CN103428736A

CN103428736A - Network switching method, network switching system and terminal

Info

Publication number: CN103428736A
Application number: CN2013103774048A
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: 2013-12-04
Anticipated expiration: 2033-08-26
Also published as: CN103428736B

Abstract

The invention provides a network switching method. The network switching method includes the following steps that when a terminal in a wireless mobile communication network needs to switch a service to a wireless local area network, the wireless mobile communication network notifies the wireless local area network of the name of an accessing point and/or an IP address and an identification of the terminal, wherein the accessing point sets up service carrying for the service; the wireless local area network prepares corresponding resources. The invention further provides a corresponding network switching system and a terminal. According to the network switching method, the network switching system and the terminal, the terminal can have access to the wireless local network with the assistance of the wireless mobile communication network and mutual operation between the wireless mobile communication network and the wireless local area network is optimized.

Description

Method for switching network, network switched system and terminal

Technical field

The present invention relates to the 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, intelligent terminal universal, and the rise of the new industries such as Internet of Things, cloud computing, mass data transfers becomes the most significant Characteristics of Development in the current wireless communications field.In the face of mass data, attack, operator's existing network (2G/3G/LTE) can't meet current demand.

For tackling this challenge, operation both domestic and external commercial city has started construction and the layout of large-scale WIFI focus.Along with WLAN(Wireless Local Area Networks) extensive networking and the introducing of LTE technology, be badly in need of 3GPP(The3 ^RdGeneration Partnership Project) the interoperability means of network and wlan network, can bring into play shunting action in the LTE stage smoothly with the early investment that guarantees operator, and form more rational control device, increase the profitability of operator.

So-called " interoperability ", for the terminal be under the 3GPP network, wish under the assistance of 3GPP network, helps terminal to switch to wlan network, thereby optimize handoff procedure, makes and shorten switching time, improves handover success rate.And, in the current wireless communication system, the interoperability scheme of WLAN and UTRAN/GERAN is the interactive stage in low level also.That is, two separate operations of system of UTRAN/GERAN and WLAN, the security mechanism of two systems is also separated fully, and WLAN user, can the access mobile core net by just directly accessing the Internet business after the WLAN Access Network.Between WLAN and mobile network, only have simple bill information associated, that is to say, this stage WLAN and mobile network's intercommunication only is embodied in the expense that realizes simultaneously comprising in user's bill mobile network and WLAN by the BOSS system.

Introducing along with 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 freely roam operation between WLAN and LTE, the raising of experiencing with the more good utilisation of realizing operator's resource and user.

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

Summary of the invention

The present invention one of just is being based in the problems referred to above at least, a kind of new network handoff technique has been proposed, can make mobile radio networks help terminal to realize the access operation to 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, the terminal in mobile radio networks comprises: when need to switch to WLAN (wireless local area network) by business, the sign that described mobile radio networks will be used to described business to set up the APN of service bearer (APN) and/or IP address and described terminal is informed described WLAN (wireless local area network), to be carried out corresponding resource by described WLAN (wireless local area network), prepares.

In this technical scheme, mobile radio networks is that the handover operation that terminal be about to be carried out carries out the resource preparation by the signaling WLAN (wireless local area network), thereby contributes to improve handover success rate, shorten switching time.Because terminal is current in mobile radio networks, thereby mobile radio networks can learn whether terminal needs to carry out the network handover operation easily, when needs are carried out the network handover operation, can send relevant message such as terminal to mobile radio networks.Wherein, wireless mobile communications (Wireless Mobile Communication) network is the 3GPP network, such as GSM, CDMA etc.

In technique scheme, preferably, the step that described WLAN (wireless local area network) is carried out corresponding resource preparation comprises: for described business is set up the IP carrying and/or reserves interface-free resources.

In this technical scheme, after the instruction that WLAN (wireless local area network) is prepared in the resource that receives the mobile radio networks transmission, by setting up the IP carrying and/or reserving interface-free resources, the network handover operation of be about to carrying out for terminal carries out the resource preparation, so as at least one business in terminal can utilize as soon as possible WLAN (wireless local area network) ready resource switched.

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

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

In technique scheme, preferably, at described mobile radio networks, indicate described WLAN (wireless local area network) to carry out after described resource prepares, also comprise: instruction is carried out in the switching that described terminal sends according to described mobile radio networks, switch to described WLAN (wireless local area network), so that described terminal disconnection or maintenance are connected or specific service bearer with the signaling between described mobile radio networks.

In this technical scheme, mobile radio networks is carried out the handover operation to WLAN (wireless local area network) by informing terminal, thereby makes terminal can realize in time the network switching, avoids waste the time as much as possible, shorten the time of the execution network handover operation of terminal, contribute to realize quick switching.

In technique scheme, preferably, also comprise: 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 carrying out described handover operation; If allow, described mobile radio networks informs that described WLAN (wireless local area network) carries out corresponding resource and prepare.

In this technical scheme, be sent to mobile radio networks by the characteristic parameter by terminal, and can carry out the network handover operation based on these characteristic parameter judgement terminals, thereby avoid terminal can't switch in situation the problems such as kwh loss of blindly carrying out handover operation and causing.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, when the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) is triggered, 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 the current activating service in described terminal.

