CN104066121A

CN104066121A - Stream dividing method, device and system of wireless local area network

Info

Publication number: CN104066121A
Application number: CN201310097538.4A
Authority: CN
Inventors: 段小嫣; 欧阳国威; 高晨亮; 金辉; 衣强
Original assignee: Huawei Device Co Ltd
Current assignee: Huawei Device Co Ltd
Priority date: 2013-03-22
Filing date: 2013-03-22
Publication date: 2014-09-24
Anticipated expiration: 2033-03-22
Also published as: CN104066121B

Abstract

The invention discloses a stream dividing method, device and system of a wireless local area network. The stream dividing method of the wireless local area network includes that when user equipment prepares for switching to a second access network from a first access network, discovering and selecting a strategy according to an access network, determining that the priority of the wireless local area network WLAN is higher than that of the second access network, wherein the first access network and the second access network are different in a third-generation mobile communication partner program 3GPP communication system; transmitting all the data stream through the WLAN or transmitting one part of data stream through the WLAN, switching to the second access network, and transmitting the other part of data stream through the second access network. The stream dividing method, device and system of the wireless local area network solve the problems of the prior art that the user equipment UE cannot use the surrounding WLAN network resources when switching between different wireless access networks in the 3GPP network, so that the WLAN network resources are wasted, and the business quality of the user equipment UE is influenced.

Description

WLAN (wireless local area network) shunt method and device, system

Technical field

The embodiment of the present invention relates to communication technical field, relates in particular to a kind of WLAN (wireless local area network) shunt method and device, system.

Background technology

3G (Third Generation) Moblie partnership projects (3rd Generation Partnership Project, 3GPP) normal structure has specified WLAN (wireless local area network) (Wireless Local Access Network, WLAN) shunting (offload) standard, be subscriber equipment (User Equipment, UE) can use its contracting in 3GPP network, by WLAN Access Network access the Internet (Internet), thereby realize the switching of data flow from 3GPP network to wlan network, alleviate 3GPP Access Network load, improve the objects such as user's experience.

But specify based on 3GPP standard, in the time switching between the different radio Access Network of subscriber equipment in 3GPP network, if the wireless access network inadequate resource of Target cell, can cause the current speech quality of carrying out of UE to decline or conversation, thereby affect the quality of service of UE.

Summary of the invention

The invention provides a kind of WLAN (wireless local area network) shunt method and device, system, in order to switch between the different radio Access Network in 3GPP network at UE, when the wireless access network inadequate resource of Target cell, promote the quality of service of UE.

First aspect, the invention provides a kind of WLAN (wireless local area network) shunt method, comprising:

Subscriber equipment is being switched to the handoff preparation phase of the second Access Network from the first Access Network, according to access network discovery and selection strategy, determine that the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network;

By described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow.

Based on first aspect, in the possible implementation of the first, described subscriber equipment, before being switched to the handoff preparation phase of the second Access Network from the first Access Network, also comprises:

Described subscriber equipment carries out handover event detection according to handover event parameter, and in the time handover event being detected, prepares to carry out being switched to described the second Access Network from described the first Access Network; Or,

Described subscriber equipment receives the switching preparation notification message that first network equipment sends, described switching prepares at least to comprise the second Access Network information in notification message, be switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network, described first network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network.

The possible implementation of the first based on first aspect, in the possible implementation of the second, before described subscriber equipment carries out handover event detection according to handover event parameter, also comprises:

Described subscriber equipment receives described access network discovery and the selection strategy of access network discovery and selection functional entity transmission, and described access network discovery and selection strategy comprise described handover event parameter; Or

Described subscriber equipment receives the measurement configuration parameter of the access network equipment transmission of described the first Access Network, and described measurement configuration parameter comprises described handover event parameter.

Based on the possible implementation of first or the second of first aspect or first aspect, in the third possible implementation, the precedence information between described access network discovery wireless access network and the described WLAN (wireless local area network) WLAN inner different from also comprising described 3GPP communication system in selection strategy.

Based on first aspect or first aspect first to the third arbitrary possible implementation, in the 4th kind of possible implementation, described by described WLAN transmission all data streams, comprising:

Described subscriber equipment is not supported simultaneously by described the second Access Network and described WLAN transmitting data stream, by described WLAN (wireless local area network) WLAN transmission all data streams.

Based on first aspect or first aspect first to the third arbitrary possible implementation, in the 5th kind of possible implementation, describedly transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow, comprising:

If described subscriber equipment support simultaneously by described the second Access Network and described WLAN transmitting data stream, and described subscriber equipment is according to described access network discovery and selection strategy is definite is merely able to transmit a part of data flow by described WLAN:

When transmitting a part of data flow by described WLAN, carry out and be switched to described the second Access Network from described the first Access Network, by described second Access Network transmission another part data flow; Or,

After transmitting a part of data flow by described WLAN, discharge the 3GPP communication resource corresponding with the data flow of transmitting by described WLAN in described the first Access Network, carry out and be switched to described the second Access Network from described the first Access Network, and by described second Access Network transmission another part data flow.

The possible implementation of the first based on first aspect, in the 6th kind of possible implementation, transmit a part of data flow described by described WLAN, and be switched to described the second Access Network, in process by described second Access Network transmission another part data flow, comprising:

Described subscriber equipment is in the time that execution is switched to the handover execution stage of described the second Access Network from described the first Access Network, access network equipment to described the second Access Network sends handoff completion message, in described handoff completion message, be included in the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission; Or,

Described subscriber equipment is in the time that execution is switched to the handoff preparation phase of described the second Access Network from described the first Access Network, send to switch to described first network equipment and prepare push-notification-answer message, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network.

Based on the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation, if when described handoff completion message or described switching prepare to be also included in push-notification-answer message beared information corresponding to the data flow of described WLAN transmission;

Transmit a part of data flow described by described WLAN, and be switched to described the second Access Network, in the process by described second Access Network transmission another part data flow, also comprise:

Described subscriber equipment, carrying out after described the first Access Network is switched to described the second Access Network, discharges the 3GPP communication resource corresponding with the data flow of transmitting by described WLAN in described the second Access Network.

Second aspect, the embodiment of the present invention provides a kind of WLAN (wireless local area network) shunt method, comprising:

Subscriber equipment receives the switching preparation failed message that second network equipment sends, described switching is prepared at least to comprise the second Access Network information in failed message, is prepared unsuccessfully in order to the switching of notifying described subscriber equipment to be switched to described the second Access Network from described the first Access Network;

According to described access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams;

Described second network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network, and described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network.

The third aspect, the invention provides a kind of subscriber equipment, comprising:

Determination module, be used in the handoff preparation phase that is switched to the second Access Network from the first Access Network, according to access network discovery and selection strategy, determine that the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network;

Transport module, for transmitting all data streams by described WLAN, or transmits a part of data flow by described WLAN, and is switched to described the second Access Network, by described second Access Network transmission another part data flow.

Based on the third aspect, in the possible implementation of the first, described subscriber equipment also comprises:

Detection module, for before described determination module is switched to the handoff preparation phase of the second Access Network from the first Access Network, carry out handover event detection according to handover event parameter, and in the time handover event being detected, prepare to carry out being switched to described the second Access Network from described the first Access Network; Or

Receiver module, for before described determination module is switched to the handoff preparation phase of the second Access Network from the first Access Network, receive the switching preparation notification message that first network equipment sends, described switching prepares at least to comprise the second Access Network information in notification message, be switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network, described first network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network.

The possible implementation of the first based on the third aspect, in the possible implementation of the second, described detection module comprises:

The first receiving element, for before carrying out handover event detection according to handover event parameter, receive described access network discovery and selection strategy that access network discovery and selection functional entity send, described access network discovery and selection strategy comprise described handover event parameter; Or

For before carrying out handover event detection according to handover event parameter, receive the measurement configuration parameter of the access network equipment transmission of described the first Access Network, described measurement configuration parameter comprises described handover event parameter.

