terminal, portable terminal are carried out data-bag interacting with other networks in source network etc.
After the purpose network receives the network handoff request of portable terminal transmission; If comprise the sign of portable terminal and the sign of source network in the network handoff request; Then the purpose network can the log-on message of enquiry mobile terminal in source network, thereby inquire the information of the ownership entity of portable terminal in source network.If comprised the information of ownership entity in the network handoff request, then the purpose network can be confirmed corresponding ownership entity according to the information of the ownership entity that receives.
Step 103: to be portable terminal set up the tunnel with the ownership entity of confirming to the purpose network is connected, perhaps, portable terminal corresponding external entity with foreign agent functionality in the purpose network set up the tunnel with definite ownership entity be connected.
In this step, an end in tunnel is the ownership entity, and the other end can be different entities in condition of different.If the Care-of Address of preserving in the ownership entity is the address of portable terminal, then the other end in tunnel is a portable terminal, if Care-of Address is the external entity address in the purpose network, then the other end in tunnel is an external entity.
Step 104: remove the tunnel that portable terminal is set up in source network.
Description through above step 101 to step 104; The purpose network is receiving after portable terminal hopes the information of handover network; Confirm the ownership entity of portable terminal in source network, and utilize this ownership entity to set up the MIP tunnel, realized that portable terminal is by the switching (or do not support the network of MIP technology switch to the network of supporting MIP technology) of the network of supporting the MIP technology to the network of not supporting the MIP technology; And after accomplishing the network switching; The IP address that portable terminal outwards shows is constant before and after network switches, owing to kept the above communication of IP layer constant, and therefore; Be transmitted to portable terminal after the packet that is sent to portable terminal all routes to identical ownership entity, guaranteed continuity professional when network switches.
Portable terminal carries out network and switches before access source network earlier between two networks; The log-on message that comprises the information that belongs to entity that source network will produce is preserved; Be example with 3GPP network and WiMAX network respectively below, the flow process that portable terminal is registered in 3GPP network and WiMAX network is described.
As shown in Figure 2, be portable terminal process registration schematic flow sheet in the 3GPP network, this register method may further comprise the steps:
Step 201: (UMTS Terrestrial Radio Access Network UTRAN) inserts the 3GPP network to portable terminal through Radio Access Network.
Step 202: portable terminal sends authentication request (Auth Req) message to SGSN.
At least comprise mobile terminal identification in the Auth Rrq message of sending.
Step 203:SGSN sends to HLR/HSS with Auth Req message.
Step 204:HLR/HSS preserves the information of mobile terminal identification, access point (AP) information, the ownership entity of portable terminal in the 3GPP network etc. in this locality, and to SGSN return authentication response (Auth Resp) message.
The ownership entity here can be to have the logic entity of home agent function and an entity that network element integrates in the 3GPP network, and this network element can be GGSN, also can be other physical entities, can also be a network element that increases newly.
Said access-in point information is used to indicate that this portable terminal inserts from a certain definite network (3GPP or WiMAX network), and the access-in point information here is meant the 3GPP network information.
Step 205:SGSN returns to portable terminal with Auth Resp message, and the indicating mobile terminal authentication is passed through.
In step 202 to step 205; Portable terminal is the authentication request message of initiating through SGSN; The embodiment of the invention also is not limited to utilize Certificate Authority and charging, and (AAA) server is initiated authentication request for Authentication, Authorization and Accounting; By aaa server said authentication request is sent to HLR/HSS, and Auth Resp message is returned to portable terminal.
Step 206: portable terminal sends requesting activation PDP Context (Active PDP Context Req) message to the SGSN node at place.
Step 207:SGSN node sends requesting activation PDP Context message to the Gateway GPRS Support Node (GGSN/FA) of supporting foreign agent functionality.
In the present embodiment, logic entity and GGSN with foreign agent functionality integrate, and GGSN/FA are become have the external entity of foreign agent functionality.
Step 208:GGSN/FA node is after portable terminal is created corresponding PDP Context, returns to the SGSN node and activates response (Active PDP Context Resp) message.
