CN103889013A

CN103889013A - Cellular network and WLAN seamless switching method, device and client

Info

Publication number: CN103889013A
Application number: CN201210554883.1A
Authority: CN
Inventors: 马云飞; 乔琳; 王志明; 石勇; 高羽; 孙雅明; 宋志刚; 王帆; 赵良毕
Original assignee: China Mobile Group Beijing Co Ltd
Current assignee: China Mobile Group Beijing Co Ltd
Priority date: 2012-12-19
Filing date: 2012-12-19
Publication date: 2014-06-25

Abstract

The invention provides a cellular network and WLAN seamless switching method, device and client. The method comprises the following steps: terminal position information reported by a terminal is acquired, a relational database is queried to acquire hotspot position information of each WLAN hotspot, and the distance minimum value between the terminal and each WLAN hotspot is calculated according to the terminal position information and the hotspot position information of each WLAN hotspot; the distance minimum value is judged whether to be less than a default distance threshold value; if the distance minimum value is less than the fault distance threshold value, then the strategy state of the WLAN hotspot corresponding to the distance minimum value is judged whether to allow the access of the terminal; and if the strategy state of the WLAN hotspot is that the access of the terminal is allowed, then switching strategy information is issued to the terminal. The switching strategy information is generated through the network side to notice the terminal to access the WLAN hotspot, so the utilization rate of the WLAN network can be improved, and the load pressure of the cellular network can be reduced.

Description

Seamless handover method, device and client between cellular network and WLAN

Technical field

The present invention relates to the communication technology in communication network, relate in particular to seamless handover method, device and client between a kind of cellular network and WLAN.

Background technology

In current networking, the scale that Cellular Networks is disposed is very grand, WLAN (Wireless Local Area Networks is called for short WLAN) builds also to become slightly to some extent, and wlan network can provide better user to experience to user compared with cellular network.And the current service condition of existing network is that Cellular Networks Zone level is high, WLAN professional skill is low, therefore the in the situation that at Cellular Networks network, compared with hurrying, wlan network being relatively idle, be necessary fully to excavate wlan network, user is switched in wlan network from cellular network, reduce Cellular Networks offered load, improve the utilance of WLAN.

In conventional art, it is mainly the exchange that realizes cellular network and wlan network by user's manual operation, be that user opens terminal WLAN search, search the access authentication operation that manually completes again WLAN after corresponding WLAN signal, this mode needs user manually to complete the switching of wlan network, complex operation, cannot embody the switchover policy of network side.

Summary of the invention

For the above-mentioned defect of conventional art, the embodiment of the present invention provides seamless handover method, device and the client between a kind of cellular network and WLAN.

The embodiment of the present invention provides the seamless handover method between a kind of cellular network and WLAN, comprising:

Obtain the terminal positional information of terminal to report, bid associated data storehouse obtains the hotspot location information of each WLAN focus, according to the hotspot location information of described terminal positional information and each described WLAN focus, calculate the distance minimum value between described terminal and each described WLAN focus;

Judge describedly whether be less than predeterminable range threshold value apart from minimum value;

Whether the Policy Status that described predeterminable range threshold value judges the described WLAN focus corresponding apart from minimum value if be less than is to allow described terminal access;

If the Policy Status of described WLAN focus is for allowing described terminal access, issue switchover policy information to described terminal, described switchover policy information comprises the described WLAN hot information that allows described terminal access, open WLAN search for described terminal according to described switchover policy information, access described WLAN focus, complete the switching from Cellular Networks to WLAN.

The business datum connection status of monitor terminal, when the business datum connection status of obtaining described terminal is activated, the residence time of described terminal in current Cellular Networks community;

Judge whether the described residence time is greater than the default residence time;

If be greater than the default residence time reporting terminal positional information to server, for the seamless switching operation between described startup of server cellular network and WLAN;

Obtain the switchover policy information that server issues, according to described switchover policy information, open WLAN search, disconnect Cellular Networks data and connect, access WLAN focus.

The embodiment of the present invention provides the seamless switching device between a kind of cellular network and WLAN, comprising:

Processing module, for obtaining the terminal positional information of terminal to report, bid associated data storehouse obtains the hotspot location information of each WLAN focus, according to the hotspot location information of described terminal positional information and each described WLAN focus, calculate the distance minimum value between described terminal and each described WLAN focus;

Whether Distance Judgment module, be describedly less than predeterminable range threshold value apart from minimum value for judging;

WLAN Policy Status judge module, if for being less than described predeterminable range threshold value, judges whether the Policy Status of the described WLAN focus corresponding apart from minimum value is to allow described terminal access;

Issue module, if be the described terminal access of permission for the Policy Status of described WLAN focus, issue switchover policy information to described terminal, described switchover policy information comprises the described WLAN hot information that allows described terminal access, open WLAN search for described terminal according to described switchover policy information, access described WLAN focus, complete the switching from Cellular Networks to WLAN.

The embodiment of the present invention provides the client of the seamless switching between a kind of cellular network and WLAN, comprising:

Monitor module, for the business datum connection status of monitor terminal, when the business datum connection status of obtaining described terminal is activated, the residence time of described terminal in current Cellular Networks community;

Residence time judge module, presets the residence time for judging whether the described residence time is greater than, if be greater than default notice reporting module of residence time;

Reporting module,, operates for the seamless switching between described startup of server cellular network and WLAN to server for reporting terminal positional information;

Handover module, the switchover policy information issuing for obtaining server, according to described switchover policy information, opens WLAN search, disconnects Cellular Networks data and connects, access WLAN focus.

In the technical scheme of the present embodiment, seamless switching device between cellular network and WLAN is by obtaining the terminal positional information of terminal, bid associated data storehouse obtains the hotspot location information of the whole network WLAN focus, according to terminal positional information and the nearest WLAN focus of hotspot location information judging distance terminal whether in the scope of predeterminable range threshold value, if further whether the nearest WLAN focus of judging distance terminal allows terminal access, if allowed, issue switchover policy information to this terminal, notify this terminal to open WLAN search, access this WLAN focus.Realize network side and carried out intelligent decision, formulate switchover policy information notification terminal access WLAN focus, thereby improve the utilance of wlan network, reduce the load pressure of cellular network, further, because switchover policy information is to be formulated by network side, therefore carry out loaded down with trivial details switching setting without the user of end side, simplify user's operation.。

Accompanying drawing explanation

Fig. 1 is the flow chart of seamless handover method the first embodiment between cellular network of the present invention and WLAN;

Fig. 2 is the flow chart of seamless handover method the second embodiment between cellular network of the present invention and WLAN;

Fig. 3 is the flow chart of seamless handover method the 3rd embodiment between cellular network of the present invention and WLAN;

Fig. 4 is the flow chart of seamless handover method the 4th embodiment between cellular network of the present invention and WLAN;

Fig. 5 is the flow chart of seamless handover method the 5th embodiment between cellular network of the present invention and WLAN;

Fig. 6 is the structural representation of seamless switching device the first embodiment between cellular network of the present invention and WLAN;

Fig. 7 is the structural representation of seamless switching device the second embodiment between cellular network of the present invention and WLAN;

Fig. 8 is the structural representation of seamless switching device the 3rd embodiment between cellular network of the present invention and WLAN;

Fig. 9 is the structural representation of seamless switching device the 4th embodiment between cellular network of the present invention and WLAN;

Figure 10 is the structural representation of seamless switching client the first embodiment between cellular network of the present invention and WLAN.