Based on the possible implementation of first or the second of the third aspect or the third aspect, in the third possible implementation, the precedence information between described access network discovery wireless access network and the described WLAN (wireless local area network) WLAN inner different from also comprising described 3GPP in selection strategy.

Based on the third aspect or the third aspect first to the third arbitrary possible implementation, in the 4th kind of possible implementation, described transport module, specifically for not supporting at described subscriber equipment simultaneously by described the second Access Network and described WLAN transmitting data stream, by described WLAN (wireless local area network) WLAN transmission all data streams.

Based on the third aspect or the third aspect first to the third arbitrary possible implementation, in the 5th kind of possible implementation, described transport module specifically for:

If described subscriber equipment support is simultaneously by described the second Access Network and described WLAN transmitting data stream, and according to described access network discovery and selection strategy is definite is merely able to transmit a part of data flow by described WLAN:

When transmitting a part of data flow by described WLAN, carry out and be switched to described the second Access Network from described the first Access Network, by described second Access Network transmission another part data flow; Or

The possible implementation of the first based on the third aspect, in the 6th kind of possible implementation, described transport module comprises:

The first transmitting element, for in the time that execution is switched to the handover execution stage of described the second Access Network from described the first Access Network, access network equipment to described the second Access Network sends handoff completion message, in described handoff completion message, be included in the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission; Or,

The second transmitting element, for in the time that execution is switched to the handoff preparation phase of described the second Access Network from described the first Access Network, send to switch to described first network equipment and prepare push-notification-answer message, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network.

Based on the 6th kind of possible implementation of the third aspect, in the 7th kind of possible implementation, if described handoff completion message or described switching prepare to be also included in push-notification-answer message the beared information corresponding to data flow of described WLAN transmission, during not included in beared information corresponding to the data flow of described WLAN transmission; Described transport module also comprises:

Releasing unit, for carrying out after described the first Access Network is switched to described the second Access Network, discharges the 3GPP communication resource corresponding with the data flow of transmitting by described WLAN in described the second Access Network.

Fourth aspect, the embodiment of the present invention provides a kind of subscriber equipment, comprising:

Receiver module, the switching preparation failed message sending for receiving second network equipment, described switching is prepared at least to comprise the second Access Network information in failed message, is prepared unsuccessfully in order to the switching of notifying described subscriber equipment to be switched to described the second Access Network from described the first Access Network;

Determination module, for according to described access network discovery and selection strategy, determines that the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network;

Transport module, for transmitting all data streams by described WLAN;

The 5th aspect, the invention provides a kind of WLAN (wireless local area network) shunt method, comprising:

First network equipment is switched to the handoff preparation phase of the second Access Network from the first Access Network at subscriber equipment, send to switch to described subscriber equipment and prepare notification message, described switching prepares at least to comprise the second Access Network information in notification message, be switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network, so that described subscriber equipment is according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow,

Described first network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network, and described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network.

Based on the 5th aspect, in the possible implementation of the first, described first network equipment, after subscriber equipment sends switching preparation notification message, also comprises:

Described first network equipment receives the switching preparation push-notification-answer message that described subscriber equipment sends, and described switching is prepared push-notification-answer message and comprised the beared information corresponding to data flow that will transmit at described the second Access Network;

Described first network equipment prepares according to described switching the beared information corresponding to data flow that will transmit at described the second Access Network that push-notification-answer message comprises, send handover request message to another network equipment, described handover request message comprises will be at the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission, described another network equipment comprises access network equipment and/or the equipment of the core network of the second Access Network.

The 6th aspect, the invention provides a kind of WLAN (wireless local area network) shunt method, comprising:

When the switching that second network equipment is switched to the second Access Network at subscriber equipment from the first Access Network is prepared unsuccessfully, send to switch to described subscriber equipment and prepare failed message, described switching prepares at least to comprise described the second Access Network information in failed message, so that described subscriber equipment is according to described access network discovery and selection strategy, if determine, the priority of WLAN is higher than the priority of described the second Access Network, by WLAN (wireless local area network) WLAN transmission all data streams;

The 7th aspect, the invention provides a kind of network equipment, be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, comprising:

Sending module, for be switched to the handoff preparation phase of the second Access Network from the first Access Network at subscriber equipment, send to switch to described subscriber equipment and prepare notification message, described switching prepares at least to comprise the second Access Network information in notification message, be switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network, so that described subscriber equipment is according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow.

Based on the 7th aspect, in the possible implementation of the first, after sending switching preparation notification message to subscriber equipment at described sending module;

Described receiver module, the switching preparation push-notification-answer message also sending for receiving described subscriber equipment, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network;

Described sending module, also prepare for the switching receiving according to described receiver module the beared information corresponding to data flow that will transmit at described the second Access Network that push-notification-answer message comprises, send handover request message to another network equipment, described handover request message comprises will be at the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission, described another network equipment comprises access network equipment and/or the equipment of the core network of the second Access Network.

Eight aspect, the invention provides a kind of network equipment, be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, comprising:

Sending module, while preparing unsuccessfully for the switching that is switched to the second Access Network from the first Access Network at subscriber equipment, send to switch to described subscriber equipment and prepare failed message, described switching prepares at least to comprise described the second Access Network information in failed message, so that described subscriber equipment is according to described access network discovery and selection strategy, if determine, the priority of WLAN is higher than the priority of described the second Access Network, by WLAN (wireless local area network) WLAN transmission all data streams;

The described network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network, and described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network.

The 9th aspect, the invention provides a kind of WLAN (wireless local area network) separate system, comprising: subscriber equipment, the network equipment, access network discovery and selection functional entity;

Described subscriber equipment is the subscriber equipment described in the above-mentioned third aspect, and the described network equipment is the network equipment described in above-mentioned the 7th aspect; Or,

Described subscriber equipment is the subscriber equipment described in above-mentioned fourth aspect, and the described network equipment is the network equipment described in above-mentioned eight aspect;

Described access network discovery and selection functional entity, for sending access network discovery and selection strategy to described subscriber equipment, described access network discovery comprises the precedence information between wireless access network and the described WLAN (wireless local area network) WLAN that described 3GPP communication system is inner different from selection strategy, so that described subscriber equipment is in the handoff preparation phase that is switched to the second Access Network from the first Access Network, when handover event detected, according to access network discovery and selection strategy, if determine, the priority of described WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP is inner different with described the second Access Network.

Based on the 9th aspect, in the possible implementation of the first, the described network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network.

The possible implementation of the first based on the 9th aspect or the 9th aspect, in the possible implementation of the second, also comprises handover event parameter in described access network discovery and selection strategy.

The present invention is in the time that subscriber equipment execution is switched to the second Access Network from the first Access Network of 3GPP communication system inside, according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmission all data streams, or transmit a part of data flow by described WLAN (wireless local area network) WLAN, be switched to described the second Access Network, and by described second Access Network transmission another part data flow.When the inadequate resource of the second Access Network, and cause handoff failure, or subscriber equipment is switched to after the second Access Network when quality of service declines, the embodiment of the present invention can be passed through WLAN transmitting data stream, improve the utilance of wlan network resource, ensure the quality of service of subscriber equipment, improved user's Experience Degree.

Brief description of the drawings

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Fig. 1 provides for one embodiment of the invention;

The signaling diagram of the WLAN (wireless local area network) shunt method that Fig. 2 provides for another embodiment of the present invention;

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Fig. 3 provides for another embodiment of the present invention;

The signaling diagram of the WLAN (wireless local area network) shunt method that Fig. 4 provides for another embodiment of the present invention;

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Fig. 5 provides for another embodiment of the present invention;

The signaling diagram of the WLAN (wireless local area network) shunt method that Fig. 6 provides for another embodiment of the present invention;

The structural representation of the subscriber equipment that Fig. 7 provides for another embodiment of the present invention;

The structural representation of the subscriber equipment that Fig. 8 provides for another embodiment of the present invention;

The structural representation of the network equipment that Fig. 9 provides for another embodiment of the present invention;

The structural representation of the network equipment that Figure 10 provides for another embodiment of the present invention;

The structural representation of the network equipment that Figure 11 provides for another embodiment of the present invention;

The structural representation of the network equipment that Figure 12 provides for another embodiment of the present invention;

The structural representation of the WLAN (wireless local area network) separate system that Figure 13 provides for another embodiment of the present invention;

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Figure 14 provides for another embodiment of the present invention;

The structural representation of the subscriber equipment that Figure 15 provides for another embodiment of the present invention.

