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Network coding and transmission method based on multiple paths in software defined FiWi (Fiber Wireless) network

A software-defined, transmission method technology, applied in the direction of transmission modification based on link quality, optical fiber transmission, transmission system, etc., can solve the problems of reducing overall network performance, increasing network delay, wasting network bandwidth, etc.

Active Publication Date: 2018-05-25
HEBEI UNIV OF ENG
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Problems solved by technology

[0005] After analysis, it is found that the existing technology has the following shortcomings: 1) No matter what kind of network is used for multi-path transmission, the problem of packet disorder in the process of data reassembly cannot be avoided; If too many extra packets are inserted, it will cause network data redundancy, waste network bandwidth, and increase network delay. On the contrary, if too few are inserted, data retransmission will be caused at the receiving end, which also wastes network resources and increases network time. Delay, reducing the overall performance of the network

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  • Network coding and transmission method based on multiple paths in software defined FiWi (Fiber Wireless) network
  • Network coding and transmission method based on multiple paths in software defined FiWi (Fiber Wireless) network
  • Network coding and transmission method based on multiple paths in software defined FiWi (Fiber Wireless) network

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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0027] A software-defined FiWi network architecture that supports multi-path transmission and in-stream network coding such as figure 1shown. It is divided into application layer, control layer and infrastructure layer as a whole. Various traditional FiWi network nodes are deployed in the infrastructure layer, including optical line terminal (OLT, Optical Line Terminal), optical network unit gateway node (ONU-MPP, Optical NetworkUnit- Mesh Portal Point) and wireless access point (MAP, Mesh Access Point) and other nodes are responsible for data forwarding operations. The control layer is a controller as a whole, which is the core of the network. It concentrates all the control functions of the network, generates flow tabl...

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Abstract

The invention discloses a network coding and transmission method for realizing transmission based on multiple paths in a software defined FiWi (Fiber Wireless) network. Function expansion is carried out on a flow table. A whole network is centrally controlled by a controller. The number of inserted redundant packets in a network coding process is determined through design of a dynamic adaptive algorithm. Coding packets are reasonably allocated on the multiple paths. The packet disorder problem in a multipath transmission process is solved. The network throughput is improved. The network delayis reduced.

Description

technical field [0001] The invention relates to a multipath-based network coding transmission method in a software-defined FiWi network, and belongs to the technical field of optical fiber and wireless hybrid access networks. Background technique [0002] The unique architecture of Software Defined Network (SDN, Software Defined Network) which separates control and forwarding can realize centralized control of the network and bring great potential for network innovation. Fiber Wireless (FiWi, FiberWireless) hybrid network, as a "last mile" solution, combines the characteristics of large capacity and low power consumption of fiber access with the mobility and flexibility of wireless access to provide broadband users with more For great service. The multi-path transmission of network data can improve the utilization rate of network bandwidth resources and reduce network congestion by splitting data, synchronous transmission and data reorganization, but the out-of-sequence of ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L12/751H04B10/25H04L45/02
CPCH04B10/25H04L1/0015H04L1/0033H04L45/02
Inventor 刘心冯玉李文竹
Owner HEBEI UNIV OF ENG
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