In this technical scheme, dynamic parameter refers to that these parameters change along with the time and may change at any time, real-time status information such as terminal, comprise position, electric weight of terminal etc., and the real-time status information of the current activating service in terminal comprises volume of transmitted data that current activating service is required etc.Preferably, terminal can be when needs be carried out the network handover operation, the above-mentioned dynamic parameter of self is informed to mobile radio networks, and these dynamic parameters are real-time parameter, contribute to mobile radio networks to judge more accurately terminal and whether can carry out the network handover operation.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, before handover operation in described terminal from from described mobile radio networks to WLAN (wireless local area network) is triggered, described terminal sends described static parameter, or when the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) is triggered, described terminal sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: the support situation of described terminal to 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 of terminal etc., be not easy to change in time, relative with above-mentioned dynamic parameter, such as whether terminal can support the interoperability between mobile radio networks and WLAN (wireless local area network), the safety of terminal to arrange etc.Dynamic parameter and static parameter can together with send, such as all sending when terminal need to be carried out the network switching, now can only by a signaling, get final product; Dynamic parameter and static parameter also can send respectively, such as need to carry out network switching in terminal before, such as after terminal is connected to mobile radio networks, just static parameter is occurred to mobile radio networks, and, when terminal need to be carried out the network switching, send dynamic parameter.

In technique scheme, preferably, the process that triggers described handover operation comprises: initiatively trigger step, described terminal is detecting specified application to the demand of WLAN (wireless local area network) or the network switching command of user's input, or, when searching available insertion point of radio local network, initiatively trigger described handover operation; Or passive triggering 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 is the trigger network handover operation initiatively, to meet the demand of self; Terminal also can passive trigger network handover operation, thereby 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 triggering step: described mobile radio networks sends described handover request according to the predetermined period interval to described terminal; And/or described mobile radio networks signal condition that described terminal detected sends described handover request to described terminal while not meeting the preset signals condition; And/or the described mobile radio networks offered load that detects self sends described handover request to described terminal while being greater than or not less than the first default offered load; And/or described WLAN (wireless local area network) sends described handover request to described mobile radio networks, and is forwarded to described terminal by described mobile radio networks when the offered load that detects self is less than or is not more than the second default offered load.

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

In technique scheme, preferably, described terminal is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary sent according to described mobile radio networks, determines one or more alternative WLAN (wireless local area network); Described terminal, according to default alternative condition or from the network alternative condition that the network node of appointment obtains, is determined 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 be scanned WLAN (wireless local area network) voluntarily, to find the AP that can access; On the other hand, mobile radio networks can provide the network insertion supplementary to terminal, such as the channel of the AP list of suggestion access, the AP list of not advising access, suggestion scanning etc., thereby contributes to the scanning process of increasing terminal.After the end of scan, for the one or more AP that obtain, terminal can be according to the signal strength signal intensity of these AP, network transfer speeds, channel of living in etc. situation, and the network alternative condition based on prior setting is selected, to determine the final AP that switch and access that needs.

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 carry out in following determining step one of at least or combination, and determine whether to allow described terminal to carry out 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 default switching condition to the support situation of described handover operation; Whether the real-time status information that judges described mobile radio networks and/or described WLAN (wireless local area network) meets default switching condition; Judge whether described WLAN (wireless local area network) can support the current activating service in described terminal.

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

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

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

In technique scheme, preferably, (AAA) server of the authentication in described mobile radio networks and/or home subscriber (HSS) server provide described terminal authentication assistance information for described WLAN (wireless local area network); 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 APN, channel number, frequency and/or the clock information of objective network; Described terminal authentication assistance information comprises that described mobile radio networks is authenticated, authorizes and/or signing information described terminal.

The invention allows for a kind of network switched system, comprise mobile radio networks, WLAN (wireless local area network) and the terminal in described mobile radio networks, wherein, described mobile radio networks comprises: the communication network interactive module, for when described terminal need to switch to described WLAN (wireless local area network) by business, the sign that is used to described business to set up the APN of service bearer (APN) and/or IP address and described terminal described mobile radio networks is informed described WLAN (wireless local area network); Described WLAN (wireless local area network) comprises: the LAN interactive module, for receiving the sign of described APN (APN) and/or IP address and described terminal; The LAN processing module, for the data that receive according to described LAN interactive module, carry out corresponding resource and prepare.

In technique scheme, preferably, the process that described LAN processing module is carried out described resource preparation comprises: for described business is set up the IP carrying and/or reserves interface-free resources.

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

In technique scheme, preferably, described terminal comprises: terminal interaction module, the switching execution instruction sent for receiving described mobile radio networks; Terminal processing module, for according to described switching, carrying out instruction, switch to described WLAN (wireless local area network), so that described terminal disconnection or maintenance are connected or specific service bearer with the signaling between described mobile radio networks.

In technique scheme, preferably, described mobile radio networks also comprises: the communication network processing module, for the one or more characteristic parameter of uploading according to described terminal, judges whether to allow described terminal to switch to described WLAN (wireless local area network) by carrying out described handover operation; Wherein, described communication network interactive module also in the situation that judgment result is that permission of described communication network processing module, sends the sign of described APN and/or IP address and described terminal.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, 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 the current activating service in described terminal.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, before handover operation in described terminal from from described mobile radio networks to WLAN (wireless local area network) is triggered, described terminal sends described static parameter, or in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, described terminal sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: the support situation of described terminal to 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 is detecting specified application to the demand of WLAN (wireless local area network) or the network switching command of user's input, or, when described terminal searching arrives available insertion point of radio local network, initiatively triggers described handover operation; Or described terminal triggers described handover operation according to the Access Network node of described mobile radio networks or the handover request of core net node transmission.

In technique scheme, preferably, described communication network interactive module sends described handover request according to the predetermined period interval to described terminal; And/or the described communication network interactive module signal condition that described terminal detected in described communication network processing module sends described handover request to described terminal while not meeting the preset signals condition; And/or the described communication network interactive module offered load that described mobile radio networks detected in described communication network processing module sends described handover request to described terminal while being greater than or not less than the first default offered load; And/or the described LAN interactive module offered load that described WLAN (wireless local area network) detected in described LAN processing module is while being less than or being 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 carry out in following determining step one of at least or combination, and determine whether to allow described terminal to carry out 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 default switching condition to the support situation of described handover operation; Whether the real-time status information that judges described mobile radio networks and/or described WLAN (wireless local area network) meets default switching condition; 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 by described WLAN (wireless local area network) to the selection of objective network and/or to the authentication and authorization of described terminal.