Step 209:SGSN node returns to portable terminal with Active PDP Context Resp message.
Step 210:GGSN/FA node is broadcasted external agent (Agent Advertisement) information to portable terminal.
Step 211: portable terminal obtains the relevant information of GGSN/FA node from external agent's information of broadcasting, send MIP register requirement (MIP Registration Req) message to the GGSN/FA node.
Step 212:GGSN/FA node sends MIPRegistration Req message to the ownership entity of portable terminal in the 3GPP network.
Step 213: the ownership entity returns MIP register response (MIP Registration Resp) message to the GGSN/FA node after portable terminal current home address (Home Address) and Care-of Address are preserved in this locality.
If Care-of Address is the address of portable terminal, at this moment, will set up the MIP tunnel between ownership entity and portable terminal; If Care-of Address is the GGSN/FA address of node in the 3GPP network, at this moment, will set up the MIP tunnel between ownership entity and GGSN/FA node.
Step 214:GGSN/FA node returns to portable terminal with MIP Registration Resp message, accomplishes the registration process of portable terminal in the 3GPP network.
In register flow path shown in Figure 2; The portable terminal that relates to is a portable terminal of supporting the MIP technology; If when using the portable terminal of not supporting the MIP technology, portable terminal will not send the MIP login request message to the GGSN/FA node in the step 211, but have the entity of MIP agent functionality in the network side increase; Like MIP agent node (Proxy-MIP), replace portable terminal to send the MIP login request message to the GGSN/FA node.
As shown in Figure 3, be portable terminal process registration schematic flow sheet in the WiMAX network, this register method may further comprise the steps:
Step 301: portable terminal inserts the WiMAX network.
Step 302: portable terminal sends authentication request (Auth Req) message to aaa server and gives aaa server, has comprised mobile terminal identification in the Auth Req message.
Portable terminal need utilize aaa server to initiate authentication request when in the WiMAX network, registering, in the 3GPP network, also can utilize aaa server to initiate authentication request.In embodiments of the present invention; Aaa server that registration relates to the time in the 3GPP network and the aaa server that in the WiMAX network, relates to during registration can be aaa servers that can carry out authentication to the user and the equipment of 3GPP network and WiMAX network; This aaa server can be positioned at the 3GPP network side; Also can be positioned at the WiMAX network side, can also be an entity that independently can communicate with 3GPP network and WiMAX network.Perhaps, in the 3GPP network He in the WiMAX network, an aaa server that can carry out authentication to the user and the equipment of 3GPP network and WiMAX network is set respectively, to reach the purpose of portable terminal being carried out authentication.
Step 303:AAA server sends Auth Req message and gives HLR/HSS.
Step 304:HLR/HSS preserves mobile terminal identification, access-in point information, the portable terminal home agent nodal information in the WiMAX network etc. in this locality, and to aaa server return authentication response (Auth Resp) message.
In the present embodiment, the ownership entity is the home agent node.
No matter portable terminal is to register at the WiMAX network or in the 3GPP network, the entity that is used to preserve log-on message can be HLR/HSS, also can be that other can the 3GPP network and the entity that communicates of WiMAX network.
Step 305:AAA server returns to portable terminal with Auth Resp message, and the indicating mobile terminal authentication is passed through.
Step 306: the access service network gateway (ASN-GW/FA) with foreign agent functionality is to portable terminal broadcasting external agent information.
In the present embodiment, external entity is logic entity and access service network gateway integrated with foreign agent functionality.
Step 307: portable terminal obtains the relevant information of ASN-GW/FA node from external agent's information of broadcasting, send MIP register requirement (MIP Registration Req) message to the ASN-GW/FA node.
Step 308:ASN-GW/FA node sends MIP Registration Req message to the home agent node of portable terminal in the WiMAX network.
Step 309: the home agent node returns MIP register response (MIP Registration Resp) message to the ASN-GW/FA node after portable terminal current home address (Home Address) and Care-of Address are preserved in this locality.
