CN103428736B

CN103428736B - Method for switching network, network switched system and terminal

Info

Publication number: CN103428736B
Application number: CN201310377404.8A
Authority: CN
Inventors: 张晨璐; 董贤东; 其他发明人请求不公开姓名
Original assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd; Dongguan Yulong Telecommunication Technology Co Ltd
Current assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd; Dongguan Yulong Telecommunication Technology Co Ltd
Priority date: 2013-08-26
Filing date: 2013-08-26
Publication date: 2015-12-23
Anticipated expiration: 2033-08-26
Also published as: CN103428736A

Abstract

The invention provides a kind of method for switching network, comprise: when being in the terminal in mobile radio networks and needing business to switch to WLAN (wireless local area network), the mark being used for the APN (APN) and/or IP address and described terminal of setting up service bearer for described business is informed described WLAN (wireless local area network) by described mobile radio networks, prepares to be performed corresponding resource by described WLAN (wireless local area network).The invention allows for corresponding network switched system and terminal.By technical scheme of the present invention, mobile radio networks can be made to help terminal realization to the access operation of WLAN (wireless local area network), optimize the interoperability between mobile radio networks and WLAN (wireless local area network).

Description

Method for switching network, network switched system and terminal

Technical field

The present invention relates to mobile communication technology field, in particular to a kind of method for switching network, a kind of network switched system and a kind of terminal.

Background technology

Along with the fast development of mobile Internet, popularizing of intelligent terminal, and the rise of the new industry such as Internet of Things, cloud computing, mass data transfers becomes the most significant Characteristics of Development in Current wireless communication field.In the face of mass data is attacked, operator's existing network (2G/3G/LTE) cannot meet current demand.

For tackling this challenge, operation commercial city both domestic and external starts construction and the layout of large-scale WIFI hot spot.Along with WLAN(WirelessLocalAreaNetworks) extensive networking and the introducing of LTE technology, be badly in need of 3GPP(The3 ^rdgenerationPartnershipProject) the interoperability means of network and wlan network, to ensure that the early investment of operator can play shunting action in the LTE stage smoothly, and form more reasonably control device, increase the profitability of operator.

So-called " interoperability ", namely for the terminal be under 3GPP network, wishes under the assistance of 3GPP network, helps terminal switch to wlan network, thus optimizes handoff procedure, makes to shorten switching time, improves handover success rate.And in Current wireless communication system, the interoperability scheme of WLAN and UTRAN/GERAN is also in the interactive stage of low level.That is, UTRAN/GERAN and WLAN two separate operations of system, the security mechanism of two systems is also separated completely, and WLAN user, can not access mobile core net by just directly accessing Internet business after WLAN Access Network.Only have simple bill information to associate between WLAN with mobile network, that is, the intercommunication of this stage WLAN and mobile network be only embodied in realize user by BOSS system bill in comprise the expense of mobile network and WLAN simultaneously.

Along with the introducing of LTE, this intercommunication pattern can not meet the demand of operator far away, be badly in need of a kind of new Interworking Scheme and support that user terminal switches roam operation freely, with the raising of the more good utilisation and Consumer's Experience that realize operator's resource between WLAN and LTE.

In existing 3GPP standard, in core net aspect, define part frame and the content of 3GPP network and wlan network interoperability, but still very not comprehensive, also really cannot realize the switching intercommunication from 3GPP network to wlan network.

Summary of the invention

The present invention just based in the problems referred to above one of at least, propose a kind of new network handoff technique, mobile radio networks can be made to help terminal realization to the access operation of WLAN (wireless local area network), optimize the interoperability between mobile radio networks and WLAN (wireless local area network).

In view of this, the present invention proposes a kind of method for switching network, comprise: when being in the terminal in mobile radio networks and needing business to switch to WLAN (wireless local area network), the mark being used for the APN (APN) and/or IP address and described terminal of setting up service bearer for described business is informed described WLAN (wireless local area network) by described mobile radio networks, prepares to be performed corresponding resource by described WLAN (wireless local area network).

In this technical scheme, mobile radio networks is that the handover operation that terminal is about to perform carries out resource preparation by signaling WLAN (wireless local area network), thus contributes to improving handover success rate, shortening switching time.Be in because terminal is current in mobile radio networks, thus mobile radio networks can learn that terminal is the need of execution Network handover operations easily, such as terminal, when needs perform Network handover operations, can send relevant message to mobile radio networks.Wherein, wireless mobile communications (WirelessMobileCommunication) network and 3GPP network, such as GSM, CDMA etc.

In technique scheme, preferably, described WLAN (wireless local area network) perform corresponding resource prepare step comprise: for described business set up IP carrying and/or reserve interface-free resources.

In this technical scheme, WLAN (wireless local area network) is after the instruction receiving the resource preparation that mobile radio networks sends, by setting up IP carrying and/or reserving interface-free resources, for terminal be about to perform Network handover operations carry out resource preparation so that at least one business in terminal can utilize as soon as possible WLAN (wireless local area network) ready resource switch.

In technique scheme, preferably, the mark of described APN and/or IP address and described terminal, by the core net node of described terminal or described mobile radio networks, is informed described WLAN (wireless local area network) by the Access Network node of described mobile radio networks.

In this technical scheme, in a kind of situation, Access Network node can carry out by terminal the instruction forwarding resource preparation, particularly, this instruction is sent to the 3GPP network communication module in terminal by Access Network node, then by the wlan network communication module in terminal, this instruction is forwarded to WLAN (wireless local area network); In another kind of situation, Access Network node utilizes core net node to forward.Wherein, particularly, the instruction that resource prepares is after being received by the network management system of WLAN (wireless local area network) (or control system), at corresponding AP(AccessPoint, access point) carry out processing.

In technique scheme, preferably, described mobile radio networks indicate described WLAN (wireless local area network) perform described resource prepare after, also comprise: the switching that described terminal sends according to described mobile radio networks performs instruction, switch to described WLAN (wireless local area network), disconnect to make described terminal or keep being connected with the signaling between described mobile radio networks or specific service bearer.

In this technical scheme, mobile radio networks by informing that terminal performs the handover operation to WLAN (wireless local area network), thus makes terminal can realize network switching in time, avoids as much as possible losing time, shorten the time of the execution Network handover operations of terminal, contribute to realizing quick switching.

In technique scheme, preferably, also comprising: the one or more characteristic parameter that described mobile radio networks is uploaded according to described terminal, judging whether to allow described terminal to switch to described WLAN (wireless local area network) by performing described handover operation; If allow, then described mobile radio networks informs that described WLAN (wireless local area network) performs corresponding resource and prepares.

In this technical scheme, by the characteristic parameter of terminal is sent to mobile radio networks, and judge that can terminal perform Network handover operations based on these characteristic parameters, thus terminal is avoided blindly to carry out handover operation and the problems such as the kwh loss that causes cannot to switch in situation.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), described terminal sends described dynamic parameter, wherein, described dynamic parameter comprises: the real time status information of described terminal; And/or the real time status information of current activating service in described terminal.

In this technical scheme, dynamic parameter refers to that these parameters may change at any time along with time variations, the real time status information of such as terminal, comprise the position of terminal, electricity etc., and the real time status information of current activating service in terminal, comprise the volume of transmitted data etc. needed for current activating service.Preferably, terminal can when needs perform Network handover operations, the above-mentioned dynamic parameter of self is informed mobile radio networks, then these dynamic parameters are real-time parameter, contribute to mobile radio networks and judge whether terminal can perform Network handover operations more accurately.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, in described terminal from described mobile radio networks to before the handover operation of WLAN (wireless local area network) is triggered, described terminal sends described static parameter, or when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), described terminal sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: described terminal is to the support situation of described handover operation; And/or the current activating service in described terminal is to the support situation of described handover operation.

In this technical scheme, static parameter refers to some configuration parameter information etc. of terminal, be not easy to change in time, relative with above-mentioned dynamic parameter, whether such as terminal can support the security setting etc. of interoperability between mobile radio networks and WLAN (wireless local area network), terminal.Dynamic parameter and static parameter can together with send, such as all need to perform when network switches in terminal and send, then now can only by a signaling; Dynamic parameter and static parameter also can send respectively, such as before terminal needs to perform network switching, after such as terminal is connected to mobile radio networks, just static parameter is occurred to mobile radio networks, and when terminal needs to perform network switching, send dynamic parameter.

In technique scheme, preferably, the process triggering described handover operation comprises: initiatively triggered step, described terminal is detecting the network switching command that specified application inputs the demand of WLAN (wireless local area network) or user, or when searching available insertion point of radio local network, initiatively trigger described handover operation; Or passive triggered step, the Access Network node of described mobile radio networks or core net node send handover request to described terminal, make described terminal trigger described handover operation according to described handover request.

