Transmission method of multicast data based on hybrid optical switching network

Abstract

The invention belongs to a transmission method of multicast data based on a hybrid optical switching network in the technology of network communication. The method comprises the steps of: setting the positions of each spectral node, dividing an internet area according to the spectral nodes, distributing a wavelength resource, building a multicast route, and transmitting multicast data. The methodfor setting up a network comprises: firstly, dividing the network into a plurality of small areas, setting only one spectral node in the each area, and setting the other nodes as common nodes to reduce the setting quantity, the cost and the occupancy quantity of the wavelength resource of the spectral nodes in a multicast network; in the field of network operating, organically combining an OCS all-optical network multicast technology with an OBS all-optical network multicast technology to enlarge the use ratio of bandwidth with the OBS technology in the area; and adopting a master-slave hybrid optical switching technology among the areas to reduce the packet loss rate. Therefore, the method can effectively reduce the setting quantity, the cost and the occupancy quantity of the wavelength resource of the spectral nodes in the multicast network, improves the use ratio of the bandwidth and the reliability of the network operation, and reduces the packet loss rate and the operation cost of the network, etc.

Description

technical field [0001] The invention belongs to the technical field of optical network communication, in particular to a method for transmitting multicast data using a hybrid optical switching network. Background technique [0002] At present, basic optical network switching technologies include: optical circuit switching, namely OCS (Optical Circuit Switching,), optical packet switching, namely OPS (Optical Packet Switching,) and optical burst switching, namely OBS (Optical Burst Switching, OBS), although they All have achieved all-optical switching, and each has certain characteristics; but they also have their own shortcomings, especially when data transmission is performed in a network environment with frequent changes in data transmission volume or high burst switching, there are difficulties that are difficult to overcome. obstacles. in: [0003] OCS switching technology establishes a "circuit" connection through the entire all-optical core network between edge route...

AI Technical Summary

Problems solved by technology

However, in a multicast tree network for multicast services, if there are multiple destination nodes on a certain branch of the splitting node, and there are no other splitting nodes on the branch, more wavelength resources will be used for multicast transmission , otherwise there will be mutual competition, resulting in only unicast services on this branch in the OCS network, and for the OBS network, it will cause the destination node on this branch to be unable to complete the service reception

Therefore, if the splitting node configuration is unreasonable (such as: there are a large number of nodes in the network that are not adjacent nodes of the splitting node), more wavelength resources will be consumed to cover all destination nodes, which will increase the cost of multicast routing

Therefore, in the above-mentioned all-optical network multicast method: adopting a single OCS all-optical network multicast, its bandwidth utilization rate is low, and adopting a single OBS all-optical network multicast has the defect that the packet loss rate is higher; In the case of setting up optical splitting nodes, if the distribution (setup) of optical splitting nodes is unreasonable, then whether OCS network or OBS network is used for all-optical multicasting, more wavelength resources will be occupied

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