WO2008131622A1

WO2008131622A1 - Method for realizing service continuity in mobile lan

Info

Publication number: WO2008131622A1
Application number: PCT/CN2007/003889
Authority: WO
Inventors: Guiming Shu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-04-30
Filing date: 2007-12-28
Publication date: 2008-11-06
Also published as: CN101299696B; CN101299696A

Abstract

A mobile LAN and a method for realizing service continuity in the mobile LAN, in which, the said mobile LAN processes the service with the service network according to a current first communication link based on a first protocol; when the said mobile LAN detects that its communication capability can't satisfy the communication demand, determines the object communication link based on the second protocol; and hands over the current communication link to the object communication link, therefore it can support the service continuity in the various media types of wireless networks, and realizes service handing over seamlessly.

Description

Mobile local area network and method for realizing business continuity

Technical field

The present invention relates to the field of communications, and more particularly to techniques for implementing mobile local area service continuity. Background technique

With the development of communication technologies, there have been many types of media networks coexisting in a certain service area, and multi-mode terminal devices capable of simultaneously supporting communication with multiple networks are also accompanied by user demands. Due to the differences in different network service areas and service capabilities, users want to use their own terminal devices to seamlessly switch between different types of media networks to ensure continuity of their services. In response to such a demand, the 802.21 protocol proposes an architecture for implementing media independent handover services for multimode terminals. As shown in FIG. 1, it can be seen that it is in the layer 2 (MAC layer) and the third layer of the network entity protocol stack ( A media-independent switching layer is added between the network layers, and an interface between the layer and the upper and lower layers of the protocol stack, the NMS (Network Management System), and the same layer MIH (Media Independent Switching) entity is defined, and the medium-independent switching is performed. Layers provide events, commands, and information services for seamless switching between different types of media networks.

A mobile local area network is a local area network in a mobile environment, which includes various types of devices. These devices form a local area network in a mobile environment in a wireless, wired mode, in a star, ring, or Ad hoc (ad hoc network) structure. Network, for example, in order to carry out multi-party meetings on the moving car, the audio and video equipment of the participants in the car will be formed into an in-vehicle LAN.

When implementing the service, the mobile local area network needs to connect with the wireless communication network of the surrounding area, that is, the wide area network, and further access to its own enterprise network or other mobile local area network. To this end, the mobile local area network includes at least one wireless access device with wireless access capability, and a local area network shutdown device (which may be a physically independent device or is subordinate to a certain wireless device) for controlling and managing internal devices of the mobile local area network. The logical gateway device of the access device). The wireless access device provides a communication link to the wide area network for the device in the mobile local area network, that is, is responsible for protocol conversion between the device in the mobile local area network and the wide area network, and implements data interaction between the two based on the protocol conversion function. ; the local area network is closed On the one hand, the data packet received by the wireless access device from the wide area network is forwarded to the device inside the mobile local area network, and the data packet sent by the internal device of the mobile local area network is sent to the wireless access device.

In order to ensure the continuity of the mobile local area network service during the mobile process, the prior art method is generally: when the mobile local area network is in a service area of some type of wireless network coverage, the mobile local area network passes through the gateway device therein and The wireless access device establishes a communication link with the wireless network covering the service area and further accesses the local area network in its own enterprise network or other mobile environment; when the mobile local area network moves to another wireless network of the same type During the service area, the wireless access device seamlessly switches between different service areas of the wireless network by using a switching mechanism supported by the wireless access device and the wireless network, thereby ensuring continuous service of devices in the mobile local area network. Sex.

It can be seen from the prior art that the existing mobile local area network can provide support for service continuity in different service areas covered by the same type of media network, but it cannot provide when moving between wireless networks of different media types. Support for business continuity. Summary of the invention

Embodiments of the present invention provide a mobile local area network and a method thereof for implementing service continuity, which enable a mobile local area network to provide support for service continuity in a wireless network of different media types, and implement seamless handover.

Embodiments of the present invention are implemented by the following technical solutions:

The embodiment of the invention provides a method for implementing service continuity in a mobile local area network, which includes: a mobile local area network performs a service with a service network according to a first communication link currently based on a first protocol;

When the mobile local area network finds that its own communication capability cannot meet the communication demand, it determines a target communication link based on the second protocol; and switches the current communication link to the target communication link.

The embodiment of the present invention further provides a mobile local area network, including at least one terminal device, where at least one of the terminal devices has a multimode access function, and is configured to perform, by using a current first communication link based on the first protocol. The service between the terminal device and the service network; and, when used to discover their own communication When the capability cannot meet the communication requirement, the target communication link based on the second protocol is determined; and the current communication link is switched to the target communication link.

The embodiment of the present invention further provides another mobile local area network, including multiple terminal devices, at least one of the terminal devices has an access capability supporting the first access network, and at least one has access to support the second access network. ability;

The terminal device having the access capability of the first access network is configured to perform the service between the terminal device and the service network according to the current first communication link based on the first protocol; when discovering the communication capability of the terminal When the communication requirement is not met, determining that the target access network is the second access network; finding the terminal device having the access capability supporting the target access network; and sending a handover indication, requesting to establish a target communication link, And switching the current communication link to the target communication link;

And the terminal device having the access capability of the second access network, configured to establish, according to the handover request, a terminal device that supports access capability of the second access network and the second access network The target communication link switches the current communication link to the target communication link.

It can be seen from the foregoing specific embodiments provided by the embodiments of the present invention that when the mobile local area network finds that its own communication capability cannot meet the communication requirement, the target communication link based on the second protocol is determined; and the current communication link is switched. To the target communication link, the mobile local area network is thus capable of providing support for business continuity in wireless networks of different media types. DRAWINGS

1 is a schematic diagram of an 802.21 protocol architecture provided by the background technology;

Figure 2 is a flow chart of the first embodiment of the present invention;

FIG. 3 is a flowchart of implementing continuity of a mobile local area network service by using a multimode terminal device C according to the first embodiment of the present invention; FIG.

