CN103327549A - Method and system for switching access networks, mobile terminal and link management server - Google Patents
Method and system for switching access networks, mobile terminal and link management server Download PDFInfo
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- CN103327549A CN103327549A CN2012100819273A CN201210081927A CN103327549A CN 103327549 A CN103327549 A CN 103327549A CN 2012100819273 A CN2012100819273 A CN 2012100819273A CN 201210081927 A CN201210081927 A CN 201210081927A CN 103327549 A CN103327549 A CN 103327549A
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Abstract
The invention discloses a method for switching access networks. The method for switching the access networks comprises the steps that communication is carried out between a mobile terminal and a service server through a link management server, interaction is carried out between the mobile terminal and the link management server when the mobile terminal needs to be switched to a second access network from a first access network under the situation that the mobile terminal carries out communication with the link management server through a first link in the first access network, so that the mobile terminal and the link management server are switched to a second link in the second access network to carry out communication from the first link. The invention further and correspondingly discloses a system for switching the access networks, the mobile terminal and the link management server. According to the method and system for switching the access networks, the mobile terminal and the link management server, the link management server can maintain link connection with the service server in the switching process of the access networks, service interruption can be avoided in the switching process of the access networks, and system stability can be improved.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of Access Network changing method and system, portable terminal, link management server.
Background technology
Because the surge of cellphone subscriber's quantity has caused the mobile communication network system to be in the overload operation state, this final result will cause mobile phone to be easy to occur being similar to when communication going offline, cross-talk, speech quality are bad, be difficult to the phenomenon of the failure such as online.In order to solve top phenomenon of the failure, there are now increasing mobile phone operators and manufacturer to come to realise this point, and constantly take measures on customs clearance and come further dilatation cell phone network system, voice quality when improving mobile communication, so many mobile phone manufacturers have released bimodulus even multi mode terminal, the user can freely be switched between different Access Networks, thereby can effectively avoid in the past call drop, the problems such as conversation difficulty and lower tone.
But, in the prior art, general employing was " direct-cut operation " when mobile phone switched between different Access Networks, namely disconnect first former link, set up again new link, although service outage duration only is the hundreds of millisecond during link switching, people can't feel under normal circumstances, but, in case when mobile phone can't be set up new link because entering blind zone or channel busy, call drop will produce.In addition, the Access Network switching also may cause service terminal continually, affects the user and experiences, with WLAN (Wireless Local Area Networks; WLAN) bimodulus or multi mode terminal are example; because a lot of public places all provide free WLAN access; so, provide the bimodulus of WLAN function or multi mode terminal may need between WLAN and mobile network, to switch continually, thereby easily cause the interruption of some business.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of Access Network changing method and system, portable terminal, link management server, can avoid the service disconnection in the Access Network handoff procedure, improves the stability of a system.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of Access Network changing method, portable terminal communicates by link management server and service server, and the method comprises:
In the situation of portable terminal by the first link in the first Access Network and link management server communication, if need to switch to the second Access Network from the first Access Network, then described portable terminal and link management server carry out alternately, and described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated.
In IP address of mobile terminal, portable terminal port numbers, purpose IP address, the destination slogan that portable terminal links by the first Access Network and the second Access Network and the foundation of the link management server situation identical with host-host protocol, the method specifically comprises:
Portable terminal need to switch to the second Access Network from the first Access Network, and then described portable terminal sends handover request by described the first chain road direction link management server;
After described link management server is received described handover request, close described the first link;
Described portable terminal is by the second link between the foundation of the second Access Network and the described link management server;
Communicate by described the second link between described link management server and the described portable terminal.
After described link management server was received described handover request, the method also comprised: the link management server keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal;
Described portable terminal set up by the second Access Network and described link management server between the second link after, the method also comprises: described link management server sends to described portable terminal with the business datum that the service server of buffer memory sends to described portable terminal by described the second link.
In the different situation of the IP address of mobile terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server and/or portable terminal port numbers and/or purpose IP address and/or destination slogan and/or host-host protocol, the method specifically comprises:
Portable terminal need to switch to the second Access Network from the first Access Network, and then described portable terminal is by the second link between the foundation of the second Access Network and the link management server;
Described portable terminal sends handover request to described link management server;
After described link management server is received described handover request, communicate by described the second link and portable terminal.
After described link management server communicated by the second link and portable terminal, the method also comprises: portable terminal or link server were initiatively closed described the first link.
