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.
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.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2016年第2期6-12,共7页
Journal of Xidian University
基金
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)
关键词
认知无线网络
跨层资源分配
多网卡传输
视频传输
cognitive radio network
cross-layer resource allocation
multi-radio transmission
video transmissions