In technique scheme, preferably, described communication network interactive module sends described terminal authentication assistance information by (AAA) server of the authentication 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, having comprised: terminal processing module, for obtaining the one or more characteristic parameter of described terminal; The terminal interaction module, for described one or more characteristic parameter is sent to the residing mobile radio networks of described terminal, for described mobile radio networks when judging that described one or more characteristic parameter meets default access conditions, send sign, resource ready message and APN and/or the IP address of described terminal to WLAN (wireless local area network), make described WLAN (wireless local area network) based on described APN and/or IP address, for described terminal is carried out the resource preparation.

Wherein, be sent to mobile radio networks by the characteristic parameter by terminal, and can carry out the network handover operation based on these characteristic parameter judgement terminals, thereby avoid terminal can't switch in situation the problems such as kwh loss of blindly carrying out handover operation and causing.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, described terminal interaction module in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, 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 the current activating service in described terminal.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, described terminal interaction module is before in described terminal, the handover operation from described mobile radio networks to WLAN (wireless local area network) is triggered, send described static parameter, or described terminal interaction module in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, send described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: the support situation of described terminal to 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 the predetermined period interval; And/or receive the described handover request sent when signal condition that described mobile radio networks detects described terminal does not meet the preset signals condition; And/or receive the described handover request that described mobile radio networks sends when the offered load that detects self is greater than or not less than the first default offered load; And/or when receiving offered load that described WLAN (wireless local area network) detects self and being less than or being not more than the second default offered load, the described handover request forwarded through described mobile radio networks.

In technique scheme, preferably, described terminal processing module also for: when carrying out described handover operation, disconnection or maintenance are connected with signaling between described mobile radio networks or specific service bearer.

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

The 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 is according to an embodiment of the invention carried out the idiographic flow of network switching schematic diagram from 3GPP to WLAN from;

Fig. 5 A and Fig. 5 B show terminal according to an embodiment of the invention and carry out 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 more clearly to 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, in the situation that do not conflict, the application's embodiment and the feature in embodiment can combine mutually.

A lot of details have been set forth 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 subject to 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 the terminal in mobile radio networks need to switch to WLAN (wireless local area network) by business, the sign that described mobile radio networks will be used to described business to set up the APN of service bearer (APN) and/or IP address and described terminal is informed described WLAN (wireless local area network), to be carried out corresponding resource by described WLAN (wireless local area network), prepares.

In technique scheme, preferably, at described mobile radio networks, indicate the WLAN (wireless local area network) of described appointment to carry out after described resource prepares, also comprise: instruction is carried out in the switching that described terminal sends according to described mobile radio networks, switch to described WLAN (wireless local area network), so that described terminal disconnection or maintenance are connected or specific service bearer with the signaling between described mobile radio networks.

In technique scheme, preferably, described mobile radio networks also carry out in following determining step one of at least or combination, and determine whether to allow described terminal to carry out described handover operation in conjunction with the characteristic parameter of described terminal: whether the WLAN (wireless local area network) that judges described mobile radio networks and/or described appointment meets default switching condition to the support situation of described handover operation; Whether the real-time status information that judges described mobile radio networks and/or described WLAN (wireless local area network) meets default switching condition; 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, the 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 in described mobile radio networks 202, wherein, described mobile radio networks 202 comprises: communication network interactive module 202A, for when described terminal 206 need to switch to described WLAN (wireless local area network) 204 by business, the sign that is used to described business to set up the APN of service bearer (APN) and/or IP address and described terminal described mobile radio networks 202 is informed described WLAN (wireless local area network) 204, described WLAN (wireless local area network) 204 comprises: LAN interactive module 204A, for receiving the sign of described APN (APN) and/or IP address and described terminal, LAN processing module 204B, for the data that receive according to described LAN interactive module 204A, carry out corresponding resource and prepare.

In this technical scheme, mobile radio networks 202 is that the handover operation that terminal 206 is about to carry out carries out the resource preparation by the signaling WLAN (wireless local area network), thereby contributes to improve handover success rate, shorten switching time.Because terminal 206 is current in mobile radio networks 202, thereby mobile radio networks 202 can learn whether terminal 206 needs to carry out the network handover operation easily, when needs are carried out the network handover operation, can send relevant message such as terminal 206 to mobile radio networks 202.Wherein, wireless mobile communications (Wireless Mobile Communication) network is the 3GPP network, such as GSM, CDMA etc.

In technique scheme, preferably, the process that described LAN processing module 204B carries out described resource preparation comprises: for described business is set up the IP carrying and/or reserves interface-free resources.

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

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

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

In technique scheme, preferably, described terminal 206 comprises: terminal interaction module 206A, the switching execution instruction sent for receiving described mobile radio networks 202; Terminal processing module 206B, for according to described switching, carrying out instruction, switch to described WLAN (wireless local area network) 204, so that 206 disconnections of described terminal or maintenance are connected or specific service bearer with the signaling between described mobile radio networks 202.

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

In technique scheme, preferably, described mobile radio networks 202 also comprises: communication network processing module 202B, one or more characteristic parameter for uploading according to described terminal 206, judge whether to allow described terminal 206 to switch to described WLAN (wireless local area network) 204 by carrying out described handover operation; Wherein, described communication network interactive module 202A also in the situation that judgment result is that permission of described communication network processing module 202B, sends the sign of described APN and/or IP address and described terminal.

In this technical scheme, be sent to mobile radio networks 202 by the characteristic parameter by terminal 206, and can carry out the network handover operation based on these characteristic parameter judgement terminals 206, thereby avoid terminal 206 can't switch in situation the problems such as kwh loss of blindly carrying out handover operation and causing.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, in the situation that the handover operation of described terminal 206 from described mobile radio networks 202 to WLAN (wireless local area network) be triggered, 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 the current activating service in described terminal 206.

