WO2012071933A1

WO2012071933A1 - Method and system for service processing

Info

Publication number: WO2012071933A1
Application number: PCT/CN2011/079991
Authority: WO
Inventors: 范亮; 王怀滨; 袁博
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-11-30
Filing date: 2011-09-22
Publication date: 2012-06-07
Also published as: CN102480479A

Abstract

Disclosed are a method and a system for service processing. In both, a corresponding multicast stream from an upper layer network can be introduced by a backup broadband network gateway (BNG) device on the basis of user multicast group information synchronized from a master BNG device; the multicast stream introduced is transmitted directly to a user by the backup BNG device upon the occurrence of a switchover between the master and the backup BNG devices. In the method and the system of the present invention, for video or other digital services, employment of the backup BNG device for a synchronized introduction of the multicast stream corresponding to the user multicast group reduces the duration of interruption caused by the switchover between the master and the backup BNG devices, thereby achieving an effect of the instant resumption of the user multicast stream at the same time as the switchover takes place between the master and the backup BNG devices. This reduces greatly or even eliminates user perception of the interruption to the video service, thereby enhancing the user experience and at the same time improving brand image in video service for the operator.

Description

Business processing method and system

The present invention relates to the field of communications, and in particular, to a service processing method and system. Background technique

In recent years, the rapid development of the media industry has led to the continuous improvement of the quality of video services and the rapid increase in the number of video programs. The video service has also deviated from the traditional single-set box/telephone reception method, to various receiving terminals such as personal computers and mobile phones. The way of development has a broader and deeper impact on people's life consumption. At the same time, the booming video services put forward higher requirements for bearer networks in terms of bandwidth and reliability. The service bearer mode has also gradually shifted from the simultaneous broadcast of all previous programs to on-demand multicast and unicast. Combined on-demand mode.

Multicast is the main carrier of the current IP (Internet Protocol) video service. In a broadband access network, the control point of the user multicast service is at the Service Edge layer of the network, usually BNG (Broadband Network). Gateway, Broadband Network Gateway) device. Each BNG device manages thousands or even tens of thousands of broadband users at the same time. It is responsible for users' multicast rights management and multicast traffic distribution. Once the device fails or the connectivity to the upper and lower layers fails, a large number of users will be created. The video service was interrupted, causing significant losses to operators. To this end, the BNG equipment needs to have high reliability for the multicast service, ensure the continuity of the video service of the user, and protect the service brand of the operator. The BNG device includes at least one of the following: a BAS (Broadband Access Server), a BRAS (Broadband Remote Access Server), a BNAS (Broadband Network Access Server), and a BNAS (Broadband Network Access Server). LNS (L2TP Network Server, Layer 2 Tunneling Protocol Network Server), SR (Service Router, Service Router), SGW (Serving Gateway, LTE Service Gateway), etc. There are various methods for protecting the multicast service. The fault protection method for the BNG device and its uplink and downlink links is as follows: configure two BNG devices (the main BNG device and the standby BNG device respectively), and Synchronize user information and user multicast service information (including multicast group information and user authorization information) between devices. When the primary BNG device or its uplink and downlink links fails, the standby BNG device quickly detects and automatically switches to the active state to ensure that the user does not need to manually obtain the video program before and after the failure occurs. The specific network topology is shown in Figure 1.

However, after the standby BNG device becomes the active state, the multicast stream needs to be re-introduced from the upper-layer network according to the previously synchronized user multicast group information and user authorization information. (BNG and upper-layer networks usually adopt multicast routing protocols, and multicast. The drainage time is in the order of seconds. Therefore, the user can still perceive the short interruption of the video service; this obviously reduces the user experience and is not conducive to the operator to promote the video service. Summary of the invention

In view of this, the main purpose of the present invention is to provide a service processing method and system, which avoids service interruption and improves user experience.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A business processing method, including:

The standby broadband network gateway BNG device introduces the corresponding multicast stream from the upper layer network according to the user multicast group information that is synchronized by the primary BNG device. After the active/standby switchover of the BNG device occurs, the standby BNG device directly introduces the introduced multicast. The stream is sent to the user.