Embodiment

Fig. 1 is the flow chart of seamless handover method the first embodiment between cellular network of the present invention and WLAN, as shown in Figure 1, seamless handover method between cellular network and WLAN that the present embodiment provides is carried out by the seamless switching device between cellular network and the WLAN of network side, this device is located on the server of network side, wireless controller (Wireless Access Point Controller is called for short AC) communication connection with WLAN.This device obtains the terminal positional information that end side reports, judge whether this terminal to switch to wlan network from cellular network according to terminal positional information, and issue switchover policy to terminal, make terminal without a direct-open WLAN search in the situation that, the directly indicated WLAN focus of access switchover policy, realize and complete the handoff procedure of terminal from Cellular Networks to wlan network without user's manual operation, improve the utilance of wlan network.This device can adopt the form of software and/or hardware to realize, and the method comprises:

Step S100, obtain the terminal positional information of terminal to report, bid associated data storehouse obtains the hotspot location information of each WLAN focus, according to the hotspot location information of described terminal positional information and each described WLAN focus, calculates the distance minimum value between described terminal and each described WLAN focus;

Step S102, judges describedly whether be less than predeterminable range threshold value apart from minimum value, enters step S104 if be less than described predeterminable range threshold value;

Step S104, judges whether the Policy Status of the described WLAN focus corresponding apart from minimum value is to allow described terminal access, if the Policy Status of described WLAN focus is for allowing described terminal access, enters step S106;

Step S106, issues switchover policy information to described terminal.

Particularly, in the seamless switching device between cellular network and WLAN, comprise linked database, store the hotspot location information of the WLAN focus of the whole network in linked database, hotspot location information is the information that indicates WLAN focus geographical position.Terminal to report terminal positional information is to this device, and terminal positional information is the information that indicates terminal seat reason position.This device obtains after the terminal positional information of terminal to report, opens the seamless switching operation between cellular network and WLAN, specifically comprises:

Bid associated data storehouse, obtain the hotspot location information of each WLAN focus, according to the hotspot location information of terminal positional information and each WLAN focus, calculate the distance between this terminal and each WLAN focus, feedback, apart from minimum value, then judges whether this is less than predeterminable range threshold value apart from minimum value.In the process communicating between terminal and WLAN focus, signal strength signal intensity can be accelerated along with the increase of distance decay, therefore, in the time that the distance between terminal and WLAN focus is excessive, between terminal and WLAN focus, cannot carry out proper communication.Apart from minimum value be less than predeterminable range threshold value represent terminal surrounding exist can proper communication WLAN focus.

In a preferred embodiment, predeterminable range threshold value is 100 meters.

When WLAN focus is during in heavy duty, terminal accesses the load that further increases the weight of this WLAN focus after WLAN focus again, easily causes terminal communication not smooth, the situations such as call drop.Network side system is according to the loading condition of WLAN focus in wlan network, and the Policy Status of real-time update WLAN focus, in the time that the load of some WLAN focuses exceedes preset value, changes to and do not allow new terminal access by the Policy Status of this WLAN focus.

Therefore in the time there is the WLAN focus of close together in terminal surrounding, need whether the Policy Status of the nearest WLAN focus of this terminal of further judging distance is to allow described terminal access, issue switchover policy information to terminal if allow, switchover policy information comprises the WLAN hot information of the WLAN focus corresponding apart from minimum value, as focus ID.Terminal, according to switchover policy information, is opened WLAN search, accesses the WLAN focus nearest apart from this terminal, completes the switching of Cellular Networks to wlan network.

In the technical scheme of the present embodiment, seamless switching device between cellular network and WLAN is by obtaining the terminal positional information of terminal, bid associated data storehouse obtains the hotspot location information of the whole network WLAN focus, according to terminal positional information and the nearest WLAN focus of hotspot location information judging distance terminal whether in the scope of predeterminable range threshold value, if further whether the nearest WLAN focus of judging distance terminal allows terminal access, if allowed, issue switchover policy information to this terminal, notify this terminal to open WLAN search, access this WLAN focus.Realize network side and carried out intelligent decision, formulate switchover policy information notification terminal access WLAN focus, thereby improve the utilance of wlan network, reduce the load pressure of cellular network, further, because switchover policy information is to be formulated by network side, therefore carry out loaded down with trivial details switching setting without the user of end side, simplify user's operation.

In a preferred embodiment, issue switchover policy information to described terminal by backstage short message channel.

Issue switchover policy information by backstage short message channel, neither need to change the host-host protocol of existing signalling path, can not make again user produce GPRS campus network.

Fig. 2 is the flow chart of seamless handover method the second embodiment between cellular network of the present invention and WLAN, and as shown in Figure 2, the present embodiment is carried out by the seamless switching device between cellular network and the WLAN of network side, and the method comprises:

Step S200, obtains the terminal positional information of terminal to report;

Step S202, judges whether the load of the residing Cellular Networks of described terminal community is greater than default cell load threshold value, if be greater than default cell load threshold value, enters step S204, if be not more than default cell load threshold value, flow process finishes;

Step S204, bid associated data storehouse obtains the hotspot location information of each WLAN focus, according to the hotspot location information of described terminal positional information and each described WLAN focus, calculates the distance minimum value between described terminal and each described WLAN focus;

Step S206, judges describedly whether be less than predeterminable range threshold value apart from minimum value;

Step S208, whether the Policy Status that described predeterminable range threshold value judges the described WLAN focus corresponding apart from minimum value if be less than is to allow described terminal access;

Step S210, if the Policy Status of described WLAN focus is for allowing described terminal access, issues switchover policy information to described terminal.

Particularly, seamless switching device between cellular network and WLAN gets after the terminal positional information of terminal to report, whether the cell load that first judges the residing Cellular Networks of terminal community is greater than default cell load threshold value, illustrate that the current residing Cellular Networks cell load of this terminal is lighter if be less than default cell load threshold value, without switching to wlan network, illustrate that the current residing Cellular Networks cell load of this terminal is heavier if be greater than default cell load threshold value, need to switch to wlan network.

In the time that the load of Cellular Networks community is heavier, this device starts the seamless switching operation between cellular network and WLAN, and concrete handover operation is identical with corresponding steps in the first embodiment.

