Physical Carrier Sensing and Spatial Reuse in Multirate and Multihop Wireless Ad Hoc Networks

Minimizing spatial and time reservation with Collision-Aware DCF in mobile ad hoc networks

“…Yang and Vaidya [11] and Zhai and Fang [12] considered the CSC adaptation while taking the influence of MAC over head and transmit rate into consideration. These studies focused on analytic models for obtaining aggregate throughput.…”

“…On the other hand, a high CS threshold may cause more collisions by encouraging more concurrent commu nications. Finding a tradeoff between the spatial reuse and collision has been an active research area in recent years [9][10][11][12][13].…”

Closed Loop RF Management Algorithm for Enterprise High Density WLANs

“…Yang et al [7] then proposed an analytical model to address the impact of MAC overhead on the optimal CCA threshold, considering both bandwidth independent overhead from PHY header, slot time, etc., and bandwidth dependent overhead caused mainly by collisions. Moreover, Zhan et al [9] studied the impact of data rates, multi-hop forwarding, node topology, hidden/exposed terminal problems, and bidirectional handshakes on determining the optimal carrier sensing range. The CCA threshold adaptation algorithm in [11] [9] suggest setting the fixed CCA threshold in an entire network; however, we contend that setting a variable CCA threshold at each node according to local network conditions will better maximize spatial reuse of the network as cells have different density and traffic patterns.…”

“…Moreover, Zhan et al [9] studied the impact of data rates, multi-hop forwarding, node topology, hidden/exposed terminal problems, and bidirectional handshakes on determining the optimal carrier sensing range. The CCA threshold adaptation algorithm in [11] [9] suggest setting the fixed CCA threshold in an entire network; however, we contend that setting a variable CCA threshold at each node according to local network conditions will better maximize spatial reuse of the network as cells have different density and traffic patterns. The analytical approach of [10] provides the most concrete guidance for the optimal CCA threshold for single rate networks: setting the threshold so that the interference range equals the carrier sense range.…”

A Distributed Channel Access Scheduling Scheme with Clean-Air Spatial Reuse for Wireless Mesh Networks

“…In [11], a distributed algorithm is used to dynamically tune each wireless station's power and transmission rate to achieve optimal spatial reuse and network capacity throughput in a CSMA-based network. In [12], they investigate receiver's sensitivity to different transmission rate, transmission range, node topology, and SINR in determining the optimal carrier sense range for a CSMA-based network. These results can not be directly applied to TDMA-based mesh networks.…”