Computers & Mathematics with Applications
Multi-level dynamic guard channels for priority access in cellular systems
NETWORKING'05 Proceedings of the 4th IFIP-TC6 international conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication Systems
| Hi-index | 0.00 |
Handoff is one of the key elements in ensuring quality ofservice (QoS) in mobile wireless networks. Handoffconnections generally have higher priority than newconnections. Traditional reservation policies that reservesome channels for handoff connections are not adaptive totraffic load changes. This paper proposes a new DynamicGuard Channel Scheme (DGCS), which 1) adapts tovarious traffic loads; 2) combines differentiated QoSservice model and priority handoff mechanism; 3)provides fairness for differentiated QoS services; 4) doesnot need to exchange state information among differentcells, so it is easy to be implemented and is simple enoughto be used in real time environments; 5) utilizes networkresource efficiently and puts a bound on each serviceblocking probability. The simulation results show that theratios among different QoS service probabilities areguaranteed to be predefined values and system utilizationis improved greatly.