CN103458370A - Transmission method, device and system for receiving mobile network multicast data - Google Patents

Abstract

Embodiments of the present invention provide a transmission method, device and system for a WLAN terminal to receive mobile network multicast data. The method includes: the WLAN access device identifies whether the message sent by the wireless local area network WLAN terminal is a first multicast group request message, and the first multicast group request message carries a WLAN terminal address and a multicast group address; if the WLAN terminal The sent message is a first multicast group request message, and the WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the first multicast group request message. In this way, the WLAN access device can directly forward the multicast data of the mobile communication network to the WLAN terminal, which not only enables the ordinary WLAN terminal to receive rich multicast data services of the mobile communication network, but also effectively improves the throughput of the multicast data of the mobile communication network. Receive efficiency, and avoid the waste of mobile communication network air interface resources.

Description

Transmission method, device and system for receiving mobile network multicast data

technical field

Embodiments of the present invention relate to the field of communication technologies, and more specifically, relate to a transmission method, device and system for a WLAN (Wireless Local Area Networks, wireless local area network) terminal to receive mobile network multicast data.

Background technique

With the development of network technology, various types of wireless access technologies continue to emerge, such as WiFi (Wireless Fidelity, Wireless Fidelity) and LTE (Long Term Evolution, Long Term Evolution) technologies.

As a WLAN technology, WiFi technology has been widely used in fixed scene areas such as individuals, families, enterprises, airports, hotels, entertainment and leisure public places, conference exhibition halls, etc. Supporting the WiFi function has become a standard configuration for many user terminals. With the popularization of WiFi technology, telecom operators have begun to deploy outdoor APs (Access Points) on a large scale to form a separate WLAN network and provide users with a cost-effective Internet experience. However, WLAN network backhaul requires large resources and costs high.

On the other hand, the LTE technology has become a standard for the evolution of mobile communication networks. In addition to providing high-bandwidth and low-latency point-to-point unicast data broadband connection services, the LTE network can also provide point-to-multipoint eMBMS (Enhanced Multimedia BroadcastMulticast Service) that supports higher rates and better service quality. multicast service). Through the eMBMS service, rich multimedia information such as standard definition/high definition TV (television, television) video service, mobile phone news, weather forecast, sports events, and government emergency broadcast information can be pushed to meet the comprehensive information broadcast of various customer groups such as users, enterprises, and governments. business needs. However, at present, due to the lack of LTE terminals and the high price of LTE terminals, the development of LTE networks and services is greatly affected.

In the prior art, after the WiFi terminal accesses through WLAN authentication, for the centralized forwarding mode, all data streams are transmitted through the thin AP (the thin AP refers to the authentication authentication and device wireless channel management managed by the upper-layer device AC) to the AC. (Access Controller, wireless access controller) between the CAPWAP (Control and Provisioning of Wireless Access Points, wireless access point control protocol) tunnel, and traverse the entire LTE network. If a WiFi terminal wants to receive LTE eMBMS multicast data, it not only has to go far away to receive multicast data on the BRAS, but also one multicast data will be transmitted in multiple copies on the LTE network, which will cause a waste of network transmission resources, especially the LTE air interface. Waste of resources. In addition, passing through the CAPWAP tunnel will reduce the transmission efficiency of the multicast data stream.

Contents of the invention

Embodiments of the present invention provide a transmission method and equipment for a WLAN terminal to receive mobile network multicast data, which can effectively improve the efficiency of receiving mobile network multicast data and avoid waste of mobile communication network air interface resources.

In order to solve the above problems, embodiments of the present invention provide the following technical solutions:

In a first aspect, an embodiment of the present invention provides a transmission method for a WLAN terminal to receive mobile network multicast data, including: the WLAN access device identifies whether the message sent by the wireless local area network WLAN terminal is a first multicast group request message, the The first multicast group request message carries the WLAN terminal address and the multicast group address; if the message sent by the WLAN terminal is the first multicast group request message, the WLAN access device The multicast group address carried in the message updates the first multicast forwarding table; the WLAN access device forwards the mobile network multicast data to the WLAN terminal according to the first multicast forwarding table.

In a second aspect, an embodiment of the present invention provides a transmission method for a WLAN terminal to receive mobile network multicast data, including: a client device receives a second multicast group request message sent by a wireless local area network WLAN access device, and the second The multicast group request message carries the WLAN access device address and the multicast group address; the second multicast forwarding table is updated according to the WLAN access device address and the multicast group address carried in the second multicast group request message, The second multicast forwarding table is used for the client device to forward mobile network multicast data to the WLAN access device; the client device forwards the mobile network multicast data according to the second multicast forwarding table Give the WLAN access device.

In a third aspect, an embodiment of the present invention provides a WLAN access device, including: an identification unit, configured to identify whether a message sent by a wireless local area network WLAN terminal is a first multicast group request message, and the first multicast group request message The message carries the address of the WLAN terminal and the address of the multicast group; the update unit is configured to: if the message sent by the WLAN terminal identified by the identification unit is a first multicast group request message, then according to the first multicast group request message The multicast group address carried in the update the first multicast forwarding table; the forwarding unit is configured to forward the mobile network multicast data to the WLAN terminal according to the first multicast forwarding table.

In a fourth aspect, an embodiment of the present invention provides a client device, including: a receiving unit, configured to receive a second multicast group request message sent by a wireless local area network WLAN access device, and send the second multicast group request message to an update unit A broadcast group request message, the second multicast group request message carries a WLAN access device address and a multicast group address; an updating unit is configured to receive the second multicast group request message sent by the receiving unit, and according to The WLAN access device address and the multicast group address carried in the second multicast group request message update the second multicast forwarding table, and the second multicast forwarding table is used to forward to the WLAN access device Mobile network multicast data; a forwarding unit, configured to forward the mobile network multicast data to the WLAN access device according to the second multicast forwarding table.

In a fourth aspect, an embodiment of the present invention provides a system for a WLAN terminal to receive mobile network multicast data, the system includes a WLAN access device and a client device, wherein:

The WLAN access device is used to: identify whether the message sent by the wireless local area network WLAN terminal is a first multicast group request message, and the first multicast group request message carries a WLAN terminal address and a multicast group address; if the WLAN The message sent by the terminal is the first multicast group request message, then update the first multicast forwarding table according to the multicast group address carried in the first multicast group request message, and send the first multicast group request message to the client device Two multicast group request messages, the second multicast group request message carrying the WLAN access device address and the multicast group address; forwarding mobile network multicast data to the WLAN terminal according to the first multicast forwarding table;

The client device is configured to: receive a second multicast group request message sent by the WLAN access device; The broadcast forwarding table is updated, and the second multicast forwarding table is used for the client device to forward mobile network multicast data to the WLAN access device.

