CN105636069A

CN105636069A - Method, system and device for realizing heterogeneous convergence of cellular network and wireless local area network

Info

Publication number: CN105636069A
Application number: CN201610099192.5A
Authority: CN
Inventors: 刘谦雷; 鲍东山
Original assignee: Beijing Nufront Mobile Multimedia Technology Co Ltd
Current assignee: Beijing Nufront Mobile Multimedia Technology Co Ltd
Priority date: 2011-09-07
Filing date: 2011-09-07
Publication date: 2016-06-01
Anticipated expiration: 2031-09-07
Also published as: CN105636069B

Abstract

The invention discloses a method for realizing heterogeneous convergence of a cellular network and a wireless local area network. The method comprises the following steps that: a terminal module of the cellular network and a terminal module of the wireless local area network are combined, such that an intermediate connection site is formed; the intermediate connection site is put in an overlaid coverage area of a cellular base station and the wireless local area network; the terminal module of the wireless local area network of the intermediate connection site is communicated with a network access point of the wireless local area network through connection of the wireless local area network; the terminal module of the cellular network of the intermediate connection site is communicated with a dual-mode terminal through connection of the cellular network; due to dual-connection of the intermediate connection site, the dual-mode terminal is communicated with the network access point of the wireless local area network; signalling related to management of a heterogeneous network is switched; and thus, heterogeneous convergence of the cellular network and the wireless local area network is realized. Heterogeneous convergence of two networks can be realized without changing a core network in a cellular communication system; and the advantages of being low in cost and rapid in period can be realized.

Description

Realize the mthods, systems and devices that Cellular Networks-WLAN Heterogeneous merges

The application is divisional application, and its female case is the applying date is JIUYUE in 2011 7, and application number is 201110264346.9, and denomination of invention be the patent application of " mthods, systems and devices realizing Cellular Networks-WLAN Heterogeneous fusion ".

Technical field

The present invention relates to wireless communication field, particularly relate to a kind of method, system and device realizing Cellular Networks-WLAN Heterogeneous fusion.

Background technology

In recent years, along with widely using of the portable set such as mobile phone, notebook computer, mobile Internet access is proposed increasing demand by people. 3G (WCDMA, CDMA2000, TD-SCDMA) system can provide the user certain communication flows for surfing the Net, but is difficult to the demand meeting cellphone subscriber for the high amount of traffic amount of online, it is also difficult to provides the user data service at a high speed. A community such as existing WCDMA system can only provide the data rate of 2Mbps, can not meet far away user's demand for Internet service. By adopting high speed downlink packet access technology (HSDPA, HighSpeedDownlinkPacketAccess), one WCDMA base station can provide the downstream data rate of 10Mbps for the user in community, but distance meets the communication flows of user's Internet service demand, and still there is a big difference.

Solving a not enough way of 3G system communication flows is adopt Cellular Networks and WLAN Heterogeneous Network Convergence Technology, gets up to use by two kinds of network integrations. Cellular Networks has the advantages that covering is big, data rate is relatively low, WLAN then has data rate height, cover the less feature data rate of 150Mbps (the 802.11n WLAN such as single antenna 40MHz bandwidth can provide a user with), getting up to use by both fusions, the high data rate that can make full use of WLAN shares communication flows for cellphone subscriber.

3GPP tissue has been proposed for the embodiment that a kind of Cellular Networks merges with WLAN Heterogeneous, its specific practice is to arrange a wired connection between the core net and the Network Access Point of WLAN of Cellular Networks, and in the core net of Cellular Networks, increase WLAN access gateway (WAG, WLANAccessGateway), the unit such as packet data gateway (PDG, PacketDataGateway) supports that the user data in WLAN is sent to the Internet by the core net of Cellular Networks. The particular content of the program is referred to the document of 3GPP: 3GPPTS23.234. The scheme of 3GPP requires over the core net to Cellular Networks and carries out device upgrade and could realize, will face equipment cost height, commercial performance period the shortcoming such as length.

The equipment of core net have to meet data capacity big, can the requirement such as long-term stable operation, its equipment cost is much more expensive. Cellular Networks core net adds new equipment, the equipment cost of cellular network operator will be significantly increased, it is also possible to the problem that whole cellular system job insecurity can be caused, increase the operations risks of operator. And, newly-increased equipment of the core network from beforehand research, to exploitation, on probation, will through a very long time cycle to formal commercialization, this time cycle several years possibly, this also means that the scheme changing core net is difficult to put it into commercial operation within the shorter time cycle, it is difficult to meet the user of the task of top priority and surf the Net demand.

Therefore, the isomery fusion realizing Cellular Networks and WLAN under the premise not changing Cellular Networks core net is the technical problem with great practical value that Cellular Networks-WLAN Heterogeneous merges that field to face.

Fig. 1 is the annexation schematic diagram of existing Cellular Networks and WLAN, and in Fig. 1, solid line represents wired connection, and dotted line represents wireless connections. WLAN and Cellular Networks are in the state of discrete application, and the Network Access Point 102 of WLAN is linked into the Internet 103, but does not occur directly to be connected with Cellular Networks. The flow of user can be added up by telecom operators by wireless lan network access point 102, and user is carried out charging by the charging center then reporting operator. In this connected mode, Cellular Networks-WLAN dual-mode terminal 101 both can be transmitted data by Cellular Networks, also data can be transmitted by WLAN, but it is when being entered into WLAN by Cellular Networks, can not will automatically forward the business datum that wireless local transfers on network is current to, when being entered into Cellular Networks by WLAN, can not automatically forward the business datum that honeycomb transfers on network is current to. By Cellular Networks and WLAN are carried out certain technology upgrading, it is also possible to the isomery realizing a degree of Cellular Networks and WLAN under the network architecture shown in Fig. 1 merges.

The problem that isomery integration program under Fig. 1 framework will exist two aspects. One is: the performance of its isomery switching can not be guaranteed, as: when dual-mode terminal is entered into Cellular Networks by WLAN, owing to wireless lan signal is likely to die down suddenly or disappear, dual-mode terminal will be made can not normally to realize isomery switching, it is impossible to meet user's demand for isomery fused business; Two are: such scheme is likely to be also required to the core net to Cellular Networks and carries out certain upgrading and change, although this technology upgrading need not increase equipment of the core network on a large scale as the scheme of 3GPP, but same Ye Huishi operator faces operations risks.

On the other hand, although existing cellular Netcom realizes all region covering to working region usually through cellular basestation, but all region covering of this mode can be significantly increased the cost of arranging net of Cellular Networks, in order to reduce cost of arranging net, it is possible to adopt cellular basestation to carry out the covering of coarseness, carry out mending the blind mode carrying out fine granularity covering with little base station again and realize the covering of Cellular Networks. As a kind of scheme, 3GPP proposes the in-door covering problem (concrete scheme is referred to: 3GPPTS25.467) solving Cellular Networks by the mode of HomeNodeB. In this scenario, cellular basestation is mainly used to realize outdoor cover, and in-door covering is realized by indoor base station (HomeNodeB). The shortcoming of this scheme is: than WLAN, arranges the cost intensive of HomeNodeB, not easily promotes; And indoor and outdoors base station all uses the frequency range of Cellular Networks, can there is the interference problem between two kinds of base stations, the performance of influential system. And merged by the isomery of Cellular Networks with WLAN, in-door covering is carried out with WLAN, match with the outdoor cover of cellular basestation, then can overcome the disadvantages mentioned above of 3GPP scheme, it is achieved Cellular Networks-WLAN Heterogeneous emerging system covering to working region.

Summary of the invention

In view of this, the technical problem to be solved is to provide and a kind of is also only making less or little change to Cellular Networks without modification or while making little change, to the Network Access Point of WLAN to realize the method that Cellular Networks-WLAN Heterogeneous merges. In order to some aspects of the embodiment disclosed are had a basic understanding, shown below is simple summary. This summarized section is not extensive overview, neither determine key/critical component or describe the protection domain of these embodiments. Its sole purpose is to present some concepts by simple form, in this, as the preamble of following detailed description.

The invention provides a kind of method realizing Cellular Networks-WLAN Heterogeneous fusion, including:

Connect website in the middle of Cellular Networks terminal module and WLAN terminal block combiner being constituted, and the described middle website that connects is placed in the coincidence overlay area of cellular basestation and WLAN;

Connect in the middle of described and communicated by the connection of WLAN between WLAN terminal module and the Network Access Point of WLAN of website, be connected by Cellular Networks between Cellular Networks terminal module and the dual-mode terminal of connection website in the middle of described and communicate;

By described middle above-mentioned two connections connecting website, the Network Access Point of described dual-mode terminal and described WLAN communicates, and exchanges the signaling relevant to heterogeneous network management, it is achieved Cellular Networks-WLAN Heterogeneous merges.

In some optional embodiments, the method that described Network Access Point connects the site switch signaling relevant with heterogeneous network management to described dual-mode terminal by centre, particularly as follows:

The middle website that connects is at the beginning of accessing WLAN, and in the middle of being one by it, connection website this point and its communication identifier information in Cellular Networks tell the Network Access Point of WLAN;

Network Access Point, after obtaining middle connection website communication identifier information in Cellular Networks, sends this communication identifier information by the mode of broadcast or clean culture to the wireless LAN station in its overlay area in a wireless local area network;

Dual-mode terminal obtains the middle connection website communication identifier information in Cellular Networks when finding WLAN;

Dual-mode terminal realizes being connected the communication of website with centre by this communication identifier information in Cellular Networks;

The Network Access Point being connected website, dual-mode terminal and WLAN by centre is communicated, and exchanges the signaling relevant to heterogeneous network management.

In some optional embodiments, described communication identifier information, particularly as follows:

Described Cellular Networks terminal module address in existing cellular net, label, name information, other Cellular Networks terminal in this Cellular Networks can find this Cellular Networks terminal module by this communication identifier information and communicate.

In some optional embodiments, described communication identifier information is the IP address that the telephone number of described Cellular Networks terminal module or international mobile subscriber identity IMSI or Cellular Networks distribute to described Cellular Networks terminal module; Or

When cellular system is UMTS UMTS, described communication identifier information is the Temporary Mobile Subscriber Identity TMSI or the mobile platform temporary identifier P-TMSI or UMTS grounding wireless access network network UTRAN Radio Network Temporary Identifier U-RNTI or Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI of packet of described Cellular Networks terminal module.

In some optional embodiments, described Network Access Point, by connecting the communication identifier information of website in the middle of wireless local area networks broadcast, realizes especially by the following manner:

Realize by sending broadcast frame in MAC layer or Internet, or realize by sending the broadcast channel of mac frame in MAC layer.

In some optional embodiments, in 802.11 systems, described at MAC layer transmission broadcast frame, particularly as follows:

The beacon frame of 802.11 systems adds the new data item representing the middle communication identifier information connecting website and forms new beacon frame.