In this technical scheme, terminal can initiatively trigger network handover operation, to meet the demand of self; Terminal also can passive trigger network handover operation, thus meets the demand of mobile communications network or WLAN (wireless local area network), such as load balance etc.

In technique scheme, preferably, in described passive triggered step: described mobile radio networks sends described handover request according to predetermined period interval to described terminal; And/or described mobile radio networks is when detecting that the signal condition of described terminal does not meet preset signals condition, send described handover request to described terminal; And/or described mobile radio networks detect the offered load of self be greater than or not less than first preset offered load time, send described handover request to described terminal; And/or described WLAN (wireless local area network) is when detecting that the offered load of self is less than or is not more than the second default offered load, sends described handover request, and be forwarded to described terminal by described mobile radio networks to described mobile radio networks.

In this technical scheme, by any one in above-mentioned triggering mode or multiple combination, thus contribute to the resource rational utilization realizing 3GPP network and wlan network, avoid the practical effect excessive use of certain network being affected to network.

In technique scheme, preferably, described terminal according to the active of all WLAN (wireless local area network) or drive sweep operation, or according to the network insertion supplementary that described mobile radio networks sends, determines one or more alternative WLAN (wireless local area network); Described terminal, according to predetermined selection condition or the network alternative condition from the network node acquisition of specifying, determines described WLAN (wireless local area network) from described alternative WLAN (wireless local area network), and by the information reporting of described WLAN (wireless local area network) to described mobile radio networks.

In this technical scheme, on the one hand, terminal can scan WLAN (wireless local area network) voluntarily, to find the AP that can access; On the other hand, mobile radio networks can provide network insertion supplementary to terminal, such as advises the channel etc. of the AP list accessed, the AP list not advising access, suggestion scanning, thus contributes to the scanning process of increasing terminal.After the end of scan, for the one or more AP obtained, terminal according to the signal strength signal intensity of these AP, network transfer speeds, residing channel etc. situation, can be selected based on the network alternative condition arranged in advance, to determine that final needs switches and the AP accessed.

In technique scheme, preferably, the information of described WLAN (wireless local area network) comprise following at least one or a combination set of: the SSID of described WLAN (wireless local area network), BSSID, HESSID, channel number, clock, frequency of utilization.

In technique scheme, preferably, described mobile radio networks also perform in following determining step one of at least or combination, and determine whether to allow described terminal to perform described handover operation in conjunction with the characteristic parameter of described terminal: judge whether described mobile radio networks and/or described WLAN (wireless local area network) meet the switching condition preset to the support situation of described handover operation; Judge whether the real time status information of described mobile radio networks and/or described WLAN (wireless local area network) meets the switching condition preset; Judge whether described WLAN (wireless local area network) can support the current activating service in described terminal.

In this technical scheme, except the situation of terminal, namely outside the dynamic parameter of terminal and/or static parameter, can also the information of combining wireless mobile communications network and WLAN (wireless local area network) judge, such as whether can interoperability in support terminal network switching process, the business etc. that switches can be wished by support terminal.

In technique scheme, preferably, also comprise: described mobile radio networks provides network to select assistance information and/or terminal authentication assistance information, to be realized the selection of objective network and/or the authentication and authorization to described terminal by described WLAN (wireless local area network) for described WLAN (wireless local area network).

In this technical scheme, mobile radio networks provides above-mentioned information to WLAN (wireless local area network), thus contributes to accelerating WLAN (wireless local area network) to the authentication and authorization process of terminal, thus the Network handover operations of increasing terminal.

In technique scheme, preferably, by certification (AAA) server in described mobile radio networks and/or home subscriber (HSS) server for described WLAN (wireless local area network) provides described terminal authentication assistance information; And/or provide described network to select assistance information by access network discovery and selection function unit (ANDSF).

In technique scheme, preferably, described network selects assistance information to comprise the APN of objective network, channel number, frequency and/or clock information; Described terminal authentication assistance information comprises described mobile radio networks and carries out certification, mandate and/or signing information to described terminal.

The invention allows for a kind of network switched system, the terminal comprising mobile radio networks, WLAN (wireless local area network) and be in described mobile radio networks, wherein, described mobile radio networks comprises: communication network interactive module, for when described terminal needs business to switch to described WLAN (wireless local area network), the mark described mobile radio networks being used for the APN (APN) and/or IP address and described terminal setting up service bearer for described business informs described WLAN (wireless local area network); Described WLAN (wireless local area network) comprises: LAN interactive module, for receiving the mark of described APN (APN) and/or IP address and described terminal; LAN processing module, for the data received according to described LAN interactive module, performs corresponding resource and prepares.

In technique scheme, preferably, described LAN processing module perform described resource prepare process comprise: for described business set up IP carrying and/or reserve interface-free resources.

In technique scheme, preferably, the mark of described APN and/or IP address and described terminal is sent to the core net node of described terminal or described mobile radio networks by described communication network interactive module especially by the Access Network node of described mobile radio networks, to be forwarded to described WLAN (wireless local area network) by the core net node of described terminal or described mobile radio networks.

In technique scheme, preferably, described terminal comprises: terminal interaction module, and the switching sent for receiving described mobile radio networks performs instruction; Terminal processing module, for performing instruction according to described switching, switches to described WLAN (wireless local area network), disconnects or keep being connected with the signaling between described mobile radio networks or specific service bearer to make described terminal.

In technique scheme, preferably, described mobile radio networks also comprises: communication network processing module, for the one or more characteristic parameter uploaded according to described terminal, judges whether to allow described terminal to switch to described WLAN (wireless local area network) by performing described handover operation; Wherein, the judged result of described communication network interactive module also described communication network processing module is when allowing, and sends the mark of described APN and/or IP address and described terminal.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, then when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), described terminal sends described dynamic parameter, wherein, described dynamic parameter comprises: the real time status information of described terminal; And/or the real time status information of current activating service in described terminal.

In technique scheme, preferably, described terminal is detecting the network switching command that specified application inputs the demand of WLAN (wireless local area network) or user, or when described terminal searching is to available insertion point of radio local network, initiatively triggers described handover operation; Or the handover request that described terminal sends according to the Access Network node of described mobile radio networks or core net node, trigger described handover operation.

In technique scheme, preferably, described communication network interactive module sends described handover request according to predetermined period interval to described terminal; And/or described communication network interactive module is when described communication network processing module detects that the signal condition of described terminal does not meet preset signals condition, sends described handover request to described terminal; And/or described communication network interactive module is when described communication network processing module detects that the offered load of described mobile radio networks is greater than or not less than the first default offered load, sends described handover request to described terminal; And/or described LAN interactive module is when described LAN processing module detects that the offered load of described WLAN (wireless local area network) is less than or is not more than the second default offered load, send described handover request to described mobile radio networks, and be forwarded to described terminal by described communication network interactive module.

In technique scheme, preferably, described communication network processing module also perform in following determining step one of at least or combination, and determine whether to allow described terminal to perform described handover operation in conjunction with the characteristic parameter of described terminal: judge whether described mobile radio networks and/or described WLAN (wireless local area network) meet the switching condition preset to the support situation of described handover operation; Judge whether the real time status information of described mobile radio networks and/or described WLAN (wireless local area network) meets the switching condition preset; Judge whether described WLAN (wireless local area network) can support the current activating service in described terminal.

In technique scheme, preferably, described communication network interactive module also sends network to described WLAN (wireless local area network) and selects assistance information and/or terminal authentication assistance information, to be realized the selection of objective network and/or the authentication and authorization to described terminal by described WLAN (wireless local area network).

In technique scheme, preferably, described communication network interactive module sends described terminal authentication assistance information by certification (AAA) server in described mobile radio networks and/or home subscriber (HSS) server to described WLAN (wireless local area network); And/or described communication network interactive module sends described network selection assistance information by access network discovery and selection function unit (ANDSF).

According to another aspect of the invention, also proposed a kind of terminal, comprising: terminal processing module, for obtaining the one or more characteristic parameter of described terminal; Terminal interaction module, for described one or more characteristic parameter being sent to the mobile radio networks residing for described terminal, for described mobile radio networks when judging that described one or more characteristic parameter meets default access conditions, the mark of described terminal, resource ready message and APN and/or IP address is sent to WLAN (wireless local area network), make described WLAN (wireless local area network) based on described APN and/or IP address, for described terminal carries out resource preparation.