Embodiment

For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

At present, the access network discovery that 3GPP standard specifies and selection function (Access Network Discoveryand Selection Function, be called for short ANDSF) entity, or claiming ANDSF server, the access network discovery providing to UE and selection strategy (being called for short ANDSF strategy) can not trigger UE and select between the switching between the inner different wireless access network of 3GPP and WLAN shunting.

In the time that UE moves, may occur that the wireless access network signal of the current 3GPP of UE community is weaker than the situation of the wireless access network signal of neighbours 3GPP community, the wireless access network of supposing the current 3GPP of UE community is different from the wireless access network of neighbours 3GPP community, will trigger UE is switched to neighbours 3GPP community wireless access network by the wireless access network of current 3GPP community, that is: the switching of UE between the inner different radio Access Network of 3GPP.If the wireless access network inadequate resource of neighbours 3GPP community causes handoff failure, or after UE is switched to the wireless access network of neighbours 3GPP community, quality of service declines, now, even if there is available WLAN access network around in UE, because can not triggering UE, ANDSF strategy selects between the switching between the inner different wireless access network of 3GPP and WLAN shunting, while making to switch between the different radio Access Network of UE in 3GPP network, cannot use the wlan network resource existing around, cause the waste of wlan network resource, affect the quality of service of UE.

A kind of WLAN (wireless local area network) shunt method provided by the invention, can realize the switching of subscriber equipment between the inner different radio Access Network of 3GPP time, can utilize WLAN to carry out data distribution.

Technical scheme of the present invention, can be applied to 3 G mobile communication network 3GPP system, wherein, the inner different wireless access network of 3GPP for example comprises Universal Terrestrial Radio Access Network (the Evolved Universal Terrestrial Radio Access Network of evolution, E-UTRAN), universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS), UMTS Terrestrial radio access network (UMTS Terrestrial Radio Access Network, UTRAN), GSM EDGE Radio Access Network (GSM EDGE Radio Access Network, GERAN).

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Fig. 1 provides for one embodiment of the invention, as shown in Figure 1, the WLAN (wireless local area network) shunt method of the present embodiment can comprise:

101, subscriber equipment, be switched to the handoff preparation phase of the second Access Network from the first Access Network, according to access network discovery and selection strategy, determines that the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network.

Wherein, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network.

In an optional execution mode of the present invention, before subscriber equipment preparation execution is switched to the second Access Network from the first Access Network, comprising:

Described subscriber equipment carries out handover event detection according to handover event parameter, and in the time handover event being detected, prepares to carry out being switched to described the second Access Network from described the first Access Network; Or

Described subscriber equipment receives the switching preparation notification message that the network equipment sends, described switching prepares at least to comprise the second Access Network information in notification message, is switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network.

Wherein, the described network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network, access network equipment for example comprises base station, Radio Access Controller etc., equipment of the core network for example comprises mobile management entity (Mobility Management Entity, be called for short MME), the serving GPRS support node of general packet radio service (General Packet Radio Service, be called for short GPRS) etc.

In an optional execution mode of the present invention, described subscriber equipment comprises before carrying out handover event detection according to handover event parameter:

In an optional execution mode of the present invention, described access network discovery also comprises the precedence information between wireless access network and the described WLAN (wireless local area network) WLAN that described 3GPP is inner different from the described access network discovery of selecting server to send and selection strategy.

102, by described WLAN (wireless local area network) WLAN transmission all data streams.

In an optional execution mode of the present invention, if when described subscriber equipment is not supported simultaneously by described the second Access Network and described WLAN (wireless local area network) WLAN transmitting data stream, by described WLAN (wireless local area network) WLAN transmission all data streams;

Alternatively, after step 101, also comprise:

103, transmit a part of data flow by described WLAN (wireless local area network) WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow.

Step 102 and 103 can be according to actual conditions, optional one.

In an optional execution mode of the present invention, if described subscriber equipment support is simultaneously by described the second Access Network and described WLAN transmitting data stream, and described subscriber equipment determines and is merely able to transmit a part of data flow by described WLAN according to described access network discovery and selection strategy:

In an optional execution mode of the present invention, transmit a part of data flow described by described WLAN, and be switched to described the second Access Network, in the process by described second Access Network transmission another part data flow, comprising:

Described subscriber equipment is in the time that execution is switched to the handover execution stage of described the second Access Network from described the first Access Network, access network equipment to described the second Access Network sends handoff completion message, in described handoff completion message, be included in the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission; Or

Described subscriber equipment is in the time that execution is switched to the handoff preparation phase of described the second Access Network from described the first Access Network, send to switch to the described network equipment and prepare push-notification-answer message, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network.

In an optional execution mode of the present invention, if when described handoff completion message or described switching prepare to be also included in push-notification-answer message beared information corresponding to the data flow of described WLAN transmission; Transmit a part of data flow described by described WLAN, and be switched to described the second Access Network, in the process by described second Access Network transmission another part data flow, also comprise:

The embodiment of the present invention is in the time that subscriber equipment execution is switched to the second Access Network from the first Access Network of 3GPP communication system, according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmission all data streams, or transmit a part of data flow by described WLAN (wireless local area network) WLAN, be switched to described the second Access Network, and by described second Access Network transmission another part data flow.Can solve in prior art and exist: while switching between the different radio Access Network of UE in 3GPP network, cannot use the wlan network resource existing around, cause the problem of the waste of wlan network resource.

Further, in the time that the inadequate resource of the second Access Network causes handoff failure, or subscriber equipment is switched to after the second Access Network when quality of service declines, the embodiment of the present invention can be passed through WLAN transmitting data stream, improve the utilance of wlan network resource, ensure the quality of service of subscriber equipment, improved user's Experience Degree.

The signaling diagram of the WLAN (wireless local area network) shunt method that Fig. 2 provides for another embodiment of the present invention; As shown in Figure 2, suppose the E-UTRAN that the first Access Network (source Access Network) is 3GPP communication system, the second Access Network (target access network) is the UTRAN of 3GPP communication system, the network equipment of the first Access Network is called for short first network equipment, the network equipment of the second Access Network is called for short second network equipment, and the WLAN (wireless local area network) shunt method idiographic flow of the present embodiment comprises:

201, subscriber equipment detects the handover event that is switched to the second Access Network from the first Access Network, prepares to carry out to be switched to the second Access Network from the first Access Network.

When specific implementation, subscriber equipment can for example, according to the access network equipment of the first Access Network (evolution base station (evolved Node B, eNB) the handover event parameter detecting handover event that the measurement configuration parameter sending comprises, if the handover event that is switched to the second Access Network from the first Access Network detected, enter the preparation execution phase that is switched to the second Access Network from the first Access Network, prepare to carry out being switched to the second Access Network from the first Access Network.Or

The handover event parameter detecting handover event that the ANDSF strategy that subscriber equipment can send according to ANDSF functional entity comprises, if the handover event that is switched to the second Access Network from the first Access Network detected, enter the preparation execution phase that is switched to the second Access Network from the first Access Network, prepare to carry out being switched to the second Access Network from the first Access Network.

For example, in the time that subscriber equipment is communicated by letter by the first Access Network, because subscriber equipment moves or the variation of network condition, the signal that may occur first Access Network (being generally the Access Network that current area is used) of the current use of subscriber equipment is weaker than the signal of the second Access Network (being generally the Access Network that adjacent cell is used), thereby triggers subscriber equipment by the switching from the first Access Network to the second Access Network.If wireless access technology (the Radio Access Technology that the first Access Network and the second Access Network adopt, be called for short RAT) difference, this switching is called the handover event (Inter-RATHandover) between the inner different Access Networks of 3GPP, for example, switch to UTRAN by E-UTRAN.