In some optional embodiments, described Network Access Point, by connecting the communication identifier information of website in the middle of WLAN clean culture, realizes especially by the following manner:

New unicast frame is formed by adding the data item representing the middle communication identifier information connecting website or data field in original unicast frame, or, new definition comprises the new unicast frame of described communication identifier information;

And send described new unicast frame in MAC layer.

In some optional embodiments, the signaling that between dual-mode terminal to the middle Cellular Networks terminal module connecting website, transmission is relevant with heterogeneous network management, specifically include following two mode:

Dual-mode terminal directly sends the signaling relevant to heterogeneous network management to the other side with the middle Cellular Networks terminal module connecting website by the mode of Cellular Networks signaling; And/or

The signaling relevant to heterogeneous network management is encapsulated in packet and is transmitted as the data payload of Cellular Networks.

In some optional embodiments, the signaling that between the Network Access Point of WLAN to the middle WLAN terminal module connecting website, transmission is relevant with heterogeneous network management, specifically include following three kinds of modes:

Agreement Network Access Point is only used for transmitting the signaling relevant with heterogeneous network management to the data transmission of the middle MAC layer connected between website, and receiving terminal is when receiving MAC layer data, and these data of extracting directly are as the signaling relevant to heterogeneous network management; Or

Indicating the load of current MAC frame by the agreement in mac frame is the signaling relevant to heterogeneous network management; Or

Indicating the load of current data frame by the agreement in the Frame of Internet or transport layer or application layer is the signaling relevant to heterogeneous network management.

In some optional embodiments, what the agreement in mac frame identified realizes method, particularly as follows:

By WLAN defining the mac frame of new type or the new subtype of mac frame definition of defined type being realized, the subtype mark of the frame type mark of the mac frame of this new type or the mac frame of new subtype is the agreement mark in described mac frame.

In some optional embodiments, what the agreement in network layer data frame identified realizes method, particularly as follows:

By defining the Frame of a kind of new type in Internet or the new subtype of Frame definition of defined type being realized, the subtype mark of the frame type mark of the Frame of this new type or the Frame of new subtype is the agreement mark in described network layer data frame.

In some optional embodiments, access WLAN when dual-mode terminal is entered into WLAN overlay area by cellular network coverage and carry out the flow process of isomery switching, specifically including:

Dual-mode terminal enters WLAN overlay area, it has been found that wireless lan network access point, and now dual-mode terminal finds that the signal of its Cellular Networks is still stronger; Dual-mode terminal extracts middle connection website communication identifier information in Cellular Networks from the broadcast frame of Network Access Point;

Dual-mode terminal is connected website by Cellular Networks to this centre by described communication identifier information initiates and sets up connection, and the request that is then sent to accesses the signaling of WLAN, comprises the MAC Address of dual-mode terminal WLAN network interface card in this signaling; Centre connects the website connection again through WLAN and this signaling is transmitted to the Network Access Point of WLAN;

Actively sent the signaling agreeing to its access by Network Access Point to above-mentioned MAC Address, or sent access request, Network Access Point verification MAC Address to Network Access Point in a wireless local area network by dual-mode terminal, it is achieved the access of dual-mode terminal;

If current business to be carried out isomery switching by dual-mode terminal, then perform the flow process of isomery switching further by the upper-layer protocol of predetermined support isomery switching.

Dual-mode terminal enters WLAN overlay area, it has been found that wireless lan network access point, and now dual-mode terminal finds signal weaker or the disappearance of Cellular Networks;

Dual-mode terminal directly initiates to access the request of current wireless Local Area Network to Network Access Point by WLAN, hereafter exchanges certification and authorization signaling between Cellular Networks core net, Network Access Point, dual-mode terminal, it is achieved dual-mode terminal accesses WLAN;

The information of its signal(l)ing condition information in Cellular Networks He its wireless lan network access point accessed is sent to Cellular Networks by wireless lan network access point and the middle website that connects by dual-mode terminal;

Cellular Networks determines the connection status of it and dual-mode terminal according to its signal(l)ing condition information in Cellular Networks that dual-mode terminal provides, and this information is connected website and wireless lan network access point is sent to dual-mode terminal by Cellular Networks or by middle, after receiving this information, dual-mode terminal arranges the connection status of it and Cellular Networks;

In some optional embodiments, WLAN withdraw and the flow process carrying out isomery switching when dual-mode terminal is entered into cellular network coverage by WLAN overlay area, specifically include:

Dual-mode terminal is connected by Cellular Networks and connects website transmission WLAN withdraw to centre or carry out the signaling of isomery switching, and the middle website that connects connects the Network Access Point that this signaling is transmitted to WLAN again through WLAN;

If current business to be carried out isomery switching by dual-mode terminal, then perform the flow process of isomery switching by the upper-layer protocol of predetermined support isomery switching, otherwise, do not perform this operation;

Network Access Point terminates the access to WLAN of this dual-mode terminal.

In some optional embodiments, dual-mode terminal carries out the flow process of isomery switching when being entered into cellular network coverage by WLAN overlay area, specifically include:

Use the Cellular Networks that the WLAN between Network Access Point and the middle WLAN terminal module connecting website connects between middle Cellular Networks terminal module and the dual-mode terminal connecting website to be connected, the Network Access Point of WLAN send the business currently transmitted to dual-mode terminal;

After dual-mode terminal enters cellular network coverage, the new business opened is transmitted by Cellular Networks.

Present invention also offers the system that a kind of Cellular Networks-WLAN Heterogeneous merges, including: dual-mode terminal, WLAN Network Access Point, middle connect website, cellular basestation, the part of cellular communication system more top and the Internet;

The Network Access Point of described dual-mode terminal and described WLAN is wireless connections, and described dual-mode terminal and described cellular basestation are wireless connections, and described cellular basestation is connected upwardly to the part of described cellular communication system more top;

Connect website in the middle of described and include WLAN terminal module and Cellular Networks terminal module;

Communicated by the connection of WLAN between described WLAN terminal module and the Network Access Point of described WLAN, be connected by Cellular Networks between described Cellular Networks terminal module and dual-mode terminal and communicate;

Present invention also offers and in the middle of one, connect website, including:

WLAN terminal module, is used for and is communicated by the connection of WLAN between the Network Access Point of WLAN;

Cellular Networks terminal module, for communicating with being connected by Cellular Networks between dual-mode terminal;

It is connected with above-mentioned two of WLAN and Cellular Networks by described WLAN terminal module and described Cellular Networks terminal module, the Network Access Point of described dual-mode terminal and described WLAN communicates, exchange the signaling relevant to heterogeneous network management, it is achieved Cellular Networks-WLAN Heterogeneous merges.

Adopt mthods, systems and devices proposed by the invention, will be carried out following functions and effect:

1, achieve dual-mode terminal can automatically be switched on WLAN by current service data to be transmitted when being entered WLAN by Cellular Networks, and can automatically current service data is switched in Cellular Networks when being entered Cellular Networks by WLAN and be transmitted. Being merged by this isomery, WLAN will can share the communication flows of substantial amounts of user data for Cellular Networks, such that it is able to meet user's demand for getting online without being tethered to a cable.

2, when dual-mode terminal occurs by WLAN to the switching of Cellular Networks, the signaling of its isomery switching can issue the Network Access Point of WLAN, thereby may be ensured that what isomery switched completes.

3, when dual-mode terminal is accessed WLAN by Cellular Networks or is occurred by Cellular Networks to the switching of WLAN, dual-mode terminal need not be done once certification again by heterogeneous system by Network Access Point, improve the safety of system work, also save the time of certification, it is possible to reduce the time delay of isomery switching.

4, during dual-mode terminal WLAN withdraw, it exits signaling can issue the Network Access Point of WLAN, is conducive to the Network Access Point management to WLAN.

5, by adopting the method for embodiment two in the specific embodiment of the invention, when Cellular Networks working region can not be realized all region covering maybe can not realize better covering to working region, can also carry out mending with WLAN blind to Cellular Networks, improve the overlay area of Cellular Networks, particularly can solve the in-door covering problem of Cellular Networks.

Accompanying drawing explanation

Fig. 1 is the annexation schematic diagram of existing Cellular Networks and WLAN;

Fig. 2 is a kind of structural representation realizing Cellular Networks-WLAN Heterogeneous emerging system that the embodiment of the present invention one provides;

Fig. 3 is the structural representation of the Cellular Networks-WLAN Heterogeneous emerging system when Network Access Point and Cellular Networks terminal module belong to same cellular basestation that the embodiment of the present invention one provides;

Fig. 4 is the structural representation of the Cellular Networks when Network Access Point and Cellular Networks terminal module belong to different cellular basestation that provides of the embodiment of the present invention one and WLAN Heterogeneous emerging system;

Fig. 5 is the method schematic diagram that the Network Access Point that the embodiment of the present invention one provides sends the signaling relevant to heterogeneous network management by its Cellular Networks terminal module to dual-mode terminal;

Fig. 6 is that the dual-mode terminal that the embodiment of the present invention one provides connects the method schematic diagram sending the signaling relevant to heterogeneous network management to Network Access Point by Cellular Networks.

Fig. 7 is the structural representation that the another kind that the embodiment of the present invention two provides realizes Cellular Networks-WLAN Heterogeneous emerging system;

Fig. 8 is the structural representation of the Cellular Networks-WLAN Heterogeneous emerging system when Network Access Point and Cellular Networks terminal module belong to same cellular basestation that the embodiment of the present invention two provides;

Fig. 9 is the structural representation of the Cellular Networks when Network Access Point and Cellular Networks terminal module belong to different cellular basestation that provides of the embodiment of the present invention two and WLAN Heterogeneous emerging system;

Figure 10 is the method schematic diagram that the Network Access Point that the embodiment of the present invention two provides sends the signaling relevant to heterogeneous network management by the Cellular Networks terminal module of centre connection website to dual-mode terminal;

Figure 11 is that the dual-mode terminal that the embodiment of the present invention two provides connects the method schematic diagram sending the signaling relevant to heterogeneous network management to Network Access Point by Cellular Networks.

Detailed description of the invention

The following description and drawings illustrate specific embodiments of the present invention fully, to enable those skilled in the art to put into practice them. Other embodiments can include structure, logic, electric, process and other change. Embodiment only represents possible change. Unless explicitly requested, otherwise independent assembly and function are optional, and the order operated can change. The part of some embodiments and feature can be included in or replace part and the feature of other embodiments. The scope of embodiment of the present invention includes the gamut of claims and all obtainable equivalent of claims. In this article, these embodiments of the present invention can be represented individually or generally with term " invention ", this is only used to conveniently, and if in fact disclose the invention of more than one, what be not meant to automatically to limit this application ranges for any single invention or inventive concept.

Below in conjunction with accompanying drawing, embodiments of the present invention are described in detail.

