Title :
Opportunistic Access with Random Subchannel Backoff (OARSB) for OFDMA Uplink
Author :
Chang, Yu-Jung ; Chien, Feng-Tsun ; Kuo, C. C Jay
Author_Institution :
Univ. of Southern California, Los Angeles
Abstract :
A distributed medium access control (MAC) algorithm for uplink OFDMA networks under the IEEE 802.16 framework is proposed and analyzed in this work. We present a simple yet efficient algorithm to enhance the system throughput by integrating opportunistic medium access and collision resolution through random subchannel backoff. Consequently, the resulting algorithm is called the opportunistic access with random subchannel backoff (OARSB) scheme. OARSB not only achieves distributed coordination among users but also reduces the amount of information exchange between the base station and users. The throughput and delay performance analysis of OARSB is conducted using a Markov chain model. The superior performance of OARSB over an existing scheme is demonstrated by analysis as well as computer simulation.
Keywords :
Markov processes; access protocols; broadband networks; frequency division multiple access; radio access networks; wireless channels; IEEE 802.16 framework; Markov chain model; OFDMA uplink; collision resolution; delay performance analysis; distributed coordination; distributed medium access control algorithm; information exchange; opportunistic access; random subchannel backoff; throughput analysis; Bandwidth; Base stations; Channel allocation; Downlink; Image processing; Performance analysis; Signal processing; Switches; Throughput; USA Councils;
Conference_Titel :
Global Telecommunications Conference, 2007. GLOBECOM '07. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-1042-2
Electronic_ISBN :
978-1-4244-1043-9
DOI :
10.1109/GLOCOM.2007.614