西安电子科技大学学报 ›› 2016, Vol. 43 ›› Issue (2): 6-12.doi: 10.3969/j.issn.1001-2400.2016.02.002

• 研究论文 • 上一篇    下一篇

认知无线网络中视频传输的资源分配方案

龙彦;李红艳   

  1. (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:2014-12-10 出版日期:2016-04-20 发布日期:2016-05-27
  • 通讯作者: 龙彦
  • 作者简介:龙彦(1988-),女,西安电子科技大学博士研究生,E-mail:ylong@stu.xidian.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(91338115,61231008);国家科技重大专项资助项目(2011ZX03005-004, 2011ZX03004-003, 2013ZX03004007-003);陕西省"13115"科技创新工程资助项目(2010ZDKG-26);国家重点基础研究发展计划(973计划)资助项目(2009CB320404);长江学者和创新团队发展计划资助项目(IRT0852)

Resource allocation scheme for video transmissions in cognitive radio networks

LONG Yan;LI Hongyan   

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China)
  • Received:2014-12-10 Online:2016-04-20 Published:2016-05-27
  • Contact: LONG Yan

摘要:

讨论了多网卡场景下,次用户在认知无线网络中视频传输的跨层资源分配问题.考虑到网卡与信道的耦合关系,提出了基于链路-网卡-信道的冲突干扰图,并对资源分配问题进行优化建模.模型的约束条件保证了无干扰无冲突的视频传输,且能够根据可伸缩编码视频业务的特点,为各业务提供路由选择及速率分配,模型的目标函数实现了基于公平考虑的网络吞吐量最大化.仿真结果表明,多网卡传输能够为视频业务提供更高的吞吐量,所提方案能够在保证公平性的同时,根据视频业务特点有效地利用网络资源,实现业务间的按需合理分配.

关键词: 认知无线网络, 跨层资源分配, 多网卡传输, 视频传输

Abstract:

Considering SUs with multiple radios, this paper discusses the cross-layer resource allocation problem for video transmissions in cognitive radio networks. Because of the coupling relationship between radio and channel, this paper proposes a new conflict graph based on the link-radio-channel, and models the resource allocation problem into an optimization problem. The constraints ensure the conflict-free and interference-free video transmissions, and provide flow routing and rate allocation for video services based on the feature of scalable video coding streams. The objective function achieves the network-level throughput maximization with fairness consideration. Simulation results show that the multi-radio transmission could gain a higher throughput. Also, the proposed scheme could provide fairness resource allocation, and use resource efficiently based on the feature of video services.

Key words: cognitive radio network, cross-layer resource allocation, multi-radio transmission, video transmissions

中图分类号: 

  • TN929.5