QoS Support Analysis of LTE Device Using Four State Markov Model Based DRX with OTSC for Power Efficient Bearer Services

The battery endurance of the user equipment device is enhanced by using discontinuous reception mechanism (DRX) in the long term evolution (LTE) networks. Configuring the DRX parameters for the power savings increases the packet loss ratio (PLR). Moreover, the increased PLR due to the delay bound violation by the DRX configuration severely affects the quality of service (QoS) for the bearer service users. Hence, the reduction in PLR and maintaining the QoS with optimized power savings provides a challenging task. In this work, an attempt has been made to analyse the PLR performance of LTE device by incorporating the on timer to short cycle (OTSC) ratio ‘α’ based power saving DRX mechanism approach on 3 state and 4 state Markov model. The QoS related issues are addressed by using the above mentioned proposed model. The European Telecommunications Standards Institute traffic pattern is adopted for the PLR analysis of OTSC based power saving DRX mechanism. The simulation is done by using MATLAB. The simulation results reveal that an improvement in the reduction of the PLR using proposed method is achieved compared to that of the existing regenerative cycle method. The analyses exhibits that by assigning α = 0.0625, proposed method achieves 14% of reduction in PLR for DRX long cycle of 512 ms, 45% of reduction in PLR for DRX short cycle timer and 19.6% reduction for100 ms of inactivity timer than that of existing method. Further the proposed method obtains 12.45% of reduction in the PLR at buffer packet size of 150 ms compared to that of existing method.