A wireless-optical broadband access network (WOBAN) is a combination of wireless and optical network segments to optimize the cost and performance of an access network. A WOBAN's optical backhaul enables it to support high capacity, while its wireless front end [also called a wireless mesh network (WMN)] enables its users to have untethered access. Wireless nodes collect traffic from end users and carry them to the optical part of a WOBAN, possibly using multiple hops, but the traffic also experiences delay at each wireless node. The finite radio capacity at each wireless node limits the capacity on each outgoing link from a wireless node of a WOBAN. Thus, delay and capacity limitation in the WMN of a WOBAN are major constraints. We design a capacity- and delay-aware routing scheme, called CaDAR, to minimize the delay and increase the throughput in the WMN of a WOBAN. Our analysis shows that CaDAR is an efficient routing scheme for WOBAN that can support much higher load and has lower system delay than other approaches (<i>IEEE Network</i>, vol. 22, no. 3, p. 20, 2008) because of better load-balanced routing.
© 2009 Optical Society of America
Original Manuscript: February 3, 2009
Revised Manuscript: July 30, 2009
Manuscript Accepted: July 30, 2009
Published: September 18, 2009
Abu (Sayeem) Reaz, Vishwanath Ramamurthi, Suman Sarkar, Dipak Ghosal, Sudhir Dixit, and Biswanath Mukherjee, "CaDAR: An Efficient Routing Algorithm for a Wireless-Optical Broadband Access Network (WOBAN)," J. Opt. Commun. Netw. 1, 392-403 (2009)