An Optimistic Quality-of-Service Provisioning Scheme for Cellular Networks

W e propose a n optimistic Quality-of-Service (QoS) provisioning scheme f o r multimedia traffic in wireless networks. The scheme uses the standard classification of network traffic into two priority classes based o n their bandwidth requirement and delay tolerance. W e classify the users as local or departing based o n their current coordinates in the cell. A call admission algorithm, a call management algorithm and a prediction based resource reservation algorithm which reserves the specified bandwidth (by borrowing channels f r o m neighboring cells, i f required) in the predicted destination cell(s) of a departing user are presented. A novel approach called bandwidth compaction is proposed which enables more efficient spectrum utilization. Simulation experiments show improvements of about 24% in the call blocking probability and 12% in the connect ion dropping probability over other bandwidth-reserving schemes. An overall improvement of 24% in bandwidth utilization over other schemes not employing any bandwidth management technique, as also observed.