Described portable terminal sends handover request to described link management server:
Described portable terminal sends handover request by the described link management server of described the first chain road direction, and described handover request is indicated the second link information, perhaps,
Described portable terminal sends handover request by the described link management server of described the second chain road direction, and described handover request is indicated the first link information.
Described handover request is the existing business message after newly-increased message or the expansion.
The link information of described handover request indicating comprises the link identification information of being determined by the data flow five-tuple, and described five-tuple comprises: IP address of mobile terminal, portable terminal port numbers, purpose IP address, destination slogan and host-host protocol,
Perhaps, the link information of described handover request indicating comprises one or more in the described five-tuple.
The method also comprises: described link management server receives that described handover request is within the switching time that communicates by described the second link and portable terminal, described link management server sends to service server the business datum of described portable terminal and transmits by described the first link, perhaps, described link management server keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal, by described the second link the business datum that the service server of buffer memory sends to described portable terminal is sent to described portable terminal again after successful switch communicates to described the second link.
A kind of portable terminal, this portable terminal comprises switching judging module, communication module and link control module; Wherein,
Described switching judging module is used for judging whether to carry out Access Network and switches;
Described communication module, be used for communicating with the link management server, and need to carry out in the situation that Access Network switches judging by the first link in the first Access Network and link management server communication and switching judging module, carry out alternately with the link management server, described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated;
Described link control module is used for setting up described the second link by described the second Access Network when portable terminal need to switch to the second Access Network from the first Access Network.
In the IP address of terminal that links of portable terminal by the first Access Network and the second Access Network and the foundation of link management server, terminal prot number, purpose IP address, the destination slogan situation identical with host-host protocol, described communication module specifically is used for:
When the judgement of switching judging module need to switch to the second Access Network from the first Access Network, send handover request by described the first chain road direction link management server;
After receiving the notice of described the first link of link management server closing, the notifying link control module is by the second link between the foundation of the second Access Network and the described link management server;
Adopt described the second link and described link management server to communicate.
In the different situation of the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server and/or terminal prot number and/or purpose IP address and/or destination slogan and/or host-host protocol, described communication module specifically is used for:
When the judgement of switching judging module need to switch to the second Access Network from the first Access Network, the notifying link control module was by the second link between the foundation of the second Access Network and the link management server;
Send handover request to described link management server;
Adopt described the second link and described link management server to communicate.
Described link control module also is used for adopting after described the second link and described link management server communicate in communication module, closes described the first link.
Described communication module specifically is used for sending handover request by the described link management server of described the first chain road direction, described handover request is indicated the second link information, perhaps, send handover request by the described link management server of described the second chain road direction, described handover request is indicated the first link information.
A kind of link management server, this link management server comprises communication module and link control module; Wherein,
Described communication module is used for alternately with portable terminal and service server, realizes communicating by letter between portable terminal and the service server; And at portable terminal by the first link in the first Access Network and link management server communication and need to switch in the situation of the second Access Network from the first Access Network, mutual with described portable terminal, described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated;
Described link control module, the link that is used between control and the portable terminal is opened or is closed.
In the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server, terminal prot number, purpose IP address, the destination slogan situation identical with host-host protocol, described communication module specifically is used for:
After receiving the handover request of portable terminal, the notifying link control module is closed described the first link;
And the second link of setting up by portable terminal between the described portable terminal communicates.
This link management server also comprises cache module, be used for after receiving described handover request, the buffer memory service server sends to the business datum of described portable terminal, and described portable terminal set up by the second Access Network and described link management server between the second link after, the business datum that the service server of buffer memory is sent to described portable terminal sends to described portable terminal by described the second link.
In the different situation of the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server and/or terminal prot number and/or purpose IP address and/or destination slogan and/or host-host protocol, described communication module specifically is used for:
After receiving the handover request of portable terminal, set up by the second Access Network by portable terminal and described link management server between the second link and portable terminal communicate.
Described link control module also is used for closing described the first link after described link management server communicates by the second link and portable terminal.
This link management server also comprises cache module, be used for receiving that at the link management server described handover request is within the switching time that communicates by described the second link and portable terminal, keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal, and by communication module the business datum that the service server of buffer memory sends to described portable terminal is sent to described portable terminal again after successful switch communicates to described the second link.
Described communication module, also be used for receiving described handover request within the switching time that communicates by described the second link and portable terminal at the link management server, the business datum that service server is sent to described portable terminal is transmitted by described the first link.
