Queuing-Based Dynamic Multi-Guard Channel Scheme for Voice/Data Integrated Cellular Wireless Networks

iii In voice/data integrated cellular wireless networks where handoffs occur more often than earlier mobile networks, it’s important to introduce a scheme that gives priority to handoff calls over new calls. From the user’s perspective dropping a handoff call is less desirable than blocking a new one. Furthermore, from the service provider’s point of view the objective is to improve the utilization of the wireless channel. Motivated with these arguments, a new scheme named as (QDCRS) is proposed which combines the features of Dynamic Channel Reservation Scheme (DCRS) and Handoff Queuing Scheme (HQS). The design goal is to maintain a low dropping probability while decreasing the blocking probability and improving the system performance. Traffic is divided into four classes and priority is given in the following order: (1. handoff voice calls, 2. handoff data calls, 3. new voice calls, 4. new data calls). The boundary between traffic classes is dynamically adjusted according to the mobility o