Figure 4 is a flow chart in the second embodiment of the present invention;

FIG. 5 is a flowchart of implementing continuity of a mobile local area network service by using terminal device A and terminal device B according to a second embodiment of the present invention;

Figure 6 is a structural view showing a third embodiment of the present invention; Figure 7 is a structural view of a fourth embodiment of the present invention;

FIG. 8 is a structural diagram of a first terminal device according to an embodiment of the present disclosure;

FIG. 9 is a structural diagram of a second terminal device according to an embodiment of the present invention. detailed description

The first embodiment provided by the present invention is a method for implementing service continuity in a mobile local area network. When a mobile local area network moves in a service area covered by different media types, it has the function of supporting the first access network communication and supporting the same. Two multimode access devices that access network communication functions, such as multimode terminal devices, to achieve continuity of ongoing services within the devices. The process is as shown in FIG. 2, including: Step S101: The mobile local area network accesses the first communication link by using a multi-mode access device that supports the radio access capability of the first access network, and is based on the first communication link of the first protocol. Accessing the network, performing services with the service network according to information exchanged with the first access network.

When the mobile local area network is in the monthly service area of the first access network, the first local area communication mode supported by the access device in the mobile local area network is used as an uplink access mode, and is connected to other terminal devices in the mobile local area network. The first communication link is provided to the WAN. The uplink access capability of the first communication mode of the multimode access device is reduced, so that the uplink access capability cannot satisfy the terminal device in the mobile local area network. Communication needs. At this time, the multimode access device determines a target communication link based on the second protocol; and switches the current communication link to the target communication link. details as follows:

Step S102, detecting that the first communication link cannot meet the communication requirement of the terminal device in the mobile local area network, and searching for a multi-mode access device having the wireless access capability of the first access network and the second access network in the mobile local area network. Target accessing the network; establishing, according to the target access network that is found, a second protocol-based target communication link between the mobile local area network and the target access network, and switching the current communication link to the target Communication link.

In step S102, the first media type link layer of the communication protocol stack supporting the first access network communication function in the multimode access device finds that the uplink access capability of the first communication mode based on the first protocol decreases. Not enough to meet the communication needs of the terminal devices in the mobile LAN, and then issue a handover request to a communication protocol stack media independent switching layer of the multimode access device, the communication protocol stack media independent switching layer further transmitting the request to an upper layer of the communication protocol stack, and the upper layer of the communication protocol stack is based on the first access network of the current service The related information obtained by the POA (Point of Attachments) device performs a handover decision, and selects the P0A of the target access network of the handover, which is assumed to be the second access network;

After the upper layer of the multi-mode access device makes a handover decision, the media-independent switching layer feeds back the handover request response to the first media type link layer of the communication protocol stack that issues the handover request. At the same time, the media protocol-independent switching layer of the communication protocol stack sends a switching indication to the second media type link layer of the communication protocol stack supporting the second access network communication function and the communication protocol stack media independent switching layer in the current service P0A, and then the current The media independent switching layer in the service P0A sends a handover indication to the communication protocol stack link layer in the current serving P0A having the first access network communication function and the communication protocol stack media independent switching layer in the target P0A, and further by the target The communication protocol stack media independent switching layer in P0A notifies the indication to the communication protocol stack link layer in the target P0A that supports the second access network communication function;

The communication protocol stack of the multimode access device that receives the handover indication, the link layer between the second media type and the communication protocol stack of the target P0A, establishes the mobile local area network and the second through the link establishment command of the second protocol a second communication link between the access networks, that is, a target communication link;

After the second communication link is established, the second protocol type link layer of the communication protocol stack and the communication protocol stack link layer of the target P0A in the multimode access device pass the second communication chain based on the second protocol. The establishment of the road completes the command, and notifies the media-independent switching layer of the respective communication protocol stack, and further informs the upper layer of the communication protocol stack that needs the message by the media-independent switching layer of the communication protocol stack;

After completing the establishment process of the second communication link, the multi-mode access device accesses the uplink access communication link, switches from the first communication link to the newly established second communication link, and removes the original A communication link. So far, the handover process of the current first communication link to the target communication link is completed.

Step S103, the multimode access device performs data packet interaction with the target access network by using the target communication link based on the second protocol, and performs mobile local area network according to the interacted data packet. Business between business networks.

When the step S103 is specifically implemented, the network communication address of the terminal device connected to the mobile local area network is generally allocated and managed by the local area network switching device in the mobile local area network; After the wireless access function of the device establishes the communication link, the multimode access device performs protocol conversion on the data packet from the wide area network, and then sends the data to the local area network off device in the mobile local area network, and the local area network off device according to the a set policy, and/or QoS (Quality of Service) for different services on the terminal device in the mobile local area network, controlling and managing the data packet, and allowing data to be transmitted according to the network communication address of the terminal device The package is distributed to the terminal device inside the mobile local area network. a data packet sent by the terminal device in the mobile local area network to the wide area network according to the network communication address thereof, through the local area network switching device, according to a preset policy, and/or QoS for different services on the terminal device in the mobile local area network And performing control management, and then sending the data packet that is allowed to be sent to the multi-mode access device; the multi-mode access device performs protocol conversion on the received data packet, and then sends the data packet to the wide area network.

The first embodiment will be described in detail below by way of example:

Assume that in the mobile local area network, the multimode terminal device C supporting P802.21 is used as the wireless access device, which has the capability of supporting WIFI wireless access and supporting UMTS wireless access, and supports media independent switching function, when the mobile local area network is located in WIFI. When the service area of the wireless network is available, the multimode terminal device C accesses the WIFI wireless network in the WIFI wireless access mode, and provides access to the WIFI wireless network for other network terminal devices in the mobile local area network; when the user moves out of the WIFI When the service area of the wireless network is still in the available service area of the UMTS wireless network, the multimode terminal device C automatically switches seamlessly to the UMTS wireless access function, and accesses the UMTS wireless network through the UMTS wireless access function, continuing to move. The LAN provides access to the UMTS wireless network. The specific implementation process is shown in Figure 3, including:

When the mobile local area network is in the service area of the wireless access network of the WIFI media type, the mobile local area network is connected to other network terminal devices in the mobile local area network by using the WIFI communication mode of the multimode terminal device C therein as an uplink access mode. Enter the WAN to provide WIFI communication links.