In the technical scheme of the present embodiment, seamless switching device between cellular network and WLAN obtains after the terminal positional information of terminal, first judge that whether the Cellular Networks community at terminal place is in heavy duty, if start handover operation, this terminal is switched to the lighter wlan network of load from the heavier Cellular Networks community of load.Thereby realize network side and carried out intelligent decision, formulate switchover policy information notification terminal access WLAN focus, improve the utilance of wlan network, reduce the load pressure of cellular network, further, because switchover policy information is to be formulated by network side, therefore carry out loaded down with trivial details switching setting without the user of end side, simplify user's operation.

Fig. 3 is the flow chart of seamless handover method the 3rd embodiment between cellular network of the present invention and WLAN, and as shown in Figure 3, the present embodiment is carried out by the seamless switching device between cellular network and the WLAN of network side, and the method comprises:

Step S300, obtains the terminal positional information of terminal to report;

Step S302, inquires about described linked database and obtains the focus longitude and latitude of each WLAN focus;

Step S304, according to the focus longitude and latitude of described terminal latitude and longitude information and each described WLAN focus, calculates the distance between described terminal and each described WLAN focus, and feedback is apart from minimum value;

Step S306, judges describedly whether be less than predeterminable range threshold value apart from minimum value, enters step S308 if be less than described predeterminable range threshold value, if be greater than described predeterminable range threshold value flow process finish;

Step S308, whether the Policy Status that judges the described WLAN focus corresponding apart from minimum value is to allow described terminal access, if the Policy Status of described WLAN focus is for allowing described terminal access, enter step S310, if the Policy Status of described WLAN focus is not for allowing described terminal access, flow process finishes;

Step S310, issues switchover policy information to described terminal.

Particularly, terminal to report terminal positional information, wherein terminal positional information comprises the terminal latitude and longitude information that terminal GPS module reports.Seamless switching device between cellular network and WLAN obtains after the terminal latitude and longitude information that terminal GPS module reports, bid associated data storehouse, and wherein linked database comprises the focus longitude and latitude of each WLAN focus.Obtain the focus longitude and latitude of each WLAN focus of the whole network, according to the focus longitude and latitude of terminal latitude and longitude information and each WLAN focus, calculate the distance between terminal and each WLAN focus, feedback is apart from minimum value.

Step S306, S308 and S310 are identical with the corresponding steps flow process in above-described embodiment.

In the technical scheme of the present embodiment, seamless switching device between cellular network and WLAN is by obtaining the terminal latitude and longitude information of terminal, judge that according to terminal latitude and longitude information and focus longitude and latitude whether terminal surrounding has the WLAN focus that allows its access, formulates switchover policy information.Realize thus by network side and carry out intelligent decision, formulate switchover policy information notification terminal access WLAN focus, improve the utilance of wlan network, reduce the load pressure of cellular network, because switchover policy information is to be formulated by network side, therefore carry out loaded down with trivial details switching setting without the user of end side, simplified user's operation.Further, the terminal latitude and longitude information precision reporting due to GPS module is high, and therefore network side can accurately search out according to terminal longitude and latitude the WLAN focus of terminal surrounding, has improved the success rate that terminal is switched.

Further, terminal positional information also comprises the community ID of Cellular Networks community, described terminal place, also comprises community ID and the community latitude and longitude information of each Cellular Networks community in described linked database, before the method step S304, also comprises:

Step S312, judges that whether described terminal latitude and longitude information is invalid, if described terminal latitude and longitude information is invalid, enters step S314, if described terminal latitude and longitude information is effective, enters step S304;

Step S314, inquires about described linked database according to described terminal positional information Zhong community ID and obtains the described community latitude and longitude information that described community ID is corresponding;

Step S316, according to the focus longitude and latitude of described community latitude and longitude information and each WLAN focus, calculates the distance between described terminal and each described WLAN focus, and feedback, apart from minimum value, enters step S306.

Particularly, terminal to report terminal positional information is to the seamless switching device between cellular network and WLAN, and wherein terminal positional information comprises the community ID of terminal latitude and longitude information and Cellular Networks community, terminal place.First this device judges that whether terminal latitude and longitude information is effective, and in the time that terminal does not have GPS module or terminal to be positioned at without gps signal region, in the terminal positional information reporting, terminal latitude and longitude information is invalid.In the time that terminal latitude and longitude information is invalid, judge the geographical position at terminal place according to the community ID of terminal to report.

According to ID bid associated data storehouse, community, linked database comprises community ID and the community latitude and longitude information of the focus longitude and latitude of each WLAN focus, each Cellular Networks community, obtains the community latitude and longitude information of community, terminal place.According to the focus longitude and latitude of community latitude and longitude information and each WLAN focus, calculate the distance between Cellular Networks community and each WLAN focus at terminal place, and feedback is apart from minimum value.In the time that the terminal latitude and longitude information in terminal positional information is effective, preferential selection carried out the distance between computing terminal and each WLAN focus according to the focus longitude and latitude of terminal latitude and longitude information and each WLAN focus.

The terminal latitude and longitude information accuracy reporting due to GPS module is very high, therefore, in the time that the latitude and longitude information of terminal to report is effective, preferentially determines the position of terminal according to terminal latitude and longitude information.But in part terminal, there is no GPS module, or in the time that terminal enters the region without gps signal, have the situation that terminal cannot the on-site longitude and latitude of reporting terminal.Therefore in the time that the terminal latitude and longitude information of terminal to report is invalid, supplement the position of determining terminal with community longitude and latitude, can also obtain by other means available terminal positional information thereby realized in the time that terminal is located unsuccessfully by GPS.

Fig. 4 is the flow chart of seamless handover method the 4th embodiment between cellular network of the present invention and WLAN, and as shown in Figure 4, the present embodiment is carried out by the seamless switching device between cellular network and the WLAN of network side, and the method comprises:

Step S400, according to predetermined period, obtain the described WLAN focus of access total number of users, access the service-user number and the type of service that in the user of described WLAN focus, are using business, set the business weighted value of each type of service according to the size of the shared Internet resources of each type of service;

Step S402, according to the plan area coverage of described total number of users and WLAN focus, calculate user density, according to described service-user number and described total number of users, computing service permeability, the type of service using according to the user of described business weighted value and the described WLAN focus of access is calculated total business weight of described WLAN focus;

Step S404, judges whether described user density is greater than default density threshold value, the Policy Status of described WLAN focus is made as to the described terminal access of permission if be not more than default density threshold value, enters step S406 if be greater than default density threshold value;

Step S406, judge whether described penetration of service rate is greater than default permeability threshold value, the Policy Status of described WLAN focus is made as to the described terminal access of permission if be not more than default permeability threshold value, enters step S408 if be greater than default permeability threshold value;

Step S408, judges whether described total business weight is greater than default weight threshold value, the Policy Status of described WLAN focus is made as to the described terminal access of permission if be not more than described default weight threshold value, enters step S410; The Policy Status of described WLAN focus is made as and does not allow the access of described terminal if be greater than described default weight threshold value, enter step S410.

