CN103634853A

CN103634853A - Method, terminal and network side for requesting IP supporting mobility

Info

Publication number: CN103634853A
Application number: CN201210303980.3A
Authority: CN
Inventors: 骆文
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-08-24
Filing date: 2012-08-24
Publication date: 2014-03-12
Also published as: WO2013177954A1

Abstract

The invention provides a method for requesting an IP supporting mobility. The method comprises after an access router receives a request message sent by a terminal and for requesting the access router to allocate an IP address or prefix for the terminal, if the terminal has a capability of distinguishing IP addresses or prefixes that support mobility or do not support mobility, and the request message requests an IP address or prefix supporting mobility, the access router obtains the IP address or prefix supporting mobility and returns the IP address or prefix supporting mobility to the terminal. The invention also provides the terminal and a network side.

Description

A kind of acquisition request is supported method, terminal and the network side of ambulant IP

Technical field

The present invention relates to moving communicating field, relate in particular to a kind of acquisition request and support the method for ambulant IP address, terminal and network side.

Background technology

Well-known, in IP the Internet, terminal will be accessed IP the Internet, just must be from effective IP address of network application.This IP has double attribute, not only represents user's identity but also represent the residing network topology of user position.When user has acquired behind an IP address at certain topology location (such as under certain IAD), this IP address can only use at this topology location (as, can only in the scope of an IAD administration, use).This is no doubt no problem for fixed terminal, but for mobile terminal, and after terminal moves to the scope of another IAD administration from the scope of an IAD administration, above-mentioned IP address can become an invalid address.Now, terminal must be obtained a new IP address from new topology location again.So just cannot guarantee the continuity of IP-based upper-layer service, for example terminal use is beating IP phone, and this call is crossed and can be broken.

In order to address this problem, industry has proposed a series of solutions, popular mobile management technology comprises Mobile IP (Mobile IP, MIP), proxy-mobile IP (Proxy MIP, PMIP), general tunnel encapsulation agreement (Generic Tunnel Protocol, GTP) etc.As shown in Figure 1, the common feature of these technology is to have introduced fixed anchor point (Anchor) to realize the mobile management to mobile node.For example, MIP agreement is used home agent (Home agent, HA) as anchor point, PMIP agreement, use local mobile anchor point (Local Mobility Anchor, LMA) as anchor point, GTP, use Gateway GPRS Support Node (Gateway GPRS Support Node, GGSN) as anchor point.The common feature of these technology is when terminal is attached to couple in router (couple in router A as shown in Figure 1), couple in router is this terminal special route is set, between this couple in router self and the anchor point network element of terminal, set up a tunnel, and be terminal distribution IP address by this anchor point network element.All like this these terminals that send to, and terminal sends to extraneous IP message all by above-mentioned tunnel, to carry out route.

In the network of actual deployment, according to relevant statistics, only have small part application need network mobility support (as, VoIP, game on line etc.), and the application of most of mobile terminal does not need.Existing mobile management technology is the demand of distinguishing terminal application not, but unifies to provide above-mentioned mobile management support for terminal.Now, for those, do not use the above-mentioned terminal that needs the application of network mobility support, network there is no need to provide ambulant support for these terminals, otherwise not only wasted system resource (as, for terminal distribution anchor point network element, set up tunnel unnecessary between couple in router and this anchor point, as shown in Figure 1), and the path of the roundabout terminal receipts of meeting transmitting IP packet (, cause the route roundabout), as shown in Figure 1, IP message must forward by anchor point network element.The roundabout one side of route has increased the time delay of receiving and dispatching IP packet between terminal and opposite end, is unfavorable for improving user's business experience; Also can waste on the other hand the transmission bearer resource of operator.For used the terminal that needs mobility support and do not need mobility support simultaneously, all data traffics also all must pile warp anchor point, has increased the performance requirement to anchor point, is unfavorable for cost-saving.

Summary of the invention

Method, terminal and network side that the technical problem to be solved in the present invention provides a kind of acquisition request to support mobility IP, solving existingly provides mobility support to all terminals, causes the problem of the wasting of resources.

In order to address the above problem, the invention provides a kind of method that acquisition request is supported mobility IP, comprising:

After couple in router receives the described couple in router of request that terminal sends and is the request message of described terminal distribution IP address or prefix, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is to support ambulant IP address or prefix, described couple in router obtains and supports ambulant IP address or prefix, and returns to described support ambulant IP address or prefix to described terminal.

Further, said method also can have following characteristics, described method also comprises: when described couple in router returns to described support ambulant IP address or prefix to described terminal, also carry attribute information, inform described in described terminal that IP address or prefix are to support ambulant IP address or prefix.

Further, said method also can have following characteristics, described method also comprises, described couple in router receives after described request message, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is not support ambulant IP address or prefix, described couple in router be described terminal distribution do not support ambulant IP address or prefix and to described terminal, return described in do not support ambulant IP address or prefix.

Further, said method also can have following characteristics, described method also comprises: if described terminal does not possess the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, described couple in router receives after described request message, obtains and supports ambulant IP address or prefix and return to described support ambulant IP address or prefix to described terminal.

Further, said method also can have following characteristics, and described couple in router judges in the following way one or a combination set of whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing:

Described couple in router according in described request message, whether carry described terminal need which kind of IP address the indication of prefix determine whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing;

Whether described couple in router, carries default ability indication and determines whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing during first to described couple in router acquisition request IP address or prefix according to described terminal;

When described couple in router networks according to described terminal initial, whether declare described terminal and possess differentiation support mobility and do not support the ability of ambulant IP address or prefix to determine whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing;

Described couple in router knows from preserving the network element of the contextual information of described terminal whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing.

Further, said method also can have following characteristics, described method also comprises: described terminal is from described couple in router is switched to target couple in router, described target couple in router obtains IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, the anchor point network element of described target couple in router and this terminal carries out alternately, upgrading the mobility context of this terminal; Otherwise, described target couple in router initiate to notify this terminal discharge this IP address prefix; Or described target couple in router is notified described couple in router, by described couple in router, initiated to notify this terminal to discharge this IP address or prefix.

Further, said method also can have following characteristics, and described target couple in router judges according to following mode whether the IP address of the current use of described terminal or prefix support mobility:

Described target couple in router, when obtaining the IP address of the current use of described terminal or prefix, obtains IP address or the prefix of the current use of described terminal simultaneously and whether supports ambulant information; Or described target couple in router determines according to local configuration information whether the IP address of the current use of described terminal or prefix support mobility.

Further, said method also can have following characteristics, and described couple in router obtains described support ambulant IP address or prefix in the following way:

What described couple in router judgement described request message was asked is while supporting ambulant IP address or prefix, mutual with anchor point network element, receive described support ambulant IP address or prefix that described anchor point network element is described terminal distribution, and return to described terminal.

Further, said method also can have following characteristics, and described couple in router obtains described IP address or prefix in the following way:

Described couple in router is to support ambulant IP address or prefix described in described terminal distribution;

Described method also comprises:

Described couple in router sends the IP address of this terminal and the positional information of described terminal to location management server.

Further, said method also can have following characteristics, and described method also comprises:

Described couple in router is received when described terminal sends to the data message of opposite end, if ambulant IP address or prefix are not supported in the current use in described opposite end, described couple in router directly sends described data message; If ambulant IP address or prefix are supported in the current use in described opposite end, described couple in router adopts based on the method for routing of end position is sent to described data message.

Further, said method also can have following characteristics, described method also comprises: in described terminal from described couple in router is switched to target couple in router, described target couple in router obtains IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, described target couple in router upgrades the positional information of described terminal to described location management server; Otherwise described target couple in router initiates to notify this terminal to discharge IP address or the prefix of the current use of described terminal; Or described target couple in router notifies described couple in router to be initiated IP address or the prefix of notifying this terminal to discharge current use by described couple in router.

Further, said method also can have following characteristics, and described couple in router is gateway general packet wireless service support node GGSN;

Described couple in router obtains supports ambulant IP address or prefix, and returns to described support ambulant IP address or prefix comprises to described terminal:

Described GGSN supports ambulant IP address or prefix described in described terminal distribution, described support ambulant IP address or prefix are sent to service universal grouping wireless serving GPRS support node SGSN, by described SGSN, to described terminal, return to described support ambulant IP address or prefix;

Described method also comprises:

Described GGSN sends the positional information of described support ambulant IP address or prefix and described terminal to location management server.

Further, said method also can have following characteristics, and described method also comprises, when described GGSN sends to described SGSN by described support ambulant IP address or prefix, also carry attribute information, inform described in described SGSN that IP address or prefix are for supporting ambulant IP address or prefix;

Described SGSN is recorded in this IP address or prefix and described attribute information in the PDP Context information of described terminal.

When described terminal switches, from described SGSN, be switched to target SGSN, when described target SGSN or GGSN are the non-described GGSN of target GGSN of described terminal selection, described target SGSN or GGSN judge whether the IP address of described terminal or prefix support mobility:

To supporting ambulant IP address or prefix, described target SGSN or GGSN trigger described target GGSN and for this, support ambulant IP address or prefix and create corresponding PDP Context, upgrade the positional information of this terminal to location management server;

To not supporting ambulant IP address or prefix, described target SGSN or GGSN initiate deexcitation and do not support ambulant IP address or PDP Context corresponding to prefix.

Further, said method also can have following characteristics, described terminal is switched to target SGSN from described SGSN, and when described target SGSN or described GGSN are the non-described GGSN of target GGSN of described terminal selection, described target GGSN judges whether the IP address of described terminal or prefix support mobility:

To supporting ambulant IP address or prefix, described target GGSN upgrades the positional information of this terminal to location management server;

To not supporting ambulant IP address or prefix, described target GGSN initiates not support ambulant IP address or PDP Context corresponding to prefix described in deexcitation.

Further, said method also can have following characteristics, and whether IP address or prefix that described target GGSN obtains the current use of described terminal according to following mode support mobility:

Described target GGSN receives after the establishment PDP Context request message of described target SGSN transmission, sends request, to obtain other contextual informations relevant to the PDP Context that will create to described GGSN; Receive the response message that described GGSN returns, in described response message, carry IP address or the prefix support that described PDP Context is corresponding or do not support ambulant indication;

Or described GGSN receives after the renewal PDP Context request of described target SGSN, push contextual information to described target GGSN, carry IP address or the prefix of the current use of described terminal and whether support ambulant indication.

Further, said method also can have following characteristics, described terminal is switched to the process of target SGSN from described SGSN, described target SGSN receives after the redirect request of described SGSN transmission, judges whether the IP address of the described terminal of carrying in described redirect request or prefix support mobility:

To supporting ambulant IP address or prefix, described target SGSN and target radio network controller are mutual, support ambulant IP address or PDP Context corresponding to prefix set up radio bearer resources for this;

To not supporting ambulant IP address or prefix, described target SGSN is indicated described in described SGSN deexcitation and is not supported ambulant IP address or PDP Context corresponding to prefix.

Further, said method also can have following characteristics, described terminal is switched to the process of target SGSN from described SGSN, described SGSN sends before redirect request to described target SGSN, whether the IP address or the prefix that judge described terminal support mobility, to support ambulant IP address or PDP Context corresponding to prefix to send to described target SGSN by described redirect request, to not supporting ambulant IP address or prefix, described SGSN initiates deexcitation and does not support ambulant IP address or PDP Context corresponding to prefix.