Some explanations of nouns that the present invention relates to are as follows:

The Network Access Point of WLAN: WLAN accesses the access point of external network (such as the Internet), the user site in WLAN is communicated by the website beyond this access point and WLAN. In 802.11 and HiperLAN/2 WLAN, this Network Access Point is called access point (AP, AccessPoint). In the present invention referred to as Network Access Point.

The structure of WLAN: WLAN is made up of a Network Access Point and one group of user site, this Network Access Point generally again can as the center base station of WLAN, user site works under its coverage, and accesses WLAN by being associated with. The currently used WLAN overwhelming majority have employed such network structure. WLAN can also not have center base station, namely WLAN such as a kind of Mesh of being called structure of 802.11s protocol definition is such example, and the user site in LAN can by being relaying with other website, use the mode of multi-hop to be connected to the website in LAN and Network Access Point. In the present invention, we only require that WLAN comprises Network Access Point, WLAN is not defined as the WLAN being to use center base station, but the WLAN with center base station is its typical case's application.

The level of cellular communication system: cellular communication system is made up of core net, Access Network and user terminal three layers. Cellular basestation belongs to this layer of Access Network. Two sublayers of unit that the Access Network of existing 2G and 3G system is controlled cellular basestation by cellular basestation and management are constituted. In following cellular communication system, Access Network is likely to and is only made up of cellular basestation.

Heterogeneous wireless network: two or more is adopted different technology, is merged the network of use especially with the wireless network of different physical-layer techniques by integration technology, is called heterogeneous wireless network, referred to as heterogeneous network in the present invention.

Isomery switches: the dual-mode terminal of two or more different wireless network accessible or multimode terminal, the switching occurred between two kinds of wireless networks is called that isomery switches. Through switching, the current business of terminal will continue in a new network transmission, without being terminated.

Cellular Networks-WLAN dual-mode terminal: simultaneously comprise cellular network user terminal and the terminal of wireless local network user website, this terminal can communicate with Cellular Networks and WLAN simultaneously. If comprising the cellular network user terminal of more than at least two in terminal or/and the wireless local network user website that comprises more than at least two, then such multimode terminal falls within Cellular Networks-WLAN dual-mode terminal. Referred to as dual-mode terminal in the present invention.

Communication connection: by communication path wired, that wirelessly or non-wirelessly wireless hybrid mode is formed between two communication entities. In the present invention referred to as connection.

The present invention proposes two kinds and realizes the method that Cellular Networks-WLAN Heterogeneous merges, and is described in detail for embodiment one and embodiment two separately below.

Embodiment one

The embodiment of the present invention one proposes a kind of method realizing Cellular Networks-WLAN Heterogeneous fusion, its concrete methods of realizing is: embed a Cellular Networks terminal module in the Network Access Point of former WLAN, constitute the Network Access Point of new WLAN, here, the Network Access Point of former WLAN includes the Network Access Point in the WLAN now having pointed out, such as the access point of the access point of 802.11 WLANs and HiperLAN/2 WLAN, also include the Network Access Point in the WLAN being likely to occur future simultaneously; Being arranged in the overlay area of certain cellular basestation by this Network Access Point again, the Cellular Networks terminal module of Network Access Point works in the way of a common Cellular Networks terminal; It is connected by Cellular Networks between dual-mode terminal with the described Cellular Networks terminal module embedded in Network Access Point and communicates, exchange the signaling relevant to heterogeneous network management, it is achieved Cellular Networks-WLAN Heterogeneous merges.

Realize in method provided by the invention, the Network Access Point requiring WLAN is placed in the overlay area of certain cellular basestation, consider Cellular Networks most area, particularly user concentrate area (in such kind of area, user is also high to the requirement of data traffic) region-wide covering can be realized, this requirement is easy to reach in practice. If Network Access Point is simultaneously in the overlay area of plural cellular basestation, its Cellular Networks terminal module adopts Cellular Networks terminal to select one of them cellular basestation of method choice of base station as its access base station.

In typical application scenarios, working region can be realized region-wide covering by Cellular Networks, WLAN is then to the subregional covering of working region achievement unit, but the method for the present invention stands good and working region can not realize in Cellular Networks the situation of all region covering.

In typical application, the communication connection between Cellular Networks terminal module and the cellular basestation of Network Access Point is only used for transmitting the signaling relevant with heterogeneous network management, and does not transmit user data, thus, only take up bandwidth only small in cellular system. But the present invention is not precluded from being connected, by the Cellular Networks between Network Access Point with cellular basestation, the situation transmitting data.

Dual-mode terminal can be connected by the Cellular Networks between itself and the Cellular Networks terminal module embedded by Network Access Point asks to access WLAN. its implementation is: Network Access Point sends the communication identifier information of its embedded Cellular Networks terminal module in a wireless local area network by the mode of broadcast (usually periodically broadcast) or clean culture to the wireless LAN station in its overlay area, here communication identifier information refers to Cellular Networks terminal module address in existing cellular net, label, the information such as title, other Cellular Networks terminal in this Cellular Networks can find this Cellular Networks terminal module by this communication identifier information and communicate, this communication identifier information is such as: Cellular Networks distributes to the IP address of the Cellular Networks terminal module of this embedding, the telephone number of this Cellular Networks terminal module, international mobile subscriber identification number (IMSI, InternationalMobileSubscriberIdentity) etc., if described cellular system is UMTS (UMTS, UniversalMobileTelecommunicationsSystem), then the example of this communication identifier information also includes: Temporary Mobile Subscriber Identity number (TMSI, TemporaryMobileSubscriberIdentity), the mobile platform temporary identifier (P-TMSI of packet, PacketTemporaryMobileSubscriberIdentity), UMTS grounding wireless access network network (UTRAN, UMTSTerrestrialRadioAccessNetwork) Radio Network Temporary Identifier number (U-RNTI, UTRANRadioNetworkTemporaryIdentity), Cell Radio Network Temporary Identifier/Identity, Cell-RNTI number (C-RNTI, CellRadioNetworkTemporaryIdentity) etc., by such communication identifier information, other Cellular Networks terminal can communicate with described Cellular Networks terminal module in Cellular Networks, when dual-mode terminal enters current wireless Local Area Network, the communication identifier information of the Cellular Networks terminal module that Network Access Point embeds can be obtained by above-mentioned broadcast or unicast info, and use this communication identifier information to initiate the communication with Cellular Networks terminal module, for exchanging the signaling relevant to heterogeneous network management. in some examples of above-mentioned communication identifier information, if described communication identifier information is the network address (being generally IP address) of described Cellular Networks terminal module, then dual-mode terminal can pass through to transmit the signaling relevant to heterogeneous network management to the mode of this network address transmission packet (being generally IP packet), if above-mentioned communication identifier information is telephone number or the IMSI of described Cellular Networks terminal module, dual-mode terminal then can by initiating calling to this telephone number or IMSI, the mode that then sets up connection transmit the signaling relevant to heterogeneous network management.

Network Access Point is by the communication identifier information of wireless local area networks broadcast or the Cellular Networks terminal module of its embedding of clean culture, so that the user site in WLAN can obtain this information.

Network Access Point can, in the communication identifier information of MAC layer or the Cellular Networks terminal module of Internet or other layer broadcast (usually periodically broadcast) its embedding, be used for supporting that its Cellular Networks terminal module is initiated to connect by dual-mode terminal. This can be realized by transmission in MAC layer or Internet or other layer (usually periodically sending) broadcast frame, these broadcast frames can be the broadcast frame of new definition, the new broadcast frame that can also be the data item of the communication identifier information adding the Cellular Networks terminal module representing embedded in original broadcast frame of equivalent layer or data field and formed, as: for 802.11 WLANs, it is possible to by adding above-mentioned data item in its MAC layer beacon frame or data field obtains new beacon frame; This can also be realized by the broadcast channel of transmission in the mac layer (usually periodically sending) mac frame, this broadcast channel can be the broadcast channel of new definition in mac frame, it can also be the new broadcast channel adding the data item of the new communication identifier information representing embedded Cellular Networks terminal module or data field in original broadcast channel and being formed, as: for HiperLAN/2 WLAN, it is possible to obtain new MAC layer broadcast channel by adding above-mentioned data item or data field in its mac frame broadcast channel.

Network Access Point can also be sent to the communication identifier information of the Cellular Networks terminal module of its embedding in MAC layer by the mode of the website transmission unicast frame under covering to it. These unicast frames can be the unicast frame of new definition, the new unicast frame that can also be the data item of the communication identifier information adding the Cellular Networks terminal module representing embedded in original unicast frame or data field and formed, as: for 802.11 WLANs, it is possible to response frame adds above-mentioned data item or data field obtains new inquiring after response frame by inquiring after in its MAC layer.

A kind of method of one according to embodiments of the present invention, it is possible to obtain Cellular Networks-WLAN Heterogeneous emerging system.

Fig. 2 is the structural representation of Cellular Networks-WLAN Heterogeneous emerging system that the present invention proposes. In Fig. 2, number line represents wired connection, and straight dashed line represents wireless connections. System includes the part 205 of dual-mode terminal 201, the Network Access Point 202 of WLAN, the Internet 203, cellular basestation 1 and cellular basestation 2 2042 and cellular communication system more top. Wherein, the part 205 of cellular communication system more top is cellular basestation above part and do not comprise cellular basestation in cellular communication system, comprises the core net of Cellular Networks wherein. The Network Access Point 202 of WLAN includes former network insertion point module 2021 and Cellular Networks terminal module 2022, and Cellular Networks terminal module 2022 connects for setting up a cellular network communication between the Network Access Point and Cellular Networks of described WLAN. Cellular Networks terminal module 2022 is connected to cellular basestation 1, dual-mode terminal is connected to cellular basestation 2 2042, that is: cellular basestation 1 is the affiliated cellular basestation of Cellular Networks terminal module 2022, and cellular basestation 2 2042 is the cellular basestation belonging to dual-mode terminal 201. In Fig. 2, it is different base station that the broken box of cellular basestation 2 2042 represents that this base station is likely to from cellular basestation 1, it is also possible to be same base station with cellular basestation 1; Whether cellular basestation 1 and cellular basestation 2 2042 are that same cellular basestation depends on whether the Cellular Networks terminal module 2022 of Network Access Point and dual-mode terminal 201 have selected same base station. Owing to same cellular basestation can be can select that with factor, the Cellular Networks terminal module of Network Access Point and the dual-mode terminal such as distribution of the relative position relation of cellular basestation, the signal intensity of cellular basestation, it is also possible to select different cellular basestations.

It is connected by Cellular Networks between dual-mode terminal 201 with the Cellular Networks terminal module 2022 embedded in Network Access Point 202 and communicates, exchange the signaling relevant to heterogeneous network management, it is achieved isomery merges.