Step S410, obtain the terminal positional information of terminal to report, bid associated data storehouse obtains the hotspot location information of each WLAN focus, according to the hotspot location information of described terminal positional information and each described WLAN focus, calculates the distance minimum value between described terminal and each described WLAN focus;

Step S412, judges describedly whether be less than predeterminable range threshold value apart from minimum value, enters step S414 if be less than described predeterminable range threshold value, if be greater than predeterminable range threshold value flow process finish;

Step S414, whether the Policy Status that judges the described WLAN focus corresponding apart from minimum value is to allow described terminal access, if the Policy Status of described WLAN focus is for allowing described terminal access, enter step S416, if the Policy Status of described WLAN focus is not for allowing described terminal access, flow process finishes;

Step S416, issues switchover policy information to described terminal.

Particularly, in focus slip condition database in seamless switching device between cellular network and WLAN, store the Policy Status of the whole network WLAN focus, this device gathers the parameter information of the whole network WLAN focus according to predetermined period, and according to the Policy Status of the parameter information acquisition WLAN focus of WLAN focus, the Policy Status of each WLAN focus in focus slip condition database is upgraded in timing, and concrete grammar is as follows:

This device and each WLAN AC communication connection, each WLAN AC is according to the service-user number and the type of service that are using business in the user of total number of users of default the acquisition granularity collection access WLAN focus, access WLAN focus, WLAN AC is sent to the seamless switching device between cellular network and WLAN according to predetermined period by above-mentioned parameter, and predetermined period equals the acquisition granularity of WLAN AC.Set the business weighted value of each type of service according to the size of the shared Internet resources of each type of service, for example, set the business weighted value of each type of service according to the shared network bandwidth of each type of service or required bearer rate.

According to the plan area coverage of total number of users and WLAN focus, calculate user density, user density equals total number of users and the ratio of intending area coverage.According to service-user number and total number of users, computing service permeability, penetration of service rate equals the ratio of service-user number and total number of users.The type of service using according to the user of business weighted value and access WLAN focus is calculated total business weight of WLAN focus.

According to default three threshold values of the factor that affects the load of WLAN focus, comprise default density threshold value, default permeability threshold value and default weight threshold value.The above-mentioned parameter of WLAN focus and three default threshold values are compared, thereby determine the Policy Status of this WLAN focus, wherein Policy Status is divided into and allows terminal access and do not allow terminal access, and further arranging and allowing terminal access is 1, and not allowing terminal access is 0.Concrete determination methods is as follows:

Judge whether user density is greater than default density threshold value, illustrate that the total number of users of this WLAN focus access is less if be not more than default density threshold value, therefore the Policy Status of WLAN focus is made as and allows described terminal access; Illustrate that the total number of users of this WLAN focus access is more if be greater than default density threshold value.

Further judge whether penetration of service rate is greater than default permeability threshold value, if be not more than default permeability threshold value, illustrate in this WLAN focus and using the number of users of business less, therefore the Policy Status of WLAN focus is made as and allows described terminal access; If be greater than default permeability threshold value, illustrate in this WLAN focus and using the number of users of business more.

Further judge whether total business weight is greater than default weight threshold value, although illustrate that the number of users of use business in this WLAN focus is more if be not more than default weight threshold value, but the Internet resources of the service needed that this user uses are less, therefore the Policy Status of WLAN focus is made as and allows described terminal access, illustrate that this WLAN focus uses the number of users of business more if be greater than default weight threshold value, and the Internet resources of the service needed that uses are more, therefore the Policy Status of WLAN focus are made as and do not allow described terminal access.

In a preferred embodiment, in the time that user density is greater than default density threshold value and penetration of service rate and is greater than default permeability threshold value, periodically calculate total business weight of this WLAN focus, occur that if continuous total operational authority is great in default weight threshold value for three times, the Policy Status of this WLAN focus is made as and does not allow described terminal access.

In the focus slip condition database of the seamless switching device between cellular network and WLAN, store the Policy Status of the whole network WLAN focus, and the Policy Status of each WLAN focus is upgraded in timing.When terminal to report terminal positional information is to this device, this device obtains apart from after the nearest WLAN focus of terminal through calculating, the Policy Status of this WLAN focus in inquiry focus slip condition database, and whether the Policy Status that judges this WLAN focus be the access of operation terminal, if issue switchover policy information to terminal.Wherein step S410 is identical with the flow process of corresponding steps in above-described embodiment to step S416.

In the technical scheme of the present embodiment, seamless switching device between cellular network and WLAN is by obtaining the terminal latitude and longitude information of terminal, judge according to terminal latitude and longitude information and focus longitude and latitude whether terminal surrounding has the WLAN focus that allows its access, and further formulate switchover policy information.Realize thus by network side and carry out intelligent decision, formulate switchover policy information notification terminal access WLAN focus, improve the utilance of wlan network, reduce the load pressure of cellular network, because switchover policy information is to be formulated by network side, therefore carry out loaded down with trivial details switching setting without the user of end side, simplified user's operation.Further, the terminal latitude and longitude information precision reporting due to GPS module is high, and therefore network side can accurately search out according to terminal longitude and latitude the WLAN focus of terminal surrounding, has improved the success rate that terminal is switched.

Further, after step S414, also comprise:

If the Policy Status of WLAN focus, for not allowing described terminal access, enters step S418;

Step S418, judge whether be to allow described terminal access with terminal apart from the Policy Status of other WLAN focuses that are less than predeterminable range threshold value, if the Policy Status of other WLAN focuses is for allowing described terminal access, enter step S416, if the Policy Status of other WLAN focuses is not for allowing described terminal access, flow process finishes.

Particularly, when the Policy Status of the WLAN focus nearest apart from terminal is not when allowing terminal access, illustrate that this WLAN focus is in heavy duty, the Policy Status of other WLAN focuses that this WLAN focus is closed on judges, if the Policy Status of other WLAN focuses is for allowing terminal access, other WLAN focuses that close on, in underload, issue switchover policy information to terminal, and notification terminal accesses other WLAN focuses that close on.

When nearest WLAN focus is during in heavy duty, by newly request access terminal be dispatched to close in underloaded other WLAN focuses, thereby play the effect of wlan network load balancing.

Fig. 5 is the flow chart of seamless handover method the 5th embodiment between cellular network of the present invention and WLAN, and as shown in Figure 5, the method is by the seamless switching client executing of end side, and the method comprises:

Step S500, the business datum connection status of monitor terminal, when the business datum connection status of obtaining described terminal is activated, the residence time of described terminal in current Cellular Networks community;

Step S502, judges whether the described residence time be greater than the default residence time, enters step S504 if be greater than the default residence time, if be less than the default residence time flow process finish;

Step S504, reporting terminal positional information is to server, for the seamless switching operation between described startup of server cellular network and WLAN;

Step S506, obtains the switchover policy information that server issues, and according to described switchover policy information, opens WLAN search, disconnects Cellular Networks data and connects, access WLAN focus.

