CN101299696B - Mobile LAN and method for implementing service continuity - Google Patents

Mobile LAN and method for implementing service continuity Download PDF

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Publication number
CN101299696B
CN101299696B CN200710102026.7A CN200710102026A CN101299696B CN 101299696 B CN101299696 B CN 101299696B CN 200710102026 A CN200710102026 A CN 200710102026A CN 101299696 B CN101299696 B CN 101299696B
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access
network
protocol stack
communication
access network
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CN101299696A (en
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树贵明
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN200710102026.7A priority Critical patent/CN101299696B/en
Priority to PCT/CN2007/003889 priority patent/WO2008131622A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/005—Control or signalling for completing the hand-off involving radio access media independent information, e.g. MIH [Media independent Hand-off]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Abstract

The invention discloses a mobile LAN and method for implementing service continuity, wherein, the mobile LAN uses a first communication chain circuit based on a first protocol to execute service between service networks; when the mobile LAN discover its own communication capability cannot satisfy the communication requirement, the mobile LAN determines an object communication chain circuit based on a second protocol; and then switches the present communication chain circuit into the object communication chain circuit. By the invention, the mobile LAN can provide support for service succession in different media types of wireless networks, thereby implementing seamless switch.

Description

Mobile LAN and realize the method for business continuance
Technical field
The present invention relates to the communications field, relate in particular to the technology that realizes mobile local business continuance.
Background technology
Along with the development of mechanics of communication, the reality that polytype media network coexists in a certain coverage has appearred, can support simultaneously also be accompanied by user's demand and produce with the multi-mode terminal equipment of multiple network communication.Due to the difference of heterogeneous networks coverage and professional ability, the user wishes to use the terminal equipment of oneself can realize seamless switching between dissimilar media network, thereby guarantees the continuity of own business.for such demand, 802.21 agreement has proposed a kind of framework of realizing the media-independent handed over service for multimode terminal, as shown in Figure 1, can find out, it increases a media-independent switchable layer between two layers (MAC layer) and three layers (network layer) of network entity protocol stack, and defined the upper of this layer and protocol stack, lower floor, the interface of NMS (network management system) and same layer MIH (media-independent switching) inter-entity, realize between dissimilar media network for multimode terminal that by this media-independent switchable layer seamless switching provides event, order, information service.
The mobile LAN network is the LAN that is in mobile environment, it comprises polytype equipment, these equipment are by wireless, wired pattern, form LAN in mobile environment with the structure of star-like, annular or Ad hoc (MANET), as in order to carry out Multi-Party Conference on the car that travels, the audio ﹠ video equipment of every convention goer in car is formed local area network (LAN) in a car.
Described mobile LAN when realizing business, need to the wireless communication networks of neighboring area, namely wide area network connects, and further is linked into oneself enterprise network or other mobile LAN.For this reason, at least comprise a radio reception device with wireless access capability in described mobile LAN, and one to the mobile LAN internal unit carry out control and management the local gateway device (can be physically independently equipment or be subordinated to the logic gateway device of a certain radio reception device).Described radio reception device is the communication link that the equipment in mobile LAN is provided to wide area network, i.e. equipment in responsible mobile LAN and the protocol conversion between wide area network, and the data interaction between realizing both based on described protocol conversion function; Described local gateway device one side is forwarded to the equipment of described mobile LAN inside with the packet from wide area network that described radio reception device receives, and the Packet Generation that simultaneously the mobile LAN internal unit is sent is to described radio reception device.
In order to guarantee the continuity of mobile LAN network business in moving process, art methods is normally: in the time of in mobile LAN is in the coverage that the wireless network of certain type covers, described mobile LAN ruton is crossed the wireless network of gateway device in it and radio reception device and covering this coverage and is set up communication link, and further is linked into the enterprise network of oneself or the LAN in other mobile environment; When described mobile LAN moves in another coverage of wireless network of same type, by radio reception device and the common handover mechanism of supporting of described wireless network, radio reception device carries out seamless switching between the different coverages of described wireless network, thereby guarantees the continuity of the business of equipment in mobile LAN.
Can be found out by prior art, existing mobile LAN can provide the support to business continuance in the different coverages that media network of the same type covers, but when it moves, but can not provide the support to business continuance between the wireless network of different media types.
Summary of the invention
Embodiments of the invention provide a kind of mobile LAN and realize the method for business continuance, and it can make the mobile LAN network that support to business continuance is provided in the wireless network of different media types, realizes seamless switching.
Embodiments of the invention are achieved through the following technical solutions:
The embodiment of the present invention provides a kind of mobile LAN to realize the method for business continuance, and it comprises:
Mobile LAN is according to current the first communication link based on the first agreement, carry out and business network between business;
When described mobile LAN finds that the communication capacity of oneself can not satisfy communication requirement, by having the multimodality equipment of supporting the first access network and the second access network wireless access capability in mobile LAN, seek target access network;
Has the multimodality equipment of supporting the first access network and the second access network wireless access capability in mobile LAN, according to current be the relevant information that the first access network of described multimodality device service obtains, the target access network of selecting to switch is the second access network;
By the media-independent switchable layer of described multimodality devices communicating protocol stack, send and switch indication to the second medium type link layer of described the second access network and described multimodality devices communicating protocol stack; Receive the media-independent switchable layer of the described second access network access point POA devices communicating protocol stack of described switching indication, the link layer to the second access network POA devices communicating protocol stack is indicated in the described switching of transfer;
Receive the link layer of the second access network POA devices communicating protocol stack of described switching indication, the second medium type link layer with described multimodality devices communicating protocol stack, based on the link establishment order of the second access network agreement, set up the destinations traffic link between described mobile LAN and described the second access network.
The embodiment of the present invention also provides a kind of mobile LAN, comprise at least one terminal equipment, in described terminal equipment, at least one has the multimodality function, the communication capacity of finding self is used for when can not satisfy communication requirement, send handover request and seek target access network, according to the relevant information that current access network obtains, select the target access network of switching, send and switch indication to the POA equipment of described target access network; The communication protocol stack link layer to target access network POA equipment is indicated in the described switching of transfer; The POA equipment of described target access network receives described switching indication, with described the second medium type link layer with terminal equipment communication protocol stack of multimodality function, based on the link establishment order of second protocol, sets up the destinations traffic link.