The uplink access capability of the WIFI communication mode of the multimode terminal device C is reduced, so that the uplink access capability cannot satisfy the communication of the terminal device in the mobile local area network. demand.

The link layer of the communication protocol stack supporting the WIFI network communication function in the multimode terminal device C finds that the uplink access capability of the WIFI network communication mode is decreased, which is insufficient for the device in the mobile local area network. The communication request sends a handover request to the communication protocol stack media independent switching layer of the multimode terminal device C. The communication protocol stack media independent switching layer further transmits the request to the upper layer of the communication protocol stack, and the upper layer is first according to the current service. The relevant information obtained by the POA of the media WIFI network selects the target POA to be switched.

After the upper layer of the communication protocol stack of the multimode terminal device C makes a handover decision, the communication protocol stack link layer feedback feedback request response is sent to the communication protocol stack supporting the WIFI network communication function by the communication protocol stack media independent switching layer. At the same time, the communication protocol stack media independent switching layer sends a handover indication to the communication protocol stack link layer supporting the UMTS network communication function and the communication protocol stack media independent switching layer in the current serving POA, and then the communication protocol stack in the current serving POA. The media independent switching layer sends a handover indication to the communication protocol stack link layer in the current serving POA having the WIFI network communication function and the communication protocol stack media independent switching layer in the target POA, and further by the communication protocol stack medium in the target POA Regardless of the switching layer, the indication is notified to the communication protocol stack link layer in the target POA that supports the UMTS network communication function.

Between the communication protocol stack link layer of the multimode terminal device C having the handover indication and the communication protocol stack link layer of the target POA, the link establishment command of the UMTS network communication protocol is established to Layer 2 communication link of the UMTS network.

After the Layer 2 communication link to the UMTS network is established, the communication protocol stack link layer of the multimode terminal device C having the UMTS network communication function and the communication protocol stack link layer of the target POA are The establishment completion command of the layer 2 communication link of the UMTS network notifies the media independent switching layer of the respective communication protocol stack, and the media protocol-independent switching layer of the communication protocol stack further notifies the upper layer of the communication protocol stack that needs the message.

After completing the process of establishing the Layer 2 communication link of the UMTS network, the multimode terminal device C switches the uplink access communication link to the Layer 2 communication link of the newly established UMTS network by the WIFI network communication link. And remove the original WIFI network communication link.

Then, through the Layer 2 communication link of the newly established UMTS network, the multimode terminal device C performs protocol conversion on the data packet from the wide area network, and then sends the data packet to the local area network off device inside the mobile local area network. The local area network off device is according to a preset policy, and/or on a terminal device in the mobile local area network The QoS of different services is controlled and managed, and then the data packets that are allowed to be transmitted are distributed to other terminal devices inside the mobile local area network according to the network communication address of the terminal device that is allocated and managed. The data packet sent to the WAN, the LAN gateway device controls and manages the QoS according to a preset policy, and/or different services on the terminal device in the mobile LAN, and then sends the data packet that is allowed to be sent to The multimode terminal device C: the multimode terminal device C performs protocol conversion on the received data packet, and then sends the data packet to the wide area network.

The second embodiment provided by the present invention is another method for implementing service continuity in a mobile local area network. When the mobile local area network moves in a service area covered by different media types, it has the first function of supporting the first access network communication function. The access device and the second access device having the second access network communication function support the continuity of the ongoing service of the device in the mobile local area network. The process is shown in Figure 4, including:

Step S201: The mobile local area network accesses the first access network according to the first communication link of the first protocol by using the first access device that supports the radio access capability of the first access network, according to the first access network. Access the information exchanged by the network to conduct services with the service network.

When the mobile local area network is in the monthly service area of the first access network, the mobile local area network adopts a first communication mode based on the first protocol supported by the first access device having the first access network communication function therein The uplink access mode provides a first communication link based on the first protocol for the other terminal devices in the mobile local area network to access the wide area network; the first access device is caused by the mobile station location, the environment, and the like. The uplink access capability of the first communication mode is reduced, so that the uplink access capability cannot meet the communication requirements of the terminal device in the mobile local area network. At this time, the multimode access device determines a target communication link based on the second protocol; and switches the current communication link to the target communication link. details as follows:

Step S202, it is found that the first communication link cannot meet the communication requirement of the terminal device in the mobile local area network, and the first access device that supports the first access network wireless access capability in the mobile local area network is used to find the target access network and has a target access device supporting the target access network radio access capability; establishing a second protocol-based target communication between the target access device and the target access network The link, and switches the current communication link to the target communication link.

In step S202, the link layer of the communication protocol stack that supports the first access network communication function in the first access device finds that the uplink access capability of the first communication mode decreases, which is insufficient for the device in the mobile local area network. The communication request sends a handover request to the communication protocol stack media-independent switching layer of the first access device; after receiving the handover request, the communication protocol stack media-independent switching layer moves to the mobile network through the internal network of the local area network The other terminal devices in the local area network send an access capability query request; after receiving the access capability query request, the other terminal devices in the mobile local area network determine their own wireless connection by scanning the wireless communication network in the surrounding environment. Incoming capability, and feeding back its own wireless access capability information to the first access device that sends the access capability query request;

After receiving the radio access capability information fed back by other terminal devices in the mobile local area network, the media protocol-independent switching layer of the first access device further transmits the radio access capability information and the handover request. Up to the upper layer of the communication protocol stack of the first access device; the upper layer of the communication protocol stack performs a decision of switching the target device according to the wireless access capability information, that is, selecting a second connection that can provide the wireless access capability that meets the requirement The ingress device is the target access device of the handover, and the communication protocol stack media independent switching layer in the first access device performs the communication protocol stack link layer in the first access device that issues the handover request. Switching response