Particularly, the business datum connection status of seamless switching client monitor terminal, as PDP state of activation, in the time that the business datum connection status of terminal is activated, there is business data flow in this terminal.Obtain the residence time of this terminal in current Cellular Networks community, after wherein the residence time refers to that the business datum connection status of terminal is activated, the time stopping in current Cellular Networks community.Judge whether this terminal residence time in current Cellular Networks community be greater than the default residence time,, operate for startup of server seamless switching to server if be greater than reporting terminal positional information.

In a preferred embodiment, terminal positional information comprises the terminal latitude and longitude information that described terminal GPS module is obtained.

In a preferred embodiment, terminal positional information comprises the community ID of Cellular Networks community, described terminal place.

In the technical scheme of the present embodiment, seamless switching client is by the business datum connection status of monitor terminal, in the time finding that terminal is brought into use business, judge the time of staying of this terminal in current Cellular Networks community, in the time that the time of staying is greater than the default residence time, just allow to carry out seamless switching, prevent the invalid switching of terminal in the time of high-speed moving state.

In a preferred embodiment, seamless switching client is passed through backstage short message channel reporting terminal positional information to server.

To server, neither need to change the host-host protocol of existing signalling path by backstage short message channel reporting terminal positional information, can not make again user produce GPRS campus network.

Fig. 6 is the structural representation of seamless switching device the first embodiment between cellular network of the present invention and WLAN, as shown in Figure 6, this device is located on network side server, be connected with WLAN AC devices communicating, this device comprises processing module 10, Distance Judgment module 12, WLAN Policy Status judge module 14, and issue module 16, wherein:

Processing module 10, for obtaining the terminal positional information of terminal to report, bid associated data storehouse obtains the hotspot location information of each WLAN focus, according to the hotspot location information of described terminal positional information and each described WLAN focus, calculate the distance minimum value between described terminal and each described WLAN focus;

Whether Distance Judgment module 12, be describedly less than predeterminable range threshold value apart from minimum value for judging, if be less than described predeterminable range threshold value, and notice WLAN Policy Status judge module 14;

Whether WLAN Policy Status judge module 14 is to allow described terminal access for the Policy Status that judges the described WLAN focus corresponding apart from minimum value;

Issue module 16, if be the described terminal access of permission for the Policy Status of described WLAN focus, issue switchover policy information to described terminal, described switchover policy information comprises the described WLAN hot information that allows described terminal access, open WLAN search for described terminal according to described switchover policy information, access described WLAN focus, complete the switching from Cellular Networks to WLAN.

Wherein, processing module 10 is connected with Distance Judgment module 12, and Distance Judgment module 12 is connected with WLAN Policy Status judge module 14, WLAN Policy Status judge module 14 with issue module 16 and be connected.

Processing module 10 is obtained after the terminal positional information of terminal to report, bid associated data storehouse obtains the hotspot location information of each WLAN focus, calculate the distance obtaining between terminal and each WLAN focus according to the hotspot location information of terminal positional information and each WLAN focus, feedback is apart from minimum value.Transmission range minimum value is to Distance Judgment module 12, and whether Distance Judgment module 12 judging distance minimum values are less than predeterminable range threshold value.If be greater than, finish seamless switching operation, if be less than, the information of WLAN focus corresponding to transmission range minimum value is to WLAN Policy Status judge module 14, and notify whether the Policy Status that WLAN Policy Status 14 judge modules judge this WLAN focus is to allow terminal access, if allowed, notify to issue module 16 and issue switchover policy information to terminal, wherein switchover policy information comprises the described WLAN hot information that allows described terminal access, open WLAN search for described terminal according to described switchover policy information, access described WLAN focus, complete the switching from Cellular Networks to WLAN.

In a preferred embodiment, predeterminable range threshold value is 100 meters.

Seamless switching device between cellular network and WLAN that various embodiments of the present invention provide, for the seamless handover method between the cellular network and the WLAN that carry out the embodiment of the present invention and provide, possesses corresponding functional module, does not repeat them here.

Fig. 7 is the structural representation of seamless switching device the second embodiment between cellular network of the present invention and WLAN, as shown in Figure 7, this device is located on network side server, be connected with WLAN AC devices communicating, this device comprises processing module 20, Distance Judgment module 22, WLAN Policy Status judge module 24, issue module 26, and cell load judge module 28, wherein processing module 20, Distance Judgment module 22, WLAN Policy Status judge module 24, and the annexation that issues module 26 is identical with corresponding functional module in above-described embodiment with function, repeat no more.

Cell load judge module 28, for judging whether the load of the residing Cellular Networks of described terminal community is greater than default cell load threshold value;

If be greater than default cell load threshold value, notify Distance Judgment module 22 to start the seamless switching between cellular network and WLAN.

Particularly, cell load judge module 28 is connected with processing module 20, processing module 20 gets after the terminal positional information of terminal to report, notifying cell load judgment module 28 judges whether the cell load of the residing Cellular Networks of terminal community is greater than default cell load threshold value, illustrate that the current residing Cellular Networks cell load of this terminal is lighter if be less than default cell load threshold value, without switching to wlan network, flow process finishes; Illustrate that the current residing Cellular Networks cell load of this terminal is heavier if be greater than default cell load threshold value, notification handler module 20 starts seamless switching operation, and concrete handover operation is identical with corresponding steps in the first embodiment.

Fig. 8 is the structural representation of seamless switching device the 3rd embodiment between cellular network of the present invention and WLAN, as shown in Figure 8, this device is located on network side server, is connected with WLAN AC devices communicating, this device comprises processing module 30, Distance Judgment module 32, WLAN Policy Status judge module 34, issues module 36, wherein Distance Judgment module 32, WLAN Policy Status judge module 34, and it is identical with corresponding functional module in above-described embodiment to issue the function of module 36, repeats no more.

Processing module 30 comprises acquiring unit 301, the first query unit 302, and the first computing unit 303, wherein:

The first acquiring unit 301, for obtaining the terminal positional information of terminal to report;

The first query unit 302, obtains the focus longitude and latitude of each WLAN focus for inquiring about described linked database;

The first computing unit 303, for according to the focus longitude and latitude of described terminal latitude and longitude information and each described WLAN focus, calculates the distance between described terminal and each described WLAN focus, and feedback is apart from minimum value.

Particularly, terminal to report terminal positional information is to processing module 30, and wherein terminal positional information comprises the terminal latitude and longitude information that terminal GPS module reports.Acquiring unit 301 in processing module 30 obtains after the terminal latitude and longitude information that terminal GPS module reports, notify the first query unit 302 bid associated data storehouses, wherein linked database comprises the focus longitude and latitude of each WLAN focus, obtains the focus longitude and latitude of each WLAN focus of the whole network.The first query unit 302 sends focus longitude and latitude to the first computing unit 303 of each WLAN focus, the first computing unit 303 is according to the focus longitude and latitude of terminal latitude and longitude information and each WLAN focus, calculate the distance between terminal and each WLAN focus, feedback is apart from minimum value to Distance Judgment module 32, and whether Distance Judgment module 32 judging distance minimum values are less than predeterminable range threshold value.