The method for introducing the corresponding multicast stream is:

After receiving the user multicast group information synchronized by the active BNG device, the standby BNG device searches for the local multicast routing table, and introduces the multicast group not included in the local routing table from the upper layer network through the multicast routing protocol. The multicast stream corresponding to these multicast groups.

The multicast route between the standby BNG device and the upper layer network is in accordance with a multicast routing protocol, and includes at least one of an IGMP protocol, a PIM protocol, and a multicast VPN protocol. The type of the BNG device includes at least one of the following: a broadband access server BAS, a broadband remote access server BRAS, a broadband network access server BNAS, a Layer 2 tunneling protocol network server LNS, a service router SR, and an LTE service gateway.

The multicast stream corresponds to a video service.

A service processing system, including a multicast stream importing unit and a multicast stream forwarding unit, where the multicast stream importing unit is configured to be introduced from an upper layer network according to user multicast group information synchronized by the primary BNG device. Corresponding multicast stream, and notifying the introduced multicast stream to the multicast stream forwarding unit;

The multicast stream forwarding unit is configured to directly send the imported multicast stream to the user after the active/standby switchover of the BNG device occurs.

When the multicast stream importing unit introduces a corresponding multicast stream, it is used to:

After receiving the multicast group information of the user that is synchronized by the active BNG device, the local multicast routing table is searched for, and the multicast group not included in the local routing table is introduced into the upper layer network through the multicast routing protocol. The corresponding multicast stream of the group.

The multicast routing between the multicast stream importing unit and the upper layer network follows a multicast routing protocol, and includes at least one of an IGMP protocol, a PIM protocol, and a multicast VPN protocol.

The type of the BNG device includes at least one of the following: BAS, BRAS, BNAS, LNS, SR, and LTE service gateway.

The multicast stream corresponds to a video service;

The multicast stream import unit and the multicast stream forwarding unit are both disposed in the standby BNG device. The service processing method and system of the present invention can reduce the multicast stream interruption time caused by the active/standby switchover process of the BNG device by using the standby BNG device to synchronously introduce the multicast stream corresponding to the multicast group in the video or other data service. In order to achieve the effect of immediately recovering the user multicast stream at the same time as the active/standby switchover of the BNG device (which can achieve the millisecond-level switching effect), the user's perception of the video service interruption is greatly reduced or even eliminated, and the user experience is improved. Enhance the brand of carrier video services. DRAWINGS

1 is a schematic diagram of a network topology according to the present invention;

2 is a schematic diagram of a business process flow of the present invention;

3 is a schematic diagram of a network topology according to a first embodiment of the present invention;

4 is a flowchart of service processing according to a first embodiment of the present invention;

FIG. 5 is a schematic diagram of a network topology according to a second embodiment of the present invention; FIG.

6 is a flowchart of service processing according to a second embodiment of the present invention;

FIG. 7 is a diagram of a service processing system according to an embodiment of the present invention. detailed description

In the case of a BNG device or its uplink and downlink faults, in order to ensure the continuity of the user's multicast service, the existing multicast service information technology can be backed up on the existing BNG equipment (the specific network topology is shown in Figure 1). As shown in the figure, the standby BNG device imports the corresponding multicast stream from the upper layer network according to the received user multicast group information, and directly sends the multicast stream to the user after the active/standby switchover occurs. The above operation mode can reduce the interruption of multicast traffic during the active/standby switchover. Based on the existing millisecond-level active/standby switchover technology, users can not experience the effect of video service interruption before and after failover. Of course, in practical applications, there may be many types of specific services, rather than just one type of video service, or other data services. In the following, the video service is taken as an example for description.

According to the above analysis, in order to ensure the continuity of video services, the steps shown in Figure 2 can be performed from the perspective of operation ideas:

Step 210: The standby BNG device introduces a corresponding multicast stream from the upper layer network according to the user multicast group information that is synchronized by the primary BNG device.

