一种联合D2D资源分配的中继选择算法的研究

为提高蜂窝网络中边缘用户的QoS,可在蜂窝网络中引入了D2D辅助中继技术,然而由于D2D链路复用蜂窝资源会与蜂窝链路之间产生同频干扰,为了降低这种干扰,提出了一种联合资源分配的中继选择算法,该算法首先使用一种资源分配策略,使得D2D链路对蜂窝链路产生的干扰最小,然后结合资源分配结果提出了一个中继选择方案,该方案不仅考虑了D2D链路和回程链路的信道质量,而且还同时考虑到了对蜂窝链路的干扰问题。通过仿真验证,本文所提出的算法不仅能有效提升边缘用户吞吐量,同时保证了中心用户的QoS。

Joint D2D Resources Allocation and Relay Selection Algorithm for the Cell Edge Users in LTE

Device-to-Device (D2D) communication underlying cellular networks could use direct communication between devices as a relay strategy for coverage extension. We considered such a D2D-relaying approach in a scenario where there were multiple candidate devices to be selected as relays. It could cause interference between D2D links and cellular links because of resource ruse. In order to reduce the impact of interference, we proposed an algorithm of jointing D2D resources allocation and relay selection for the cell edge users in LTE. Adopting a resource allocation scheme could get minimum interference between D2D links and cellular links. Then proposed a simplified relay selection based on the resource allocation scheme. This scheme not only considered the channel quality of the D2D link and the backhaul link, but also taken into account the interference of users. Using this scheme in a system simulation, we demonstrate the algorithm increases the throughput of cell-edge users significantly and guarantees QoS of central users.