Further, processing module 30 also comprises:

Whether terminal longitude and latitude judging unit 304 is invalid for judging described terminal latitude and longitude information;

The second query unit 305, if invalid for described terminal latitude and longitude information, inquire about described linked database according to described terminal positional information Zhong community ID and obtains the described community latitude and longitude information that described community ID is corresponding;

The second computing unit 306, for according to the focus longitude and latitude of described community latitude and longitude information and each WLAN focus, calculates the distance between described terminal and each described WLAN focus, and feedback is apart from minimum value.

Particularly, terminal to report terminal positional information is to the acquiring unit 301 of processing module 30, and wherein terminal positional information comprises community ID and the terminal latitude and longitude information of Cellular Networks community, terminal place.Acquiring unit 301 transmitting terminal latitude and longitude information are to terminal longitude and latitude judging unit 304, and terminal longitude and latitude judging unit 304 judges that whether the terminal latitude and longitude information of terminal to report is invalid.If the invalid acquiring unit 301 of notifying of terminal latitude and longitude information sends community ID to the second query unit 305, the second query unit 305 obtains according to ID bid associated data storehouse, community the community latitude and longitude information that this community ID is corresponding, and wherein linked database comprises community ID and the community latitude and longitude information of the focus longitude and latitude of each WLAN focus, each Cellular Networks community.The second query unit 305 sends community latitude and longitude information to the second computing unit 306, the focus longitude and latitude of each WLAN focus that the second computing unit 306 sends according to community latitude and longitude information and the first query unit 302, distance between computing terminal and each WLAN focus, feeds back apart from minimum value to Distance Judgment module 32.

If terminal latitude and longitude information is effectively notified the first acquiring unit 301 transmitting terminal latitude and longitude information to the first computing units 303, the focus longitude and latitude of each WLAN focus that the first computing unit 303 sends according to the first query unit 302 and terminal latitude and longitude information, distance between computing terminal and each WLAN focus, feeds back apart from minimum value to Distance Judgment module 32.

The terminal latitude and longitude information accuracy reporting due to GPS module is high, therefore, in the time that the latitude and longitude information of terminal to report is effective, preferentially determines the position of terminal according to terminal latitude and longitude information.But in part terminal, there is no GPS module, or in the time that terminal enters the region without gps signal, have the situation that terminal cannot the on-site longitude and latitude of reporting terminal.Therefore in the time that the terminal latitude and longitude information of terminal to report is invalid, supplement the position of determining terminal with community longitude and latitude, can also obtain by other means available terminal positional information thereby realized in the time that terminal is located unsuccessfully by GPS.

Fig. 9 is the structural representation of seamless switching device the 4th embodiment between cellular network of the present invention and WLAN, and as shown in Figure 9, this device is located on network side server, be connected with WLAN AC devices communicating, this device comprises parameter acquisition module 40, parameter calculating module 41, user density judge module 42, penetration of service rate judge module 43, total heavy judge module 44 of operational authority, processing module 45, Distance Judgment module 46, WLAN Policy Status judge module 47, and issue module 48.Wherein processing module 45, Distance Judgment module 46, WLAN Policy Status judge module 47, and it is identical with corresponding functional module in above-described embodiment to issue the function of module 48, repeats no more.

Parameter acquisition module 40, be used for according to predetermined period, obtain the described WLAN focus of access total number of users, access the service-user number and the type of service that in the user of described WLAN focus, are using business, set the business weighted value of each type of service according to the size of the shared Internet resources of each type of service;

Parameter calculating module 41, be used for according to the plan area coverage of described total number of users and WLAN focus, calculate user density, according to described service-user number and described total number of users, computing service permeability, the type of service using according to the user of described business weighted value and the described WLAN focus of access is calculated total business weight of described WLAN focus;

User density judge module 42, for judging whether described user density is greater than default density threshold value, is made as the Policy Status of described WLAN focus the described terminal access of permission if be not more than default density threshold value;

Penetration of service rate judge module 43, if judge for being greater than default density threshold value whether described penetration of service rate is greater than default permeability threshold value, the Policy Status of described WLAN focus is made as to the described terminal access of permission if be not more than default permeability threshold value;

Total heavy judge module 44 of operational authority, if judge for being greater than default permeability threshold value whether described total business weight is greater than default weight threshold value, the Policy Status of described WLAN focus is made as and allows the access of described terminal if be not more than described default weight threshold value, the Policy Status of described WLAN focus is made as and does not allow described terminal access if be greater than described default weight threshold value.

This device and each WLAN AC communication connection, each WLAN AC is according to the service-user number and the type of service that are using business in the user of total number of users of default the acquisition granularity collection access WLAN focus, access WLAN focus, WLAN AC is sent to parameter acquisition module 40 according to predetermined period by above-mentioned parameter, and predetermined period equals the acquisition granularity of WLAN AC.Parameter acquisition module 40 is set the business weighted value of each type of service according to the size of the shared Internet resources of each type of service, for example, set the business weighted value of each type of service according to the shared network bandwidth of each type of service or required bearer rate.Parameter acquisition module 40 sends above-mentioned parameter information to parameter calculating module 41.

Parameter calculating module 41, according to the plan area coverage of total number of users and WLAN focus, is calculated user density, and user density equals total number of users and the ratio of intending area coverage.According to service-user number and total number of users, computing service permeability, penetration of service rate equals the ratio of service-user number and total number of users.The type of service using according to the user of business weighted value and access WLAN focus is calculated total business weight of WLAN focus.Parameter calculating module 41, according to default three threshold values of the factor that affects the load of WLAN focus, comprises default density threshold value, default permeability threshold value and default weight threshold value.

Parameter calculating module 41 sends threshold value that the above-mentioned calculating of WLAN focus obtains and default threshold value to user density judge module 42, penetration of service rate judge module 43, and total heavy judge module 44 of operational authority.The above-mentioned parameter of WLAN focus and three default threshold values are compared, thereby determine the Policy Status of this WLAN focus, wherein Policy Status is divided into and allows terminal access and do not allow terminal access, and further arranging and allowing terminal access is 1, and not allowing terminal access is 0.Concrete determination methods is as follows:

User density judge module 42 judges whether user density is greater than default density threshold value, illustrates that the total number of users of this WLAN focus access is less if be not more than default density threshold value, and the Policy Status of WLAN focus is made as and allows described terminal access; Illustrate that the total number of users of this WLAN focus access is more if be greater than default density threshold value, informing business permeability judge module 43 further judges.

