Wide-band TD-CDMA MAC with minimum-power allocation and rate- and BER-scheduling for wireless multimedia networks
Wide-band TD-CDMA MAC with minimum-power allocation and rate- and BER-scheduling for wireless multimedia networks
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DOI：
10.1109/tnet.2003.822663
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发表时间：
2004-02-01
影响因子：
3.7
通讯作者：
Wang, XD
中科院分区：
文献类型：
--
作者：
Wang, XD
介绍了一种宽带时分-码分多址（TD-CDMA）媒体接入控制（MAC）协议。提出了一种新的最小功率分配算法，以最小化码道所受到的干扰，从而满足多媒体业务的异构误码率（BER）要求。此外，从时隙的最大容量的分析，它的结论是，速率和BER调度是必要的，以达到最大容量。基于新的最小功率分配算法以及速率和BER调度的概念，提出了一种新的调度方案，以服务于不同时隙的异构BER和服务质量（QoS）要求的数据包。为了进一步提高MAC协议的性能，在新的最小功率分配算法的基础上开发了一种有效的连接接纳控制（CAC）算法。仿真结果表明，新的宽带TD-CDMA MAC协议满足多媒体业务的QoS要求，并实现了较高的整体系统吞吐量。
A wide-band time-division-code-division multiple-access (TD-CDMA) medium access control (MAC) protocol is introduced in this paper. A new minimum-power allocation algorithm is developed to minimize the interference experienced by a code channel such that heterogeneous bit-error rate (BER) requirements of multimedia traffic are satisfied. Further, from analysis of the maximum capacity of a time slot, it is concluded that both rate and BER scheduling are necessary to reach a maximum capacity. Based on the new minimum-power allocation algorithm as well as on rate and BER scheduling concepts, a new scheduling scheme is proposed to serve packets with heterogeneous BER and quality of service (QoS) requirements in different time slots. To further enhance the performance of the MAC protocol, an effective connection admission control (CAC) algorithm is developed based on the new minimum-power allocation algorithm. Simulation results show that the new wide-band TD-CDMA MAC protocol satisfies the QoS requirements of multimedia traffic and achieves high overall system throughput.