Further, said method also can have following characteristics, and described couple in router is grouped data network gateway P-GW;

Described P-GW supports ambulant IP address or prefix described in described terminal distribution, described support ambulant IP address or prefix are sent to mobile management entity MME by gateway S-GW, by described MME, to described terminal, return to described support ambulant IP address or prefix;

Described method also comprises:

Described P-GW sends the positional information of described support ambulant IP address or prefix and described terminal to location management server.

Further, said method also can have following characteristics, and when described terminal is initiated to switch, the MME of described terminal judges whether the IP address of described terminal or prefix support mobility:

To not supporting ambulant IP address or prefix, described in initiating to delete, described MME do not support ambulant IP address or packet data network PDN context corresponding to prefix;

To supporting ambulant IP address or prefix, it is that described support ambulant IP address or prefix create PDN context that described MME triggers at the target P-GW of described terminal, upgrades the positional information of this terminal to location management server.

Further, said method also can have following characteristics, described terminal is initiated to switch, from described S-GW is switched to target S-GW, when described target S-GW or described P-GW are the non-described P-GW of target P-GW of described terminal selection, described target S-GW or described P-GW judge whether the IP address of described terminal or prefix support mobility:

To supporting ambulant IP address or prefix, described target S-GW or P-GW trigger described target P-GW and support ambulant IP address or prefix establishment PDN context for this, upgrade the positional information of this terminal to location management server;

To not supporting ambulant IP address or prefix, described target S-GW or P-GW initiate to delete this and do not support ambulant IP address or PDN context corresponding to prefix.

Further, said method also can have following characteristics, and described terminal is switched to the process of target P-GW from described P-GW, and described target P-GW judges whether the IP address of described terminal or prefix support mobility:

To not supporting ambulant IP address or prefix, described in initiating to delete, described target P-GW do not support ambulant IP address or PDN context corresponding to prefix;

To supporting ambulant IP address or prefix, described P-GW upgrades the positional information of described terminal to described location management server.

The present invention also provides a kind of network side, comprise: couple in router, described couple in router is used for: after receiving the described couple in router of request of self terminal to be the request message of described terminal distribution IP address or prefix, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is to support ambulant IP address or prefix, obtain and support ambulant IP address or prefix, and return to described support ambulant IP address or prefix to described terminal.

Further, above-mentioned network side also can have following characteristics, described couple in router also for: while returning to described support ambulant IP address or prefix to described terminal, carry attribute information, inform described in described terminal that IP address or prefix are to support ambulant IP address or prefix.

Further, above-mentioned network side also can have following characteristics, described couple in router also for, receive after described request message, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is not support ambulant IP address or prefix, for described terminal distribution do not support ambulant IP address or prefix and to described terminal, return described in do not support ambulant IP address or prefix.

Further, above-mentioned network side also can have following characteristics, described couple in router also for, described couple in router receives after described request message, if described terminal does not possess, do not distinguish the ability of supporting mobility and not supporting ambulant IP address or prefix, obtain and support ambulant IP address or prefix and return to described support ambulant IP address or prefix to described terminal.

Further, above-mentioned network side also can have following characteristics, and described couple in router is for judging in the following way one or a combination set of whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing:

According in described request message, whether carry described terminal need which kind of IP address the indication of prefix determine whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing;

According to described terminal, during first to described couple in router acquisition request IP address or prefix, whether carry default ability indication and determine whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing;

While networking according to described terminal initial, whether declare described terminal and possess differentiation support mobility and do not support the ability of ambulant IP address or prefix to determine whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing;

From preserving the network element of the contextual information of described terminal, know whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing.

Further, above-mentioned network side also can have following characteristics, and described network side also comprises target couple in router, wherein:

Described target couple in router is used for, when described terminal is switched to described target couple in router from described couple in router, obtain IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, the anchor point network element of described target couple in router and this terminal carries out alternately, upgrading the mobility context of this terminal; Otherwise, described target couple in router initiate to notify this terminal discharge this IP address prefix or, described target couple in router is notified described couple in router, by described couple in router, is initiated to notify this terminal to discharge this IP address or prefix.

Further, above-mentioned network side also can have following characteristics, and described target couple in router is for judging according to following mode whether the IP address of the current use of described terminal or prefix support mobility:

Further, above-mentioned network side also can have following characteristics, and described couple in router obtains described support ambulant IP address or prefix in the following way:

What described couple in router judgement described request message was asked is while supporting ambulant IP address or prefix, mutual with anchor point network element, receive described support ambulant IP address or prefix that described anchor point network element is described terminal distribution, and return to described support ambulant IP address or prefix to described terminal.

Further, above-mentioned network side also can have following characteristics, and described couple in router obtains described IP address or prefix in the following way:

Described couple in router also for: to location management server, send the IP address of this terminal and the positional information of described terminal.

Further, above-mentioned network side also can have following characteristics, described couple in router also for: while receiving that described terminal sends to the data message of opposite end, if ambulant IP address or prefix are not supported in the current use in described opposite end, described couple in router directly sends described data message; If ambulant IP address or prefix are supported in the current use in described opposite end, described couple in router adopts based on the method for routing of end position is sent to described data message.

Described target couple in router is used for, in described terminal, from described couple in router, be switched to described target couple in router, described target couple in router obtains IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, described target couple in router upgrades the positional information of described terminal to described location management server; Otherwise, described target couple in router initiates to notify this terminal to discharge IP address or the prefix of the current use of described terminal, or described target couple in router notifies described couple in router to be initiated IP address or the prefix of notifying this terminal to discharge current use by described couple in router.

Further, above-mentioned network side also can have following characteristics, and described couple in router is gateway general packet wireless service support node GGSN:

Described GGSN is used for, for described in described terminal distribution, support ambulant IP address or prefix, described support ambulant IP address or prefix are sent to service universal grouping wireless serving GPRS support node SGSN, by described SGSN, to described terminal, return to described support ambulant IP address or prefix; And, to location management server, send the positional information of described support ambulant IP address or prefix and described terminal.

Further, above-mentioned network side also can have following characteristics, and described network side also comprises described SGSN, wherein:

Described GGSN also for, when described support ambulant IP address or prefix are sent to described SGSN, carry attribute information, inform described in described SGSN that IP address or prefix are for supporting ambulant IP address or prefix;

Described SGSN is used for, and this IP address or prefix and described attribute information are recorded in the PDP Context information of described terminal.

Further, above-mentioned network side also can have following characteristics, described GGSN also for, when described terminal switches, from described SGSN, be switched to target SGSN, when described GGSN is the non-described GGSN of target GGSN of described terminal selection, described GGSN judges whether the IP address of described terminal or prefix support mobility:

To supporting ambulant IP address or prefix, described target GGSN triggers described target GGSN and for this, supports ambulant IP address or prefix and create corresponding PDP Context, upgrades the positional information of this terminal to location management server;

To not supporting ambulant IP address or prefix, described GGSN initiates deexcitation and does not support ambulant IP address or PDP Context corresponding to prefix.

Further, above-mentioned network side also can have following characteristics, and described network side also comprises target SGSN, wherein:

Described target SGSN is used for, when described terminal switches, from described SGSN is switched to described target SGSN, when described SGSN is the non-described GGSN of target GGSN of described terminal selection, described target SGSN judges whether the IP address of described terminal or prefix support mobility:

To supporting ambulant IP address or prefix, described target SGSN triggers described target GGSN and for this, supports ambulant IP address or prefix and create corresponding PDP Context, upgrades the positional information of this terminal to location management server;

To not supporting ambulant IP address or prefix, described target SGSN is initiated deexcitation and is not supported ambulant IP address or PDP Context corresponding to prefix.

Further, above-mentioned network side also can have following characteristics, and described network side also comprises target GGSN, wherein:

Described target GGSN is used for: when described terminal is switched to target SGSN from described SGSN, and when described target SGSN or described GGSN are the non-described GGSN of described target GGSN of described terminal selection, judge whether the IP address of described terminal or prefix support mobility:

Further, above-mentioned network side also can have following characteristics, and whether IP address or prefix that described target GGSN obtains the current use of described terminal according to following mode support mobility:

Or, receive the contextual information that described GGSN pushes, in described contextual information, carry IP address or the prefix of the current use of described terminal and whether support ambulant indication.

Described target SGSN is used for, in described terminal, from described SGSN, be switched to the process of described target SGSN, receive after the redirect request of described SGSN transmission, judge whether the IP address of the described terminal of carrying in described redirect request or prefix support mobility:

Further, above-mentioned network side also can have following characteristics, described network side also comprises SGSN, described SGSN is used for, in described terminal, from described SGSN, be switched to the process of target SGSN, described SGSN sends before redirect request to described target SGSN, whether the IP address or the prefix that judge described terminal support mobility, to support ambulant IP address or PDP Context corresponding to prefix to send to described target SGSN by described redirect request, to not supporting ambulant IP address or prefix, described SGSN initiates deexcitation and does not support ambulant IP address or PDP Context corresponding to prefix.

Further, above-mentioned network side also can have following characteristics, and described couple in router is grouped data network gateway P-GW;

Described P-GW is used for: for described in described terminal distribution, support ambulant IP address or prefix, described support ambulant IP address or prefix are sent to mobile management entity MME by gateway S-GW, by described MME, to described terminal, return to described support ambulant IP address or prefix; And, to location management server, send the positional information of described support ambulant IP address or prefix and described terminal.

Further, above-mentioned network side also can have following characteristics, and described network side also comprises MME, and described MME is used for, and when described terminal is initiated to switch, judges whether the IP address of described terminal or prefix support mobility:

To not supporting ambulant IP address or prefix, described in initiating to delete, described MME do not support ambulant IP address or PDN context corresponding to prefix;

Further, above-mentioned network side also can have following characteristics, described P-GW also for, in described terminal, initiate to switch, described P-GW be described terminal select the non-described P-GW of target P-GW time, judge whether the IP address of described terminal or prefix support mobility:

To supporting ambulant IP address or prefix, described P-GW triggers described target P-GW and supports ambulant IP address or prefix establishment PDN context for this, upgrades the positional information of this terminal to location management server;

To not supporting ambulant IP address or prefix, described P-GW initiates to delete this and does not support ambulant IP address or PDN context corresponding to prefix.

Further, above-mentioned network side also can have following characteristics, and described network side also comprises target S-GW, wherein:

Described target S-GW is used for, and in described terminal, from described S-GW, is switched to described target S-GW, when described target S-GW is the non-described P-GW of target P-GW of described terminal selection, judges whether the IP address of described terminal or prefix support mobility:

To supporting ambulant IP address or prefix, described target S-GW triggers described target P-GW and supports ambulant IP address or prefix establishment PDN context for this, upgrades the positional information of this terminal to location management server;

To not supporting ambulant IP address or prefix, described target S-GW initiates to delete this and does not support ambulant IP address or PDN context corresponding to prefix.

Further, above-mentioned network side also can have following characteristics, described network side also comprises target P-GW, and described target P-GW is used for: described terminal is switched to the process of target P-GW from described P-GW, judges whether the IP address of described terminal or prefix support mobility:

The present invention also provides a kind of acquisition request to support the method for mobility IP, comprising:

Terminal sends a request message to couple in router, and asking described couple in router is that described terminal distribution is supported ambulant IP address or prefix.

The present invention also provides a kind of terminal, and described terminal is used for: to couple in router, send a request message, asking described couple in router is that described terminal distribution is supported ambulant IP address or prefix.

In the present invention, terminal need to from Network Capture support ambulant IP address during prefix, just to network request, obtain.And only have those application that need mobility support just can receive transmitting IP packet based on above-mentioned IP Di Zhi prefix, also only have the flow of these application just to need pile warp anchor point, reduce greatly the flow that needs alternate route, alleviated the load of bearer network and the pressure of anchor point network element.

