ADAPTIVE RESOURCE ALLOCATION TECHNIQUES IN OFDMA USING CROSS-LAYER ARCHITECTURE  

作　　者：Yang Xiang Wei Gang 

机构地区：[1]Dept of Electronic and Information Eng., South China University of Tech., Guangzhou 510640, China

出　　处：《Journal of Electronics(China)》2005年第6期586-593,共8页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.60072048) the Doctoral Program Fund of Ministry of Education of China (No.20010561007).

摘　　要：This paper utilizes the cross-layer architecture to implement adaptive resource allocation in Orthogonal Frequency Division Multiple Access （OFDMA） based on the broadband wireless access system. According to the cross-layer architecture, the information in link layer is used for adaptive resource allocation in OFMDA. A new cross-layer adaptive resource allocation algorithm is developed which can guarantee the users to be in minimum average waiting time in link-layer and get the better spectrum utilization. Numerical results show that our scheme is appealing and can get about half of average waiting time less and 0.5 bps/Hz spectrum utilization more than the scheme in 1EEE802.16a.This paper utilizes the cross-layer architecture to implement adaptive resource allocation in Orthogonal Frequency Division Multiple Access (OFDMA) based on the broadband wireless access system. According to the cross-layer architecture, the information in link layer is used for adaptive resource allocation in OFMDA. A new cross-layer adaptive resource allocation algorithm is developed which can guarantee the users to be in minimum average waiting time in link-layer and get the better spectrum utilization. Numerical results show that our scheme is appealing and can get about half of average waiting time less and 0.5 bps/Hz spectrum utilization more than the scheme in IEEE802.16a.

关 键 词：Broadband Wireless Access （BWA） CROSS-LAYER Orthogonal Frequency Division Multiple Access （OFDMA） Quality of Service （QoS） Adaptive resource allocation 

分 类 号：TN929.5[电子电信—通信与信息系统]