REDUCING THE EFFECTS OF PING-PONG HANDOVER IN INTRA-LTE NETWORKS USING FUZZY LOGIC


Abstract in English

Improving system performance in terms of data rate, latency, mobility and cost is the scope of Long Term Evolution (LTE) system. All IP architecture with distributed mobility management that have been implemented in LTE and the handover (HO) decision is performed by the evolved base station (eNB). The ping-pong movement in LTE is one of the most crucial problems which reduce the performance of the HO. In this paper, the impact of ping-pong handover on inter eNB handover in LTE networks is investigated. The object of the present work is to provide a method for reducing the number of ping-pong HOs in intra E-UTRA networks. A novel HO algorithm, based on keeping the old path between the source eNB and SGW/MME during the ping-pong movement and delaying the completion HO part, is presented. The ping-pong avoidance algorithm for intra E-UTRA can be a tool to reduce the number of ping-pong HOs and control the demands of the network resources. Analysis results -based on fuzzy logic technique- of the proposed algorithm showed that the probability of ping-pong HO can be reduced efficiently as the difference between the received signal strength from the target and the source (SS(target-source)) and the timer value are higher than 3dB and 1.5 sec respectively.

References used

LARS K. RASMUSSEN, “On Ping-Pong Effects in Linear Interference Cancellation for CDMA," in Proc. IEEE 6th ISSTA (New Jersey, USA), Sept. 2000
LANDOLSI, T. and ABU-AMARA, M. “CDMA Access Channel Performance under Idle-Mode Ping-Pong Effect in Inter- MSC Handoffs,” Proceedings of the IEEE International Symposium on Wireless Communication Systems, Spain, September 2006
SHUPENG, L. FANG-CHEN; C. YIFEI; TECK H., “Adaptive Frame Switching for UMTS UL-EDCH - Ping-Pong Avoidance. VTC spring 2006” 2469-2473

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