Wherein, by the characteristic parameter of terminal is sent to mobile radio networks, and judge that can terminal perform Network handover operations based on these characteristic parameters, thus terminal is avoided blindly to carry out handover operation and the problems such as the kwh loss that causes cannot to switch in situation.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, then described terminal interaction module is when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), send described dynamic parameter, wherein, described dynamic parameter comprises: the real time status information of described terminal; And/or the real time status information of current activating service in described terminal.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, described terminal interaction module in described terminal from described mobile radio networks to before the handover operation of WLAN (wireless local area network) is triggered, send described static parameter, or described terminal interaction module is when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), send described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: described terminal is to the support situation of described handover operation; And/or the current activating service in described terminal is to the support situation of described handover operation.

In technique scheme, preferably, described terminal interaction module also for: receive the described handover request that described mobile radio networks sends according to predetermined period interval; And/or receive described mobile radio networks and the described handover request that the signal condition of described terminal sends when not meeting preset signals condition detected; And/or receive described mobile radio networks detect the offered load of self be greater than or not less than first preset offered load time the described handover request that sends; And/or receive described WLAN (wireless local area network) detect the offered load of self be less than or be not more than second preset offered load time, through the described handover request that described mobile radio networks forwards.

In technique scheme, preferably, described terminal processing module also for: when performing described handover operation, disconnecting or keeping being connected with the signaling between described mobile radio networks or specific service bearer.

By above technical scheme, mobile radio networks can be made to help terminal realization to the access operation of WLAN (wireless local area network), optimize the interoperability between mobile radio networks and WLAN (wireless local area network).

Accompanying drawing explanation

Fig. 1 shows the schematic flow sheet of method for switching network according to an embodiment of the invention;

Fig. 2 shows the schematic block diagram of network switched system according to an embodiment of the invention;

Fig. 3 shows the schematic flow sheet of method for switching network according to an embodiment of the invention;

Fig. 4 shows terminal according to an embodiment of the invention performs the idiographic flow that network switches schematic diagram from 3GPP to WLAN from;

Fig. 5 A and Fig. 5 B shows terminal according to an embodiment of the invention and performs the idiographic flow of network switching and the schematic diagram of Signalling exchange from 3GPP to WLAN;

Fig. 6 shows the schematic block diagram of terminal according to an embodiment of the invention.

Embodiment

In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.

Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.

Fig. 1 shows the schematic flow sheet of method for switching network according to an embodiment of the invention.

As shown in Figure 1, method for switching network according to an embodiment of the invention, comprise: step 102, when being in the terminal in mobile radio networks and needing business to switch to WLAN (wireless local area network), the mark being used for the APN (APN) and/or IP address and described terminal of setting up service bearer for described business is informed described WLAN (wireless local area network) by described mobile radio networks, prepares to be performed corresponding resource by described WLAN (wireless local area network).

In technique scheme, preferably, after the described WLAN (wireless local area network) of specifying of described mobile radio networks instruction performs the preparation of described resource, also comprise: the switching that described terminal sends according to described mobile radio networks performs instruction, switch to described WLAN (wireless local area network), disconnect to make described terminal or keep being connected with the signaling between described mobile radio networks or specific service bearer.

In technique scheme, preferably, described mobile radio networks also perform in following determining step one of at least or combination, and determine whether to allow described terminal to perform described handover operation in conjunction with the characteristic parameter of described terminal: judge whether described mobile radio networks and/or described WLAN (wireless local area network) of specifying meet the switching condition preset to the support situation of described handover operation; Judge whether the real time status information of described mobile radio networks and/or described WLAN (wireless local area network) meets the switching condition preset; Judge whether described WLAN (wireless local area network) can support the current activating service in described terminal.

Fig. 2 shows the schematic block diagram of network switched system according to an embodiment of the invention.

As shown in Figure 2, network switched system 200 according to an embodiment of the invention, comprise mobile radio networks 202, WLAN (wireless local area network) 204 and the terminal 206 be in described mobile radio networks 202, wherein, described mobile radio networks 202 comprises: communication network interactive module 202A, for when described terminal 206 needs business to switch to described WLAN (wireless local area network) 204, the mark described mobile radio networks 202 being used for the APN (APN) and/or IP address and described terminal setting up service bearer for described business informs described WLAN (wireless local area network) 204, described WLAN (wireless local area network) 204 comprises: LAN interactive module 204A, for receiving the mark of described APN (APN) and/or IP address and described terminal, LAN processing module 204B, for the data received according to described LAN interactive module 204A, performs corresponding resource and prepares.

In this technical scheme, mobile radio networks 202 is that the handover operation that terminal 206 is about to perform carries out resource preparation by signaling WLAN (wireless local area network), thus contributes to improving handover success rate, shortening switching time.Be in because terminal 206 is current in mobile radio networks 202, thus mobile radio networks 202 can learn that terminal 206 is the need of execution Network handover operations easily, such as terminal 206, when needs perform Network handover operations, can send relevant message to mobile radio networks 202.Wherein, wireless mobile communications (WirelessMobileCommunication) network and 3GPP network, such as GSM, CDMA etc.

In technique scheme, preferably, described LAN processing module 204B perform described resource prepare process comprise: for described business set up IP carrying and/or reserve interface-free resources.

In this technical scheme, WLAN (wireless local area network) is after the instruction receiving the resource preparation that mobile radio networks 202 sends, by setting up IP carrying and/or reserving interface-free resources, the Network handover operations being about to perform for terminal 206 carries out resource preparation, so as at least one business in terminal 206 can utilize as soon as possible WLAN (wireless local area network) ready resource switch.

In technique scheme, preferably, the mark of described APN and/or IP address and described terminal is sent to the core net node of described terminal 206 or described mobile radio networks 202 by described communication network interactive module 202A especially by the Access Network node of described mobile radio networks 202, to be forwarded to described WLAN (wireless local area network) 204 by the core net node of described terminal 206 or described mobile radio networks 202.

In this technical scheme, in a kind of situation, Access Network node can carry out by terminal 206 instruction forwarding resource preparation, particularly, this instruction is sent to the 3GPP network communication module in terminal 206 by Access Network node, then by the wlan network communication module in terminal 206, this instruction is forwarded to WLAN (wireless local area network); In another kind of situation, Access Network node utilizes core net node to forward.Wherein, particularly, the instruction that resource prepares is after being received by the network management system of WLAN (wireless local area network) (or control system), at corresponding AP(AccessPoint, access point) carry out processing.

In technique scheme, preferably, described terminal 206 comprises: terminal interaction module 206A, and the switching sent for receiving described mobile radio networks 202 performs instruction; Terminal processing module 206B, for performing instruction according to described switching, switches to described WLAN (wireless local area network) 204, disconnects or keep the signaling between described mobile radio networks 202 to be connected or specific service bearer to make described terminal 206.

In this technical scheme, mobile radio networks 202 is by informing that terminal 206 performs the handover operation to WLAN (wireless local area network), thus make terminal 206 can realize network switching in time, avoid as much as possible losing time, shorten the time of the execution Network handover operations of terminal 206, contribute to realizing quick switching.

In technique scheme, preferably, described mobile radio networks 202 also comprises: communication network processing module 202B, for the one or more characteristic parameter uploaded according to described terminal 206, judge whether to allow described terminal 206 to switch to described WLAN (wireless local area network) 204 by performing described handover operation; Wherein, the judged result of described communication network interactive module 202A also described communication network processing module 202B is when allowing, and sends the mark of described APN and/or IP address and described terminal.

In this technical scheme, by the characteristic parameter of terminal 206 is sent to mobile radio networks 202, and judge that can terminal 206 perform Network handover operations based on these characteristic parameters, thus terminal 206 is avoided blindly to carry out handover operation and the problems such as the kwh loss that causes cannot to switch in situation.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, then when described terminal 206 is triggered from described mobile radio networks 202 to the handover operation of WLAN (wireless local area network), described terminal 206 sends described dynamic parameter, wherein, described dynamic parameter comprises: the real time status information of described terminal 206; And/or the real time status information of current activating service in described terminal 206.

In this technical scheme, dynamic parameter refers to that these parameters may change at any time along with time variations, the such as real time status information of terminal 206, comprise the position of terminal 206, electricity etc., and the real time status information of current activating service in terminal 206, comprise the volume of transmitted data etc. needed for current activating service.Preferably, terminal 206 can when needs perform Network handover operations, the above-mentioned dynamic parameter of self is informed mobile radio networks 202, then these dynamic parameters are real-time parameter, contribute to mobile radio networks 202 and judge whether terminal 206 can perform Network handover operations more accurately.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, in described terminal 206 from described mobile radio networks 202 to before the handover operation of WLAN (wireless local area network) is triggered, described terminal 206 sends described static parameter, or when described terminal 206 is triggered from described mobile radio networks 202 to the handover operation of WLAN (wireless local area network), described terminal 206 sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: described terminal 206 is to the support situation of described handover operation; And/or the current activating service in described terminal 206 is to the support situation of described handover operation.

