Network Coding Connection Management Method Based on Peer-to-Peer Traffic Triggering

Abstract

The invention discloses a network coding connection management method based on peer-to-peer communication flow triggering. The network coding connection management method based on the peer-to-peer communication flow triggering includes the steps: finding optical network units (ONU) where peer-to-peer communication flow exists by an optical line terminal (OLT) and carrying out building and removing of network code pairing connection on the ONU, wherein each ONU is only involved collaboratively; marking and caching data frames which are probably involved in network coding by the ONU, carrying out corresponding caching and coding on network code data frames by an optical line input (OLI), and carrying out marking and sending on the data frames which are through the network coding; and carrying out network decoding and corresponding cache clearing on the received data frames which are coded by the ONU. According to the network coding connection management method based on the peer-to-peer communication flow triggering, master-slave relation between the OLT and the ONU is kept, each ONU is not need to carry out learning of logical link identifiers (LLID) and media access control (MAC) addresses on downlink data frames locally and not need to maintain a paring table of LLID of the whole network ONU and the MAC addresses of an under-link host machine. The network coding connection management method based on the peer-to-peer communication flow triggering is further capable of enabling a network coding theory to be specifically and fully applied in tree-shaped topological passive optical networks and being compatible with the existing passive optical networks.

Description

technical field [0001] The invention relates to a network coding connection management method triggered based on peer-to-peer communication traffic, and belongs to the technical field of communication. Background technique [0002] The rise of social networks and peer-to-peer P2P services has put enormous pressure on metro and backbone networks. According to Ipoque, a German Internet research organization, P2P services have completely dominated today's Internet, and 50-90% of the total traffic comes from P2P. A type of business characterized by peer-to-peer communication. In this context, higher requirements are put forward for the local switching capability of the equipment. [0003] Network coding is mostly used to solve the service transmission under the butterfly network, but there is no effective coding mechanism for the tree structure with low connectivity. At the same time, the tree structure on the access network side has caused a serious bandwidth bottleneck. Ther...

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Problems solved by technology

Because the downlink data frame in the actual passive optical network is encrypted by stirring, each ONU can only learn the MAC address of the LLID and the local matching data frame each time, so this solution has the practical difficulty that the address table needs to be learned many times for a long time and cannot be completely established. possibility, and because each ONULLID information is known by all ONUs, communication security issues such as eavesdropping will also be exposed

At the same time, this solution has many disadvantages such as cumbersome mechanism process, relatively large service delay and jitter, so the present invention proposes a network coding method dominated by OLT in passive optical network that can solve the above problems, and proposes the The detailed implementation of the method

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