Tabu-Search-Based Metaheuristic Resource-Allocation Algorithm for SVC Multicast Over Wireless Relay Networks

Tabu-Search-Based Metaheuristic Resource-Allocation Algorithm for SVC Multicast Over Wireless Relay Networks
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基于禁忌搜索的无线中继网络SVC组播元启发式资源分配算法

DOI:
10.1109/tvt.2014.2318333
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发表时间:
2015
影响因子:
6.8
通讯作者:
Zhao Baohua
Zhao Baohua
中科院分区:
计算机科学2区
文献类型:
--
作者:
Zhou Hao;Ji Yusheng;Zhao Baohua

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可扩展视频编码(SVC)是一种很有前途的视频组播技术,可以向具有不同可用传输容量的用户进行视频组播。另一方面,自适应调制编码(AMC)方案为更好地利用无线网络资源提供了一种有效的方法。然而,由于中继站的存在,在无线中继网络上支持SVC组播的资源分配问题是一个具有挑战性的问题。本文通过假设每个基站(BS)/RS中分配给较低视频层的调制和编码方案(MCSs)的覆盖面积等于或优于分配给较高视频层的调制和编码方案,简化了资源分配问题。讨论了简化问题的最优解及其与定向运动问题的关系。然后,我们提出了一种基于禁忌搜索(TS)的元启发式算法来处理该问题,该算法已被证明是一种有效的op算法。仿真结果表明,在两跳无线中继网络或中继和接入链路分离传输的假设下,该算法优于其他算法,并且保持了较好的逼近最优结果。
Scalable video coding (SVC) is a promising technology for video multicast to users with different available transmission capacities. On the other hand, adaptive modulation and coding (AMC) schemes provide an efficient way to better utilize wireless network resources. However, the resource-allocation problem to support SVC multicast over wireless relay networks is a challenging one due to the existence of relay stations (RSs). We simplify the resource-allocation problem in this paper by assuming that the modulation and coding schemes (MCSs) assigned to lower video layers have equal or better coverage area than that assigned to higher video layers at each base station (BS)/RS. We discuss the optimal solution to the simplified problem and its relation with the orienteering problem (OP). Then, we propose a tabu search (TS)-based metaheuristic algorithm for dealing with the problem, which has been proven to be an effective and efficient algorithm for OP. The simulation results reveal that the proposed algorithm outperforms other algorithms under the assumptions of two-hop wireless relay networks or separated transmissions for the relay and access links, and it maintains a good approximation to the optimal results.
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