异构多接入网并发传输的时延界分析及分流策略

doi:10.3969/j.issn.1001-2400.2013.02.002

J4 ›› 2013, Vol. 40 ›› Issue (2): 5-12.doi: 10.3969/j.issn.1001-2400.2013.02.002

异构多接入网并发传输的时延界分析及分流策略

马骁;盛敏;张琰

(西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071)

收稿日期:2011-11-14 出版日期:2013-04-20 发布日期:2013-05-22
作者简介:马骁(1984-)，男，西安电子科技大学博士研究生，E-mail: xiaoma@mail.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(60972048，61172079)；国家重点基础研究发展计划(973 计划)课题资助项目(2009CB320404)；教育部创新团队111资助项目(B08038)；国家重大专项资助项目(2010ZX03003-001，2011ZX03003-002-02); 国家重点实验室专项基金资助项目(ISN01080301)

Delay bound analysis and splitting strategies of concurrent transmission in heterogeneous networks

MA Xiao;SEHGN Min;ZHANG Yan

(State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071， China)

Received:2011-11-14 Online:2013-04-20 Published:2013-05-22

摘要/Abstract

摘要：

针对异构网络并发传输时分流策略如何使系统性能最大化的问题，建立了分析异构多接入网络并发传输端到端时延的等效排队论模型，并由此模型获得了并发传输系统的理论时延界．在此基础上，提出了多接入网间资源联合调度的分流策略，包括最短等待时延分流策略和统一队列管理分流策略．在两异构网络并发传输系统中，通过二维马尔科夫链对最短等待时延分流策略和统一队列管理分流策略的时延性能进行了分析．仿真结果表明，这两种分流策略在保证最优吞吐量不变的前提下有效地降低了系统的平均时延，在高负载情况下可逼近理论时延界．同时，最短等待时延分流算法可显著地降低并发传输的时延抖动．

关键词: 异构网络, 并发传输, 分流策略

Abstract:

We focus our attention on how to get optimal performance of concurrent transmission in heterogeneous networks. An equivalent queuing model is used to analyze the end-to-end delay performance of perfect splitting strategy with the theoretical delay bound found. Furthermore, two splitting algorithms, Minimum Queuing Delay based splitting strategy (MQD) and Unified Queuing Management Based Splitting Strategy (UQM), are presented based on the joint resources scheduled in different RATs (Radio Access Technology). In the two-RAT scenario, the two-dimensional discrete-state continuous-time Markov process is used to analyze our schemes with close-formed solutions found. Simulation results demonstrate that our proposed flow splitting strategies utilize the system resources efficiently and outperform current strategies, getting close to the theoretical delay bound especially in the heavy load region.

Key words: heterogeneous network, concurrent transmission, flow splitting strategy

马骁;盛敏;张琰. 异构多接入网并发传输的时延界分析及分流策略[J]. J4, 2013, 40(2): 5-12.

MA Xiao;SEHGN Min;ZHANG Yan. Delay bound analysis and splitting strategies of concurrent transmission in heterogeneous networks[J]. J4, 2013, 40(2): 5-12.

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异构多接入网并发传输的时延界分析及分流策略

Delay bound analysis and splitting strategies of concurrent transmission in heterogeneous networks

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