An on-demand routing protocol for improving channel use efficiency in multichannel ad hoc networks

Review of channel assignment approaches in multi-radio multi-channel wireless mesh network

“…Hence, the main objective of the interference-aware channel assignment is to minimize the total network interference which refers to the number of the nodes/links sharing the same channel frequency. Many approaches model the interference within the interference area based on protocol model [14,16,18,19,[22][23][24][25][26][27][28] or physical model [29][30][31][32]. Some of the interference-aware channel assignment approaches aim to minimize the number of the links in the conflict graph sharing same channels has been proposed in [14,[22][23][24].…”

“…Some of the interference-aware channel assignment approaches aim to minimize the number of the links in the conflict graph sharing same channels has been proposed in [14,[22][23][24]. Other interferenceaware approaches minimize the number of links sharing the channel within the corresponding node's interference range (k-hops) [16,18,19,[25][26][27][28]. A more realistic interference index is used in [22,24].…”

“…Many CA approaches [14,17,18,22,27,[45][46][47][48][49][50][51][52][53][54] efficiently address inter-flow interferences in their channel interference index. However, only few research studies address the impact of the interference caused by the hidden nodes [27,55], multi-rate link sharing problem [12,13,44] and external interference [22,47] on the channel throughput in their channel interference index. Several channel interference indexes are developed based on the link capacity [3,4,14,32,34] in their channel interference index to ensure load balancing in WMN.…”

“…The receiver interface is assigned to a unique channel for receiving data, whereas, the sending interface can switch between channels according to the number of the flows received at the node. In PCAM, the receiving interface is considered as static and assigned during the network plan while in [17,[25][26][27], both receiving and sending interface considered as dynamic interfaces and assign a channel during the routing discovery process. This approach keeps high network connectivity but it suffers from control channel interference and congestion in a high-density network.…”

“…In CA-LQSR [26], the scheme uses the calculated transmission time as channel interference metric for channel selection. The M-AODV-M [27], proposed joint routing and channel assignment to address the channel reuse problem along the established path. However, most of these algorithms proposed for ad hoc network and may not efficiently utilize the WMN characteristics to reduce the channel assignment complexity.…”