The media protocol-independent switching layer of the communication protocol stack of the first access device sends a handover indication, and the communication of the handover instruction to the second access device is performed by the media protocol-independent switching layer of the communication protocol stack of the second access device The protocol stack link layer; at the same time, through the current service ΡΟΑ communication protocol stack media independent switching layer, the handover indication is transferred to the current service ΡΟΑ communication protocol stack link layer; at the same time, the target ΡΟΑ communication protocol stack media is irrelevant Switching layer, transferring the switching indication to a link layer of a communication protocol stack of the target node;

a communication protocol stack link layer of the second access device that receives the handover indication and a communication protocol stack link layer of the target device, and a second layer-based second-layer target communication chain is established by using a link establishment command based on the second protocol a second communication link; after the completion of the layer 2 communication link establishment process, the communication protocol stack link layer of the second access device and the target protocol communication protocol stack link layer, through the layer 2 communication a link establishment completion command, notifying the respective communication protocol stack media independent switching layer; the second access The media protocol-independent switching layer of the communication protocol stack of the device further informs the link establishment completion information to the media protocol-independent switching layer of the communication protocol stack of the first access device through the internal network, and the media-independent switching layer of the communication protocol stack of the first access device Notifying the upper layer of the communication protocol stack; the target POA further notifying the link establishment completion information to the original service POA through the media independent switching layer of the communication protocol stack;

After the second protocol-based Layer 2 communication link setup process is completed, the first access device transfers the uplink access function from the first access device to the second access device. The second access device provides a access function to the wide area network for the mobile local area network through the newly established second communication link based on the second protocol, and provides the first access device to the wide area network for the mobile local area network. The link teardown command in the first protocol removes the first communication link of the original first access network.

Step S203: The second access device performs data packet interaction with the second access network by using the second communication link based on the second protocol, and performs mobile area network according to the exchanged data packet. Business with the business network.

In the foregoing second embodiment, after the first data link is established by the radio access function of the first access device, the first access device performs protocol conversion on the data packet from the wide area network, and then sends the data packet to the first access device. a local area network off device in the mobile local area network, the local area network off device is sent to the terminal device of the mobile local area network according to a preset policy, and/or QoS for different services on the terminal device in the mobile local area network The data is subjected to control management, and then the data packets allowed to be transmitted are distributed to the terminal devices inside the mobile local area network according to the network communication address assigned to the terminal device connected to the mobile local area network. In addition, the local area network off device of the mobile local area network will also perform network communication managed by the terminal device according to the local area network off device according to a preset policy and/or QoS for different services on the terminal device in the mobile local area network. The data sent to the WAN is controlled, and the data packet that is allowed to be transmitted is transmitted to the first access device, and the received data packet is protocol-converted by the first access device, and then sent to the WAN.

After the establishment of the second communication link between the mobile local area network and the second access network by the wireless access function of the second access device, the gateway function of the mobile local area network can continue to be closed by the local area network that originally supports the gateway function. The device provides, if the new access device that provides the access function for the mobile local area network itself supports the function of the gateway device, the gateway function of the mobile local area network can also be converted. Provided by a new second access device. It is assumed that the gateway function is still provided by the original local area network off device. At this time, the second access device performs protocol conversion on the data packet from the wide area network, and then sends the data to the local area network off device in the mobile local area network. On the one hand, the device is responsible for allocating and managing the network communication address of the terminal device connected to the mobile local area network; on the other hand, the LAN device of the mobile local area network will also be based on a preset policy, and/or for the device in the mobile local area network. QoS for different services, managing data packets sent by the mobile LAN internal device to the WAN according to the network communication address, and then transmitting the data packet that is allowed to be transmitted to the second access device, and passing the second access device After the received data packet is protocol converted, it is sent to the WAN. And, the local area network off device controls and manages the data sent by the wide area network to the terminal device inside the mobile local area network according to a preset policy, and/or QoS for different services on the terminal device in the mobile local area network, and then according to the It allocates a managed network communication address to a terminal device connected to the mobile local area network, and distributes the data packet that is allowed to be transmitted to the terminal device inside the mobile local area network.

The second embodiment will be described in detail below by way of example:

殳 In the mobile local area network, at least two terminal devices, eight and B, and two terminal devices A and B and other terminal devices are connected by wire or wireless to form a local area network, wherein terminal device A has support When accessing the wireless access function of the network WIFI, the terminal device B supports the wireless access function of the second access network UMTS. When the mobile local area network is in the available service area of the WIFI network, the mobile local area network uses the terminal device A as the mobile local area network. A wireless access device that enters the WAN. At this time, the gateway function supported by the terminal device A can be used as the local area network off device of the mobile local area network, and other devices with gateway functions in the mobile local area network can be used as the local area network off device of the mobile local area network. When the user moves out of the available service area of the WIFI network but is still in the available service area of the UMTS network, the current uplink access function is seamlessly switched by the terminal device A through the information exchange between the terminal device A and the terminal device B. To the terminal device B, the terminal device B supporting the UMTS wireless communication function is used as the wireless access device of the mobile local area network. At this time, if the terminal device B supports the gateway function, the original gateway function can be switched to the terminal device B at the same time. The specific implementation process is as shown in FIG. 5, including: the mobile LAN uses the terminal device A supporting the WIFI wireless communication function as the first access device, and further accesses the WAN based on the protocol supported by the WIFI network, which is in the mobile local area network. Other The terminal device accesses the wide area network and provides a first communication link based on the WIFI network communication protocol.

Due to the influence of environmental factors such as the mobile location of the mobile LAN, the communication capability of the terminal device A supporting the WIFI network communication function in the mobile local area network is reduced, so that the uplink access capability of the terminal device A supporting the WIFI network communication function cannot satisfy the mobile Communication requirements for devices in the LAN.