In the embodiment of the present invention, the access device identifies the first multicast group request message sent by the WLAN terminal, and uses the multicast group address carried in the first multicast group request message to update the first multicast forwarding table. In this way, the WLAN access device can directly forward the multicast data of the mobile communication network to the WLAN terminal, which not only enables ordinary WLAN terminals to receive rich multicast data services of the mobile communication network, but also effectively improves the throughput of multicast data in the mobile communication network. Receive efficiency, and avoid the waste of mobile communication network air interface resources.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of an LTE-WiFi network architecture applicable to an embodiment of the present invention.

Fig. 2 is a flowchart of a transmission method for a WLAN terminal to receive mobile network multicast data according to an embodiment of the present invention.

Fig. 3 is a schematic flowchart of a process of a WLAN terminal receiving mobile network multicast data transmission method according to an embodiment of the present invention.

Fig. 4 is a flowchart of a transmission method for a WLAN terminal to receive mobile network multicast data according to another embodiment of the present invention.

FIG. 5 is a schematic flowchart of a process of a transmission method for receiving mobile network multicast data by a WLAN terminal applicable to the network architecture of FIG. 1 according to another embodiment of the present invention.

FIG. 6 is a schematic flowchart of a process of a method for updating a multicast group address filtering condition applicable to the network architecture of FIG. 1 according to another embodiment of the present invention.

Fig. 7 is a block diagram of a WLAN access device according to an embodiment of the present invention.

FIG. 8 is a block diagram of a client device according to another embodiment of the present invention.

Fig. 9 is a block diagram of a system for a WLAN terminal to receive mobile network multicast data according to another embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The technical scheme of the present invention can be applied to various mobile communication systems, such as: Global System for Mobile Communications (GSM, Global System of Mobile communication), Code Division Multiple Access (CDMA, Code Division Multiple Access) system, broadband code division multiple access (WCDMA, Wideband Code Division Multiple Access Wireless), General Packet Radio Service (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution), etc.

WLAN terminals can be WiFi terminals, or WiMAX (Worldwide Interoperability for Microwave Access) or WAPI (WLAN Authentication and Privacy Infrastructure) terminals.

In order to help those skilled in the art understand the embodiments of the present invention, an LTE network will be used as an example for a mobile network, and a WiFi network will be used as an example for a WLAN network. It should be noted that the embodiments of the present invention are not limited thereto, and may be other mobile communication systems than the LTE system or other WLAN terminals than the WiFi terminal.

FIG. 1 is a schematic diagram of an LTE-WiFi network architecture applicable to an embodiment of the present invention.

It should be understood that in this embodiment of the present invention, although two WLAN terminals WiFi terminal 101 and WiFi terminal 102 are described in FIG. Device wireless channel management is managed by the upper device AC), two client devices CPE 105 (Customer Premise Equipment, client device) and CPE 106, a base station 107, etc., but only for the convenience of description. The number of each network device in FIG. 1 may be one or more, which is not limited in this embodiment of the present invention.

In the LTE-WiFi network architecture shown in Figure 1, BRAS 117 (Broadband Remote Access Server, Broadband Remote Access Server) is connected to AAA (Authentication Authorization Accounting, Authentication Authorization Accounting) server 118, MME 111 (Mobility Management Entity, mobility management Entity) is used to implement the control plane function, HSS 112 (Home Subscriber Server, home user server) is used to manage the user subscription data of IMS (IP Multimedia Subsystem, IP Multimedia Subsystem), S/PGW 113 (Serving/Packet Data Network Gateway, Service Gateway/Packet Data Network Gateway) and MBMS GW (Multimedia BroadcastMulticast Service Gateway, Multimedia Broadcast Multicast Service Gateway) 114 are used to provide network compatibility functions such as protocol conversion, routing selection, and data exchange. BMSC 116 (Broadcast Multicast Service Controller, multicast Broadcast controller) is used to manage MBS session information, control the transmission of MBS service content, etc.

In the prior art, after the WiFi terminal 101/WiFi terminal 102 accesses through WLAN authentication, for the centralized forwarding mode, all data streams are transmitted through the thin AP 103/thin AP 104 to the AC 115 (Access Controller, wireless access control CAPWAP (Control and Provisioning of Wireless Access Points, wireless access point control protocol) tunnel 108/CAPWAP tunnel 109 between devices), and traverse the entire LTE network. For example, the WiFi terminal 101 sends a multicast request, reports it to the AC 115 through the CAPWAP tunnel 108, and then reports it to the BRS 117 by the AC 115, and joins the corresponding multicast group, and the multicast data is transmitted to the WiFi terminal 101 through the CAPWAP tunnel 108.

Therefore, in the entire network, if a WiFi terminal wants to receive LTE eMBMS (EnhancedMultimedia Broadcast Multicast Service, Enhanced Multimedia Broadcast Multicast Service) multicast data, it not only needs to go far away to receive multicast data on the BRAS, but also a copy of the multicast data will be Multiple copies are transmitted on the LTE network, which will cause waste of network transmission resources, especially the waste of LTE air interface resources. In addition, passing through the CAPWAP tunnel will reduce the transmission efficiency of the multicast data stream.

In order to solve the above problems, embodiments of the present invention provide a transmission method and device for WLAN terminals to receive mobile network multicast data, which can effectively improve the efficiency of receiving mobile network multicast data and avoid waste of mobile communication network air interface resources.

Fig. 2 is a flowchart of a transmission method for a WLAN terminal to receive mobile network multicast data according to an embodiment of the present invention. The method in Fig. 2 is executed by the WLAN access device.

Taking LTE-WiFi as an example, the access device can be an integrated form of WiFi thin AP and LTE CPE, or a form of base station integrated thin AP, or it can also be a form of WiFi thin AP.

201. A WLAN access device identifies whether a message sent by a WLAN terminal on a wireless local area network is a first multicast group request message, where the first multicast group request message carries a WLAN terminal address and a multicast group address.

Optionally, the WLAN access device may be configured with a parameter, and the parameter is used to indicate whether the WLAN access device activates the multicast group request message identification function. For example, under the LTE-WiFi network architecture, when a WLAN access device receives a message sent by a WLAN terminal, it first determines whether there are configuration parameters. Multicast group request message. This parameter can be configured by the administrator, including local configuration or remote configuration.