The embodiment of the present invention also provides another kind of mobile LAN, comprise a plurality of terminal equipments, in described terminal equipment, at least one has the access capability of supporting the first access network, and at least one has the described terminal equipment with access capability of supporting the first access network of the access capability of supporting the second access network and comprises;
The media-independent switchable layer entity of the link layer entity of the first medium type communication protocol stack, communication protocol stack and the upper layer entity of communication protocol stack;
The link layer entity of described the first medium type communication protocol stack, the communication capacity of finding oneself is used for when can not satisfy communication requirement, send handover request, and be given to the upper layer entity of described communication protocol stack in the irrelevant switchable layer entity by described communication protocol stack;
The upper layer entity of described communication protocol stack, after being used for receiving described handover request, relevant information according to current access network acquisition, the target access network of selecting to switch is the second access network, and informs the link layer entity of described the first medium type communication protocol stack by described communication protocol stack media-independent switchable layer entity;
The link layer entity of described the first medium type communication protocol stack carries out capability query by the media-independent switchable layer entity of communication protocol stack, and according to the capability query result that obtains, knows the terminal equipment that can be linked into described the second access network;
By the media-independent switchable layer entity of described communication protocol stack, send and switch indication, give described the second access device and described the second access network access point POA equipment.
Can be found out by the specific embodiments that the embodiment of the invention described above provides, when described mobile LAN finds that own communication capacity can not satisfy communication requirement, definite destinations traffic link based on second protocol; And current communication link is switched to described destinations traffic link, therefore, described mobile LAN can provide the support to business continuance in the wireless network of different media types.
Description of drawings
802.21 diagram of protocol architecture that Fig. 1 provides for background technology;
Fig. 2 is the flow chart of first embodiment of the invention;
Fig. 3 passes through multi-mode terminal equipment C in first embodiment of the invention, realize the flow chart of mobile LAN business continuance;
Fig. 4 is the flow chart in second embodiment of the invention;
Fig. 5 passes through terminal equipment A and terminal equipment B in second embodiment of the invention, realizes the flow chart of mobile LAN business continuance;
Fig. 6 is the structure chart of the 3rd embodiment provided by the invention;
Fig. 7 is the structure chart of the 4th embodiment provided by the invention.
Embodiment
The first embodiment provided by the invention is a kind of method that mobile LAN is realized business continuance, when mobile LAN moves in the coverage that different media types covers, it is by having simultaneously the multimodality equipment of supporting the first access network communication function and supporting the second access network communication function, as multi-mode terminal equipment, realize the continuity of the ongoing business of equipment in it.Its flow process comprises as shown in Figure 2:
Step S101, mobile LAN is by having the multimodality equipment of supporting the first access network wireless access capability, the first communication link based on the first agreement, be linked into the first access network, according to the mutual information of described the first access network, carry out and business network between business.
When mobile LAN is in the coverage of the first access network, the first agreement communication mode that described mobile LAN is supported by the access device in it provides the first communication link as up access way for other terminal equipment in mobile LAN is linked into wide area network.Impact due to factors such as the mobile LAN position is moved, environment, described up access capability cause the up access capability of the first communication mode of described multimodality equipment to reduce, to such an extent as to can not satisfy the communication need of the terminal equipment in mobile LAN.At this moment, described multimodality equipment can be determined the destinations traffic link based on second protocol; And current communication link is switched to described destinations traffic link.Specific as follows:
Step S102, find that the first communication link can not satisfy the communication need of the terminal equipment in mobile LAN, by having the multimodality equipment of supporting the first access network and the second access network wireless access capability in mobile LAN, seek target access network; According to the target access network that searches out, set up described mobile LAN to the destinations traffic link based on second protocol between described target access network, and current communication link is switched to described destinations traffic link.
in step S102, have communication protocol stack the first medium type link layer of supporting the first access network communication function in described multimodality equipment and find that its up access capability based on the first communication mode of the first agreement descends, be not enough to satisfy the communication need of the terminal equipment in mobile LAN, just send handover request to the communication protocol stack media-independent switchable layer of multimodality equipment, described communication protocol stack media-independent switchable layer should ask further to be sent to the communication protocol stack upper strata, described communication protocol stack upper strata is according to POA (the Point of Attachments of the first access network of current service, access point) relevant information of equipment acquisition is carried out handover decisions, select the POA of the target access network of switching, be assumed to be the second access network,
After handover decisions is made on the upper strata of multimodality equipment, feed back switching request response by the media-independent switchable layer to communication protocol stack the first medium type link layer that sends handover request.simultaneously, communication protocol stack media-independent switchable layer sends the switching indication to having communication protocol stack the second medium type link layer and the communication protocol stack media-independent switchable layer in current service POA of supporting the second access network communication function, send the switching indication by the media-independent switchable layer in current service POA to have communication protocol stack link layer and the communication protocol stack media-independent switchable layer in target P OA of supporting the first access network communication function in current service POA again, and further will indicate by the communication protocol stack media-independent switchable layer in target P OA the communication protocol stack link layer of supporting the second access network communication function that has of notifying in target P OA,
Receive between the communication protocol stack link layer of the communication protocol stack second medium type link layer of the multimodality equipment that switches indication and target P OA, link establishment order by second protocol, set up the second communication link between mobile LAN and the second access network, i.e. the destinations traffic link;
After the second communication link establishment, communication protocol stack the second medium type link layer in described multimodality equipment and the communication protocol stack link layer of described target P OA, complete order by the foundation based on the second communication link of second protocol, notice arrives communication protocol stack media-independent switchable layer separately, is further notified to the communication protocol stack upper strata that needs this message by communication protocol stack media-independent switchable layer;
Multimodality equipment complete the second communication link set up process after, with up incoming communication link, switch to newly-established second communication link by described the first communication link, and remove original the first communication link.So far, complete the handoff procedure that described the first current communication link arrives described destinations traffic link.
Step S103, described multimodality equipment by described destinations traffic link based on second protocol, and carries out data-bag interacting between described target access network, and carries out business between mobile LAN and described business network according to mutual packet.