The WIFI communication protocol stack link layer of the terminal device A supporting the WIFI network wireless communication function finds that the communication capability is degraded, and is insufficient to meet the communication requirement of the mobile local area network, and then issues a handover request to the WIFI communication protocol stack medium of the terminal device A. The irrelevant switching layer, after receiving the request, the WIFI communication protocol stack media layer sends an access capability query request to other terminal devices in the mobile local area network through the internal network of the mobile local area network, and other terminal devices located in the mobile local area network are After receiving the access capability query request, the user can determine the access capability of the wireless access network to the wide area network through the scanning of the wireless communication network in the surrounding environment, and feed back the access capability information to the sending access capability query. Requested terminal device A;

After receiving the access capability information fed back by each device in the mobile local area network, the terminal device A supporting the wireless communication function of the WIFI network performs the decision of switching the target device by the upper layer of the WIFI communication protocol stack, and selects to provide the uplink access capability that meets the requirements. Terminal device B serves as the target access device for handover. After the terminal device A supporting the wireless communication function of the WIFI network makes a decision to switch the target device, using the WIFI communication protocol stack media independent switching layer of the terminal device A, to the WIFI protocol stack link layer of the terminal device A, and And transmitting, by the mobile LAN internal network, a handover indication to the media-independent switching function layer of the WIFI communication protocol stack of the terminal device B; and simultaneously transmitting the handover indication to the POA currently attached by the terminal device A supporting the wireless communication function of the WIFI network.

The WIFI communication protocol stack media-independent switching layer of the terminal device A supporting the wireless communication function of the WIFI network transmits the switching instruction to the UMTS of the terminal device B through the UMTS communication protocol stack media independent switching layer of the terminal device B supporting the wireless communication function of the UMTS network. The communication protocol stack link layer; simultaneously transmits the handover indication to the link layer of the WIFI communication protocol stack in POA1 and the POA2 through the media independent switching layer of the WIFI communication protocol stack of the POA1 and the UMTS communication protocol stack in the target POA2. The link layer of the UMTS communication protocol stack.

The UMTS communication protocol stack link layer of the terminal device B receiving the handover indication and the target POA2 Between the link layers of the UMTS communication protocol stack, a link establishment command of the UMTS communication protocol is established, and a second-layer target communication link based on the UMTS communication protocol is established, that is, the second communication link. After the second communication link establishment process is completed, the UMTS communication protocol stack link layer of the terminal device B and the UMTS communication protocol stack link layer of the target POA2 establish a completion command through the second communication link. Notifying the respective media-independent switching layer; the media-independent switching layer of the UMTS communication protocol stack of the terminal device B further, the second communication link establishment completion information is notified by the internal network to the WIFI communication protocol stack of the terminal device A. Switching layer, and notifying the upper layer of the WIFI communication protocol stack by the media independent switching layer of the WIFI communication protocol stack of the terminal device A; the target POA2, further establishing the completion information of the second layer link through the media independent switching layer of the UMTS communication protocol Notify the original service ΡΟΑ1.

After the second communication link establishment process between the terminal device B and the POA2 is completed, the terminal device A supporting the wireless communication function of the WIFI network transfers the uplink access function to the terminal device B supporting the wireless communication function of the UMTS network, and the terminal device The device B provides the access function to the wide area network for the mobile local area network through the newly established second communication link based on the UMTS protocol, and the terminal device A that provides the access to the wide area network for the mobile local area network, using the WIFI communication protocol The link removal command removes the first communication link based on the WIFI communication protocol. If the terminal device B which provides the access function for the mobile local area network itself supports the gateway function, the gateway function of the mobile local area network can also be transferred to the terminal device 8.

Then, through the gateway function supported by the terminal device B, the network communication address of the terminal device connected to the mobile local area network is allocated and managed.

The data packet sent by the terminal device in the mobile local area network according to the network communication address, the gateway function supported by the terminal device B, according to a preset policy, and/or the QoS for different services on the terminal device in the mobile local area network, Performing control management, and performing information interaction with the UMTS network based on the second communication link by the terminal device B, and performing services between the mobile local area network and the media service network according to the interaction information. Similarly, the data packet sent by the media service network to the mobile local area network converts the protocol carrying the data packet to the UMTS protocol supported by the second communication link through the UMTS network, and transmits the data to the terminal according to the second communication link bearer. After receiving the data packet, the terminal device B converts the UMTS protocol that carries the data packet to the mobile local area network. Protocol, and according to a preset policy, and/or QoS for different services on other terminal devices in the mobile local area network, according to the network communication address of other terminal devices in the mobile local area network, the transmission will be allowed. The data packet is distributed to the terminal device in the mobile local area network.

The foregoing is an example of discovering a target access device. When the first access device that provides the access function finds that there are multiple target access devices in the mobile local area network, according to at least one of the following factors: Determine the target access device for the switch:

The signal strength of the wireless network received by the terminal device that can provide the access function in the current mobile local area network, the bandwidth provided by the terminal device providing the access function for the mobile local area network, and the current QoS of the wireless network service provided by the terminal device providing the access function , the status of tariffs, and the consumption of power by terminal devices that provide access in mobile LANs.

The third embodiment provided by the present invention is a mobile local area network, and its structure is as shown in FIG. 6, and includes: at least one terminal device. At least one of the terminal devices has the following capabilities: supporting the first access network access capability and supporting the second access network access capability. For convenience of description, it is referred to as a multi-mode access device, and further includes: The communication protocol stack first media type link layer entity, communication protocol stack second media type link layer entity, communication protocol stack media independent switching layer entity, and communication protocol stack upper layer entity. The mobile local area network may also include a local area network off device.

The information interaction between each device in the system is as follows:

Normally, the multi-mode access device performs data packet interaction with the first access network based on the first protocol by using the first communication link with the first access network, and performs the data packet according to the interaction A service between the network terminal device and the media service network in the mobile local area network. The specific processing is as follows: the multi-mode access device converts a data packet sent by the terminal device in the mobile local area network into a protocol, and converts the protocol that carries the data packet into the first communication link. a first protocol, the data packet is subsequently transmitted to the first access network; after receiving the data packet, the first access network converts a protocol that carries the data packet into the service network The supported protocol then transmits the data packet to the service network. After the data packet sent by the service network is converted by the first access network, the first communication link reaches the multi-mode access device; and the multi-mode access device carries the data packet. Converting a protocol to a protocol supported by the mobile local area network, The data packet is then sent to the mobile local area network.

