An Energy Efficient Cooperative Multicast Transmission Scheme with Power Control
An Energy Efficient Cooperative Multicast Transmission Scheme with Power Control
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DOI：
10.1109/glocom.2011.6133752
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
Nai Guan;Yiqing Zhou;Hang Liu;Lin Tian;Jinglin Shi
中科院分区：
文献类型：
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作者：
Nai Guan;Yiqing Zhou;Hang Liu;Lin Tian;Jinglin Shi
两阶段协作多播传输是一种很有前途的解决多播组中不同用户间信道衰落的方案，其中在第一阶段成功接收数据的用户可以作为中继将数据转发到第二阶段的其余用户。系统的吞吐量和总能耗都随着中继器数目的增加而增加。为了在系统吞吐量和能量消耗之间取得平衡，提出了一种能量有效的带功率控制的协作多播传输方案。在所提出的方案中，在第二阶段使用的继电器的数量是有限的约束总功耗。然后，根据最小SNR（信噪比）标准来选择优选的中继。仿真结果表明，与以往的协作多播传输相比，该方案通过控制总可用功率，实现了系统吞吐量和能耗之间的灵活折衷。此外，它总是可以实现更好的能源效率比现有的合作和传统的组播方案的吞吐量单位能耗。
The two-stage cooperative multicast transmission is a promising scheme to combat the channel fading of different users in a multicast group, where the users successfully receiving data at the 1st stage can serve as relays to forward the data to the rest of users at the 2nd stage. Both the system throughput and total energy consumption increase with the number of relays. To obtain a balance between the system throughput and energy consumption, this paper proposes an energy efficient cooperative multicast transmission scheme with power control. In the proposed scheme, the number of relays used at the 2nd stage is limited by constraining the total power consumption. Then, the preferred relays are chosen according to a minimum- SNR (Signal-to-Noise Ratio) criterion. It is shown by simulations that compared to previous cooperative multicast transmission, the proposed scheme achieves a flexible tradeoff between the system throughput and energy consumption by controlling the total available power. Moreover, it can always achieve better energy efficiency than the existing cooperative and conventional multicast schemes in terms of throughput per energy consumption.