In this technical scheme, static parameter refers to some configuration parameter information etc. of terminal 206, be not easy to change in time, relative with above-mentioned dynamic parameter, whether such as terminal 206 can support the security setting etc. of interoperability between mobile radio networks 202 and WLAN (wireless local area network), terminal 206.Dynamic parameter and static parameter can together with send, such as all need to perform when network switches in terminal 206 and send, then now can only by a signaling; Dynamic parameter and static parameter also can send respectively, such as before terminal 206 needs to perform network switching, after such as terminal 206 is connected to mobile radio networks 202, just static parameter is occurred to mobile radio networks 202, and when terminal 206 needs to perform network switching, send dynamic parameter.

In technique scheme, preferably, described terminal 206 is detecting the network switching command that specified application inputs the demand of WLAN (wireless local area network) or user, or when described terminal 206 searches available insertion point of radio local network, initiatively triggers described handover operation; Or the handover request that described terminal 206 sends according to the Access Network node of described mobile radio networks 202 or core net node, trigger described handover operation.

In this technical scheme, terminal 206 can initiatively trigger network handover operation, to meet the demand of self; Terminal 206 also can passive trigger network handover operation, thus meets the demand of mobile communications network or WLAN (wireless local area network), such as load balance etc.

In technique scheme, preferably, described communication network interactive module 202A sends described handover request according to predetermined period interval to described terminal 206; And/or described communication network interactive module 202A is when described communication network processing module 202B detects that the signal condition of described terminal 206 does not meet preset signals condition, sends described handover request to described terminal 206; And/or described communication network interactive module 202A is when described communication network processing module 202B detects that the offered load of described mobile radio networks 202 is greater than or not less than the first default offered load, sends described handover request to described terminal 206; And/or described LAN interactive module 204A is when described LAN processing module 204B detects that the offered load of described WLAN (wireless local area network) 204 is less than or is not more than the second default offered load, send described handover request to described mobile radio networks 202, and be forwarded to described terminal 206 by described communication network interactive module 202A.

In technique scheme, preferably, described terminal 206 according to the active of all WLAN (wireless local area network) or drive sweep operation, or according to the network insertion supplementary that described mobile radio networks 202 sends, determines one or more alternative WLAN (wireless local area network); Described terminal 206 is according to predetermined selection condition or the network alternative condition from the network node acquisition of specifying, described WLAN (wireless local area network) 204 is determined from described alternative WLAN (wireless local area network), and by the information reporting of described WLAN (wireless local area network) 204 to described mobile radio networks 202.

In this technical scheme, on the one hand, terminal 206 can scan WLAN (wireless local area network) voluntarily, to find the AP that can access; On the other hand, mobile radio networks 202 can provide network insertion supplementary to terminal 206, such as advises the channel etc. of the AP list accessed, the AP list not advising access, suggestion scanning, thus contributes to the scanning process of increasing terminal 206.After the end of scan, for the one or more AP obtained, terminal 206 according to the signal strength signal intensity of these AP, network transfer speeds, residing channel etc. situation, can be selected based on the network alternative condition arranged in advance, to determine that final needs switches and the AP accessed.

In technique scheme, preferably, the information of described WLAN (wireless local area network) 204 comprise following at least one or a combination set of: the SSID of described WLAN (wireless local area network), BSSID, HESSID, channel number, clock, frequency of utilization.

In technique scheme, preferably, described communication network processing module 202B also perform in following determining step one of at least or combination, and determine whether to allow described terminal 206 to perform described handover operation in conjunction with the characteristic parameter of described terminal 206: judge whether described mobile radio networks 202 and/or described WLAN (wireless local area network) 204 meet the switching condition preset to the support situation of described handover operation; Judge whether the real time status information of described mobile radio networks 202 and/or described WLAN (wireless local area network) 204 meets the switching condition preset; Judge whether described WLAN (wireless local area network) 204 can support the current activating service in described terminal 206.

In this technical scheme, except the situation of terminal 206, namely outside the dynamic parameter of terminal 206 and/or static parameter, can also the information of combining wireless mobile communications network 202 and WLAN (wireless local area network) judge, such as whether can interoperability in support terminal 206 network switching process, the business etc. that switches can be wished by support terminal 206.

In technique scheme, preferably, described communication network interactive module 202A also sends network to described WLAN (wireless local area network) 204 and selects assistance information and/or terminal authentication assistance information, to be realized by described WLAN (wireless local area network) 204 selection of objective network and/or the authentication and authorization to described terminal 206.

In this technical scheme, mobile radio networks 202 provides above-mentioned information to WLAN (wireless local area network), thus contributes to accelerating WLAN (wireless local area network) to the authentication and authorization process of terminal 206, thus the Network handover operations of increasing terminal 206.

In technique scheme, preferably, described communication network interactive module 202A sends described terminal authentication assistance information by certification (AAA) server in described mobile radio networks 202 and/or home subscriber (HSS) server to described WLAN (wireless local area network) 204; And/or described communication network interactive module 202A sends described network selection assistance information by access network discovery and selection function unit (ANDSF).

In technique scheme, preferably, described network selects assistance information to comprise the APN of objective network, channel number, frequency and/or clock information; Described terminal authentication assistance information comprises described mobile radio networks 202 and carries out certification, mandate and/or signing information to described terminal 206.

Fig. 3 shows the schematic flow sheet of method for switching network according to an embodiment of the invention.

As shown in Figure 3, method for switching network according to an embodiment of the invention, mainly can be divided into three phases, i.e. step 302: the handover trigger stage; Step 304: handover evaluation stage; Step 306: handover execution stage.

Wherein, in the handover trigger stage, by triggering terminal by the handover operation of 3GPP network to wlan network; In the handover evaluation stage, whether will be allowed to perform above-mentioned handover operation to terminal and assess, and if allow, then enter handover execution stage, otherwise do not perform.

Below in conjunction with Fig. 4 to Fig. 5 B, the technical scheme of the present invention shown in Fig. 3 is described in detail.

As shown in Figure 4, show terminal according to an embodiment of the invention performs network switching idiographic flow from 3GPP to WLAN from, comprising:

Step 402, trigger flow.This step corresponds to the handover trigger stage shown in Fig. 3.

Particularly, can be divided into " cycle triggering " or " event triggering " according to the formal classification handover trigger triggering switching behavior generation; From triggering the main body classification switched, handover trigger can be divided into " network-triggered " or " user's triggering ".Concrete handoff scenario is as follows:

User triggers

● due to the handover request that certain demand of user (e.g., upper layer application or the subjective demand of user) triggers.

● user terminal independently finds available wlan network and the handover request triggered.

Network-triggered

● due to certain strategy (carrying out triage operator as utilized WLAN) of operator, the handover request of periodic triggers.

● worsen because user moves the 3GPP network signal caused, the handover request of triggering.Certain threshold T is set ₁, when user from 3GPP network reception to signal quality or/and when intensity is lower than this threshold value, trigger switch.

● because 3GPP offered load is overweight, the switching flow based on load balancing triggered by 3GPP network side.According to the reference information that " offered load state " provides, one threshold value L is set _3GPP, as the actual loading L>L of 3GPP network _3GPPtime, trigger and switch.

Due to wlan network underload, the handover request of triggering.According to the reference information that " offered load state " provides, one threshold value L is set _wLAN, as the actual loading L<L of wlan network _wLANtime, trigger and switch.Wlan network notifies 3GPP core net by interface between 3GPP network (the STa/STb/STc interface as linked with aaa server), and has 3GPP network to initiate to switch.

Step 404, terminal reports the information of alternative network to 3GPP network.

In fact this step implies the discovery procedure for alternative network:

(1) mode (active scan and/or drive sweep) that provides according to WLAN agreement of terminal, performance objective network discovery process.

(2) the network insertion supplementary that provides for it according to 3GPP network of terminal, such as advise the list of the AP accessed, do not advise the list of the AP accessed, the channel of suggestion scanning, do not advise more preparing the channel etc. that scans, perform scanning to objective network rapidly, targetedly.Certainly, the AP that certain is determined also directly may be informed terminal by 3GPP network, determines that it can connect by terminal.

The handover evaluation stage shown in Fig. 3 divides in order to three steps by step 406A, step 406B and step 408 further, wherein:

Step 406A, access state is assessed.Access state assessment comprises the following one or more information of assessment:

● wlan network " offered load state " confirms.Determine whether wlan network allows to switch according to " the offered load state " of wlan network.

● wlan network " network admittance state " confirms.Determine whether to allow to perform switching according to " the network admittance state " of wlan network.

