Design and Development of Hybrid Time Synchronization Scheme to Mitigate the Phase and Frequency error for Asynchronous Link in Heterogeneous Network

The arbitrary deployment of HeNodeBs high-lights the importance of interference minimization in order to capture the best. Timing as well as synchronization are equally essential for control of HeNodeBs in 4G LTE devices. So as to sustain HeNodeBs for management, IEEE1588 master slave strategies are being used in order to maintain HeNodeBs for the control purpose. Nonetheless, as a result of poor internet connectivity for a long period HeNodeBs undergoes synchronization problems that leads to clock offset problem. Asymmetric link delays, due to phase and frequency misalignment causes the effects on interference and system QoS. Moreover, to mitigate interference and for QoS synchronization is prerequisite for heterogeneous network. This paper inspects the pros and cons of the IEEE 1588 algorithm and IEEE Precision Timing Protocol (PTP). Therefore, this paper proposed a hybrid phase and frequency synchronization scheme. Comparing to IEEE1588 and PTP, hybrid scheme can improve the clock Phase (offset), and frequency error in two-tier Heterogeneous Network. The proposed scheme is evaluated by Monte Carlo system level simulation, and the results are benchmarked with the existing techniques. The simulation outcome ensures that the hybrid time synchronization strategy is much better in Heterogeneous network with regards to phase (offset) and frequency errors