Accompanying drawing explanation

Fig. 1 is existing mobile management structure;

Fig. 2 is first embodiment of the present invention flow chart;

Fig. 3 is second embodiment of the present invention flow chart;

Fig. 4 is third embodiment of the present invention flow chart;

Fig. 5 is fourth embodiment of the present invention flow chart;

Fig. 6 is identity position separation figure;

Fig. 7 is fifth embodiment of the present invention flow chart;

Fig. 8 is sixth embodiment of the present invention flow chart;

Fig. 9 is 3G network Organization Chart;

Figure 10 is seventh embodiment of the present invention flow chart;

Figure 11 is eighth embodiment of the present invention flow chart;

Figure 12 is ninth embodiment of the present invention flow chart;

Figure 13 is tenth embodiment of the present invention flow chart;

Figure 14 is 11st embodiment of the present invention flow chart;

Figure 15 is LTE network architecture diagram;

Figure 16 is 12nd embodiment of the present invention flow chart;

Figure 17 is 13rd embodiment of the present invention flow chart;

Figure 18 is 14th embodiment of the present invention flow chart;

Figure 19 is 15th embodiment of the present invention flow chart.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be combination in any mutually.

The embodiment of the present invention provides a kind of acquisition request to support the method for mobility IP, comprising:

When wherein said couple in router returns to described support ambulant IP address or prefix to described terminal, also carry attribute information, inform described in described terminal that IP address or prefix are to support ambulant IP address or prefix.

Wherein, described method also comprises, described couple in router receives after described request message, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is not support ambulant IP address or prefix, described couple in router is that described terminal distribution is not supported ambulant IP address or prefix and returns to described terminal.

Wherein, described method also comprises: if described terminal does not possess the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, described couple in router receives after described request message, obtains and supports ambulant IP address or prefix and send to described terminal.

Wherein, described couple in router judges in the following way one or a combination set of whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing:

Under different frameworks, there is different realizations, concrete:

Under fixed anchor point framework, described couple in router obtains described support ambulant IP address or prefix in the following way:

Wherein, described terminal is from described couple in router is switched to target couple in router, described target couple in router obtains IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, the anchor point network element of described target couple in router and this terminal carries out alternately, upgrading the mobility context of this terminal; Otherwise, described target couple in router initiate to notify this terminal discharge this IP address prefix or, described target couple in router is notified described couple in router, by described couple in router, is initiated to notify this terminal to discharge this IP address or prefix.

Wherein, described target couple in router judges according to following mode whether the IP address of the current use of described terminal or prefix support mobility:

Described target couple in router, when obtaining the IP address of the current use of described terminal or prefix, obtains IP address or the prefix of the current use of described terminal simultaneously and whether supports ambulant information; Or described target couple in router determines according to local configuration information whether the IP address of the current use of described terminal or prefix support mobility.Certainly, this determination methods is also applicable under identity position separation and LTE and 3G framework.

Under identity position separation, comprising:

Described couple in router obtains described IP address or prefix in the following way:

Described method also comprises:

Wherein, in described terminal from described couple in router is switched to target couple in router, described target couple in router obtains IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, described target couple in router upgrades the positional information of described terminal to described location management server; Otherwise, described target couple in router initiates to notify this terminal to discharge IP address or the prefix of the current use of described terminal, or described target couple in router notifies described couple in router to be initiated IP address or the prefix of notifying this terminal to discharge current use by described couple in router.

The separation of identity position is applied under 3G framework:

Described couple in router is gateway general packet wireless service support node GGSN;

Described GGSN supports ambulant IP address or prefix described in described terminal distribution, and described support ambulant IP address or prefix are sent to service universal grouping wireless serving GPRS support node SGSN, by described SGSN, returns to described terminal;

Described method also comprises:

Wherein, in the packet data protocol PDP Context information that the described support ambulant IP address that described SGSN is described terminal distribution by described GGSN or prefix are kept at described terminal.Wherein, when described GGSN sends to described SGSN by described support ambulant IP address or prefix, also carry attribute information, inform described in described SGSN that IP address or prefix are for supporting ambulant IP address or prefix; Described SGSN is recorded in the described attribute information of this IP address or prefix in the PDP Context information of described terminal.

Wherein, while switching, trigger deexcitation and do not support ambulant IP address or PDP Context corresponding to prefix, for supporting ambulant IP address or prefix to create corresponding PDP Context, concrete triggering network element can be target SGSN, GGSN, target GGSN etc.

Wherein, when described terminal switches, from described SGSN, be switched to target SGSN, when described SGSN or GGSN are the non-described GGSN of target GGSN of described terminal selection, described target SGSN or GGSN judge whether the IP address of described terminal or prefix support mobility:

Wherein, described terminal is switched to target SGSN from described SGSN, and described target SGSN or described GGSN be described terminal select the non-described GGSN of target GGSN time, described target GGSN judges whether the IP address of described terminal or prefix support mobility:

Whether IP address or prefix that wherein, described target GGSN obtains the current use of described terminal according to following mode support mobility:

Wherein, described terminal is switched to the process of target SGSN from described SGSN, and described target SGSN receives after the redirect request of described SGSN transmission, judges whether the IP address of the described terminal of carrying in described redirect request or prefix support mobility:

Wherein, described terminal is switched to the process of target SGSN from described SGSN, described SGSN sends before redirect request to described target SGSN, whether the IP address or the prefix that judge described terminal support mobility, to support ambulant IP address or PDP Context corresponding to prefix to send to described target SGSN by described redirect request, to not supporting ambulant IP address or prefix, described SGSN initiates deexcitation and does not support ambulant IP address or PDP Context corresponding to prefix.

Identity location application is in LTE framework:

Described couple in router is grouped data network gateway P-GW;

Described P-GW supports ambulant IP address or prefix described in described terminal distribution, and described support ambulant IP address or prefix are sent to mobile management entity MME by gateway S-GW, by described MME, returns to described terminal;

Described method also comprises:

Wherein, while switching, trigger deexcitation and do not support ambulant IP address or PDN context corresponding to prefix, for supporting ambulant IP address or prefix to create corresponding PDN context, concrete triggering network element can be MME, target S-GW, P-GW, target P-GW etc.

When described terminal is initiated to switch, the MME of described terminal judges whether the IP address of described terminal or prefix support mobility:

Wherein, when described terminal is initiated to switch, when the target S-GW of described terminal or described P-GW are the non-described P-GW of target P-GW of described terminal selection, described target S-GW or described P-GW judge whether the IP address of described terminal or prefix support mobility:

Wherein, described terminal is switched to the process of target P-GW from described P-GW, and described target P-GW judges whether the IP address of described terminal or prefix support mobility:

The embodiment of the present invention also provides a kind of acquisition request to support the method for mobility IP, comprising:

The embodiment of the present invention also provides a kind of terminal, and described terminal is used for: to couple in router, send a request message, asking described couple in router is that described terminal distribution is supported ambulant IP address or prefix.

The embodiment of the present invention also provides a kind of network side.

Figure 2 shows that the first embodiment of the present invention, terminal needs use to support ambulant IP address during prefix, to network request distribute support ambulant IP address prefix.For example, when terminal use bring into use need the application of mobility support (as, in the time of VoIP), this application to terminal request (as, to the operating system request of terminal) obtain one and support ambulant IP address.If now, in terminal, also do not dispose this and support ambulant IP (that is, IP address prefix), initiate to network request support ambulant IP address prefix, specifically comprise the following steps:

Step 201: terminal sends a request message to couple in router, in order to ask couple in router be terminal distribution IP address prefix.Now, terminal is carried an indication in this message, in order to indicate couple in router be oneself distribute one support ambulant IP address prefix.

Step 202: after receiving above-mentioned request message, couple in router when viewing above-mentioned indication (, receive for request distribute to support ambulant IP address during the request message of prefix), further for this terminal determines that network allocation is to the anchor point network element of this terminal, and mutual with this anchor point network element, for this terminal is set up mobility context.The anchor point network element of terminal be terminal distribution IP address prefix, and by this IP address prefix return to couple in router.

What deserves to be explained is, mutual based on couple in router and above-mentioned anchor point network element, couple in router and anchor point network element are set up special route for this terminal.For example, between couple in router and anchor point network element for this terminal is set up tunnel (PMIP tunnel, MIP tunnel, GTP tunnel etc.).Like this terminal based on this IP address prefix send to opposite end IP message when arriving couple in router, by couple in router, by above-mentioned tunnel, send to anchor point network element, then send to opposite end by anchor point network element; Opposite end send to this IP address the IP message of prefix when arriving anchor point network element, by anchor point network element, by above-mentioned tunnel, send to couple in router, then send to terminal by couple in router.

Step 203: mutual by with anchor point network element, couple in router get distribute to terminal the ambulant IP of support address prefix.Couple in router returns to response message to terminal, carry above-mentioned IP address prefix.When carrying this IP Di Zhi prefix, also carry the attribute specification to this IP Di Zhi prefix, to inform that this IP Di Zhi of terminal prefix is to support ambulant IP Di Zhi prefix.

By the method for above-described embodiment, terminal need to from Network Capture support ambulant IP address during prefix, just to network request, obtain.In general, the demand of terminal based on application, described above having application while needing mobility support, terminal just to network request support ambulant IP address prefix.Only at this moment, network is just this terminal distribution anchor point network element, sets up special route etc.And, only have those application that need mobility support just can receive transmitting IP packet based on above-mentioned IP Di Zhi prefix, also only have the flow of these application just to need pile warp anchor point, reduced greatly the flow that needs alternate route, alleviated the load of bearer network and the pressure of anchor point network element.

Method described above, what deserves to be explained is, if the application in terminal does not require mobility support, terminal to network request distributing IP address preferably do not carry during prefix above-mentioned indication (or carry other indication in order to explanation request be do not support ambulant IP address prefix), couple in router be directly this terminal distribution IP address prefix (that is, do not support ambulant IP address prefix) return to terminal.When the IP Di Zhi prefix of terminal based on such received transmitting IP packet, can directly by this couple in router, receive and dispatch.

Also what deserves to be explained is, in said method, the IP address that requires terminal itself to identify to get prefix whether support mobility, generally need to change existing terminal (as, software and hardware upgrading etc.), couple in router will know that whether terminal has the ability that can identify these two kinds of IP Di Zhi prefixes, has following several method:

A kind of method is, terminal is during to couple in router acquisition request IP address, always in request message clear and definite carry indication oneself need which kind of IP address the indication of prefix, couple in router determines that according to above-mentioned indication this terminal has aforementioned capabilities; Otherwise if do not carry above-mentioned indication in request message, couple in router determines that this terminal does not have aforementioned capabilities.

Another kind method is, in terminal, during first to couple in router acquisition request IP address, carries another indication in request message, with illustrate oneself can distinguish above-mentioned two kinds (that is, support mobility, do not support mobility) IP addresses prefix.If do not carry this indication, couple in router determine this terminal can not distinguish above-mentioned two kinds of IP addresses prefix.