In this technical scheme, dynamic parameter refers to that these parameters change along with the time and may change at any time, real-time status information such as terminal 206, comprise position, electric weight of terminal 206 etc., and the real-time status information of the current activating service in terminal 206 comprises volume of transmitted data that current activating service is required etc.Preferably, terminal 206 can be when needs be carried out the network handover operation, the above-mentioned dynamic parameter of self is informed to mobile radio networks 202, these dynamic parameters are real-time parameter, contribute to mobile radio networks 202 to judge more accurately terminal 206 and whether can carry out the network handover operation.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, before handover operation in described terminal 206 from from described mobile radio networks 202 to WLAN (wireless local area network) is triggered, described terminal 206 sends described static parameter, or in the situation that the handover operation of described terminal 206 from described mobile radio networks 202 to WLAN (wireless local area network) be triggered, described terminal 206 sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: the support situation of 206 pairs of described handover operations of described terminal; 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 of terminal 206 etc., be not easy to change in time, relative with above-mentioned dynamic parameter, such as whether terminal 206 can support the interoperability between mobile radio networks 202 and WLAN (wireless local area network), the safety of terminal 206 to arrange etc.Dynamic parameter and static parameter can together with send, such as all sending when terminal 206 needs to carry out the networks switching, now can only by a signaling, get final product; Dynamic parameter and static parameter also can send respectively, before in terminal 206, needing to carry out the network switching, such as after 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 carry out the network switching, send dynamic parameter.

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

In this technical scheme, terminal 206 is the trigger network handover operation initiatively, to meet the demand of self; Terminal 206 also can passive trigger network handover operation, thereby 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 the predetermined period interval to described terminal 206; And/or the described communication network interactive module 202A signal condition that described terminal 206 detected at described communication network processing module 202B sends described handover request to described terminal 206 while not meeting the preset signals condition; And/or the described communication network interactive module 202A offered load that described mobile radio networks 202 detected at described communication network processing module 202B sends described handover request to described terminal 206 while being greater than or not less than the first default offered load; And/or the described LAN interactive module 204A offered load that described WLAN (wireless local area network) 204 detected at described LAN processing module 204B is while being less than or being 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 is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary sent according to described mobile radio networks 202, determines one or more alternative WLAN (wireless local area network); Described terminal 206 is according to default alternative condition or the network alternative condition that obtains from the network node of appointment, determine described WLAN (wireless local area network) 204 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 be scanned WLAN (wireless local area network) voluntarily, to find the AP that can access; On the other hand, mobile radio networks 202 can provide the network insertion supplementary to terminal 206, such as the channel of the AP list of suggestion access, the AP list of not advising access, suggestion scanning etc., thereby contributes to the scanning process of increasing terminal 206.After the end of scan, for the one or more AP that obtain, terminal 206 can be according to the signal strength signal intensity of these AP, network transfer speeds, channel of living in etc. situation, and the network alternative condition based on prior setting is selected, to determine the final AP that switch and access that needs.

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 carry out in following determining step one of at least or combination, and determine whether to allow described terminal 206 to carry out described handover operation in conjunction with the characteristic parameter of described terminal 206: whether the support situation that judges described mobile radio networks 202 and/or 204 pairs of described handover operations of described WLAN (wireless local area network) meets default switching condition; Whether the real-time status information that judges described mobile radio networks 202 and/or described WLAN (wireless local area network) 204 meets default switching condition; Judge the current activating service whether described WLAN (wireless local area network) 204 can be supported in described terminal 206.

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

In technique scheme, preferably, described communication network interactive module 202A also sends networks 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 to the selection of objective network and/or to the authentication and authorization of described terminal 206.

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

In technique scheme, preferably, described communication network interactive module 202A sends described terminal authentication assistance information by authentication (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 APN, channel number, frequency and/or the clock information of objective network; Described terminal authentication assistance information comprises that 202 pairs of described terminals 206 of described mobile radio networks are authenticated, authorize and/or signing information.

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, mainly can be divided into three phases, i.e. step 302: the handover trigger stage according to an embodiment of the invention; Step 304: handover evaluation stage; Step 306: handover execution stage.

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

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

As shown in Figure 4, show terminal according to an embodiment of the invention and carry out the idiographic flow that network switches from 3GPP to WLAN, comprising:

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

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

The user triggers

● the handover request triggered due to certain demand of user (as, upper layer application or the subjective demand of user).

● user terminal is independently found available wlan network the handover request triggered.

Network-triggered

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

● because moving the 3GPP network signal caused, the user worsens the handover request of triggering.Certain threshold T is set ₁, the signal quality received from the 3GPP network as the user is or/and intensity during lower than this threshold value, triggers switching.

● because the 3GPP offered load is overweight, the switching flow based on load balancing triggered by the 3GPP network side.The reference information provided according to " offered load state " arranges a threshold value L _3GPP, as the actual loading L of 3GPP network>and L _3GPPThe time, trigger switching.

Due to the wlan network underload, the handover request of triggering.The reference information provided according to " offered load state " arranges a threshold value L _WLAN, as the actual loading L<L of wlan network _WLANThe time, trigger switching.Wlan network by and the 3GPP network between interface (as the STa/STb/STc interface linked with aaa server) notice 3GPP core net, and have the 3GPP network to initiate switching.

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

In fact this step has implied the discovery procedure for alternative network:

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

(2) terminal is its network insertion supplementary provided according to the 3GPP network, such as the channel of the list of the AP of suggestion access, the list of not advising the AP of access, suggestion scanning, do not advise the channel of scanning etc., more prepare, carry out rapidly, targetedly the scanning to objective network.Certainly, the 3GPP network also may directly by certain, definite AP informs terminal, determines by terminal that it can connect and gets final product.