It should be noted that, the handover event parameter detecting handover event that can provide according to ANDSF strategy in order to realize above-mentioned subscriber equipment, in the present embodiment, to the management object (ManagementObject of ANDSF strategy, be called for short MO) expand as follows: in ANDSF MO, increase handover event triggering node (EventTrigger Node), this handover event triggers in node and is preset with handover event parameter.Wherein, handover event parameter comprises event title and/or trigger parameter corresponding to this event title.For example event name is called between Access Network and switches (Inter-RAT Handover) or business return back to circuit handover network (CSFallback, CSFB), subscriber equipment is according to the trigger parameter of switching or CSFB between Access Network, switch or the trigger parameter of CSFB meets and between Access Network, switches or the occurrence condition of CSFB event when detecting between Access Network, can trigger handover event.

202, subscriber equipment, according to ANDSF strategy, determines that the priority of WLAN is higher than the priority of described the second Access Network.

In one embodiment, can expand as follows the MO of ANDSF:

On the basis of the access technology type WLAN comprising in access technology (Access Technology) parameter of existing ANDSF MO, increase new access technology type: 3GPP_EUTRAN, 3GPP_UTRAN, 3GPP_GERAN; Indicate precedence information by the Access Network priority in ANDSF MO (Access Network Priority) parameter, therefore, access technology (Access Technology) parameter that the present embodiment provides by ANDSF MO and Access Network priority (Access Network Priority) parameter, obtain 3GPP_EUTRAN, 3GPP_UTRAN, the precedence information between 3GPP_GERAN and WLAN.Alternatively, access cell ID (Access ID) in ANDSF MO or access in auxiliary cell ID (Secondary Access ID) parameter and also can increase new value, for example EUTRA_CI, UTRAN_CI, GERAN_CI, be used to indicate the specific cell that adopts the specific access technology of 3GPP, wherein, CI is cell ID (Cell ID).Thereby subscriber equipment can judge that whether WLAN priority is higher than the second Access Network according to ANDSF strategy.

Suppose that subscriber equipment detects around have available WLAN, and according to ANDSF strategy, determine that the priority of WLAN is higher than the priority of the second Access Network, subscriber equipment determines that initiating WLAN shunts.

If determining, subscriber equipment initiates WLAN shunting, further:

Suppose that subscriber equipment support is simultaneously by 3GPP and WLAN transmitting data stream, subscriber equipment need to be according to (the Inter-System Routing Policy of routing policy between the system of ANDSF, be called for short ISRP) determine which data flow is transmitted by WLAN, according to following Internet Protocol (Internet Protocol in ISRP, be called for short IP) the descriptor of data flow (flow), determine the data flow of transmitting by WLAN.If there is the data flow that cannot transmit by WLAN according to ISRP, subscriber equipment can be selected to switch to the second Access Network, transmit by the second Access Network.

Suppose that subscriber equipment do not support simultaneously by 3GPP and WLAN transmitting data stream stream, UE, according to shift strategy between the system of ANDSF (Inter-System Mobility Policy is called for short ISMP), can transmit all data streams by WLAN.

Suppose that subscriber equipment is according to ANDSF strategy, determine that the priority of WLAN is lower than the priority of the second Access Network, now, subscriber equipment need to report the network equipment (access network equipment of the first Access Network or equipment of the core network) by the measurement result of carrying out handover event detection according to handover event parameter, and carrying out the Inter-RAT HO process specifying in 3GPP standard, the present invention repeats no more the Inter-RAT HO process specifying in 3GPP standard.

203, carry out WLAN shunting, all data streams or partial data stream are transmitted by WLAN.

Here, data flow can be transmitted with the data flow form of following IP agreement.

Particularly, WLAN shunting be initiated and be carried out to subscriber equipment can to network according to the flow process of current 3GPP WLAN shunting correlation standard, by non-seamless shunting (Non-Seamless Offload) or seamless shunting (Seamless Offload, or title EPC routed) mode, all data streams or partial data stream are transmitted by WLAN.Wherein, the non-seamless data flow that splits into is directly by WLAN Access Network access business network; The seamless data flow that splits into accesses 3GPP core net by WLAN Access Network, and then is linked into business network by 3GPP core net.Here repeat no more.

If, for partial data stream is transmitted by WLAN, described method also comprises in step 203:

204, be switched to the second Access Network from the first Access Network, by second Access Network transmission another part data flow.

In this case, step 203 and 204 can be carried out simultaneously or successively, and the present invention is not construed as limiting this.

Suppose to carry out 204 in execution step 203, subscriber equipment need to report the measurement result of carrying out handover event detection according to handover event parameter the network equipment of the first Access Network, suppose that the first Access Network is the E-UTRAN of 3GPP, now, subscriber equipment need to report measurement result evolution base station (evolved Node B, be called for short eNB), initiate Inter-RAT HO process by eNB, detailed process can be with reference to the Inter-RAT HO process specifying in 3GPP standard.

It should be noted that, subscriber equipment need to, according to the traffic flow information that cannot transmit by WLAN of determining in step 202, be determined the beared information corresponding to data flow that need to be switched to the second Access Network.Concrete, subscriber equipment can flow corresponding beared information according to traffic flow template (Traffic Flow Template is called for short TFT) specified data.Wherein, in WLAN and the second Access Network, repeat transmission for fear of data flow, be switched to the process of the second Access Network from the first Access Network at subscriber equipment:

When subscriber equipment is in the time for example, initiating to switch to the second Access Network (UTRAN), the switching that subscriber equipment sends to the second Access Network completes (Handover to UTRAN Complete) message and comprises the beared information corresponding to data flow that need to be switched to the second Access Network, and does not comprise beared information corresponding to data transmitting by WLAN;

Or subscriber equipment, carrying out after described the first Access Network is switched to described the second Access Network, discharges the 3GPP communication resource corresponding with the data flow of transmitting by described WLAN in described the second Access Network; Particularly, subscriber equipment sends bearing modification or carrying releasing request to the network equipment of the second Access Network, or receive bearing modification or carrying releasing request from the network equipment of the second Access Network, wherein in bearing modification or carrying releasing request, carry the beared information corresponding with the data flow that is diverted to WLAN transmission, the 3GPP communication resource corresponding with the data flow that is diverted to WLAN transmission in the second Access Network is discharged, thereby can avoid the data flow of transmitting by WLAN in the second Access Network of 3GPP, to repeat transmission.Here the network equipment of the second Access Network comprises access network equipment and/or the equipment of the core network of the second Access Network.

Suppose to carry out 204 o'clock after execution step 203, after completing WLAN shunting, subscriber equipment can be connected and be upgraded or bearer update by initiation packet data flow network, the 3GPP communication resource corresponding to data flow that is diverted to WLAN transmission discharged, afterwards, continue to carry out follow-up Inter-RAT HO flow process according to 3GPP standard regulation again, until Inter-RAT HO completes, that is: the data flow that is not diverted to WLAN is switched in the second Access Network to be transmitted.So also avoid data flow in WLAN and the second Access Network, to repeat transmission.

The embodiment of the present invention is in the time that subscriber equipment execution is switched to the second Access Network from the first Access Network of 3GPP, according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmission all data streams, or transmit a part of data flow by described WLAN (wireless local area network) WLAN, be switched to described the second Access Network, and by described second Access Network transmission another part data flow.Can solve in prior art and exist: while switching between the different radio Access Network of UE in 3GPP network, cannot use the wlan network resource existing around, cause the problem of the waste of wlan network resource.