Or terminal also can be in initial network entry, to couple in router statement oneself can distinguish two kinds of IP addresses prefix; When terminal is not declared, couple in router acquiescence terminal does not have this ability.Another method is, terminal in initial network entry process, by oneself can distinguish above-mentioned two kinds of IP addresses the informing capability of prefix to the network element of preserving the contextual information of this terminal in network, as access authentication server, by this network element, preserve this information.Preferably, have aforementioned capabilities terminal carries indication explanation and oneself has this ability in sending to the message of said network element; Otherwise the terminal without aforementioned capabilities is not carried above-mentioned indication in sending to the message of said network element, while not carrying above-mentioned indication in the message that this NE Discovery is being received, judgement terminal do not have distinguish above-mentioned two kinds of IP addresses the ability of prefix.Like this, couple in router from the network element of the contextual information of above-mentioned this terminal of preservation can know this terminal whether have can identify these two kinds of IP addresses the ability of prefix.

Method based on above-mentioned, if determine terminal do not have distinguish above-mentioned two kinds of IP addresses the ability of prefix,, when receiving the message of terminal request distributing IP Di Zhi prefix, couple in router is that terminal request is supported ambulant IP Di Zhi prefix, and sends to terminal; Otherwise, according to the method described in above-mentioned steps 201-203 be terminal distribution support or do not support ambulant IP address prefix.

What deserves to be explained is, when terminal is not when supporting that ambulant IP Di Zhi prefix is received transmitting IP packet, path is: terminal <-> couple in router <-> opposite end; When terminal is received transmitting IP packet based on the ambulant IP Di Zhi prefix of support, path is: terminal <-> couple in router <-> anchor point network element <-> opposite end.

Preferably, in step 201, terminal to couple in router send route collection (Router Solicitation is called for short RS) message with request distributing IP address prefix, now terminal is carried above-mentioned various indication in this message; Couple in router is used routing broadcast (Router Advertisement is called for short RA) to reply terminal, carry distribute to terminal IP address prefix, and carry to this IP address the attribute specification of prefix.

Embodiment bis-

Figure 3 shows that the second embodiment of the present invention, described terminal because of the mobile scene of having switched the current couple in router adhering to, as being switched to target couple in router from source couple in router, specifically comprise following steps:

Step 301: terminal is switched to target couple in router from source couple in router.In general, target couple in router can be received the related news that derive from network (as, source couple in router) or terminal.

Step 302: target couple in router obtain the current use of terminal IP address prefix.In general, target couple in router can from the network element of source couple in router or above-mentioned preservation terminal contextual information, get distribute to this terminal IP address prefix.

Step 303-304: get above-mentioned IP address after prefix, target couple in router judge this IP address prefix whether support mobility.

If support ambulant IP address prefix, the anchor point network element of target couple in router and this terminal carries out alternately, to upgrade the mobility context of this terminal.Specifically, on target couple in router, be this IP address special route described in prefix setting steps 202, and upgrade the special route that arranged on anchor point network element (for example, between target couple in router and anchor point network element for this IP address prefix set up tunnel).If do not support ambulant IP address prefix, target couple in router initiate to notify this terminal discharge this IP address prefix; Or, target couple in router notification source couple in router, by the latter initiate to notify this terminal discharge this IP address prefix.

What deserves to be explained is, target couple in router get the current use of terminal IP address during prefix, as the network element of the above-mentioned contextual information from source couple in router or preservation terminal, can get simultaneously this IP address prefix whether support ambulant information, according to this information, target couple in router can determine this IP address prefix whether support mobility.Or target couple in router according to local configuration information determine above-mentioned IP address prefix be whether to support ambulant IP, for example, take 10 beginnings IP address prefix ambulant as supporting, ambulant for not supporting with 01 beginning.

Step 305: be switched to after target couple in router in terminal, target couple in router sends message to terminal, with the IP address of the current use of notification terminal the state of prefix.Now, in this message, carry support ambulant IP address prefix information with notification terminal can continue to use this IP address prefix, and preferably also carry this IP address the attribute information of prefix; This message is used before can also carried terminal do not support ambulant IP address prefix, and it is set to invalid, notification terminal discharge this IP address prefix.The message that target couple in router sends to terminal is above-mentioned RS message.

Now, in terminal based on do not support ambulant IP address the session (Session) of prefix can not normally communicate by letter with opposite end.Now, these sessions (or application) can to terminal request new do not support ambulant IP Di Zhi prefix (method as described in embodiment mono-, terminal is not supported ambulant IP Di Zhi prefix to target couple in router acquisition request).

Embodiment tri-

Fig. 4 is the third embodiment of the present invention, supposes that terminal use DynamicHost arranges agreement (Dynamic Host Configuration Protocol is called for short DHCP) to couple in router IP address requesting.Suppose that now couple in router, simultaneously as Dynamic Host Configuration Protocol server, specifically comprises the following steps:

Step 401: terminal sends DHCP to couple in router and finds (DHCP Discover) message, take ask as own distributing IP address prefix.Terminal is also carried the indication described in step 201 in this message, in order to indication request distribute to support ambulant IP prefix (or indication distribute do not support ambulant IP address prefix).

Step 402: couple in router receives after above-mentioned message, the IP address of judgement terminal request prefix types.If terminal request for supporting ambulant IP,, as described in step 202, the anchor point network element of couple in router and terminal is mutual, from anchor point network element obtain distribute to terminal IP address prefix, and special route is set for this terminal.

Step 403: couple in router returns to DHCP to terminal (DHCP Offer) message is provided, wherein carry distribute to terminal IP address prefix, carry simultaneously this IP address the attribute (support or do not support mobility) of prefix.

Step 404: terminal sends DHCP request (DHCP Request) message to couple in router, wherein carry above-mentioned distribution IP address prefix;

Step 405: couple in router returns to DHCP approval (DHCPACK) message, preferably carry above-mentioned distribution IP address prefix.

What deserves to be explained is, when receiving DHCP Discover message, if terminal request support ambulant IP address prefix, couple in router and anchor point network element ask alternately anchor point network element distributing IP address prefix during to terminal, couple in router and anchor point network element also can be at this moment for terminal do not arrange special route (setting up tunnel etc.).And after receiving the message of step 404, couple in router sends another message to anchor point network element again, take and trigger own and above-mentioned anchor point network element and special route is set as this terminal.

Also what deserves to be explained is, if terminal request for do not support ambulant IP address prefix, couple in router is without mutual with anchor point network element, oneself be directly this terminal distribution IP address prefix.

Embodiment tetra-

Fig. 5 is the fourth embodiment of the present invention, supposes terminal use DHCP agreement, and from source couple in router, is switched to target couple in router because of mobile, specifically comprises following steps:

Step 501: when terminal is switched to target couple in router, owing to access point being detected, change, terminal sends DHCP request to target couple in router, the IP address of distributing before carrying prefix, and preferably carry this IP address the attribute (support mobility or do not support mobility) of prefix.

Step 502: target couple in router judge the current use of terminal IP address prefix whether support mobility.Target couple in router can judge according to the attribute information carrying in above-mentioned DHCP request.

Step 503-504: if the IP address of judgement terminal prefix support mobility, the anchor point network element of target couple in router and terminal is mutual, as described in step 304, the special route having arranged on renewal anchor point network element.After mutual, target couple in router returns to DHCPACK message to terminal, preferably carry above-mentioned IP address prefix.Now, terminal can continue to use this support ambulant IP address prefix.

If judgement IP address of terminal prefix do not support mobility, target couple in router returns to DHCP to terminal and denies (DHCPNAK) message, refusal terminal continue to use this IP address prefix.Now, in terminal based on do not support ambulant IP address the application of prefix can not normally communicate by letter with opposite end.These application can to terminal request new do not support ambulant IP Di Zhi prefix (method as described in embodiment mono-, terminal is not supported ambulant IP Di Zhi prefix to target couple in router acquisition request).

What deserves to be explained is, as described in embodiment bis-, the network element that target couple in router also can be preserved contextual information from source couple in router or for terminal gets the IP Di Zhi prefix of the current use of terminal, and the attribute information of this IP Di Zhi prefix.Target couple in router can not rely on yet DHCP described in step 501 ask to obtain the current use of terminal IP address prefix information.Now, for supporting ambulant IP Di Zhi prefix, as above-mentioned steps 503, target couple in router and anchor point network element are mutual, and new routing information more.And for do not support ambulant IP address prefix, can not process yet, and wait until follow-up receive that terminal sends based on this do not support ambulant IP address during the IP message of prefix, directly abandon this message, with force terminal again initiate DHCP flow process with obtain IP address prefix.

In addition, what deserves to be explained is, the concrete message in embodiment tri-and four be take DHCPv4 agreement as example, is also applicable to DHCPv6 agreement.Use DHCP Solicit (request) message to substitute DHCP Discover, use DHCP Advertise to substitute DHCP Offer message, and use DHCP Reply (replying) to replace DHCPACK and DHCPNAK message.In DHCP Reply with concrete parameter distinguish be sure replying (corresponding DHCPACK) or negate reply (corresponding DHCPNAK), remaining principle is consistent.

Except traditional, as the mobile management technology of introducing in background technology, industry also has a kind of mobile management technology based on the separation of identity position.As shown in Figure 6, couple in router and location management server are the core network elements of this mobile management technology.The Main Function of couple in router is to be responsible for user's access, is user terminal distributing IP address; The effect of location management server is the IP address of recording user terminal and the relation of current location information of terminal, i.e. " IP address-position " corresponding relation of recording user terminal.Above-mentioned positional information is the IP address of the couple in router of the current connection of terminal.What deserves to be explained is, opposite end also needs to be linked into network by such couple in router.

In this mobile management technology, when data message arrives the couple in router (couple in router-opposite end shown in Fig. 6) of opposite end, the position of above-mentioned terminal is first determined in couple in router-opposite end.Suppose that current terminal is connected to couple in router A, tunnel encapsulation is carried out by data message in couple in router-opposite end, the destination address in tunnel is made as to the address of couple in router A, and data message is sent to couple in router A.Couple in router A receives after above-mentioned message, removes tunnel encapsulation, and data message is delivered to terminal.When terminal has been switched the current couple in router for its service because moving, take and be switched to couple in router B as example from couple in router A, couple in router A need to upgrade this terminal current " IP address-position " corresponding relation to location management server, is the IP address of couple in router A by updating location information.Couple in router-opposite end also can acquire corresponding notice, thereby couple in router-opposite end can directly send to couple in router B by above-mentioned data message, then by couple in router B, message is sent to terminal.

As described above, only have small part to apply the support that needs network mobility, and the application of most of mobile terminal does not need.And the also demand of distinguishing terminal not of the above-mentioned mobility management scheme based on identity position principle is always terminal mobility service is provided.Like this, even if terminal does not need mobility support, network is always also some contexts relevant to support mobility of terminal maintenance, such as maintenance terminal in location management server " IP address-position " corresponding relation, and opposite end is while sending IP message to terminal, couple in router-opposite end adopts the method for tunnel encapsulation to transmit IP message all the time, and this has all increased the expense of network.In fact method of the present invention also can be applied in this mobile management technology based on the separation of identity position, can reduce the expense of network.

Embodiment five

Figure 7 shows that the fifth embodiment of the present invention, be applied in the mobile management technology based on the separation of identity position, specifically comprise following steps:

Step 701: with step 201.

Step 702: while receiving above-mentioned message, couple in router judgement terminal request be support ambulant IP address during prefix, for one of terminal distribution support ambulant IP address prefix, to location management server, send " IP address-position " relation of this terminal simultaneously, by location management server, preserved.Wherein, the positional information of terminal is preferably the IP address of this couple in router.If judgement terminal request is not support ambulant IP Di Zhi prefix,, as described in step 202, couple in router is that one of terminal distribution is not supported ambulant IP Di Zhi prefix, and the more positional information of new terminal of management server of putting not in place.