Step 310:ASN-GW/FA node returns to portable terminal with MIP Registration Resp message, accomplishes the registration process of portable terminal in the WiMAX network.
In register flow path shown in Figure 3; The portable terminal that relates to is a portable terminal of supporting the MIP technology; If when using the portable terminal of not supporting the MIP technology; Portable terminal will not send the MIP login request message to the ASN-GW/FA node in the step 307, but replace portable terminal to send the MIP login request message to the ASN-GW/FA node by the MIP agent node (Proxy-MIP) that increases in the network.
According to scheme shown in Figure 2; In the 3GPP of embodiment of the invention network configuration; Traditional Gateway GPRS Support Node (GGSN) with have an external agent (Foreign Agent; FA) logic entity of function integrates, and becomes the Gateway GPRS Support Node (GGSN/FA) of supporting foreign agent functionality, and in the 3GPP network, has increased the ownership entity with home agent function.According to scheme shown in Figure 3; In the WiMAX of embodiment of the invention network configuration; ASN-GW has increased foreign agent functionality, becomes the access service network gateway (ASN-GW/FA) of supporting foreign agent functionality, simultaneously; Leave in order to reduce route distance, the ASN-GW/FA node can be positioned at the route place, border of WiMAX network and 3GPP network.
The method of the embodiment of the invention one is that the network (not supporting the network of MIP technology) of supporting MIP technological switches to the network (supporting the network of MIP technology) of not supporting the MIP technology; Below with portable terminal Fig. 2 and method shown in Figure 3 successfully register insert a certain network after; Judging the network handover operation that carries out when current state satisfies the network switching condition or receives switching command; Particularly, respectively with the 3GPP network switch to the WiMAX network, the WiMAX network switches to the 3GPP network and explains.
As shown in Figure 4, for portable terminal in the embodiment of the invention two switches to the signaling process sketch map of 3GPP network by the WiMAX network, this flow process is following:
Step 401: portable terminal is accomplished registration in the WiMAX network.
Step 402: portable terminal judges that current state satisfies the switching condition of setting or receives switching command, prepares to trigger switching to 3GPP.
In the present embodiment; When portable terminal is positioned at WiMAX and 3GPP network Zone switched, the information that detects the WiMAX network very a little less than, and the signal of 3GPP network is very strong; Be better than the signal of WiMAX network like the 3GPP signal, think that then current state satisfies the switching condition of setting.
Step 403: portable terminal sends to the ASN-GW/FA node and switches (HO Request) message, and request switches to other network.
Step 404:ASN-GW/FA node returns handoff response (HO Response) message to portable terminal, agrees that portable terminal switches to other networks from the WiMAX network.
Step 405: portable terminal inserts the 3GPP network through wireless network.
Step 406: portable terminal is initiated Auth Req message to SGSN.
Said Auth Req message comprises mobile terminal identification and source network sign, and the expression portable terminal is to switch to the 3GPP network from the WiMAX network.
Step 407:SGSN sends to HLR/HSS, the requesting query relevant information with said Auth Req message.
Step 408:HLR/HSS inquires the relevant information of portable terminal and source network, and returns to SGSN.
Step 409:SGSN judges according to the relevant information that receives whether this handoff procedure is legal, if legal then carry out subsequent operation, otherwise, switching flow stopped.
Judge whether legal method comprises handoff procedure: judge at first whether source network is identical network with the purpose network; If identical network; The operation of then carrying out is not by the handoff procedure of the network of supporting the MIP technology to the network of not supporting the MIP technology, can not carry out scheme of the present invention; If not identical network, then continue to judge that whether source network is legal network, if source network is a legitimate network, judges further then whether portable terminal has the authority of handover network, if having, thinks that then current handoff procedure is legal.
In the present embodiment; SGSN can confirm the information of portable terminal at the ownership entity of source network from the Auth Req message that portable terminal sends; Because source network is the WiMAX network; Therefore belonging to entity can be the home agent node, also can in this step, find out the log-on message of portable terminal in source network, and therefrom confirms the home agent nodal information of portable terminal at source network.