3GPP network is by obtaining " offered load state " and " network admittance state " information of WLAN with under type:

-obtain above-mentioned state information by wlan network and the internetwork standard interface of 3GPP (the STa/STb/STc interface as linked with aaa server).

-obtain above-mentioned state information by the direct interface between WLAN Access Network and 3GPP Access Network.

-obtain above-mentioned state information by the WLAN module of user side and the internal interface/signaling of 3GPP intermodule.

● " user's access grade " is or/and " service access grade " confirms.According to active user or/and " user's access grade " of current service switchover is or/and " service access grade " judges whether current switching behavior allows to occur.

Step 406B, switching capability is assessed.Switching capability assessment comprises the following one or more ability whether possessing switching of assessment:

● WLAN " network interoperability ability " confirms.Whether interoperability is possessed according to " network interoperability ability " validation of information wlan network that network is grasped; Or/and whether allow interoperability for certain specific type of service; Or/and support the interoperability of which kind of mode (single connection is or/and multi-link (the WLAN version of single-connectionand/ormulti-connection, support is as 802.11a/b/g/n)).

● 3GPP " network interoperability ability " determines.Whether interoperability is possessed according to " network interoperability ability " validation of information 3GPP network that network is grasped; Or/and whether allow interoperability for certain specific type of service; Or/and support the interoperability of which kind of mode (single connection is or/and multi-link (single-connectionand/ormulti-connection)).

● " user contract authority " confirms.Whether interoperability is allowed according to user " user contract authority " the validation of information user that network is grasped; Or/and whether allow interoperability for certain specific type of service; Or/and support the interoperability of which kind of mode.

● " ability of user terminal " confirms.Whether interoperability is possessed according to " ability of user terminal " validation of information user terminal that network is grasped; Or/and whether chant wadding interoperability for certain specific type of service; Or/and support the interoperability of which kind of mode (single connection is or/and multi-link (the WLAN version of single-connectionand/ormulti-connection, support is as 802.11a/b/g/n)) and parameter.

Step 408, handoff scenario assessment and decision-making.Finally determine whether to allow to switch according to the assessment result of step 406A and step 406B and " type of service " of current service switchover, wherein, when step 406A and step 406B assessment is judged to permission switching, perform following judgement:

● " type of service " of the current activating service of user, when objective network (wlan network) cannot be obtained support (as CS territory business), forbids switching; Otherwise, allow to switch (entering step 410).

● " the quality of service grade QoS " of the current activating service of user objective network (wlan network) cannot be obtained meet time, forbid switching; Otherwise, allow to switch.

If ● allow to switch, then need to carry out service feature mapping according to " service feature " of current activating service.Particularly:

-need according to " quality of service grade " information, and according to the QoS rule of target and source network definition by current activating service from 3GPP network mapping to wlan network.

-need according to " service access grade " information, and according to target and source network definition service access hierarchy rules, by current activating service from 3GPP network mapping to wlan network.

Handover execution stage shown in Fig. 3 is divided in order to five steps to step 418 by step 410 further, wherein:

Step 410, enters handover execution stage.

Step 412, user accesses (joining).According to the alternative network information that step 404 obtains, access wlan system.This step completes according to existing WLAN agreement.

Step 414, certification (Authentication) and mandate (authorization).User is synchronous and be connected to wlan system, performs authentication and authorization process.Information sharing based on associating aaa server and HSS server completes by this step.

Step 416, wlan network resource prepares.In this step, 3GPP network instruction wlan network is be about to switch the business arrived to set up carrying according to the qos requirement obtained in " handoff scenario assessment and decision-making " or service access grade.After this step completes, stopping is transmitted data to user by 3GPP network.

Particularly, there are two kinds of implementations in above-mentioned steps:

resource based on Access Network prepares.First send related signaling or message by the Access Network node of 3GPP network, received by the 3GPP module in terminal; Then, WLAN module passes through the internal interface/signaling of 3GPP module and WLAN module in terminal, obtains above-mentioned signaling or message; Finally, notify that wlan network side is be about to switch the business come to set up IP carrying by the WLAN module in terminal.

resource based on core net prepares.First, the Access Network node notice core net node of 3GPP network, then by the interface between 3GPP and wlan system webmaster/control system, notified webmaster or the control system of wlan network by 3GPP core net, request WLAN is about to switch the business come in wlan network, set up IP carrying and/or reserve interface-free resources.

Step 418, UE(UserEquipment, subscriber equipment, i.e. terminal) connect switching.In this step, 3GPP network advertisement terminal performs the handover operation to wlan network, specifically comprises:

" core net is to 3GPP base station ".In this process, 3GPP Access Network node (as base station) is notified by 3GPP core net node: terminal can perform handover operation to WLAN.

" 3GPP base station is to terminal ".In this process, 3GPP Access Network node notification terminal performs handover operation to wlan network.

Further, 3GPP base station can also notification terminal: be connected the signaling between terminal with 3GPP network and process, and such as continues to retain or interrupt.

So far, each step in Fig. 4 describes the entire flow that terminal is carried out to wlan network by 3GPP network switching.

Below in conjunction with Fig. 5 A and Fig. 5 B, the signalling interactive process related in the steps flow chart shown in Fig. 4 is described in detail.

As shown in Figure 5A, the process of terminal execution Network handover operations comprises:

Step 1, terminal (as UE) is in 3GPP network, and initiatively trigger or passive triggering to the handover operation of wlan network.

Be similar to the trigger flow of the step 402 shown in Fig. 4, repeat no more herein.But 3GPP network is sent to the process of network insertion supplementary to terminal, comprising:

The Access Network node (as eNB, i.e. base station) of 3GPP network or core net node (as MME, MobileManagementEntity, mobile management entity) generate and switch assistance messages frame, switch assistance messages frame and at least comprise network insertion supplementary.

Step 2, terminal generating feature parameter message frame, characteristic parameter message frame can comprise dynamic parameter and static parameter, and characteristic parameter message frame is sent to the Access Network node of 3GPP network.

Particularly, dynamic parameter refers to that these parameters may change at any time along with time variations, comprising:

The real time status information of terminal;

And/or the real time status information of current activating service in terminal.

Static parameter refers to some configuration parameter information etc. of terminal, is not easy to change in time, relative with above-mentioned dynamic parameter, comprising:

Terminal is to the support situation of handover operation;

And/or the current activating service in terminal is to the support situation of handover operation.

Concrete signalling comprises multiple situation:

(1) when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), terminal generates terminal feature parameter message frame, and terminal feature parameter message frame at least comprises the one or more dynamic parameter of terminal, one or more static parameter.

Particularly, this terminal feature parameter message frame can be RRC signaling, such as UE capability transmission (UEcapabilitytransfer) signaling, and described characteristic parameter is arranged in user equipment network performance (UEnetworkcapability) information element of described RRC signaling.Certainly, also can adopt the reservation position in other information elements in this signaling, or existing information element be expanded to the one or more positions obtained.

Or terminal feature parameter message frame also can be other RRC signaling, the dedicated signaling such as redefined.

(2) when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), terminal generates static parameter message frame, wherein comprise one or more static parameter, terminal also generates dynamic parameter message frame, wherein comprises one or more dynamic parameter.

(3) in described terminal from described mobile radio networks to before the handover operation of WLAN (wireless local area network) is triggered, terminal generates static parameter message frame, wherein comprises one or more static parameter; When described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), terminal generates dynamic parameter message frame, wherein comprises one or more dynamic parameter.

For the situation of (2), (3), static parameter message frame can be RRC signaling, such as UE capability transmission (UEcapabilitytransfer) signaling, and described characteristic parameter is arranged in user equipment network performance (UEnetworkcapability) information element of described RRC signaling.Certainly, also can adopt the reservation position in other information elements in this signaling, or existing information element be expanded to the one or more positions obtained.

And dynamic parameter message frame can for the dedicated signaling redefined.

Step 3, Access Network node judges that can terminal perform Network handover operations.

In this step, the object of judgement comprises the characteristic parameter that terminal is uploaded in step 2, but is not limited to this.In fact, for terminal, network and business, all include respective characteristic parameter, such as:

● " service feature "

" service feature " of the present invention's definition, the characteristic information at line service when referring to initiate to switch in terminal, comprises with next class or multiclass information:

-type of service: CS territory class business, Traditional IP data service, VoIP speech business etc.

-quality of service grade: refer to be formulated according to type of service feature by operator, describe the QoS grade of certain specific transactions, as tolerable packet delay, tolerable packet loss, priority, resource type, maximum bit rate etc.

-service access grade: this parameter can be formulated according to migration efficiency by operator, describes the priority level of certain specific transactions access objective network.