What deserves to be explained is, in the mobile management technology based on the separation of identity position, preferably, support ambulant IP address the beginning part of prefix use special value, for example, with 10 beginnings, with do not support ambulant IP address prefix distinguish.

Step 703: couple in router to terminal return distribution IP address prefix, preferably, as described in step 203, also carry to this IP address the attribute specification of prefix.

By the method for above-described embodiment, terminal need to from Network Capture support ambulant IP address during prefix, to network request, obtain.It should be noted that, if terminal from Network Capture to not supporting ambulant IP Di Zhi prefix, while receiving transmitting IP packet based on this IP, opposite end sends IP message, the above-mentioned ambulant IP address of not supporting that its destination address is terminal to terminal.When this IP message arrives couple in router-opposite end, couple in router-opposite end can judge this IP address do not support mobility (as, with the addresses of non-10 beginnings), use common routing mode directly this IP message to be sent, and needn't beat tunnel.Otherwise terminal is based on supporting ambulant IP Di Zhi prefix to receive transmitting IP packet, the destination address of the IP message that opposite end sends to terminal is set to the ambulant IP of the above-mentioned support address of terminal.When this IP message arrives couple in router-opposite end, couple in router-opposite end can judge this IP address support mobility (as, address with 10 beginnings), use above-mentioned location-based routing mode directly this IP message to be sent, as (destination address of outer IP encapsulation is set to the position of terminal, and source address is set to the IP address of couple in router-opposite end to use tunnel style; The destination of internal layer IP encapsulation is set to the IP address of terminal, source address is set to the IP address of opposite end) transmission data, or (the IP address of terminal is replaced in the IP address of the positional information of use GC group connector to the mode of use replacement object IP address, when the couple in router of packet incoming terminal, then replace) transmission data.

Same, in the mobile management technology based on the separation of identity position, couple in router also needs to know whether terminal has the ability of distinguishing two kinds of (support mobility and do not support mobility) IP, described in its method and principle and embodiment bis-, in like manner, does not repeat them here.

Preferably, in step 701, terminal to couple in router send route collection (Router Solicitation is called for short RS) message with request distributing IP address prefix, now terminal is carried above-mentioned various indication in this message; Couple in router is used routing broadcast (Router Advertisement is called for short RA) to reply terminal, carry distribute to terminal IP address prefix, and carry to this IP address the attribute specification of prefix.

Embodiment six

Figure 8 shows that the sixth embodiment of the present invention, when the mobile management technology of application identity position separation, terminal, because of the mobile scene of having switched the current couple in router adhering to, as being switched to target couple in router from source couple in router, specifically comprises following steps:

Step 801: with step 301.

Step 802: with step 302.

Step 803-804: get the current use of terminal IP address during prefix, target couple in router judges whether it has mobility.When mobility is supported in judgement, target couple in router is the new positional information using the IP address of oneself as terminal preferably, upgrades " IP address-position " relation of this terminal in location management server.If judgement do not support ambulant IP address prefix, as described in step 303-304, by target couple in router or source couple in router notification terminal discharge this IP address prefix.

Target couple in router judges whether the IP Di Zhi prefix of terminal supports mobility method as described in embodiment bis-, and its method is identical with principle, does not repeat them here.

What deserves to be explained is, in the mobile management technology of method application of the present invention based on the separation of identity position, also can be as described in embodiment tri-and four, terminal is used DHCP agreement, and its principle and method are roughly the same.Its difference is only that couple in router determines terminal request be support ambulant IP address during prefix, for terminal distribution is supported ambulant IP address, and " IP address-position " corresponding relation of terminal is sent to location management server.When switching, when the IP Di Zhi prefix of the current use of target-access server judgement terminal when ambulant, is upgraded location management server for " the IP address-position " of this terminal preservation for supporting.All the other principles are all similar, do not repeat them here.

The above-mentioned mobile management technology based on the separation of identity position also can be applicable to existing 3G network, and its corresponding framework as shown in Figure 9.As Fig. 9, GGSN, corresponding to above-mentioned couple in router, forwards IP message mutual between terminal and opposite end by tunnel style between GGSN and couple in router-opposite end.It should be noted that, couple in router-opposite end can be also another GGSN.As described above, the mobile management technology of identity position separation is applied to existing 3G network, has too above-mentioned problem.

Embodiment seven

Figure 10 shows that the seventh embodiment of the present invention, in 3G network, when terminal needs use to support ambulant IP address during prefix, to network request distribute support ambulant IP address prefix, specifically comprise the following steps:

Step 1001: when terminal need to configure support ambulant IP address during prefix, SGSN to current connection sends activation PDP (Packet Data Protocol, packet data protocol) context request, wherein carry request configuration support ambulant IP address the indication of prefix.

Step 1002: after receiving this message, above-mentioned SGSN is that terminal is selected a GGSN, and sends and create PDP Context request message to this GGSN, wherein also carries above-mentioned indication.

Step 1003: while receiving above-mentioned establishment PDP Context request message, when GGSN find to carry in this message above-mentioned terminal request distribute support ambulant IP address during the indication of prefix, for one of terminal distribution support ambulant IP address prefix.

What deserves to be explained is, preferably, by IP address prefix be divided into two classes: support ambulant and do not support ambulant.Preferably, with IP address the beginning part of prefix distinguish this two class, for example, take 10 beginnings as support ambulant IP address prefix, ambulant for not supporting with 01 beginning.

When GGSN be terminal distribution support ambulant IP address during prefix, also will be for this terminal sends message to location management server, carry into the IP address of terminal distribution the positional information of prefix and terminal, by location management server, preserve this information.Preferably, the IP address that the positional information of terminal is this GGSN.

Step 1004:GGSN returns and creates PDP Context response message to SGSN, carry into the above-mentioned IP address of terminal distribution prefix.Preferably, this message also carry to this IP address the attribute information of prefix, with inform this IP address of SGSN prefix be support ambulant IP address prefix.

Step 1005: receive after above-mentioned message, SGSN need to by for the IP address of terminal distribution prefix be kept at this locality, particularly, be kept in the PDP Context information of this terminal.Preferably, SGSN is still recorded in this locality by the above-mentioned attribute information of this IP Di Zhi prefix, as, with the PDP TYPE parameter field in PDP Context, recording this IP Di Zhi prefix is support ambulant or do not support ambulant.

What deserves to be explained is, GGSN can with by IP address the attribute of prefix be kept at this locality, particularly, be also kept in PDP Context.As above-mentioned, SGSN and GGSN all preserve the PDP Context of terminal, if the IP Di Zhi prefix in PDP Context is that support is ambulant, claim this PDP Context for supporting ambulant PDP Context; Otherwise, be referred to as not support ambulant PDP Context.

Step 1006:SGSN returns and activates PDP Context response message to terminal, carry above-mentioned distribution IP address prefix, also carry above-mentioned attribute simultaneously, with inform this IP address of terminal prefix be support ambulant IP address prefix.

By the method for above-described embodiment, terminal need to obtain support ambulant IP address during prefix, just to 3G network acquisition request.In general, the demand of terminal based on application, as above-mentionedly having application while needing network that mobility support is provided, terminal is just supported ambulant IP Di Zhi prefix to network request.What deserves to be explained is, if the application in terminal is without requiring mobility support, terminal to network request distributing IP address preferably do not carry during prefix above-mentioned indication (or carry other indication in order to explanation request be do not support ambulant IP address prefix), GGSN for this terminal distribution do not support ambulant IP address prefix return to terminal.Now, GGSN is without mutual with location management server, and location management server need not be also this terminal maintenance " IP address-position " relation.

When opposite end sends IP message to terminal, if terminal based on be support ambulant IP address prefix, couple in router-opposite end first sends to above-mentioned IP message the GGSN of terminal according to the positional information of terminal by beating the mode in tunnel, removes tunnel encapsulation send to terminal afterwards again by GGSN; If terminal based on be do not support ambulant IP address prefix, directly send IP message couple in router-opposite end, common routing mechanism can send to terminal by this IP message.As mentioned above, couple in router-opposite end can according to the IP address of terminal the beginning part of prefix determine that it is ambulant or ambulant based on not supporting based on supporting.

Also what deserves to be explained is, as described in embodiment mono-, GGSN needs to determine whether terminal has the ability that can identify these two kinds of IP Di Zhi prefixes (support mobility, do not support mobility).If GGSN judgement terminal does not have the ability of these two kinds of IP of identification, when terminal request obtain IP address during prefix, be always terminal distribution support ambulant IP address prefix.GGSN can judge whether terminal has the ability that can identify these two kinds of IP in the following way:

A kind of method is, the terminal with aforementioned capabilities sending a request message to SGSN (as, PDP context activation request message), always in request message clear and definite carry indication oneself need which kind of IP address the indication of prefix, this indication further by SGSN send to GGSN (as, by creating context request message), GGSN can judge this terminal according to this indication and have aforementioned capabilities; Otherwise if do not carry above-mentioned indication in above-mentioned message, GGSN terminal does not have aforementioned capabilities.Another kind method is, in terminal first during acquisition request IP address, send to the request message of SGSN (as, PDP context activation request) in, carry another indication, with illustrate oneself can distinguish above-mentioned two kinds (, support mobility, do not support mobility) IP address prefix, then send to GGSN by SGSN.If do not carry this indication, GGSN judge this terminal can not distinguish above-mentioned two kinds of IP addresses prefix.Another method is, terminal in initial network entry process, by oneself can distinguish above-mentioned two kinds of IP addresses prefix informing capability in network, preserve the contextual information of this terminal network element (as, HLR, HSS, SGSN etc.) by this network element, preserve this information.Preferably, have aforementioned capabilities terminal carries indication explanation and oneself has this ability in sending to the message of said network element; Otherwise the terminal without aforementioned capabilities is not carried above-mentioned indication in sending to the message of said network element, while not carrying above-mentioned indication in the message that this NE Discovery is being received, judge terminal do not have distinguish above-mentioned two kinds of IP addresses the ability of prefix.Now, GGSN can from the network element of the contextual information of above-mentioned this terminal of preservation know this terminal whether have can identify these two kinds of IP addresses the ability of prefix.

Embodiment eight

Figure 11 shows that the eighth embodiment of the present invention, described terminal and switched the current SGSN adhering to because of mobile, and triggered the scene of switching the GGSN adhering to, is to be switched to target GGSN from source GGSN specifically, specifically comprises following steps:

Step 1101: terminal is consulted with the radio network controller (Radio Network Controller, RNC) of current service because of mobile, initiates the flow process of handed over service RNC.

Before step 1102: the RNC of current service (source RNC) switches to terminal, the SGSN (source SGSN) of connection sends redirect request, triggers and switches.

Step 1103: source SGSN is that terminal is selected another SGSN (target SGSN), and send and deliver redirect request, the PDP Context information of carried terminal to target SGSN.The IP address of the current use of this PDP Context information carried terminal prefix, and preferably also carry these IP addresses the attribute information (support mobility, or do not support mobility) of prefix.

Step 1104: after receiving above-mentioned message, the PDP Context information based on above-mentioned, target SGSN and Target RNC (that is, and selected for terminal, after switching, be the RNC of Terminal Service) alternately, for terminal is set up radio bearer resources.

Step 1105: target SGSN is returned and delivered redirected response message to source SGSN.

Step 1106: source SGSN sends redirect command to source RNC.

Step 1107: source RNC sends to be redirected to Target RNC and submits message to.

Step 1108: Target RNC sends to be redirected to target SGSN finds message.

Step 1109: Target RNC and terminal interaction mobility information.

Step 1110: Target RNC sends and has been redirected message to target SGSN.