Optionally, the first multicast group request message can be an IGMP report (Internet GroupManagement Protocol report, Internet Group Management Protocol report), including two subtype messages of joining a multicast group and leaving a multicast group, or GMRP (GARP (Generic Attribute RegistrationProtocol, general attribute registration protocol) Multicast Registration Protocol, GARP multicast registration protocol) message, or other types of messages. For example: For some WiFi terminals that do not support the IGMP protocol, these terminals cannot initiate IGMP join requests to join the multicast group by themselves, but will send data packets with the destination IP address as the multicast group address. Whether the destination IP address of the data message is a multicast group address determines whether the WiFi terminal wishes to join the multicast group; and then sends corresponding IGMP join requests instead of these WiFi terminals. In this way, WiFi terminals that do not support the IGMP protocol can also join the multicast group.

The WLAN terminal address may be an IP (Internet Protocol, Internet Protocol) address, a MAC (Media Access Control, Media Access Control) address or other types of addresses of the WLAN terminal. The multicast group address may be the IP address, MAC address or other types of addresses of the server sending the multicast data. The present invention is not limited thereto. For example, a WLAN terminal needs to join a certain multicast group, and sends a first multicast group request message. Specifically, the first multicast group request message is an IGMP report to join, carrying WLAN terminal address 188.0.1.123 and multicast group address 232.0. 1.99.

202. If the message sent by the WLAN terminal is the first multicast group request message, the WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the first multicast group request message;

Optionally, in an implementation manner, a mapping relationship between the multicast group address carried in the first multicast group request message and the WLAN terminal address may be established, and the first multicast forwarding table is updated using the mapping relationship. Specifically, if the first multicast group request message indicates joining a multicast group, register the mapping relationship between the corresponding WLAN terminal address and the multicast group address in the first multicast forwarding table. Or, if the first multicast group request message indicates leaving the multicast group, delete the corresponding mapping relationship between the WLAN terminal address and the multicast group address in the first multicast forwarding table.

In another implementation manner, considering the broadcast attribute of the WLAN access device, the first multicast forwarding table may omit the field of the WLAN terminal address. If the first multicast group request message indicates joining a multicast group, and the multicast group address carried in the first multicast group request message does not belong to the first multicast forwarding table, register the first multicast forwarding table in the first multicast forwarding table. The multicast group address carried in the multicast group request message. Or, if the first multicast group request message indicates leaving the multicast group, then send the first query message to all WLAN terminals, so that all WLAN terminals report the corresponding multicast group request message according to the first query message, when all terminals The corresponding multicast group request message reported indicates leaving the multicast group, or no WLAN terminal reports the corresponding multicast group request message indicating joining the multicast group, delete the first multicast group request message in the first multicast forwarding table The multicast group address carried in the .

203. The WLAN access device forwards the mobile network multicast data to the WLAN terminal according to the first multicast forwarding table;

Specifically, the WLAN access device receives mobile network multicast data; if the multicast group address of the multicast data belongs to the first multicast forwarding table, the WLAN access device sends the multicast data to forwarded to the WLAN terminal.

In addition, optionally, before the WLAN access device in this embodiment of the present invention identifies whether the message sent by the WLAN terminal is the first multicast group request message, the WLAN access device may first send a query message to the terminal, so that the WLAN The terminal reports a corresponding multicast group request message according to the query message. For example, periodically send a general query message and/or a specific group query message to the terminal. If the WLAN terminal needs to receive corresponding multicast data, the WLAN terminal will respond and report the corresponding multicast group to the access point. request message.

In the embodiment of the present invention, the WLAN access device identifies the first multicast group request message sent by the WLAN terminal, and uses the multicast group address carried in the first multicast group request message to update the first multicast forwarding table. In this way, the WLAN access device can directly forward the multicast data of the mobile communication network to the WLAN terminal, which not only enables ordinary WLAN terminals to receive rich multicast data services of the mobile communication network, but also effectively improves the throughput of multicast data in the mobile communication network. Receive efficiency, and avoid the waste of mobile communication network air interface resources. WLAN terminals directly receive mobile network multicast data, which improves the service experience of WLAN user terminals and the utilization rate of mobile networks.

The embodiment of the present invention also provides another transmission method for a WLAN terminal to receive mobile network multicast data, that is, the WLAN access device in step 202 of any of the above embodiments pairs Before the first multicast forwarding table is updated, the first multicast group request message may be filtered according to the multicast group address filter condition. For example, if the multicast group address carried in the first multicast group request message is different from the multicast group address of any mobile network multicast data in the multicast group address filtering table, then the first multicast group request Messages are filtered. For another example, the multicast group address in the multicast group address filtering table does not belong to the multicast group address of the mobile network multicast data, if the multicast group address carried in the first multicast group request message belongs to the multicast group address filtering table , filter the first multicast group request message. In this way, the forwarding efficiency of multicast data can be improved. In addition, the multicast group address filtering table can be configured by an administrator, including local configuration or remote configuration, which is not limited in this embodiment of the present invention.

Optionally, in this embodiment of the present invention, the filter condition of the multicast group address can be updated. For example, the access device receives LTE eMBMS multicast data, and automatically learns to identify whether the multicast group address of the LTE eMBMS multicast data belongs to the multicast group address filtering table, so as to establish and maintain the filtering process for the first multicast group request message filter criteria for .

A non-limiting example of the method for transmitting multicast data according to the embodiment of the present invention will be described in more detail below in conjunction with specific embodiments. It should be noted that these examples are only intended to help those skilled in the art better understand the embodiments of the present invention, rather than limiting the scope of the present invention.

Fig. 3 is a schematic flowchart of a process of a WLAN terminal receiving mobile network multicast data transmission method according to an embodiment of the present invention.

In Figure 3, the WLAN terminal takes a WiFi terminal as an example, and the access device can be a form in which a WiFi thin AP is integrated with an LTE CPE, or a form in which a base station integrates a WiFi thin AP. It should be noted that in this embodiment of the present invention, LTE-WiFi is taken as an example for description, but this embodiment of the present invention is not limited thereto.

301. The WiFi terminal sends a certain message to the access device.

For example, the message sent by the WiFi terminal to the access device may be a multicast group request message or other messages.

302. The access device identifies the first multicast group request message.

For example, the first multicast group request message can be an IGMP report, including two subtype messages of joining a multicast group and leaving a multicast group, or a GMRP message, or other types of messages. The first multicast group request message carries the multicast group address and the WiFi terminal address.

For example, the access device identifies the type of the message sent by the WiFi terminal, and if the type of the message does not belong to the first multicast group request message, the data message is encapsulated in CAPWAP as a normal data message and forwarded through the CAPWAP tunnel. If the type of the message belongs to the first multicast group request message, the first multicast group request message may also be filtered, or the first multicast forwarding table may be directly updated.

303. The access device performs filtering processing on the first multicast group request message. The filtering processing of the multicast group address can improve the forwarding efficiency of the multicast data.