When the multi-mode access device finds that its communication capability cannot meet the communication requirement, the second communication link with the second access network is established based on the second protocol. The specific processing situation is as follows:

Transmitting, by the communication protocol stack, the first media type link layer entity, when the communication capability cannot satisfy the communication requirement, sending a handover request, and forwarding the medium to the upper layer entity of the communication protocol stack by using the media protocol-independent switching layer entity of the communication protocol stack;

The upper layer of the communication protocol stack is configured to: after receiving the handover request, select a target access network to be switched as the second access network according to the related information of the first access network currently served, and pass the communication The protocol stack media independent switching layer entity informs the communication protocol stack of the first media type link layer entity;

The communication protocol stack media independent switching layer entity sends a handover indication to the second access network and the second protocol type link layer of the communication protocol stack; and the second access network that receives the handover indication Transmitting, by the media independent switching layer of the POA device communication protocol stack, the switching indication to the link layer of the second access network POA device communication protocol stack;

a link layer of the second access network POA device communication protocol stack receiving the handover indication, a communication protocol stack of the multimode access device, a second media type link layer, and a second access network protocol based A link establishment command establishes a target communication link, that is, a second communication link.

After the second communication link is established, the multi-mode access device performs data interaction with the second access network based on the second protocol, and performs the mobile according to the interaction data. The service between the terminal device and the service network in the local area network. The specific processing situation is as follows:

After the second communication link is established, the multi-mode access device converts the data packet sent by the terminal device in the mobile local area network into a protocol, and converts the protocol that carries the data packet into the second communication link. a second protocol, the data packet is subsequently transmitted to the second access network; after receiving the data packet, the second access network converts a second protocol that carries the data packet into the A protocol supported by the service network, which then transmits the data packet to the service network.

In addition, the mobile local area network allocates and manages the network communication address of the network terminal device connected to the mobile local area network through the local area network off device therein. The data packet sent by the terminal device in the mobile local area network to the service network according to its network communication address, through the local area network off device in the mobile local area network, according to a preset policy, and Z or the QoS of different services on the terminal device in the mobile local area network, Performing control management, determining a data packet that is allowed to be sent, and transmitting the allowed data packet to the multimode access device;

After the multi-mode access device performs protocol conversion on the data packet sent by the second access network, before transmitting to the terminal device in the mobile local area network, the device is turned off by the local area network in the mobile local area network, according to a preset policy, and / or QoS for different services on the network terminal device in the mobile local area network, control and manage the data packets transmitted by the multi-mode access device, and then distribute the data packets that are allowed to be transmitted according to the network communication address managed by the network In the corresponding terminal device.

The fourth embodiment of the present invention is a mobile local area network, and the structure thereof is as shown in FIG. 7, including: a plurality of network terminal devices; at least one of the network terminal devices has access to the first access network. Capability, for convenience of description, is referred to as a first access device, and at least one has access capability to access the second access network, which is referred to as a second access device for convenience of description; An access device includes a first media type communication protocol stack link layer entity, a communication protocol stack media independent switching layer entity, and a communication protocol stack upper layer entity; and the second access device includes a second media type communication protocol stack link layer Entity, communication protocol stack media independent switching layer entity and communication protocol stack upper layer entity. The mobile communication system may also include a local area network off device.

The information interaction relationship between the devices is as follows:

Normally, the first access device performs data packet interaction with the first access network based on the first protocol through a first communication link with the first access network, and according to the interacted data packet. Perform the service between the terminal device and the service network; the specific processing situation is as follows:

Transmitting, by the first access device, a data packet sent by the terminal device in the mobile local area network to a protocol, converting the protocol that carries the data packet into a first protocol supported by the first communication link, and then the data is Transmitting the packet to the first access network; after receiving the data packet, the first access network converts a protocol that carries the data packet into a protocol supported by the service network, and then the data is The packet is transmitted to the service network. After the data packet sent by the service network is forwarded by the first access network, after the first communication link reaches the first access device, the first access device The protocol carrying the data packet is converted to a protocol supported by the mobile local area network, and the data packet is then transmitted to the mobile local area network.

When the first access device finds that its communication capability cannot meet the communication requirement, determining that the second access network is the target access network, and finding the second access that can access the second access network Sending a handover indication to the second access network and the second access device; the second access device, based on the access indication of the first access device, establishing a The second communication link between the second access networks; the specific processing situation is as follows:

The link layer entity of the first media type communication protocol stack of the first access device sends a handover request when it finds that its communication capability cannot meet the communication requirement, and is independent of the communication protocol stack of the first access device. Transmitting a layer entity to the upper layer of the communication protocol stack of the first access device;

The upper layer of the communication protocol stack of the first network access device is configured to: after receiving the handover request, select the target network to be switched as the second access network according to the related information of the first access network currently served, And communicating, by the communication protocol stack media independent switching layer entity of the first access device, the first media type communication protocol stack link layer entity of the first access device;

The first media type communication protocol stack link layer entity performs a capability query by using the media protocol-independent switching layer entity of the communication protocol stack of the first access device, and according to the obtained capability query result, is learned to be able to access the second a second access device that accesses the network;

Transmitting, by the media protocol-independent switching layer of the communication protocol stack of the first access device, the handover indication to the second access device and the second access network;

a communication protocol stack media independent switching layer entity of the second access device, relaying a handover indication of the first access device, and a second media type communication protocol stack link layer entity of the second access device; Establishing, by the second media type communication protocol stack link layer entity of the second access device, a target communication link between the mobile local area network and the second access network, according to the handover indication, based on the link establishment command of the second protocol Road, the second communication link.

