CN104902519A

CN104902519A - Notification method of communication terminal state, device, access point, terminal and network element

Info

Publication number: CN104902519A
Application number: CN201410080968.XA
Authority: CN
Inventors: 陈卓
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2014-03-06
Filing date: 2014-03-06
Publication date: 2015-09-09

Abstract

The invention provides a notification method of communication terminal state, a device, an access point, a terminal and a network element, wherein the notification method comprises the steps as follows: a first judging step: judging whether a communication terminal is switched to WLAN from a cellular network to obtain a first judging result; a first transmitting step: transmitting a first message to a first target network element in the cellular network when the first judging result instructs that the communication terminal is switched to the WLAN from the cellular network so that the cellular network could know the state of the communication terminal is switched to WLAN from the cellular network. By using the technical solution provided by the invention, the notification method, the device, the access point, the terminal and the network element of the invention can be used for transmitting message to the cellular network after the communication terminal intends to leave the cellular network or accesses in the WLAN network so that the cellular network could know the state of the communication terminal is switched to WLAN from the cellular network to solve the problem that the behavior of the cellular network to the communication terminal is unpredictable to lead to possible error handling.

Description

The Notification Method of communication terminal state, device, access point, terminal and network element

Technical field

The present invention relates to the communications field, particularly relate to a kind of Notification Method of communication terminal state, device, access point, terminal and network element.

Background technology

WLAN (wireless local area network) WLAN is operated in 2.4G exempts from licensed band owing to having, and equipment cost is cheap, is easy to dispose, data rate advantages of higher, has been considered to the important means shunting cellular network traffic.Wlan network is utilized to shunt cellular network traffic, especially the value traffic such as shunting net page browsing, QQ, msn or large files download contour consumption flow business, effectively can alleviate cellular network burden, and improve in-door covering, high-peed connection is provided, thus promotes user's experience.

Current WLAN/3GPP is wireless, and interoperability enters at 3GPP RAN2, ites is desirable to do necessary enhancing and optimization to the bridging technology between cellular network and WLAN.Wherein, a main technical need is, the WIFI(Wireless Fidelity optimized, Wireless Fidelity) unloading (Offloading) solution should be able to make operator strengthen the management of WLAN and control, and operator will consider the situation of WLAN when the resource management doing cellular network; On the other hand, for cellular network and WLAN, all need to select to strengthen to the mobility of Access Network and network, as considered UE(User Equipment, subscriber equipment) the information such as radio link quality, return link quality and load.

During bridging technology between cellular network and WLAN is optimized, the key technical problem that needs solve is: how UE selects suitable network to carry out bearer service, and especially, how UE selects the business of suitable wlan network to cellular network to shunt.For this problem, the technical scheme of current proposition mainly contains following three kinds:

The first technical scheme: network issues the supplementarys such as network signal thresholding (as signal strength signal intensity), UE decision-making select network voluntarily.This scheme had both been applicable to the communication terminal of Idle state, was also applicable to the communication terminal of connected state.

The second technical scheme: network issues the supplementarys such as network signal thresholding (as signal strength signal intensity), and formulates the criterion of network selection, UE binding signal quality also performs network selection according to network selection criterion.This scheme had both been applicable to the communication terminal of Idle state, was also applicable to the communication terminal of connected state.

The third technical scheme: rely on cellular network instruction decision-making, that is, UE reports the information such as network signal thresholding (as signal strength signal intensity) and load of WLAN, come for UE selects wlan network by the information such as signal quality, network load of cellular network side according to communication terminal type, QoS (QoS) demand and two nets, and notify UE by instruction message.This scheme is only applicable to the communication terminal of connected state.

In the first technical scheme above-mentioned and the second technical scheme, when communication terminal meets network signal thresholding, communication terminal can be selected to be linked into wlan network.But now, cellular network may and do not known communication terminal to have left cellular network voluntarily and accessed WLAN.This behavior of communication terminal, can cause network can not expect to communication terminal behavior.

If communication terminal leaves cellular network voluntarily from connected state and accesses WLAN, then can bring following problem to cellular network:

(1) cellular network base station may think by mistake the Cellular Networks wireless signal of UE bad/interrupt, now network there will be misjudgement;

(2) cellular network base station also may recover wireless link at wait UE, and now Internet resources are consumed in vain;

(3) cellular network base station can retain the context of UE, and this can waste the Storage and Processing resource of base station;

(4) cellular network likely can attachment removal (Detach) user, and cause UE unreachable, now, network there will be misjudgement.

If communication terminal leaves cellular network voluntarily from Idle state and accesses WLAN, then can bring following problem to cellular network:

When cellular network needs page communication terminal, (communication terminal has accessed wlan network to find may not have response by communication terminal, no longer monitor cellular network), now, network can be caused to think, and communication terminal UE is unreachable, and then, may attachment removal user, that is, may there is misjudgement in network.

Namely in the first technical scheme existing and the second technical scheme, all there is a common problem: when communication terminal satisfies condition, leave voluntarily from cellular network and after accessing wlan network, erroneous judgement can be caused to cellular network.Thus, Cellular Networks, to the behavior of communication terminal, by unpredictable, can cause possible error handle.

