摘要
在多跳无线网中 ,MAC(media access control)层的公平性虽然是一个局部特性 ,但影响网络的整体性能。后退算法是制约 MAC层公平性的关键之所在 ,Bharghavan等人通过试验方法提出了 MIL D算法 ,试验结果表明 MIL D算法的公平性比 BEB算法好 ,但作者没有进行理论分析。本文给出了分析后退算法的简单模型 ,并根据公平性约束、有效性约束和分布性约束给出 MIL D算法的理论分析。
Although the fairness of MAC layer is a local performance in multihop wireless networks, it affects the overall performance. Back off algorithm is the key component to realize the fairness. Bharghavan, et al, proposed a new algorithm MILD( multiplicative increase and linear decrease) by using experiment method, and the experiment results show that it has higher fairness than BEB(binary exponential back off). The author did not give the theoretical analysis of the MILD. However, this paper gives a simple model for analysis MAC layer back off algorithm under the constraints of fairness, efficiency and distributiveness.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2000年第6期72-75,共4页
Journal of the China Railway Society
