Queueing analysis of combined guard channel and mobile assisted handoff on prioritized channel assignment for cellular network

In this paper we have considered a wireless mobile network with data/voice traffic. The paper, considered two type of channel assignment (1) with guard channel (2) without guard channel. In cellular mobile system, radio channels are very limited and mobility of mobile terminal occurs a phenomenon called handoff. Handoff is defined as process of transferring an ongoing call or data session from one channel connected to the core network to another. Due to the limited bandwidth available in various cells, there is a finite probability that an ongoing call, while being handed off, or it may get dropped. Minimizing the dropping of ongoing call during the handoff is the important issue for the mobile communication. In this paper we analyzed the channel assignment by the Queueing approach and compared the result of both the models in terms of dropping and blocking probability. We used the MAHO scheme, mobile assisted handoff, in which mobile terminal assists BSS and mobile switching center makes handoff decisions. In MAHO mobile terminal required to reports its RSSI (received signal strength indication) back to its serving BSS. In first case we reserved some channels for handoff calls. And in 2nd case we didn’t use any guard channel; there is no priority in channel assignment for handoff. Keyword: cellular wireless network, queuing theory, MAHO, guard channel, handoff. ——————————  ——————————