Step 1111: target SGSN is that terminal is selected preferred GGSN, for example the topological nearest GGSN of chosen distance self is as the target GGSN of terminal.

Step 1112: hypothetical target SGSN is that the target GGSN that terminal is selected is not the GGSN (that is, source GGSN) connecting before terminal is switched, target SGSN judge terminal IP address prefix whether support mobility.Be judged as YES, perform step 1113-1116, otherwise execution step 1117-1118.

Step 1113: in the IP address of target SGSN judgement terminal prefix when supporting ambulant IP, for this IP address prefix to target GGSN, send to create PDP Context request message, carry to this IP address the relevant PDP Context information of prefix, wherein carry this IP address prefix.Preferably, also carry explanation its for support ambulant IP address the indication of prefix.

Step 1114: after receiving above-mentioned message, target GGSN judgement need IP address that the PDP Context that creates is corresponding prefix be support ambulant, therefore mutual with location management server, upgrade this terminal this IP address the positional information of prefix, new positional information is preferably the IP address of this target GGSN.Preferably, target GGSN according to the indication of carrying described in step 1113 determine this IP address prefix be support ambulant; Preferably, target GGSN also can judge whether above-mentioned IP Di Zhi prefix supports mobility according to local configuration information, for example, and as above-mentioned, if this IP Di Zhi prefix is with 10 beginnings, for supporting ambulant prefix.

Step 1115: target GGSN and source GGSN are mutual, from source GGSN obtain to above-mentioned IP address the relevant contextual information of prefix.

Step 1116: target GGSN returns and creates PDP Context response message to target SGSN.

Step 1117: in the IP address of target SGSN judgement terminal prefix when not supporting ambulant IP, by target SGSN initiation this IP address of deexcitation PDP Context corresponding to prefix.Target SGSN sends to source GGSN the PDP Context request of deleting, to remove the upper information relevant to above-mentioned IP of source GGSN that is kept at.

Step 1118: target SGSN sends the request of deexcitation PDP Context to terminal, notification terminal discharge this IP address prefix.Now, operate in this terminal all based on this IP address the business of prefix all will interrupt.Certainly, the request based on business, terminal can again initiate to network request obtain new IP address prefix.

Step 1119: follow-up related procedure.

From the present embodiment, in terminal switching process, target SGSN can according to the IP address in the PDP Context information of the terminal getting prefix whether support mobility, selectively process.For those, support ambulant IP and create PDP Context on target GGSN, now after switching completes, this IP address prefix can continue to be used by terminal; For not supporting its corresponding PDP Context of deexcitation of ambulant IP, impel terminal discharge this IP address prefix, after having switched, this IP address prefix can not continue be used.

What deserves to be explained is, in step 1113, target SGSN can first send and upgrade PDP Context request message to source GGSN, and preferably carries IP corresponding to this PDP Context of indication explanation and support mobility; Source GGSN sends context PUSH message to target GGSN again, carry above-mentioned IP address PDP Context information corresponding to prefix, and above-mentioned indication; Target GGSN receives after above-mentioned message, in judgement above-mentioned IP Di Zhi prefix, is to support ambulant time, as described in step 1114, mutual with location management server, more the positional information of new terminal.

Embodiment nine

Figure 12 shows that the ninth embodiment of the present invention, described terminal and switched the current SGSN adhering to because of mobile, and triggered the scene of switching the GGSN adhering to, is to be switched to target GGSN from source GGSN specifically, specifically comprises following steps:

Step 1201: with step 1101.

Step 1202-1210: with step 1102-1110.

Step 1211: target SGSN is that terminal is selected preferred GGSN, for example the topological nearest GGSN of chosen distance self is as the target GGSN of terminal.

Step 1212: target SGSN send to create PDP Context request message to target GGSN, carries the PDP Context information of (SGSN gets from source) terminal that target SGSN preserves, wherein contain IP address that terminal used prefix.

Step 1213: after receiving establishment PDP Context request message, target GGSN sends request to source GGSN, to obtain other contextual informations relevant to the PDP Context that will create.

Step 1214: source GGSN returns to response message to target GGSN, carries the information of target GGSN request, carries indication simultaneously, with illustrate IP address that this PDP Context is corresponding prefix support or do not support mobility.

Step 1215: target GGSN returns to establishment context acknowledge message to target SGSN.

Step 1216: target GGSN according to the above-mentioned indication of returning in step 1214 can judge terminal IP address prefix whether support mobility (that is, whether the PDP Context of terminal supports mobility).If support, perform step 1217; Otherwise, carry out 1218-1220.

Step 1217: when supporting ambulant IP, as described in step 1114, mutual with location management server in target GGSN judgement above-mentioned IP Di Zhi prefix, the positional information of new terminal more.

Step 1218: in target GGSN judgement above-mentioned IP address prefix when not supporting ambulant IP, by target GGSN initiation this IP address of deexcitation PDP Context corresponding to prefix.Particularly, target GGSN sends to target SGSN the PDP Context request of deleting, and triggers the deexcitation to above-mentioned PDP Context.

Step 1219: with step 1118.

Step 1220: target SGSN is returned to deletion PDP Context to target GGSN and replied.

Step 1221: follow-up flow process.

Worth explanation is that, as above-mentioned, in step 1214, target GGSN can know whether the IP Di Zhi prefix of terminal supports mobility from source GGSN.Now, if do not support, can be in step 1215 to target SGSN, return to the response that creates PDP Context failure, the target SGSN of simultaneously setting out initiate its activate this IP address the flow process of PDP Context corresponding to prefix, as described in step 1117-1118.

Embodiment ten

Figure 13 shows that the fourth embodiment of the present invention, described terminal and switched the current SGSN adhering to because of mobile, and triggered the scene of switching the GGSN adhering to, is to be switched to target GGSN from source GGSN specifically, specifically comprises following steps:

Step 1301: with step 1101.

Step 1302-1310: with step 1102-1110.

Step 1311: target SGSN, according to the PDP Context getting, can be known the GGSN (source GGSN) connecting before terminal, and sends to source GGSN the PDP Context request of upgrading.

Step 1312: GGSN judgement in source oneself is not suitable for continuing as Terminal Service, for terminal is selected a new GGSN, and sends message to push the contextual information of this terminal to this target GGSN, comprises the PDP Context information of terminal.Wherein, the IP address that comprises the current use of terminal prefix, and preferably also comprise this IP address the attribute (supporting or do not support mobility) of prefix.

Step 1313: target GGSN returns to response message to source GGSN.

Step 1314: source GGSN returns and upgrades PDP Context response message to target SGSN.

Step 1315: target GGSN according to the above-mentioned indication (attribute) of obtaining in step 1312 can judge terminal IP address prefix whether support mobility, whether the PDP Context of terminal supports mobility in other words.If support, perform step 1316; Otherwise, carry out 1317-1319.

Step 1316: when supporting ambulant IP, as described in step 1114, mutual with location management server in target GGSN judgement above-mentioned IP Di Zhi prefix, the positional information of new terminal more.

Step 1317-1319: in target GGSN judgement above-mentioned IP Di Zhi prefix when not supporting ambulant IP, with step 1218-1220.

Step 1320: follow-up flow process.

What deserves to be explained is, in step 1312, source GGSN before the PDP Context that pushes terminal to target GGSN, first judge its corresponding IP address prefix whether there is mobility, if having, carry out above-mentioned step 1312 and follow-up step; Otherwise just this PDP Context is not sent to target GGSN, initiated the flow process of this PDP Context of deexcitation simultaneously by source GGSN, its concrete implementation and step 1317-1319 are similar, and only the initiator of flow process is source GGSN.

Embodiment 11

Figure 14 shows that the fifth embodiment of the present invention, described terminal and switched the current SGSN adhering to because of mobile, and triggered the scene of switching the GGSN adhering to, is to be switched to target-GGSN from source-GGSN specifically, specifically comprises following steps:

Step 1401: with step 1101.

Step 1402: with step 1102.

Step 1403: with step 1103, source SGSN is terminal select target SGSN, and send and deliver redirect request, the PDP Context information of carried terminal to target SGSN.The IP address of the current use of this PDP Context information carried terminal prefix, and preferably also carry these IP addresses the type (support mobility, or do not support mobility) of prefix.

Step 1404: target SGSN is that terminal is selected preferred GGSN, for example the topological nearest GGSN of chosen distance self is as the target GGSN of terminal.

Step 1405: IP address corresponding to the above-mentioned PDP Context of receiving of target SGSN judgement the attribute of prefix, be support ambulant or do not support ambulant.If be judged as support mobility, target SGSN and Target RNC are mutual, for this PDP Context of terminal is set up radio bearer resources.Also can whether support mobility according to local configuration determination.

Step 1406: target SGSN is returned and delivered redirected response message to source SGSN, confirm to support ambulant PDP Context (that is, its corresponding IP address prefix support mobility); Meanwhile, ambulant PDP Context is not supported in indication source SGSN deexcitation.

Step 1407: source SGSN sends redirect command to source RNC.As above-mentioned, source SGSN initiates not support ambulant PDP context deactivation, the similar step 1117-1118 of idiographic flow, and only the initiator of flow process is changed to source SGSN.

Step 1408-1411: with step 1107-1110.

Step 1412: the target GGSN selecting according to target SGSN in above-mentioned steps, for terminal creates PDP Context at target GGSN.Worth explanation is that PDP Context is now supports ambulant PDP Context.Idiographic flow is with embodiment eight, nine, ten, and principle is identical, at this, is not repeating.

Also what deserves to be explained is, before execution step 1403, source SGSN can judge that the PDP Context support of terminal do not support mobility, the IP address that this PDP Context is corresponding prefix for supporting ambulant or not supporting ambulant.Now, source SGSN to target SGSN, send deliver redirect request in only carry those and support ambulant PDP Context; And those do not support ambulant PDP Context to initiate deexcitation.In follow-up flow process, the PDP Context one of this terminal that target SGSN gets is decided to be supports ambulant PDP Context like this.Follow-up operation, with above-mentioned, does not have essential distinction.

The above-mentioned mobile management technology based on the separation of identity position also can be applicable to existing LTE network, and its corresponding framework as shown in figure 15.As Figure 15, P-GW, corresponding to above-mentioned couple in router, forwards IP message mutual between terminal and opposite end by tunnel style between P-GW and couple in router-opposite end.It should be noted that, couple in router-opposite end can be also another P-GW.As described above, the mobile management technology of identity position separation is applied to existing LTE network, has too above-mentioned problem.

Embodiment 12

Figure 16 shows that the 12nd embodiment of the present invention, in LTE network, when terminal needs use to support ambulant IP address during prefix, to network request distribute support ambulant IP address prefix, specifically comprise the following steps:

Step 1601: when terminal initial networks, (being eNodeB) sends and to adhere to request to base station, if terminal think request support ambulant IP address prefix, in adhering to request, carry request configuration support ambulant IP address the indication of prefix.

Step 1602:eNodeB asks to send to Mobility Management Entity (Mobility Management Entity is called for short MME) by above-mentioned adhering to, and wherein also carries above-mentioned indication.

Step 1603:MME further sends and creates session request to S-GW, wherein also carries above-mentioned indication.

Step 1604:S-GW is that terminal is selected a P-GW, then to this P-GW, sends and creates conversation request message, wherein carries above-mentioned indication.

Step 1605: receive after above-mentioned establishment conversation request message, when P-GW find to carry in this message above-mentioned terminal request distribute support ambulant IP address during prefix, for one of terminal distribution support ambulant IP address prefix.