● " network characterization "

" network characterization " refers to switch objective network (as wlan network) and switch the network state information of initiating network (as 3GPP network), comprises with next class or multiclass information:

-network interoperability ability: refer to objective network and switch initiate the interoperability that possesses of network or/and the interoperability that possesses a certain specific transactions.

-network admittance state: refer to that objective network is current and whether allow interoperability behavior or/and whether possess access capability.

-offered load state: comprise with next class or multiclass information.

-physical resource utilization rate: the utilization rate representing the current physical resource of current time WLANAP and 3GPP base station.

-hardware device utilance: the utilization rate representing the hardware device such as current time WLANAP and 3GPP base station CUP, buffering.

-excited user number: represent excited user number in current time WLANAP and 3GPP community.

Amount that handle up in-community (stream): the throughput total amount representing current time WLANAP and 3GPP base station.

● " terminal feature "

" terminal feature " refer to terminal at WLAN or/and the user of 3GPP network contracts the ability information of characteristic information and terminal, comprise with next class or multiclass information:

-user access grade: operator be user access WLAN or/and 3GPP time the access priority information that defines.

-user contracts authority: operator for user carry out WLAN and 3GPP interoperability time, the interoperability authority of definition.

Ability of user terminal: user terminal supports the interoperability GL information of WLAN and 3GPP network.These ability information comprise: whether terminal possesses WLAN/3GPP access capability, the interoperability (Interworking) of user terminal WLAN/3GPP system, the WLAN speed (Supportedrates) that terminal is supported, the WLAN channel (supportedchannelselements) etc. of support.

In fact, just based on the information of above-mentioned characteristic parameter, the just specific implementation operation in the handover evaluation stages such as the step 406A shown in Fig. 4, step 406B and step 408.

Wherein, the terminal feature parameter etc. used required in assessing for the switching capability performed in step 406B, can utilize the RRC signaling of existing or new definition to transmit:

-utilize " UEnetworkcapability " (terminal network ability) IE of " Attachrequest " (additional request frame) to transmit relevant ability.Concrete, utilize the reserved byte of this IE, adopt the mode transmission capacity information of bitmap, whether the bit as the Eight characters of this IE saved (octet) is supported the switching capability of WLAN as mark UE and is supported the mark of which kind of handover operation.

-utilizing existing RRC " UEcapabilitytransfer " (terminal capability transmission) signaling, the parameter IE that newly-increased WLAN is relevant in this signaling, as " UE-interRAT-ParametersWlan " IE.

-Xin defines special RRC signaling, as " WLANcapabilityinformation " (WLAN capability information message frame) transmits this information.

Although illustrated in Fig. 5 A by terminal in step 2 to Access Network node reporting terminal characteristic parameter message frame, and the judgement that can access wlan network to terminal is performed in step 3 by Access Network node, but these two steps in fact also exist other implementations, such as:

Step 2a(is not shown), terminal feature parameter message frame is sent to core net node by terminal.

Step 3a(is not shown), core net node judges that can terminal perform handover operation.

Step 4, terminal is to Access Network node report network informational message frame.

In a kind of situation, in network information messages frame, include the information that needs that terminal chooses perform the objective network of access, one or more in SSID, the BSSID, HESSID, channel number, clock, frequency of utilization etc. of such as WLAN (wireless local area network).

In another kind of situation, the information of the alternative objective network that multiple terminal detects is included in network information messages frame, be that terminal selects an objective network for accessing for 3GPP network, then in this case, in fact also need to be selected by 3GPP network, and selection result is returned to terminal (not shown).

Step 5a to 6a, Access Network node sends resource to core net node and prepares message frame, and is forwarded to wlan network by core net node.

Particularly, resource prepares message frame and at least comprises terminal iidentification, resource ready message and APN (APN) or IP address, wherein, resource ready message is used to indicate wlan network based on APN and/or IP address, for the specified services of terminal corresponding to terminal iidentification carries out resource preparation, specifically comprise and set up IP carrying for described specified services and/or reserve interface-free resources.

It can be the S1 signaling of that had or new definition that resource prepares message frame, also can be the dedicated signaling of other new definition.Such as handover request frame (HandoverRequired), may need transmit information and method as follows:

-3GPP base station (Access Network node) is to MME(core net node) send message " HandoverRequired " to MME, and inform core-network side by the value " ltetowlan " of definition new in " HandoverType " IE in " HandoverRequired " message, this time switching is the interoperability process with wlan system.

Target network identity (/HESSID/BSSID) is passed to objective network by " TargetID " IE in " HandoverRequired " message by-base station.

The information such as UE ability, address are transmitted to wlan network by " Source-ToTarget-TransparentContainer " in " HandoverRequired " message in-base station.

-base station can point out that by " Cause " in " HandoverRequired " message this switches the interoperability belonging to WLAN.

Step 7, core net node sends the first Indication message frame to Access Network node, be used to indicate: terminal can perform the handover operation to wlan network, namely now enters handover execution stage.

Particularly, the first Indication message frame can be S1 signaling, such as:

-MME sends message " Handovercommand " to 3GPP base station, and by value " ltetowlan " signals base defined new in " HandoverType " IE in " Handovercommand " message, this time switching is the interoperability process with wlan system.

-necessary information needed for access wlan network can also be transmitted as APN((AccessPointName by " TargettoSourceTransparentContainer " in " Handovercommand ", APN) or IP address.

Step 8, Access Network node sends the second Indication message frame to terminal, is used to indicate the handover operation of terminal execution to wlan network.

Particularly, the second Indication message frame can be RRC signaling, such as:

-3GPP base station sends message " MobilityFromEUTRACommand " to user, is carried out the transmission of information needed by newly-built " mobilityFromEUTRACommand-r12 " IE.

-also passable, 3GPP base station sends message " MobilityFromEUTRACommand " to user, is completed the transmission of information needed by the mode expanded the signaling elements of existing " mobilityFromEUTRACommand-r8 " or " mobilityFromEUTRACommand-r9 ".

May need transmit information and method as follows:

-the value " wlan " that newly defined by " targetRAT-Type " IE indicates this operation to be the interoperability with wlan system.

-" targetRAT-MessageContainer " IE can also be utilized to transmit the information of connection WLAN needs as APN or IP address.

Step 9, terminal performs the handover operation to wlan network.

Step 10, Access Network node sends the 3rd Indication message frame to terminal, is used to indicate terminal and is connected with the signaling of 3GPP network it and processes, comprise and continue to retain or interrupt the connection of this signaling.

3rd Indication message frame can be RRC signaling that is existing or that redefine.

It should be noted that:

Although be step 10 shown in figure, the 3rd Indication message frame also can complete before step 9, do not need to realize on the basis of step 9.

Further, in fact the content in the 3rd Indication message frame can be included in the second Indication message frame, thus after terminal receives the second Indication message frame, performs the handover operation to wlan network on the one hand, and process is connected with the signaling of 3GPP network on the other hand.

Above based on Fig. 5 A and step 1-10, specifically describe the process that terminal performs Network handover operations; And Fig. 5 B describes similar process equally, but there are some differences with Fig. 5 A:

Step 5b-6b, Access Network node sends resource to terminal and prepares message frame, and is forwarded to wlan network by terminal.

Above-mentioned steps corresponds to the step 5a-6a shown in Fig. 5 A, is actually different send modes resource being prepared to message frame.Specifically, resource is prepared the 3GPP network communication module that message frame is sent to terminal by Access Network node, then based on the internal interface/signaling by 3GPP network communication module in terminal and wlan network communication module, wlan network communication module obtains this resource and prepares message frame, and is sent to wlan network.

Other steps in Fig. 5 B are identical with Fig. 5 A, repeat no more herein.

In addition, in Fig. 5 A and Fig. 5 B, also show HLR/HSS(HLR, HomeLocationRegister, attaching position register; Or HSS, HomeSubscriberServer, home subscriber server), and aaa server, also have not shown access network discovery and selection function unit (ANDSF).In 3GPP network, above-mentioned server is mainly used in the authentication and authorization in terminal access procedure.

And in terminal from 3GPP network to the handoff procedure of wlan network, required information can be provided based on the said equipment to wlan network, to accelerate the authentication and authorization process of wlan network to terminal, such as:

Described terminal authentication assistance information is sent to wlan network by aaa server and/or HSS/HLR;

And/or send network selection assistance information by ANDSF to wlan network.

As shown in Figure 6, terminal 600 according to an embodiment of the invention, comprising: terminal processing module 602, for obtaining the one or more characteristic parameter of described terminal 600; Terminal interaction module 604, for described one or more characteristic parameter being sent to the mobile radio networks residing for described terminal 600, for described mobile radio networks when judging that described one or more characteristic parameter meets default access conditions, the mark of described terminal, resource ready message and APN and/or IP address is sent to WLAN (wireless local area network), make described WLAN (wireless local area network) based on described APN and/or IP address, for described terminal 600 carries out resource preparation.