For the Cellular Networks shown in Fig. 2 and WLAN Heterogeneous emerging system, it is whether the difference of the situations such as same base station according to wherein cellular basestation 1 and cellular basestation 2 2042, it is possible to obtain the concrete structure of Cellular Networks-WLAN Heterogeneous emerging system proposed by the invention as shown in Figure 3, Figure 4. Wherein, Fig. 3 is cellular basestation one and cellular basestation two is isomery emerging system during same cellular basestation (i.e. cellular basestation 304), and Fig. 4 is cellular basestation one and cellular basestation two is isomery emerging system during different cellular basestation.

In isomery emerging system shown in Fig. 2 to Fig. 4, the Network Access Point of WLAN is made up of former network insertion point module and Cellular Networks terminal module two parts, it realizes by embedding a Cellular Networks terminal module in the Network Access Point of former WLAN, and this can be completed by concrete Design of Digital Circuit technology.

Conventional method is: owing to former Network Access Point usually realizes with one piece of circuit board, therefore new Network Access Point can be realized by increase Cellular Networks terminal module on the circuit board of former Network Access Point, be connected by the circuit on circuit board between newly-increased Cellular Networks terminal module and original device, such that it is able to original device transmission data. Realize the data transmission between digital circuit blocks by the design of digital circuit and connection and belong to the existing and ripe technology in digital circuit field.

Another kind of optional method is: Cellular Networks terminal module is individually packaged into an entity, as being individually encapsulated on one piece of circuit board, and a communication interface is set wherein, increase on the circuit board of former Network Access Point simultaneously a communication interface or utilize independent (as, original individually encapsulation) original communication interface on former Network Access Point, this communication interface is same type with the communication interface in Cellular Networks terminal module, by the connection of communication interface, it is possible to transmit data between. Thus, former Network Access Point, the Cellular Networks terminal module individually encapsulated and communication connection between the two, namely constitute new Network Access Point. In this implementation, the example of described communication interface is such as USB interface, RS-232 interface, Ethernet interface etc., and transmits data by the connection of communication interface and be also belonging to the existing and ripe technology in digital circuit field.

In the method as proposed in the present invention, the Network Access Point of former WLAN embeds Cellular Networks terminal module constitute the realization of new Network Access Point and comprise and following realize method: if already provided with the interface of correspondence with foreign country in independent former Network Access Point, such as USB interface, Ethernet interface etc., then identical communication interface can be set at Cellular Networks terminal module, by independent former Network Access Point, the Cellular Networks terminal module individually encapsulated and communication connection between the two, constitute new Network Access Point. Realize in method this, the Cellular Networks terminal module embedded is usually located at outside the box body of independent former Network Access Point, and " embedding " here then refers to that Cellular Networks terminal module is communicated to connect with it by communication interface original in former Network Access Point.

When former network insertion point module is attached by communication interface with Cellular Networks terminal module, external communications units mails to the information of Cellular Networks terminal module can be sent to former network insertion point module by this communication interface, and external communications units mails to the information of former network insertion point module can also be sent to Cellular Networks terminal module by this communication interface.

The transmission of the signaling relevant with heterogeneous network management between dual-mode terminal and the Cellular Networks terminal module embedded by Network Access Point can be realized by following two mode:

First kind of way is the Cellular Networks signaling relevant to heterogeneous network management that the design of the Access Network to Cellular Networks is new, and the Cellular Networks terminal module of dual-mode terminal and Network Access Point directly can send this signaling to the other side in Cellular Networks. This kind of mode needs the Access Network to Cellular Networks to carry out only small change.

Another way is to be encapsulated in packet by the signaling relevant to heterogeneous network management, become the load of Cellular Networks Frame to be transmitted this data packet encapsulation again, is about to the signaling relevant to heterogeneous network management and is encapsulated in packet to be transmitted as the data payload of Cellular Networks. Here packet, is generally IP packet, it is also possible to be other type of packet. In this signalling mode, before starting to transmit signaling, needing to be initiated and set up in Cellular Networks the connection of a transmission packet by the side (dual-mode terminal or the Cellular Networks terminal module embedded by Network Access Point) communicated, both sides' (dual-mode terminal and Cellular Networks terminal module embedded by Network Access Point) connect exchange of signaling by this thereafter. The Access Network of Cellular Networks need not be modified by this kind of mode.

Dual-mode terminal transmits the signaling relevant with heterogeneous network management to the Cellular Networks terminal module embedded by Network Access Point by Cellular Networks, comprising the link of dual-mode terminal and the communication unit in corresponding Cellular Networks and the Cellular Networks terminal module embedded by Network Access Point and the communication unit exchange of signaling in corresponding Cellular Networks, the two link is possible with different modes and transmits the signaling relevant to heterogeneous network management.

In communication between the Cellular Networks terminal module that dual-mode terminal and Network Access Point embed, by the communication identifier information of its embedded Cellular Networks terminal module that the broadcast of aforementioned network access point or mode of unicast send, dual-mode terminal is by can by directly transmitting Cellular Networks signaling method or/and to send the signaling relevant to heterogeneous network management to Network Access Point by the mode that signaling encapsulation sends in a packet.

By using the signaling relevant to the heterogeneous network management load as packet and and then the method that realizes that is transmitted as the load of block domain data frame as shown in Figure 5 and Figure 6, wherein, Fig. 5 is that Network Access Point passes through its Cellular Networks terminal module and sends the situation of the signaling relevant to heterogeneous network management to dual-mode terminal, and Fig. 6 is that dual-mode terminal passes through the Cellular Networks connection situation to the Network Access Point transmission signaling relevant to heterogeneous network management. In Figure 5, first the signaling relevant to heterogeneous network management be encapsulated in packet by the Cellular Networks terminal module of Network Access Point, the load that this data packet encapsulation becomes the Frame of Cellular Networks packet domain again is transmitted, dual-mode terminal decapsulates after receiving this Cellular Networks Frame, obtains packet and signaling successively. In figure 6, first the signaling relevant to heterogeneous network management be encapsulated in packet by dual-mode terminal, the load that this data packet encapsulation becomes the Frame of Cellular Networks packet domain again is transmitted, the Cellular Networks terminal module of Network Access Point decapsulates after receiving this Cellular Networks Frame, obtains packet and signaling successively.

In the application of some occasion, may there is the situation of the signaling relevant with heterogeneous network management to Cellular Networks exchange of the Cellular Networks terminal module embedded by dual-mode terminal or Network Access Point, this exchanges the signaling relevant with heterogeneous network management by the Cellular Networks terminal module embedded by dual-mode terminal or Network Access Point with the communication unit in corresponding Cellular Networks and realizes. communication unit in the corresponding Cellular Networks of this and embedded by dual-mode terminal or Network Access Point Cellular Networks terminal module is likely located in the part of cellular basestation or cellular communication system more top. adopt to the signaling relevant with heterogeneous network management between the Cellular Networks terminal module embedded by dual-mode terminal and network access point transmit similar method, the transmission of the signaling relevant with heterogeneous network management between dual-mode terminal with the communication unit in corresponding Cellular Networks, or the transmission of the Cellular Networks terminal module embedded by Network Access Point and the signaling being correlated with heterogeneous network management between the communication unit in corresponding Cellular Networks, also by aforesaid two ways, namely directly transmit Cellular Networks signaling method or signaling be encapsulated in the mode of transmission in packet and realize.

In isomery emerging system shown in Fig. 2 to Fig. 4, dual-mode terminal judges to select WLAN transmit data or select Cellular Networks to transmit data according to predetermined criterion. Dual-mode terminal includes judgement unit and network selection unit. Wherein, it determines unit, for judging to select WLAN transmit data or select Cellular Networks to transmit data according to predetermined criterion; Network selection unit, for carrying out the operation of corresponding network selection according to the result of described judgement unit.

It is exemplified below Cellular Networks and WLAN are carried out the criterion of evaluation, including signal strength criterion, WLAN prioritization criteria, service quality (QoS, QualityofService) signal strength criterion under premise can be met, WLAN prioritization criteria etc. that QoS can meet under premise. Specific embodiments of the invention are not limited to these criterions, other criterion selection WLAN can be adopted still to transmit data by Cellular Networks.

So-called signal intensity criterion, particularly as follows: when there is WLAN and Cellular Networks is available simultaneously, dual-mode terminal selects the transmitted data on network that signal intensity is stronger, so can so that user obtains the highest data throughput.

The so-called preferential criterion of WLAN, particularly as follows: when there is WLAN and Cellular Networks is available simultaneously, dual-mode terminal always selects WLAN, so can save, for Cellular Networks, the bandwidth that transmit data as much as possible.

For voice, the real time business such as video, except data throughput, also has the requirement of QoS, QoS can meet the signal strength criterion under premise, it is exactly when WLAN and Cellular Networks all can be used that QoS can meet the WLAN prioritization criteria under premise, primarily look at whether network of relation can meet the requirement of current business QoS, if only one of which network can meet this qos requirement, then select this network, if two networks can meet this qos requirement, then in two networks, select a network according still further to aforesaid signal strength criterion or WLAN prioritization criteria.

For the Cellular Networks shown in Fig. 2-WLAN Heterogeneous emerging system, access when dual-mode terminal is entered the WLAN area of coverage and the area of coverage single by WLAN area of coverage entrance Cellular Networks by the single area of coverage of Cellular Networks when Cellular Networks realizes all region covering to working region, WLAN withdraw are described below and carry out the flow process of isomery switching.

First, investigate and access WLAN when dual-mode terminal is entered into WLAN overlay area by single cellular network coverage and carry out the flow process of isomery switching. Idiographic flow is as follows:

If dual-mode terminal transmits currently without data, though or have data to transmit, the criterion selected according to network still selects Cellular Networks without carrying out business switching, then and it is when entering into WLAN overlay area, can accessing WLAN, the flow process of its access is as follows:

Step S701, dual-mode terminal enter WLAN overlay area, and obtain the communication identifier information of its embedded Cellular Networks terminal module from the broadcast frame of Network Access Point.

Step S702, dual-mode terminal initiate to connect to the Cellular Networks terminal module that Network Access Point embeds by above-mentioned communication identifier information, and and then set up connect, then it is sent to the signaling that request accesses, this signaling comprises the MAC Address of dual-mode terminal WLAN network interface card.

Step S703, must being have already been through certification and the mandate of Cellular Networks owing to using the terminal that communicates of cellular system, therefore dual-mode terminal 201 can not be authenticated and directly be considered as it and have passed through certification by Network Access Point 202.

