Hybrid Wireless-Optical Broadband Access Network(WOBAN): Topology Deployment And Optimization Study

Wireless-Optical Broadband Access Network (WOBAN) which is one of theeffective programs to solve the bottleneck of the access network has high-speedback-end optical access and flexible front-end wireless access, and it is the currentresearch focus.This paper’s research is for both WOBAN network deployment and energy-savingoptimization: study of the deployment of WOBAN network, which is a location-basedfeatures and adjacency matrix analysis deployment method of WOBAN network; studyof energy efficiency and routing algorithm, which contains the WOBAN domainconcept, the network state is defined as the states of the flow, whereby the routingalgorithm of the network is a state division of formula in order to reduce the energyconsumption of the network. Mainly as follows:1. Study the wireless routers deployment method, propose a new type of greedyalgorithm, test the connectivity of the router topology when the deployment of thewireless router is done, and force the rooter’s topology into a connected graph. Newgreedy algorithm is a algorithm which firstly take the user with the farthest distance andits farthest neighbor user into consideration, the algorithm can reduce the length of thefiber when we lay the ONUs; wireless router set maximum number of user accessnumber, ensure that the wireless router in addition to provide access for users, it alsocan provide data relay for other wireless routers. Force wireless router topology into aconnected graph can ensure that all users can still perform data communication in thenetwork when a ONU failure.2. Study the ONUs deployment method, use the idea of transformation and theknowledge of the matrix. Transform the ONU position (to cover more routers within acircle which take ONU communication range as the radius) into a position of near thewireless router which has maximum neighboring routers. Whenever the position of anONU is found, all wireless routers which are covered by the ONU will be removed fromthe adjacency matrix, to avoid a wireless router being covered by two ONU. Throughthese two methods, the heavy load of a router and network congestion will be avoided happening.3. Study the network the dormant energy saving agreement, our innovative use ofthe concept of domain innovatively proposed a will WOBAN divided into multipledomains. This field in accordance with the router to the ONU hop number is divided,and after the failure of an ONU, the network can spontaneously reestablish domains.4. Study the research network energy-saving sleep Agreement, use the networkstate-division routing algorithm. At the high-traffic-flow state, data can only beefficiently transmitted within the domain, the router is responsible for calculating thepath; at the low-traffic-flow state, data can be transmitted in cross-domain forenergy-saving, the OLT is responsible for calculating the path.