After the second communication link is established, the second access device performs data packet interaction with the second access network based on the second protocol by using the second communication link, and according to the interaction Data The packet carries the service between the terminal device and the media service network. The specific processing situation is as follows:

Transmitting, by the second access device, a data packet sent by another terminal device in the mobile local area network to a protocol, converting the protocol that carries the data packet into a second protocol supported by the second communication link, and then Transmitting a data packet to the second access network; after receiving the data packet, the second access network converts a protocol that carries the data packet into a protocol supported by the service network, and then the The data packet is transmitted to the service network.

In addition, the mobile local area network allocates and manages the network communication address of the terminal device connected to the mobile local area network through the local area network off device therein.

The data packet sent by the terminal device in the mobile local area network to the service network according to its network communication address, through the local area network switching device in the mobile local area network, according to a preset policy, and/or QoS for different services on the terminal device in the mobile local area network, Performing control management, and transmitting the allowed data packet to the second access device;

After the second access device performs protocol conversion on the data packet sent by the second access network, before transmitting to the terminal device in the mobile local area network, the device is turned off by the local area network in the mobile local area network, according to a preset policy, and/ Or control and manage the QoS of different services on the devices in the mobile local area network, determine the data packets that are allowed to be sent, and then distribute the data packets that are allowed to be transmitted to the corresponding terminal devices according to the network communication address of the terminal device managed therein.

As shown in FIG. 8, in the structural diagram of the first type of terminal device provided by the embodiment of the present invention, the terminal device has the access capability for supporting the access network, and the terminal device includes:

a service module, configured to perform services according to a current first communication link based on the first protocol and the service network;

a determining module, configured to determine a target access network when it is found that its communication capability cannot meet the communication requirement;

a switching module, configured to find the terminal device that has the access capability of the target access network, send a handover indication, request to establish a target communication link, and switch the current communication link to the target communication link. road.

As shown in FIG. 9, in the structural diagram of the second terminal device provided by the embodiment of the present invention, the terminal device With the access capability to support the access network, the terminal equipment includes:

And a establishing module, configured to establish, according to the received handover request of another terminal device in the mobile local area network, a target communication link between the terminal device having the access capability supporting the access network and the access network;

And a switching module, configured to switch the current communication link to the target communication link.

It can be seen from the specific implementation provided by the foregoing embodiments of the present invention that the mobile local area network can provide support for service continuity in different media types of wireless networks, and achieve seamless handover.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for implementing service continuity in a mobile local area network, the method comprising: the mobile local area network performing a service with the service network according to the first communication link currently based on the first protocol;

When the mobile local area network finds that its communication capability cannot meet the communication demand, it determines a target communication link based on the second protocol, and switches the current communication link to the target communication link.

2. The method according to claim 1, wherein the mobile local area network performs a process of performing a service with the service network according to the first communication link that is currently based on the first protocol, and specifically includes:

The mobile local area network accesses the current first access network according to the first communication link of the first protocol by using the multi-mode access device supporting the radio access capability of the first access network, according to the first connection Enter the information exchanged by the network to conduct business with the service network;

Or,

The mobile local area network accesses the current first access network according to the first communication link of the first protocol by the first access device that supports the radio access capability of the first access network, according to the first access network Enter the information exchanged by the network to conduct business with the service network.

The method of claim 1, wherein the determining the target communication link based on the second protocol and switching the current communication link to the target communication link comprises: a multimode access device supporting a radio access capability of the first access network and the second access network in the local area network, searching for a target access network, establishing the mobile local area network according to the sought target access network Targeting a second protocol-based target communication link between the networks, and switching the current communication link to the target communication link;

Or,

Establishing the target access device and the target access device having the wireless access capability of the target access network by using the first access device in the mobile local area network to support the first access network wireless access capability, and establishing the target Accessing a second communication-based target communication link between the device and the target access network, and switching the current communication link to the target communication link.

The method according to claim 2 or 3, wherein if the first access device that currently provides the access function discovers that there are multiple target access devices available in the mobile local area network, according to at least one of the following factors The target access device that determines the handover:

The signal strength of the wireless network received by the terminal device that can provide the access function in the current mobile local area network, the bandwidth provided by the terminal device providing the access function for the mobile local area network, and the current wireless network service for the terminal device providing the access function The quality of service QoS, tariff status, and the consumption of power by terminal devices providing access functions in the mobile LAN.

The method according to claim 3, wherein the finding a target access network establishes a second protocol-based target communication link between the target access device and the target access network, and The process of switching the current communication link to the target communication link includes:

a multi-mode access device having a radio access capability supporting the first access network and the second access network in the mobile local area network, and selecting according to related information obtained by the first access network currently serving the multi-mode access device The target access network of the handover is a second access network;

Transmitting, by the media independent switching layer of the multimode access device communication protocol stack, a handover indication to the second access network and the second media type link layer of the multimode access device communication protocol stack; Transmitting, by the medium-independent switching layer of the second access network access point POA device communication protocol stack, the handover indication to the link layer of the second access network POA device communication protocol stack;

a link layer of the second access network POA device communication protocol stack receiving the handover indication, and a second media type link layer of the multimode access device communication protocol stack, based on the second access network protocol A link establishment command establishes a target communication link between the mobile local area network and the second access network.

The method according to claim 3, wherein the searching for a target access network and a target access device having the radio access capability of the target access network are based on the found target access network and The target access device, the process of establishing a second protocol-based communication link between the target access device and the target access network, and switching the current communication link to the target communication link, specifically includes:

The first access device in the mobile local area network, which supports the radio access capability of the first access network, selects the switched target according to the related information obtained by the first access network currently serving the multimode access device. The target network is a second access network; and, by accessing the capability query, finding a second access device in the mobile local area network that has the wireless access capability of the second access network;

Transmitting, by the media independent switching layer of the communication protocol stack, the first access device, by using a media independent switching layer of the communication protocol stack, and transmitting, by the media independent switching layer of the second access device communication protocol stack, the switching indication to the second connection a link layer of the device communication protocol stack; and a media independent switching layer of the second access network POA device communication protocol stack, and relaying the switching indication to the chain of the second access network POA device communication protocol stack Road layer

Receiving, by the link layer of the second access device communication protocol stack and the link layer of the second access network POA device communication protocol stack, the link establishment command according to the second protocol A target communication link between the mobile local area network and the second access network.