Step 410:SGSN returns to portable terminal with Auth Resp message.
Step 406 in the present embodiment to step 410 utilizes SGSN that portable terminal is carried out authentication; Also be not limited to utilize aaa server to initiate the method for authentication in the present embodiment; Specifically comprise: aaa server sends Auth Req message, the relevant information of this portable terminal of requesting query and source network to HLR/HSS; HLR/HSS returns to aaa server with Auth Resp message, carries the relevant information of portable terminal and source network in the message; Aaa server returns to SGSN with Auth Resp message, confirms finally whether current switching flow is legal, and the Auth Resp message that will comprise authentication result returns to portable terminal.
Step 411: portable terminal sends requesting activation PDP Context (Active PDP Context Req) message to the SGSN node.
Step 412:SGSN node sends requesting activation PDP Context message to the GGSN/FA of correspondence node, comprises the home agent nodal information of portable terminal in source network that finds out in this message.
Step 413:GGSN/FA node is after portable terminal is created corresponding PDP Context, returns to the SGSN node and activates response (Active PDP Context Resp) message.
Step 414:SGSN node returns to portable terminal with Active PDP Context Resp message.
Step 415:GGSN/FA node is to portable terminal broadcasting external agent information.
Step 416: portable terminal obtains the relevant information of GGSN/FA node from external agent's information of broadcasting, send MIP register requirement (MIP Registration Req) message to the GGSN/FA node.
Step 417:GGSN/FA node sends MIP Registration Req message to the home agent node that inquires.
Step 418: said home agent node returns MIP register response (MIP Registration Resp) message to the GGSN/FA node after preserving the Care-of Address of portable terminal in this locality.
Suppose that the Care-of Address in the present embodiment is the GGSN/FA address of node, then set up the MIP tunnel between GGSN/FA node and HA.
Step 419:GGSN/FA node returns to portable terminal with MIP Registration Resp message.
Step 420:GGSN/FA node sends to switch to the ASN-GW/FA node accomplishes (HO Complete) message.
Step 421:GGSN/FA node discharges the Internet resources between portable terminal and WiMAX, accomplishes to switch.
In the embodiment of the invention two; If comprised the home agent nodal information of portable terminal in the WiMAX network in the Auth Req message that portable terminal is initiated in step 406; Then when definite handoff procedure is legal; HLR/HSS can not return the home agent nodal information, and the SGSN node carries out subsequent operation according to the home agent nodal information that receives.
Method through the embodiment of the invention two; Before network switches; After the packet that sends to portable terminal routes to the home agent node; MIP tunnel through between ASN-GW/FA node and the home agent node is forwarded to the ASN-GW/FA node with packet, is transmitted to portable terminal by the ASN-GW/FA node again.Behind the network handover success; External packet route to switch before identical home agent node, the MIP tunnel through between newly-established GGSN/FA node and the home agent node is forwarded to the GGSN/FA node with packet; And then packet is forwarded to portable terminal through the SGSN node and the Radio Access Network of correspondence; Like this, for the packet that will send to portable terminal, all be to transmit through identical home agent node; Just external IP address is constant, and the business of portable terminal when network switches just can not interrupted.
To be portable terminals switch to the signaling process of WiMAX network by the 3GPP network to the embodiment of the invention three, and as shown in Figure 5, this flow process is following:
Step 501: portable terminal is accomplished registration in the 3GPP network.
Step 502: portable terminal judges that current state satisfies the switching condition of setting or receives switching command, prepares to trigger switching to WiMAX.
Step 503: portable terminal sends to wireless access network and switches (HO Request) message, and request switches to other network.
Step 504: wireless access network returns handoff response (HO Response) message to portable terminal, agrees that portable terminal switches to other networks from the WiMAX network.
Step 505: portable terminal inserts the WiMAX network through the ASN-GW/FA node.
Step 506: portable terminal is initiated Auth Req message to aaa server.