During step S103 specific implementation, generally by the local gateway device in mobile LAN, the network communication address that is linked into the terminal equipment in mobile LAN is distributed, managed; After by the wireless access function of described multimodality equipment, communication link being set up, after described multimodality equipment will carry out protocol conversion from the packet of wide area network, send to the local gateway device of described mobile LAN inside, described local gateway device is according to predefined strategy, and/or to the QOS of the different business on the terminal equipment in mobile LAN, described packet is carried out control and management, according to the network communication address of described terminal equipment, with the terminal equipment that allows the packet delivery of transmission to described mobile LAN inside.Terminal equipment in described mobile LAN sends to the packet of wide area network according to its network communication address, by described local gateway device, according to predefined strategy, and/or to the QOS of the different business on the terminal equipment in mobile LAN, carry out control and management, the Packet Generation that then will allow to send is to described multimodality equipment; Described multimodality equipment sends to wide area network after received packet is carried out protocol conversion.
The below is described in detail the first embodiment for example:
Suppose in mobile LAN, with the multi-mode terminal equipment C that supports P802.21 as radio reception device, it has the WIFI of support wireless access capability and supports the UMTS wireless access capability, and support media independent handover function, when mobile LAN is positioned at available service when zone of WIFI wireless network, multi-mode terminal equipment C is linked into the WIFI wireless network with the WIFI wireless-access mode, is provided to the access function of WIFI wireless network for other network-termination device in the mobile LAN network; Shift out the coverage of WIFI wireless network as the user, but when the available service that still is in the UMTS wireless network is regional, multi-mode terminal equipment C automatic seamless switches to the UMTS wireless access function, be linked into the UMTS wireless network by the UMTS wireless access function, continue as the access function that mobile LAN is provided to the UMTS wireless network.The specific implementation flow process comprises as shown in Figure 3:
When mobile LAN is in the coverage of wireless access network of WIFI medium type, described mobile LAN passes through the WIFI communication mode of the multi-mode terminal equipment C in it as up access way, provides the WIFI communication link for other network-termination device in mobile LAN is linked into wide area network.
Impact due to factors such as the mobile LAN position is moved, environment, described up access capability cause the up access capability of the WIFI communication mode of described multi-mode terminal equipment C to reduce, to such an extent as to can not satisfy the communication need of the terminal equipment in mobile LAN.
Have the communication protocol stack link layer of supporting the WIFI network communicating function in described multi-mode terminal equipment C and find that the up access capability of its WIFI network communication pattern descends, be not enough to satisfy the communication need of the equipment in mobile LAN, just send handover request to the communication protocol stack media-independent switchable layer of multi-mode terminal equipment C, communication protocol stack media-independent switchable layer should ask further to be sent to the communication protocol stack upper strata, and the relevant information that described upper strata obtains according to the POA of the first media WIFI network of current service is selected the target P OA that switches.
After handover decisions is made on the communication protocol stack upper strata of multi-mode terminal equipment C, by communication protocol stack media-independent switchable layer to the communication protocol stack link layer feedback switching request response of sending having of handover request and supporting the WIFI network communicating function.simultaneously, communication protocol stack media-independent switchable layer sends the switching indication to having communication protocol stack link layer and the communication protocol stack media-independent switchable layer in current service POA of supporting the UMTS network communicating function, send the switching indication by the communication protocol stack media-independent switchable layer in current service POA to have communication protocol stack link layer and the communication protocol stack media-independent switchable layer in target P OA of supporting the WIFI network communicating function in current service POA again, and further by the communication protocol stack media-independent switchable layer in target P OA, has a communication protocol stack link layer of supporting the UMTS network communicating function with this indication notice in the target P OA.
Receive between the communication protocol stack link layer of communication protocol stack link layer that having of the multi-mode terminal equipment C that switches indication support the UMTS network communicating function and target P OA, by the link establishment order of UMTS network communication protocol, be established to the double layered communication link of UMTS network.
After the double layered communication link establishment of UMTS network, the communication protocol stack link layer that having in described multi-mode terminal equipment C supported the UMTS network communicating function and the communication protocol stack link layer of described target P OA, order is completed in the foundation of the double layered communication link by described UMTS network, notice arrives communication protocol stack media-independent switchable layer separately, is further notified to the communication protocol stack upper strata that needs this message by communication protocol stack media-independent switchable layer.
Multi-mode terminal equipment C the double layered communication link of completing the UMTS network set up process after, with up incoming communication link, switched to the double layered communication link of newly-established UMTS network by described WIFI network communication link, and remove original WIFI network communication link.
Afterwards, by the double layered communication link of newly-established UMTS network, after multi-mode terminal equipment C will carry out protocol conversion from the packet of wide area network, send to the local gateway device of described mobile LAN inside.Described local gateway device is according to predefined strategy, and/or to the QOS of the different business on the terminal equipment in mobile LAN, it is carried out control and management, then will allow the packet of transmission, according to the network communication address of the terminal equipment of its allocation manager, be distributed to other terminal equipment of described mobile LAN inside.Send to the packet of wide area network for the network communication address of its distribution according to the local gateway device for the terminal equipment in described mobile LAN, the local gateway device is according to predefined strategy, and/or to the QOS of the different business on the terminal equipment in mobile LAN, it is carried out control and management, then will allow the packet of transmission, send to described multi-mode terminal equipment C; Described multi-mode terminal equipment C sends to wide area network after received packet is carried out protocol conversion.
The second embodiment provided by the invention is the method that another kind of mobile LAN is realized business continuance, when mobile LAN moves in the coverage that different media types covers, it realizes the continuity of the ongoing business of equipment in this mobile LAN by having the first access device of supporting the first access network communication function and having the second access device of supporting the second access network communication function.Its flow process comprises as shown in Figure 4:
Step S201, mobile LAN is by having the first access device of supporting the first access network wireless access capability, the first communication link based on the first agreement, be linked into the first access network, according to the mutual information of described the first access network, carry out and business network between business.
