用于高清视频通话的合作中继算法的研究
首发时间:2015-01-06
摘要:智能手机已经普遍安装了高清摄像头,因此越来越多的手机用户会通过视频与人沟通。但现有的网络服务,由于其较低的上行传输速率,满足不了高清视频通话的需求。为了克服这样的限制,本文提出了通过认知无线电网络中采用用户合作模式完成上行链路传输。将视频流根据H.264/SVC协议分成若干子流,并根据文章提出的多重停止选择策略选择合适的中继用户,通过合作中继,完成视频流的传输。仿真结果证明文章提出的策略可以满足720P视频通话的传输需求。
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The Research of cooperative relay selection for HD Video Chats
Abstract:Smartphones have been equipped with the cameras that can shoot HD videos, therefore, intuitively predict the trend that users are expecting to enjoy HD video chats via utilizing their smartphones. Most of the current Internet services, however, cannot support the live HD video transmissions because of their low uplinkrate. In order to overcome this limit, we propose to offload the uplink transmissions to cooperative users via Cognitive Radio Networks. Specifically, we divide the video stream into several substreams according to the H.264/SVC standard and the cooperative users' uplink rates. Then, the cooperative users are elected by employing our proposed optimal multiple stopping method. The simulation results demonstrate that our proposed scheme can successfully support 720P HD video chats
Keywords: Wireless communication cooperative relay selectio Cognitive Radio Networks
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No.4626008102046714****
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