Summary of the invention

In order to solve the problems of the technologies described above, the invention provides a kind of Notification Method of communication terminal state, device, access point, terminal and network element, can communication terminal prepare to exit cellular network or access wlan network after, message is sent in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

To achieve these goals, provide a kind of Notification Method of communication terminal state, for the access point in WLAN, described Notification Method comprises: the first determining step: judge whether communication terminal is switched to WLAN from cellular network, obtain the first judged result; First forwarding step: when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, send the first message to the first object network element in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described first object network element is packet data gateway PDN-GW, mobile management entity MME or base station.

Preferably, described first object network element is PDN-GW, and described first forwarding step comprises: when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, the identity information of obtaining communication terminal in described cellular network; Described first message of carrying described identity information is sent to described PDN-GW, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

Preferably, described first object network element is MME or base station, and described first forwarding step comprises: when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, the identity information of obtaining communication terminal in described cellular network; According to MME corresponding in described identity information determination cellular network or base station; To MME or described first message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described identity information is that the unique interim UE in the whole world identifies GUTI, interim identity S-TMSI or Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI.

Present invention also offers a kind of Notification Method of communication terminal state, for a communication terminal, described Notification Method comprises: the second determining step: judge that communication terminal is the need of being switched to WLAN or whether being switched to WLAN from cellular network from cellular network, obtain a judged result; Second forwarding step: when judged result indicates described communication terminal to need be switched to WLAN from cellular network or be switched to WLAN from cellular network, send the second message, cellular network can be determined and the state recording described communication terminal for be switched to WLAN from cellular network.

Preferably, when described communication terminal is switched to WLAN from cellular network, described Notification Method also comprises: obtain the identity information of described communication terminal in described cellular network; Second forwarding step is specially: sent second message of carrying described identity information to PDN-GW by access point, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

Preferably, when described communication terminal is switched to WLAN from cellular network, described Notification Method also comprises: the identity information of obtaining communication terminal in described cellular network; Second forwarding step is specially: send the 3rd message of carrying described identity information to access point, make access point can behind MME corresponding according to described identity information determination cellular network or base station, to MME or described 4th message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described communication terminal in described cellular network connected state judge need be switched to WLAN from cellular network time, described second forwarding step is specially: send the 5th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described communication terminal is in described cellular network when Idle state is judged to need to be switched to WLAN from cellular network, and described second forwarding step is specially: the connection procedure being initiated to described cellular network; In connection procedure or after connecting, send the 6th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, the connection procedure being initiated to described cellular network described in is specially: the connection procedure being initiated to the serving BS in described cellular network, MME or gateway.

Present invention also offers a kind of Notification Method of communication terminal state, for the network element in cellular network, described Notification Method comprises: receiving step: the described communication terminal of reception one instruction is switched to WLAN from cellular network or needs are switched to the notification message of WLAN from cellular network; Treatment step: process described notification message, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described network element is PDN-GW, MME or base station.

Preferably, after described communication terminal is switched to WLAN from cellular network, described notification message is received by WLAN.

Preferably, described network element is PDN-GW, carry the identity information of described communication terminal in described cellular network in described notification message, described process described notification message specifically comprises: according to corresponding MME or base station in described identity information determination cellular network; Notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

Preferably, described communication terminal is in Cellular Networks, and when needing to be switched to WLAN from cellular network, described notification message is sent by described communication terminal.

Present invention also offers a kind of notifying device of communication terminal state, for the access point in WLAN, described notifying device comprises: the first judge module, for judging whether communication terminal is switched to WLAN from cellular network, obtains the first judged result; First sending module, for when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, send the first message to the first object network element in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described first object network element is PDN-GW, described first sending module comprises: the first acquiring unit, for when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, and the identity information of obtaining communication terminal in described cellular network; First transmitting element, for sending described first message of carrying described identity information to described PDN-GW, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

Preferably, described first object network element is MME or base station, described first sending module comprises: second acquisition unit, for when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, and the identity information of obtaining communication terminal in described cellular network; First determining unit, for according to MME corresponding in described identity information determination cellular network or base station; Second transmitting element, for sending described first message to the MME of described correspondence or base station, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Present invention also offers a kind of access point, comprise notifying device as above.

Present invention also offers a kind of notifying device of communication terminal state, for a communication terminal, described notifying device comprises: the second judge module, for judging that communication terminal is the need of being switched to WLAN or whether being switched to WLAN from cellular network from cellular network, obtain a judged result; Second sending module, when needing for indicating described communication terminal in judged result be switched to WLAN from cellular network or be switched to WLAN from cellular network, send the second message, cellular network can be determined and the state recording described communication terminal for be switched to WLAN from cellular network.

Preferably, when described communication terminal is switched to WLAN from cellular network, described notifying device also comprises: the first acquisition module, for obtaining the identity information of described communication terminal in described cellular network; Second sending module is further used for sending second message of carrying described identity information to PDN-GW by access point, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

Preferably, when described communication terminal is switched to WLAN from cellular network, described notifying device also comprises: the second acquisition module, for the identity information of obtaining communication terminal in described cellular network; Second sending module is further used for sending the 3rd message of carrying described identity information to access point, make access point can behind MME corresponding according to described identity information determination cellular network or base station, to MME or described 4th message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described communication terminal in described cellular network connected state judge need be switched to WLAN from cellular network time, described second sending module is further used for sending the 5th message to the serving BS in cellular network, MME or gateway, and described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described communication terminal is in described cellular network when Idle state is judged to need to be switched to WLAN from cellular network, and described second sending module comprises: connect and initiate unit, for being initiated to the connection procedure of described cellular network; 3rd transmitting element, in connection procedure or after connecting, send the 6th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described connection initiates the connection procedure that unit is further used for serving BS, MME or the gateway be initiated in described cellular network.

