Utility-maximization bandwidth adaptation for multi-class traffic QoS provisioning in wireless networks
Ning Lü, John M. Bigham · 2005
Adaptive bandwidth allocation is becoming very attractive in wireless communications since it can dynamically adjust the allocated bandwidth of ongoing calls to cope with the network resource fluctuations. In this paper, we propose a utility-based bandwidth adaptation scheme for multi-class traffic QoS provisioning in wireless networks. With the proposed scheme, each call is assigned a utility function and depending on the network load the bandwidth of ongoing calls are upgraded or degraded so that the achieved utility of each individual cell is maximized. We also take into account the negative effects of bandwidth adaptation by integrating adaptation penalty into the utility function. Simulation experiments are carried out to evaluate the performance of the proposed scheme. Results show that our adaptive scheme is effective in both increasing cell utility and reducing the call blocking and handoff dropping probabilities of wireless networks.