Handoff Call Queuing in Distributed Dynamic Channel Allocation Strategy

Abstract

ABSTRACT

It is important to utilize the channels very efficiently in cellular system as these channels are meager. In this paper, A Distributed Dynamic Channel Allocation (DDCA) strategy is applied for channel allocation in 9-cell system having non-uniform traffic. Square shape cells with nine cell cluster size have been considered for model development with GSM 1800 specification. The model also considers fixed channel reservation (5–15% of total channel per cell) for handoff calls only, to reduce the handoff call dropping probability (HCDP). Different call arrival rates ranging from 0.1 calls/s to 4 calls/s have been considered. Handoff call queuing method is also implemented for reducing the HCDP. The results indicate that the handoff dropping probability reduces with increase in percentage handoff reservation. Likewise, queuing the Handoff calls further reduces the HCDP. A comparison between HCDP without queuing the handoff calls and with queuing of handoff calls has been attempted.

Keywords: Dynamic channel allocation, handoff calls, queuing, blocking probabilities, dropping probabilities.