A kind of Access Network switched system, this system comprises above-mentioned portable terminal, above-mentioned link management server and service server.
Access Network changing method of the present invention and system, portable terminal, link management server, portable terminal communicates by link management server and service server, in the situation of portable terminal by the first link in the first Access Network and link management server communication, if need to switch to the second Access Network from the first Access Network, then described portable terminal and link management server carry out alternately, and described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated.By the present invention, the link management server is kept service server and the link connection between it in the Access Network handoff procedure, thereby can avoid the service disconnection in the Access Network handoff procedure, improves the stability of a system.
Description of drawings
Fig. 1 is Access Network changing method schematic flow sheet of the present invention;
Fig. 2 is a kind of Access Network changing method of embodiment of the invention schematic flow sheet;
Fig. 3 is the another kind of Access Network changing method of embodiment of the invention schematic flow sheet;
Fig. 4 is Access Network switched system structural representation of the present invention.
Embodiment
Basic thought of the present invention is: portable terminal communicates by link management server and service server, the link management server can be communicated by letter with service server by multiple bearer network form, directly be linked into service server such as the IP network form, perhaps be linked into service server by mobile network GSM, UMTS, LTE, CMDA or WLAN, WiMax indirect mode.It also can be multiple wireless access way between mobile network and the link management server.In the situation of portable terminal by the first link in the first Access Network and link management server communication, if need to switch to the second Access Network from the first Access Network, then described portable terminal and link management server carry out alternately, and described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated.
Fig. 1 is Access Network changing method schematic flow sheet of the present invention, and as shown in Figure 1, the method comprises:
Step 101: in the situation of portable terminal by the first link in the first Access Network and link management server communication, need to switch to the second Access Network from the first Access Network.
Among the present invention, portable terminal communicates by link management server and service server.
Step 102: described portable terminal and link management server carry out alternately, and described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated.
Fig. 2 is a kind of Access Network changing method of embodiment of the invention schematic flow sheet, and as shown in Figure 2, the method comprises:
Step 201: portable terminal need to switch to the second Access Network from the first Access Network, and then described portable terminal sends handover request by described the first chain road direction link management server;
The present embodiment can be applied to portable terminal and set up the identical scene of IP address of mobile terminal, portable terminal port numbers, purpose IP address, destination slogan and host-host protocol (referring to TCP or UDP) that links by the first Access Network and the second Access Network and link management server, this link five-tuple or title data flow five-tuple, for explaining conveniently, this paper will be also referred to as link based on the data flow of UDP.
Step 202: after described link management server is received described handover request, close described the first link;
Step 203: described portable terminal is by the second link between the foundation of the second Access Network and the described link management server;
Step 204: communicate by described the second link between described link management server and the described portable terminal.
In the present embodiment, portable terminal based on the second Access Network set up with the link management server between second link, because it is consistent with the first link of before application switching to set up the five-tuple of the second link, so the link management server is routed to original terminal links in this new link connection naturally.
Optionally, after described link management server is received described handover request, keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal; Described portable terminal set up by the second Access Network and described link management server between the second link after, described link management server sends to described portable terminal with the business datum that the service server of buffer memory sends to described portable terminal by described the second link.
Fig. 3 is the another kind of Access Network changing method of embodiment of the invention schematic flow sheet, and as shown in Figure 3, the method comprises:
Step 301: portable terminal need to switch to the second Access Network from the first Access Network, and then described portable terminal is by the second link between the foundation of the second Access Network and the link management server;
The present embodiment can be applicable to portable terminal, and to set up the IP address of mobile terminal that links and/or portable terminal port numbers and/or purpose IP address and/or destination slogan and/or host-host protocol by the first Access Network and the second Access Network and link management server be the different scene of five-tuple.
Step 302: described portable terminal sends handover request to described link management server;
Here, described portable terminal to described link management server send handover request can for:
Described portable terminal sends handover request by the described link management server of described the first chain road direction, described handover request is indicated the second link information, perhaps, described portable terminal sends handover request by the described link management server of described the second chain road direction, and described handover request is indicated the first link information.
Wherein, handover request indicate the second link information can for: indicate one or more or link identification number in five-tuple information corresponding to the second link (link identification number can be the sign that both sides are scheduled to, also can be server end (or client) socket corresponding with this link number).