Step 406A, step 406B and step 408 divide the handover evaluation stage shown in Fig. 3 further for three steps, wherein:

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

● wlan network " offered load state " is confirmed.Determine according to " the offered load state " of wlan network whether wlan network allows switching.

● wlan network " network admittance state " is confirmed.Determine whether to allow to carry out switching according to " the network admittance state " of wlan network.

The 3GPP network can obtain WLAN's " offered load state " and " network admittance state " information in the following manner:

-obtain above-mentioned state information by wlan network and the internetwork standard interface of 3GPP (as the STa/STb/STc interface 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 " confirmation.According to the active user or/and " user's access grade " of current service switchover or/and " service access grade " judges whether current switching behavior allows to occur.

Step 406B, the switching capability assessment.The switching capability assessment comprises the following one or more ability that whether possesses switching of assessment:

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

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

● " user contract authority " confirms.Whether the user who grasps according to network " user contract authority " validation of information user allows interoperability; 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 " confirmed.Whether " ability of user terminal " validation of information user terminal of grasping according to network possesses interoperability; Or/and whether chant the wadding interoperability for certain specific type of service; Or/and support interoperability (single connection is or/and multi-link (the WLAN version of single-connection and/or multi-connection, support is as 802.11a/b/g/n)) and the parameter of which kind of mode.

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

● when " type of service " of the current activating service of user can't be obtained support at objective network (wlan network) (as CS territory business), forbid switching; Otherwise, allow switching (entering step 410).

● " the quality of service grade QoS " of the current activating service of user can't be obtained while meeting at objective network (wlan network), forbids switching; Otherwise, allow switching.

If ● allow switching, need to carry out the 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 the 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 the 3GPP network mapping to wlan network.

Step 410 to step 418 divides the handover execution stage shown in Fig. 3 further for five steps, wherein:

Step 410, enter handover execution stage.

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

Step 414, authentication (Authentication) and mandate (authorization).The user is synchronous and be connected to wlan system, carries out the authentication and authorization process.This step completes the information sharing based on associating aaa server and HSS server.

Step 416, the wlan network resource is prepared.In this step, 3GPP network indication wlan network is set up and is carried according to the qos requirement obtained in " handoff scenario assessment and decision-making " or service access grade for the business that is about to the switching arrival.After this step completes, the 3GPP network will stop transmitting data to the user.

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

Resource based on Access Network is prepared.At first the Access Network node by the 3GPP network sends related signaling or message, and the 3GPP module in terminal receives; Then, the WLAN module, by the internal interface/signaling of 3GPP module in terminal and WLAN module, is obtained above-mentioned signaling or message; Finally, the notice of the WLAN module in terminal wlan network side is set up the IP carrying for being about to the next business of switching.

Resource based on core net is prepared.At first, the Access Network node notice core net node of 3GPP network, then by the interface between 3GPP and wlan system webmaster/control system, by webmaster or the control system of 3GPP core net notice wlan network, request WLAN sets up the IP carrying and/or reserves interface-free resources for being about to switch the business of coming in wlan network.

Step 418, UE(User Equipment, subscriber equipment, i.e. terminal) connect and switch.In this step, 3GPP network notification terminal is carried out the handover operation to wlan network, specifically comprises:

" core net is to the 3GPP base station ".In this process, notify 3GPP Access Network node (as base station) by 3GPP core net node: terminal can be carried out handover operation to WLAN.

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

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

So far, each step in Fig. 4 has been described the entire flow that terminal is switched to wlan network by the 3GPP network.

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 operation comprises:

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

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

The Access Network node of 3GPP network (as eNB, i.e. base station) or core net node (as MME, Mobile Management Entity, mobile management entity) generate switching assistance messages frame, and switching assistance messages frame at least comprises the network insertion supplementary.

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

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

The real-time status information of terminal;

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

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

The support situation of terminal to handover operation;

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

Concrete signalling comprises multiple situation:

(1) in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, 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 the RRC signaling, such as UE capability transmission (UE capability transfer) signaling, and described characteristic parameter is arranged in user equipment network performance (the UE network capability) information element of described RRC signaling.Certainly, also can adopt the reservation position in other information elements in this signaling, or existing information element is expanded to the one or more positions that obtain.

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

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

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

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

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

Step 3, can Access Network node judgement terminal carry out the network handover operation.

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 characteristic parameter separately, such as:

● " service feature "

" service feature " of the present invention's definition, the characteristic information at line service while referring to initiate switching 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 the type of service characteristics 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, by operator according to the operation policy development, be described the priority level of certain specific transactions access objective network.

● " network characterization "

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

-network interoperability ability: the interoperability that feeling the pulse with the finger-tip mark network and switching initiation network possess is or/and the interoperability that a certain specific transactions is possessed.

-network admittance state: whether feeling the pulse with the finger-tip mark network is current allows the 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 that means the physical resource that current time WLAN AP and 3GPP base station are current.

-hardware device utilance: the utilization rate that means current time WLAN AP and the hardware devices such as 3GPP base station CUP, buffering.

-excited user number: mean excited user number in current time WLAN AP and 3GPP community.

-community (stream) amount of handling up: the throughput total amount that means current time WLAN AP and 3GPP base station.

● " terminal feature "

" terminal feature " refers to terminal at WLAN or/and the ability information of the signing characteristic information of the user of 3GPP network and terminal comprises with next class or multiclass information:

-user access grade: operator for the user at access WLAN or/and the access priority information defined during 3GPP.

-user the authority of contracting: when operator carries out WLAN and 3GPP interoperability for the user, the interoperability authority of definition.