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Fig. 3 provides for one embodiment of the invention, as shown in Figure 3, the WLAN (wireless local area network) shunt method of the present embodiment can comprise:

301, first network equipment is switched to the handoff preparation phase of the second Access Network from the first Access Network at subscriber equipment, sends to switch prepare notification message to described subscriber equipment, and described switching prepares at least to comprise the second Access Network information in notification message.

Wherein, described first network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network, and described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network.Access network equipment for example comprises base station, Radio Access Controller etc., and equipment of the core network for example comprises mobile management entity MME, GPRS serving GPRS support node etc.

302, described subscriber equipment is according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow.

In an optional execution mode of the present invention, if when described first network equipment is the equipment of the core network of described the first Access Network, described first network equipment is after subscriber equipment sends switching preparation notification message, described subscriber equipment is according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, and determines while transmitting all data streams by described WLAN:

Subscriber equipment sends to switch to first network equipment prepares push-notification-answer message, and wherein, the traffic flow information that passes through the second Access Network transmission that switching preparation push-notification-answer message comprises is for empty; When first network equipment receives the switching preparation push-notification-answer message that described subscriber equipment sends; If the traffic flow information that passes through the second Access Network transmission comprising according to switching preparation push-notification-answer message is for empty, determine that the instruction of described switching preparation push-notification-answer message does not have data flow to be switched to described the second Access Network or transmits all data streams by described WLAN, send to switch to the access network equipment of described the first Access Network and prepare failed message, prepare unsuccessfully in order to the switching of notifying the access network equipment of described the first Access Network to be switched to described the second Access Network from described the first Access Network.

In an optional execution mode of the present invention, described first network equipment is after subscriber equipment sends switching preparation notification message, described subscriber equipment is according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, and determine and transmit a part of data flow by described WLAN, and be switched to described the second Access Network, during by described second Access Network transmission another part data flow:

The embodiment of the present invention is in the time that subscriber equipment execution is switched to the second Access Network from the first Access Network of 3GPP communication system inside, according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmission all data streams, or transmit a part of data flow by described WLAN (wireless local area network) WLAN, be switched to described the second Access Network, and by described second Access Network transmission another part data flow.Can solve in prior art and exist: while switching between the different radio Access Network of UE in 3GPP network, cannot use the wlan network resource existing around, cause the problem of the waste of wlan network resource.

The signaling diagram of the WLAN (wireless local area network) shunt method that Fig. 4 provides for another embodiment of the present invention; Suppose the E-UTRAN that the first Access Network (source Access Network) is 3GPP, the UTRAN that the second Access Network (target access network) is 3GPP, the WLAN (wireless local area network) shunt method idiographic flow of the present embodiment comprises:

401, first network equipment initiates subscriber equipment to be switched to the handover event of the second Access Network from the first Access Network, or detects that subscriber equipment is switched to the handover event of the second Access Network from the first Access Network.

Wherein, first network equipment is the network equipment of the first Access Network, comprises access network equipment and/or the equipment of the core network of the first Access Network.

When specific implementation, described first network equipment can be the MME of the first Access Network, suppose the E-UTRAN that the first Access Network (source Access Network) is 3GPP, the eNB of the first Access Network is to mobile management entity (the Mobility Management Entity of the first Access Network, be called for short MME) transmission handover request (Handover Required) message, request MME for example, to radio network controller (the Radio Network Controller of the second Access Network (UTRAN), be called for short RNC), general packet radio service (the General Packet Radio Service of the second Access Network, be called for short GPRS) serving GPRS support node (Serving GPRS Support Node, be called for short SGSN) and gateway (the Serving Gateway of the second Access Network, being called for short S-GW) request sets up resource.

MME for example, determines that according to the mark (, RNC mark) of the second Access Network in handover request (Handover Required) message this switching type is Inter-RAT Handover, and is switched to UTRAN network.

402, first network equipment sends to switch to subscriber equipment and prepares notification message.

When specific implementation, first network equipment (for example MME) sends to switch to subscriber equipment prepares notification message, wherein carrying new notice indicated value shows will or carried out to the Inter-RAT Handover set-up procedure of UTRAN by E-UTRAN, switch wireless access technology (Radio Access Technology the is called for short RAT) type (for example UTRAN) of preparing to carry in notification message the second Access Network.Wherein, switch preparation notification message and can adopt for example Inter-RAT Handover preparation message of existing message, or adopt the message of new definition, for example Handover Preparation Notification, Handover preparation Request, the message such as ForwardLocation Request.

403, subscriber equipment, according to ANDSF strategy, determines that the priority of WLAN is higher than the priority of the second Access Network.

Specific implementation can, with reference to the associated description of middle step 202 embodiment illustrated in fig. 2, repeat no more.

404, carry out WLAN shunting, all data streams or partial data stream are transmitted by WLAN.

Suppose that subscriber equipment support is simultaneously by 3GPP and WLAN transmitting data stream, subscriber equipment can transmit all data streams or partial data stream by WLAN.

Suppose that subscriber equipment do not support simultaneously by 3GPP and WLAN transmitting data stream stream, subscriber equipment is according to (the Inter-System Mobility Policy of shift strategy between the system of ANDSF, be called for short ISMP), determine all data streams is transmitted by WLAN.

When subscriber equipment transmits all data streams or partial data stream by WLAN, this subscriber equipment can send to switch to first network equipment (as MME) prepares push-notification-answer message, specifically can adopt for example Notification Response/Answer, or Handover PreparationNotification Response, or Handover Preparation Response, or the message such as ForwardLocation Response, wherein, switch preparation push-notification-answer message and comprise beared information corresponding to data flow that need to carry out Inter-RAT Handover (by the second Access Network transmission), for example grouped data flow network (Packet Data Network, be called for short PDN) connection identifier (connectionID), grouping system (the Evolved Packet System of evolution, be called for short EPS) bearing identification (bearerID) etc.Further, switch and prepare can also comprise beared information corresponding to data flow transmitting by WLAN in push-notification-answer message, comprise PDN connection ID (s), EPS bearer ID (s) etc., now need to indicate these data flow and transmit by WLAN.Suppose that subscriber equipment transmits all data streams by WLAN, beared information corresponding to data flow that passes through the second Access Network transmission that subscriber equipment can be prepared the switching that sends to first network equipment (as MME) to carry in push-notification-answer message is made as sky (NULL).

Push-notification-answer message is prepared in the switching that first network equipment sends according to subscriber equipment, determines which data flow need to carry out Inter-RAT HO, is switched to the second Access Network (UTRAN) and transmits.

Transmit (being that all data streams is all transmitted by WLAN) if do not have data flow need to be switched to the second Access Network (UTRAN), first network equipment is ended Inter-RAT HO set-up procedure.Now, first network equipment sends to switch to subscriber equipment and prepares unsuccessfully (Handover PreparationFailure) message.Switch and prepare can carry failure reason value in failed message, as WLAN offloadperformed or Handover Target not allowed, switch and prepare failed reason in order to instruction.

Alternatively, suppose in step 404 that, for a part of data flow is transmitted by WLAN, another part data flow is transmitted by the second Access Network (UTRAN), in execution step 404 or also comprise afterwards:

405, be switched to the second Access Network from the first Access Network, by second Access Network transmission another part data flow.

When specific implementation, for example, first network equipment (as MME) sends handover request message to another network equipment (as SGSN), wherein, another network equipment is the network equipment of the second Access Network, comprise access network equipment and/or the equipment of the core network of the second Access Network, handover request message is specifically as follows and forwards re-positioning request (Forward Relocation Request) message, in order to trigger the handover resource allocation procedure of the second Access Network.Wherein, forward RELOCATION REQUEST message and comprise the beared information corresponding to data flow that need to transmit by the second Access Network, and do not comprise the beared information corresponding to data flow that need to transmit by WLAN.Concrete, comprise PDN connection ID (s), EPS bearer ID (s) etc. by the beared information corresponding to data flow of the second Access Network transmission.Afterwards, continue to carry out Inter-RAT Handover preparation (switch and prepare) and Handoverexecution (switch and carry out) process according to existing 3GPP standard, until complete the process of Inter-RAT Handover.That is: the data flow that is not diverted to WLAN is switched in the second Access Network to be transmitted.