For example, pre-set the multicast group address filtering table. For example, the multicast group address filtering table can be configured by the administrator, including local configuration or remote configuration. In addition, the multicast group address filtering table can be updated through automatic learning by the device. For example, the multicast group address information carried by the mobile network multicast data (for example, the multicast data carried by LTEeMBMS) can be analyzed, and the multicast group address filtering table can be updated by using the multicast group address information.

Specifically, the multicast group addresses in the multicast group address filtering table may be allowed multicast group addresses. In this case, if the multicast group address carried in the first multicast group request message is not the same as the multicast group address of the multicast data carried by any LTE eMBMS in the multicast group address filtering table, the The first multicast group request message is encapsulated by CAPWAP as an ordinary data packet and forwarded through the CAPWAP tunnel, or the first multicast group request message may be directly discarded.

Alternatively, the multicast group addresses in the multicast group address filtering table may be forbidden multicast group addresses. In this case, if the multicast group address carried in the first multicast group request message belongs to the multicast group address filtering table, then the first multicast group request message can be used as a normal data packet for CAPWAP encapsulation and passed through the CAPWAP The tunnel forwards, or the first multicast group request message may be directly discarded.

304. The access device updates the first multicast forwarding table.

For example, a mapping relationship between the multicast group address carried in the first multicast group request message and the WiFi terminal address is established, and the first multicast forwarding table is updated using the mapping relationship. Specifically, if the first multicast group request message represents joining a multicast group, for example, an IGMP report joins, or a GMRP Join message, then register the mapping of the corresponding WiFi terminal address and the multicast group address in the first multicast forwarding table relation. Or, if the first multicast group request message indicates leaving the multicast group, for example, the IGMP report leaves, or the GMRP Leave message, then delete the mapping relationship between the corresponding WiFi terminal address and the multicast group address in the first multicast forwarding table .

For another example, considering the broadcast attribute of the WiFi access device, the first multicast forwarding table may be updated only according to the multicast group address carried in the first multicast group request message. At this time, there is no need to consider the WiFi terminal address.

Specifically, if the first multicast group request message indicates joining a multicast group, for example, an IGMP report joins, or a GMRP Join message, and the multicast group address carried in the first multicast group request message does not belong to the first multicast group register the multicast group address carried in the first multicast group request message in the first multicast forwarding table. Or, if the first multicast group request message indicates leaving the multicast group, then send the first query message to all WiFi terminals, so that all WiFi terminals report the corresponding multicast group request message according to the first query message, when all terminals The corresponding multicast group request message reported means to leave the multicast group. For example, IGMP report leaves, or GMRP Leave message, or no WiFi terminal reports the corresponding multicast group request message to indicate joining the multicast group. The multicast group address carried in the first multicast group request message is deleted from the forwarding table.

In addition, in order to maintain the first multicast forwarding table, the IGMP query function can be deployed on the access device to periodically send a query message to the WiFi terminal, and the WiFi terminal responds to the query message and reports the corresponding multicast group The request message, for example, when the WiFi terminal needs to receive corresponding multicast data, the WiFi terminal will respond by reporting a first multicast group request message to indicate joining the multicast group. The foregoing query message may also be aperiodic, for example, the query message is triggered as needed, which is not limited in this embodiment of the present invention.

305. The access device receives LTE eMBMS multicast data.

The access device will analyze the multicast group address of the LTE eMBMS multicast data, and compare it with the multicast group address in the first multicast forwarding table, and perform forwarding processing of the multicast data according to the result of the comparison.

306. The access device sends the multicast data to the WiFi terminal.

For example, if the multicast group address of the received LTE eMBMS multicast data belongs to the first multicast forwarding table, then the multicast data is sent to the WiFi terminal. There are many ways to send multicast data to WiFi terminals: one is to send multicast to all WiFi terminals on the WiFi port; the other is to send unicast to WiFi terminals on the WiFi port; it can also be a combination of the two methods : Some WiFi terminals send in multicast mode, and other terminals send in unicast mode. During the specific implementation, the system processing performance, spectrum utilization rate, user service experience guarantee and other aspects can be comprehensively considered, and an appropriate transmission method and transmission strategy can be selected.

On the other hand, if the multicast group address of the LTE eMBMS multicast data obtained in step 205 is not in the first multicast forwarding table, the access device may discard the LTE eMBMS multicast data.

In the embodiment of the present invention, the access point identifies the first multicast group request message sent by the WiFi terminal, and uses the multicast group address carried in the first multicast group request message to update the first multicast forwarding table. In this way, the access device can forward the mobile network multicast data, so that the multicast data transmission is not limited to the CAPWAP tunnel, and the transmission efficiency can be effectively improved.

In addition, the access point in the embodiment of the present invention can receive LTE eMBMS multicast data, and if the multicast group address of the LTE eMBMS multicast data belongs to the first multicast forwarding table, the multicast data is sent to the WiFi terminal. In this way, WiFi terminals can also receive LTE eMBMS multicast data, which improves the service experience of WiFi user terminals and the utilization rate of LTE networks.

When the WLAN access device and the client device are separate devices, the WLAN access device, such as a WiFi AP, performs the same or corresponding steps in the methods in Figure 2 and Figure 3, and in order to avoid repetition, details are not repeated here.

Fig. 4 is a flowchart of a transmission method for a WLAN terminal to receive mobile network multicast data according to an embodiment of the present invention. The method in FIG. 4 can be executed by a client device. An example of a client device is an LTE CPE.

401. A client device receives a second multicast group request message sent by a WLAN access device on a wireless local area network, where the second multicast group request message carries an address of the WLAN access device and a multicast group address.

402. Update the second multicast forwarding table according to the WLAN access device address and the multicast group address carried in the second multicast group request message, and the second multicast forwarding table is used for forwarding the client device to the WLAN access device Mobile network multicast data;

403. The client device forwards the mobile network multicast data to the WLAN access device according to the second multicast forwarding table.

Optionally, step 403 may specifically be implemented as receiving mobile network multicast data, and if the multicast group address of the mobile network multicast data belongs to the second multicast forwarding table, then sending the multicast data to the WLAN access device .

Optionally, the client device in this embodiment of the present invention may periodically send a query message to the WLAN access device, and the WLAN access device forwards the query message to the WLAN terminal, so that the WLAN terminal reports the corresponding query message according to the query message. The multicast group request message. Or, the WLAN access device responds according to the multicast group address information in the first multicast forwarding table, so that the client device can maintain the second multicast forwarding table.

It should be noted that the client device can forward the received mobile network multicast data to the WLAN access device, so that the WLAN access device can use the multicast group address information of the mobile network multicast data to update the multicast Group address filter criteria. The method for updating the filter condition of the multicast group address in the embodiment of the present invention will be described in detail below in conjunction with specific examples.

