37 research outputs found
An Adaptive Common Control Channel MAC with Transmission Opportunity in IEEE 802.11ac
Get PDFSpectral utilization is a major challenge in wireless ad hoc networks due in part to using limited network resources. For ad hoc networks, the bandwidth is shared among stations that can transmit data at any point in time. It  is important to maximize the throughput to enhance the network service. In this paper, we propose an adaptive multi-channel access with transmission opportunity protocol for multi-channel ad hoc networks, called AMCA-TXOP. For the purpose of coordination, the proposed protocol uses an adaptive common control channel over which the stations negotiate their channel selection based on the entire available bandwidth and then switch to the negotiated channel. AMCA-TXOP requires a single radio interface so that each station can listen to the control channel, which can overhear all agreements made by the other stations. This allows parallel transmission to multiple stations over various channels, prioritizing data traffic to achieve the quality-of-service requirements. The proposed approach can work with the 802.11ac protocol, which has expanded the bandwidth to 160 MHz by channel bonding. Simulations were conducted to demonstrate the throughput gains that can be achieved using the AMCA-TXOP protocol. Moreover, we compared our protocol with  the IEEE 802.11ac standard protocols
Average results for end-to-end delay considering vehicle density.
No full textAverage results for end-to-end delay considering vehicle density.</p
Average results for SSIM index considering various data rate.
No full textAverage results for SSIM index considering various data rate.</p
Average results for PSNR considering various vehicle densities.
No full textAverage results for PSNR considering various vehicle densities.</p
Average results for PSNR considering various data rate.
No full textAverage results for PSNR considering various data rate.</p
