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

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 1. 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 2, 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.