In the embodiment of the present invention, the client device receives the mobile network multicast data, and if the multicast group address of the mobile network multicast data belongs to the second multicast forwarding table, then sends the multicast data to the WLAN access device. Or, forward the mobile network multicast data to the WLAN access device. In this way, the WLAN access device can forward the mobile network multicast data to the WLAN terminal, which can effectively improve the reception efficiency of the mobile communication network multicast data by the WLAN terminal.

A non-limiting example of the method for transmitting multicast data according to the embodiment of the present invention will be described in more detail below in conjunction with specific embodiments.

FIG. 5 is a schematic flowchart of a process of a transmission method for receiving mobile network multicast data by a WLAN terminal applicable to the network architecture of FIG. 1 according to another embodiment of the present invention.

In FIG. 5 , the access device is divided into two entities, a WLAN access device and a client device. Among them, the client device takes LTE CPE as an example, and the WLAN access device takes WiFi AP as an example. A description overlapping with the embodiment of FIG. 3 will be appropriately omitted.

501. The WiFi terminal sends a certain message to the WiFi AP.

For example, the message sent by the WiFi terminal 101 to the thin AP 103 may be a multicast group request message, or other messages.

502. The WiFi AP identifies the first multicast group request message.

For example, the first multicast group request message can be an IGMP report, including two subtype messages of joining a multicast group and leaving a multicast group, or a GMRP message, or other types of messages. The first multicast group request message carries the multicast group address and the address of the WiFi terminal 101 .

For example, the thin AP 103 identifies the type of message sent by the WiFi terminal 101. If the type of the message does not belong to the first multicast group request message, then the data message is used as a common data message to carry out CAPWAP encapsulation and through the CAPWAP tunnel 108. Forward. If the type of the message belongs to the first multicast group request message, the first multicast group request message may also be filtered, or the first multicast forwarding table may be directly updated.

503. The WiFi AP performs filtering processing on the first multicast group request message.

For example, pre-set the multicast group address filtering table. For example, the multicast group address filtering table can be configured by the administrator, including local configuration or remote configuration. In addition, the multicast group address filtering table can be updated through automatic learning. For example, the thin AP 103 can analyze the multicast group address information carried by the mobile network multicast data (for example, the multicast data carried by LTE eMBMS), and use the multicast group address information to update the multicast group address filtering table.

Specifically, the multicast group addresses in the multicast group address filtering table may be allowed multicast group addresses. In this case, if the multicast group address carried in the first multicast group request message is not the same as the multicast group address of the multicast data carried by any LTE eMBMS in the multicast group address filtering table, the The first multicast group request message is encapsulated by CAPWAP as an ordinary data message and forwarded through the CAPWAP tunnel 108, or the first multicast group request message may be directly discarded.

Alternatively, the multicast group addresses in the multicast group address filtering table may be forbidden multicast group addresses. In this case, if the multicast group address carried in the first multicast group request message belongs to the multicast group address filtering table, then the first multicast group request message can be used as a normal data packet for CAPWAP encapsulation and passed through the CAPWAP The tunnel 108 forwards, or may directly discard the first multicast group request message.

504. The WiFi AP updates the first multicast forwarding table.

For example, a mapping relationship between the multicast group address carried in the first multicast group request message and the address of the WiFi terminal 101 is established, and the first multicast forwarding table is updated using the mapping relationship. Specifically, if the first multicast group request message indicates joining a multicast group, for example, IGMP report joins, or a GMRPJoin message, then register the mapping relationship between the corresponding WiFi terminal address and the multicast group address in the first multicast forwarding table . Or, if the first multicast group request message represents leaving the multicast group, for example, the IGMP report leaves, or the GMRP Leave message, then delete the mapping of the corresponding WiFi terminal 101 address and the multicast group address in the first multicast forwarding table relation.

For another example, considering the broadcast attribute of the WiFi access device, the first multicast forwarding table may be updated only according to the multicast group address carried in the first multicast group request message. At this time, there is no need to consider the WiFi terminal address.

Specifically, if the first multicast group request message indicates joining a multicast group, for example, an IGMP report joins, or a GMRP Join message, and the multicast group address carried in the first multicast group request message does not belong to the first multicast group register the multicast group address carried in the first multicast group request message in the first multicast forwarding table. Or, if the first multicast group request message indicates leaving the multicast group, then send the first query message to all WiFi terminals, so that all WiFi terminals report the corresponding multicast group request message according to the first query message, when all terminals The corresponding multicast group request message reported means to leave the multicast group. For example, IGMP report leaves, or GMRP Leave message, or no WiFi terminal reports the corresponding multicast group request message to indicate joining the multicast group. The multicast group address carried in the first multicast group request message is deleted from the forwarding table.

After the thin AP 103 successfully updates the first multicast forwarding table, it sends a second multicast group request message to the LTE CPE 105, carrying the thin AP 103 address and the multicast group address. If the LTE CPE 105 is not discarding the unregistered multicast data forwarding policy, but broadcast forwarding, it is optional for the thin AP 103 to send the second multicast group request information to the LTE CPE 105.

505. The LTE CPE receives the second multicast group request message sent by the WiFi AP.

For example, the second multicast group address request message sent by the thin AP 103 received by the LTE CPE 105 may be an IGMP report (Internet Group Management Protocol report, Internet Group Management Protocol report), including two subtypes of joining a multicast group and leaving a multicast group message, or GMRP (GARP (Generic Attribute Registration Protocol, General Attribute Registration Protocol) MulticastRegistration Protocol, GARP Multicast Registration Protocol) message. The second multicast group address request message carries the thin AP 103 address and the multicast group address.

506. The LTE CPE updates the second multicast forwarding table.

For example, the LTE CPE 105 updates the second multicast forwarding table according to the mapping relationship between the thin AP 103 address carried in the second multicast group request message and the multicast group address. Specifically, for the updating manner of the second multicast forwarding table, reference may be made to the updating manner of the first multicast forwarding table in the embodiment in FIG. 3 , so details are not repeated here.

In order to maintain the second multicast forwarding table, the IGMP query function can be deployed on the LTE CPE to periodically send query packets to the WiFi AP, and the WiFi AP forwards the query packets to the WiFi terminals so that the WiFi terminals can Report the corresponding multicast group request message. For example, the LTE CPE 105 periodically sends a general query message and/or a specific group query message to the thin AP 103, and the thin AP 103 supports transparent forwarding of the query message. If the WiFi terminal 101 needs to receive corresponding multicast data, the WiFi terminal 101 will respond and report the corresponding multicast group request message to thin AP 103.