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

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

Wherein, for the required terminal feature parameter of using in the assessment of the switching capability carried out in step 406B etc., can utilize RRC signaling existing or new definition to be transmitted:

-utilize " UE network capability " (terminal network ability) IE of " Attach request " (additional request frame) to transmit relevant ability.Concrete, utilize the reserved byte of this IE, adopt the mode transmission capacity information of bitmap, as whether the bit of the joint of the Eight characters by this IE (octet) UE that serves as a mark supports the switching capability of WLAN and the sign of supporting which kind of handover operation.

-utilizing existing RRC " UE capability transfer " (terminal capability transmission) signaling, the newly-increased relevant parameter I E of WLAN in this signaling, as " UE-interRAT-ParametersWlan " IE.

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

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

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

Step 3a(is not shown), can core net node judgement terminal carry out handover operation.

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

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

In another kind of situation, the information that includes the alternative objective network that a plurality of terminals detect in network information message frame, for the 3GPP network, be that terminal is selected an objective network for access, in this case, in fact also need to be selected by the 3GPP network, and selection result is returned to the terminal (not shown).

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

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

It can, for S1 signaling that had or new definition, can be also the dedicated signaling of other new definition that resource is prepared message frame.Such as handover request frame (Handover Required), may need information and the method for transmission as follows:

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

-base station can pass to objective network by objective network sign (/HESSID/BSSID) by " TargetID " IE in " Handover Required " message.

The information such as UE ability, address can be transmitted to wlan network in-base station by " Source-ToTarget-TransparentContainer " in " Handover Required " message.

-base station can point out that by " Cause " in " Handover Required " message this switching belongs to the interoperability of WLAN.

Step 7, the core net node sends the first Indication message frame to the Access Network node, is used to indicate: terminal can have been carried out to the handover operation of wlan network, has now entered handover execution stage.

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

-MME sends message " Handover command " to the 3GPP base station, and inform base station by the value " ltetowlan " of new definition in " HandoverType " IE in " Handover command " message, this time switching is the interoperability process with wlan system.

-can also transmit the required necessary information of access wlan network as APN((Access Point Name, APN by " Target to Source Transparent Container " in " Handover command ") or the IP address.

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

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

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

-also can, the 3GPP base station sends message " MobilityFromEUTRACommand " to the user, completes the transmission of information needed by the mode of the expansion of the signaling element to existing " mobilityFromEUTRACommand-r8 " or " mobilityFromEUTRACommand-r9 ".

May need information and the method for transmission as follows:

-to indicate this operation by the value " wlan " of the new definition of " targetRAT-Type " IE be the interoperability with wlan system.

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

Step 9, terminal is carried out the handover operation to wlan network.

Step 10, the Access Network node sends the 3rd Indication message frame to terminal, and the signaling with the 3GPP network is connected and is processed to it to be used to indicate terminal, comprises and continues reservation or interrupt this signaling connection.

The 3rd Indication message frame can be RRC signaling 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, need to not realize on the basis of step 9.

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

Above based on Fig. 5 A and step 1-10, specifically described the process that terminal is carried out the network handover operation; And Fig. 5 B has described similar process equally, but there are some differences with Fig. 5 A:

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

Above-mentioned steps, corresponding to the step 5a-6a shown in Fig. 5 A, is actually the different send modes of resource being prepared to message frame.Particularly, the Access Network node prepares by resource the 3GPP network communication module that message frame is sent to terminal, then internal interface/the signaling based on by 3GPP network communication module in terminal and wlan network communication module, the wlan network communication module is obtained this resource and is prepared 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, Home Location Register, attaching position register; Or HSS, Home Subscriber Server, home subscriber server), and aaa server, also have not shown access network discovery and selection function unit (ANDSF).In the 3GPP network, above-mentioned server is mainly used in the authentication and authorization in the terminal access procedure.

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

Send described terminal authentication assistance information by aaa server and/or HSS/HLR to wlan network;

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 is sent to the residing mobile radio networks of described terminal 600, for described mobile radio networks when judging that described one or more characteristic parameter meets default access conditions, send sign, resource ready message and APN and/or the IP address of described terminal 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 is carried out the resource preparation.

In this technical scheme, mobile radio networks is that the handover operation that terminal 600 is about to carry out carries out the resource preparation by the signaling WLAN (wireless local area network), thereby contributes to improve handover success rate, shorten switching time.Because terminal 600 is current in mobile radio networks, thereby mobile radio networks can learn whether terminal 600 needs to carry out the network handover operation easily, when needs are carried out the network handover operation, can send relevant message such as terminal 600 to mobile radio networks.Wherein, wireless mobile communications (Wireless Mobile Communication) network is the 3GPP network, such as GSM, CDMA etc.

Wherein, be sent to mobile radio networks by the characteristic parameter by terminal 600, and can carry out the network handover operation based on these characteristic parameter judgement terminals 600, thereby avoid terminal 600 can't switch in situation the problems such as kwh loss of blindly carrying out handover operation and causing.

In technique scheme, preferably, described characteristic parameter comprises dynamic parameter, terminal interaction module 604 in the situation that the handover operation of described terminal 600 from described mobile radio networks to WLAN (wireless local area network) be triggered, 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 the current activating service in described terminal 600.

In this technical scheme, dynamic parameter refers to that these parameters change along with the time and may change at any time, real-time status information such as terminal 600, comprise position, electric weight of terminal 600 etc., and the real-time status information of the current activating service in terminal 600 comprises volume of transmitted data that current activating service is required etc.Preferably, terminal 600 can be when needs be carried out the network handover operation, the above-mentioned dynamic parameter of self is informed to mobile radio networks, and these dynamic parameters are real-time parameter, contribute to mobile radio networks to judge more accurately terminal 600 and whether can carry out the network handover operation.

