Green WOBAN: A Review

Meetu Singh, Vandana Sharma, Roshan Jain

With the increase of bit-rate requirements in access networks, future-proof access technologies should be energy efficient. This paper first presents an architecture and a vision for the WOBAN and articulates why the combination of wireless and optical presents a compelling solution that optimizes the best of both worlds. We recapitulate the design techniques dedicated to build “green” hybrid access network for a high throughput and low energy consumption. We devise novel energy saving techniques on a access network paradigm, called wireless optical broadband access network (WOBAN).The hybrid WOBAN is a promising architecture for future access networks. Recently the wireless part of WOBAN has been gaining increasing attention, and early versions are deployed because of low energy efficiency and lack of service quality. This architecture saves on network deployment cost because the fiber need not to penetrate each end-user, and it extends the reach of optical access solutions. To develop a green WOBAN, it is important to focus on reducing its power consumption, and in this work, we present an efficient resource management technique for WOBAN that reduces the power consumption of the optical line terminal (OLT) and optical network unit (ONU) by introducing sleep modes for the OLT and ONU, based on the service class and traffic load. We can conclude that there are large scopes of energy saving if we incorporate energy saving design and routing in access networks.