Step 507:AAA server sends to HLR/HSS, the requesting query relevant information with said Auth Req message.
Step 508:HLR/HSS inquires the relevant information of portable terminal and source network, and returns to aaa server.
Step 509:AAA server judges according to the relevant information that receives whether this handoff procedure is legal, if legal then carry out subsequent operation, otherwise, switching flow stopped.
Aaa server judges that whether legal handoff procedure method identical with the method for embodiment two steps 509.
Step 510:AAA server returns to portable terminal with Auth Resp message.
Step 511:ASN-GW/FA node is to portable terminal broadcasting external agent information.
Step 512: portable terminal obtains the relevant information of ASN-GW/FA node from external agent's information of broadcasting, send MIP register requirement (MIP Registration Req) message with new Care-of Address to the ASN-GW/FA node.
The ownership entity of step 513:ASN-GW/FA node in the source network that inquires sends MIP Registration Req message.
Step 514: the ownership entity returns MIP register response (MIP Registration Resp) message to the ASN-GW/FA node after Care-of Address is preserved in this locality, set up and the internodal MIP of ASN-GW/FA tunnel.
Suppose that the Care-of Address in the present embodiment is the ASN-GW/FA address of node, then set up the MIP tunnel between ASN-GW/FA node and HA.
Step 515:ASN-GW/FA node returns to portable terminal with MIP Registration Resp message.
Step 516:ASN-GW/FA node sends to switch to wireless access network accomplishes (HO Complete) message.
Step 517: wireless access network discharges the Internet resources between portable terminal and 3GPP, accomplishes and switches.
In the embodiment of the invention three; If comprised the information of the ownership entity of portable terminal in the 3GPP network in the Auth Req message that portable terminal is initiated in step 506; Then in step 509; When definite handoff procedure was legal, HLR/HSS can not return the information of ownership entity, and the ASN-GW/FA node carries out subsequent operation according to the information of the ownership entity that receives.
Method through the embodiment of the invention three; Before network switches; After packet routes to the ownership entity in the 3GPP network; MIP tunnel through between GGSN/FA node and the ownership entity is forwarded to the GGSN/FA node with packet, and SGSN node and the Radio Access Network through correspondence is forwarded to portable terminal with packet again.Behind the network handover success, packet routes to identical ownership entity, and the MIP tunnel through between newly-established ASN-GW/FA node and the ownership entity is forwarded to the ASN-GW/FA node with packet, and then is forwarded to portable terminal.
The embodiment of the invention four is to belong to a kind of communication system under the same design with the embodiment of the invention one, two and three; As shown in Figure 6; This communication system comprises: portable terminal 11, be applied to the webserver 12 in the purpose network, be applied to the webserver 13 and the memory device 14 of source network; Wherein: portable terminal 11 is used in the webserver that is applied to source network 13 registrations, and when needed, the webserver 12 is initiated the network handoff request in being applied to the purpose network; Be applied to that the webserver 12 is used to receive said network handoff request in the purpose network; Confirm the ownership entity that portable terminal utilizes when in source network, carrying out data-bag interacting with other networks with home agent function; And, for said portable terminal and the said ownership entity of confirming connect, perhaps; Confirm to have in the purpose network external entity of foreign agent functionality, and set up being connected of said ownership entity and the external entity of confirming.
The said webserver 13 that is applied to source network is used for the log-on message that portable terminal produces is kept at the memory device 14 of communication system when self registers, said log-on message comprises the information of mobile terminal identification, source network sign and the ownership entity of portable terminal in source network.Said memory device 14 be can be applied to the equipment that the webserver in the purpose network 12 and the webserver 13 that is applied to source network communicate.
Particularly, the said purpose network of network server 12 that is applied to is used for when said network handoff request comprises the information that belongs to entity, confirms corresponding ownership entity according to the information of the ownership entity that receives; When comprising the sign of mobile terminal identification and source network in the said network handoff request; Confirm the log-on message that portable terminal produces according to the information in the network handoff request that receives when source network is registered, and therefrom confirm the information of the ownership entity of said portable terminal in source network.
