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학술대회 Efficient 2-D Mesh Election Algorithms for OFDMA-Based Wireless Mesh Networks
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신우람, 이안석, 김현재, 임광재, 권동승
International Conference on Signal Processing and Communication Systems (ICSPCS) 2011, pp.1-6
11PI2100, 차세대 기동노드간 적응형 무선메쉬 통신 시스템 연구개발, 권동승
Recently, wireless mesh networks (WMNs) have received enormous attention for wireless backbone network as well as sensor network due to its flexibility and cost-effectiveness in deployment. Particularly, IEEE 802.16-2004 based on time division multiple access (TDMA) with orthogonal frequency division multiplexing (OFDM) air interface supports mesh mode operation for last-mile connection to backhaul networks by means of distributed control functionalities. For the distributed operation, network and scheduling information is conveyed via control channels under a channel access protocol, named mesh election (ME). Meanwhile, in order to provide high data rate multimedia services, orthogonal frequency division multiple access (OFDMA) has been widely accepted by many proponents in the standardization parties such as 3GPP and IEEE 802.16. In these respects, we propose efficient two-dimensional ME protocols for OFDMA-based WMNs. The proposed protocols simply work by separating its procedure into two steps, subframe-and subchannel-level elections, which satisfy collision-free criteria for broadcast transmission and reception. Also, we suggest summation and product metrics for subchannel-level election, which have better performance in terms of transmission interval and resource utilization than that of independence metric by increasing the probability that a node succeeds in subframe- and subchannel-level elections subsequently. © 2011 IEEE.
KSP 제안 키워드
Access protocol, Air interface, Backhaul network, Channel Access(CA), Control channel, Cost-effectiveness, Distributed operation, Frequency division multiple access(FDMA), High data rate, IEEE 802.16-2004, Last mile