摘要
针对动态分配类时分多址接入协议的服务质量(QoS)问题,提出了集总式冲突消除算法,该算法通过递进结构可以将一帧内所有节点的冲突在控制时隙内完全予以消除,然后通过队列预留机制进行信道的分配,使节点在接入过程中满足先入先出的特性,提高了协议运行的公平性和稳定性,减小了节点的退避时延。另外,协议能够按照业务的级别重新调整节点的接入次序,实现了对实时业务的QoS保证。分析和仿真表明,采用新算法后,协议在接入效率、吞吐量和接入时延方面均呈现出良好的性能。
In order to achieve QoS guarantee in MANET, a new MAC protocol with conflict centralized sol ving method is put forward. It first eliminates all the conflicts in control slot then assigns channels to nodes using queue reservation mechanism. The protocol makes the node attain FIFO characteristic, and cuts down the back-off delay remarkably, by which it can enhance the fairness and stability of the MAP. In addition, the CCS QR protocol can adjust the access order according to different service, which can improve QoS guarantee. The analysis and simulation indicate the new protocol presents good performance on access efficiency, data through- put and access delay.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第5期1241-1245,共5页
Systems Engineering and Electronics
基金
国家"863"高技术研究发展计划基金资助课题(2006AA701121)
关键词
媒体接入控制协议
服务质量
冲突消除
队列预留
Media access control
quality of service
conflict centralized solving
queue reservation