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Fig. 5 provides for one embodiment of the invention, as shown in Figure 5, the WLAN (wireless local area network) shunt method of the present embodiment can comprise:

501,, when the switching that second network equipment is switched to the second Access Network at subscriber equipment from the first Access Network is prepared unsuccessfully, send to switch to described subscriber equipment and prepare failed message.

Wherein, described switching preparation failed message comprises described the second Access Network information.

Wherein, described second network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network, and described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network.Access network equipment for example comprises base station, Radio Access Controller etc., and equipment of the core network for example comprises mobile management entity MME, GPRS serving GPRS support node etc.

When subscriber equipment is in the handoff preparation phase that is switched to the second Access Network from the first Access Network, may cannot distribute enough switchable resources to cause switching to prepare unsuccessfully due to the second Access Network time, second network equipment sends to switch to described subscriber equipment prepares failed message, and described switching prepares at least to comprise described the second Access Network information in failed message.Wherein, described switching preparation failed message is prepared unsuccessfully in order to the switching of notifying described subscriber equipment to be switched to the second Access Network from the first Access Network.

502, described subscriber equipment, according to described access network discovery and selection strategy, if the priority of definite WLAN is higher than the priority of described the second Access Network, transmits described data flow by described WLAN (wireless local area network) WLAN.

In order to ensure the quality of service of subscriber equipment, after subscriber equipment receives and switches preparation failed message, according to described access network discovery and selection strategy, if the priority of definite WLAN is higher than the priority of described the second Access Network, described data flow is transmitted by described WLAN (wireless local area network) WLAN.Specific implementation can, with reference to the associated description of middle step 202 embodiment illustrated in fig. 2, repeat no more.

When the switching that the embodiment of the present invention is switched to the second Access Network at subscriber equipment from the first Access Network of 3GPP communication system inside is prepared unsuccessfully, failed message is prepared in the switching that subscriber equipment can send according to the network equipment, according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmitting data stream.Can solve in prior art and exist: while switching between the different radio Access Network of UE in 3GPP network, cannot use the wlan network resource existing around, cause the problem of the waste of wlan network resource.Improve the utilance of wlan network resource, ensured the quality of service of subscriber equipment, improved user's Experience Degree.

The signaling diagram of the WLAN (wireless local area network) shunt method that Fig. 6 provides for another embodiment of the present invention; Suppose the E-UTRAN that the first Access Network (source Access Network) is 3GPP, the UTRAN that the second Access Network (target access network) is 3GPP, second network equipment is the network equipment of the first Access Network, the network equipment of the second Access Network is called for short another network equipment, as shown in Figure 6, the WLAN (wireless local area network) shunt method idiographic flow of the present embodiment comprises:

601, second network equipment initiates to be switched to from the first Access Network the handover event of the second Access Network.When specific implementation, can be with reference to the associated description in step 401 embodiment illustrated in fig. 4.

602, second network equipment sends to switch to subscriber equipment and prepares failed message.

Suppose to be switched at the first Access Network the switching set-up procedure failure of the second Access Network, for example, because the second Access Network (UTRAN) cannot distribute enough switchable resources.Second network equipment (as MME) sends to switch to subscriber equipment prepares failed message, represents the Inter-RATHandover set-up procedure failure to UTRAN by E-UTRAN.Switch the RAT type (as UTRAN) of carrying the second Access Network in preparation failed message, can also carry failure reason value, as Handover Failure In Target System or Handover Target not allowed.

Wherein, switching preparation failed message can be notice (Notification) message, wherein carry new notice indicated value and show the Inter-RAT Handover set-up procedure failure to UTRAN by E-UTRAN, for example Inter-RAT Handover preparation failure; Or the message that failed message can be a new definition, the message such as for example Handover Preparation Failure Notification, or Handoverpreparation Failure are prepared in switching.

603, subscriber equipment, according to ANDSF strategy, determines that the priority of WLAN is higher than the priority of the second Access Network.

604, carry out WLAN shunting, all data streams or partial data stream are transmitted by WLAN.

Suppose that subscriber equipment transmits partial data stream by WLAN, when another part data flow can not be transmitted by WLAN, subscriber equipment can discharge the data flow that can not transmit by WLAN, maybe this data flow that can not transmit by WLAN is transmitted by the Access Network of other 3GPP, or continue by the first Access Network (source Access Network) transmission, the data flow that this part can not be transmitted by WLAN may be released owing to losing source the first Access Network signal covering.

The present embodiment, in the time that the inadequate resource of the second Access Network causes handoff failure, can be shunted transmitting data stream by WLAN, has improved the utilance of wlan network resource, has ensured the quality of service of subscriber equipment, has improved user's Experience Degree.

The structural representation of the subscriber equipment that Fig. 7 provides for another embodiment of the present invention; As shown in Figure 7, comprising:

Determination module 71, be used in the handoff preparation phase that is switched to the second Access Network from the first Access Network, according to access network discovery and selection strategy, determine that the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network;

Transport module 72, for transmitting all data streams by described WLAN, or transmits a part of data flow by described WLAN, and is switched to described the second Access Network, by described second Access Network transmission another part data flow.

For instance, before being switched to the handoff preparation phase of the second Access Network from the first Access Network, described subscriber equipment also comprises:

Detection module 73, for carrying out handover event detection according to handover event parameter, and in the time handover event being detected, prepares to carry out being switched to described the second Access Network from described the first Access Network; Or

The first receiver module 74, the switching preparation notification message sending for receiving described first network equipment, described switching prepares at least to comprise the second Access Network information in notification message, be switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network, described first network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network.

For instance, before described detection module carries out handover event detection according to handover event parameter; Described detection module 73 also comprises:

The first receiving element 731, the described access network discovery and the selection strategy that also send for receiving access network discovery and selection functional entity, described access network discovery and selection strategy comprise described handover event parameter; Or the measurement configuration parameter sending for receiving the access network equipment of described the first Access Network, described measurement configuration parameter comprises described handover event parameter.

For instance, the precedence information between described access network discovery wireless access network and the described WLAN (wireless local area network) WLAN inner different from also comprising described 3GPP in selection strategy.

For instance, described transport module 72, specifically for not supporting at described subscriber equipment simultaneously by described the second Access Network and described WLAN transmitting data stream, by described WLAN (wireless local area network) WLAN transmission all data streams.

For instance, described transport module 72 specifically for:

If described subscriber equipment support is simultaneously by described the second Access Network and described WLAN transmitting data stream, and determine and be merely able to transmit a part of data flow by described WLAN according to described access network discovery and selection strategy, when transmitting a part of data flow by described WLAN, carry out and be switched to described the second Access Network from described the first Access Network, by described second Access Network transmission another part data flow; Or

For instance, transmit a part of data flow at described transport module 72 by described WLAN, and be switched to described the second Access Network, in the process by described second Access Network transmission another part data flow; Described transport module 72 also comprises:

The first transmitting element 721, for in the time that execution is switched to the handover execution stage of described the second Access Network from described the first Access Network, access network equipment to described the second Access Network sends handoff completion message, in described handoff completion message, be included in the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission; Or,

The second transmitting element 722, also in the time that execution is switched to the handoff preparation phase of described the second Access Network from described the first Access Network, send to switch to described first network equipment and prepare push-notification-answer message, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network.

For instance, if when described handoff completion message or described switching prepare to be also included in push-notification-answer message beared information corresponding to the data flow of described WLAN transmission; Described transport module 72 also comprises:

Releasing unit 732, for carrying out after described the first Access Network is switched to described the second Access Network, discharges the 3GPP communication resource corresponding with the data flow of transmitting by described WLAN in described the second Access Network.