What deserves to be explained is, as described in step 1003, preferably by IP address prefix be divided into two classes: support ambulant and do not support ambulant.Also preferably with IP address the beginning part of prefix distinguish this two class.Same method as described in step 1003, when P-GW be terminal distribution support ambulant IP address during prefix, also to location management server, send message for this terminal, carry for the IP address of terminal distribution the positional information of prefix and terminal, by location management server, preserve this information.Preferably, the IP address that the positional information of terminal is this P-GW.

Step 1606:P-GW returns to establishment session response message to S-GW, carry into the above-mentioned IP address of terminal distribution prefix.Preferably, this message also carry this IP address the attribute information of prefix, with inform this IP address of S-GW prefix be support ambulant IP address prefix.

Step 1607:S-GW further returns to establishment session response message to MME, carry equally above-mentioned IP address prefix, and above-mentioned attribute information.

Step 1608:MME need to preserve the above-mentioned IP address for terminal distribution prefix, such as, be kept in the PDN context of terminal.Preferably, MME is also also kept at the attribute information of IP Di Zhi prefix in PDN context, for example, by PDN TYPE field, preserves.

Step 1609-1610:MME returns to adhere to eNodeB and accepts message, wherein carry above-mentioned IP address prefix, and attribute information; ENodeB further returns to adhere to terminal and accepts message, wherein carry above-mentioned IP address prefix, and attribute information.

What deserves to be explained is, P-GW can by IP address the attribute information of prefix be kept at this locality, particularly, be also kept in PDN context.As above-mentioned, MME and P-GW all preserve the PDN context of terminal, if the IP Di Zhi prefix in PDN context is that support is ambulant, claim this PDN context for supporting ambulant PDN context; Otherwise, be referred to as not support ambulant PDN upper and lower day.

By the method for above-described embodiment, terminal when initial network entry, need to obtain support ambulant IP address prefix in the situation that, to LTE network request support ambulant IP address prefix.

What deserves to be explained is, after initial network entry, terminal again to LTE network request distributing IP address during prefix (support ambulant or do not support ambulant), can to MME, send PDN connection request (PDN Connectivity Request) by eNodeB, and carry above-mentioned indication.With the above-mentioned method of the present embodiment, MME sends message to S-GW, and S-GW to P-GW send message be terminal request distributing IP address prefix.Use the same method, P-GW be terminal distribution support ambulant or do not support ambulant IP address prefix, and send to MME, now MME use PDN to connect to accept (PDN Connectivity Accept) message by the IP Di Zhi prefix of above-mentioned distribution with and attribute send to terminal.

Also what deserves to be explained is, as described in embodiment mono-, P-GW needs to determine whether terminal has the ability that can identify these two kinds of IP Di Zhi prefixes (support mobility, do not support mobility).If P-GW judgement terminal does not have the ability of these two kinds of IP of identification, when terminal request obtain IP address during prefix, be always terminal distribution support ambulant IP address prefix.GGSN can judge whether terminal has the ability that can identify these two kinds of IP in the following way:

A kind of method is, the terminal with aforementioned capabilities sending a request message to MME (as, Attach Request message, PDN connection request message), always in request message clear and definite carry indication oneself need which kind of IP address the indication of prefix, this indication further by MME by S-GW send to P-GW (as, by creating conversation request message), P-GW can judge this terminal according to this indication and have aforementioned capabilities; Otherwise if do not carry above-mentioned indication in above-mentioned message, P-GW terminal does not have aforementioned capabilities.Another kind method is, in terminal first during acquisition request IP address, send to the request message of MME (as, Attach Request message) in, carry another indication, with illustrate oneself can distinguish above-mentioned two kinds (, support mobility, do not support mobility) IP address prefix, then by S-GW, send to P-GW by MME.If do not carry this indication, P-GW judge this terminal can not distinguish above-mentioned two kinds of IP addresses prefix.Another method is, terminal in initial network entry process, by oneself can distinguish above-mentioned two kinds of IP addresses prefix informing capability in network, preserve the contextual information of this terminal network element (as, HLR, HSS, MME etc.) by this network element, preserve this information.Preferably, have aforementioned capabilities terminal carries indication explanation and oneself has this ability in sending to the message of said network element; Otherwise the terminal without aforementioned capabilities is not carried above-mentioned indication in sending to the message of said network element, while not carrying above-mentioned indication in the message that this NE Discovery is being received, judge terminal do not have distinguish above-mentioned two kinds of IP addresses the ability of prefix.Now, when P-GW can from the network element of the contextual information of above-mentioned this terminal of preservation know this terminal whether have can identify these two kinds of IP addresses the ability of prefix.

Embodiment 13

Figure 17 shows that the 13rd embodiment of the present invention, described terminal and switched the current S-GW adhering to because of mobile, and triggered the scene of switching the P-GW adhering to, is to be switched to target-P-GW from source-P-GW specifically, specifically comprises following steps:

Step 1701: eNodeB (target eNode B) consult to decide that the current eNodeB adhering to of terminal (source eNodeB) and terminal will be switched to is initiated to switch to terminal.

Step 1702: source eNodeB sends handover request to MME.

Step 1703:MME judge the current use of terminal IP address prefix whether support mobility, judge whether the PDN context of terminal supports mobility.If do not supported to perform step 1704, no person performs step 1705-1714.

Step 1704: when the PDN context of MME judgement terminal is not supported mobility, initiate to delete this PDN context (PDN disconnection) by MME.Particularly, MME initiates to delete conversation request message by the S-GW (source S-GW) to the current connection of terminal, to trigger, deletes the above-mentioned ambulant PDN context (that is, deleting this PDN connects) of not supporting.

Step 1705-1706: when mobility supported in the PDN context of MME judgement terminal, the S-GW that will be switched to terminal (target S-GW) sends the session request that creates, the PDN contextual information of carried terminal wherein, comprising the IP address of terminal prefix, and preferably carry this IP address the attribute of prefix.Target S-GW returns to establishment session response message to MME.

Between step 1707:MME and target eNode B mutual handover request acknowledge message.

Step 1708-1709:MME sends switching command to target eNode B; ENodeB sends switching command to terminal.

Step 1710: terminal sends switch acknowledgment message to target eNode B.

Step 1711: target eNode B sends to switch to MME and notices.

Step 1712:MME send to revise bearing request message to target S-GW, wherein preferably carry above-mentioned terminal IP address the attribute of prefix.

Step 1713: target S-GW is that terminal selects P-GW as target P-GW, and sends and create session request to target P-GW, carries above-mentioned PDN context, preferably also indicates this PDN for supporting ambulant PDN context.Target P-GW, to source P-GW (that is, the P-GW that terminal was adhered to before switching) other contexts that request is relevant to this terminal, returns to establishment session response message to target S-GW simultaneously.And because this PDN is that support is ambulant, target P-GW is the positional information that terminal distribution is new, and it is updated to location management server.

Step 1714: target S-GW returns and revises carrying response message to MME.

Step 1715: follow-up flow process.

From the present embodiment, in terminal switching process, MME can according to the IP address in the PDN contextual information of terminal prefix whether support mobility, selectively process.For those, support ambulant IP to trigger and on target P-GW, create PDN context, now after switching completes, this IP address prefix can continue to be used by terminal; For not supporting ambulant IP to delete corresponding PDN context, impel terminal discharge this IP address prefix, after having switched, this IP address prefix can not continue be used.

Embodiment 14

Figure 18 shows that the 14th embodiment of the present invention, described terminal and switched the current S-GW adhering to because of mobile, and triggered the scene of switching the P-GW adhering to, is to be switched to target-P-GW from source-P-GW specifically, specifically comprises following steps:

Step 1801-1802: with step 1701-1702.

Step 1803:MME send to create conversation request message to target S-GW, the PDN context of carried terminal, wherein the IP address of the current use of carried terminal prefix.Preferably, wherein also carry this IP address the attribute (support ambulant or do not support ambulant) of prefix.

Step 1804: target S-GW is that terminal selects a P-GW as target P-GW, during the source P-GW that used before target P-GW is not terminal, target S-GW check terminal IP address prefix whether support mobility.Target S-GW returns to establishment session response message to MME.Wherein, indication MME discharge those do not support ambulant IP address PDN context corresponding to prefix.

Step 1805: the indication in the message of returning according to target S-GW, MME initiates to delete corresponding PDN context, the method as described in step 1704.

Step 1806-1810: for support mobility IP address prefix, target S-GW does not indicate MME to remove to discharge corresponding PDN context.MME processes according to the method described in step 1707-1711.

Step 1811:MME send to revise carrying request to target S-GW, the preferred IP Di Zhi prefix of carried terminal wherein, with and attribute.

What deserves to be explained is, in step 1803, target S-GW can be not to the IP address of terminal prefix whether support that mobility processes, in step 1804 not to MME return above-mentioned indication with indication MME go to discharge do not support ambulant IP address PDN context corresponding to prefix., now, in this step, can do above-mentioned processing.That is, if the IP address of terminal prefix do not support mobility, target S-GW can should carry above-mentioned indication in message in the modification carrying of returning to MME, then according to indication, initiates to discharge corresponding PDN context by MME.

Step 1812: flow process as described in above-mentioned 1713.

Step 1813: target S-GW returns and revises carrying response message to MME.

Step 1814: follow-up flow process.

Embodiment 15

Figure 19 shows that the 15th embodiment of the present invention, described terminal and switched the current S-GW adhering to because of mobile, and triggered the scene of switching the P-GW adhering to, is to be switched to target-P-GW from source-P-GW specifically, specifically comprises following steps:

Step 1901-1902: with step 1701-1702.

Step 1903-1904:MME send to create conversation request message to target S-GW, the PDN context of carried terminal, wherein the IP address of the current use of carried terminal prefix.Preferably, wherein also carry this IP address the attribute of prefix.Target S-GW returns to establishment session response message to MME.

Step 1905-1909: with step 1707-1711.

Step 1910:MME send to revise carrying request to target S-GW, the preferred IP Di Zhi prefix of carried terminal wherein, with and attribute.

Step 1911: target S-GW is that (terminal selects a new P-GW, target P-GW), and send and create bearing request message to target P-GW, wherein carry above-mentioned PDN context, wherein contain above-mentioned terminal IP address prefix, and preferably also carry its attribute.

Step 1912: target P-GW and source P-GW obtain the contextual information (the PDN contextual information of preserving as, P-GW) of terminal alternately.Now, source P-GW can inform whether the IP Di Zhi prefix of target P-GW terminal supports mobility, and, in step 1911, target S-GW also can not notify the attribute of the IP Di Zhi prefix of target P-GW terminal.

Step 1913-1914: target P-GW returns and creates carrying response message to target S-GW; Target S-GW returns and revises carrying response message to MME.

Step 1915: target P-GW judge terminal IP address prefix whether support mobility.As above-mentioned, target P-GW can judge according to the indication getting from target S-GW or this source P-GW; Or target P-GW can judge according to local configuration information, for example, take 10 initial IP addresses prefix ambulant as supporting, otherwise ambulant for not supporting.When being judged as YES, performing step 1916, otherwise perform step 1917.

Step 1916: when the IP Di Zhi prefix of target P-GW judgement terminal is supported mobility, for this terminal arrives the more positional information of new terminal of location management server.Its positional information is preferably the IP address of this target P-GW.

Step 1917: in the IP address of target P-GW judgement terminal prefix while not supporting mobility, target P-GW initiate to discharge this IP address PDN context corresponding to prefix.Particularly, target P-GW triggers PDN context corresponding to deletion (in other words, deleting corresponding PDN connects) by send deleting bearing request message to target S-GW.

