Cross-layer design for radio resource allocation based on priority scheduling in OFDMA wireless access network

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題名:	Cross-layer design for radio resource allocation based on priority scheduling in OFDMA wireless access network
作者:	Chen,YW;Chen,CW;Lin,YS
貢獻者:	通訊工程學系
關鍵詞:	SYSTEMS;SUPPORT
日期:	2011
上傳時間:	2012-03-27 18:54:41 (UTC+8)
出版者:	國立中央大學
摘要:	The orthogonal frequency-division multiple access (OFDMA) system has the advantages of flexible subcarrier allocation and adaptive modulation with respect to channel conditions. However, transmission overhead is required in each frame to broadcast the arrangement of radio resources to all mobile stations within the coverage of the same base station. This overhead greatly affects the utilization of valuable radio resources. In this paper, a cross layer scheme is proposed to reduce the number of traffic bursts at the downlink of an OFDMA wireless access network so that the overhead of the media access protocol (MAP) field can be minimized. The proposed scheme considers the priorities and the channel conditions of quality of service (QoS) traffic streams to arrange for them to be sent with minimum bursts in a heuristic manner. In addition, the trade-off between the degradation of the modulation level and the reduction of traffic bursts is investigated. Simulation results show that the proposed scheme can effectively reduce the traffic bursts and, therefore, increase resource utilization.
關聯:	EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
顯示於類別:	[通訊工程學系] 期刊論文

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