Requirement according to operator is different, and Network Access Point 202 is likely to the part 205 also needed to cellular communication system more top and examines whether this dual-mode terminal 201 has opened the service of WLAN, and it then could be allowed to access WLAN. In this case, Network Access Point 202 sends signaling to core net, and whether inquiry dual-mode terminal 201 has opened the business of WLAN. If showing that existing cellular network termination module user has opened WLAN service from the information of core net feedback, then Network Access Point 202 accesses WLAN by accepting this dual-mode terminal 201. If operator arranges all of Cellular Networks terminal use and all has the authority using WLAN, then Network Access Point 202 avoids the need for carrying out this and examines and allow dual-mode terminal 201 to use WLAN transmission data.

If WLAN current for step S704 adopts coded communication, then Network Access Point 202 connects the signaling feeding back an agreement access to dual-mode terminal 201 by Cellular Networks, wherein comprises the key that WLAN is currently used. After dual-mode terminal 201 receives this signaling and key therein, in the way of encryption, send access request to Network Access Point 202 in a wireless local area network, after Network Access Point verification MAC Address, accept it and access.

If current WLAN does not adopt coded communication, one of following two mode then can be used to realize the access to dual-mode terminal: (1) Network Access Point 202 sends the signaling agreeing to its access on one's own initiative at WLAN to double; two terminals 201, this signaling comprises the MAC Address of dual-mode terminal WLAN network interface card, dual-mode terminal 201 makes response, accepts access; (2) Network Access Point 202 connects the signaling sending an agreement access to dual-mode terminal 201 by Cellular Networks, after dual-mode terminal 201 receives this signaling, access request is sent in a wireless local area network, Network Access Point verification MAC Address, it is achieved access to Network Access Point 202.

If currently transmitting data, and according to the criterion that network selects, will selecting WLAN, then need to carry out isomery switching, the flow process of this isomery switching is as follows:

Step S801, dual-mode terminal 201 enter WLAN overlay area, and obtain the communication identifier information of its embedded Cellular Networks terminal module from the broadcast frame of this Network Access Point.

Step S802, dual-mode terminal 201 initiate to connect to the Cellular Networks terminal module that Network Access Point embeds by above-mentioned communication identifier information, and and then set up connect, then it is sent to the signaling that request accesses, this signaling comprises the MAC Address of dual-mode terminal WLAN network interface card.

Dual-mode terminal 201 is not authenticated and is directly considered as it and has passed through certification by step S803, Network Access Point 202, and adopts the step identical with step S703 to decide whether to agree to that dual-mode terminal 201 uses WLAN transmission data further.

If WLAN current for step S804 adopts coded communication, then Network Access Point 202 connects the signaling feeding back an agreement access to dual-mode terminal 201 by Cellular Networks, wherein comprises the key that WLAN is currently used. After dual-mode terminal 201 receives this signaling and key therein, in the way of encryption, send access request to Network Access Point 202 in a wireless local area network, after Network Access Point 202 checks MAC Address, accept it and access.

If current WLAN does not adopt coded communication, one of following two mode then can be used to realize the access to dual-mode terminal: (1) Network Access Point sends the signaling agreeing to its access on one's own initiative at WLAN to dual-mode terminal, this signaling comprises the MAC Address of dual-mode terminal WLAN network interface card, dual-mode terminal makes response, accepts access; (2) Network Access Point connects the signaling sending an agreement access to dual-mode terminal by Cellular Networks, after dual-mode terminal receives this signaling, access request is sent in a wireless local area network, Network Access Point verification MAC Address, it is achieved access to Network Access Point.

Step S805, by dual-mode terminal, Network Access Point, Cellular Networks core net respective gateway between adopt the upper-layer protocol (such as: mobile IP protocol, movement SCTP (StreamControlTransportProtocol) agreement etc.) that predetermined support isomery switch, transferred to by the Internet by the respective gateway in Cellular Networks core net from the current service data of remote site and the Network Access Point of WLAN is transmitted further to dual-mode terminal, complete isomery switching.

Then, investigate WLAN withdraw and the flow process carrying out isomery switching when dual-mode terminal is entered into single cellular network coverage by WLAN overlay area, specific as follows:

If dual-mode terminal transmits currently without data, then performing the flow process of WLAN withdraw, idiographic flow is as follows:

Step S901, dual-mode terminal 201 find signal weaker or the disappearance of WLAN, determine WLAN withdraw.

Step S902, dual-mode terminal 201 initiate to exit the request of current wireless Local Area Network to Network Access Point 202, and this can pass through WLAN and directly send to Network Access Point 202; Can also be connected by the Cellular Networks between dual-mode terminal 201 and the Cellular Networks terminal module 2022 embedded by Network Access Point and send. In the case of the latter, it is connected if there is presently no one Cellular Networks of establishment between dual-mode terminal 201 and the Cellular Networks terminal module 2022 embedded by Network Access Point, then needs to be initiated and set up such connection by dual-mode terminal. Owing in the movement of this dual-mode terminal, the signal of WLAN is likely to die down suddenly or disappear, it is more reliable that latter sends mode.

Step S903, Network Access Point 202 after receiving the signalling, terminate this dual-mode terminal 201 access to WLAN, dual-mode terminal 201 WLAN withdraw.

If dual-mode terminal is currently transmitting data, then needing to carry out isomery switching, the flow process of this isomery switching is as follows:

Step S1001, dual-mode terminal 201 find signal weaker or the disappearance of WLAN, determine to carry out being switched to the isomery of Cellular Networks by WLAN.

Step S1002, dual-mode terminal 201 send WLAN withdraw to Network Access Point 202 and carry out the signaling of isomery switching, this signaling can be transmitted by WLAN, can also being connected by the Cellular Networks between dual-mode terminal 201 and the Cellular Networks terminal module 2022 embedded by Network Access Point and be transmitted, it is relatively reliable that latter sends mode. Under latter transmission mode, it is connected if there is presently no one Cellular Networks of establishment between dual-mode terminal 201 and the Cellular Networks terminal module 2022 embedded by Network Access Point, then needs to be initiated and set up such connection by dual-mode terminal. Meanwhile, the unit that dual-mode terminal is also relevant to isomery switching in Cellular Networks sends the signaling of isomery switching.

Step S1003, by dual-mode terminal 201, Network Access Point 202, Cellular Networks core net respective gateway between adopt upper-layer protocol that predetermined support isomery switch (such as mobile IP protocol, movement Stream Control Transmission Protocol etc.), current service data from remote site is turned to the respective gateway in Cellular Networks core net by the Network Access Point 202 of WLAN by the Internet 203, then is transferred to dual-mode terminal 201 by this gateway.

Step S1004, performing while isomery handover operation, Network Access Point 202 terminates the dual-mode terminal 201 access to WLAN, the WLAN withdraw of dual-mode terminal 201.

In systems in practice, Cellular Networks core net is likely to not support to switch, with isomery, the upper-layer protocol being correlated with to the transmission relevant gateway of user service data (such as the gateway that Cellular Networks core net is connected with the Internet), thus when these gateways not being upgraded, it is impossible to use above-mentioned steps S801��S805 and step S1001��1004 to realize the isomery switching of current business. In this case, by single cellular network coverage, WLAN overlay area is entered into for dual-mode terminal and is transmitting the situation of data, cellular transmission current data can be continuing with until terminating, and behind dual-mode terminal entrance WLAN overlay area, the new business opened then is transmitted by WLAN. And in this case, by WLAN overlay area, single cellular network coverage is entered into for dual-mode terminal and is transmitting the situation of data, the Cellular Networks between the Cellular Networks terminal module embedded by Network Access Point and dual-mode terminal then can be used to be connected, the Network Access Point of WLAN send the business currently transmitted to dual-mode terminal; After dual-mode terminal enters single cellular network coverage, the new business opened is transmitted by Cellular Networks.

The embodiment of the present invention one provides a kind of Cellular Networks that realizes when not changing the core net of Cellular Networks and also at most only the Access Network of Cellular Networks being carried out only small change and realizes mthods, systems and devices with WLAN Heterogeneous merges. By the method adopting the present invention to propose, when dual-mode terminal occurs by Cellular Networks to the switching of WLAN, Network Access Point can be removed the step that dual-mode terminal is authenticated from and agree to that it accesses, such that it is able to reduce the time delay of switching, and dual-mode terminal isomery of good performance switching between Cellular Networks and WLAN can be realized.

Embodiment two

The embodiment of the present invention two proposes another and realizes, by the middle website that connects, the method that Cellular Networks-WLAN Heterogeneous merges, its concrete methods of realizing is: by Cellular Networks terminal module together with WLAN terminal block combiner, website is connected in the middle of constituting, it is attached by wired mode between this Cellular Networks terminal module and this WLAN terminal module, and this wired connection exchange information such as data, signaling can be passed through; Being connected this centre in the coincidence overlay area that website is placed on certain cellular basestation and certain WLAN, the middle Cellular Networks terminal module connecting website works in the way of a common Cellular Networks terminal; Communicated by the connection of WLAN between middle WLAN terminal module and the Network Access Point of WLAN connecting website, be connected by Cellular Networks between middle Cellular Networks terminal module and the dual-mode terminal connecting website and communicate; Connect above-mentioned two connections of website by means of centre, dual-mode terminal can communicate with the Network Access Point of WLAN, exchanges the signaling relevant to heterogeneous network management, it is achieved the isomery of Cellular Networks-WLAN merges.

Realize in method what the present invention proposed, connecting website in the middle of requiring by the overlay area being simultaneously placed to certain cellular basestation and certain WLAN, this overlapping region that can be placed on the overlay area of certain cellular basestation and the overlay area of certain WLAN by centre connects website realizes. Consider Cellular Networks most area, particularly user concentrate area (in such kind of area, user is also high to the requirement of data traffic) region-wide covering can be realized, in this case, it is only necessary to centre is connected website and is placed on the overlay area of WLAN. When user area can not be carried out all region covering by Cellular Networks, the marginal portion of the overlay area of WLAN is likely to overlay area with Cellular Networks to be existed and overlaps, at this moment centre can connect website and be placed on this overlapping region and meet the status requirement to centre docking station point. When centre connection website is simultaneously in Cellular Networks and WLAN overlay area, if this centre connects the overlay area that website is also simultaneously in plural cellular basestation, its Cellular Networks terminal module adopts Cellular Networks terminal to select one of them cellular basestation of method choice of base station as its access base station. When centre connection website is simultaneously in Cellular Networks and WLAN overlay area, if this centre connects the overlay area that website is also simultaneously in plural WLAN, its WLAN terminal module adopts WLAN terminal to select one of them WLAN of the method choice network as its access of WLAN.

In typical application, the communication connection between middle Cellular Networks terminal module and the cellular basestation connecting website is only used for transmitting the signaling relevant with heterogeneous network management, and does not transmit user data, thus, only take up bandwidth only small in cellular system. But the Cellular Networks that the present invention is not precluded from by centre connects between website and cellular basestation is connected the situation transmitting data.