When mobile LAN is in the coverage of the first access network, described mobile LAN by the first access device that has the first access network communication function in it support based on the first communication mode of the first agreement as up access way, provide the first communication link based on the first agreement for other terminal equipment in mobile LAN is linked into wide area network; Impact due to factors such as the mobile LAN position is moved, environment, described up access capability cause the up access capability of the first communication mode of described the first access device to reduce, to such an extent as to can not satisfy the communication need of the terminal equipment in mobile LAN.At this moment, described multimodality equipment can be determined the destinations traffic link based on second protocol; And current communication link is switched to described destinations traffic link.Specific as follows:
Step S202, find that the first communication link can not satisfy the communication need of the terminal equipment in mobile LAN, by having the first access device of supporting the first access network wireless access capability in mobile LAN, seek target access network and have the target access device of supporting described target access network wireless access capability; Set up described target access device to the destinations traffic link based on second protocol between described target access network, and current communication link is switched to described destinations traffic link.
In step S202, have the communication protocol stack link layer of supporting the first access network communication function in described the first access device and find that the up access capability of its first communication mode descends, be not enough to satisfy the communication need of the equipment in mobile LAN, just send handover request to the communication protocol stack media-independent switchable layer of described the first access device; After described communication protocol stack media-independent switchable layer received described handover request, by the internal network of mobile LAN, other terminal equipment in mobile LAN sent the access capability query requests; Other terminal equipment in described mobile LAN network is after receiving the access capability query requests, by the scanning to the wireless communication networks in surrounding environment, determine the wireless access capability of oneself, and with oneself wireless access capability information, feed back to the first access device that sends described access capability query requests;
After the communication protocol stack media-independent switchable layer of described the first access device receives the wireless access capability information of other terminal equipment feedback in described mobile LAN network, with described wireless access capability information, and handover request further is sent to the communication protocol stack upper strata of described the first access device; The decision-making that target device is switched according to described wireless access capability information in described communication protocol stack upper strata, namely select to provide the second access device of the wireless access capability that meets the demands as the target access device that switches, simultaneously, communication protocol stack media-independent switchable layer in described the first access device, the communication protocol stack link layer in described the first access device that sends handover request carries out handoff response;
The communication protocol stack media-independent switchable layer of described the first access device sends and switches indication, by the communication protocol stack media-independent switchable layer of described the second access device, described switching indication is given to the communication protocol stack link layer of the second access device; By the communication protocol stack media-independent switchable layer of current service POA, described switching indication is given to the communication protocol stack link layer of described current service POA simultaneously; By the communication protocol stack media-independent switchable layer of target P OA, described switching indication is given to the communication protocol stack link layer of target P OA simultaneously;
Receive the communication protocol stack link layer of the second access device that switches indication and the communication protocol stack link layer of target P OA, by the link establishment order based on second protocol, set up two layers of destinations traffic link based on second protocol, i.e. the second communication link; After described double layered communication link establishment process is completed, the communication protocol stack link layer of the second access device and the communication protocol stack link layer of target P OA, complete order by described double layered communication link establishment, notice arrives communication protocol stack media-independent switchable layer separately; The communication protocol stack media-independent switchable layer of described the second access device is further completed link establishment information exchange and is crossed the communication protocol stack media-independent switchable layer that internal network is notified the first access device, and notifies its communication protocol stack upper strata by the communication protocol stack media-independent switchable layer of the first access device; Described target P OA further completes link establishment information by communication protocol stack media-independent switchable layer and notifies former service POA;
After completing based on the double layered communication link establishment process of second protocol, the first access device is transferred to the second access device with up access function by the first access device.Described the second access device is by newly-established second communication link based on second protocol, be provided to the access function of wide area network for the mobile LAN network, originally be the first access device that mobile LAN is provided to wide area network simultaneously, utilize the link in the first agreement to remove order, remove the first communication link of the first original access network.
Step S203, described the second access device by described second communication link based on second protocol, and carries out data-bag interacting between described the second access network, and carries out business between mobile LAN and described business network according to mutual packet.
in above-mentioned the second embodiment, wireless access function by described the first access device with the first data link setup after, described the first access device, after will carrying out protocol conversion from the packet of wide area network, send to the local gateway device of described mobile LAN inside, described local gateway device is according to predefined strategy, and/or to the QOS of the different business on the terminal equipment in mobile LAN, wide area network is mail to the data of the terminal equipment of mobile LAN inside, carry out control and management, then be the network communication address that is linked into the terminal equipment allocation manager in mobile LAN according to it, with the packet that allows to send, be distributed on the terminal equipment of mobile LAN inside.In addition, the local gateway device of mobile LAN also will be according to predefined strategy, and/or to the QOS of the different business on the terminal equipment in mobile LAN, terminal equipment to mobile LAN inside mails to the data of wide area network according to the network communication address of local gateway devices allocation management, carry out control and management, the packet that allows to send is sent to the first access device, and after by described the first access device, received packet being carried out protocol conversion, sends to wide area network.
Wireless access function by described the second access device, after completing the foundation of the second communication link between mobile LAN and the second access network, the gateway function of mobile LAN can continue to be provided by the local gateway device of original gateway support function, if new support function based on gateway device for mobile LAN provides second access device of access function itself, also the gateway function of mobile LAN network can be converted to by the second new access device provides.Suppose or provide gateway function by original local gateway device, at this moment, described the second access device, after will carrying out protocol conversion from the packet of wide area network, send to the local gateway device of described mobile LAN inside, same described local gateway device is responsible for the network communication address that is linked into the terminal equipment in mobile LAN is distributed, managed on the one hand.On the other hand, the local gateway device of mobile LAN also will be according to predefined strategy, and/or to the QOS of different business on equipment in mobile LAN, the mobile LAN internal unit is managed according to the data message that its network communication address mails to wide area network, the packet that then will allow to send is sent to the second access device, and after by described the second access device, received packet being carried out protocol conversion, send to wide area network.And, described local gateway device is according to predefined strategy, and/or to the QOS of the different business on the terminal equipment in mobile LAN, wide area network is mail to the data of the terminal equipment of mobile LAN inside, carry out control and management, then be the network communication address that is linked into the terminal equipment allocation manager in mobile LAN according to it, the packet with allowing to send is distributed on the terminal equipment of mobile LAN inside.