In this technical scheme, mobile radio networks is that the handover operation that terminal 600 is about to perform carries out resource preparation by signaling WLAN (wireless local area network), thus contributes to improving handover success rate, shortening switching time.Be in mobile radio networks because terminal 600 is current, thus mobile radio networks can learn that terminal 600 is the need of execution Network handover operations easily, such as terminal 600, when needs perform Network handover operations, can send relevant message to mobile radio networks.Wherein, wireless mobile communications (WirelessMobileCommunication) network and 3GPP network, such as GSM, CDMA etc.

Wherein, by the characteristic parameter of terminal 600 is sent to mobile radio networks, and judge that can terminal 600 perform Network handover operations based on these characteristic parameters, thus terminal 600 is avoided blindly to carry out handover operation and the problems such as the kwh loss that causes cannot to switch in situation.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, then terminal interaction module 604 is when described terminal 600 is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), send described dynamic parameter, wherein, described dynamic parameter comprises: the real time status information of described terminal 600; And/or the real time status information of current activating service in described terminal 600.

In this technical scheme, dynamic parameter refers to that these parameters may change at any time along with time variations, the such as real time status information of terminal 600, comprise the position of terminal 600, electricity etc., and the real time status information of current activating service in terminal 600, comprise the volume of transmitted data etc. needed for current activating service.Preferably, terminal 600 can when needs perform Network handover operations, the above-mentioned dynamic parameter of self is informed mobile radio networks, then these dynamic parameters are real-time parameter, contribute to mobile radio networks and judge whether terminal 600 can perform Network handover operations more accurately.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, terminal interaction module 604 in described terminal 600 from described mobile radio networks to before the handover operation of WLAN (wireless local area network) is triggered, send described static parameter, or terminal interaction module 604 is when described terminal 600 is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), send described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: described terminal 600 is to the support situation of described handover operation; And/or the current activating service in described terminal 600 is to the support situation of described handover operation.

In this technical scheme, static parameter refers to some configuration parameter information etc. of terminal 600, be not easy to change in time, relative with above-mentioned dynamic parameter, whether such as terminal 600 can support the security setting etc. of interoperability between mobile radio networks and WLAN (wireless local area network), terminal 600.Dynamic parameter and static parameter can together with send, such as all need to perform when network switches in terminal 600 and send, then now can only by a signaling; Dynamic parameter and static parameter also can send respectively, such as before terminal 600 needs to perform network switching, after such as terminal 600 is connected to mobile radio networks, just static parameter is occurred to mobile radio networks, and when terminal 600 needs to perform network switching, send dynamic parameter.

In technique scheme, preferably, described terminal 600 is detecting the network switching command that specified application inputs the demand of WLAN (wireless local area network) or user, or when described terminal 600 searches available insertion point of radio local network, initiatively triggers described handover operation; Or the handover request that described terminal 600 sends according to the Access Network node of described mobile radio networks or core net node, trigger described handover operation.

In this technical scheme, terminal 600 can initiatively trigger network handover operation, to meet the demand of self; Terminal 600 also can passive trigger network handover operation, thus meets the demand of mobile communications network or WLAN (wireless local area network), such as load balance etc.

In technique scheme, preferably, described terminal interaction module 604 also for: receive the described handover request that described mobile radio networks sends according to predetermined period interval; And/or receive described mobile radio networks and the described handover request that the signal condition of described terminal 600 sends when not meeting preset signals condition detected; And/or receive described mobile radio networks detect the offered load of self be greater than or not less than first preset offered load time the described handover request that sends; And/or receive described WLAN (wireless local area network) detect the offered load of self be less than or be not more than second preset offered load time, through the described handover request that described mobile radio networks forwards.

In technique scheme, preferably, described terminal 600 according to the active of all WLAN (wireless local area network) or drive sweep operation, or according to the network insertion supplementary that described mobile radio networks sends, determines one or more alternative WLAN (wireless local area network); Described terminal 600, according to predetermined selection condition or the network alternative condition from the network node acquisition of specifying, determines described WLAN (wireless local area network) from described alternative WLAN (wireless local area network), and by the information reporting of described WLAN (wireless local area network) to described mobile radio networks.

In this technical scheme, on the one hand, terminal 600 can scan WLAN (wireless local area network) voluntarily, to find the AP that can access; On the other hand, mobile radio networks can provide network insertion supplementary to terminal 600, such as advises the channel etc. of the AP list accessed, the AP list not advising access, suggestion scanning, thus contributes to the scanning process of increasing terminal 600.After the end of scan, for the one or more AP obtained, terminal 600 according to the signal strength signal intensity of these AP, network transfer speeds, residing channel etc. situation, can be selected based on the network alternative condition arranged in advance, to determine that final needs switches and the AP accessed.

In technique scheme, preferably, described terminal processing module 602 also for: when performing described handover operation, disconnecting or keeping being connected with the signaling between described mobile radio networks or specific service bearer.

In this technical scheme, mobile radio networks is by informing that terminal 600 performs the handover operation to WLAN (wireless local area network), thus make terminal 600 can realize network switching in time, avoid as much as possible losing time, shorten the time of the execution Network handover operations of terminal 600, contribute to realizing quick switching.

More than be described with reference to the accompanying drawings technical scheme of the present invention, consider in prior art the implementation method that the terminal network not providing concrete switches, the present invention proposes a kind of method for switching network and a kind of network switched system, mobile radio networks can be made to help terminal realization to the access operation of WLAN (wireless local area network), optimize the interoperability between mobile radio networks and WLAN (wireless local area network).

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a method for switching network, is characterized in that, comprising:

When being in the terminal in mobile radio networks and needing business to switch to WLAN (wireless local area network), the mark being used for the APN (APN) and/or IP address and described terminal of setting up service bearer for described business is informed described WLAN (wireless local area network) by described mobile radio networks, prepares to be performed corresponding resource by described WLAN (wireless local area network);

The mark of described APN and/or IP address and described terminal, by the core net node of described terminal or described mobile radio networks, is informed described WLAN (wireless local area network) by the Access Network node of described mobile radio networks;

The one or more characteristic parameter that described mobile radio networks is uploaded according to described terminal, judges whether to allow described terminal to switch to described WLAN (wireless local area network) by performing described handover operation;

If allow, then described mobile radio networks informs that described WLAN (wireless local area network) performs corresponding resource and prepares; And

Described characteristic parameter comprises dynamic parameter, and when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), described terminal sends described dynamic parameter, and wherein, described dynamic parameter comprises:

The real time status information of described terminal;

And/or the real time status information of current activating service in described terminal; And

Described characteristic parameter also comprises static parameter, in described terminal from described mobile radio networks to before the handover operation of WLAN (wireless local area network) is triggered, described terminal sends described static parameter, or when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), described terminal sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises:

Described terminal is to the support situation of described handover operation;

And/or the current activating service in described terminal is to the support situation of described handover operation.

2. method for switching network according to claim 1, is characterized in that, the step that described WLAN (wireless local area network) performs the preparation of corresponding resource comprises:

Set up IP carrying for described business and/or reserve interface-free resources.

3. method for switching network according to claim 1, is characterized in that, described mobile radio networks indicate described WLAN (wireless local area network) perform described resource prepare after, also comprise:

The switching that described terminal sends according to described mobile radio networks performs instruction, switches to described WLAN (wireless local area network), disconnects or keep being connected with the signaling between described mobile radio networks or specific service bearer to make described terminal.

4. method for switching network according to claim 1, is characterized in that, the process triggering described handover operation comprises:

Initiatively triggered step, described terminal is detecting the network switching command that specified application inputs the demand of WLAN (wireless local area network) or user, or when searching available insertion point of radio local network, initiatively triggers described handover operation;

Or passive triggered step, the Access Network node of described mobile radio networks or core net node send handover request to described terminal, make described terminal trigger described handover operation according to described handover request.

5. method for switching network according to claim 4, is characterized in that, in described passive triggered step:

Described mobile radio networks sends described handover request according to predetermined period interval to described terminal;

And/or described mobile radio networks is when detecting that the signal condition of described terminal does not meet preset signals condition, send described handover request to described terminal;

And/or described mobile radio networks detect the offered load of self be not less than first preset offered load time, send described handover request to described terminal;

And/or described WLAN (wireless local area network) is when detecting that the offered load of self is not more than the second default offered load, sends described handover request, and be forwarded to described terminal by described mobile radio networks to described mobile radio networks.

