西安电子科技大学综合业务网理论与关键技术国家重点实验室,西安,710071
网络首发:2014-08-10,
纸质出版:2014
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李建东 1, 郑杰 1, 刘勤 1, 等. 异构协作网络中采用令牌漏桶的多接入业务分配算法[J]. 西安交通大学学报, 2014,48(8):7-11+35.
A Token Bucket Based Traffic Allocation Algorithm for Multi-Radio Access System in Heterogeneous Collaboration Networks[J]. 2014, 48(8): 7-11+35.
李建东 1, 郑杰 1, 刘勤 1, 等. 异构协作网络中采用令牌漏桶的多接入业务分配算法[J]. 西安交通大学学报, 2014,48(8):7-11+35. DOI: 10.7652/xjtuxb201408002.
A Token Bucket Based Traffic Allocation Algorithm for Multi-Radio Access System in Heterogeneous Collaboration Networks[J]. 2014, 48(8): 7-11+35. DOI: 10.7652/xjtuxb201408002.
针对异构协作网络中业务突发性引起拥塞的问题
提出一种基于令牌漏桶的多接入业务分配(TATB)算法。该算法首先通过在城域网中加入令牌漏桶来限制和平滑业务的突发性
将令牌漏桶看作一个离散时间的马尔科夫链
得到第1跳的平均传输时延
将第2跳看作服务时间服从指数分布的队列模型
得到系统的平均时延
然后以系统平均时延最小化为目标
以队列的稳定性作为约束条件
构建了优化问题
并证明该问题为凸问题
最后通过拉格朗日对偶分解
采用牛顿投影法调整业务的分配
用梯度投影法调节分配业务的价格因子。仿真结果表明:TATB算法不仅可以获得更小的系统时延
而且需要迭代的次数少
减少了系统的信令开销
便于实现; TATB算法的时延仅分别是未考虑令牌漏斗算法、负载均衡算法和基于路径等分配算法时延的28%、27%和24%。
A traffic allocation scheme based on token bucket(TATB)for multi-radio access system is proposed to manage the congestion problem caused by burst traffic in heterogeneous collaboration networks. The token buckets are used in the wireless metropolitan area networks to limit and to smooth the burstiness of traffic. The token buckets are regarded as a Markov chain of discrete time to compute the average delay of first-hopes and the second-hopes are considered as a queue model with the service time following an exponential distribution
so that the system average delay can be obtained. Then
a constrained optimization problem is formulated to minimize the system delay with the constraint of queue stability
and it is proved that the problem is convex. The Lagrangian dual decomposition methodology and the Newton projection algorithm are used to obtain the traffic allocation and the gradient projection algorithm is used to get the price of allocated traffic. Simulation results show that the TATB algorithm is low overhead and easy to implement
and that less delay is obtained. Moreover
the delay performance of the TATB algorithm is only about 28%
27% and 24% the delay performance of the non-TATB algorithm
the load balancing approach and the equal traffic allocation in different path.
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李建东,姜建,刘鑫一.采用时延限制和资源预测的异构无线网络选择策略.2014,48(2):74-79.[doi:10.7652/xjtuxb 201402013]
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司江勃,李赞,刘增基.无线协作网络中存在干扰时的中继选择协议.2010,44(2):72-76.[doi:10.7652/xjtuxb201002015]
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魏全瑞,刘俊,韩九强.改进的无线传感器网络无偏距离估计与节点定位算法.2014,48(6):1-6.[doi:10.7652/xjtuxb 201406001]
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