The below is described in detail the second embodiment for example:
Suppose in the mobile LAN network, at least comprise A, two terminal equipments of B, and connected and composed a LAN by wired or wireless mode between A, two terminal equipments of B and other terminal equipment, wherein terminal equipment A possesses the wireless access function of supporting the first access network WIFI, terminal equipment B supports the wireless access function of the second access network UMTS, when mobile LAN is in available service when zone of WIFI network, mobile LAN is linked into the radio reception device of wide area network as mobile LAN with terminal equipment A.At this moment, the gateway function that can be supported by terminal equipment A also can be made by other equipment with gateway function in mobile LAN the local gateway device of mobile LAN as the local gateway device of mobile LAN.Move out the available service zone of WIFI network as the user, but when the available service that still is in the UMTS network is regional, by the information interaction between terminal equipment A and terminal equipment B, current up access function is seamlessly switched to terminal equipment B by terminal equipment A, by the radio reception device of the terminal equipment B that supports the UMTS wireless communication function as mobile LAN.If this moment terminal equipment B gateway support function, original gateway function can switch to terminal equipment B simultaneously.The specific implementation flow process comprises as shown in Figure 5:
Mobile LAN with the terminal equipment A of wherein support WIFI wireless communication function as the first access device, the agreement of supporting based on the WIFI network further is linked into wide area network, for other terminal equipment in mobile LAN is linked into wide area network, provide the first communication link based on the WIFI network communication protocol.
Impact due to the environmental factors such as movement of mobile LAN position, cause the ability to communicate of the terminal equipment A of support WIFI network communicating function in mobile LAN to reduce, to such an extent as to support the up access capability of the terminal equipment A of WIFI network communicating function, can not satisfy the communication need of equipment in mobile LAN.
support the WIFI communication protocol stack link layer of the terminal equipment A of WIFI network wireless communication function, the discovery ability to communicate descends, when being not enough to satisfy the communication need of mobile LAN, just send handover request to the WIFI communication protocol stack media-independent switchable layer of described terminal equipment A, after WIFI communication protocol stack media-independent switchable layer is received this request, internal network by mobile LAN, other terminal equipment in mobile LAN sends the access capability query requests, be positioned at other terminal equipment of mobile LAN network after receiving the access capability query requests, by the scanning to the wireless communication networks in the surrounding environment of place, determine the own access capability that arrives wide area network by wireless access network, and the access capability information of feedback oneself is to the terminal equipment A that sends the access capability query requests,
After supporting the terminal equipment A access capability information that each equipment feeds back in receiving mobile LAN of WIFI network wireless communication function, by the decision-making that target device is switched on WIFI communication protocol stack upper strata, selection can provide the terminal equipment B of the up access capability that meets the demands as the target access device that switches.After the terminal equipment A of support WIFI network wireless communication function makes the decision-making of switching target device, utilize the WIFI communication protocol stack media-independent switchable layer of described terminal equipment A, to the WIFI protocol stack link layer of described terminal equipment A, and switch indication by the mobile LAN internal network to the WIFI communication protocol stack media-independent handover function layer transmission of terminal equipment B; And simultaneously described switching indication is sent to the current POA that adheres to of terminal equipment A that supports WIFI network wireless communication function.
Support the WIFI communication protocol stack media-independent switchable layer of the terminal equipment A of WIFI network wireless communication function, the UMTS communication protocol stack media-independent switchable layer of terminal equipment B by supporting UMTS network wireless communication function sends and switches the UMTS communication protocol stack link layer that is indicated to terminal equipment B; By the WIFI communication protocol stack media-independent switchable layer of POA1 and the UMTS communication protocol stack media-independent switchable layer in target P OA2, send and switch the link layer that is indicated to the link layer of the WIFI communication protocol stack in POA1 and the UMTS communication protocol stack in POA2 simultaneously.
Receive between the UMTS communication protocol stack link layer of the UMTS communication protocol stack link layer of the terminal equipment B that switches indication and target P OA2, link establishment order by the UMTS communications protocol, foundation is based on the destinations traffic link of two layers of UMTS communications protocol, i.e. second communication link.After described second communication link establishment process is completed, the UMTS communication protocol stack link layer of described terminal equipment B, and the UMTS communication protocol stack link layer of target P OA2, complete order by described second communication link establishment, notice arrives media-independent switchable layer separately; The UMTS communication protocol stack media-independent switchable layer of described terminal equipment B, further information is completed in the second communication link establishment, notify the WIFI communication protocol stack media-independent switchable layer of terminal equipment A by internal network, and notify its WIFI communication protocol stack upper strata by the WIFI communication protocol stack media-independent switchable layer of described terminal equipment A; Described target P OA2, by UMTS communications protocol media-independent switchable layer, the information of further two layers of link establishment being completed is notified former service POA1.
after the second communication link establishment process between terminal equipment B and POA2 is completed, support the terminal equipment A of WIFI network wireless communication function up access function to be transferred on the terminal equipment B that supports UMTS network wireless communication function, by terminal equipment B by newly-established second communication link based on the UMTS agreement, be provided to the access function of wide area network for the mobile LAN network, originally be the terminal equipment A that mobile LAN is provided to the wide area network access capability simultaneously, utilize the link in the WIFI communications protocol to remove order, remove original the first communication link based on the WIFI communications protocol.If the gateway support function of terminal equipment B of access function own is provided for mobile LAN, also the gateway function of mobile LAN can be transferred to described terminal equipment B.
Afterwards, the gateway function by terminal equipment B supports to being linked into the network communication address of the terminal equipment in mobile LAN, carries out allocation manager.
The packet that terminal equipment in described mobile LAN sends according to its network communication address, the gateway function of supporting by terminal equipment B, according to predefined strategy, and/or to the QOS of different business on terminal equipment in mobile LAN, carry out control and management, and carry out information interaction by terminal equipment B based on described second communication link and UMTS network, and carry out business between mobile LAN and media business network according to described interactive information.Equally, the media business network sends to the packet of mobile LAN, and the protocol conversion that will carry described packet by the UMTS network is the UMTS agreement that the second communication link is supported, based on the second communication link bearer, is transferred to described terminal equipment B; After described terminal equipment B receives described packet, be the agreement that described mobile LAN is supported with the UMTS protocol conversion of the described packet of carrying, and according to predefined strategy, and/or to the QOS of different business on other terminal equipment in mobile LAN, carry out control and management, according to the network communication address of other terminal equipment in described mobile LAN, will allow the packet delivery of transmission to the terminal equipment in described mobile LAN.
