Multicast message transmission method

Abstract

The present invention provides a method for transmitting multicast messages, wherein the method comprises the following: step S102, establishing a second corresponding relation based on a first corresponding relation, wherein the first corresponding relation expresses adding one or more ports to one or more multicast groups, and the second corresponding relation expresses that one or more permanent virtual circuits are added to one or more multicast groups through the appurtenant ports of the permanent virtual circuits; and step S104, determining the multicast message transmission path according to the first corresponding relation and the second corresponding relation; and step S106, producing a multicast message, and transmitting the multicast message through the multicast message transmission path. With the invention, the object that a plurality of PVC's in one DSL port are added into one multicast group synchronously can be realized without any change of the prior architecture; meanwhile, the prior functions are not influenced.

Description

technical field [0001] The invention relates to the communication field, in particular to a multicast message sending method. Background technique [0002] For DSLAM (Digital Subscriber Line Access Multiplexer, digital subscriber line access multiplexer) equipment with ADSL (Asymmetrical Digital Subscriber Loop, asymmetrical digital subscriber loop) port, each DSL (Digital Subscriber Line, digital subscriber line) port Generally with multiple PVC (PermanentVirtual Circuits, permanent virtual circuit). Early devices based on FPGA (Field Programmable Gate Array, Field Programmable Gate Array), due to the limitation of FPGA external RAM (Random Access Memory, Random Access Memory) space, generally cannot support a large-capacity multicast table, so there is no It is impossible to fully realize the PVC-level multicast function. More specifically, the early FPGA-based multicast function often has such a constraint: different PVCs in a DSL port cannot join the same multicast grou...

AI Technical Summary

Problems solved by technology

Early devices based on FPGA (Field Programmable Gate Array, Field Programmable Gate Array), due to the limitation of FPGA external RAM (Random Access Memory, Random Access Memory) space, generally cannot support a large-capacity multicast table, so there is no It is impossible to fully realize the multicast function at the PVC level. More specifically, the early multicast functions based on FPGA often have such a constraint: different PVCs in a DSL port cannot join the same multicast group at the same time.

That is to say, for a certain multicast group, in the same DSL port, only one multicast packet can be sent, and multiple multicast packets cannot be sent at the same time.

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