Handover request indicate the first link information can for: indicate one or more in five-tuple information corresponding to the first link, perhaps link identification number.
Step 303: after described link management server is received described handover request, communicate by described the second link and portable terminal.
In order to realize the present invention, can on portable terminal, operational communications act on behalf of, communication agent can be an independently application, task (one or more processes or thread) on also can terminal, also can refer to a functional module, for explaining conveniently, the present invention will be called communication agent for terminal applies provides module or the system task of the relevant communication function of the various links of application layer, " link " between communication agent and the link management server can adopt towards (TCP) stateful agreement that links, also can be the stateless agreement towards link, can also be the agreement without (UDP) of link.
Need to prove, after described link management server communicated by the second link and portable terminal, the method also comprised: close described the first link.Particularly, the link management server receives after the handover request, retrieves the relevant service data information of this terminal at buffering area, on the second link and after the terminal communication, can disconnect the first link of setting up at the source Access Network with terminal by link server, also can disconnect the first link by terminal.
Need to prove, described link management server receives that described handover request is within the switching time that communicates by described the second link and portable terminal, described link management server sends to service server the business datum of described portable terminal and transmits by described the first link, perhaps, described link management server keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal, by described the second link the business datum that the service server of buffer memory sends to described portable terminal is sent to described portable terminal again after successful switch communicates to described the second link.
Need to prove, handover request described in the present invention can be the existing business message after newly-increased message or the expansion, the information of switching as carrying indication in the login request message, optionally, the link information of described handover request indicating is by the well-determined link identification information of data flow five-tuple, perhaps, the link information of described handover request indicating comprises one or more in the described five-tuple.
Need to prove, if be based on the agreement towards state between portable terminal and the link management server, such as IMAP, then continue follow-up communication according to the information such as protocol status that keep.
Need to prove, all schemes are all based on IP address and the port numbers of server side before and after switching among the present invention, and agreement (such as TCP, UDP etc.) is constant.The first Access Network is respectively two kinds of different networks with the second Access Network, and for example, the first Access Network is WLAN, and the second Access Network is the mobile network, and perhaps, the first Access Network is the mobile network, and the second Access Network is WLAN (wireless local area network) or wireless MAN.
The present invention has also correspondingly proposed a kind of portable terminal, and this portable terminal comprises switching judging module, communication module and link control module; Wherein,
Described switching judging module is used for judging whether to carry out Access Network and switches; Concrete, the switching judging module is obtained Access Network (such as WLAN, mobile network's) signal energy value, determine that by the switchover policy that sets in advance whether needing to carry out Access Network switches, perhaps, according to the switchover policy of subscribing, as, certain Access Network priority access principle, perhaps, whether needs carry out the Access Network switching according to user's operation judges.
Described communication module, be used for communicating with the link management server, and need to carry out in the situation that Access Network switches judging by the first link in the first Access Network and link management server communication and switching judging module, carry out alternately with the link management server, described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated;
Described link control module is used for setting up described the second link by described the second Access Network when portable terminal need to switch to the second Access Network from the first Access Network.
Optionally, in the IP address of terminal that links of portable terminal by the first Access Network and the second Access Network and the foundation of link management server, terminal prot number, purpose IP address, the destination slogan situation identical with host-host protocol, described communication module specifically is used for:
When the judgement of switching judging module need to switch to the second Access Network from the first Access Network, send handover request by described the first chain road direction link management server;
After receiving the notice of described the first link of link management server closing, the notifying link control module is by the second link between the foundation of the second Access Network and the described link management server;
Adopt described the second link and described link management server to communicate.
Optionally, in the different situation of the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server and/or terminal prot number and/or purpose IP address and/or destination slogan and/or host-host protocol, described communication module specifically is used for:
When the judgement of switching judging module need to switch to the second Access Network from the first Access Network, the notifying link control module was by the second link between the foundation of the second Access Network and the link management server;
Send handover request to described link management server;
Adopt described the second link and described link management server to communicate.
Optionally, described link control module also is used for adopting after described the second link and described link management server communicate in communication module, closes described the first link.
Optionally, described communication module specifically is used for sending handover request by the described link management server of described the first chain road direction, described handover request is indicated the second link information, perhaps, send handover request by the described link management server of described the second chain road direction, described handover request is indicated the first link information.