In addition, the IGMP query function can also be deployed on both the LTE CPE and the WiFi AP, that is, both the LTE CPE and the WiFi AP periodically send general query messages and/or group-specific query messages. In this deployment scenario, the WiFi AP can use the transparent forwarding mode or the local termination mode for the LTE CPE to periodically send general query messages and/or group-specific query messages to the WiFi AP. The local termination mode means that the WiFi AP receives the general query message and/or specific group query message periodically sent by the LTE CPE, and sends a corresponding response message to the LTE CPE according to the multicast group address information in the first multicast forwarding table, without Then forward to the WiFi terminal.

507. The LTE CPE receives LTE eMBMS multicast data.

For example, LTE CPE 105 receives LTE eMBMS multicast data transmitted via eMBMS channel 110.

508. The LTE CPE forwards and processes the multicast data of the LTE eMBMS.

For example, the LTE CPE 105 will analyze the multicast group address of the LTE eMBMS multicast data, and compare it with the multicast group address in the second multicast forwarding table, and perform forwarding processing of the multicast data according to the result of the comparison.

On the other hand, if the multicast group address of the LTE eMBMS multicast data obtained by the LTE CPE 105 in step 507 is not in the second multicast forwarding table, the LTE CPE 105 can discard the LTE eMBMS multicast data.

509. The LTE CPE sends the multicast data to the WiFi AP.

For example, LTE CPE 105 sends multicast data to thin AP 103.

510. The WiFi AP sends the multicast data to the WiFi terminal.

For example, if the multicast group address of the multicast data received by the thin AP 103 belongs to the first multicast forwarding table, the multicast data is forwarded to the WiFi terminal 101.

On the other hand, if the multicast group address of the LTE eMBMS multicast data obtained by the thin AP 103 in step 509 is not in the first multicast forwarding table, the thin AP 103 can discard the LTE eMBMS multicast data.

In this way, the WiFi AP can receive the LTE eMBMS multicast data transmitted outside the CAPWAP tunnel, thereby improving the transmission efficiency, and can also improve the service experience of the WiFi user terminal and the utilization rate of the LTE network.

It should be noted that if the WiFiAP and the LTE CPE are integrated in the embodiment of the present invention, the above message interaction between the WiFiAP and the LTE CPE belongs to the internal process of the device, and some processes can be appropriately combined, simplified or cut out, but not Affect the essential spirit of the present invention. If it is an eNB-integrated thin AP form, no CPE is required. After the eMBMS multicast data is directly sent to the eNB, it is passed to the thin AP through internal switching. Those of ordinary skill in the art can obtain the interactive process through the flow chart provided by the embodiment of the present invention. As shown in the figure, it is only necessary to replace the LTE CPE with an eNB base station. This form is only different in the deployment position of the thin AP.

FIG. 6 is a schematic flowchart of a process of a method for updating a multicast group address filtering condition applicable to the network architecture of FIG. 1 according to another embodiment of the present invention.

It should be understood that in this embodiment of the present invention, LTE-WiFi is taken as an example for description, but this embodiment of the present invention is not limited thereto.

601. The LTE CPE receives LTE eMBMS multicast data.

For example, LTE CPE 105 receives LTE eMBMS multicast data transmitted via eMBMS channel 110. The LTE CPE 105 can parse out the multicast group address information carried by the LTE eMBMS multicast data.

602. The LTE CPE sends multicast group address information to the WiFi AP.

603. The WiFi AP uses the multicast group address information sent by the LTE CPE to update the multicast group address filtering table stored on the WiFi AP.

For example, LTE CPE 105 receives LTE eMBMS multicast data, and sends the multicast group address information carried by the parsed LTE eMBMS multicast data to thin AP 103, and thin AP 103 automatically identifies whether the multicast group address of LTE eMBMS multicast data is It belongs to the multicast group address filtering table, and updates the multicast group address filtering table. Alternatively, the LTE CPE 105 forwards the received LTE eMBMS multicast data to the thin AP 103, and the thin AP 103 analyzes the multicast group address information carried by the LTE eMBMS multicast data, and identifies the multicast group address of the LTE eMBMS multicast data Whether it belongs to the multicast group address filtering table, and updates the multicast group address filtering table. In this way, the filtering condition for filtering the first multicast group request message is established and maintained.

In addition, the multicast group address filtering table can be configured by an administrator, including local configuration or remote configuration, which is not limited in this embodiment of the present invention.

In this way, the filter condition of the multicast group address can be maintained, and the forwarding efficiency of the multicast data can be improved.

Fig. 7 is a block diagram of a WLAN access device according to an embodiment of the present invention. The access device 70 of FIG. 7 includes:

The identification unit 71 identifies whether the message sent by the WLAN terminal is a first multicast group request message, and the first multicast group request message carries a WLAN terminal address and a multicast group address.

The update unit 72 is configured to update the first multicast forwarding table according to the multicast group address carried in the first multicast group request message if the message sent by the WLAN terminal identified by the identification unit is the first multicast group request message.

The forwarding unit 73 is configured to forward the mobile network multicast data to the WLAN terminal according to the first multicast forwarding table.

Optionally, in an implementation manner, the update unit 72 is specifically configured to establish a mapping relationship between the first multicast group address carried in the first multicast group request message and the WLAN terminal address, and use the mapping relationship to update the first multicast The forwarding table is updated. In this way, the first multicast forwarding table can be maintained. Further, the update unit 72 is specifically configured to register the mapping relationship between the corresponding WLAN terminal address and the multicast group address in the first multicast forwarding table if the first multicast group request message indicates joining the multicast group. Or, if the first multicast group request message indicates leaving the multicast group, delete the corresponding mapping relationship between the WLAN terminal address and the multicast group address in the first multicast forwarding table.

In another implementation, the update unit 72 is specifically configured to if the first multicast group request message indicates joining a multicast group, and the multicast group address carried in the first multicast group request message does not belong to the first multicast group address. register the multicast group address carried in the first multicast group request message in the first multicast forwarding table. Alternatively, if the first multicast group request message indicates leaving the multicast group, send the first query message to all WLAN terminals, so that all WLAN terminals report the corresponding multicast group request message according to the first query message. Specifically, when all corresponding multicast group request messages reported by all terminals indicate leaving the multicast group, or no WLAN terminal reports corresponding multicast group request messages indicating joining the multicast group, the first multicast forwarding table is deleted from the first multicast forwarding table. The multicast group address carried in the multicast group request message.

Optionally, the updating unit 72 is further configured to send a query message to the terminal, so that the terminal reports the first multicast group request message according to the query message.

Optionally, the identification unit 71 is further configured to filter the first multicast group request message according to the multicast group address filter condition, and the update unit 72 is specifically configured to filter the first multicast group request message according to the filtered first multicast group request message. update the first multicast forwarding table.

In this way, the filter condition of the multicast group address can be maintained, and the forwarding efficiency of the multicast data can be improved.

