Call Admission Control based on Bandwidth Allocation in Ultra Wide Band (UWB) Ad Hoc Networks

In Ultra-Wide Band (UWB) ad hoc networks, admission control and resource management are of major concern. The admission control algorithm helps in resolving infeasible power, reduces the congestion, and guarantees the quality of service (QoS) of unlicensed secondary users. The long acquisition time in the UWB transmissions and the near-sender blocking problems can be resolved by resource management effectively. In this paper, an admission control scheme and the resource management in UWB ad hoc routing is proposed. The bandwidth allocation and the bandwidth redistribution methods are employed here for the call admission control. Initially, bandwidth allocation is done using the HCF Controlled Channel Access (HCCA) centralized access which allows the HC to assign Transmission opportunity (TXOPs) to the ACs by taking into account the specific time constraints of each AC. After allocating the bandwidth, the free bandwidth is allocated to the other stations by estimating the traffic load. The call admission control is employed in order to guarantee the QoS. Simulation results show that the bandwidth allocation and call admission control scheme effectively solves the near-sender blocking problems in UWB ad hoc networks and improves achieved throughput and supports best effort traffic. radio (IR) technology. (3) Based upon the traffic types the management techniques are introduced individually. The guaranteed Quality of Service (QoS) also called best effort (BE) specifies the minimum degree of QoS throughout the connection which is used for the traffic type classification. (4) The primary and active feature of radio networks have distributed architecture which helps in military applications. The infrastructure-less access in the ad hoc network and the coverage area which is faster and economically enhances the networking world providing vast applications in commercial sector. In areas where there is no communication support and where the infrastructure is hard to deploy, the wireless ad hoc networks effectively supports communication. In some places, the radio frequency spectrum doesn't have the permit for usage and thus the UWB applications are specifically highlighted in these regions. Numerous possible routes can be discovered while transferring data from source to destination node. Due to this broadcasting nature of wireless media the neighboring UWB links also hamper in the data transfer. There is a difference in the received signal to noise ratio level which differentiates the higher quality and lower quality of routes in a specific time. So, the ad hoc networks can improve their performance by efficiently utilizing the possible radio resources by employing cooperative transmission strategies. (5)