Robust Pre-Grant Signaling for Energy-Efficient 5G and beyond Mobile Devices

Mobile device batteries have severely limited capacities, due to constraints on size and weight of mobile devices. Therefore, energy efficiency of mobile devices plays an important role in their usability. Different power measurement studies show that cellular subsystem of mobile device is one of the major contributors to its energy consumption. Thus, reducing energy consumption of cellular subsystem is paramount. In this paper, a new concept of pre-grant message for control plane is introduced, aiming to reduce energy consumption of cellular subsystem in downlink, while discontinuous reception is activated. Performance of the proposed scheme in terms of false alarm and misdetection are investigated, and evaluated in AWGN and Rayleigh fading channel. The obtained numerical results show that such a signaling can reduce power consumption of mobile device by up to 70% for bursty data applications, at the cost of negligible increments in signaling overhead.