Present invention also offers a kind of terminal, comprise notifying device as above.

Present invention also offers a kind of notifying device of communication terminal state, for the network element in cellular network, described notifying device comprises: receiver module, is switched to WLAN for receiving the described communication terminal of an instruction or needs to be switched to from cellular network the notification message of WLAN from cellular network; Processing module, for processing described notification message, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

Preferably, described network element is PDN-GW, MME or base station.

Preferably, described network element is PDN-GW, carry the identity information of described communication terminal in described cellular network in described notification message, described processing module comprises: the second determining unit, for according to corresponding MME or base station in described identity information determination cellular network; Switch unit, for notifying that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

Present invention also offers a kind of network element, it is characterized in that, comprise notifying device as above.

The beneficial effect of technique scheme of the present invention is as follows:

Technical scheme of the present invention by prepare to exit at communication terminal cellular network or access wlan network after, message is sent in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

Accompanying drawing explanation

The flow chart of the Notification Method of the communication terminal state that Fig. 1 provides for the embodiment of the present invention 1.

The flow chart of the Notification Method of the communication terminal state that Fig. 2 provides for the embodiment of the present invention 2.

The flow chart of the Notification Method of the communication terminal state that Fig. 3 provides for the embodiment of the present invention 3.

The structural representation of the notifying device of the communication terminal state that Fig. 4 provides for the embodiment of the present invention 1.

The structural representation of the notifying device of the communication terminal state that Fig. 5 provides for the embodiment of the present invention 2.

The structural representation of the notifying device of the communication terminal state that Fig. 6 provides for the embodiment of the present invention 3.

The flow chart of the Notification Method of the communication terminal state that Fig. 7 provides for the embodiment of the present invention 4.

The flow chart of the Notification Method of the communication terminal state that Fig. 8 provides for the embodiment of the present invention 5.

The flow chart of the Notification Method of the communication terminal state that Fig. 9 provides for the embodiment of the present invention 6.

The flow chart of the Notification Method of the communication terminal state that Figure 10 provides for the embodiment of the present invention 7.

The flow chart of the Notification Method of the communication terminal state that Figure 11 provides for the embodiment of the present invention 8.

The flow chart of the Notification Method of the communication terminal state that Figure 12 provides for the embodiment of the present invention 9.

The flow chart of the Notification Method of the communication terminal state that Figure 13 provides for the embodiment of the present invention 10.

The flow chart of the Notification Method of the communication terminal state that Figure 14 provides for the embodiment of the present invention 11.

Embodiment

For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.

The present invention is directed in prior art, when communication terminal satisfies condition, to leave voluntarily and after accessing wlan network from cellular network, erroneous judgement can be caused to cellular network, make Cellular Networks to the behavior of communication terminal, unpredictable, cause the problem of possible error handle, provide a kind of Notification Method of communication terminal state, device, access point, terminal and network element, can communication terminal prepare to exit cellular network or access wlan network after, message is sent in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

The flow chart of the Notification Method of the communication terminal state that Fig. 1 provides for the embodiment of the present invention 1, described Notification Method is used for the AP(Access Point in WLAN, access point), as shown in the figure, described Notification Method comprises:

Step S100, the first determining step: judge whether communication terminal is switched to WLAN from cellular network, obtain the first judged result;

Step S102, first forwarding step: when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, send the first message to the first object network element in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, described Notification Method is used for the access point in WLAN, first judge whether communication terminal is switched to WLAN from cellular network, when communication terminal switches to WLAN from cellular network, by sending the first message to the first object network element in cellular network, cellular network is determined and the state of recording communication terminal, thus, after communication terminal access WLAN, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

Wherein, described first object network element can be packet data gateway PDN-GW, mobile management entity MME or base station.

When described first object network element is PDN-GW, described first forwarding step can comprise:

When described first judged result indicates described communication terminal to be switched to WLAN from cellular network, the identity information of obtaining communication terminal in described cellular network;

Described first message of carrying described identity information is sent to described PDN-GW, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

In technique scheme, the state of communication terminal described in cellular network is notified by PDN-GW, can determine that in order to make cellular network the state of also recording communication terminal is for switch to WLAN from cellular network, need the message to the resident in cellular networks core net node MME of communication terminal or the communication terminal relevant switching state of base station notice at place in cellular networks, namely obtaining communication terminal identity information is in cellular networks needed, the MME that communication terminal is corresponding in cellular networks or base station can be determined by this identity information, therefore, when first object network element is PDN-GW, after receiving the first message carrying described identity information, just can notify the state of communication terminal described in the MME that communication terminal is corresponding in cellular networks or base station.

