Method, device and system for sharing load

Abstract

An embodiment of the invention provides a method, a device and a system thereof for sharing burden. The invention relates to the field of communication technology for increasing the usage factor of network resource in network television system, reducing the burden of network device and increasing the network performance. The system of the invention comprises a first network device, a second network device and a third network device. The method of the invention comprises the following steps: sharing multicast flow by the second network device and the third network device according to group; transmitting the shared multicast flow by the second network device to the third network device along a counter-clockwise direction of the loop when the first network device transmits the shared multicast flow to the third network device along the clockwise direction of the loop; or transmitting the shared multicast flow by the second network device to the third network device along a clockwise direction of the loop when the first network device transmits the shared multicast flow to the third network device along the counter-clockwise direction of the loop. The technical scheme provided by the embodiment of the invention can be widely applied to the multicast system.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular to a load sharing method, device and system. Background technique [0002] IPTV (Internet Protocol Television, Internet Television) is a television broadcasting service based on IP (Internet Protocol, Internet Protocol). This service uses TV sets or personal computers as display terminals, and provides users with broadband services such as digital broadcast TV, video services, information services, interactive communities, interactive leisure and entertainment, and e-commerce through the multicast function of broadband networks. [0003] VPLS (Virtual Private LAN Service, Virtual Private LAN Service) is a technology that utilizes MPLS (Multi-Protocol Label Switching, Multi-Protocol Label Switching) to provide LAN (Local Area Network, Local Area Network) services across a wide area network. Multi-point services can be realized on the network architecture. [0004...

AI Technical Summary

Problems solved by technology

However, in the existing method, the main SPE or the backup SPE can only forward all the multicast streams requested by the user to the UPE clockwise or counterclockwise on the ring. When the number of programs is large, the load of the main SPE or the backup SPE is likely to be heavy. ; and the bandwidth of the backup SPE in the ring is usually in a standby state in the other direction, which wastes network resources; on the other hand, the UPE can only passively copy the multicast stream forwarded by the main SPE or backup SPE from one direction of the ring , when multiple access devices are connected to the UPE, for example: multiple DSLAMs (Digital Subscriber Line Access Multiplexer, Digital Subscriber Line Access Multiplexer) or switches are connected to the UPE, unidirectional replication may easily lead to insufficient bandwidth or UPE multicast streams The load in the ingress direction is too heavy, which affects the performance of the network

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