混合D2D蜂窝网络中基于模拟退火算法的资源调度策略

Resource scheduling strategy based on simulated annealing algorithm in hybrid D2D cellular networks

D2D通信是未来5G网络中一种近距离直通通信方式,在通信过程中,信息直接由发送端传给接收用户,而不需要经过基站的转发。在传统蜂窝网络中引入D2D通信可以极大地提升系统的总吞吐量、增大频谱资源的利用率以及降低发射终端的功耗。主要介绍了一种适用于混合D2D蜂窝网络中的资源分配方法,通过拉格朗日乘子法结合模拟退火算法实现频谱资源的分配,提出一种同时考虑信道容量和能耗的基于模拟退火算法的资源调度策略。本算法在维也纳仿真平台上经仿真验证,相比于传统贪婪优化算法,可以明显增大系统总吞吐量和频谱资源利用率。另外,算法中采用了分布式资源调度方法,D2D用户根据算法步骤自行搜索适合的目标信道并计算其发射功率,可以有效减少基站的信令开销。

D2D communication is a short distance communication mode in the future 5G network. In the process of communication, the information is transmitted from the sender to the receiver directly, without the need to transmit through the base station. The introduction of D2D communication in the traditional cellular network can greatly im- prove the total throughput of the system, increase the utilization of spectrum resources and reduce the power con- sumption of the transmitter. A resource allocation method which was used in hybrid D2D cellular network was mainly introduced, spectrum resources was distributed by Lagrange multiplier method combined with simulated an- nealing algorithm, a consideration of channel capacity and energy consumption of the resource scheduling strategy based on simulated annealing algorithm was put forward. This algorithm was simulated by the simulation platform in Vienna, compared to the traditional greedy optimization algorithm, it can significantly increase the total system throughput and bandwidth utilization and reduce the power consumption. In addition, the distributed algorithm was adopted, that D2D users searched for a suitable target channel and calculated their transmit power according to the algorithm steps, which reduced the signaling overhead of the base station.