Handover prioritizing scheme for reducing call failure probability in cellular wireless network

Abstract

This paper proposes a scheme suitable for managing handover in wireless cellular network. The main objective of the proposed scheme is to reduce the probability of forced termination of ongoing call due to handover failure. The scheme employs a queuing discipline, and the priority of queued is based on the residual time of the mobile user in the overlap region between two adjacent cells, assuming that the user's location and speed can be determined, then we applied the ascending priority; it means that the users having a shorter residual time join the head of the queue (i.e., high priority) while those having longer residual time at the end of the queue (i.e., low priority). Fixed channel allocation strategy (FCA) is employed and simulation results obtained concern: call blocking probability (CBP), handover failure probability, and average waiting time in the queue. Also simulation results are compared to those obtained by: non‐prioritized scheme (FCA), and FCA queuing with FIFO discipline. Results show that our proposed method decreases significantly handover failure probability compared with other two schemes. Copyright © 2009 John Wiley & Sons, Ltd.

Determination of the Traffic Properties of Cells with Mobile Users Using a Mixed Traffic

“…In this case the values of P bh are mutually similar: for lower values of A p < 7E system from [25] has lower P bh , while for A p > 7E system from [25] has higher P bh . The value of P bp is always lower for the system from [25]. But, as already emphasized, the results are presented for the high value P h = 0.64, meaning that handovers are very frequent.…”

“…The characteristics P bp and P bh for the model presented in this paper are also compared to the characteristics of the system from [25]. The characteristics from this paper are compared to the characteristics from Fig.…”

“…6 and Fig. 7 in [25]. Both systems have 10 traffic channels and we adopted high value P h = 0.64 for the system presented in this paper, thus significantly increasing the values of P bp and P bh .…”

Satellite Handover Techniques for LEO Networks Serving Air Traffic Control Communication

“…This leads to a remarkable probability of communication interruption and the handover mechanism becomes important for the global performance of the system. There are two types of handover events, as is the case in land mobile systems, the cell handover [5] and the satellite handover. The first one refers to the transfer of an ongoing contact from one cell to the next one in the same satellite footprint while the second one describes the transfer of an ongoing contact from a satellite to another one.…”

Modeling Handover in Satellite Communications

“…The handover has been studied from several points of view: algorithms, protocol, mechanisms, architectural, etc., [4][5][6]. The interests of the work take into account several aspects: -Improving handover (seamless handover, reduce the loss of blocking, improve network utilization, etc.,) and QoS.…”