The middle website that connects is at the beginning of accessing WLAN, and in the middle of being namely one by it, connection website this point and its communication identifier information in Cellular Networks tell the Network Access Point of WLAN. the Network Access Point of WLAN can will thus know that it is that a centre being used for carrying out isomery fusion with Cellular Networks is connected website rather than common wireless LAN station. the middle website communication identifier information in Cellular Networks that connects refers to its Cellular Networks terminal module address in existing cellular net, label, the information such as title, other Cellular Networks terminal in this Cellular Networks can find this Cellular Networks terminal module by this communication identifier information and communicate, this communication identifier information is such as: Cellular Networks distributes to the IP address of the middle Cellular Networks terminal module connecting website, the telephone number of this Cellular Networks terminal module, international mobile subscriber identification number (IMSI, InternationalMobileSubscriberIdentity) etc., if described cellular system is UMTS (UMTS, UniversalMobileTelecommunicationsSystem), then the example of this communication identifier information also includes: Temporary Mobile Subscriber Identity number (TMSI, TemporaryMobileSubscriberIdentity), the mobile platform temporary identifier (P-TMSI of packet, PacketTemporaryMobileSubscriberIdentity), UMTS grounding wireless access network network (UTRAN, UMTSTerrestrialRadioAccessNetwork) Radio Network Temporary Identifier number (U-RNTI, UTRANRadioNetworkTemporaryIdentity), Cell Radio Network Temporary Identifier/Identity, Cell-RNTI number (C-RNTI, CellRadioNetworkTemporaryIdentity) etc., by such communication identifier information, other Cellular Networks terminal can communicate with described Cellular Networks terminal module in Cellular Networks.

Network Access Point, after obtaining middle connection website communication identifier information (connecting the communication identifier information of the Cellular Networks terminal module of website in the middle of namely) in Cellular Networks, sends this information by broadcast (usually periodically broadcasting) or the mode of clean culture to the wireless LAN station in its overlay area in a wireless local area network. When user's dual-mode terminal enters current wireless Local Area Network, the middle connection website communication identifier information in Cellular Networks can be obtained by above-mentioned broadcast or unicast info, and use this communication identifier information to initiate to be connected the communication of the Cellular Networks terminal module of website with centre, for exchanging the signaling relevant to heterogeneous network management. In some examples of above-mentioned communication identifier information, if described communication identifier information is the network address (being generally IP address) of described Cellular Networks terminal module, then dual-mode terminal can pass through to transmit the signaling relevant to heterogeneous network management to the mode of this network address transmission packet (being generally IP packet); If above-mentioned communication identifier information is telephone number or the IMSI of described Cellular Networks terminal module, dual-mode terminal then can by initiating calling to this telephone number or IMSI, the mode that then sets up connection transmit the signaling relevant to heterogeneous network management. The middle website that connects, after receiving above-mentioned relevant to the heterogeneous network management signaling of user's dual-mode terminal, forwards it to Network Access Point again through WLAN.

Network Access Point can connect website communication identifier information in Cellular Networks in the middle of MAC layer or Internet or other layer broadcast (usually periodically broadcast), for supporting that the Cellular Networks terminal module of middle docking station point is initiated to connect by dual-mode terminal. This can be realized by transmission in MAC layer or Internet or other layer (usually periodically sending) broadcast frame, these broadcast frames can be the broadcast frame of new definition, can also be add in original broadcast frame of equivalent layer represent in the middle of connect website the data item of communication identifier information or data field and the new broadcast frame that formed, such as: for 802.11 WLANs, it is possible to by adding above-mentioned data item in its MAC layer beacon frame or data field obtains new beacon frame; This can also be realized by the broadcast channel of transmission in the mac layer (usually periodically sending) mac frame, this broadcast channel can be the broadcast channel of new definition in mac frame, it can also be the new broadcast channel adding the new data item representing the middle communication identifier information connecting website or data field in original broadcast channel and being formed, such as: for HiperLAN/2 WLAN, it is possible to obtain new MAC layer broadcast channel by adding above-mentioned data item or data field in its mac frame broadcast channel.

Network Access Point can also be sent to middle connection website communication identifier information in Cellular Networks by the mode of the website transmission unicast frame under covering to it in MAC layer. These unicast frames can be the unicast frame of new definition, can also be add in original unicast frame represent in the middle of connect website the data item of communication identifier information or data field and the new unicast frame that formed, such as: for 802.11 WLANs, it is possible to response frame adds above-mentioned data item or data field obtains new inquiring after response frame by inquiring after in its MAC layer.

The Network Access Point of website and WLAN connecting and middle connecting website and dual-mode terminal connection in Cellular Networks in a wireless local area network is connected by centre, the Network Access Point of WLAN can and communication by bimode terminal, exchange the signaling relevant to heterogeneous network management.

A kind of method of two according to embodiments of the present invention, it is possible to obtain Cellular Networks-WLAN Heterogeneous emerging system.

Fig. 7 is the structural representation of a kind of Cellular Networks-WLAN Heterogeneous emerging system that the present invention proposes. In Fig. 7, number line represents wired connection, and straight dashed line represents wireless connections. System includes dual-mode terminal 701, the Network Access Point 702 of WLAN, the Internet 703, the middle part 706 connecting website 704, cellular basestation 1, cellular basestation 2 7052 and cellular communication system more top. Wherein, the part 706 of cellular communication system more top is cellular basestation above part and do not comprise cellular basestation in cellular communication system, comprises the core net of Cellular Networks wherein. The middle website 704 that connects includes WLAN terminal module 7041 and Cellular Networks terminal module 7042 two parts, is attached by wired mode between the two, and can pass through this wired connection exchange information such as data, signaling. The middle Cellular Networks terminal module 7042 connecting website 704 is connected to cellular basestation 1, dual-mode terminal 701 is connected to cellular basestation 2 7052, that is: cellular basestation 1 is the middle cellular basestation belonging to Cellular Networks terminal module 7042 connecting website 704, and cellular basestation 2 7052 is the cellular basestation belonging to dual-mode terminal 701. In Fig. 7, it is different base station that the broken box of cellular basestation 2 7052 represents that this base station is likely to from cellular basestation 1, it is also possible to be same base station with cellular basestation 1; Whether cellular basestation 1 and cellular basestation 2 7052 are that same cellular basestation depends on whether Cellular Networks terminal module 7042 and dual-mode terminal 701 have selected same base station. Due to the factor such as distribution with the relative position relation of cellular basestation, the signal intensity of cellular basestation, the middle Cellular Networks terminal module 7042 connecting website 704 and dual-mode terminal 701 can select that same cellular basestation, it is also possible to select different cellular basestations.

Communicated by the connection of WLAN between the Network Access Point 702 of WLAN terminal module 7041 and WLAN, be connected by Cellular Networks between Cellular Networks terminal module 7042 with dual-mode terminal 701 and communicate;

Connected above-mentioned two connections of website 704 by centre, dual-mode terminal 701 can communicate with the Network Access Point 702 of WLAN, exchanges the signaling relevant to heterogeneous network management, it is achieved Cellular Networks-WLAN Heterogeneous merges.

For the Cellular Networks shown in Fig. 7-WLAN Heterogeneous emerging system, it is whether the difference of the situations such as same base station according to wherein cellular basestation 1 and cellular basestation 2 7052, it is possible to obtain the concrete structure of Cellular Networks-WLAN Heterogeneous emerging system proposed by the invention as shown in Figure 8, Figure 9. Wherein, Fig. 8 is cellular basestation one and cellular basestation two is isomery emerging system during same cellular basestation (i.e. cellular basestation 805), and Fig. 9 is cellular basestation one and cellular basestation two is isomery emerging system during different cellular basestation.

The signalling relevant with heterogeneous network management between dual-mode terminal 701 to the middle Cellular Networks terminal module 7042 connecting website 704 can be realized by following two mode.

First kind of way is the Cellular Networks signaling relevant to heterogeneous network management that the design of the Access Network to Cellular Networks is new, and dual-mode terminal 701 and the middle Cellular Networks terminal module 7042 connecting website 704 directly can send this signaling to the other side in Cellular Networks. This kind of mode needs the Access Network to Cellular Networks to carry out only small change.

Another way is to be encapsulated in packet by the signaling relevant to heterogeneous network management, become the load of Cellular Networks Frame to be transmitted this data packet encapsulation again, is about to the signaling relevant to heterogeneous network management and is encapsulated in packet to be transmitted as the data payload of Cellular Networks. Here packet, is generally IP packet, it is also possible to be other type of packet. In this signalling mode, before starting to transmit signaling, needing to be initiated and set up in Cellular Networks the connection of a transmission packet by the side (dual-mode terminal 701 or the middle Cellular Networks terminal module 7042 connecting website 704) communicated, both sides' (dual-mode terminal 701 and middle Cellular Networks terminal module 7042 connecting website 704) connect exchange of signaling by this thereafter. The Access Network of Cellular Networks need not be modified by this kind of mode.

Dual-mode terminal transmits the signaling relevant with heterogeneous network management to the middle Cellular Networks terminal module connecting website by Cellular Networks, comprising the link of dual-mode terminal and the communication unit in corresponding Cellular Networks and the middle Cellular Networks terminal module connecting website and the communication unit exchange of signaling in corresponding Cellular Networks, the two link is possible with different modes and transmits the signaling relevant to heterogeneous network management.

It is connected in the communication between the Cellular Networks terminal module of website at dual-mode terminal with centre, by the broadcast of aforementioned network access point or mode of unicast send in the middle of connect the communication identifier information of Cellular Networks terminal module 7042 of website 704, dual-mode terminal 701 is by can by directly transmitting Cellular Networks signaling method or/and the mode being encapsulated in packet to send signaling sends the signaling relevant to heterogeneous network management to centre connection website 704. Centre connects website 704 and then by WLAN connection, these signalings is sent to Network Access Point 702.

By using the signaling relevant to the heterogeneous network management load as packet and and then the method that realizes that is transmitted as the load of block domain data frame as shown in Figure 10 and Figure 11, wherein, Figure 10 is that the middle website that connects sends the situation of the signaling relevant to heterogeneous network management by its Cellular Networks terminal module to dual-mode terminal, and Figure 11 is that dual-mode terminal passes through Cellular Networks and connects the situation to the centre connection website transmission signaling relevant to heterogeneous network management. In Fig. 10, first the signaling relevant to heterogeneous network management be encapsulated in packet by the middle Cellular Networks terminal module connecting website, the load that this data packet encapsulation becomes the Frame of Cellular Networks packet domain again is transmitted, dual-mode terminal decapsulates after receiving this Cellular Networks Frame, obtains packet and signaling successively. In fig. 11, first the signaling relevant to heterogeneous network management be encapsulated in packet by dual-mode terminal, the load that this data packet encapsulation becomes the Frame of Cellular Networks packet domain again is transmitted, the middle Cellular Networks terminal module connecting website decapsulates after receiving this Cellular Networks Frame, obtains packet and signaling successively.

