Parameter-Adaptive Dynamic and Adjustable DRX Schemes for LTE/LTE-A

Abstract

In LTE/LTE-A, the discontinuous reception (DRX) was originally defined to save power for a user equipment (UE). To exhibit flexibility, two dynamic and adjustable DRX (DADRX) schemes, i.e., DADRX- m and P-DADRX, were designed in the literature. However, they cannot work adaptively according to some preset goals, for example, delay or power constraints. To achieve such goals, the DADRX with adaptive parameters (DADRX-AP) schemes are further proposed in this paper based on DADRX- m. These DADRX-AP schemes allow UEs to pose their constraints on delay or power consumption and the evolved node B (eNB) is able to estimate the packet arrival rate and find feasible parameters for UEs in an iterative manner so that the constraints can be satisfied. Obviously, the delay-constrained or power-constrained features as well as adaptive parameters make our proposed DADRX-AP schemes more practical than DADRX- m , CDA-DRX, and the original DRX in LTE/LTE-A. Via simulations, we successfully demonstrate that our proposed DADRX-AP schemes can set suitable parameters to meet the preset constraints with an acceptable convergence rate.