The present invention has also correspondingly proposed a kind of link management server, and this link management server comprises communication module and link control module; Wherein,
Described communication module is used for alternately with portable terminal and service server, realizes communicating by letter between portable terminal and the service server; And at portable terminal by the first link in the first Access Network and link management server communication and need to switch in the situation of the second Access Network from the first Access Network, mutual with described portable terminal, described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated;
Described link control module, the link that is used between control and the portable terminal is opened or is closed.
Optionally, the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server, terminal prot number, purpose IP address, destination slogan are identical with host-host protocol, be that described communication module specifically is used in the identical situation of data flow five-tuple:
After receiving the handover request of portable terminal, the notifying link control module is closed described the first link;
And the second link of setting up by portable terminal between the described portable terminal communicates.
Optionally, this link management server also comprises cache module, be used for after receiving described handover request, the buffer memory service server sends to the business datum of described portable terminal, and described portable terminal set up by the second Access Network and described link management server between the second link after, the business datum that the service server of buffer memory is sent to described portable terminal sends to described portable terminal by described the second link.
Optionally, it is that described communication module specifically is used in the different situation of data flow five-tuple that portable terminal is set up the IP address of terminal that links and/or terminal prot number and/or purpose IP address and/or destination slogan and/or host-host protocol by the first Access Network and the second Access Network and link management server:
After receiving the handover request of portable terminal, set up by the second Access Network by portable terminal and described link management server between the second link and portable terminal communicate.
Optionally, described link control module also is used for closing described the first link after described link management server communicates by the second link and portable terminal.
Optionally, this link management server also comprises cache module, be used for receiving that at the link management server described handover request is within the switching time that communicates by described the second link and portable terminal, keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal, and by communication module the business datum that the service server of buffer memory sends to described portable terminal is sent to described portable terminal again after successful switch communicates to described the second link.
Optionally, described communication module, also be used for receiving described handover request within the switching time that communicates by described the second link and portable terminal at the link management server, the business datum that service server is sent to described portable terminal is transmitted by described the first link.
The present invention has also correspondingly proposed a kind of Access Network switched system, and as shown in Figure 4, this system comprises above-mentioned portable terminal, above-mentioned link management server and service server.
Based on system shown in Figure 4, when portable terminal switches (otherwise or) from mobile network to WLAN, link between link management server and the service server is kept, within than the short period, terminal is finished the Access Network switching, based on the link of keeping between link management server and the service server in switching time, the business of portable terminal can be recovered.
Below in conjunction with specific embodiment technical scheme of the present invention is described in further detail.
Embodiment 1
The present embodiment is described in detail implementation procedure of the present invention based on the IMAP extension protocol of IMAP agreement (or based on).
In order to guarantee that terminal IMAP uses the switching user provide seamless and experiences, user interface can keep original user interface content in network break period.For example, the user switches when browsing the inbox content, and so, this moment, interface content kept legacy data constant.The automatic refresh function of mailbox is cancelled temporarily or is provided information indicating, but displaying contents keeps front consistent with interruption.
Receive the handover request of terminal when the link management server, if handover request based target link sends, then handover request can the carried terminal identification parameter; If handover request is sent by non-target link or former link, handover request can be carried the identification number of former link and target link.
Need to prove, handover request can be carried the identification number of link.
Need to prove, handover request can the carried terminal identification number.
Need to prove, handover request can be independent a piece of news, also can with the existing business message reuse, carry " switching " implication by special parameter, such as log messages Login or the Authenticate instruction of IMAP; The link management server is found to have had communication link with terminal through the retrieval coupling, then the temporary informations such as protocol status that respond in the buffering area is associated with newly-established the link.
Embodiment 2
The present embodiment is described in detail implementation procedure of the present invention based on Session Initiation Protocol.
In order to guarantee that terminal SIP uses the switching user provide seamless and experiences, user interface can keep original user interface content in network break period.For example, the user switches when browsing the instant message content, and so, this moment, interface content kept legacy data constant.The automatic refresh function of messaging list is cancelled temporarily or is provided information indicating, but displaying contents keeps front consistent with interruption.
Receive the handover request of terminal when the link management server, need to prove, handover request can be independent a piece of news, also can with the existing business message reuse, carry " switching " implication by special parameter, for example the recipient address of SIP registration or message related to calls is the link management server identification; If handover request based target link sends, then handover request can the carried terminal identification parameter; If handover request is sent by non-target link and former link, the link management server can only be established as decision principle in service end according to certain application of a terminal, find through the retrieval coupling whether the client instance of representative exists, if exist, then the temporary informations such as protocol status that respond in the buffering area be associated with newly-established the link.This parameter also can for carrying the field of " switching " information, determine whether to retrieve coupling according to this field.