Step 220: After the active/standby switchover of the BNG device occurs, the standby BNG device directly introduces The multicast stream is sent to the user.

Further, the method for ensuring the continuity of the video service may further have the following features: After receiving the multicast group information of the user that is synchronized by the active BNG device, the standby BNG device searches for the local multicast routing table for the local routing table. The multicast groups not included in the multicast group are imported from the upper-layer network through the multicast routing protocol. In this way, it can be ensured that the multicast stream corresponding to the same multicast group is not repeatedly introduced on the basis that the standby BNG device has introduced some multicast streams (for example, the device serves as the primary or backup BNG device of other users at the same time). .

The multicast routing protocol between the standby BNG device and the upper layer network includes at least one of an IGMP protocol, a PIM protocol, and a multicast VPN protocol.

The types of BNG equipment include at least one of the following: BAS, BRAS, BNAS, LNS, SR, SGW, and the like.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments.

The first embodiment: As shown in FIG. 3, the BFD (Bidirectional Forwarding Detection) protocol is used to detect the link state of the two BNG devices. The VRRP (Virtual Router Redundancy Protocol) protocol is used. Perform BNG device status switching to implement user backup and user multicast information backup. BNG1 is the primary device and BNG2 is the standby device.

The specific business process that can be performed by the network topology shown in Figure 3 is shown in Figure 4. Referring to FIG. 4, FIG. 4 is a flowchart of a service process according to a first embodiment of the present invention, where the process includes the following steps:

Step 401: Establish a TCP connection between BNG1 and BNG2 as a message channel for backing up online user information (including user multicast service information);

Step 402: Run the BFD protocol on the active and standby BNG devices to detect the network connectivity between the active and standby BNG devices, between the BNG1 and the lower device, between the BNG2 and the lower device, and between the active BNG and the upper network device. ;

Step 403, running VRRP protocol between BNG1 and the lower device of BNG2, and BNG In the active/standby state, the BNG1 is configured as the primary BNG device, and the BNG2 is the standby BNG device. In step 404, the BNG1 sends the online user information (including the user multicast service information) to the BNG2 through the message channel.

Step 405: The BNG2 introduces a corresponding multicast stream from the upper layer network according to the user multicast group information that is synchronized by the BNG1.

Step 406: When the network between the BNG1 and the lower device is faulty, the BNG1 and the BNG2 are faulty through the BFD detection mechanism, and the active/standby state is exchanged through the VRRP switching mechanism. Step 407: The two BNG devices are in active/standby switchover, BNG2 The multicast stream is sent to the user according to the user multicast group information.

The second embodiment: As shown in FIG. 5, in three BNG equipments, BNG1 and BNG2 are primary devices, and BNG3 is a backup device. BFD is used between BNG1 and BNG3, and BNG2 and BNG3 are used to detect link status. At the same time, the VRRP protocol is run to switch the state of the BNG device, and the function of providing backup for multiple BNG devices by using one BNG device is realized.

The specific service processing flow that can be performed by the network topology shown in Figure 5 is shown in Figure 6. Referring to FIG. 6, FIG. 6 is a flowchart of service processing according to a second embodiment of the present invention, where the process includes the following steps:

Step 601: Establish a TCP connection between BNG1 and BNG3 and BNG2 and BNG3 as a message channel for backing up online user information (including user multicast service information);

Step 602: Run BFD on three BNG devices to detect BNG1 and BNG3, BNG2 and BNG3, BNG1 and lower device 1, BNG3 and lower device 1, BNG2 and lower device 2. Interconnection between BNG3 and lower layer equipment 2, and three BNGs and upper layer networks;

Step 603: Run VRRP between BNG1 and BNG3, BNG2 and BNG3, and associate with BNG and BNG3, and configure BNG1 and BNG2 as main BNGs respectively.

