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首页> 外文期刊>Wireless Communications, IEEE Transactions on >Distributed Power Allocations in Heterogeneous Networks With Dual Connectivity Using Backhaul State Information
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Distributed Power Allocations in Heterogeneous Networks With Dual Connectivity Using Backhaul State Information

机译：具有回程状态信息的双连接的异构网络中的分布式电源分配

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Long Term Evolution (LTE) release 12 proposes the use of dual connectivity in heterogeneous cellular networks, where a user equipment (UE) maintains parallel connections to a macrocell base station and to a low-tier node such as a picocell base station or relay. In this paper, we propose distributed multi-objective power control where each UE independently adapts its transmit power on its dual connections, where the uplinks could be of unequal bandwidth and have non-ideal backhaul links. In the proposed optimization, the UEs dynamically switch between data rate maximization and transmit power minimization as the backhaul load varies. To address the coupling between interference and the backhaul load, we propose a low-overhead convergence mechanism which does not require explicit coordination between UEs and also derive a closed-form expression of the transmit power levels at equilibrium. Simulation results show that our scheme achieves higher aggregate end-to-end data rate and significant power saving in comparison to a scheme that employs a greedy algorithm and a scheme that employs only waterfilling.
机译：长期演进（LTE）版本12建议在异构蜂窝网络中使用双连接，其中用户设备（UE）维护与宏小区基站和与低层节点（如微微小区基站或中继站）的并行连接。在本文中，我们提出了分布式多目标功率控制，其中每个UE在其双连接上独立地调整其发射功率，其中上行链路的带宽可能不相等，并且具有非理想的回程链路。在所提出的优化中，当回程负载变化时，UE在数据速率最大化和发射功率最小化之间动态切换。为了解决干扰和回程负载之间的耦合问题，我们提出了一种低开销的收敛机制，该机制不需要UE之间的显式协调，而且还可以得出平衡时的发射功率水平的闭式表达式。仿真结果表明，与采用贪婪算法的方案和仅采用注水方案相比，我们的方案可实现更高的端到端总数据速率和显着的节能效果。

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