arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1105.0476cs.ITmath.IT
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可变比特率存储视频的下行链路功率分配

Downlink Power Allocation for Stored Variable-Bit-Rate Videos

Yingsong Huang, Shiwen Mao, Yihan Li

摘要:

在本文中,我们研究了蜂窝网络下行链路中多个可变比特率(VBR)视频流的功率分配问题。我们考虑一个确定性模型的VBR视频流量和有限的播放缓冲区在移动用户。我们的目标是推导出最佳的下行链路功率分配的VBR视频会话,使得视频数据可以在不引起播出缓冲区上溢和下溢的情况下,以及时的方式交付。该问题是一个非线性非凸优化问题。我们分析了凸性条件的制定问题,并提出了一个两步贪婪的方法来解决这个问题。我们还开发了一个分布式算法的基础上的对偶分解技术。所提出的算法的性能进行了验证与仿真使用VBR视频轨迹在现实场景下。

英文摘要:

In this paper, we study the problem of power allocation for streaming multiple variable-bit-rate (VBR) videos in the downlink of a cellular network. We consider a deterministic model for VBR video traffic and finite playout buffer at the mobile users. The objective is to derive the optimal downlink power allocation for the VBR video sessions, such that the video data can be delivered in a timely fashion without causing playout buffer overflow and underflow. The formulated problem is a nonlinear nonconvex optimization problem. We analyze the convexity conditions for the formulated problem and propose a two-step greedy approach to solve the problem. We also develop a distributed algorithm based on the dual decomposition technique. The performance of the proposed algorithms are validated with simulations using VBR video traces under realistic scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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