中文说明：
D2D通信在正常蜂窝和D2D模式之间的最佳模式选择。MCMC_k_user.m是要运行的主文件。这将输入用户数量、每个设备的功率、基站发射的功率和路径损耗指数，并生成不同用户的最佳模式选择图。剩下的两个文件只是为不同配置保存的工作空间。
English Description：
D2D-communication optimal mode selection between normal cellular and D2D mode. MCMC_k_user.m is the main file to be run. This takes the input for No. of users, Power of each device, power emitted by the base station and path loss exponent and generates a plot of the optimal mode selection for different users. The remaining two files are just saved workspaces for different configurations.