Above-mentioned to find that a target access device describes as example, when current the first access device that access function is provided is found in mobile LAN, a plurality of available target access device to be arranged, according to the target access device of at least a definite switching in following factor:
The signal strength signal intensity of the wireless network that the terminal equipment of access function receives can be provided in current mobile LAN, the bandwidth that provides the terminal equipment of access function to provide for the mobile LAN network, be current QOS, the rate situation of wireless network of terminal equipment service that access function is provided, and the consumption situation of the terminal equipment of access function to electric weight is provided in mobile LAN.
The 3rd embodiment provided by the invention is a kind of mobile LAN, and its structure comprises as shown in Figure 6: at least one terminal equipment.In wherein said terminal equipment, at least one has following ability: support the first access network access capability and support the second access network access capability, for ease of describing, be referred to as multimodality equipment, it further comprises: communication protocol stack the first medium type link layer entity, communication protocol stack the second medium type link layer entity, communication protocol stack media-independent switchable layer entity and communication protocol stack upper layer entity.Described mobile LAN network can also comprise the local gateway device.
Information interaction relation in described system between each equipment is as follows:
Under normal circumstances, described multimodality equipment by and the first access network between the first communication link, carry out data-bag interacting based on the first agreement and the first access network, and carry out network-termination device described in the mobile LAN network and the internetwork business of media business according to mutual packet.Concrete disposition is as follows:
Described multimodality equipment, the packet that terminal equipment in described mobile LAN network is sent to carries out protocol conversion, the protocol conversion that is about to carry described packet is the first agreement that the first communication link is supported, gives described the first access network with described data packet transmission subsequently; After described the first access network receives described packet, be the agreement that described business network is supported with the protocol conversion of carrying described packet, give described business network with described data packet transmission subsequently.After the packet that described business network sends carries out protocol conversion by the first access network, arrive described multimodality equipment by the first communication link, described multimodality equipment, be the agreement that described mobile LAN is supported with the first protocol conversion of the described packet of carrying, give described mobile LAN with described Packet Generation subsequently.
When the communication capacity of described multimodality device discovery oneself can not satisfy communication requirement, based on second protocol, the second communication link between foundation and the second access network.Concrete disposition is as follows:
When described communication protocol stack the first medium type link layer entity finds that the communication capacity of oneself can not satisfy communication requirement, send handover request, and by being given to described communication protocol stack upper layer entity in described communication protocol stack media-independent switchable layer entity;
Described communication protocol stack upper layer entity, after being used for receiving described handover request, relevant information according to the first access network of current service, the target access network of selecting to switch is the second access network, and informs described communication protocol stack the first medium type link layer entity by described communication protocol stack media-independent switchable layer entity;
Described communication protocol stack media-independent switchable layer entity sends and switches indication to described the second access network and described communication protocol stack the second medium type link layer; Receive the media-independent switchable layer of the described second access network POA devices communicating protocol stack of described switching indication, the link layer to the second access network POA devices communicating protocol stack is indicated in the described switching of transfer;
Receive the link layer of the second access network POA devices communicating protocol stack of described switching indication, communication protocol stack the second medium type link layer with described multimodality equipment, based on the link establishment order of the second access network agreement, set up the destinations traffic link, i.e. the second communication link.
After the second communication link establishment is completed, described multimodality equipment is by described second communication link, carry out data interaction based on second protocol and the second access network, and carry out terminal equipment in described mobile LAN and the business between business network according to described interaction data.Concrete disposition is as follows:
After the second communication link establishment is completed, described multimodality equipment carries out protocol conversion with the packet that the terminal equipment in mobile LAN sends to, the protocol conversion that is about to carry described packet is the second protocol that the second communication link is supported, gives described the second access network with described data packet transmission subsequently; After described the second access network receives described packet, the second protocol that carries described packet is converted to the agreement that described business network is supported, gives described business network with described data packet transmission subsequently.
In addition, mobile LAN, distributes, manages being linked into the network communication address of the network-termination device in mobile LAN by the local gateway device in it.
Terminal equipment in mobile LAN sends to the packet of business network according to its network communication address, by the local gateway device in mobile LAN, according to predefined strategy, and/or to the QOS of different business on terminal equipment in mobile LAN, carry out control and management, determine to allow the packet of transmission, and send the packet of allow transmission to described multimodality equipment;
After packet that multimodality equipment sends over the second access network carries out protocol conversion, before terminal equipment in sending to mobile LAN, by the local gateway device in mobile LAN, according to predefined strategy, and/or to the QOS of different business on network-termination device in mobile LAN, the packet that described multimodality equipment is sent carries out control and management, then according to the network communication address of its management, packet with allowing to send is distributed in corresponding terminal equipment.
The 4th embodiment provided by the invention is a kind of mobile LAN, and its structure comprises as shown in Figure 7: a plurality of network-termination devices; In described network-termination device, at least one has the access capability that is linked into the first access network, for ease of describing, be referred to as the first access device, and at least one has the access capability that is linked into the second access network, for ease of describing, be referred to as the second access device; Described the first access device comprises the first medium type communication protocol stack link layer entity, communication protocol stack media-independent switchable layer entity and communication protocol stack upper layer entity; Described the second access device comprises the second medium type communication protocol stack link layer entity, communication protocol stack media-independent switchable layer entity and communication protocol stack upper layer entity.Described mobile communication system can also comprise the local gateway device.
Information interaction relation between described equipment is as follows:
Under normal circumstances, described the first access device, by and the first access network between the first communication link, carry out data-bag interacting based on the first agreement and the first access network, and carry out business between described terminal equipment and business network according to mutual packet; Concrete disposition is as follows:
Described the first access device carries out protocol conversion with the packet that the terminal equipment in mobile LAN sends to, the protocol conversion that is about to carry described packet is the first agreement that the first communication link is supported, gives described the first access network with described data packet transmission subsequently; After described the first access network receives described packet, be the agreement that described business network is supported with the protocol conversion of carrying described packet, give described business network with described data packet transmission subsequently.After the packet that business network sends carries out protocol conversion by the first access network, after arriving described the first access device by the first communication link, the protocol conversion that described the first access device will carry described packet is the agreement that described mobile LAN is supported, gives described mobile LAN with described Packet Generation subsequently.
When described the first access device finds that the communication capacity of oneself can not satisfy communication requirement, determine that the second access network is target access network, and find second access device that can be linked into described the second access network; Send and switch indication to described the second access network and described the second access device; Described the second access device according to the access of described the first access device indication, based on second protocol, is set up the second communication link between itself and the second access network; Concrete disposition is as follows:
The first medium type communication protocol stack link layer entity of described the first access device, when the communication capacity of finding oneself can not satisfy communication requirement, send handover request, and be given to the communication protocol stack upper layer entity of described the first access device in the communication protocol stack media-independent switchable layer entity by described the first access device;
The communication protocol stack upper layer entity of described the first net access device, after being used for receiving described handover request, relevant information according to the first access network of current service, the objective network of selecting to switch is the second access network, and informs the first medium type communication protocol stack link layer entity of described the first access device by the communication protocol stack media-independent switchable layer entity of described the first access device;
Described the first medium type communication protocol stack link layer entity is by the communication protocol stack media-independent switchable layer entity of described the first access device, carry out capability query, and according to the capability query result that obtains, know second access device that can be linked into the second access network;
By the communication protocol stack media-independent switchable layer of described the first access device, send and switch indication, give described the second access device and the second access network;
The communication protocol stack media-independent switchable layer entity of described the second access device, the switching indication of described the first access device of transfer is to the second medium type communication protocol stack link layer entity of described the second access device;
The second medium type communication protocol stack link layer entity of described the second access device is indicated according to described switching, based on the link establishment order of second protocol, sets up the destinations traffic link between mobile LAN and the second access network, i.e. the second communication link.
After described second communication link establishment is completed, described the second access device is by described second communication link, carry out data-bag interacting based on second protocol and described the second access network, and carry out described terminal equipment and the internetwork business of media business according to mutual packet.Concrete disposition is as follows:
Described the second access device carries out protocol conversion with the packet that other terminal equipment in mobile LAN sends to, the protocol conversion that is about to carry described packet is the second protocol that the second communication link is supported, gives described the second access network with described data packet transmission subsequently; After described the second access network receives described packet, be the agreement that described business network is supported with the protocol conversion of carrying described packet, give described business network with described data packet transmission subsequently.
In addition, mobile LAN, distributes, manages being linked into the network communication address of the terminal equipment in mobile LAN by the local gateway device in it.
Terminal equipment in mobile LAN sends to the packet of business network according to its network communication address, by the local gateway device in mobile LAN, according to predefined strategy, and/or to the QOS of different business on terminal equipment in mobile LAN, carry out control and management, and send the packet of allow transmission to described the second access device;
After the packet that the second access device sends over the second access network carries out protocol conversion, before terminal equipment in sending to mobile LAN, by the local gateway device in mobile LAN, according to predefined strategy, and/or to the QOS of different business on equipment in mobile LAN, carry out control and management, determine to allow the packet that sends, then according to the network communication address of the terminal equipment of managing in it, will allow the packet delivery of transmission to corresponding terminal equipment.
Can be found out by the specific embodiments that the invention described above embodiment provides, the mobile LAN network can provide the support to business continuance in the wireless network of different media types, realize seamless switching.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.

Claims (11)

1. a mobile LAN is realized the method for business continuance, it is characterized in that, comprising:
Mobile LAN is according to current the first communication link based on the first agreement, carry out and business network between business;
When described mobile LAN finds that the communication capacity of oneself can not satisfy communication requirement, by having the multimodality equipment of supporting the first access network and the second access network wireless access capability in mobile LAN, seek target access network;
Has the multimodality equipment of supporting the first access network and the second access network wireless access capability in mobile LAN, according to current be the relevant information that the first access network of described multimodality device service obtains, the target access network of selecting to switch is the second access network;
By the media-independent switchable layer of described multimodality devices communicating protocol stack, send and switch indication to the second medium type link layer of described the second access network and described multimodality devices communicating protocol stack; Receive the media-independent switchable layer of the described second access network access point POA devices communicating protocol stack of described switching indication, the link layer to the second access network access point POA devices communicating protocol stack is indicated in the described switching of transfer;
Receive the link layer of the second access network access point POA devices communicating protocol stack of described switching indication, the second medium type link layer with described multimodality devices communicating protocol stack, based on the link establishment order of the second access network agreement, set up the destinations traffic link between described mobile LAN and described the second access network.
2. the method for claim 1, is characterized in that, mobile LAN is according to current the first communication link based on the first agreement, carry out and business network between the process of business, specifically comprise:
Mobile LAN, by having the multimodality equipment of supporting the first access network wireless access capability, based on the first communication link of the first agreement, be linked into the first current access network, according to the mutual information of described the first access network, carry out and business network between business;
Perhaps,
Mobile LAN, by having the first access device of supporting the first access network wireless access capability, based on the first communication link of the first agreement, be linked into the first current access network, according to the mutual information of described the first access network, carry out and business network between business.
3. method as claimed in claim 1 or 2, it is characterized in that, when current the first access device that access function is provided is found in mobile LAN, a plurality of available target access device to be arranged, according to the target access device of at least a definite switching in following factor:
The signal strength signal intensity of the wireless network that the terminal equipment of access function receives can be provided in current mobile LAN, the bandwidth that provides the terminal equipment of access function to provide for the mobile LAN network, be current service quality QOS, the rate situation of wireless network of terminal equipment service that access function is provided, and the consumption situation of the terminal equipment of access function to electric weight is provided in mobile LAN.
4. the method for claim 1, is characterized in that, when described mobile LAN found that the communication capacity of oneself can not satisfy communication requirement, the method also comprised:
By having the first access device of supporting the first access network wireless access capability in mobile LAN, seek target access network and have the target access device of supporting described target access network wireless access capability;
Have the first access device of supporting the first access network wireless access capability in mobile LAN, according to current be the relevant information that the first access network of described multimodality device service obtains, selecting the objective network of switching is the second access network; And, inquire about by access capability, find to have the second access device of supporting the second access network wireless access capability in mobile LAN;
Described the first access device is by the media-independent switchable layer of its communication protocol stack, send to switch indication, and indicate link layer to described the second access device communication protocol stack by the described switching of media-independent switchable layer transfer of described the second access device communication protocol stack; And the media-independent switchable layer that passes through described the second access network access point POA devices communicating protocol stack, the link layer to described the second access network access point POA devices communicating protocol stack is indicated in the described switching of transfer;
Receive the link layer of described the second access device communication protocol stack of described switching indication and the link layer of the second access network access point POA devices communicating protocol stack, based on the link establishment order of second protocol, set up the destinations traffic link between described mobile LAN and described the second access network.