In the application of some occasion, may there is dual-mode terminal or the situation of the middle signaling that Cellular Networks terminal module exchanges and heterogeneous network management is relevant connecting website to Cellular Networks, this connects, by dual-mode terminal or centre, the signaling that the Cellular Networks terminal module of website exchanges with the communication unit in corresponding Cellular Networks and heterogeneous network management is correlated with and realizes. communication unit in this Cellular Networks corresponding with the Cellular Networks terminal module of dual-mode terminal or middle connection website is likely located in the part of cellular basestation or cellular communication system more top. what adopt the signaling relevant with heterogeneous network management being connected with centre between the Cellular Networks terminal module of website to dual-mode terminal transmits similar method, the transmission of the signaling relevant with heterogeneous network management between dual-mode terminal with the communication unit in corresponding Cellular Networks, or the transmission of the signaling relevant with heterogeneous network management between Cellular Networks terminal module and the communication unit in corresponding Cellular Networks of centre connection website, also by aforesaid two ways, namely Cellular Networks signaling method is directly transmitted or/and signaling is encapsulated in the mode of transmission in packet and realizes. the signaling relevant to heterogeneous network management transmission between the Network Access Point and the middle WLAN terminal module being connected website of WLAN can be realized by following three kinds of modes.

First kind of way is due up Network Access Point and connects the data transmission of MAC layer between website to centre only for transmitting the signaling relevant with heterogeneous network management, i.e. agreement: if Network Access Point is connected between website with centre transmits data in MAC layer, then these data must be the signaling relevant to heterogeneous network management. Based on this agreement, when receiving terminal receives data channel (such as: the long transmission channel (LCH channel) of mac frame in HiperLAN/2 WLAN) in the mac frame (such as: the mac frame of Type=Data in 802.11 WLANs) of data type or mac frame every time, namely may know that corresponding data load is the signaling relevant to heterogeneous network management, thus these data load of extracting directly can obtain the signaling relevant to heterogeneous network management.

The second way is that to indicate the load of current MAC frame by the agreement in mac frame be the signaling relevant to heterogeneous network management. This can pass through the mac frame (such as: 802.11 WLANs define the mac frame of the Type=Management of new types) to the WLAN new type of definition or the mac frame to defined type defines new subtype (such as: 802.11 WLANs define the Action frame of new subtype) and realizes, and the subtype of the frame type mark of the mac frame of this new type or the mac frame of new subtype identifies the agreement mark being in described mac frame. Receiving terminal is after receiving a mac frame, know that the load of this mac frame is the signaling relevant to heterogeneous network management by the agreement mark in described mac frame, thus the load of received mac frame can be extracted, obtain the corresponding signaling relevant to heterogeneous network management.

The third mode is that to indicate the load of current data frame by Internet or Internet with the agreement in the Frame of upper strata (such as: transport layer, application layer) be the signaling relevant to heterogeneous network management. Such as: this can by define in Internet a kind of new type Frame or to Internet in the Frame of defined type define new subtype and realize, the subtype mark of the Frame of the frame type of the Frame of this new type mark or new subtype is the agreement mark in described network layer data frame. Receiving terminal is after Internet or Internet receive a Frame with upper strata, the load knowing this Frame by described agreement mark is the signaling relevant to heterogeneous network management, thus the load of received Frame can be extracted, obtain the corresponding signaling relevant to heterogeneous network management. In this mode, receiving terminal is after Internet or Internet receive the signaling relevant to heterogeneous network management with upper strata, it is possible to also need to by Internet or Internet with the communication between upper strata and MAC layer, by this signalling to MAC layer, for it.

In isomery emerging system shown in Fig. 7 to Fig. 9, dual-mode terminal judges to select WLAN transmit data or select Cellular Networks to transmit data according to predetermined criterion. Dual-mode terminal includes judgement unit and network selection unit. Wherein, it determines unit, for judging to select WLAN transmit data or select Cellular Networks to transmit data according to predetermined criterion; Network selection unit, for carrying out the operation of corresponding network selection according to the result of described judgement unit.

The criterion that Cellular Networks and WLAN are carried out evaluation by dual-mode terminal has described above, as: include signal strength criterion, WLAN prioritization criteria, service quality (QoS, QualityofService) can meet the signal strength criterion under premise, QoS can meet under premise WLAN prioritization criteria etc. Specific embodiments of the invention are not limited to these criterions, other criterion selection WLAN can be adopted still to transmit data by Cellular Networks.

For the Cellular Networks shown in Fig. 7-WLAN Heterogeneous emerging system, access when dual-mode terminal is entered the WLAN area of coverage by the Cellular Networks area of coverage and entered the Cellular Networks area of coverage by the WLAN area of coverage, WLAN withdraw are described below and carry out the flow process of isomery switching.

First, investigate and access WLAN when dual-mode terminal is entered into WLAN overlay area by cellular network coverage and carry out the flow process of isomery switching.

If Cellular Networks working region is realized region-wide covering or dual-mode terminal find WLAN time be not at cellular network coverage edge (as: it now finds that the signal of Cellular Networks is still stronger) following flow process can be adopted:

Step S1101, dual-mode terminal 701 enter WLAN overlay area, it has been found that Network Access Point 702, and now dual-mode terminal 701 find the signal of its Cellular Networks still relatively strong, be not at the edge of cellular network coverage; Dual-mode terminal 701 extracts the middle connection website 704 communication identifier information in Cellular Networks from the broadcast frame of Network Access Point 702.

Step S1102, dual-mode terminal 701 are connected website 704 by Cellular Networks to centre by above-mentioned communication identifier information initiates to connect, and and then set up connect, then the request that is sent to accesses the signaling of WLAN, comprises the MAC Address of dual-mode terminal 701 WLAN network interface card in this signaling; Centre connects the website 704 connection again through WLAN and this signaling is transmitted to the Network Access Point 702 of WLAN.

Step S1103, must being have already been through certification and the mandate of Cellular Networks owing to using the terminal that communicates of cellular system, therefore dual-mode terminal 701 can not be authenticated and directly be considered as it and have passed through certification by Network Access Point 702.

Requirement according to operator is different, and Network Access Point 702 is likely to the part 705 also needed to cellular communication system more top and examines whether this dual-mode terminal 701 has opened the service of WLAN, and it then could be allowed to access WLAN. In this case, Network Access Point 702 sends signaling to core net, and whether inquiry dual-mode terminal 701 has opened the business of WLAN. If showing that existing cellular network termination module user has opened WLAN service from the information of core net feedback, then Network Access Point 702 accesses WLAN by accepting this dual-mode terminal 701. If operator arranges all of Cellular Networks terminal use and all has the authority using WLAN, then Network Access Point 702 avoids the need for carrying out this and examines and allow dual-mode terminal 701 to use WLAN transmission data.

If WLAN current for step S1104 adopts coded communication, then Network Access Point 702 feeds back a signaling agreeing to access by centre connection website 704 to dual-mode terminal 701, wherein comprises the key that WLAN is currently used. After dual-mode terminal 701 receives this signaling and key therein, in the way of encryption, send access request to Network Access Point 702 in a wireless local area network, after Network Access Point verification MAC Address, accept it and access.

If current WLAN does not adopt coded communication, one of following two mode then can be used to realize the access to dual-mode terminal 701: (1) Network Access Point 702 sends the signaling agreeing to its access on one's own initiative at WLAN to double; two terminals 701, this signaling comprises the MAC Address of dual-mode terminal WLAN network interface card, dual-mode terminal 701 makes response, accepts access; (2) Network Access Point 702 sends a signaling agreeing to access by centre connection website 704 to dual-mode terminal 701, after dual-mode terminal 701 receives this signaling, access request is sent in a wireless local area network to Network Access Point 702, Network Access Point 702 checks MAC Address, it is achieved access.

Step S1105, if currently transmitting data, and according to the criterion that network selects, select WLAN, then need to carry out the operation (otherwise not carrying out this operation) of following isomery switching: by dual-mode terminal, Network Access Point, the upper-layer protocol that predetermined support isomery switches is adopted (such as: mobile IP protocol between the respective gateway of Cellular Networks core net, mobile Stream Control Transmission Protocol etc.), transferred to by the Internet by the respective gateway in Cellular Networks core net from the current service data of remote site and the Network Access Point of WLAN is transmitted further to dual-mode terminal, complete isomery switching.

Dual-mode terminal find WLAN time if it find that oneself be also at or be likely to be at cellular network coverage edge (as: it now finds that the signal of Cellular Networks is more weak), then it likely can not be exchanged by whole signaling that middle connection website completes with Network Access Point before leaving Cellular Networks, now can adopt following flow process:

Step S1201, dual-mode terminal 701 enter WLAN overlay area, it has been found that Network Access Point 702, and now dual-mode terminal 701 finds the signal weaker of Cellular Networks or disappearance, is likely to be at the edge of cellular network coverage.

Step S1202, dual-mode terminal 701 directly initiate to access the request of current wireless Local Area Network to Network Access Point 702 by WLAN, hereafter exchange of signaling between Cellular Networks core net, Network Access Point, dual-mode terminal, the certification to dual-mode terminal and mandate is realized by the verification with the user profile in Cellular Networks core net, dual-mode terminal accesses WLAN, and wherein Cellular Networks core net is realized by the Internet with the signaling exchange of Network Access Point.

The information of its signal(l)ing condition information in Cellular Networks and its wireless lan network access point accessed is sent to Cellular Networks by wireless lan network access point and the middle website that connects by step S1203, dual-mode terminal.

Step S1204, Cellular Networks determine the connection status of it and dual-mode terminal according to its signal(l)ing condition information in Cellular Networks that dual-mode terminal provides, and this information is connected website and wireless lan network access point is sent to dual-mode terminal either directly through Cellular Networks (if Cellular Networks still can use) or by middle, after receiving this information, dual-mode terminal arranges the connection status of it and Cellular Networks.

If step S1205 is currently transmitting data, and according to the criterion that network selects, will select WLAN, then need to carry out the operation (otherwise not carrying out this operation) of following isomery switching. Now, owing to Cellular Networks has been known for the address of the wireless lan network access point that current data will forward, therefore, by dual-mode terminal, Network Access Point, Cellular Networks core net respective gateway between adopt the upper-layer protocol (such as: mobile IP protocol, mobile Stream Control Transmission Protocol etc.) that predetermined support isomery switches, transferred to by the Internet by the respective gateway in Cellular Networks core net from the current service data of remote site and the Network Access Point of WLAN is transmitted further to dual-mode terminal, complete isomery switching.

Then, investigate WLAN withdraw and the flow process carrying out isomery switching when dual-mode terminal is entered into cellular network coverage by WLAN overlay area, specific as follows:

Step S1301, dual-mode terminal 701 find signal weaker or the disappearance of WLAN, determine WLAN withdraw.