When described first object network element is MME or base station, described first forwarding step can comprise:

According to MME corresponding in described identity information determination cellular network or base station; To MME or described first message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, by the state of communication terminal described in MME or base station notice cellular network, need to determine the MME that communication terminal is corresponding in cellular networks or base station for this reason, therefore, after obtaining the identity information of communication terminal in described cellular network, determine corresponding MME or base station according to described identity information.

Wherein, described identity information can be that the unique interim UE in the whole world identifies GUTI, interim identity S-TMSI or Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI, namely by described identity information, should be able to determine described communication terminal corresponding MME or base station in described cellular network.

The flow chart of the Notification Method of the communication terminal state that Fig. 2 provides for the embodiment of the present invention 2, described Notification Method is used for a communication terminal, and as shown in the figure, described Notification Method comprises:

Step S200, the second determining step: judge that communication terminal is the need of being switched to WLAN or whether being switched to WLAN from cellular network from cellular network, obtain a judged result;

Step S202, second forwarding step: when judged result indicates described communication terminal to need be switched to WLAN from cellular network or be switched to WLAN from cellular network, send the second message, cellular network can be determined and the state recording described communication terminal for be switched to WLAN from cellular network.

In technique scheme, described Notification Method is used for a communication terminal, first judge that communication terminal is the need of being switched to WLAN from cellular network or whether being switched to WLAN from cellular network, when communication terminal needs be switched to WLAN from cellular network or be switched to WLAN from cellular network, by sending the second message, cellular network is determined and the state of recording communication terminal, thus, after communication terminal access WLAN, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

Wherein, when described communication terminal is switched to WLAN from cellular network, described Notification Method can also comprise: obtain the identity information of described communication terminal in described cellular network; Second forwarding step is specially: sent second message of carrying described identity information to PDN-GW by access point, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

In technique scheme, can determine that in order to make cellular network the state of also recording communication terminal is for switch to WLAN from cellular network, need the message to the resident in cellular networks core net node MME of communication terminal or the communication terminal relevant switching state of base station notice at place in cellular networks, namely need obtaining communication terminal identity information in cellular networks, the MME that communication terminal is corresponding in cellular networks or base station can be determined by this identity information.

Therefore, after communication terminal switches to WLAN from cellular network, after carrying the second message of described identity information by WLAN access point to PDN-GW transmission, just can notify the state of communication terminal described in the MME that communication terminal is corresponding in cellular networks or base station.

Wherein, when described communication terminal is switched to WLAN from cellular network, described Notification Method can also comprise:

The identity information of obtaining communication terminal in described cellular network;

Second forwarding step can be specially: send the 3rd message of carrying described identity information to access point, make access point can behind MME corresponding according to described identity information determination cellular network or base station, to MME or described 4th message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, after obtaining the identity information of communication terminal in described cellular network, the 3rd message of carrying described identity information is sent, by WLAN access point to the state that can notify communication terminal described in the MME that communication terminal is corresponding in cellular networks or base station to WLAN access point.

Wherein, described communication terminal in described cellular network connected state judge need be switched to WLAN from cellular network time, described second forwarding step can be specially: send the 5th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, described communication terminal is in connected state in described cellular network, now communication terminal needs to be switched to WLAN from cellular network, due to communication terminal can with cellular network communication, therefore, related news can be sent directly to described cellular network, described cellular network can be determined and determine the state of described communication terminal, such as, related news can be sent to the serving BS at this communication terminal place, resident core net node MME or associated gateway.

Wherein, described communication terminal is in described cellular network when Idle state is judged to need to be switched to WLAN from cellular network, and described second forwarding step can be specially:

Be initiated to the connection procedure of described cellular network; In connection procedure or after connecting, send the 6th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, described communication terminal is in Idle state in described cellular network, now communication terminal needs to be switched to WLAN from cellular network, due to communication terminal cannot with cellular network communication, therefore, the connection procedure of described cellular network can be created to, in connection procedure or after connecting, related news are sent to described cellular network, described cellular network can be determined and determine the state of described communication terminal, such as, can to the serving BS at this communication terminal place, resident core net node MME or associated gateway send related news.

Wherein, the described connection procedure being initiated to described cellular network can be specially: the connection procedure being initiated to the serving BS in described cellular network, MME or gateway, communication terminal can initiate connection procedure, as long as can realize the object of carrying out with described cellular network communicating to the network element in described cellular network.

The flow chart of the Notification Method of the communication terminal state that Fig. 3 provides for the embodiment of the present invention 3, described Notification Method is used for the network element in cellular network, and as shown in the figure, described Notification Method comprises:

Step S300, receiving step: receive the described communication terminal of an instruction and be switched to WLAN from cellular network or need to be switched to from cellular network the notification message of WLAN;

Step S302, treatment step: process described notification message, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, described Notification Method is used for the network element in cellular network, the communication terminal that indicates according to receiving needs to be switched to WLAN from cellular network or to be switched to the notification message of WLAN from cellular network, by processing this notification message, cellular network is determined and the state of recording communication terminal, thus, after communication terminal access WLAN, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

Wherein, described network element can be PDN-GW, MME or base station, processes as long as the network element in described cellular network can receive described notification message, can determine and the state of recording communication terminal to make described cellular network.

Wherein, after described communication terminal is switched to WLAN from cellular network, described notification message can be received by WLAN.

Wherein, when described network element is PDN-GW, carry the identity information of described communication terminal in described cellular network in described notification message, describedly process is carried out to described notification message can specifically comprise: according to corresponding MME or base station in described identity information determination cellular network; Notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

In technique scheme, can determine that in order to make cellular network the state of also recording communication terminal is for switch to WLAN from cellular network, need the message to the resident in cellular networks core net node MME of communication terminal or the communication terminal relevant switching state of base station notice at place in cellular networks, therefore, can identity information be carried in described notification message, corresponding MME or base station can be determined by this identity information.

Wherein, described communication terminal is in Cellular Networks, and when needing to be switched to WLAN from cellular network, described notification message can be sent by described communication terminal.

The structural representation of the notifying device of the communication terminal state that Fig. 4 provides for the embodiment of the present invention 1, described notifying device is used for the access point in WLAN, and described notifying device 40 comprises:

First judge module 41, for judging whether communication terminal is switched to WLAN from cellular network, obtains the first judged result;

First sending module 42, for when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, send the first message to the first object network element in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, described notifying device 40 is for the access point in WLAN, first judge module 41 judges whether communication terminal is switched to WLAN from cellular network, when communication terminal switches to WLAN from cellular network, first sending module 42 is by sending the first message to the first object network element in cellular network, cellular network is determined and the state of recording communication terminal, thus, after communication terminal access WLAN, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

The structural representation of the notifying device of the communication terminal state that Fig. 5 provides for the embodiment of the present invention 2, described notifying device is used for a communication terminal, and as shown in the figure, described notifying device 50 comprises:

Second judge module 51, for judging that communication terminal is the need of being switched to WLAN or whether being switched to WLAN from cellular network from cellular network, obtain a judged result;

Second sending module 52, when needing for indicating described communication terminal in judged result be switched to WLAN from cellular network or be switched to WLAN from cellular network, send the second message, cellular network can be determined and the state recording described communication terminal for be switched to WLAN from cellular network.

In technique scheme, described notifying device 50 is for a communication terminal, second judge module 51 judges that communication terminal is the need of being switched to WLAN from cellular network or whether being switched to WLAN from cellular network, when communication terminal needs be switched to WLAN from cellular network or be switched to WLAN from cellular network, second sending module 52 sends the second message, cellular network is determined and the state of recording communication terminal, thus, after communication terminal access WLAN, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

The structural representation of the notifying device of the communication terminal state that Fig. 6 provides for the embodiment of the present invention 3, described notifying device is used for the network element in cellular network, and described notifying device 60 comprises:

Receiver module 61, is switched to WLAN from cellular network for receiving the described communication terminal of an instruction or needs to be switched to from cellular network the notification message of WLAN;

Processing module 62, for processing described notification message, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

In technique scheme, described notifying device 60 is for the network element in cellular network, the communication terminal that indicates received by receiver module 61 needs to be switched to WLAN from cellular network or to be switched to the notification message of WLAN from cellular network, processing module 62 processes, cellular network is determined and the state of recording communication terminal, thus, after communication terminal access WLAN, avoid the behavior of Cellular Networks to communication terminal unpredictable, cause the problem of possible error handle.

Preferably, described network element is PDN-GW, MME or base station.

The flow chart of the Notification Method of the communication terminal state that Fig. 7 provides for the embodiment of the present invention 4, as shown in the figure, described Notification Method comprises:

Step S700, communication terminal UE leave cellular network access WLAN;

Step S702, wlan network carries out certification and authentication to UE, completes the connectedness of UE and PDN-GW; Wlan network is by AAA(Authentication Authorization Accounting in this step, the network safety system of authentication, mandate and statistics) complete certification to UE and authentication, and define the connecting path of UE to PDN-GW, namely UE can be communicated by WLAN and PDN-GW.

Its identify label is in cellular networks sent to PDN-GW by step S704, UE; Wherein, identify label comprises cellular network is the information such as GUTI, S-TMSI of this UE distribution.

Step S706, PDN-GW determine the core net node MME that UE is resident in cellular networks the current state information of this UE to be sent to described MME according to the identify label that UE sends; Wherein, the current state information of this UE comprise the current network insertion state of this UE be by WLAN access, access WLAN reason be the information such as network shunt.

The current state information of the UE received is sent to UE base station, place in cellular networks by step S708, core net node MME;

Step S710, after base station receives the current state information of UE, carries out the process operation of being correlated with; Wherein, described process operation comprises the resource (as contextual information and connection etc.) discharging this UE, the state marking this UE etc., marks the state etc. of this UE.

The flow chart of the Notification Method of the communication terminal state that Fig. 8 provides for the embodiment of the present invention 5, as shown in the figure, described Notification Method comprises:

Step S800, communication terminal UE leave cellular network access WLAN; Wherein, UE, when accessing WLAN, provides this UE identify label in cellular networks to send to PDN-GW to WLAN; Wherein, it is the information such as GUTI, S-TMSI or C-RNTI of this UE distribution that identify label comprises cellular network, and the current state information of this UE is provided, comprise the current network insertion state of this UE be by WLAN access, access WLAN reason be the information such as network shunt.

Step S802, WLAN get UE identify label in cellular networks and current state information;

Step S804, wlan network carries out certification and authentication to UE, completes the connectedness of WLAN and PDN-GW; Wlan network completes certification to UE and authentication by AAA in this step, and defines the connecting path of WLAN to PDN-GW, and namely WLAN can communicate with PDN-GW.

