Power Saving Mechanisms for NR Sidelink Communication

The evolution of wireless communication technology provides users with higher performance, especially the generation of 5G NR allows greater bandwidth and higher data rate to meet higher service requirements. However, in the context of a high rate, there is greater energy consumption, especially the user equipment at the receiving end is more seriously affected. In addition, NR technology still provides sidelink communication to support V2X services, in which power saving is particularly important. For example, pedestrian-side devices in V2P communication links often have low battery capacity. How to save energy 3GPP has proposed some measures to deal with this problem, and corresponding technologies have also been added to NR sidelink to reduce power consumption. Therefore, based on this, this paper introduces in detail the power saving technologies that can be applied in NR sidelink, include discontinuous reception (DRX), partial sensing and bandwidth part (BWP) and gives the problems that need to be considered in the application of these technologies. To the best of the authors' knowledge, this is the first research paper focusing on power saving under NR sidelink. In this work, in addition to providing a basic description, it also provides a basic result graph in the DRX part.