The embodiment of the invention five is to belong to a kind of webserver under the same design with other embodiment of the present invention; As shown in Figure 7; This web server application is in first network; Comprise: module 23 is set up in receiver module 21, ownership entity determination module 22 and tunnel, and wherein: receiver module 21 is used for the network handoff request that mobile terminal receive sends; Ownership entity determination module 22 is used for the ownership entity with home agent function that definite portable terminal utilizes when source network carries out data-bag interacting with other networks; The tunnel is set up module 23 and is used to said portable terminal and connects with the said ownership entity of confirming; Perhaps; Confirm the external entity with foreign agent functionality of portable terminal in the purpose network, and set up being connected of said ownership entity and the external entity of confirming.
The said webserver also comprises log-on message preservation module 24; Be used for preserving the log-on message that portable terminal produces when source network is registered, said log-on message comprises the information of mobile terminal identification, source network sign and the ownership entity of portable terminal in source network.
Said ownership entity determination module 22 is used for when said network handoff request comprises the information that belongs to entity, confirms corresponding ownership entity according to the information of the ownership entity that receives; When comprising the sign of mobile terminal identification and source network in the said network handoff request, preserve the information that inquires the ownership entity of portable terminal in source network the module from said log-on message.
The method, communication system and the webserver that provide through the embodiment of the invention; Make the portable terminal IP address that portable terminal outwards shows when supporting the network that MIP is technological and do not support to switch between the technological network of MIP constant in network switching front and back; Owing to kept the above communication of IP layer constant; Therefore; The packet that is sent to portable terminal all routes to identical ownership entity, through the newly-established MIP of purpose network tunnel packet is forwarded to portable terminal then, has guaranteed continuity professional when network switches.In present communication network; Though the 3GPP network can be the data service that the user provides relative high speed; But its speed still lags behind the bearer rate of WiMAX network, therefore, lets portable terminal between 3GPP network and WiMAX network, switch and can better network support be provided for broadband services.Simultaneously, the present invention program is less to the mobile management framework influence of 3GPP network and WiMAX network internal, realizes that cost is low.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the method that portable terminal switches between network is characterized in that, this method comprises:
The network handoff request that purpose network mobile terminal receive is initiated, and confirm the ownership entity that said portable terminal utilizes when in source network, carrying out data-bag interacting with other networks with home agent function;
The purpose network is that portable terminal connects with the ownership entity of confirming, perhaps,
Confirm to have in the purpose network external entity of foreign agent functionality, and set up being connected of said ownership entity and the external entity of confirming;
Wherein:
Said purpose network is World Interoperability for Microwave Access, WiMax network WiMAX, and said source network is the 3GPP network, and perhaps said purpose network is the 3GPP network, and said source network is WiMAX;
Said ownership entity is home agent node HA in WiMAX, is the Gateway GPRS Support Node with home agent function in the 3GPP network;
Said external entity is the access service network gateway ASN-GW/FA with foreign agent functionality in the WiMAX network, is the Gateway GPRS Support Node with foreign agent functionality in the 3GPP network.
2. the method for claim 1 is characterized in that, when comprising the information that belongs to entity in the said network handoff request, the information of the network based ownership entity that receives of purpose is confirmed corresponding ownership entity.
3. the method for claim 1 is characterized in that, before the network handoff request that purpose network mobile terminal receive is initiated, said method also comprises:
Mobile terminal request is registered in source network;
After succeeding in registration, the log-on message that source network produces when generating mobile terminal registers, said log-on message comprises the sign of mobile terminal identification, source network and the information of said ownership entity.
4. method as claimed in claim 3 is characterized in that,
When comprising the sign of mobile terminal identification and source network in the said network handoff request, the sign of the network based portable terminal that receives of purpose and the sign of source network are confirmed the log-on message of portable terminal in source network;
From the log-on message of confirming, inquire the information of the ownership entity of portable terminal in source network.