Optionally, the forwarding unit 73 is specifically configured to: receive mobile network multicast data; if the multicast group address of the mobile network multicast data belongs to the first multicast forwarding table, forward the multicast data to the WLAN terminal.

In the embodiment of the present invention, the access point identifies the first multicast group request message sent by the WLAN terminal, and uses the multicast group address carried in the first multicast group request message to update the first multicast forwarding table. In this way, the WLAN access device can directly forward the multicast data of the mobile communication network to the WLAN terminal, which not only enables ordinary WLAN terminals to receive rich multicast data services of the mobile communication network, but also effectively improves the throughput of multicast data in the mobile communication network. Receive efficiency, and avoid the waste of mobile communication network air interface resources.

FIG. 8 is a block diagram of a client device according to another embodiment of the present invention. An example of client device 80 is an LTE CPE. The client device 80 of FIG. 8 includes:

The receiving unit 81 receives the second multicast group request message sent by the WLAN access device.

The update unit 82 is configured to update the second multicast forwarding table according to the WLAN access device address and the second multicast group address carried in the second multicast group request message received by the receiving unit, and the second multicast forwarding table is used for Forward mobile network multicast data to WLAN access devices. In this way, the second multicast forwarding table can be maintained.

The forwarding unit 83 is configured to forward the mobile network multicast data to the WLAN access device according to the second multicast forwarding table.

The forwarding unit 83 is specifically configured to: receive mobile network multicast data; if the multicast group address of the mobile network multicast data belongs to the second multicast forwarding table, the client device forwards the mobile network multicast data to the WLAN access device.

It should be noted that the client device 80 can implement various steps related to the client device in the method in FIG. 4 , and to avoid repetition, no detailed description is given here.

In the embodiment of the present invention, the client device receives the mobile network multicast data, and if the multicast group address of the mobile network multicast data belongs to the second multicast forwarding table, then sends the multicast data to the WLAN access device. Or, forward the mobile network multicast data to the WLAN access device. In this way, the WLAN access device can directly forward the multicast data of the mobile communication network to the WLAN terminal, which not only enables ordinary WLAN terminals to receive rich multicast data services of the mobile communication network, but also effectively improves the throughput of multicast data in the mobile communication network. Receive efficiency, and avoid the waste of mobile communication network air interface resources.

The embodiment of the present invention also provides a system for a WLAN terminal to receive mobile network multicast data. As shown in FIG. 9 , the system 70 includes: a WLAN access device 71 and a client device 72. The device 71 may be a device with the same function applied in a WIFI AP or other types of networks, and the client device 72 may be a device with the same function applied in an LTE CPE or other types of networks, wherein:

The WLAN access device 70 is used to: identify whether the message sent by the wireless local area network WLAN terminal is a first multicast group request message, and the first multicast group request message carries a WLAN terminal address and a multicast group address; if the WLAN terminal The message sent is the first multicast group request message, then the first multicast forwarding table is updated according to the multicast group address carried in the first multicast group request message, and the second multicast forwarding table is sent to the client device A multicast group request message, the second multicast group request message carrying a WLAN access device address and a multicast group address; forwarding mobile network multicast data to the WLAN terminal according to the first multicast forwarding table;

The client device 80 is configured to: receive the second multicast group request message sent by the WLAN access device; send the second multicast group address according to the WLAN access device address and the multicast group address carried in the second multicast group request message; The forwarding table is updated, and the second multicast forwarding table is used for the client device to forward mobile network multicast data to the WLAN access device; according to the second multicast forwarding table, the mobile network multicast The data is forwarded to the WLAN access device.

Specifically, the WLAN access device 70 receives the message sent by the WLAN terminal, and identifies the type of the message, and if the type of the message belongs to the first multicast group request message, it can also filter the first multicast group request message processing, or directly update the first multicast forwarding table according to the multicast group address carried in the first multicast group request message. After successfully updating the first multicast forwarding table, the WLAN access device 70 sends a second multicast group request message to the client device 80, carrying the address of the WLAN access device 70 and the multicast group address. The client device 80 updates the second multicast forwarding table according to the mapping relationship between the address of the WLAN access device 70 carried in the second multicast group request message and the multicast group address. Further, the client device 80 receives the mobile network multicast data, and performs forwarding processing on the mobile network multicast data. That is, the client device 80 sends the multicast data to the WLAN access device 70 according to the second multicast forwarding table. Then, the WLAN access device 70 sends the multicast data to the WLAN terminal.

It should be noted that, the function realization of the WLAN access device and the client device in the system in which the WLAN terminal receives the mobile network multicast data provided by the embodiment of the present invention can refer to the corresponding embodiments of the aforementioned method or device, and will not be repeated here. .

The system for receiving mobile network multicast data by WLAN terminals provided by the embodiments of the present invention establishes and maintains a multicast forwarding table through WLAN access devices and client devices, so that WLAN terminal devices can directly receive mobile network multicast data, which not only makes common The WLAN terminal can also receive rich multicast data services in the mobile communication network, and can effectively improve the efficiency of receiving multicast data in the mobile communication network, and avoid waste of air interface resources in the mobile communication network.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (20)

