DCF的二进制指数退避算法的非均匀性研究

A Study of the Non-Uniform of the Binary Exponential Backoff Algorithm in DCF

在对IEEE 802.11 DCF的二进制指数退避算法的非均匀性进行严密分析的基础上,提出了一个详尽的使用马尔可夫链的分析模型来描述由BEBA控制的信道活动.为了降低计算复杂性,对该模型作了进一步的近似处理.模型的分析结果与仿真结果表明该分析模型能在更广泛的系统配置范围内更精确地刻画BEBA的特性.

In the paper,we perform an in-depth analytic study of the non-uniform of the Binary Exponential Backoff Algorithm（BEBA） that is used in IEEE 802.11 Distributed Coordinated Function（DCF）.We propose a detailed model with the use of a Markov chain to faithfully describe the channel activities governed by BEBA.To reduce the computational complexity,we simplify the model for an approximate one.The analytical results derived in the proposed model are compared with the simulation results and those obtained from two other representative models.It is demonstrated that the proposed model is an accurate characterization of the BEBA algorithm in a broader range of system configuration.