Optimal Channel Access Management with QoS Support for Cognitive Vehicular Networks

We consider the problem of optimal channel access to provide quality of service (QoS) for data transmission in cognitive vehicular networks. In such a network the vehicular nodes can opportunistically access the radio channels (referred to as shared-use channels) which are allocated to licensed users. Also, they are able to reserve a channel for dedicated access (referred to as exclusive-use channel) for data transmission. A channel access management framework is developed for cluster-based communication among vehicular nodes. This framework has three components: opportunistic access to shared-use channels, reservation of exclusive-use channel, and cluster size control. A hierarchical optimization model is then developed for this framework to obtain the optimal policy. The objective of the optimization model is to maximize the utility of the vehicular nodes in a cluster and to minimize the cost of reserving exclusive-use channel while the QoS requirements of data transmission (for veh...

• Type: Journal
• Year: 2011
• Where: TMC
• Authors: Dusit Niyato, Ekram Hossain, Ping Wang
• Keywords: Channel Access, Hierarchical Optimization Model, Optimal Channel Access, TMC 2011