Step S1302, dual-mode terminal 701 initiate to exit the request of current wireless Local Area Network to Network Access Point 702, and this can pass through WLAN and directly send to Network Access Point 702; Can also be sent by connection this connection of website 704-Network Access Point 702 in the middle of dual-mode terminal 701-. In the case of the latter, there is presently no one Cellular Networks connection of establishment if dual-mode terminal 701 is connected between website 704 with centre, then need to be initiated and set up such connection by dual-mode terminal 701. Owing in the movement of this dual-mode terminal, the signal of WLAN is likely to die down suddenly or disappear, it is more reliable that latter sends mode.

Step S1303, Network Access Point 702 after receiving the signalling, terminate this dual-mode terminal 701 access to WLAN, dual-mode terminal 701 WLAN withdraw.

Step S1401, dual-mode terminal 701 find signal weaker or the disappearance of WLAN, determine to carry out being switched to the isomery of Cellular Networks by WLAN.

Step S1402, dual-mode terminal 701 send WLAN withdraw to Network Access Point 702 and carry out the signaling of isomery switching, this signaling can be transmitted by WLAN, can also being transmitted by connection this connection of website 704-Network Access Point 702 in the middle of dual-mode terminal 701-, it is relatively reliable that latter sends mode. Under latter transmission mode, there is presently no one Cellular Networks connection of establishment if dual-mode terminal 701 is connected between website 704 with centre, then need to be initiated and set up such connection by dual-mode terminal 704. Meanwhile, the unit that dual-mode terminal 701 is also relevant to isomery switching in Cellular Networks sends the signaling of isomery switching.

Step S1403, by dual-mode terminal 701, Network Access Point 702, Cellular Networks core net respective gateway between adopt the upper-layer protocol (such as: mobile IP protocol, movement Stream Control Transmission Protocol etc.) that predetermined support isomery switch, current service data from remote site is turned to the respective gateway in Cellular Networks core net by the Network Access Point 702 of WLAN by the Internet 703, then is transferred to dual-mode terminal 701 by this gateway.

Step S1404, performing while isomery handover operation, Network Access Point 702 terminates the dual-mode terminal 701 access to WLAN, the WLAN withdraw of dual-mode terminal 701.

Similar with the situation in embodiment one, in systems in practice, gateway relevant to transmission user service data in Cellular Networks core net is likely to not support the upper-layer protocol relevant with isomery switching, thus when these gateways not being upgraded, it is impossible to use above-mentioned steps to realize the isomery switching of current business. In this case, by WLAN overlay area, cellular network coverage is entered into for dual-mode terminal and is transmitting the situation of data, the Cellular Networks that the WLAN between Network Access Point and the middle WLAN terminal module connecting website connects between middle Cellular Networks terminal module and the dual-mode terminal connecting website can be used to be connected, the Network Access Point of WLAN send the business currently transmitted to dual-mode terminal; After dual-mode terminal enters cellular network coverage, the new business opened is transmitted by Cellular Networks.

The embodiment of the present invention two additionally provides and connects website in the middle of one, including:

It is connected with above-mentioned two of WLAN and Cellular Networks by described WLAN terminal module and Cellular Networks terminal module, described dual-mode terminal can communicate with the Network Access Point of described WLAN, exchange the signaling relevant to heterogeneous network management, it is achieved Cellular Networks-WLAN Heterogeneous merges.

The embodiment of the present invention two also provides a kind of mthods, systems and devices realizing Cellular Networks and WLAN Heterogeneous fusion when not changing the core net of Cellular Networks and also at most only the Access Network of Cellular Networks being carried out only small change. By the method adopting the present invention to propose, when dual-mode terminal occurs by Cellular Networks to the switching of WLAN, on the one hand, when working region is realized better covering by Cellular Networks, Network Access Point can be removed the step that dual-mode terminal is authenticated from and agree to that it accesses, such that it is able to reduce the time delay of switching, on the other hand, when working region can not be realized better covering by Cellular Networks, WLAN can be used to the realization of the overlay area to Cellular Networks and mends blind, such that it is able to solve the covering problem of Cellular Networks. By the method adopting the present embodiment, will be carried out dual-mode terminal isomery of good performance switching between Cellular Networks and WLAN.

Unless otherwise specific statement, term such as processes, calculates, computing, determine, display etc. can refer to that one or more processes or the action of computing system or similar devices and/or process, described action and/or process will be indicated as the data manipulation that the physics (such as electronics) in the depositor of process system or memorizer is measured and other data being converted into the physical quantity being similarly represented as in the memorizer of process system, depositor or the storage of other this type of informations, transmitting or display device. What information and signal can use in multiple different technology and method any represents. Such as, data, instruction, order, information, signal, bit, symbol and the chip mentioned in running through above description can represent with voltage, electric current, electromagnetic wave, magnetic field or particle, light field or particle or its combination in any.

Should be understood that the particular order of the step in disclosed process or level are the examples of illustrative methods. Based on design preference, it should be appreciated that the particular order of the step in process or level can be rearranged when without departing from the protection domain of the disclosure. Appended claim to a method gives the key element of various step with exemplary order, and is not limited to described particular order or level.

In above-mentioned detailed description, various features are combined in single embodiment together, to simplify the disclosure. Should not be construed to reflect such intention by this open method, i.e. the embodiment of theme required for protection needs feature more more than the feature clearly stated in each claim. On the contrary, as the following claims reflect, the present invention is in the state fewer than whole features of disclosed single embodiment. Therefore, appending claims is hereby expressly incorporated in detailed description, and wherein each claim is alone as the preferred embodiment that the present invention is independent.

It should also be appreciated by one skilled in the art that the various illustrative box, module, circuit and the algorithm steps that describe in conjunction with the embodiments herein all can be implemented as electronic hardware, computer software or its combination. In order to clearly demonstrate the interchangeability between hardware and software, above various illustrative parts, frame, module, circuit and step are all generally described around its function. It is implemented as hardware as this function and is also implemented as software, depend on specific application and the design constraint that whole system is applied. Those skilled in the art for each application-specific, can realize described function in the way of flexible, but, this realize decision-making and should not be construed as the protection domain deviating from the disclosure.

For performing the general processor of herein described function, digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other PLD, discrete gate or transistor logic, discrete hardware components or its combination in any, it is possible to achieve or perform in conjunction with the various illustrative logic diagram described by the embodiments herein, module and circuit. General processor can be microprocessor, or, this processor can also be the processor of any routine, controller, microcontroller or state machine. Processor is likely to the combination being embodied as computing equipment, for instance, the combination of DSP and the combination of microprocessor, multi-microprocessor, one or more microprocessor and DSP core, or other this kind of structure any.

Step in conjunction with the method described by the embodiments herein or algorithm can be embodied directly in hardware, the processor software module performed or its combination. Software module may be located in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, depositor, hard disk, mobile disk, CD-ROM or other form any well known in the art. A kind of exemplary storage medium is connected to processor, thus enabling a processor to from this read information, and can write information to this storage medium. Certainly, storage medium can also be the ingredient of processor. Processor and storage medium may be located in ASIC. This ASIC may be located in user terminal. Certainly, processor and storage medium can also be present in user terminal as discrete assembly.

For making any technical staff in this area be capable of or use the present invention, above disclosed embodiment is described. To those skilled in the art; The various amendment modes of these embodiments will be apparent from, and generic principles defined herein can also be applicable to other embodiments on the basis without departing from the spirit and scope of the disclosure. Therefore, the disclosure is not limited to embodiments set forth herein, but consistent with the widest scope of principle disclosed in the present application and novel features.

Realizing for software, technology described in this application can use the module (such as, process, function etc.) performing herein described function to realize. These software codes can be stored in memory cell and be performed by processor. Memory cell can be implemented in processor, it is also possible to realizing outside processor, in the case of the latter, it is communicably coupled to processor via various means, and these are all well known in the art.

And, various aspects or features described herein can realize as the programming of the standard of use and/or the method for engineering, device or goods. Term as used herein " goods " is the computer program including to access from any computer-readable equipment, carrier wave or medium. Such as, computer-readable medium can include but not limited to magnetic storage apparatus (such as, hard disk, floppy disk, tape etc.), CD (such as, compact discs (CD), digital versatile disc (DVD) etc.), smart card and flash memory device (such as, EPROM, card, rod, Keyed actuator etc.). Additionally, various storage media described herein is expressed as the one or more equipment for storing information and/or other machine readable media. Term " machine readable media " includes but not limited to store, comprise and/or carry the wireless channel of instruction and/or data and other medium various.

Described above includes the citing of one or more embodiment. Certainly, all possible combination describing parts or method in order to describe above-described embodiment is impossible, but it will be appreciated by one of ordinary skill in the art that each embodiment can do further combinations and permutations. Therefore, embodiment described herein is intended to all such changes, modifications and variations of falling in the protection domain of appended claims. Additionally, with regard in description or claims use term " comprising ", the mode that contains of this word is similar to term " including ", just as " including, " in the claims be used as link word explain such. Additionally, any one term being used in the description of claims " or " it is to represent " non-exclusionism or ".

Claims

1. the method that Cellular Networks-WLAN Heterogeneous merges, it is characterised in that including:

2. the method for claim 1, it is characterised in that the method that described Network Access Point connects the site switch signaling relevant with heterogeneous network management to described dual-mode terminal by centre, particularly as follows:

3. method as claimed in claim 2, it is characterised in that described communication identifier information, particularly as follows:

4. method as claimed in claim 2, it is characterised in that described communication identifier information is the IP address that the telephone number of described Cellular Networks terminal module or international mobile subscriber identity IMSI or Cellular Networks distribute to described Cellular Networks terminal module; Or

5. method as claimed in claim 2, it is characterised in that described Network Access Point, by connecting the communication identifier information of website in the middle of wireless local area networks broadcast, realizes especially by the following manner:

6. the system that a Cellular Networks-WLAN Heterogeneous merges, it is characterised in that including: dual-mode terminal, WLAN Network Access Point, middle connect website, cellular basestation, the part of cellular communication system more top and the Internet;

7. system as claimed in claim 6, it is characterized in that, described by described middle above-mentioned two connections connecting website, the Network Access Point of described dual-mode terminal and described WLAN communicates, exchange the signaling relevant to heterogeneous network management, particularly as follows:

It, at the beginning of accessing WLAN, is the Network Access Point that middle connection website this point and its communication identifier information in Cellular Networks tell WLAN by the middle website that connects;

8. system as claimed in claim 7, it is characterised in that described communication identifier information, particularly as follows:

9. system as claimed in claim 7, it is characterised in that described communication identifier information is the IP address that the telephone number of described Cellular Networks terminal module or international mobile subscriber identity IMSI or Cellular Networks distribute to described Cellular Networks terminal module; Or

10. a middle connection website, it is characterised in that including: