CN103442399A

CN103442399A - Network switching method, network switching system and terminal

Info

Publication number: CN103442399A
Application number: CN2013103774368A
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: 2013-12-11
Anticipated expiration: 2033-08-26
Also published as: CN103442399B

Abstract

The invention provides a network switching method. The network switching method includes the steps that a resource preparation information frame is generated by an access network node of a wireless mobile communication network and comprises a terminal identification, resource preparation information and an access point name and / or an IP address, and the resource preparation information is used for indicating a receiving party of the resource preparation information frame to carry out resource preparation on a terminal corresponding to the terminal identification on the basis of the access point name and / or the IP address; the access network node sends the resource preparation information frame to transmit the resource preparation information frame to a wireless local area network. The invention further provides a corresponding network switching system and a terminal. By the adoption of the network switching method, the network switching system and the terminal, the wireless mobile communication network can assist the terminal in achieving access operation of the wireless local area network, and interoperation 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, urgent need 3GPP(The3rd Generation 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, comprise: the Access Network node of mobile radio networks generates resource and prepares message frame, described resource is prepared message frame and is comprised terminal iidentification, resource ready message and APN (APN, Access Point Name), and/or described resource preparation message frame comprises terminal iidentification, resource ready message and IP(Internet protocol) address, described resource ready message frame is used to indicate described resource and prepares the recipient of message frame based on described APN and/or IP address, for the terminal that described terminal iidentification is corresponding is carried out the resource preparation, described Access Network node sends described resource and prepares message frame, to transmit it to WLAN (wireless local area network).

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.

Wherein, resource preparation message frame can, for S1 signaling that had or new definition, can be also the dedicated signaling of other new definition.Preparing message frame such as resource can be handover request (Handover Required) frame.

In technique scheme, preferably, described WLAN (wireless local area network) receives described resource and prepares after message frame to carry out resource and prepare to comprise: at least one business of described terminal set up the IP carrying and/or reserve interface-free resources.

In this technical scheme, WLAN (wireless local area network) is after the resource that receives the mobile radio networks transmission is prepared message frame, 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, described Access Network node, by the core net node of described terminal or described mobile radio networks, is prepared message frame by described resource and is transferred to described WLAN (wireless local area network).

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

In technique scheme, preferably, when described Access Network node transmits described resource preparation message frame by described core net node, described resource prepare message frame also comprise following at least one or a combination set of: send reason mark, for indicate described resource to prepare message frame to described WLAN (wireless local area network), switch to the operation of described WLAN (wireless local area network) for described terminal; The objective network sign, prepare the objective network object of message frame for indicate described resource to described WLAN (wireless local area network); Terminal's status information, at least one the characteristic parameter that comprises described terminal.

In this technical scheme, by sending reason mark, can indicate to WLAN (wireless local area network): this message frame carries out interoperability for WLAN (wireless local area network) and mobile radio networks, to help terminal, realizes the network handover operation; Preparing message frame due to resource is that network management system (or control system) by WLAN (wireless local area network) receives, but it is to carry out at concrete AP that resource is prepared, thereby, by sending the objective network sign, make WLAN (wireless local area network) (network management system) can realize smoothly that resource prepares; By the transmitting terminal state information, make WLAN (wireless local area network) can recognize the state of terminal, and WLAN (wireless local area network) can be configured based on SOT state of termination the operations such as adjustment, realize the network handover operation to help terminal.

Wherein, it is handover request frame that hypothetical resource is prepared message frame, can be by " Target id " (Target ID) IE(information element) in the drop target network identity (as SSID, BSSID and/or HESSID etc.), (Cause) in IE, place the transmission reason mark in " reason ", place terminal's status information (as the ability of terminal in " Source-ToTarget-TransparentContainer ", address etc., wherein, the ability of terminal comprises whether terminal supports the interoperability of 3GPP and WLAN, channel and speed that terminal is supported, the signing authority of terminal etc.).

In technique scheme, preferably, when described Access Network node transmits described resource preparation message frame by described core net node, described resource is prepared message frame and is also comprised: the type of message sign, carry out for indicate described resource to prepare message frame to described core net node the operation that switches to described WLAN (wireless local area network) for described terminal; Wherein, described core net node directly or after recompile the described resource of transmission prepare message frame, and the resource after recompile prepares in message frame at least not comprise described type of message sign.

In this technical scheme, by type of message, identify, make the core net node recognize type and the purposes of this message frame, and be transferred in time WLAN (wireless local area network).Certainly, because the type of message sign is not necessary for WLAN (wireless local area network), therefore, the core net node can be prepared message frame to resource and carry out recompile, and removes this type of message sign, to reduce the data volume of transmission of messages.

In technique scheme, preferably, also comprise: described core net node sends the first Indication message frame to described Access Network node, containing type sign at least in described the first Indication message frame, described type sign means that described the first Indication message frame switches to the operation of described WLAN (wireless local area network) for described terminal; Described Access Network node sends the second Indication message frame to described terminal, at least comprises switching in described the second Indication message frame and carries out sign, and described switching execution sign is used to indicate described terminal and carries out the operation that switches to described WLAN (wireless local area network).

In this technical scheme, send Indication message frame (first Indication message frame and second Indication message frame) to Access Network node, Access Network node to terminal by the core net node, make terminal carry out in time the handover operation to WLAN (wireless local area network).Wherein, comprise the opportunity that the core net node sends the first Indication message frame: the core net node to WLAN (wireless local area network) forward resource prepare message frame or WLAN (wireless local area network) confirm resource inform the core net node after ready after (or other times point), can wait for Preset Time (being more than or equal to 0), the core net node can send the first Indication message frame.

In technique scheme, preferably, also comprise in described the second Indication message frame to connect and process sign, described connection is processed the value of sign and is indicated described terminal release or maintenance to be connected with the signaling between described mobile radio networks; Or described Access Network node also sends the 3rd Indication message frame to described terminal, comprise described connection in described the 3rd Indication message frame and process sign.

In this technical scheme, switching carry out sign just command terminal switch to WLAN (wireless local area network), with WLAN (wireless local area network), set up and be connected, but indicated for not being connected between terminal and mobile radio networks.Therefore, by connection, process the processing that the concrete indicating terminal of sign is connected with signaling between mobile radio networks, such as disconnecting or keeping signaling to connect.Particularly, connect the processing sign and can be included in the second Indication message frame, also can be used as the 3rd independent Indication message frame., when terminal does not receive connection processing sign, can be processed according to default setting, such as acquiescence keeps or the connection of disconnection signaling simultaneously.

In technique scheme, preferably, described the first Indication message frame is handover management (Handover command) signaling, and described type sign is arranged in switching type (Handover Type) information element of described handover management signaling; And/or described the second Indication message frame is the RRC signaling, comprise the MobilityFromEUTRACommand signaling, and target type (target RAT-Type) information element that sign is arranged in described RRC signaling is carried out in described switching.

In this technical scheme, the first Indication message frame and the second Indication message frame can be used existing signaling, and, by using existing in these signalings or newly-increased territory or information element, corresponding type sign, switching execution sign etc. are set; Certainly, the first Indication message frame and/or the second Indication message frame also can adopt the new signaling redefined, such as S1 signaling or the RRC signaling of new definition.Particularly, such as the first Indication message frame can be handover management (Handover command) message frame, and defining new value " ltetowlan " by " switching type " (Handover Type) IE for wherein, should " ltetowlan " be the type sign; Such as the second Indication message frame can be the MobilityFromEUTRACommand signaling, switching is carried out and is identified and can, with newly-built IE---" MobilityFromEUTRACommand-r12 " defines, also can expand to be defined to existing " MobilityFromEUTRACommand-r8 " or " MobilityFromEUTRACommand-r9 ".

In technique scheme, preferably, also comprise: described terminal generates terminal feature parameter message frame, and described terminal feature parameter message frame is sent to described mobile radio networks, the one or more characteristic parameter that described terminal feature parameter message frame comprises described terminal; Described mobile radio networks, when judging that described terminal feature parameter meets default access conditions, generates described resource and prepares message frame, otherwise do not generate.

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 terminal feature parameter message frame, 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 comprises static parameter, before handover operation in described terminal from from described mobile radio networks to WLAN (wireless local area network) is triggered, 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 terminal feature parameter message frame, and 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, also comprise: described terminal feature parameter message frame is the RRC signaling, comprise 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.

In this technical scheme, can adopt above-mentioned existing RRC signaling to transmit static parameter, also can be by after the transformation to this RRC signaling, for together transmitting static parameter and dynamic parameter.In addition, also can adopt other signalings, such as the signaling redefined (can be the RRC signaling) is transmitted static parameter, and this signaling can be transmitted dynamic parameter simultaneously, also can the individual transmission static parameter, and adopt other signalings that redefine to carry out the individual transmission dynamic parameter.

In technique scheme, preferably, also comprise: 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 the network switching message frame that sends to described terminal according to Access Network node or the core net node of the described mobile radio networks received of described terminal, trigger described handover operation, in described network switching message frame, at least comprise the information that described terminal triggers described handover operation that is used to indicate.

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, also comprise: described terminal is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary comprised in the switching assistance messages frame sent according to the described mobile radio networks received, determine one or more alternative WLAN (wireless local area network), and, according to default alternative condition or from the network alternative condition that the network node of appointment obtains, determine described WLAN (wireless local area network) from described alternative WLAN (wireless local area network); And described terminal generating network informational message frame, and be sent to described mobile radio networks, at least comprise the information of described WLAN (wireless local area network) in described network information message frame.

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 switching assistance messages frame is the RRC signaling, comprises downlink information transmission (DL information transfer) signaling, and described network insertion supplementary is arranged in the downlink information transmission information element of described RRC signaling; And/or described network information message frame is the RRC signaling, comprise uplink information transmission (UL information transfer) signaling and/or up switching preparation transmission (UL handover preparation transfer) signaling, the information of described WLAN (wireless local area network) is arranged in the up switching of described RRC signaling and prepares the transmission information element.

In this technical scheme, on the one hand, can adopt above-mentioned existing signaling to be transmitted, such as the reservation position of using in existing signaling, or existing information element, territory etc. are expanded; On the other hand, also can redefine new signaling, thereby be exclusively used in the information to the WLAN (wireless local area network) of network insertion supplementary or appointment.

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 described terminal feature parameter message frame: 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.

The invention allows for a kind of network switched system, comprise mobile radio networks, WLAN (wireless local area network) and terminal, wherein, described mobile radio networks comprises: the communication network processing module, generate resource for the Access Network node at described mobile radio networks and prepare message frame, described resource is prepared message frame and is comprised terminal iidentification, resource ready message and APN, and/or described resource preparation message frame comprises terminal iidentification, resource ready message and IP address, described resource ready message frame is used to indicate described resource and prepares the recipient of message frame based on described APN and/or IP address, for the terminal that described terminal iidentification is corresponding is carried out the resource preparation, the communication network interactive module, prepare message frame for sending described resource, described WLAN (wireless local area network) comprises: the LAN interactive module, prepare message frame for receiving described resource, the LAN processing module, carry out the resource preparation for according to described resource, preparing message frame.

In technique scheme, preferably, described LAN processing module receives described resource and prepares after message frame to carry out the process of resource preparation and comprise: at least one business of described terminal set up the IP carrying and/or reserve interface-free resources.

In technique scheme, preferably, described communication network interactive module is by described Access Network node, described resource is prepared to message frame and be sent to the core net node of described terminal or described mobile radio networks, and be forwarded to described WLAN (wireless local area network) by the core net node of described terminal or described mobile radio networks.

In technique scheme, preferably, when described communication network interactive module is transmitted described resource preparation message frame by described core net node, described resource prepare message frame also comprise following at least one or a combination set of: send reason mark, for indicate described resource to prepare message frame to described WLAN (wireless local area network), switch to the operation of described WLAN (wireless local area network) for described terminal; The objective network sign, prepare the objective network object of message frame for indicate described resource to described WLAN (wireless local area network); Terminal's status information, at least one the characteristic parameter that comprises described terminal.

Wherein, it is handover request frame (Handover Required) that hypothetical resource is prepared message frame, can be by " Target id " (Target ID) IE(information element) in the drop target network identity (as SSID, BSSID and/or HESSID etc.), (Cause) in IE, place the transmission reason mark in " reason ", place terminal's status information (as the ability of terminal in " Source-ToTarget-TransparentContainer ", address etc., wherein, the ability of terminal comprises whether terminal supports the interoperability of 3GPP and WLAN, channel and speed that terminal is supported, the signing authority of terminal etc.).

In technique scheme, preferably, when described communication network interactive module is transmitted described resource preparation message frame by described core net node, described resource is prepared message frame and is also comprised: the type of message sign, carry out for indicate described resource to prepare message frame to described core net node the operation that switches to described WLAN (wireless local area network) for described terminal; Wherein, described core net node directly or after recompile the described resource of transmission prepare message frame, and the resource after recompile prepares in message frame at least not comprise described type of message sign.

In technique scheme, preferably, described communication network processing module is that described core net node generates the first Indication message frame, also for described Access Network node, generate the second Indication message frame, wherein, containing type sign at least in described the first Indication message frame, described type sign means that described the first Indication message frame switches to the operation of the WLAN (wireless local area network) of described appointment for described terminal, at least comprise switching in described the second Indication message frame and carry out sign, described switching is carried out sign and is used to indicate the operation that described terminal is carried out the WLAN (wireless local area network) that switches to described appointment, described communication network interactive module is sent to described Access Network node by described the first Indication message frame by described core net node, and described the second Indication message frame is sent to described terminal by described Access Network node.

In technique scheme, preferably, also comprise in described the second Indication message frame to connect and process sign, described connection is processed the value of sign and is indicated described terminal release or maintenance to be connected with the signaling between described mobile radio networks; Or described communication network processing module is also that described Access Network node generates the 3rd Indication message frame, comprises described connection in described the 3rd Indication message frame and process sign; Described communication network interactive module is sent to described terminal by described the 3rd Indication message frame.

In technique scheme, preferably, described terminal comprises: terminal processing module, and for generating terminal feature parameter message frame, the one or more characteristic parameter that described terminal feature parameter message frame comprises described terminal; The terminal interaction module, for being sent to described mobile radio networks by described terminal feature parameter message frame; Wherein, described communication network processing module, when judging that described terminal feature parameter meets default access conditions, generates described resource and prepares message frame, otherwise do not generate.