5. a communication system is characterized in that, this system comprises:
Portable terminal is used to initiate the network handoff request;
Be applied to purpose network of network server, be used to receive said network handoff request, confirm the ownership entity that portable terminal utilizes when in source network, carrying out data-bag interacting with other networks with home agent function, and,
For said portable terminal and the said ownership entity of confirming connect, perhaps, confirm to have in the purpose network external entity of foreign agent functionality, and set up being connected of said ownership entity and definite external entity;
Wherein:
Said purpose network is World Interoperability for Microwave Access, WiMax network WiMAX, and said source network is the 3GPP network, and perhaps said purpose network is the 3GPP network, and said source network is WiMAX;
Said ownership entity is home agent node HA in WiMAX, is the Gateway GPRS Support Node with home agent function in the 3GPP network;
Said external entity is the access service network gateway ASN-GW/FA with foreign agent functionality in the WiMAX network, is the Gateway GPRS Support Node with foreign agent functionality in the 3GPP network.
6. communication system as claimed in claim 5 is characterized in that,
The said purpose network of network server that is applied to specifically is used for when said network handoff request comprises the information that belongs to entity, confirms corresponding ownership entity according to the information of the ownership entity that receives.
7. communication system as claimed in claim 5 is characterized in that said communication system also comprises the webserver that is applied in the source network;
Said portable terminal also is used in being applied to the webserver of source network, registering;
The said webserver that is applied in the source network; Be used for after succeeding in registration; The log-on message that produces when generating mobile terminal registers; And said log-on message is kept in the memory device of communication system, said log-on message comprises the information of mobile terminal identification, source network sign and said ownership entity;
Said memory device be can be applied in the source network the webserver be applied to the equipment that the webserver in the purpose network communicates.
8. communication system as claimed in claim 7 is characterized in that,
The said purpose network of network server that is applied to; Specifically be used for when said network handoff request comprises the sign of mobile terminal identification and source network; Confirm the log-on message that portable terminal produces according to the information in the network handoff request that receives when source network is registered, and therefrom confirm the information of the ownership entity of said portable terminal in source network.
9. a webserver is characterized in that, the said webserver comprises:
Receiver module is used for the network handoff request that mobile terminal receive sends;
Ownership entity determination module is used for the ownership entity with home agent function of confirming that portable terminal utilizes when source network carries out data-bag interacting with other networks;
Connect and set up module; Being used to said portable terminal connects with the said ownership entity of confirming; Perhaps, confirm the external entity with foreign agent functionality of portable terminal in the purpose network, and set up being connected of said ownership entity and the external entity of confirming;
Wherein:
Said purpose network is World Interoperability for Microwave Access, WiMax network WiMAX, and said source network is the 3GPP network, and perhaps said purpose network is the 3GPP network, and said source network is WiMAX;
Said ownership entity is home agent node HA in WiMAX, is the Gateway GPRS Support Node with home agent function in the 3GPP network;
Said external entity is the access service network gateway ASN-GW/FA with foreign agent functionality in the WiMAX network, is the Gateway GPRS Support Node with foreign agent functionality in the 3GPP network.
10. the webserver as claimed in claim 9 is characterized in that,
Said entity determination module specifically is used for when said network handoff request comprises the information that belongs to entity, confirms corresponding ownership entity according to the information of the ownership entity that receives.
11. the webserver as claimed in claim 9 is characterized in that, the said webserver also comprises:
Log-on message is preserved module, is used for preserving the log-on message that portable terminal generates when source network is registered, and said log-on message comprises the information of the ownership entity in mobile terminal identification, source network sign and the source network.
12. the webserver as claimed in claim 11 is characterized in that,
Said ownership entity determination module specifically is used for when said network handoff request comprises the sign of mobile terminal identification and source network, preserves the information that inquires the ownership entity in the source network the module from said log-on message.
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| CN111246530B (en) | 2020-02-06 | 2022-10-18 | 北京小米移动软件有限公司 | Network switching method and device and storage medium |
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