In technique scheme, preferably, described characteristic parameter also comprises static parameter, terminal interaction module 604 is before the handover operation of described terminal 600 from described mobile radio networks to WLAN (wireless local area network) is triggered, send described static parameter, or terminal interaction module 604 in the situation that the handover operation of described terminal 600 from described mobile radio networks to WLAN (wireless local area network) be triggered, send described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises: the support situation of 600 pairs of described handover operations of described terminal; 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 of terminal 600 etc., be not easy to change in time, relative with above-mentioned dynamic parameter, such as whether terminal 600 can support the interoperability between mobile radio networks and WLAN (wireless local area network), the safety of terminal 600 to arrange etc.Dynamic parameter and static parameter can together with send, such as all sending when terminal 600 needs to carry out the networks switching, now can only by a signaling, get final product; Dynamic parameter and static parameter also can send respectively, before in terminal 600, needing to carry out the network switching, such as after terminal 600 is connected to mobile radio networks, just static parameter is occurred to mobile radio networks, and, when terminal 600 needs to carry out the network switching, send dynamic parameter.

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

In this technical scheme, terminal 600 is the trigger network handover operation initiatively, to meet the demand of self; Terminal 600 also can passive trigger network handover operation, thereby 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 the predetermined period interval; And/or receive the described handover request sent when signal condition that described mobile radio networks detects described terminal 600 does not meet the preset signals condition; And/or receive the described handover request that described mobile radio networks sends when the offered load that detects self is greater than or not less than the first default offered load; And/or when receiving offered load that described WLAN (wireless local area network) detects self and being less than or being not more than the second default offered load, the described handover request forwarded through described mobile radio networks.

In technique scheme, preferably, described terminal 600 is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary sent according to described mobile radio networks, determines one or more alternative WLAN (wireless local area network); Described terminal 600, according to default alternative condition or from the network alternative condition that the network node of appointment obtains, is determined 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 be scanned WLAN (wireless local area network) voluntarily, to find the AP that can access; On the other hand, mobile radio networks can provide the network insertion supplementary to terminal 600, such as the channel of the AP list of suggestion access, the AP list of not advising access, suggestion scanning etc., thereby contributes to the scanning process of increasing terminal 600.After the end of scan, for the one or more AP that obtain, terminal 600 can be according to the signal strength signal intensity of these AP, network transfer speeds, channel of living in etc. situation, and the network alternative condition based on prior setting is selected, to determine the final AP that switch and access that needs.

In technique scheme, preferably, described terminal processing module 602 also for: when carrying out described handover operation, disconnection or maintenance are connected with signaling between described mobile radio networks or specific service bearer.

In this technical scheme, mobile radio networks is by the handover operation of informing that terminal 600 is carried out to WLAN (wireless local area network), thereby make terminal 600 can realize in time the network switching, avoid waste the time as much as possible, shorten the time of the execution network handover operation of terminal 600, contribute to realize 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 of the terminal network switching that does not provide concrete, the present invention proposes a kind of method for switching network and a kind of network switched system, can make mobile radio networks help terminal to realize the access operation to 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 modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

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

When the terminal in mobile radio networks need to switch to WLAN (wireless local area network) by business, the sign that described mobile radio networks will be used to described business to set up the APN of service bearer (APN) and/or IP address and described terminal is informed described WLAN (wireless local area network), to be carried out corresponding resource by described WLAN (wireless local area network), prepares.

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

For described business is set up the IP carrying and/or reserves interface-free resources.

3. method for switching network according to claim 1, it is characterized in that, the Access Network node of described mobile radio networks, by the core net node of described terminal or described mobile radio networks, is informed described WLAN (wireless local area network) by the sign of described APN and/or IP address and described terminal.

4. method for switching network according to claim 1, is characterized in that, at described mobile radio networks, indicates described WLAN (wireless local area network) to carry out after described resource prepares, and also comprises:

Instruction is carried out in the switching that described terminal sends according to described mobile radio networks, switches to described WLAN (wireless local area network), so that described terminal disconnection or maintenance are connected or specific service bearer with the signaling between described mobile radio networks.

5. according to the described method for switching network of any one in claim 1 to 4, it is characterized in that, also comprise:

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

If allow, described mobile radio networks informs that described WLAN (wireless local area network) carries out corresponding resource and prepare.

6. method for switching network according to claim 5, it is characterized in that, described characteristic parameter comprises dynamic parameter, when the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) is triggered, 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 the current activating service in described terminal.

7. method for switching network according to claim 6, it is characterized in that, described characteristic parameter also comprises static parameter, before handover operation in described terminal from from described mobile radio networks to WLAN (wireless local area network) is triggered, described terminal sends described static parameter, or, when the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) is triggered, described terminal sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises:

The support situation of described terminal to described handover operation;

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

8. method for switching network according to claim 6, is characterized in that, the process that triggers described handover operation comprises:

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

Or passive triggering 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.

9. method for switching network according to claim 8, is characterized in that, in described passive triggering step:

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

And/or described mobile radio networks signal condition that described terminal detected sends described handover request to described terminal while not meeting the preset signals condition;

And/or the described mobile radio networks offered load that detects self sends described handover request to described terminal while being greater than or not less than the first default offered load;

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

10. method for switching network according to claim 8, it is characterized in that, described terminal is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary sent according to described mobile radio networks, determines one or more alternative WLAN (wireless local area network);

Described terminal, according to default alternative condition or from the network alternative condition that the network node of appointment obtains, is determined 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.

11. method for switching network according to claim 10, 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.

12. method for switching network according to claim 5, it is characterized in that, described mobile radio networks also carry out in following determining step one of at least or combination, and determine whether to allow described terminal to carry out 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 default switching condition to the support situation of described handover operation;

Whether the real-time status information that judges described mobile radio networks and/or described WLAN (wireless local area network) meets default switching condition;

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

13. according to the described method for switching network of any one in claim 1 to 4, it is characterized in that, also comprise:

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

14. method for switching network according to claim 13, is characterized in that, (AAA) server of the authentication in described mobile radio networks and/or home subscriber (HSS) server provide described terminal authentication assistance information for described WLAN (wireless local area network);

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

15. method for switching network according to claim 13, is characterized in that,

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

Described terminal authentication assistance information comprises that described mobile radio networks is authenticated, authorizes and/or signing information described terminal.

