摘要
分析了无线多跳网络中链路调度机制与用户公平性和时延保证特性的关系.为保障多用户业务公平性,并减少用户的端到端时延,引入了"链路调度周期"和"链路跳数度"的概念.基于用户调度机会公平性最优化问题模型,通过寻求次优解的方案,提出了一种用户公平性与时延保证链路调度算法.算法充分考虑了无线多跳网络的空间复用和链路物理特性,保证了系统吞吐量性能.理论分析与仿真结果表明,该算法在保证一定系统吞吐量的前提下,可以有效提高用户公平性和端到端时延性能.
The relationship between link scheduling scheme and the performance of user fairness and delay guarantee is analyzed in details. In order to guarantee the user fairness and reduce end-to-end delay, the concept of "link scheduling periods" and "link hop degree" are introduced. One suboptimal user fairness and delay guarantee link scheduling algorithm is proposed based on the user fairness optimization problem model. To guarantee the performance of system throughput, both the spatial reuse and link quality are considered. Theoretical analysis and simulation show that the proposed algorithm can enhance the performance of user fairness and delay effectively with a certain system throughput guarantee.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2008年第2期38-41,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(60572120
60602058)
国家"973计划"项目(2007CB310602)
国家"863计划"项目(2006AA01Z257)
关键词
无线多跳网络
链路调度
系统吞吐量
用户公平性
时延
multi-hop wireless networks
link scheduling
system throughput
user fairness
delay