Need to prove, the present invention is equally applicable to bimodulus or the multimode terminal of WLAN, Wimax, GSM, CDMA, WCDMA, TD_SCDMA, LTE etc. these standards.
Can find out, the invention provides a kind of multi-mode terminal service continuity processing scheme, introduce a link management server, when multi-module mobile terminal switches between different Access Networks, service communication between link management server and the service server normally keeps, when portable terminal need to target access network rebulid and the link management server between link the time, send handover request to the link management server, so that this portable terminal continues to communicate by letter based on newly-established link with the link management server, be that the message that the link management server will be received from from service server sends to portable terminal through new link, and will receive from the message on the newly-established link and send to service server, solved because Access Network switches and caused service terminal, therefore the user who causes experiences relatively poor problem, keep professional continuity, and then improved user's experience.
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (22)
1. an Access Network changing method is characterized in that, portable terminal communicates by link management server and service server, and the method comprises:
In the situation of portable terminal by the first link in the first Access Network and link management server communication, if need to switch to the second Access Network from the first Access Network, then described portable terminal and link management server carry out alternately, and described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated.
2. method according to claim 1, it is characterized in that, in IP address of mobile terminal, portable terminal port numbers, purpose IP address, the destination slogan that portable terminal links by the first Access Network and the second Access Network and the foundation of the link management server situation identical with host-host protocol, the method specifically comprises:
Portable terminal need to switch to the second Access Network from the first Access Network, and then described portable terminal sends handover request by described the first chain road direction link management server;
After described link management server is received described handover request, close described the first link;
Described portable terminal is by the second link between the foundation of the second Access Network and the described link management server;
Communicate by described the second link between described link management server and the described portable terminal.
3. method according to claim 2 is characterized in that,
After described link management server was received described handover request, the method also comprised: the link management server keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal;
Described portable terminal set up by the second Access Network and described link management server between the second link after, the method also comprises: described link management server sends to described portable terminal with the business datum that the service server of buffer memory sends to described portable terminal by described the second link.
4. method according to claim 1, it is characterized in that, in the different situation of the IP address of mobile terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server and/or portable terminal port numbers and/or purpose IP address and/or destination slogan and/or host-host protocol, the method specifically comprises:
Portable terminal need to switch to the second Access Network from the first Access Network, and then described portable terminal is by the second link between the foundation of the second Access Network and the link management server;
Described portable terminal sends handover request to described link management server;
After described link management server is received described handover request, communicate by described the second link and portable terminal.
5. method according to claim 4 is characterized in that, after described link management server communicated by the second link and portable terminal, the method also comprises: portable terminal or link server were initiatively closed described the first link.
6. method according to claim 4 is characterized in that, described portable terminal sends handover request to described link management server and is:
Described portable terminal sends handover request by the described link management server of described the first chain road direction, and described handover request is indicated the second link information, perhaps,
Described portable terminal sends handover request by the described link management server of described the second chain road direction, and described handover request is indicated the first link information.
7. according to claim 2 to 6 each described methods, it is characterized in that, described handover request is the existing business message after newly-increased message or the expansion.
8. method according to claim 6, it is characterized in that, the link information of described handover request indicating comprises the link identification information of being determined by the data flow five-tuple, described five-tuple comprises: IP address of mobile terminal, portable terminal port numbers, purpose IP address, destination slogan and host-host protocol
Perhaps, the link information of described handover request indicating comprises one or more in the described five-tuple.
9. according to claim 4 to 6 each described methods, it is characterized in that, the method also comprises: described link management server receives that described handover request is within the switching time that communicates by described the second link and portable terminal, described link management server sends to service server the business datum of described portable terminal and transmits by described the first link, perhaps, described link management server keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal, by described the second link the business datum that the service server of buffer memory sends to described portable terminal is sent to described portable terminal again after successful switch communicates to described the second link.
10. a portable terminal is characterized in that, this portable terminal comprises switching judging module, communication module and link control module; Wherein,
Described switching judging module is used for judging whether to carry out Access Network and switches;
Described communication module, be used for communicating with the link management server, and need to carry out in the situation that Access Network switches judging by the first link in the first Access Network and link management server communication and switching judging module, carry out alternately with the link management server, described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated;
Described link control module is used for setting up described the second link by described the second Access Network when portable terminal need to switch to the second Access Network from the first Access Network.
