On Minimizing Delay with Probabilistic Splitting of Traffic Flow in Heterogeneous Wireless Networks  

作　　者：ZHENG Jie LI Jiandong LIU Qin SHI Hua YANG Xiaoniu 

机构地区：[1]No.20 Research Institute of China Electronics Technology Group Corporation, Xi'an 710071, China [2]State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, China [3]No.36 Research Institute of China Electronics Technology Group Corporation, Jiaxing 314001, China

出　　处：《China Communications》2014年第12期62-71,共10页中国通信（英文版）

基　　金：ACKNOWLEDGEMENT This work was supported by National Natural Science Foundation of China （Grant No. 61231008）, National Basic Research Program of China （973 Program） （Grant No. 2009CB320404）, Program for Changjiang Scholars and Innovative Research Team in University （Grant No. IRT0852）, and the 111 Project （Grant No. B08038）.

摘　　要：In the paper,we propose a framework to investigate how to effectively perform traffic flow splitting in heterogeneous wireless networks from a queue point.The average packet delay in heterogeneous wireless networks is derived in a probabilistic manner.The basic idea can be understood via treating the integrated heterogeneous wireless networks as different coupled and parallel queuing systems.The integrated network performance can approach that of one queue with maximal the multiplexing gain.For the purpose of illustrating the effectively of our proposed model,the Cellular/WLAN interworking is exploited.To minimize the average delay,a heuristic search algorithm is used to get the optimal probability of splitting traffic flow.Further,a Markov process is applied to evaluate the performance of the proposed scheme and compare with that of selecting the best network to access in terms of packet mean delay and blocking probability.Numerical results illustrate our proposed framework is effective and the flow splitting transmission can obtain more performance gain in heterogeneous wireless networks.In the paper,we propose a framework to investigate how to effectively perform traffic flow splitting in heterogeneous wireless networks from a queue point.The average packet delay in heterogeneous wireless networks is derived in a probabilistic manner.The basic idea can be understood via treating the integrated heterogeneous wireless networks as different coupled and parallel queuing systems.The integrated network performance can approach that of one queue with maximal the multiplexing gain.For the purpose of illustrating the effectively of our proposed model,the Cellular/WLAN interworking is exploited.To minimize the average delay,a heuristic search algorithm is used to get the optimal probability of splitting traffic flow.Further,a Markov process is applied to evaluate the performance of the proposed scheme and compare with that of selecting the best network to access in terms of packet mean delay and blocking probability.Numerical results illustrate our proposed framework is effective and the flow splitting transmission can obtain more performance gain in heterogeneous wireless networks.

关 键 词：traffic flow splitting heterogeneous wireless networks multi-radio access packet delay 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术] TN929.53[自动化与计算机技术—计算机科学与技术]