Penetration of service rate judge module 43 judges whether penetration of service rate is greater than default permeability threshold value, if be not more than default permeability threshold value, illustrate in this WLAN focus and using the number of users of business less, the Policy Status of WLAN focus is made as and allows described terminal access; If be greater than default permeability threshold value, illustrate in this WLAN focus and using the number of users of business more, notify the heavy judge module 44 of total operational authority further to judge.

Total heavy judge module 44 of operational authority judges whether total business weight is greater than default weight threshold value, although illustrate that the number of users of use business in this WLAN focus is more if be not more than default weight threshold value, but the Internet resources of the service needed that this user uses are less, the Policy Status of WLAN focus is made as and allows described terminal access, illustrate that this WLAN focus uses the number of users of business more if be greater than default weight threshold value, and the Internet resources of the service needed that uses are more, the Policy Status of WLAN focus is made as and does not allow described terminal access.

In a preferred embodiment, in the time that user density is greater than default density threshold value and penetration of service rate and is greater than default permeability threshold value, the heavy judge module 44 of total operational authority periodically calculates total business weight of this WLAN focus, occur that if continuous total operational authority is great in default weight threshold value for three times, the Policy Status of this WLAN focus is made as and does not allow described terminal access.

In the focus slip condition database of the seamless switching device between cellular network and WLAN, store the Policy Status of the whole network WLAN focus, the Policy Status of each WLAN focus is upgraded in timing.When terminal to report terminal positional information is to processing module 45, the distance minimum value between processing module 45 computing terminals and nearest WLAN focus is also sent to Distance Judgment module 46.Whether Distance Judgment module 46 judging distance minimum values are less than predeterminable range threshold value, the Policy Status of notifying WLAN Policy Status judge module 47 to inquire about this WLAN focus in focus slip condition database if be less than, judges whether the Policy Status of this WLAN focus is the access of operation terminal.If notice issues module 48 and issues switchover policy information to terminal.

Further, the seamless switching device between cellular network and WLAN also comprises WLAN balance module 49, WLAN balance module 49 and WLAN Policy Status judge module 47 with issue module 48 and be connected, wherein:

WLAN balance module 49, for judging whether be to allow described terminal access with terminal apart from the Policy Status of other WLAN focuses that are less than predeterminable range threshold value.

Particularly, when the Policy Status of the nearest WLAN focus of WLAN Policy Status judge module 47 judging distance terminals is not when allowing terminal access, the Policy Status of other WLAN focuses that notice WLAN balance module 49 closes on this WLAN focus judges.If the Policy Status of other WLAN focuses is for allowing terminal access, other WLAN focuses that close on are in underload, notice issues module 48 and issues switchover policy information to terminal, notification terminal accesses other WLAN focuses that close on, and switchover policy information comprises the WLAN hot information that allows described terminal access.

Figure 10 is the structural representation of seamless switching client the first embodiment between cellular network of the present invention and WLAN, comprises and monitors module 50, and residence time judge module 51, reporting module 52, and handover module 53, wherein:

Monitor module 50, for the business datum connection status of monitor terminal, when the business datum connection status of obtaining described terminal is activated, the residence time of described terminal in current Cellular Networks community;

Residence time judge module 51, presets the residence time for judging whether the described residence time is greater than, if be greater than default notice reporting module of residence time;

Reporting module 52,, operates for the seamless switching between described startup of server cellular network and WLAN to server for reporting terminal positional information;

Handover module 53, the switchover policy information issuing for obtaining server, according to described switchover policy information, opens WLAN search, disconnects Cellular Networks data and connects, access WLAN focus.

Particularly, monitor the business datum connection status of module 50 monitor terminals, as PDP state of activation, in the time that the business datum connection status of terminal is activated, there is business data flow in this terminal.Monitor module 50 and obtain the residence time of this terminal in current Cellular Networks community, after wherein the residence time refers to that the business datum connection status of terminal is activated, the time stopping in current Cellular Networks community.Monitor module 50 and send residence time to residence time judge module 51, residence time judge module 51 judges whether this terminal residence time in current Cellular Networks community is greater than the default residence time, if being greater than notice reporting module 52 reporting terminal positional informations, to server, operates for startup of server seamless switching.Server issues switchover policy information to handover module 53, and the switchover policy information that handover module 53 issues according to server is opened WLAN search, disconnects Cellular Networks data and connects, the WLAN focus of indicating in access server switchover policy information.

It should be noted that: above embodiment is only unrestricted in order to the present invention to be described, the present invention is also not limited in above-mentioned giving an example, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in claim scope of the present invention.

Claims

1. the seamless handover method between cellular network and WLAN, is characterized in that, comprising:

2. the seamless handover method between cellular network according to claim 1 and WLAN, is characterized in that, described in obtain the terminal positional information step of terminal to report after, also comprise:

Whether the load that judges the residing Cellular Networks of described terminal community is greater than default cell load threshold value;

If be greater than default cell load threshold value, start the seamless switching between cellular network and WLAN.

3. the seamless handover method between cellular network according to claim 1 and WLAN, is characterized in that, described terminal positional information comprises the terminal latitude and longitude information that terminal GPS module reports, and described linked database comprises the focus longitude and latitude of each WLAN focus;

Described bid associated data storehouse obtains the hotspot location information of each WLAN focus, according to the hotspot location information of described terminal positional information and each described WLAN focus, calculates the distance minimum value step between described terminal and each described WLAN focus, comprising:

Inquire about the focus longitude and latitude that described linked database obtains each WLAN focus;

According to the focus longitude and latitude of described terminal latitude and longitude information and each described WLAN focus, calculate the distance between described terminal and each described WLAN focus, feedback is apart from minimum value.

4. the seamless handover method between cellular network according to claim 3 and WLAN, it is characterized in that, described terminal positional information also comprises the community ID of Cellular Networks community, described terminal place, also comprises community ID and the community latitude and longitude information of each Cellular Networks community in described linked database;

Described according to the focus longitude and latitude of described terminal latitude and longitude information and each described WLAN focus, calculate the distance between described terminal and each described WLAN focus, feedback, apart from before minimum value step, also comprises:

Judge that whether described terminal latitude and longitude information is invalid;

If described terminal latitude and longitude information is invalid, inquires about described linked database according to described terminal positional information Zhong community ID and obtain the described community latitude and longitude information that described community ID is corresponding;

According to the focus longitude and latitude of described community latitude and longitude information and each WLAN focus, calculate the distance between described terminal and each described WLAN focus, feedback is apart from minimum value;

If described terminal latitude and longitude information is effective, according to the focus longitude and latitude of described terminal latitude and longitude information and each described WLAN focus, calculate the distance between described terminal and each described WLAN focus, feedback is apart from minimum value.