UE identify label in cellular networks and current state information are sent to PDN-GW by step S806, WLAN;

Step S808, PDN-GW determine the core net node MME that UE is resident in cellular networks the current state information of this UE to be sent to described MME according to the identify label that UE sends;

The current state information of the UE received is sent to UE base station, place in cellular networks by step S810, core net node MME;

Step S812, after base station receives the current state information of UE, carries out the process operation of being correlated with; Wherein, described process operation comprises the contextual information of this UE of release and connection, marks the state etc. of this UE.

The flow chart of the Notification Method of the communication terminal state that Fig. 9 provides for the embodiment of the present invention 6, as shown in the figure, described Notification Method comprises:

Step S900, communication terminal UE leave cellular network access WLAN; Wherein, UE, when accessing WLAN, provides this UE identify label in cellular networks to send to PDN-GW to WLAN; Wherein, it is the information such as GUTI, S-TMSI or C-RNTI of this UE distribution that identify label comprises cellular network, and the current state information of this UE is provided, comprise the current network insertion state of this UE be by WLAN access, access WLAN reason be the information such as network shunt.

Step S902, WLAN get UE identify label in cellular networks and current state information;

Step S904, wlan network carries out certification and authentication to UE, completes the connectedness of WLAN and core net node MME; Wlan network completes certification to UE and authentication by AAA in this step, and determine according to the identify label that UE sends the core net node MME that UE is resident in cellular networks, define the connecting path of WLAN to this MME, the MME that namely WLAN can be resident in cellular networks with UE communicates.

UE identify label in cellular networks and current state information are sent to MME by step S906, WLAN;

The current state information of this UE is sent to UE base station, place in cellular networks by step S908, core net node MME;

Step S910, after base station receives the current state information of UE, carries out the process operation of being correlated with; Wherein, described process operation comprises the resource (as contextual information and connection etc.) of this UE of release, marks the state etc. of this UE.

The flow chart of the Notification Method of the communication terminal state that Figure 10 provides for the embodiment of the present invention 7, as shown in the figure, described Notification Method comprises:

Step S1000, communication terminal UE leave cellular network access WLAN; Wherein, UE, when accessing WLAN, provides this UE identify label in cellular networks to send to PDN-GW to WLAN; Wherein, it is the information such as GUTI, S-TMSI or C-RNTI of this UE distribution that identify label comprises cellular network, and the current state information of this UE is provided, comprise the current network insertion state of this UE be by WLAN access, access WLAN reason be the information such as network shunt.

Step S1002, WLAN get UE identify label in cellular networks and current state information;

Step S1004, wlan network carries out certification and authentication to UE, completes the connectedness of WLAN and base station eNB; Wlan network completes certification to UE and authentication by AAA in this step, and the eNB at UE place is in cellular networks determined according to the identify label that UE sends, define the connecting path of WLAN to this eNB, namely WLAN can communicate with the eNB at UE place in cellular networks.

UE identify label in cellular networks and current state information are sent to MME by step S1006, WLAN;

Step S1008, after base station receives the current state information of UE, carries out the process operation of being correlated with; Wherein, described process operation comprises the contextual information of this UE of release and connection, marks the state etc. of this UE.

Step S1010, the core net node MME that the current state information of UE sends to UE resident in cellular networks by base station;

Step S1012, MME take corresponding process according to the current state information of this UE.

The flow chart of the Notification Method of the communication terminal state that Figure 11 provides for the embodiment of the present invention 8, described communication terminal is in connected state, and as shown in the figure, described Notification Method comprises:

Step S1100, communication terminal UE prepares to exit cellular network;

Step S1102, UE send a notification message to the wireless network node in cellular network; Wherein, wireless network node can be the base station eNB at this UE place, and it is left the reason of cellular network by WLAN access, this UE, as information such as network shunt that described message comprises the current network insertion state of this UE.

The core net node MME that the notification message received sends to UE resident in cellular networks by step S1104, eNB;

Step S1106, MME carry out the process operation of being correlated with according to the notification message received, such as, mark the state etc. of UE;

The nodes such as the SGW/PGW/HSS that the notification message received sends to UE to be communicated with in cellular networks by step S1108, MME;

The nodes such as step S1110, SGW/PGW/HSS carry out the process operation of being correlated with according to the notification message received, such as, mark the state etc. of UE.

The flow chart of the Notification Method of the communication terminal state that Figure 12 provides for the embodiment of the present invention 9, described communication terminal is in Idle state, and as shown in the figure, described Notification Method comprises:

Step S1200, communication terminal UE prepares to exit cellular network;

Step S1202, UE initiate to connect to the base station eNB at its place in cellular network, and in the process, UE sends a notification message to eNB; Wherein, described message comprises the current network insertion state of this UE is left the reason of cellular network by WLAN access, this UE, as information such as network shunt.

The core net node MME that the notification message received sends to UE resident in cellular networks by step S1204, eNB;

Step S1206, MME carry out the process operation of being correlated with according to the notification message received, such as, mark the state etc. of UE;

The nodes such as the SGW/PGW/HSS that the notification message received sends to UE to be communicated with in cellular networks by step S1208, MME;

The nodes such as step S1210, SGW/PGW/HSS carry out the process operation of being correlated with according to the notification message received, such as, mark the state etc. of UE.

The flow chart of the Notification Method of the communication terminal state that Figure 13 provides for the embodiment of the present invention 10, described communication terminal is in Idle state, and as shown in the figure, described Notification Method comprises:

Step S1300, communication terminal UE prepares to exit cellular network;

Step S1302, UE its resident core net node MME in cellular network initiates to connect, in the process, UE sends a notification message to MME; Wherein, described message comprises the current network insertion state of this UE is left the reason of cellular network by WLAN access, this UE, as information such as network shunt.

Step S1304, MME carry out the process operation of being correlated with according to the notification message received, such as, mark the state etc. of UE;

The nodes such as the SGW/PGW/HSS that the notification message received sends to UE to be communicated with in cellular networks by step S1306, MME;

The nodes such as step S1308, SGW/PGW/HSS carry out the process operation of being correlated with according to the notification message received, such as, mark the state etc. of UE.

The flow chart of the Notification Method of the communication terminal state that Figure 14 provides for the embodiment of the present invention 11, described communication terminal is in Idle state, and as shown in the figure, described Notification Method comprises:

Step S1400, communication terminal UE prepares to exit cellular network;

Step S1402, UE initiate to connect to cellular network, make UE be in connected state

Step S1404, UE send the notification messages such as business release or disconnecting request to cellular network, and cellular network is known, and this UE will leave; Wherein, described notification message comprises the current network insertion state of this UE is left the reason of cellular network by WLAN access, this UE, as information such as network shunt.

Step S1406, the node in cellular network, the process carrying out being correlated with according to the notification message received as nodes such as SGW/PGW/HSS operates, such as, mark the state etc. of UE.

The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. a Notification Method for communication terminal state, is characterized in that, for the access point in WLAN, described Notification Method comprises:

First determining step: judge whether communication terminal is switched to WLAN from cellular network, obtain the first judged result;

First forwarding step: when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, send the first message to the first object network element in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

2. Notification Method according to claim 1, is characterized in that, described first object network element is packet data gateway PDN-GW, mobile management entity MME or base station.

3. Notification Method according to claim 2, is characterized in that, described first object network element is PDN-GW, and described first forwarding step comprises:

When described first judged result indicates described communication terminal to be switched to WLAN from cellular network, obtain the identity information of described communication terminal in described cellular network;

4. Notification Method according to claim 2, is characterized in that, described first object network element is MME or base station, and described first forwarding step comprises:

According to MME corresponding in described identity information determination cellular network or base station;

To MME or described first message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

5. the Notification Method according to claim 3 or 4, is characterized in that, described identity information is that the unique interim UE in the whole world identifies GUTI, interim identity S-TMSI or Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI.

6. a Notification Method for communication terminal state, is characterized in that, for a communication terminal, described Notification Method comprises:

Second determining step: judge that communication terminal is the need of being switched to WLAN or whether being switched to WLAN from cellular network from cellular network, obtain a judged result;

Second forwarding step: when judged result indicates described communication terminal to need be switched to WLAN from cellular network or be switched to WLAN from cellular network, send the second message, cellular network can be determined and the state recording described communication terminal for be switched to WLAN from cellular network.

7. Notification Method according to claim 6, is characterized in that, when described communication terminal is switched to WLAN from cellular network, described Notification Method also comprises:

Obtain the identity information of described communication terminal in described cellular network;

Second forwarding step is specially: sent second message of carrying described identity information to PDN-GW by access point, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

8. Notification Method according to claim 6, is characterized in that, when described communication terminal is switched to WLAN from cellular network, described Notification Method also comprises:

Second forwarding step is specially: send the 3rd message of carrying described identity information to access point, make access point can behind MME corresponding according to described identity information determination cellular network or base station, to MME or described 4th message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

9. Notification Method according to claim 6, it is characterized in that, described communication terminal in described cellular network connected state judge need be switched to WLAN from cellular network time, described second forwarding step is specially: send the 5th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

10. Notification Method according to claim 6, is characterized in that, described communication terminal is in described cellular network when Idle state is judged to need to be switched to WLAN from cellular network, and described second forwarding step is specially:

Be initiated to the connection procedure of described cellular network;

In connection procedure or after connecting, send the 6th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

11. Notification Methods according to claim 10, is characterized in that, described in be initiated to described cellular network connection procedure be specially:

Be initiated to the connection procedure of the serving BS in described cellular network, MME or gateway.

The Notification Method of 12. 1 kinds of communication terminal states, is characterized in that, for the network element in cellular network, described Notification Method comprises:

Receiving step: receive the described communication terminal of an instruction and be switched to WLAN from cellular network or need to be switched to from cellular network the notification message of WLAN;

Treatment step: process described notification message, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

13. Notification Methods according to claim 12, is characterized in that, described network element is PDN-GW, MME or base station.

14. Notification Methods according to claim 13, is characterized in that, after described communication terminal is switched to WLAN from cellular network, described notification message is received by WLAN.

15. Notification Methods according to claim 14, is characterized in that, described network element is PDN-GW, carry the identity information of described communication terminal in described cellular network in described notification message, and described process described notification message specifically comprises:

According to corresponding MME or base station in described identity information determination cellular network;

Notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

16. Notification Methods according to claim 13, is characterized in that, described communication terminal is in Cellular Networks, and when needing to be switched to WLAN from cellular network, described notification message is sent by described communication terminal.

17., according to the Notification Method in claim 12-16 described in any one, is characterized in that, process in described treatment step to described notification message, and base station can also be made to be released to the resource of described communication terminal distribution.

The notifying device of 18. 1 kinds of communication terminal states, is characterized in that, for the access point in WLAN, described notifying device comprises:

First judge module, for judging whether communication terminal is switched to WLAN from cellular network, obtains the first judged result;

First sending module, for when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, send the first message to the first object network element in cellular network, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

19. notifying devices according to claim 18, is characterized in that, described first object network element is packet data gateway PDN-GW, mobile management entity MME or base station.

20. notifying devices according to claim 19, is characterized in that, described first object network element is PDN-GW, and described first sending module comprises:

First acquiring unit, for when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, the identity information of obtaining communication terminal in described cellular network;

First transmitting element, for sending described first message of carrying described identity information to described PDN-GW, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

21. notifying devices according to claim 19, is characterized in that, described first object network element is MME or base station, and described first sending module comprises:

Second acquisition unit, for when described first judged result indicates described communication terminal to be switched to WLAN from cellular network, the identity information of obtaining communication terminal in described cellular network;

First determining unit, for according to MME corresponding in described identity information determination cellular network or base station;

Second transmitting element, for sending described first message to the MME of described correspondence or base station, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

22. notifying devices according to claim 20 or 21, is characterized in that, described identity information is that the unique interim UE in the whole world identifies GUTI, interim identity S-TMSI or Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI.

23. 1 kinds of access points, is characterized in that, comprise the notifying device in claim 18-22 described in any one.

The notifying device of 24. 1 kinds of communication terminal states, is characterized in that, for a communication terminal, described notifying device comprises:

Second judge module, for judging that communication terminal is the need of being switched to WLAN or whether being switched to WLAN from cellular network from cellular network, obtain a judged result;

Second sending module, when needing for indicating described communication terminal in judged result be switched to WLAN from cellular network or be switched to WLAN from cellular network, send the second message, cellular network can be determined and the state recording described communication terminal for be switched to WLAN from cellular network.

25. notifying devices according to claim 24, is characterized in that, when described communication terminal is switched to WLAN from cellular network, described notifying device also comprises:

First acquisition module, for obtaining the identity information of described communication terminal in described cellular network;

Second sending module is further used for sending second message of carrying described identity information to PDN-GW by access point, make described PDN-GW according to described identity information determination cellular network behind corresponding MME or base station, can notify that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

26. notifying devices according to claim 24, is characterized in that, when described communication terminal is switched to WLAN from cellular network, described notifying device also comprises:

Second acquisition module, for the identity information of obtaining communication terminal in described cellular network;

Second sending module is further used for sending the 3rd message of carrying described identity information to access point, make access point can behind MME corresponding according to described identity information determination cellular network or base station, to MME or described 4th message of base station transmission of described correspondence, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

27. notifying devices according to claim 24, it is characterized in that, described communication terminal in described cellular network connected state judge need be switched to WLAN from cellular network time, described second sending module is further used for sending the 5th message to the serving BS in cellular network, MME or gateway, and described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

28. notifying devices according to claim 24, is characterized in that, described communication terminal is in described cellular network when Idle state is judged to need to be switched to WLAN from cellular network, and described second sending module comprises:

Connect and initiate unit, for being initiated to the connection procedure of described cellular network;

3rd transmitting element, in connection procedure or after connecting, send the 6th message to the serving BS in cellular network, MME or gateway, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

29. notifying devices according to claim 28, is characterized in that, described connection initiates the connection procedure that unit is further used for serving BS, MME or the gateway be initiated in described cellular network.

30. 1 kinds of terminals, is characterized in that, comprise the notifying device in claim 24-29 described in any one.

The notifying device of 31. 1 kinds of communication terminal states, is characterized in that, for the network element in cellular network, described notifying device comprises:

Receiver module, is switched to WLAN from cellular network for receiving the described communication terminal of an instruction or needs to be switched to from cellular network the notification message of WLAN;

Processing module, for processing described notification message, described cellular network is known, and the state of described communication terminal is for be switched to WLAN from cellular network.

32. notifying devices according to claim 31, is characterized in that, described network element is PDN-GW, MME or base station.

33. notifying devices according to claim 31, is characterized in that, after described communication terminal is switched to WLAN from cellular network, described notification message is received by WLAN.

34. notifying devices according to claim 33, is characterized in that, described network element is PDN-GW, and carry the identity information of described communication terminal in described cellular network in described notification message, described processing module comprises:

Second determining unit, for according to corresponding MME or base station in described identity information determination cellular network;

Switch unit, for notifying that the state of communication terminal described in described MME or base station is for be switched to WLAN from cellular network.

35. notifying devices according to claim 31, is characterized in that, described communication terminal is in Cellular Networks, and when needing to be switched to WLAN from cellular network, described notification message is sent by described communication terminal.

36. 1 kinds of network elements, is characterized in that, comprise the notifying device described in any one of claim 31-35.