Utility-Based Optimized Cross-Layer Scheme for Real-Time Video Transmission Over HSDPA

Utility-Based Optimized Cross-Layer Scheme for Real-Time Video Transmission Over HSDPA
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基于实用程序的 HSDPA 实时视频传输优化跨层方案

DOI:
10.1109/tmm.2015.2456506
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发表时间:
2015-07
影响因子:
7.3
通讯作者:
Yang, Jian
Yang, Jian
中科院分区:
计算机科学1区
文献类型:
--
作者:
Deng, Rui;Liu, Guizhong;Yang, Jian

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在本文中,我们首先建立了一个准确的和通用的传输失真模型的H.264/AVC视频流来估计每个包的重要性。然后,研究了一种基于效用的HSDPA实时视频传输跨层资源优化分配、MCS选择和分组调度算法。这里的效用指的是分组效用,其被定义为分组紧急性和分组重要性的函数。在每个TTI中首先发送具有更大效用值的分组可以为用户提供更高级别的视频质量。因此,我们制定了一个优化问题,其目标是最大限度地提高聚合数据包的效用在所有用户的HSDPA物理资源的限制。为了获得最优的传输策略,提出了一种基于动态规划的跨层算法(DPCLA)。鉴于其高复杂度,我们进一步开发了一个基于贪婪的跨层算法(GCLA),以找到一个次优的解决方案。仿真结果表明,提出的基于效用的跨层优化方案,包括所提出的传输失真模型以及DPCLA和GCLA算法,可以提供比现有HSDPA视频传输方案更高的接收视频质量。
In this paper we first build an accurate and general transmission distortion model for H.264/AVC video streams to estimate the importance of each packet. Then, a utility-based optimized cross-layer resource allocation, MCS selection, and packet scheduling algorithm for real-time video transmission over HSDPA is studied. The utility here refers to the packet utility which is defined as a function of the packet urgency and the packet importance . Transmitting the packets with greater utility values firstly in each TTI can provide a higher level of video quality for the users. Thus, we formulate an optimization problem with the objective of maximizing the aggregate packet utility over all the users under the HSDPA physical resource constraints . In order to obtain an optimal transmission strategy, a dynamic programming -based cross-layer algorithm (DPCLA) is proposed. In view of its high complexity, we further develop a greedy-based cross-layer algorithm (GCLA) to find a suboptimal solution. Simulation results show that the proposed utility-based optimized cross-layer scheme, including the proposed transmission distortion model and the algorithms of DPCLA and GCLA, can provide higher received video quality than the existing ones for video transmission over HSDPA.
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