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 terminal feature parameter message frame, 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 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, or 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 terminal feature parameter message frame, 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 feature parameter message frame is the RRC signaling, comprise 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.

In technique scheme, preferably, described terminal processing module 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 described terminal interaction module is according to the Access Network node of the described mobile radio networks received or the network switching message frame of core net node transmission, trigger described handover operation, in described network switching message frame, at least comprise the information that described terminal triggers described handover operation that is used to indicate.

In technique scheme, preferably, described terminal interaction module is also carried out active or drive sweep operation to all WLAN (wireless local area network), or receive the switching assistance messages frame that described mobile radio networks sends, comprise the network insertion supplementary in described switching assistance messages frame, and the network information message frame also generated for sending described terminal processing module; Described terminal processing module is according to result or the described network insertion supplementary of described active or drive sweep operation, determine one or more alternative WLAN (wireless local area network), and 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) from described alternative WLAN (wireless local area network), and generate described network information message frame, at least comprise the information of described WLAN (wireless local area network) in described network information message frame.

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 described terminal feature parameter message frame: 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.

According to a further aspect in the invention, also proposed a kind of terminal, having comprised: terminal processing module, for generating terminal feature parameter message frame, the one or more characteristic parameter that described terminal feature parameter message frame comprises described terminal; The terminal interaction module, for described terminal feature parameter message frame is sent to the residing mobile radio networks of described terminal,, send resource to WLAN (wireless local area network) and prepare message frame when judging that described terminal feature parameter meets default access conditions for described mobile radio networks; Wherein, described resource is prepared sign, resource ready message and the APN that message frame comprises described terminal, and/or described resource preparation message frame comprises terminal iidentification, resource ready message and IP address, described resource ready message frame is used to indicate described WLAN (wireless local area network) based on described APN and/or IP address, for described terminal is carried out the resource preparation.

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.Preparing message frame such as resource can be handover request (Handover Required) frame.

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.

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, the Access Network node of mobile radio networks generates resource and prepares message frame, described resource is prepared message frame and is comprised terminal iidentification, resource ready message and APN (APN, Access Point Name), and/or described resource preparation message frame comprises terminal iidentification, resource ready message and IP(Internet protocol) address, described resource ready message frame is used to indicate described resource and prepares the recipient of message frame based on described APN and/or IP address, for the terminal that described terminal iidentification is corresponding is carried out the resource preparation, step 104, described Access Network node sends described resource and prepares message frame, to transmit it to WLAN (wireless local area network).

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, the WLAN (wireless local area network) 204 of appointment and terminal 206, wherein, described mobile radio networks 202 comprises: communication network processing module 202A, generate resource for the Access Network node at described mobile radio networks 202 and prepare message frame, described resource is prepared message frame and is comprised terminal iidentification, resource ready message and APN, and/or described resource preparation message frame comprises terminal iidentification, resource ready message and IP address, described resource ready message frame is used to indicate described resource and prepares the recipient of message frame based on described APN and/or IP address, for the terminal 206 that described terminal iidentification is corresponding is carried out the resource preparation, communication network interactive module 202B, prepare message frame for sending described resource, described WLAN (wireless local area network) 204 comprises: LAN interactive module 204A, prepare message frame for receiving described resource, LAN processing module 204B, carry out the resource preparation for according to described resource, preparing message frame.

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, described LAN processing module 204B receives described resource and prepares after message frame to carry out the process of resource preparation and comprise: at least one business of described terminal set up the IP carrying and/or reserve interface-free resources.

In this technical scheme, WLAN (wireless local area network) is after the resource that receives mobile radio networks 202 transmissions is prepared message frame, 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 202B is by described Access Network node, described resource is prepared to message frame and be sent to the core net node of described terminal 206 or described mobile radio networks 202, and be forwarded to described WLAN (wireless local area network) 204 by the core net node of described terminal 206 or described mobile radio networks 202.

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

In technique scheme, preferably, when described communication network interactive module 202B transmits described resource preparation message frame by described core net node, described resource prepare message frame also comprise following at least one or a combination set of: send reason mark, for to the described resource of described WLAN (wireless local area network) 204 indication, preparing message frame, switch to the operation of described WLAN (wireless local area network) 204 for described terminal 206; The objective network sign, for preparing the objective network object of message frame to the described resource of described WLAN (wireless local area network) 204 indication; Terminal's status information, at least one the characteristic parameter that comprises described terminal 206.

In this technical scheme, by sending reason mark, can indicate to WLAN (wireless local area network): this message frame carries out interoperability for WLAN (wireless local area network) and mobile radio networks 202, to help terminal 206, realizes the network handover operation; Preparing message frame due to resource is that network management system (or control system) by WLAN (wireless local area network) receives, but it is to carry out at concrete AP that resource is prepared, thereby, by sending the objective network sign, make WLAN (wireless local area network) (network management system) can realize smoothly that resource prepares; By the transmitting terminal state information, make WLAN (wireless local area network) can recognize the state of terminal 206, and WLAN (wireless local area network) can be configured based on SOT state of termination the operations such as adjustment, realize the network handover operation to help terminal 206.

