Multicast method, multicast system and multicast equipment

Abstract

The invention discloses a multicast method, comprising following steps: a sending end authenticates a receiver requesting to attend to multicast group according to the adding group request of the receiver; the sending end adds the receiver passing authentication to a transmission item corresponding to the multicast group which is requested to attend to, and sends the adding group request for a transmission device; the transmission device adds the sending end to the transmission item corresponding to the multicast group which is requested to attend to according to the adding group request fromthe sending end. The invention also discloses a multicast system and a multicast device. The invention is that the sending end authenticates the receiver request to attend to the multicast group, andafter passing authentication the receiver upgrades or establishes the transmission item, then progressively report the adding group request to the upstream transmission device, and each upstream transmission device upgrades or establishes corresponding transmission item for downstream transmission device or the sending end, so that in the system, any device is not an illegal receiver transmissionmulticast frame. The invention also reduces system burden and improves reliability of the multicast.

Description

technical field [0001] The invention relates to data transmission technology in wireless communication, in particular to a multicast method, a multicast system and a multicast device. Background technique [0002] Multicast is a data transmission method between unicast and broadcast, that is, the destination address of the data frame is a multicast address, and the sender only transmits the data frame to multiple receivers belonging to the multicast group. end. In wireless communication, the difference between multicast and unicast is that multicast only sends a copy of the data; the difference from broadcast is that multicast traffic is only received and processed by listening devices that are members of the multicast group. For this one-to-many data transmission, multicast is more efficient than unicast and broadcast. [0003] Taking multicast transmission in a wireless mesh (Mesh) network as an example, since any wireless device node in the network can act as a Mesh net...

AI Technical Summary

Problems solved by technology

[0006] This adds a lot of unnecessary burden to the Mesh network and seriously affects the security of the system

Moreover, the Mesh network is a wireless transmission environment, and cannot use methods such as port control to control multicast flooding like a wired network. Therefore, the harm of multicast flooding is more prominent in a Mesh network.

[0007] It can be seen that the existing multicast technology adds unnecessary burden to the system when transmitting multicast frames, and cannot effectively guarantee the security of multicast, so that the reliability of multicast is low

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