1. A wireless local area network WLAN terminal receives the transmission method of mobile network multicast data, is characterized in that, comprises: The WLAN access device identifies whether the message sent by the wireless local area network WLAN terminal is a first multicast group request message, and the first multicast group request message carries a WLAN terminal address and a multicast group address; If the message sent by the WLAN terminal is a first multicast group request message, the WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the first multicast group request message ; The WLAN access device forwards mobile network multicast data to the WLAN terminal according to the first multicast forwarding table. 2. The method according to claim 1, wherein the WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the first multicast group request message, comprising: The WLAN access device establishes a mapping relationship between the multicast group address carried in the first multicast group request message and the WLAN terminal address, and uses the mapping relationship to update the first multicast forwarding table. 3. The method according to claim 2, wherein said updating the first multicast forwarding table using said mapping relationship comprises: If the first multicast group request message indicates joining a multicast group, the WLAN access device registers the mapping relationship between the WLAN terminal address and the multicast group address in the first multicast forwarding table; or, If the first multicast group request message indicates leaving the multicast group, the WLAN access device deletes the mapping relationship between the WLAN terminal address and the multicast group address in the first multicast forwarding table. 4. The method according to claim 1, wherein the WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the first multicast group request message, comprising: If the first multicast group request message indicates joining a multicast group, and the multicast group address carried in the first multicast group request message does not belong to the first multicast forwarding table, then the WLAN access device Registering the multicast group address carried in the first multicast group request message in the first multicast forwarding table; or, If the first multicast group request message indicates leaving the multicast group, the WLAN access device sends a first query message to all WLAN terminals, so that all WLAN terminals report corresponding Multicast group request message, when the corresponding multicast group request message reported by all WLAN terminals indicates leaving the multicast group, or no WLAN terminal reports the corresponding multicast group request message indicating joining the multicast group, in the first multicast transfer In publishing, delete the multicast group address carried in the first multicast group request message. 5. The method according to claim 1, wherein, before the WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the first multicast group request message, include: The WLAN access device filters the first multicast group request message according to the filter condition of the multicast group address; The WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the first multicast group request message, specifically including: The WLAN access device updates the first multicast forwarding table according to the multicast group address carried in the filtered first multicast group request message. 6. The method according to any one of claims 1-5, wherein before the WLAN access device identifies whether the message sent by the WLAN terminal is the first multicast group request message, the method further include: The WLAN access device sends a query message to the WLAN terminal, so that the terminal reports a first multicast group request message according to the query message. 7. The method according to any one of claims 1-6, wherein the WLAN access device forwards mobile network multicast data to the WLAN terminal according to the first multicast forwarding table, comprising: The WLAN access device receives mobile network multicast data; If the multicast group address of the multicast data belongs to the first multicast forwarding table, the WLAN access device forwards the multicast data to the WLAN terminal. 8. A wireless local area network WLAN terminal receives the transmission method of mobile network multicast data, is characterized in that, comprises: The client device receives the second multicast group request message sent by the wireless local area network WLAN access device, and the second multicast group request message carries the address of the WLAN access device and the multicast group address; Update the second multicast forwarding table according to the WLAN access device address and the multicast group address carried in the second multicast group request message, and the second multicast forwarding table is used for the client device to send messages to all The WLAN access device forwards the mobile network multicast data; The client device forwards the mobile network multicast data to the WLAN access device according to the second multicast forwarding table. 9. The method according to claim 8, wherein the client device forwards the mobile network multicast data to the WLAN access device according to the second multicast forwarding table, comprising: The client device receives mobile network multicast data; If the multicast group address of the mobile network multicast data belongs to the second multicast forwarding table, the client device forwards the mobile network multicast data to the WLAN access device. 10. A wireless local area network WLAN access device, characterized in that it comprises: An identification unit, configured to identify whether the message sent by the wireless local area network WLAN terminal is a first multicast group request message, and the first multicast group request message carries a WLAN terminal address and a multicast group address; An update unit, configured to, if the message sent by the WLAN terminal identified by the identification unit is a first multicast group request message, then perform an update to the first group according to the multicast group address carried in the first multicast group request message. Update the forwarding table; A forwarding unit, configured to forward mobile network multicast data to the WLAN terminal according to the first multicast forwarding table. 11. The WLAN access device according to claim 10, wherein the update unit is specifically configured to establish a mapping relationship between the multicast group address carried in the first multicast group request message and the WLAN terminal address, The first multicast forwarding table is updated by using the mapping relationship. 12. The WLAN access device according to claim 11, wherein the update unit is specifically configured to, if the first multicast group request message indicates joining a multicast group, then in the first multicast forwarding table Register the mapping relationship between the corresponding WLAN terminal address and the multicast group address; or, If the first multicast group request message indicates leaving the multicast group, delete the corresponding mapping relationship between the WLAN terminal address and the multicast group address in the first multicast forwarding table. 13. The WLAN access device according to claim 10, wherein the updating unit is specifically configured to if the first multicast group request message indicates joining a multicast group, and the first multicast group request The multicast group address carried in the message does not belong to the first multicast forwarding table, registering the multicast group address carried in the first multicast group request message in the first multicast forwarding table; or, Specifically, if the first multicast group request message indicates leaving the multicast group, send a first query message to the WLAN terminal, so that all WLAN terminals report the corresponding multicast group request according to the first query message message, when all the corresponding multicast group request messages reported by all terminals indicate to leave the multicast group, or when no WLAN terminal reports the corresponding multicast group request message to indicate to join the multicast group, delete the described in the first multicast forwarding table The multicast group address carried in the first multicast group request message. 14. The WLAN access device according to any one of claims 10, wherein the identification unit is further configured to filter the first multicast group request message according to the multicast group address filter condition, The update unit is specifically configured to update the first multicast forwarding table according to the multicast group address carried in the filtered first multicast group request message. 15. The WLAN access device according to any one of claims 10-14, wherein the updating unit is further configured to send a query message to the terminal, so that the terminal reports the first multicast message according to the query message Group request message. 16. The WLAN access device according to any one of claims 10-15, wherein the forwarding unit is specifically configured to: receive mobile network multicast data; if the multicast group of the mobile network multicast data If the address belongs to the first multicast forwarding table, the multicast data is forwarded to the WLAN terminal. 17. The WLAN access device according to any one of claims 10-16, wherein the WLAN access device comprises an access point AP, or a combination of an access point AP and a client equipment CPE, or a base station Combination with thin AP. 18. A client device, characterized in that, comprising: The receiving unit is configured to receive the second multicast group request message sent by the wireless local area network WLAN access device, and send the second multicast group request message to the updating unit, the second multicast group request message carrying the WLAN access Device address and multicast group address; An updating unit, configured to receive the second multicast group request message sent by the receiving unit, and update the second group according to the WLAN access device address and the multicast group address carried in the second multicast group request message. The broadcast forwarding table is updated, and the second multicast forwarding table is used to forward the mobile network multicast data to the WLAN access device; A forwarding unit, configured to forward the mobile network multicast data to the WLAN access device according to the second multicast forwarding table. 19. The client device according to claim 18, wherein the forwarding unit is specifically configured to: receive mobile network multicast data; if the multicast group address of the mobile network multicast data belongs to the second multicast forwarding table, the client device forwards the mobile network multicast data to the WLAN access device. 20. A system for receiving mobile network multicast data by a wireless local area network WLAN terminal, characterized in that the system includes a WLAN access device and a client device, wherein: The WLAN access device is used to: identify whether the message sent by the wireless local area network WLAN terminal is a first multicast group request message, and the first multicast group request message carries a WLAN terminal address and a multicast group address; if the WLAN The message sent by the terminal is the first multicast group request message, then update the first multicast forwarding table according to the multicast group address carried in the first multicast group request message, and send the first multicast group request message to the client device Two multicast group request messages, the second multicast group request message carrying the WLAN access device address and the multicast group address; forwarding mobile network multicast data to the WLAN terminal according to the first multicast forwarding table; The client device is configured to: receive a second multicast group request message sent by the WLAN access device; The broadcast forwarding table is updated, and the second multicast forwarding table is used for the client device to forward mobile network multicast data to the WLAN access device; according to the second multicast forwarding table, the mobile network group The broadcast data is forwarded to the WLAN access device.

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