Wherein, it is handover request frame that hypothetical resource is prepared message frame, can be by " Target id " (Target ID) IE(information element) in the drop target network identity (as SSID, BSSID and/or HESSID etc.), (Cause) in IE, place the transmission reason mark in " reason ", place terminal's status information (as the ability of terminal 206 in " Source-ToTarget-TransparentContainer ", address etc., wherein, the ability of terminal 206 comprises whether terminal 206 supports the interoperability of 3GPP and WLAN, channel and speed that terminal 206 is supported, the signing authority of terminal 206 etc.).

In technique scheme, preferably, when described communication network interactive module 202B transmits described resource preparation message frame by described core net node, described resource is prepared message frame and is also comprised: the type of message sign, carry out for described terminal 206 operation that switches to described WLAN (wireless local area network) 204 for indicate described resource to prepare message frame to described core net node; Wherein, described core net node directly or after recompile the described resource of transmission prepare message frame, and the resource after recompile prepares in message frame at least not comprise described type of message sign.

In technique scheme, preferably, described communication network processing module is that described core net node generates the first Indication message frame, also for described Access Network node, generate the second Indication message frame, wherein, containing type sign at least in described the first Indication message frame, described type sign means that described the first Indication message frame switches to the operation of the WLAN (wireless local area network) 204 of described appointment for described terminal 206, at least comprise switching in described the second Indication message frame and carry out sign, described switching is carried out sign and is used to indicate the operation that described terminal 206 is carried out the WLAN (wireless local area network) 204 that switches to described appointment, described communication network interactive module 202B is sent to described Access Network node by described the first Indication message frame by described core net node, and described the second Indication message frame is sent to described terminal 206 by described Access Network node.

In this technical scheme, send Indication message frame (first Indication message frame and second Indication message frame) to Access Network node, Access Network node to terminal 206 by the core net node, make terminal 206 carry out in time the handover operation to WLAN (wireless local area network).Wherein, comprise the opportunity that the core net node sends the first Indication message frame: the core net node to WLAN (wireless local area network) forward resource prepare message frame or WLAN (wireless local area network) confirm resource inform the core net node after ready after (or other times point), can wait for Preset Time (being more than or equal to 0), the core net node can send the first Indication message frame.

In technique scheme, preferably, also comprise in described the second Indication message frame to connect and process sign, described connection is processed the value of sign and is indicated described terminal 206 releases or maintenance to be connected with the signaling between described mobile radio networks 202; Or described communication network processing module is also that described Access Network node generates the 3rd Indication message frame, comprises described connection in described the 3rd Indication message frame and process sign; Described communication network interactive module 202B is sent to described terminal 206 by described the 3rd Indication message frame.

In this technical scheme, switching carry out sign just command terminal 206 switch to WLAN (wireless local area network), with WLAN (wireless local area network), set up and be connected, but indicated for not being connected between terminal 206 and mobile radio networks 202.Therefore, by connection, process the processing that the concrete indicating terminal 206 of sign is connected with signaling between mobile radio networks 202, such as disconnecting or keeping signaling to connect.Particularly, connect the processing sign and can be included in the second Indication message frame, also can be used as the 3rd independent Indication message frame., when terminal 206 does not receive connection processing sign, can be processed according to default setting, such as acquiescence keeps or the connection of disconnection signaling simultaneously.

In technique scheme, preferably, described terminal 206 comprises: terminal processing module 206A, and for generating terminal feature parameter message frame, the one or more characteristic parameter that described terminal feature parameter message frame comprises described terminal 206; Terminal interaction module 206B, for being sent to described mobile radio networks 202 by described terminal feature parameter message frame; Wherein, described communication network processing module, when judging that described terminal feature parameter meets default access conditions, generates described resource and prepares message frame, otherwise do not generate.

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, described terminal interaction module 206B 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, send described terminal feature parameter message frame, 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 comprises static parameter, described terminal interaction module 206B is before in described terminal 206, the handover operation from described mobile radio networks 202 to WLAN (wireless local area network) is triggered, 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, send described terminal feature parameter message frame, 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 processing module 206A 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 described terminal interaction module 206B is according to the Access Network node of the described mobile radio networks 202 received or the network switching message frame of core net node transmission, trigger described handover operation, at least comprise the information that described terminal 206 triggers described handover operation that is used to indicate in described network switching message frame.

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 terminal interaction module 206B also carries out active or drive sweep operation to all WLAN (wireless local area network), or receive the switching assistance messages frame that described mobile radio networks 202 sends, comprise the network insertion supplementary in described switching assistance messages frame, and the network information message frame also generated for sending described terminal processing module 206A; Described terminal processing module 206A is according to result or the described network insertion supplementary of described active or drive sweep operation, determine one or more alternative WLAN (wireless local area network), and 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 generate described network information message frame, at least comprise the information of described WLAN (wireless local area network) 204 in described network information message frame.

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 switching assistance messages frame is the RRC signaling, comprises downlink information transmission (DL information transfer) signaling, and described network insertion supplementary is arranged in the downlink information transmission information element of described RRC signaling; And/or described network information message frame is the RRC signaling, comprise uplink information transmission (UL information transfer) signaling and/or up switching preparation transmission (UL handover preparation transfer) signaling, the information of described WLAN (wireless local area network) 204 is arranged in the up switching of described RRC signaling and prepares the transmission information element.

In this technical scheme, on the one hand, can adopt above-mentioned existing signaling to be transmitted, such as the reservation position of using in existing signaling, or existing information element, territory etc. are expanded; On the other hand, also can redefine new signaling, thereby be exclusively used in the information to the WLAN (wireless local area network) 204 of network insertion supplementary or appointment.

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 206 to carry out described handover operation in conjunction with described terminal feature parameter message frame: 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 the support terminal network switching process such as whether, can support terminal 206 wish the business of switching etc.

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, and for generating terminal feature parameter message frame, the one or more characteristic parameter that described terminal feature parameter message frame comprises described terminal; Terminal interaction module 604, for described terminal feature parameter message frame is sent to the residing mobile radio networks of described terminal 600,, send resource to WLAN (wireless local area network) and prepare message frame when judging that described terminal feature parameter meets default access conditions for described mobile radio networks; Wherein, described resource is prepared sign, resource ready message and the APN that message frame comprises described terminal, and/or described resource preparation message frame comprises terminal iidentification, resource ready message and IP address, described resource ready message frame is used to indicate 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 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, described 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 terminal feature parameter message frame, 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 comprises static parameter, described 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, or 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 terminal feature parameter message frame, 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 processing module 602 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 described terminal interaction module 604 is according to the Access Network node of the described mobile radio networks received or the network switching message frame of core net node transmission, trigger described handover operation, at least comprise the information that described terminal 600 triggers described handover operation that is used to indicate in described network switching message frame.

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 is also carried out active or drive sweep operation to all WLAN (wireless local area network), or receive the switching assistance messages frame that described mobile radio networks sends, comprise the network insertion supplementary in described switching assistance messages frame, and the network information message frame also generated for sending described terminal processing module 602; Described terminal processing module 602 is according to result or the described network insertion supplementary of described active or drive sweep operation, determine one or more alternative WLAN (wireless local area network), and 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) from described alternative WLAN (wireless local area network), and generate described network information message frame, at least comprise the information of described WLAN (wireless local area network) in described network information message frame.

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.

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, a kind of network switched system and a kind of terminal, 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:

The Access Network node of mobile radio networks generates resource and prepares message frame, described resource is prepared message frame and is comprised terminal iidentification, resource ready message and APN and/or IP address, described resource ready message frame is used to indicate described resource and prepares the recipient of message frame based on described APN and/or IP address, for the terminal that described terminal iidentification is corresponding is carried out the resource preparation;

Described Access Network node sends described resource and prepares message frame, to transmit it to WLAN (wireless local area network).

2. method for switching network according to claim 1, is characterized in that, described WLAN (wireless local area network) receives described resource and prepares after message frame to carry out resource and prepare to comprise:

For at least one business of described terminal set up the IP carrying and/or reserves interface-free resources.

3. method for switching network according to claim 1, is characterized in that,

Described Access Network node, by the core net node of described terminal or described mobile radio networks, is prepared message frame by described resource and is transferred to described WLAN (wireless local area network).

4. method for switching network according to claim 3, is characterized in that, when described Access Network node transmits described resource and prepares message frame by described core net node, described resource prepare message frame also comprise following at least one or a combination set of:

Send reason mark, for indicate described resource to prepare message frame to described WLAN (wireless local area network), switch to the operation of described WLAN (wireless local area network) for described terminal;

The objective network sign, prepare the objective network object of message frame for indicate described resource to described WLAN (wireless local area network);

Terminal's status information, at least one the characteristic parameter that comprises described terminal.

5. method for switching network according to claim 4, is characterized in that, when described Access Network node transmits described resource preparation message frame by described core net node, described resource is prepared message frame and also comprised:

The type of message sign, carry out for indicate described resource to prepare message frame to described core net node the operation that switches to described WLAN (wireless local area network) for described terminal;

Wherein, described core net node directly or after recompile the described resource of transmission prepare message frame, and the resource after recompile prepares in message frame at least not comprise described type of message sign.

6. method for switching network according to claim 5, is characterized in that, also comprises:

Described core net node sends the first Indication message frame to described Access Network node, containing type sign at least in described the first Indication message frame, described type sign means that described the first Indication message frame switches to the operation of the WLAN (wireless local area network) of described appointment for described terminal;

Described Access Network node sends the second Indication message frame to described terminal, at least comprises switching in described the second Indication message frame and carries out sign, and described switching is carried out sign and is used to indicate the operation that described terminal is carried out the WLAN (wireless local area network) that switches to described appointment.

7. method for switching network according to claim 6, is characterized in that,

Also comprise in described the second Indication message frame to connect and process sign, described connection is processed the value of sign and is indicated described terminal release or maintenance to be connected with the signaling between described mobile radio networks;

Or described Access Network node also sends the 3rd Indication message frame to described terminal, comprise described connection in described the 3rd Indication message frame and process sign.

8. method for switching network according to claim 6, is characterized in that,

Described the first Indication message frame is handover management (Handover command) signaling, and described type sign is arranged in switching type (Handover Type) information element of described handover management signaling;

And/or described the second Indication message frame is the RRC signaling, comprise the MobilityFromEUTRACommand signaling, and target type (target RAT-Type) information element that sign is arranged in described RRC signaling is carried out in described switching.

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

Described terminal generates terminal feature parameter message frame, and described terminal feature parameter message frame is sent to described mobile radio networks, the one or more characteristic parameter that described terminal feature parameter message frame comprises described terminal;

Described mobile radio networks, when judging that described terminal feature parameter meets default access conditions, generates described resource and prepares message frame, otherwise do not generate.

10. method for switching network according to claim 9, 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 terminal feature parameter message frame, 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.

11. method for switching network according to claim 9, it is characterized in that, described characteristic parameter comprises static parameter, before handover operation in described terminal from from described mobile radio networks to WLAN (wireless local area network) is triggered, 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 terminal feature parameter message frame, and 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.

12. method for switching network according to claim 11, is characterized in that, also comprises:

Described terminal feature parameter message frame is the RRC signaling, comprise 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.

13. according to claim 10 to the described method for switching network of any one in 12, it is characterized in that, also comprise:

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 the network switching message frame that sends to described terminal according to Access Network node or the core net node of the described mobile radio networks received of described terminal, trigger described handover operation, in described network switching message frame, at least comprise the information that described terminal triggers described handover operation that is used to indicate.

14. method for switching network according to claim 13, is characterized in that, also comprises:

Described terminal is according to the active to all WLAN (wireless local area network) or drive sweep operation, or the network insertion supplementary comprised in the switching assistance messages frame sent according to the described mobile radio networks received, determine one or more alternative WLAN (wireless local area network), and, according to default alternative condition or from the network alternative condition that the network node of appointment obtains, determine described WLAN (wireless local area network) from described alternative WLAN (wireless local area network); And

Described terminal generating network informational message frame, and be sent to described mobile radio networks, at least comprise the information of described WLAN (wireless local area network) in described network information message frame.

15. method for switching network according to claim 14, 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.

16. method for switching network according to claim 14, is characterized in that,

Described switching assistance messages frame is the RRC signaling, comprises downlink information transmission (DL information transfer) signaling, and described network insertion supplementary is arranged in the downlink information transmission information element of described RRC signaling;

And/or described network information message frame is the RRC signaling, comprise uplink information transmission (UL information transfer) signaling and/or up switching preparation transmission (UL handover preparation transfer) signaling, the information of described WLAN (wireless local area network) is arranged in the up switching of described RRC signaling and prepares the transmission information element.

17. method for switching network according to claim 9, 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 described terminal feature parameter message frame:

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.

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

Described mobile radio networks comprises:

The communication network processing module, generate resource for the Access Network node at described mobile radio networks and prepare message frame, described resource is prepared message frame and is comprised terminal iidentification, resource ready message and APN and/or IP address, described resource ready message frame is used to indicate described resource and prepares the recipient of message frame based on described APN and/or IP address, for the terminal that described terminal iidentification is corresponding is carried out the resource preparation;

The communication network interactive module, prepare message frame for sending described resource;

Described WLAN (wireless local area network) comprises:

The LAN interactive module, prepare message frame for receiving described resource;

The LAN processing module, carry out the resource preparation for according to described resource, preparing message frame.

19. network switched system according to claim 18, is characterized in that, described LAN processing module receives described resource and prepares after message frame to carry out the process of resource preparation and comprise:

20. network switched system according to claim 18, it is characterized in that, described communication network interactive module is by described Access Network node, described resource is prepared to message frame and be sent to the core net node of described terminal or described mobile radio networks, and be forwarded to described WLAN (wireless local area network) by the core net node of described terminal or described mobile radio networks.

21. network switched system according to claim 20, is characterized in that, when described communication network interactive module is transmitted described resource and is prepared message frame by described core net node, described resource prepare message frame also comprise following at least one or a combination set of:

22. network switched system according to claim 21, is characterized in that, when described communication network interactive module is transmitted described resource preparation message frame by described core net node, described resource is prepared message frame and is also comprised:

23. network switched system according to claim 22, is characterized in that,

Described communication network processing module is that described core net node generates the first Indication message frame, also for described Access Network node, generate the second Indication message frame, wherein, containing type sign at least in described the first Indication message frame, described type sign means that described the first Indication message frame switches to the operation of the WLAN (wireless local area network) of described appointment for described terminal, at least comprise switching in described the second Indication message frame and carry out sign, described switching is carried out sign and is used to indicate the operation that described terminal is carried out the WLAN (wireless local area network) that switches to described appointment;

Described communication network interactive module is sent to described Access Network node by described the first Indication message frame by described core net node, and described the second Indication message frame is sent to described terminal by described Access Network node.

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

Or described communication network processing module is also that described Access Network node generates the 3rd Indication message frame, comprises described connection in described the 3rd Indication message frame and process sign; Described communication network interactive module is sent to described terminal by described the 3rd Indication message frame.

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

26. network switched system according to claim 18, is characterized in that, described terminal comprises:

Terminal processing module, for generating terminal feature parameter message frame, the one or more characteristic parameter that described terminal feature parameter message frame comprises described terminal;

The terminal interaction module, for being sent to described mobile radio networks by described terminal feature parameter message frame;

Wherein, described communication network processing module, when judging that described terminal feature parameter meets default access conditions, generates described resource and prepares message frame, otherwise do not generate.

27. network switched system according to claim 26, 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 terminal feature parameter message frame, wherein, described dynamic parameter comprises:

The real-time status information of described terminal;

28. network switched system according to claim 26, it is characterized in that, described characteristic parameter 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, or 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 terminal feature parameter message frame, wherein, described static parameter comprises:

The support situation of described terminal to described handover operation;

29. network switched system according to claim 28, it is characterized in that, described terminal feature parameter message frame is the RRC signaling, comprise 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.

30. according to the described network switched system of any one in claim 27 to 29, it is characterized in that,

Described terminal processing module 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 described terminal interaction module is according to the Access Network node of the described mobile radio networks received or the network switching message frame of core net node transmission, trigger described handover operation, in described network switching message frame, at least comprise the information that described terminal triggers described handover operation that is used to indicate.

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

Described terminal interaction module is also carried out active or drive sweep operation to all WLAN (wireless local area network), or receive the switching assistance messages frame that described mobile radio networks sends, comprise the network insertion supplementary in described switching assistance messages frame, and the network information message frame also generated for sending described terminal processing module;

Described terminal processing module is according to result or the described network insertion supplementary of described active or drive sweep operation, determine one or more alternative WLAN (wireless local area network), and 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) from described alternative WLAN (wireless local area network), and generate described network information message frame, at least comprise the information of described WLAN (wireless local area network) in described network information message frame.

32. network switched system according to claim 31, is characterized in that, the information of described WLAN (wireless local area network) comprise following at least one or a combination set of:

33. network switched system according to claim 31, is characterized in that,

34. network switched system according to claim 26, 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 described terminal feature parameter message frame:

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

The terminal interaction module, for described terminal feature parameter message frame is sent to the residing mobile radio networks of described terminal,, send resource to WLAN (wireless local area network) and prepare message frame when judging that described terminal feature parameter meets default access conditions for described mobile radio networks;

Wherein, described resource is prepared sign, resource ready message and APN and/or the IP address that message frame comprises described terminal, described resource ready message frame is used to indicate described WLAN (wireless local area network) based on described APN and/or IP address, for described terminal is carried out the resource preparation.

36. terminal according to claim 35, 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 terminal feature parameter message frame, wherein, described dynamic parameter comprises:

The real-time status information of described terminal;

37. terminal according to claim 35, it is characterized in that, described characteristic parameter 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, or 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 terminal feature parameter message frame, wherein, described static parameter comprises:

The support situation of described terminal to described handover operation;

38. according to the described terminal of claim 37, it is characterized in that, described terminal feature parameter message frame is the RRC signaling, comprise 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.

39. according to the described terminal of any one in claim 26 to 38, it is characterized in that,

40. according to the described terminal of claim 39, it is characterized in that,

Described terminal processing module is according to result or the described network insertion supplementary of described active or drive sweep operation, determine one or more alternative WLAN (wireless local area network), and 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) from described alternative WLAN (wireless local area network), and generate described network information message frame, at least comprise the information of described WLAN (wireless local area network) in described network information message frame;

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;

Described switching assistance messages frame is the RRC signaling, comprises downlink information transmission (DL information transfer) signaling, and described network insertion supplementary is arranged in the downlink information transmission information element of described RRC signaling; And/or described network information message frame is the RRC signaling, comprise uplink information transmission (UL information transfer) signaling and/or up switching preparation transmission (UL handover preparation transfer) signaling, the information of described WLAN (wireless local area network) is arranged in the up switching of described RRC signaling and prepares the transmission information element.