5. method as described in claim 1 or 4, is characterized in that, after setting up the destinations traffic link between described mobile LAN and described the second access network, closes the first communication link between mobile LAN and described the first access network.
6. method as claimed in claim 4, is characterized in that, also comprises:
Mobile LAN is by described destinations traffic link based on second protocol, and carries out data-bag interacting between described the second access network, and carries out business between mobile LAN and described business network according to mutual packet.
7. method as claimed in claim 6, is characterized in that, by described destinations traffic link based on second protocol, carries out the process with the internetwork business of media business, specifically comprises:
Network communication address to the network equipment that is linked into mobile LAN inside is distributed, is managed; And,
The network equipment of mobile LAN inside according to the packet that described network communication address sends, is carried out control and management, determine and allow the packet that sends; Be the agreement that the destinations traffic link uses with the protocol conversion of carrying the packet of described permission transmission, and give corresponding the second access network by described destinations traffic link transmission; The protocol conversion that described access network will carry the packet of described permission transmission is the agreement that business network is supported, and is transferred to described business network; And,
The packet that business network sends, the protocol conversion that will carry described packet by described the second access network is the agreement that described destinations traffic link uses, and is transferred to described mobile LAN by described communication link; The agreement that described mobile LAN uses the packet that receives, be converted to the agreement that mobile LAN is supported, and described packet is carried out control and management, according to the network communication address of the network equipment of mobile LAN inside, to carrying out distribution processor through the packet after control and management.
8. mobile LAN, comprise at least one terminal equipment, it is characterized in that, in described terminal equipment, at least one has the multimodality equipment of multimodality function, when the communication capacity of described multimodality device discovery oneself can not satisfy communication requirement, based on second protocol, the second communication link between foundation and the second access network; This multimodality equipment further comprises: communication protocol stack the first medium type link layer entity, communication protocol stack the second medium type link layer entity, communication protocol stack media-independent switchable layer entity and communication protocol stack upper layer entity;
When described communication protocol stack the first medium type link layer entity finds that the communication capacity of oneself can not satisfy communication requirement, send handover request, and by being given to described communication protocol stack upper layer entity in described communication protocol stack media-independent switchable layer entity;
Described communication protocol stack upper layer entity, after being used for receiving described handover request, relevant information according to the first access network of current service, the target access network of selecting to switch is the second access network, and informs described communication protocol stack the first medium type link layer entity by described communication protocol stack media-independent switchable layer entity;
Described communication protocol stack media-independent switchable layer entity sends and switches indication to described the second access network and described communication protocol stack the second medium type link layer; Receive the media-independent switchable layer of the described second access network access point POA devices communicating protocol stack of described switching indication, the link layer to the second access network access point POA devices communicating protocol stack is indicated in the described switching of transfer;
Receive the link layer of the second access network access point POA devices communicating protocol stack of described switching indication, communication protocol stack the second medium type link layer with described multimodality equipment, link establishment order based on the second access network agreement, set up the destinations traffic link, i.e. the second communication link;
After the second communication link establishment is completed, described multimodality equipment is by described second communication link, carry out data interaction based on second protocol and the second access network, and carry out terminal equipment in described mobile LAN and the business between business network according to described interaction data.
9. mobile LAN as claimed in claim 8, is characterized in that, also comprises:
The local gateway device is used for the mailing address of the terminal equipment that is linked into mobile LAN inside is distributed, manages; And, described terminal equipment is carried out control and management according to the packet that described mailing address sends, determine to allow the packet of transmission, and send the packet of allow transmission to multimodality function terminal equipment; And the packet that described terminal equipment with multimodality function is sent carries out control and management, and carries out distribution processor according to the Network Communication address of the terminal equipment of described mobile LAN inside.
10. mobile LAN, comprise a plurality of terminal equipments, it is characterized in that, in described terminal equipment, at least one has the first access device of the access capability of supporting the first access network, and at least one has the second access device of the access capability of supporting the second access network, and described the first access device comprises the first medium type communication protocol stack link layer entity, communication protocol stack media-independent switchable layer entity and communication protocol stack upper layer entity; Described the second access device comprises the second medium type communication protocol stack link layer entity, communication protocol stack media-independent switchable layer entity and communication protocol stack upper layer entity;
The first medium type communication protocol stack link layer entity, when can not satisfy communication requirement for the communication capacity of finding oneself, send handover request, and be given to the communication protocol stack upper layer entity of described the first access device in the communication protocol stack media-independent switchable layer entity by described the first access device;
The communication protocol stack upper layer entity, after being used for receiving described handover request, relevant information according to the first access network of current service, the objective network of selecting to switch is the second access network, and informs the first medium type communication protocol stack link layer entity of described the first access device by the communication protocol stack media-independent switchable layer entity of described the first access device;
Described the first medium type communication protocol stack link layer entity is by the communication protocol stack media-independent switchable layer entity of described the first access device, carry out capability query, and according to the capability query result that obtains, know second access device that can be linked into the second access network;
By the communication protocol stack media-independent switchable layer of described the first access device, send and switch indication, give described the second access device and the second access network;
The communication protocol stack media-independent switchable layer entity of described the second access device, the switching indication of described the first access device of transfer is to the second medium type communication protocol stack link layer entity of described the second access device;
The second medium type communication protocol stack link layer entity of described the second access device is indicated according to described switching, based on the link establishment order of second protocol, sets up the destinations traffic link between mobile LAN and the second access network, i.e. the second communication link.
11. mobile LAN as claimed in claim 10 is characterized in that, also comprises:
The local gateway device is used for the network communication address of the terminal equipment of supporting mobile LAN is distributed, managed; And, described terminal equipment is carried out control and management according to the packet that described network communication address sends, determine to allow the packet of transmission, and send the packet of allow transmission to access capability terminal equipment; And the packet that the terminal equipment with access capability is sent carries out control and management, determines to allow the packet of transmission, and according to the network communication address of described terminal equipment, the packet that will allow to send carries out distribution processor.
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