5. the seamless handover method between cellular network according to claim 1 and WLAN, is characterized in that, described in obtain the terminal positional information step of terminal to report before, also comprise:

According to predetermined period, obtain the described WLAN focus of access total number of users, access the service-user number and the type of service that in the user of described WLAN focus, are using business, set the business weighted value of each type of service according to the size of the shared Internet resources of each type of service;

According to the plan area coverage of described total number of users and WLAN focus, calculate user density, according to described service-user number and described total number of users, computing service permeability, the type of service using according to the user of described business weighted value and the described WLAN focus of access is calculated total business weight of described WLAN focus;

Judge whether described user density is greater than default density threshold value, the Policy Status of described WLAN focus is made as to the described terminal access of permission if be not more than default density threshold value;

Judge whether described penetration of service rate is greater than default permeability threshold value if be greater than default density threshold value, the Policy Status of described WLAN focus is made as to the described terminal access of permission if be not more than default permeability threshold value;

Judge whether described total business weight is greater than default weight threshold value if be greater than default permeability threshold value, the Policy Status of described WLAN focus is made as and allows the access of described terminal if be not more than described default weight threshold value, the Policy Status of described WLAN focus is made as and does not allow described terminal access if be greater than described default weight threshold value.

6. the seamless handover method between cellular network according to claim 1 and WLAN, it is characterized in that, after being less than Policy Status that described predeterminable range threshold value judges the described WLAN focus corresponding apart from minimum value if described and being whether and allowing described terminal access step, also comprise:

If the Policy Status of described WLAN focus for not allowing described terminal access, judges whether be to allow described terminal access with terminal apart from the Policy Status of other WLAN focuses that are less than predeterminable range threshold value;

If the Policy Status of other WLAN focuses, for allowing described terminal access, issues switchover policy information to described terminal, described switchover policy information comprises the WLAN hot information that allows described terminal access.

7. according to the seamless handover method between claim 1-6 arbitrary described cellular network and WLAN, it is characterized in that, issue switchover policy information to described terminal by backstage short message channel.

8. the seamless handover method between cellular network and WLAN, is characterized in that, comprising:

9. the seamless handover method between cellular network according to claim 8 and WLAN, is characterized in that, described terminal positional information comprises the terminal latitude and longitude information that described terminal GPS module is obtained.

10. the seamless handover method between cellular network according to claim 9 and WLAN, is characterized in that, described terminal positional information also comprises the community ID of Cellular Networks community, described terminal place.

Seamless handover method between 11. according to Claim 8-10 arbitrary described cellular network and WLAN, is characterized in that, reports described terminal positional information to server by backstage short message channel.

Seamless switching device between 12. 1 kinds of cellular networks and WLAN, is characterized in that, comprising:

Seamless switching device between 13. cellular networks according to claim 12 and WLAN, is characterized in that, also comprises:

Cell load judge module, for judging whether the load of the residing Cellular Networks of described terminal community is greater than default cell load threshold value;

If be greater than default cell load threshold value, notify described Distance Judgment module to start the seamless switching between cellular network and WLAN.

Seamless switching device between 14. cellular networks according to claim 12 and WLAN, it is characterized in that, described terminal positional information comprises the terminal latitude and longitude information that terminal GPS module reports, and described linked database comprises the focus longitude and latitude of each WLAN focus;

Described processing module comprises:

Acquiring unit, for obtaining the terminal positional information of terminal to report;

The first query unit, obtains the focus longitude and latitude of each WLAN focus for inquiring about described linked database;

The first computing unit, for according to the focus longitude and latitude of described terminal latitude and longitude information and each described WLAN focus, calculates the distance between described terminal and each described WLAN focus, and feedback is apart from minimum value.

Seamless switching device between 15. cellular networks according to claim 14 and WLAN, it is characterized in that, described terminal positional information also comprises the community ID of Cellular Networks community, described terminal place, also comprises community ID and the community latitude and longitude information of each Cellular Networks community in described linked database;

Described processing module also comprises:

Whether terminal longitude and latitude judging unit is invalid for judging described terminal latitude and longitude information;

The second query unit, if invalid for described terminal latitude and longitude information, inquire about described linked database according to described terminal positional information Zhong community ID and obtains the described community latitude and longitude information that described community ID is corresponding;

The second computing unit, for according to the focus longitude and latitude of described community latitude and longitude information and each WLAN focus, calculates the distance between described terminal and each described WLAN focus, and feedback is apart from minimum value;

If described terminal latitude and longitude information is effective, notify described the first computing unit to calculate described apart from minimum value.

Seamless switching device between 16. cellular networks according to claim 12 and WLAN, is characterized in that, described device also comprises:

Parameter acquisition module, be used for according to predetermined period, obtain the described WLAN focus of access total number of users, access the service-user number and the type of service that in the user of described WLAN focus, are using business, set the business weighted value of each type of service according to the size of the shared Internet resources of each type of service;

Parameter calculating module, be used for according to the plan area coverage of described total number of users and WLAN focus, calculate user density, according to described service-user number and described total number of users, computing service permeability, the type of service using according to the user of described business weighted value and the described WLAN focus of access is calculated total business weight of described WLAN focus;

User density judge module, for judging whether described user density is greater than default density threshold value, is made as the Policy Status of described WLAN focus the described terminal access of permission if be not more than default density threshold value;

Penetration of service rate judge module, if judge for being greater than default density threshold value whether described penetration of service rate is greater than default permeability threshold value, the Policy Status of described WLAN focus is made as to the described terminal access of permission if be not more than default permeability threshold value;

The heavy judge module of total operational authority, if judge for being greater than default permeability threshold value whether described total business weight is greater than default weight threshold value, the Policy Status of described WLAN focus is made as and allows the access of described terminal if be not more than described default weight threshold value, the Policy Status of described WLAN focus is made as and does not allow described terminal access if be greater than described default weight threshold value.

Seamless switching device between 17. cellular networks according to claim 12 and WLAN, is characterized in that, described device also comprises:

WLAN balance module, if for the Policy Status of described WLAN focus for not allowing described terminal access, judge whether the Policy Status that is less than other WLAN focuses of predeterminable range threshold value with terminal distance is to allow described terminal to access;

Described issue module also for, if the Policy Status of other WLAN focuses is for allowing the access of described terminal, issue switchover policy information to described terminal, described switchover policy information comprises the WLAN hot information that allows described terminal access.

18. according to the seamless switching device between claim 12-17 arbitrary described cellular network and WLAN, it is characterized in that, issues switchover policy information to described terminal by backstage short message channel.

Seamless switching client between 19. 1 kinds of cellular networks and WLAN, is characterized in that, comprising:

Seamless switching client between 20. cellular networks according to claim 19 and WLAN, is characterized in that, described terminal positional information comprises the terminal latitude and longitude information that described terminal GPS module is obtained.

Seamless switching client between 21. cellular networks according to claim 19 and WLAN, is characterized in that, described terminal positional information also comprises the community ID of Cellular Networks community, described terminal place.

Seamless switching client between 22. cellular networks according to claim 19 and WLAN, is characterized in that, described reporting module reports described terminal positional information to server by backstage short message channel.