16. a network switched system, is characterized in that, comprises mobile radio networks, WLAN (wireless local area network) and the terminal in described mobile radio networks, wherein,

Described mobile radio networks comprises:

The communication network interactive module, for when described terminal need to switch to described WLAN (wireless local area network) by business, the sign that is used to described business to set up the APN of service bearer (APN) and/or IP address and described terminal described mobile radio networks is informed described WLAN (wireless local area network);

Described WLAN (wireless local area network) comprises:

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

The LAN processing module, for the data that receive according to described LAN interactive module, carry out corresponding resource and prepare.

17. network switched system according to claim 16, is characterized in that, the process that described LAN processing module is carried out described resource preparation comprises:

18. network switched system according to claim 16, it is characterized in that, described communication network interactive module specifically is sent to the sign of described APN and/or IP address and described terminal the core net node of described terminal or described mobile radio networks by the Access Network node of described mobile radio networks, with the core net node by described terminal or described mobile radio networks, is forwarded to described WLAN (wireless local area network).

19. network switched system according to claim 16, is characterized in that, described terminal comprises:

The terminal interaction module, the switching execution instruction sent for receiving described mobile radio networks;

Terminal processing module, for according to described switching, carrying out instruction, switch to described WLAN (wireless local area network), so that described terminal disconnection or maintenance are connected or specific service bearer with the signaling between described mobile radio networks.

20. according to claim 16 to the described network switched system of any one in 19, it is characterized in that, described mobile radio networks also comprises:

The communication network processing module, for the one or more characteristic parameter of uploading according to described terminal, judge whether to allow described terminal to switch to described WLAN (wireless local area network) by carrying out described handover operation;

Wherein, described communication network interactive module also in the situation that judgment result is that permission of described communication network processing module, sends the sign of described APN and/or IP address and described terminal.

21. network switched system according to claim 20, it is characterized in that, described characteristic parameter comprises dynamic parameter, in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, described terminal sends described dynamic parameter, wherein, described dynamic parameter comprises:

The real-time status information of described terminal;

22. network switched system according to claim 21, it is characterized in that, described characteristic parameter also comprises static parameter, before handover operation in described terminal from from described mobile radio networks to WLAN (wireless local area network) is triggered, described terminal sends described static parameter, or in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, described terminal sends described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises:

The support situation of described terminal to described handover operation;

23. network switched system according to claim 21, is characterized in that,

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

Or described terminal triggers described handover operation according to the Access Network node of described mobile radio networks or the handover request of core net node transmission.

24. network switched system according to claim 23, is characterized in that,

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

And/or the described communication network interactive module signal condition that described terminal detected in described communication network processing module sends described handover request to described terminal while not meeting the preset signals condition;

And/or the described communication network interactive module offered load that described mobile radio networks detected in described communication network processing module sends described handover request to described terminal while being greater than or not less than the first default offered load;

And/or the described LAN interactive module offered load that described WLAN (wireless local area network) detected in described LAN processing module is while being less than or being 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.

25. network switched system according to claim 23, it is characterized in that, described terminal is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary sent according to described mobile radio networks, determines one or more alternative WLAN (wireless local area network);

26. network switched system according to claim 25, is characterized in that, the information of described WLAN (wireless local area network) comprise following at least one or a combination set of:

27. network switched system according to claim 20, it is characterized in that, described communication network processing module also carry out in following determining step one of at least or combination, and determine whether to allow described terminal to carry out described handover operation in conjunction with the characteristic parameter of described terminal:

28. according to claim 16 to the described network switched system of any one in 19, 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 by described WLAN (wireless local area network) to the selection of objective network and/or to the authentication and authorization of described terminal.

29. network switched system according to claim 28, it is characterized in that, described communication network interactive module sends described terminal authentication assistance information by (AAA) server of the authentication 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).

30. network switched system according to claim 28, is characterized in that,

31. a terminal, is characterized in that, comprising:

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

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

32. terminal according to claim 31, it is characterized in that, described characteristic parameter comprises dynamic parameter, described terminal interaction module in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, send described dynamic parameter, wherein, described dynamic parameter comprises:

The real-time status information of described terminal;

33. terminal according to claim 32, it is characterized in that, described characteristic parameter also comprises static parameter, described terminal interaction module is before in described terminal, the handover operation from described mobile radio networks to WLAN (wireless local area network) is triggered, send described static parameter, or described terminal interaction module in the situation that the handover operation of described terminal from described mobile radio networks to WLAN (wireless local area network) be triggered, send described static parameter and described dynamic parameter simultaneously, wherein, described static parameter comprises:

The support situation of described terminal to described handover operation;

34. terminal according to claim 32, is characterized in that,

35. terminal according to claim 34, is characterized in that, described terminal interaction module also for:

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

And/or receive the described handover request sent when signal condition that described mobile radio networks detects described terminal does not meet the preset signals condition;

And/or receive the described handover request that described mobile radio networks sends when the offered load that detects self is greater than or not less than the first default offered load;

And/or when receiving offered load that described WLAN (wireless local area network) detects self and being less than or being not more than the second default offered load, the described handover request forwarded through described mobile radio networks.

36. terminal according to claim 34, it is characterized in that, described terminal is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary sent according to described mobile radio networks, determines one or more alternative WLAN (wireless local area network);

Described terminal, according to default alternative condition or from the network alternative condition that the network node of appointment obtains, is determined 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.

37. according to the described terminal of any one in claim 32 to 36, it is characterized in that, described terminal processing module also for:

When carrying out described handover operation, disconnection or maintenance are connected or specific service bearer with the signaling between described mobile radio networks.