Step 1918: follow-up flow process.

What deserves to be explained is, target P-GW in the IP address of judgement terminal prefix while not supporting mobility, also can notification source P-GW trigger and delete corresponding PND and connect.For example, in step 1912, target P-GW is returning in the response message of obtaining contextual information to source P-GW, carries corresponding indication, to allow source P-GW initiate to delete the step that PND connects.Or, target P-GW when the contextual information to P-GW requesting terminal, source, source P-GW directly judge terminal IP address prefix whether support mobility, when being judged as while not supporting, by source P-GW, directly initiate to delete the contextual flow process of corresponding PDN.

Also what deserves to be explained is, when the modification bearing request message described in receiving step 1910, also can carry out in the following manner the operation that terminal is switched P-GW:

Step 1911a: target S-GW sends and revises bearing request message to source P-GW.

Step 1912a: when source P-GW receives above-mentioned message, for terminal is selected new P-GW, i.e. a target P-GW.Now, source P-GW judges whether the IP Di Zhi prefix of terminal supports mobility, ambulant to not supporting, as above-mentioned, by source P-GW, directly initiates to delete the contextual flow process of corresponding PDN, terminal is discharged and do not support ambulant IP Di Zhi prefix; For support ambulant IP address prefix, source P-GW sends to target P-GW by corresponding PDN contextual information, is terminal establishment PDN contextual information on target P-GW.

Step 1913a: source P-GW returns and revises carrying response message to target S-GW.

Step 1914a: target S-GW returns and revises carrying response message to MME.

Step 1915a: follow-up flow process.

In the various embodiments described above, terminal can have a plurality of PDP Contexts or PDN context, when judging whether to support mobility, each PDP Context or PDN context is judged separately.

One of ordinary skill in the art will appreciate that all or part of step in said method can come instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

Claims

1. acquisition request is supported a method of mobility IP, it is characterized in that, comprising:

2. the method for claim 1, it is characterized in that, described method also comprises: when described couple in router returns to described support ambulant IP address or prefix to described terminal, also carry attribute information, inform described in described terminal that IP address or prefix are to support ambulant IP address or prefix.

3. the method for claim 1, it is characterized in that, described method also comprises, described couple in router receives after described request message, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is not support ambulant IP address or prefix, described couple in router be described terminal distribution do not support ambulant IP address or prefix and to described terminal, return described in do not support ambulant IP address or prefix.

4. the method for claim 1, it is characterized in that, described method also comprises: if described terminal does not possess the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, described couple in router receives after described request message, obtains and supports ambulant IP address or prefix and return to described support ambulant IP address or prefix to described terminal.

5. the method for claim 1, is characterized in that, described couple in router judges in the following way one or a combination set of whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing:

6. the method for claim 1, it is characterized in that, described method also comprises: described terminal is from described couple in router is switched to target couple in router, described target couple in router obtains IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, the anchor point network element of described target couple in router and this terminal carries out alternately, upgrading the mobility context of this terminal; Otherwise, described target couple in router initiate to notify this terminal discharge this IP address prefix; Or described target couple in router is notified described couple in router, by described couple in router, initiated to notify this terminal to discharge this IP address or prefix.

7. method as claimed in claim 6, is characterized in that, described target couple in router judges according to following mode whether the IP address of the current use of described terminal or prefix support mobility:

8. the method for claim 1, is characterized in that, described couple in router obtains described support ambulant IP address or prefix in the following way:

9. the method as described in as arbitrary in claim 1 to 5, is characterized in that, described couple in router obtains described IP address or prefix in the following way:

Described method also comprises:

10. method as claimed in claim 9, is characterized in that, described method also comprises:

11. methods as claimed in claim 9, it is characterized in that, described method also comprises: in described terminal from described couple in router is switched to target couple in router, described target couple in router obtains IP address or the prefix of the current use of described terminal, whether the IP address or the prefix that judge the current use of described terminal support mobility, if supported, described target couple in router upgrades the positional information of described terminal to described location management server; Otherwise described target couple in router initiates to notify this terminal to discharge IP address or the prefix of the current use of described terminal; Or described target couple in router notifies described couple in router to be initiated IP address or the prefix of notifying this terminal to discharge current use by described couple in router.

12. methods as described in as arbitrary in claim 1 to 5, is characterized in that, described couple in router is gateway general packet wireless service support node GGSN;

Described method also comprises:

13. methods as claimed in claim 12, is characterized in that,

Described method also comprises, when described GGSN sends to described SGSN by described support ambulant IP address or prefix, also carries attribute information, informs described in described SGSN that IP address or prefix are for supporting ambulant IP address or prefix;

14. methods as claimed in claim 12, is characterized in that, described method also comprises:

15. methods as claimed in claim 12, is characterized in that,

Described terminal is switched to target SGSN from described SGSN, and described target SGSN or described GGSN be described terminal select the non-described GGSN of target GGSN time, described target GGSN judges whether the IP address of described terminal or prefix support mobility:

16. methods as claimed in claim 15, is characterized in that, whether IP address or prefix that described target GGSN obtains the current use of described terminal according to following mode support mobility:

17. methods as claimed in claim 12, it is characterized in that, described terminal is switched to the process of target SGSN from described SGSN, described target SGSN receives after the redirect request of described SGSN transmission, judges whether the IP address of the described terminal of carrying in described redirect request or prefix support mobility:

18. methods as claimed in claim 12, it is characterized in that, described terminal is switched to the process of target SGSN from described SGSN, described SGSN sends before redirect request to described target SGSN, whether the IP address or the prefix that judge described terminal support mobility, to support ambulant IP address or PDP Context corresponding to prefix to send to described target SGSN by described redirect request, to not supporting ambulant IP address or prefix, described SGSN initiates deexcitation and does not support ambulant IP address or PDP Context corresponding to prefix.

19. methods as described in as arbitrary in claim 1 to 5, is characterized in that,

Described couple in router is grouped data network gateway P-GW;

Described method also comprises:

20. methods as claimed in claim 19, is characterized in that, when described terminal is initiated to switch, the MME of described terminal judges whether the IP address of described terminal or prefix support mobility:

21. methods as claimed in claim 19, it is characterized in that, described terminal is initiated to switch, from described S-GW is switched to target S-GW, when described target S-GW or described P-GW are the non-described P-GW of target P-GW of described terminal selection, described target S-GW or described P-GW judge whether the IP address of described terminal or prefix support mobility:

22. methods as claimed in claim 19, is characterized in that, described terminal is switched to the process of target P-GW from described P-GW, and described target P-GW judges whether the IP address of described terminal or prefix support mobility:

23. 1 kinds of network sides, it is characterized in that, comprise: couple in router, described couple in router is used for: after receiving the described couple in router of request of self terminal to be the request message of described terminal distribution IP address or prefix, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is to support ambulant IP address or prefix, obtain and support ambulant IP address or prefix, and return to described support ambulant IP address or prefix to described terminal.

24. network sides as claimed in claim 23, it is characterized in that, described couple in router also for: while returning to described support ambulant IP address or prefix to described terminal, carry attribute information, inform described in described terminal that IP address or prefix are to support ambulant IP address or prefix.

25. network sides as claimed in claim 23, it is characterized in that, described couple in router also for, receive after described request message, if described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing, and what described request message was asked is not support ambulant IP address or prefix, for described terminal distribution do not support ambulant IP address or prefix and to described terminal, return described in do not support ambulant IP address or prefix.

26. network sides as claimed in claim 23, it is characterized in that, described couple in router also for, described couple in router receives after described request message, if described terminal does not possess, do not distinguish the ability of supporting mobility and not supporting ambulant IP address or prefix, obtain and support ambulant IP address or prefix and return to described support ambulant IP address or prefix to described terminal.

27. network sides as claimed in claim 23, is characterized in that, described couple in router is for judging in the following way one or a combination set of whether described terminal possesses the ability of supporting mobility and not supporting ambulant IP address or prefix of distinguishing:

28. network sides as claimed in claim 23, is characterized in that, described network side also comprises target couple in router, wherein:

29. network sides as claimed in claim 28, is characterized in that, described target couple in router is for judging according to following mode whether the IP address of the current use of described terminal or prefix support mobility:

30. network sides as claimed in claim 23, is characterized in that, described couple in router obtains described support ambulant IP address or prefix in the following way:

31. network sides as described in as arbitrary in claim 23 to 27, is characterized in that, described couple in router obtains described IP address or prefix in the following way:

32. network sides as claimed in claim 31, is characterized in that,

Described couple in router also for: while receiving that described terminal sends to the data message of opposite end, if ambulant IP address or prefix are not supported in the current use in described opposite end, described couple in router directly sends described data message; If ambulant IP address or prefix are supported in the current use in described opposite end, described couple in router adopts based on the method for routing of end position is sent to described data message.

33. network sides as claimed in claim 31, is characterized in that, described network side also comprises target couple in router, wherein:

34. network sides as described in as arbitrary in claim 23 to 27, is characterized in that, described couple in router is gateway general packet wireless service support node GGSN:

35. network sides as claimed in claim 34, is characterized in that, described network side also comprises described SGSN, wherein:

36. network sides as claimed in claim 34, it is characterized in that, described GGSN also for, when described terminal switches, from described SGSN, be switched to target SGSN, when described GGSN is the non-described GGSN of target GGSN of described terminal selection, described GGSN judges whether the IP address of described terminal or prefix support mobility:

37. network sides as claimed in claim 34, is characterized in that, described network side also comprises target SGSN, wherein:

38. network sides as claimed in claim 34, is characterized in that, described network side also comprises target GGSN, wherein:

39. network sides as claimed in claim 38, is characterized in that, whether IP address or prefix that described target GGSN obtains the current use of described terminal according to following mode support mobility:

40. network sides as claimed in claim 34, is characterized in that, described network side also comprises target SGSN, wherein:

41. network sides as claimed in claim 34, it is characterized in that, described network side also comprises SGSN, described SGSN is used for, in described terminal, from described SGSN, be switched to the process of target SGSN, described SGSN sends before redirect request to described target SGSN, whether the IP address or the prefix that judge described terminal support mobility, to support ambulant IP address or PDP Context corresponding to prefix to send to described target SGSN by described redirect request, to not supporting ambulant IP address or prefix, described SGSN initiates deexcitation and does not support ambulant IP address or PDP Context corresponding to prefix.

42. network sides as described in as arbitrary in claim 23 to 27, is characterized in that,

Described couple in router is grouped data network gateway P-GW;

43. network sides as claimed in claim 42, is characterized in that, described network side also comprises MME, and described MME is used for, and when described terminal is initiated to switch, judge whether the IP address of described terminal or prefix support mobility:

44. network sides as claimed in claim 42, it is characterized in that, described P-GW also for, in described terminal, initiate to switch, when described P-GW is the non-described P-GW of target P-GW of described terminal selection, judge whether the IP address of described terminal or prefix support mobility:

45. network sides as claimed in claim 42, is characterized in that, described network side also comprises target S-GW, wherein:

46. network sides as claimed in claim 42, it is characterized in that, described network side also comprises target P-GW, and described target P-GW is used for: described terminal is switched to the process of target P-GW from described P-GW, judges whether the IP address of described terminal or prefix support mobility:

47. 1 kinds of acquisition request are supported the method for mobility IP, it is characterized in that, comprising:

48. 1 kinds of terminals, is characterized in that, described terminal is used for: to couple in router, send a request message, asking described couple in router is that described terminal distribution is supported ambulant IP address or prefix.