The structural representation of the subscriber equipment that Fig. 8 provides for another embodiment of the present invention; As shown in Figure 8, subscriber equipment comprises processor, memory and communication bus, and described memory comprises the instruction that realizes WLAN (wireless local area network) shunt method, and described memory is connected with processor by communication bus.Further, all right communication interface of subscriber equipment, for example, by described communication interface and other network element devices (network equipment) communication connection.

In the time that processor is transferred the instruction that realizes WLAN (wireless local area network) shunt method in memory, can carry out following steps:

In the handoff preparation phase that is switched to the second Access Network from the first Access Network, according to access network discovery and selection strategy, determine that the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network;

For instance, before being switched to the handoff preparation phase of the second Access Network from the first Access Network, comprising:

Carry out handover event detection according to handover event parameter, and in the time handover event being detected, prepare to carry out being switched to described the second Access Network from described the first Access Network; Or

Receive the switching preparation notification message that first network equipment sends, described switching prepares at least to comprise the second Access Network information in notification message, be switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network, described first network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network.

For instance, before carrying out handover event detection according to handover event parameter, comprising:

Receive described access network discovery and selection strategy that access network discovery and selection functional entity send, described access network discovery and selection strategy comprise described handover event parameter; Or

The measurement configuration parameter that receives the access network equipment transmission of described the first Access Network, described measurement configuration parameter comprises described handover event parameter.

For instance, described by described WLAN transmission all data streams, comprising:

For instance, describedly transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow, comprising:

When transmitting a part of data flow by described WLAN, carry out and be switched to described the second Access Network from described the first Access Network, by described second Access Network transmission another part data flow;

Or, after transmitting a part of data flow by described WLAN, discharge the 3GPP communication resource corresponding with the data flow of transmitting by described WLAN in described the first Access Network, carry out and be switched to described the second Access Network from described the first Access Network, and by described second Access Network transmission another part data flow.

For instance, transmit a part of data flow described by described WLAN, and be switched to described the second Access Network, in the process by described second Access Network transmission another part data flow, comprising:

Described subscriber equipment is in the time that execution is switched to the handover execution stage of described the second Access Network from described the first Access Network, access network equipment to described the second Access Network sends handoff completion message, in described handoff completion message, be included in the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission;

Or, described subscriber equipment is in the time that execution is switched to the handoff preparation phase of described the second Access Network from described the first Access Network, send to switch to described first network equipment and prepare push-notification-answer message, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network.

For instance, if when described handoff completion message or described switching prepare to be also included in push-notification-answer message beared information corresponding to the data flow of described WLAN transmission;

The structural representation of the network equipment that Fig. 9 provides for another embodiment of the present invention; Be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, as shown in Figure 9, the described network equipment comprises:

Sending module 91, for be switched to the handoff preparation phase of the second Access Network from the first Access Network at subscriber equipment, send to switch to described subscriber equipment and prepare notification message, described switching prepares at least to comprise the second Access Network information in notification message, so that described subscriber equipment is according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow.

For instance, if when the described network equipment is the equipment of the core network of described the first Access Network, after sending switching preparation notification message to subscriber equipment at sending module 91; The described network equipment also comprises:

Receiver module 92, the switching preparation push-notification-answer message sending for receiving described subscriber equipment;

Determination module 93, for determining that the instruction of described switching preparation push-notification-answer message does not have data flow to be switched to described the second Access Network or transmits all data streams by described WLAN;

Described sending module 91, also sends to switch for the access network equipment to described the first Access Network and prepares failed message, prepares unsuccessfully in order to the switching of notifying the access network equipment of described the first Access Network to be switched to described the second Access Network from described the first Access Network.

For instance, after sending switching preparation notification message to subscriber equipment at described sending module 91;

Described receiver module 92, the switching preparation push-notification-answer message also sending for receiving described subscriber equipment, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network;

Described sending module 91, also prepare for the switching receiving according to described receiver module 91 beared information corresponding to data flow that will transmit at described the second Access Network that push-notification-answer message comprises, send handover request message to another network equipment, described handover request message comprises will be at the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission, described another network equipment comprises access network equipment and/or the equipment of the core network of the second Access Network.

The structural representation of the network equipment that Figure 10 provides for another embodiment of the present invention, be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, as shown in figure 10, the described network equipment comprises: processor, memory and communication bus, described processor is connected with memory by communication bus, in described memory, preserve the instruction that realizes WLAN (wireless local area network) shunt method, further, the described network equipment also comprises communication interface, for example, by communication interface and other network element devices (subscriber equipment) communication connection.

Be switched to the handoff preparation phase of the second Access Network from the first Access Network at subscriber equipment, send to switch to described subscriber equipment and prepare notification message, described switching prepares at least to comprise the second Access Network information in notification message, so that described subscriber equipment is according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow.

For instance, if when the described network equipment is the equipment of the core network of described the first Access Network, send switching preparation notification message to subscriber equipment after, comprising:

Receive the switching preparation push-notification-answer message that described subscriber equipment sends;

If determining described switching prepares the instruction of push-notification-answer message and does not have data flow to be switched to described the second Access Network or transmit all data streams by described WLAN; Send to switch to the access network equipment of described the first Access Network and prepare failed message, prepare unsuccessfully in order to the switching of notifying the access network equipment of described the first Access Network to be switched to described the second Access Network from described the first Access Network.

For instance, send switching preparation notification message to subscriber equipment after, comprising:

Receive the switching preparation push-notification-answer message that described subscriber equipment sends, described switching is prepared push-notification-answer message and is comprised the beared information corresponding to data flow that will transmit at described the second Access Network;

Prepare according to the switching receiving the beared information corresponding to data flow that will transmit at described the second Access Network that push-notification-answer message comprises, send handover request message to another network equipment, described handover request message comprises will be at the beared information corresponding to data flow of described the second Access Network transmission, not included in the beared information corresponding to data flow of described WLAN transmission, described another network equipment comprises access network equipment and/or the equipment of the core network of the second Access Network.

The structural representation of the network equipment that Figure 11 provides for another embodiment of the present invention; Be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, as shown in figure 11, comprising:

Sending module 10, while preparing unsuccessfully for the switching that is switched to the second Access Network from the first Access Network at subscriber equipment, send to switch to described subscriber equipment and prepare failed message, described switching prepares at least to comprise described the second Access Network information in failed message, so that described subscriber equipment is according to described access network discovery and selection strategy, if determine, the priority of WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmission all data streams.

When the switching that the embodiment of the present invention is switched to the second Access Network at subscriber equipment from the first Access Network of 3GPP communication system inside is prepared unsuccessfully, failed message is prepared in the switching that subscriber equipment can send according to the network equipment, according to access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmission all data streams.Can solve in prior art and exist: while switching between the different radio Access Network of UE in 3GPP network, cannot use the wlan network resource existing around, cause the problem of the waste of wlan network resource.Improve the utilance of wlan network resource, ensured the quality of service of subscriber equipment, improved user's Experience Degree.

The structural representation of the network equipment that Figure 12 provides for another embodiment of the present invention, be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, as shown in figure 12, the described network equipment comprises: processor, memory and communication bus, described processor is connected with memory by communication bus, in described memory, preserve the instruction that realizes WLAN (wireless local area network) shunt method, further, the described network equipment also comprises communication interface, for example, by communication interface and other network element devices (subscriber equipment) communication connection.

When the switching that is switched to the second Access Network from the first Access Network at subscriber equipment is prepared unsuccessfully, send to switch to described subscriber equipment and prepare failed message, described switching prepares at least to comprise described the second Access Network information in failed message, so that described subscriber equipment is according to described access network discovery and selection strategy, if determine, the priority of WLAN is higher than the priority of described the second Access Network, by described WLAN (wireless local area network) WLAN transmission all data streams.