11. portable terminal according to claim 10, it is characterized in that, in the IP address of terminal that links of portable terminal by the first Access Network and the second Access Network and the foundation of link management server, terminal prot number, purpose IP address, the destination slogan situation identical with host-host protocol, described communication module specifically is used for:
When the judgement of switching judging module need to switch to the second Access Network from the first Access Network, send handover request by described the first chain road direction link management server;
After receiving the notice of described the first link of link management server closing, the notifying link control module is by the second link between the foundation of the second Access Network and the described link management server;
Adopt described the second link and described link management server to communicate.
12. portable terminal according to claim 10, it is characterized in that, in the different situation of the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server and/or terminal prot number and/or purpose IP address and/or destination slogan and/or host-host protocol, described communication module specifically is used for:
When the judgement of switching judging module need to switch to the second Access Network from the first Access Network, the notifying link control module was by the second link between the foundation of the second Access Network and the link management server;
Send handover request to described link management server;
Adopt described the second link and described link management server to communicate.
13. portable terminal according to claim 12 is characterized in that,
Described link control module also is used for adopting after described the second link and described link management server communicate in communication module, closes described the first link.
14. portable terminal according to claim 12 is characterized in that,
Described communication module specifically is used for sending handover request by the described link management server of described the first chain road direction, described handover request is indicated the second link information, perhaps, send handover request by the described link management server of described the second chain road direction, described handover request is indicated the first link information.
15. a link management server is characterized in that, this link management server comprises communication module and link control module; Wherein,
Described communication module is used for alternately with portable terminal and service server, realizes communicating by letter between portable terminal and the service server; And at portable terminal by the first link in the first Access Network and link management server communication and need to switch in the situation of the second Access Network from the first Access Network, mutual with described portable terminal, described portable terminal and described link management server the second link from described the first link switching to the second Access Network is communicated;
Described link control module, the link that is used between control and the portable terminal is opened or is closed.
16. link management server according to claim 15, it is characterized in that, in the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server, terminal prot number, purpose IP address, the destination slogan situation identical with host-host protocol, described communication module specifically is used for:
After receiving the handover request of portable terminal, the notifying link control module is closed described the first link;
And the second link of setting up by portable terminal between the described portable terminal communicates.
17. link management server according to claim 16, it is characterized in that, this link management server also comprises cache module, be used for after receiving described handover request, the buffer memory service server sends to the business datum of described portable terminal, and described portable terminal set up by the second Access Network and described link management server between the second link after, the business datum that the service server of buffer memory is sent to described portable terminal sends to described portable terminal by described the second link.
18. link management server according to claim 15, it is characterized in that, in the different situation of the IP address of terminal that portable terminal links by the first Access Network and the second Access Network and the foundation of link management server and/or terminal prot number and/or purpose IP address and/or destination slogan and/or host-host protocol, described communication module specifically is used for:
After receiving the handover request of portable terminal, set up by the second Access Network by portable terminal and described link management server between the second link and portable terminal communicate.
19. link management server according to claim 18 is characterized in that, described link control module also is used for closing described the first link after described link management server communicates by the second link and portable terminal.
20. according to claim 18 or 19 described link management servers, it is characterized in that, this link management server also comprises cache module, be used for receiving that at the link management server described handover request is within the switching time that communicates by described the second link and portable terminal, keep with service server between communicate by letter, and the buffer memory service server sends to the business datum of described portable terminal, and by communication module the business datum that the service server of buffer memory sends to described portable terminal is sent to described portable terminal again after successful switch communicates to described the second link.
21. according to claim 18 or 19 described link management servers, it is characterized in that,
Described communication module, also be used for receiving described handover request within the switching time that communicates by described the second link and portable terminal at the link management server, the business datum that service server is sent to described portable terminal is transmitted by described the first link.
22. an Access Network switched system is characterized in that, this system comprises: each described portable terminal of claim 10 to 14, claim 15 to 21 each described link management server and service server.
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| CN2012100819273A CN103327549A (en) | 2012-03-23 | 2012-03-23 | Method and system for switching access networks, mobile terminal and link management server |
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| CN2012100819273A CN103327549A (en) | 2012-03-23 | 2012-03-23 | Method and system for switching access networks, mobile terminal and link management server |
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