6. method for switching network according to claim 4, it is characterized in that, described terminal according to the active of all WLAN (wireless local area network) or drive sweep operation, or according to the network insertion supplementary that described mobile radio networks sends, determines one or more alternative WLAN (wireless local area network);

Described terminal, according to predetermined selection condition or the network alternative condition from the network node acquisition of specifying, determines described WLAN (wireless local area network) from described alternative WLAN (wireless local area network), and by the information reporting of described WLAN (wireless local area network) to described mobile radio networks.

7. method for switching network according to claim 6, is characterized in that, the information of described WLAN (wireless local area network) comprise following at least one or a combination set of:

The SSID of described WLAN (wireless local area network), BSSID, HESSID, channel number, clock, frequency of utilization.

8. method for switching network according to claim 1, it is characterized in that, described mobile radio networks also perform in following determining step one of at least or combination, and determine whether to allow described terminal to perform described handover operation in conjunction with the characteristic parameter of described terminal:

Judge whether described mobile radio networks and/or described WLAN (wireless local area network) meet the switching condition preset to the support situation of described handover operation;

Judge whether the real time status information of described mobile radio networks and/or described WLAN (wireless local area network) meets the switching condition preset;

Judge whether described WLAN (wireless local area network) can support the current activating service in described terminal.

9. method for switching network according to any one of claim 1 to 3, is characterized in that, also comprises:

Described mobile radio networks provides network to select assistance information and/or terminal authentication assistance information, to be realized the selection of objective network and/or the authentication and authorization to described terminal by described WLAN (wireless local area network) for described WLAN (wireless local area network).

10. method for switching network according to claim 9, is characterized in that, by the certificate server in described mobile radio networks and/or home subscriber server (HSS) for described WLAN (wireless local area network) provides described terminal authentication assistance information;

And/or provide described network to select assistance information by access network discovery and selection function unit (ANDSF).

11. method for switching network according to claim 9, is characterized in that,

Described network selects assistance information to comprise the APN of objective network, channel number, frequency and/or clock information;

Described terminal authentication assistance information comprises described mobile radio networks and carries out certification, mandate and/or signing information to described terminal.

12. 1 kinds of network switched systems, is characterized in that, the terminal comprising mobile radio networks, WLAN (wireless local area network) and be in described mobile radio networks, wherein,

Described mobile radio networks comprises:

Communication network interactive module, for when described terminal needs business to switch to described WLAN (wireless local area network), the mark described mobile radio networks being used for the APN (APN) and/or IP address and described terminal setting up service bearer for described business informs described WLAN (wireless local area network);

Described WLAN (wireless local area network) comprises:

LAN interactive module, for receiving the mark of described APN (APN) and/or IP address and described terminal;

LAN processing module, for the data received according to described LAN interactive module, performs corresponding resource and prepares;

The mark of described APN and/or IP address and described terminal is sent to the core net node of described terminal or described mobile radio networks by described communication network interactive module especially by the Access Network node of described mobile radio networks, to be forwarded to described WLAN (wireless local area network) by the core net node of described terminal or described mobile radio networks;

Described mobile radio networks also comprises:

Communication network processing module, for the one or more characteristic parameter uploaded according to described terminal, judges whether to allow described terminal to switch to described WLAN (wireless local area network) by performing described handover operation;

Wherein, described communication network interactive module is also for being permission in the judged result of described communication network processing module, the mark of described APN and/or IP address and described terminal is sent; And

Described characteristic parameter comprises dynamic parameter, then when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), described terminal sends described dynamic parameter, and wherein, described dynamic parameter comprises:

The real time status information of described terminal;

Described terminal is to the support situation of described handover operation;

13. network switched systems according to claim 12, is characterized in that, the process that described LAN processing module performs the preparation of described resource comprises:

14. network switched systems according to claim 12, it is characterized in that, described terminal comprises:

Terminal interaction module, the switching sent for receiving described mobile radio networks performs instruction;

Terminal processing module, for performing instruction according to described switching, switches to described WLAN (wireless local area network), disconnects or keep being connected with the signaling between described mobile radio networks or specific service bearer to make described terminal.

15. network switched systems according to claim 12, is characterized in that,

Described terminal is detecting the network switching command that specified application inputs the demand of WLAN (wireless local area network) or user, or when described terminal searching is to available insertion point of radio local network, initiatively triggers described handover operation;

Or the handover request that described terminal sends according to the Access Network node of described mobile radio networks or core net node, trigger described handover operation.

16. network switched systems according to claim 15, is characterized in that,

Described communication network interactive module sends described handover request according to predetermined period interval to described terminal;

And/or described communication network interactive module is when described communication network processing module detects that the signal condition of described terminal does not meet preset signals condition, sends described handover request to described terminal;

And/or described communication network interactive module is when described communication network processing module detects that the offered load of described mobile radio networks is not less than the first default offered load, sends described handover request to described terminal;

And/or described LAN interactive module is when described LAN processing module detects that the offered load of described WLAN (wireless local area network) is not more than the second default offered load, send described handover request to described mobile radio networks, and be forwarded to described terminal by described communication network interactive module.

17. network switched systems according to claim 15, it is characterized in that, described terminal according to the active of all WLAN (wireless local area network) or drive sweep operation, or according to the network insertion supplementary that described mobile radio networks sends, determines one or more alternative WLAN (wireless local area network);

18. network switched systems according to claim 17, is characterized in that, the information of described WLAN (wireless local area network) comprise following at least one or a combination set of:

19. network switched systems according to claim 12, it is characterized in that, described communication network processing module also perform in following determining step one of at least or combination, and determine whether to allow described terminal to perform described handover operation in conjunction with the characteristic parameter of described terminal:

20. according to claim 12 to the network switched system according to any one of 14, it is characterized in that, described communication network interactive module also sends network to described WLAN (wireless local area network) and selects assistance information and/or terminal authentication assistance information, to be realized the selection of objective network and/or the authentication and authorization to described terminal by described WLAN (wireless local area network).

21. network switched systems according to claim 20, it is characterized in that, described communication network interactive module sends described terminal authentication assistance information by the certificate server in described mobile radio networks and/or home subscriber server (HSS) to described WLAN (wireless local area network);

And/or described communication network interactive module sends described network selection assistance information by access network discovery and selection function unit (ANDSF).

22. network switched systems according to claim 20, is characterized in that,

23. 1 kinds of terminals, is characterized in that, comprising:

Terminal processing module, for obtaining the one or more characteristic parameter of described terminal;

Terminal interaction module, for described one or more characteristic parameter being sent to the mobile radio networks residing for described terminal, for described mobile radio networks when judging that described one or more characteristic parameter meets default access conditions, the mark of described terminal, resource ready message and APN and/or IP address is sent to WLAN (wireless local area network), make described WLAN (wireless local area network) based on described APN and/or IP address, for described terminal carries out resource preparation; And

Described characteristic parameter comprises dynamic parameter, then described terminal interaction module is when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), sends described dynamic parameter, and wherein, described dynamic parameter comprises:

The real time status information of described terminal;

Described characteristic parameter also comprises static parameter, described terminal interaction module in described terminal from described mobile radio networks to before the handover operation of WLAN (wireless local area network) is triggered, send described static parameter, or described terminal interaction module is when described terminal is triggered from described mobile radio networks to the handover operation of WLAN (wireless local area network), send described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises:

Described terminal is to the support situation of described handover operation;

24. terminals according to claim 23, is characterized in that,

25. terminals according to claim 24, is characterized in that, described terminal interaction module also for:

Receive the described handover request that described mobile radio networks sends according to predetermined period interval;

And/or receive described mobile radio networks and the described handover request that the signal condition of described terminal sends when not meeting preset signals condition detected;

And/or receive described mobile radio networks detect the offered load of self be not less than first preset offered load time the described handover request that sends;

And/or receive described WLAN (wireless local area network) detect the offered load of self be not more than second preset offered load time, through the described handover request that described mobile radio networks forwards.

26. terminals according to claim 24, it is characterized in that, described terminal according to the active of all WLAN (wireless local area network) or drive sweep operation, or according to the network insertion supplementary that described mobile radio networks sends, determines one or more alternative WLAN (wireless local area network);

Described terminal, according to predetermined selection condition or the network alternative condition from the network node acquisition of specifying, determines described WLAN (wireless local area network) from described alternative WLAN (wireless local area network), and by the information reporting of described WLAN (wireless local area network) to described mobile radio networks;

Wherein, the information of described WLAN (wireless local area network) comprise following at least one or a combination set of: the SSID of described WLAN (wireless local area network), BSSID, HESSID, channel number, clock, frequency of utilization.

27. terminals according to any one of claim 23 to 26, is characterized in that, described terminal processing module also for:

When performing described handover operation, disconnecting or keeping being connected with the signaling between described mobile radio networks or specific service bearer.