Cross-Layer Design Using Superposition Coding Scheme for Multiuser OFDM Systems

被引：0
作者：
Kalpana Goyal
Aditya Trivedi
机构：
[1] Maulana Azad National Institute of Technology,
[2] ABV—Indian Institute of Information Technology and Management,undefined
来源：
Wireless Personal Communications | 2013年 / 71卷
关键词：
Cross-layer design; OFDM; Dynamic resource allocation; Superposition coding; Packet scheduling; Quality of service (QoS);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, a cross-layer design is proposed for downlink of orthogonal frequency division multiplexing systems which uses superposition coding (SC) scheme. SC theorem allows two users to share the same subchannel. Firstly, the subchannel will be allocated to degraded user (who is far away from the base station) and then this subchannel will be allowed to be shared by potential user (who is near to the base station). We also employed a packet dependent scheduling at the medium access control layer which decides the transmission order of packets according to the delay, size and quality of service priority level of packets. The weight of each user can be calculated by summing up the weights of all packets in the queues of that user. We have considered that each user is having multiple heterogeneous traffic queues. Simulation results show that the algorithm proposed in this paper is better than the previously reported algorithm in terms of total throughput and packet delay with the same computational complexity.
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页码：1339 / 1352
页数：13
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