Step 604, BNG1 and BNG2 respectively send online user information (package) through the message channel Including user multicast service information) sent to BNG3;

Step 605: After receiving the user multicast group information that is synchronized by the BNG1 and the BNG2, the BNG3 searches for the local multicast routing table, and introduces the multicast group from the upper layer network through the multicast routing protocol for the multicast group not included in the local routing table. Multicast stream corresponding to the multicast group;

Step 606: When the BNG1 is faulty, the BNG3 detects the fault through the BFD detection mechanism, and implements the active/standby state switching by using the VRRP switching mechanism.

Step 607, the BNG3 status changes to the primary, and the multicast stream is sent to the user according to the user multicast group information synchronized by the BNG1.

Step 608: After the fault recovery of the BNG1, the VRRP neighbor relationship and the BFD session are re-established with the BNG3, and are temporarily maintained in the standby state.

Step 609: The online user information (including the user multicast service information) is backed up between the BNG1 and the BNG3, and the BNG1 introduces the corresponding multicast stream from the upper layer network according to the user multicast group information that is synchronized by the BNG3 device.

Step 610: The BNG1 and the BNG3 device trigger the master/slave state switchover through the VRRP protocol. After the switchover, the BNG1 sends the multicast stream to the user according to the user multicast group information.

In order to ensure that the above operation ideas and embodiments can be smoothly implemented, the settings shown in FIG. 7 can be performed. Referring to FIG. 7, FIG. 7 is a diagram of a service processing system according to an embodiment of the present invention. The system includes a connected multicast stream import unit and a multicast stream forwarding unit. The foregoing units may be configured in a standby BNG device.

In actual application, the multicast stream importing unit can import the corresponding multicast stream from the upper layer network according to the user multicast group information that is synchronized by the primary BNG device, and notify the multicast stream forwarding unit of the introduced multicast stream. After the active/standby switchover of the BNG device occurs, the multicast stream forwarding unit directly sends the imported multicast stream to the user.

In summary, the service processing method and system of the present invention can simultaneously introduce a user multicast group pair by using a standby BNG device for video or other data services, whether it is a method or a system. The method of multicasting the multicast stream can reduce the interruption of the multicast stream caused by the active/standby switchover of the BNG device, so as to restore the user multicast immediately after the active/standby switchover of the BNG device (which can achieve the millisecond-level switching effect). The effect of the stream greatly reduces or even eliminates the user's perception of video service interruption, enhances the user experience and enhances the operator's video service brand.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

1. A business processing method, comprising:

2. The method according to claim 1, wherein the method for introducing a corresponding multicast stream is:

The method according to claim 2, wherein the multicast route between the backup BNG device and the upper layer network complies with a multicast routing protocol, and includes at least one of an IGMP protocol, a PIM protocol, and a multicast VPN protocol.

The method according to any one of claims 1 to 3, wherein the type of the BNG device comprises at least one of the following: a broadband access server BAS, a broadband remote access server BRAS, a broadband network access server BNAS, Layer 2 tunneling protocol network server LNS, service router SR, LTE service gateway.

5. The method according to claim 4, wherein the multicast stream corresponds to a video service.

A service processing system, including a multicast stream importing unit and a multicast stream forwarding unit, where the multicast stream importing unit is configured to use the user multicast group information synchronized from the primary BNG device from the upper layer network. Introducing a corresponding multicast stream, and notifying the introduced multicast stream to the multicast stream forwarding unit;

The system according to claim 6, wherein the multicast stream import unit introduces a corresponding When the multicast stream is used, it is used to:

The system according to claim 7, wherein the multicast route between the multicast stream importing unit and the upper layer network follows a multicast routing protocol, including at least one of an IGMP protocol, a PIM protocol, and a multicast VPN protocol. One.

The system according to any one of claims 6 to 8, wherein the type of the BNG device comprises at least one of the following: BAS, BRAS, BNAS, LNS, SR, LTE service gateway.

10. The system according to claim 9, wherein

The multicast stream corresponds to a video service;

The multicast stream I entry unit and the multicast stream forwarding unit are all disposed in the standby BNG device.