The structural representation of the WLAN (wireless local area network) separate system that Figure 13 provides for another embodiment of the present invention, as shown in figure 13, comprising: subscriber equipment 31, the network equipment 32, access network discovery and selection functional entity 33;

Described subscriber equipment 31 is Fig. 7 or described subscriber equipment embodiment illustrated in fig. 8, associated content reference Fig. 7 of subscriber equipment 31 or embodiment illustrated in fig. 8 in associated description, repeat no more;

The described network equipment 32 can be Fig. 9 or the described network equipment embodiment illustrated in fig. 10, or is Figure 11 or the described network equipment embodiment illustrated in fig. 12; Associated content reference Fig. 9 of the network equipment 32 or the described network equipment embodiment illustrated in fig. 10, or with reference to the associated description in Figure 11 or the described network equipment embodiment illustrated in fig. 12, repeat no more.

Wherein, the described network equipment 31 comprises access network equipment and/or the equipment of the core network of described the first Access Network, access network equipment for example comprises base station, Radio Access Controller etc., and equipment of the core network for example comprises mobile management entity MME, GPRS serving GPRS support node etc.

Described access network discovery and selection functional entity 33, for sending access network discovery and selection strategy to described subscriber equipment, described access network discovery comprises the precedence information between wireless access network and the described WLAN (wireless local area network) WLAN that described 3GPP communication system is inner different from selection strategy, so that described subscriber equipment is according to carrying out the handoff preparation phase that is switched to described the second Access Network from described the first Access Network, according to access network discovery and selection strategy, if determine, the priority of described WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams, or transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow.

Described access network discovery and selection functional entity 33, also for sending described access network discovery and selection strategy to described subscriber equipment, in described access network discovery and selection strategy, also comprise handover event parameter, so that subscriber equipment 31 is according to handover event parameter detecting handover event.

The schematic flow sheet of the WLAN (wireless local area network) shunt method that Figure 14 provides for another embodiment of the present invention, as shown in figure 14, comprising:

1401, subscriber equipment receives the switching preparation failed message that second network equipment sends, described switching is prepared at least to comprise the second Access Network information in failed message, is prepared unsuccessfully in order to the switching of notifying described subscriber equipment to be switched to described the second Access Network from described the first Access Network;

1402, according to described access network discovery and selection strategy, if determine, the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network, by described WLAN transmission all data streams;

Step 1402 specific implementation can be with reference to the related content in embodiment illustrated in fig. 1.

Wherein, described second network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network, and described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network.

The structural representation of the subscriber equipment that Figure 15 provides for another embodiment of the present invention, as shown in figure 15, comprising:

Receiver module 1501, the switching preparation failed message sending for receiving second network equipment, described switching is prepared at least to comprise the second Access Network information in failed message, is prepared unsuccessfully in order to the switching of notifying described subscriber equipment to be switched to described the second Access Network from described the first Access Network;

Determination module 1502, for according to described access network discovery and selection strategy, determines that the priority of WLAN (wireless local area network) WLAN is higher than the priority of described the second Access Network;

Transport module 1503, for transmitting all data streams by described WLAN;

In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, when actual realization, can have other dividing mode, for example multiple unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.

The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.

In addition, the each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that also can adopt hardware to add SFU software functional unit realizes.

The integrated unit that the above-mentioned form with SFU software functional unit realizes, can be stored in a computer read/write memory medium with the form of code.Above-mentioned code storage, in a computer-readable recording medium, comprises that some instructions are with so that processor or hardware circuit are carried out the part or all of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: the miniature high power capacity mobile storage disc without phisical drive of USB (universal serial bus), portable hard drive, read-only memory (English: Read-Only Memory, be called for short ROM), the various media that can be program code stored such as random access memory (English: Random AccessMemory, be called for short RAM), magnetic disc or CD.

Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the protection range of various embodiments of the present invention technical scheme.

Claims

1. a WLAN (wireless local area network) shunt method, is characterized in that, comprising:

2. method according to claim 1, is characterized in that, before described subscriber equipment is switched to the handoff preparation phase of the second Access Network from the first Access Network, also comprises:

3. method according to claim 2, is characterized in that, before described subscriber equipment carries out handover event detection according to handover event parameter, also comprises:

4. according to the method described in claim 1-3 any one, it is characterized in that the precedence information between described access network discovery wireless access network and the described WLAN (wireless local area network) WLAN inner different from also comprising described 3GPP communication system in selection strategy.

5. according to the method described in claim 1-4 any one, it is characterized in that, described by described WLAN transmission all data streams, comprising:

6. according to the method described in claim 1-4 any one, it is characterized in that, describedly transmit a part of data flow by described WLAN, and be switched to described the second Access Network, by described second Access Network transmission another part data flow, comprising:

7. method according to claim 2, is characterized in that, transmits a part of data flow described by described WLAN, and is switched to described the second Access Network, in the process by described second Access Network transmission another part data flow, comprising:

8. method according to claim 7, is characterized in that, if when described handoff completion message or described switching prepare to be also included in push-notification-answer message beared information corresponding to the data flow of described WLAN transmission,

9. a WLAN (wireless local area network) shunt method, is characterized in that, comprising:

10. a subscriber equipment, is characterized in that, comprising:

11. subscriber equipmenies according to claim 10, is characterized in that, before being switched to the handoff preparation phase of the second Access Network from the first Access Network, described subscriber equipment also comprises:

The first receiver module, for before described determination module is switched to the handoff preparation phase of the second Access Network from the first Access Network, receive the switching preparation notification message that first network equipment sends, described switching prepares at least to comprise the second Access Network information in notification message, be switched to described the second Access Network in order to indicate described subscriber equipment to prepare to carry out from described the first Access Network, described first network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network.

12. subscriber equipmenies according to claim 11, is characterized in that, described detection module comprises:

13. according to the arbitrary described subscriber equipment of claim 10-12, it is characterized in that the precedence information between described access network discovery wireless access network and the described WLAN (wireless local area network) WLAN different with also comprising described 3GPP inside in selection strategy.

14. according to the subscriber equipment described in claim 10-13 any one, it is characterized in that, described transport module, specifically for not supporting at described subscriber equipment simultaneously by described the second Access Network and described WLAN transmitting data stream, by described WLAN (wireless local area network) WLAN transmission all data streams.

15. according to the subscriber equipment described in claim 10-13 any one, it is characterized in that, described transport module specifically for:

16. subscriber equipmenies according to claim 11, is characterized in that, described transport module comprises:

17. subscriber equipmenies according to claim 16, it is characterized in that, if described handoff completion message or described switching prepare to be also included in push-notification-answer message the beared information corresponding to data flow of described WLAN transmission, during not included in beared information corresponding to the data flow of described WLAN transmission, described transport module also comprises:

18. 1 kinds of subscriber equipmenies, is characterized in that, comprising:

Transport module, for transmitting all data streams by described WLAN;

19. 1 kinds of WLAN (wireless local area network) shunt methods, is characterized in that, comprising:

20. methods according to claim 19, is characterized in that, described first network equipment, after subscriber equipment sends switching preparation notification message, also comprises:

21. 1 kinds of WLAN (wireless local area network) shunt methods, is characterized in that, comprising:

22. 1 kinds of network equipments, be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, it is characterized in that, comprising:

23. network equipments according to claim 22, is characterized in that, after sending switching preparation notification message to subscriber equipment at described sending module;

24. 1 kinds of network equipments, be positioned at the first Access Network side, the described network equipment comprises equipment of the core network and/or the access network equipment of described the first Access Network, described the first Access Network is the wireless access network that 3G (Third Generation) Moblie partnership projects 3GPP communication system is inner different with described the second Access Network, it is characterized in that, comprising:

25. 1 kinds of WLAN (wireless local area network) separate systems, is characterized in that, comprising: subscriber equipment, the network equipment, access network discovery and selection functional entity;

Described subscriber equipment is the subscriber equipment as described in claim 10-18 any one;

The described network equipment is the network equipment as described in claim 22-23 any one, or is the network equipment as claimed in claim 24;

26. systems according to claim 25, is characterized in that, the described network equipment comprises access network equipment and/or the equipment of the core network of described the first Access Network.

27. according to the system described in claim 25 or 26, it is characterized in that, also comprises handover event parameter in described access network discovery and selection strategy.