The method according to claim 5 or 6, wherein after the target communication link between the mobile local area network and the second access network is established, the mobile local area network and the first access network are closed. The first communication link between.

8. The method of any of claims 1, 2, 3, 5 or 6, wherein the method further comprises:

The mobile local area network performs a service with the media service network through the target communication link based on the second protocol.

The method according to claim 8, wherein the process of performing a service with the media service network by using the target communication link based on the second protocol comprises:

Allocating and managing the network communication address of the network device connected to the mobile LAN; and

Performing control management on a data packet sent by the network device inside the mobile local area network according to the network communication address, and determining a data packet that is allowed to be sent; converting a protocol carrying the data packet that is allowed to be transmitted into a target communication link And transmitting, by the target communication link, the corresponding second access network; the access network converts the protocol that carries the data packet that is allowed to be transmitted into a protocol supported by the service network, and transmits the protocol to The service network; and,

a data packet sent by the service network, and the protocol for carrying the data packet by using the second access network Converting to a protocol used by the target communication link and transmitting to the mobile local area network through the communication link; the mobile local area network converts a protocol used by the received data packet into a protocol supported by the mobile local area network And controlling and managing the data packet, and distributing and processing the data packet after the control and management according to the network communication address of the network device inside the mobile local area network.

10. A mobile local area network, comprising at least one terminal device, characterized in that

The terminal device includes at least one terminal device having a multimode access function, configured to perform a service between the terminal device and a service network by using a current first communication link based on the first protocol, and discovering its own When the communication capability cannot meet the communication requirement, the target communication link based on the second protocol is determined; and the current communication link is switched to the target communication link.

The mobile local area network according to claim 10, wherein the mobile local area network further comprises:

a local area network off device, configured to allocate and manage a communication address of a terminal device connected to the mobile local area network, control and manage the data packet sent by the terminal device according to the communication address, and determine a data packet that is allowed to be sent, and Transmitting the data packet that is allowed to be transmitted to the terminal device having the multimode access function, controlling and managing the data packet transmitted by the terminal device having the multimode access function, and according to the terminal device inside the mobile local area network The network communication address is distributed for processing.

The mobile local area network according to claim 10 or 11, wherein the terminal device having the multimode access function comprises:

a communication protocol stack first media type link layer entity, a communication protocol stack second media type link layer entity, a communication protocol stack media independent switching layer entity, and a communication protocol stack upper layer entity;

The first media type link layer entity of the communication protocol stack is configured to: when detecting that the communication capability of the communication medium cannot meet the communication requirement, send a handover request to find the target access network, and transit through the communication protocol stack media independent switching layer entity Giving the upper layer entity of the communication protocol stack;

The upper layer of the communication protocol stack is configured to: after receiving the handover request, select a target access network to be switched according to related information obtained by the current access network, and notify the medium through the communication protocol stack media independent switching layer entity a communication layer stack first media type link layer entity;

The communication protocol stack media independent switching layer entity is configured to send a handover indication to the target access a POA device of the network and a second media type link layer of the communication protocol stack; a communication protocol stack media independent switching layer of the target access network POA device receiving the handover indication, transferring the handover indication to the target connection The communication protocol stack link layer of the network POA device;

a communication protocol stack link layer, configured to: after receiving the handover indication, a second media type link layer that communicates with the terminal device having the multimode access function, and a link establishment command based on the second protocol , establish a target communication link.

13. A mobile local area network, comprising a plurality of terminal devices, wherein:

The terminal device includes at least one terminal device having an access capability supporting the first access network, and at least one terminal device having an access capability supporting the second access network;

The mobile local area network according to claim 13, wherein the mobile local area network further comprises:

a local area network off device, configured to allocate and manage a network communication address supporting a terminal device in the mobile local area network, perform control management on the data packet sent by the terminal device according to the network communication address, determine a data packet that is allowed to be sent, and Transmitting the allowed data packet to the terminal device with access capability, controlling and managing the data packet transmitted by the terminal device with access capability, determining the data packet allowed to be sent, according to the network communication address of the terminal device , will allow the packets to be sent for distribution processing.

The mobile local area network according to claim 13 or 14, wherein the terminal device having the access capability supporting the first access network comprises: a link layer entity of the first media type communication protocol stack, a media independent switching layer entity of the communication protocol stack, and an upper layer entity of the communication protocol stack;

a link layer entity of the first media type communication protocol stack, configured to issue a handover request when it is found that its communication capability cannot meet the communication requirement, and forward the communication to the communication through an unrelated switching layer entity of the communication protocol stack The upper layer entity of the protocol stack performs the capability query through the media independent switching layer entity of the communication protocol stack, and learns the terminal device that can access the second access network according to the obtained capability query result;

The upper layer entity of the communication protocol stack is configured to: after receiving the handover request, select, according to related information obtained by the current access network, the target access network to be switched as the second access network, and pass the communication protocol stack a media independent switching layer entity notifying a link layer entity of the first media type communication protocol stack;

The media independent switching layer entity of the communication protocol stack is configured to send a handover indication to the second access device and the second access network access point POA device.

The mobile local area network according to claim 13 or 14, wherein the terminal device having the access capability supporting the second access network comprises:

a second media type communication protocol stack link layer entity, a communication protocol stack upper layer entity, and a communication protocol stack media independent switching layer entity;

a media independent switching layer entity of the communication protocol stack, configured to: relay a handover indication of the terminal device having access capability to access the first access network, and provide a link to the second media type communication protocol stack Layer entity

The link layer entity of the second media type communication protocol stack is configured to establish a target communication link between the mobile local area network and the second access network according to the link establishment command of the second protocol according to the handover indication.

A terminal device, wherein the terminal device has an access capability for supporting an access network, and includes:

a service module, configured to perform services according to a current first communication link based on the first protocol and the service network; a determining module, configured to determine a target access network when it is found that its communication capability cannot meet the communication requirement;

A terminal device, wherein the terminal device has an access capability for supporting an access network, including: