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随着移动通信的不断发展,5 GHz以下带宽分配已经十分拥挤,由于可用于移动通信的频谱资源有限,为满足无线通信发展的需要,可以用终端直通技术(D2D,Device-to-Device)来提高频谱利用率,并可以减少和基站通信的负担,这是新一代无线通信发展的趋势。但是在D2D通信系统中所选择的模式是十分关键的问题。这里给出了蜂窝模式和直通模式这2种通信模式,为了能更好地选择D2D的工作模式,通过仿真比较了这2种模式性能的优劣。
With the continuous development of mobile communications, bandwidth allocation below 5 GHz is already very crowded. Due to limited spectrum resources available for mobile communications, to meet the needs of the development of wireless communications, D2D (Device-to-Device) Improve spectrum utilization, and reduce the burden of communication with the base station, which is the trend of the new generation of wireless communications. However, the mode selected in the D2D communication system is a very crucial issue. Here are two modes of communication, cellular mode and direct mode. In order to better select the working mode of D2D, the performance of these two modes is compared by simulation.