Abstract

The utilization of wireless mesh networks (WMNs) has greatly increased, and the multi-interface multichannel (MIMC) technic has been widely used for the backbone network. Unfortunately, the ad hoc on-demand distance vector (AODV) routing protocol defined in the IEEE 802.11s standard was designed for WMNs using the single-interface single-channel technic. So, we define a problem that happens when the legacy AODV is used in MIMC WMNs and propose an interface assignment-based AODV (IA-AODV) in order to resolve that problem. IA-AODV, which is based on multitarget path request, consists of the PREQ prediction scheme, the PREQ loss recovery scheme, and the PREQ sender assignment scheme. A detailed operation according to various network conditions and services is introduced, and the routing efficiency and network reliability of a network using IA-AODV are analyzed over the presented system model. Finally, after a real-world test-bed for MIMC WMNs using the IA-AODV routing protocol is implemented, the various indicators of the network are evaluated through experiments. When the proposed routing protocol is compared with the existing AODV routing protocol, it performs the path update using only 14.33% of the management frames, completely removes the routing malfunction, and reduces the UDP packet loss ratio by 0.0012%.

Highlights

  • We define the problems that occur when an existing ad hoc on-demand distance vector (AODV) is used in multi-interface multichannel (MIMC) Wireless mesh networks (WMNs), and we present a new routing protocol that improves routing efficiency and network reliability

  • interface assignment-based AODV (IA-AODV) considers features of MIMC WMNs employed in backbone networks in various fields and achieves network reliability through a propagation method for routing MGMT frames based on interface assignment

  • We define some issues that occur when the existing AODV routing protocol has been applied to a MIMC WMN environment, and we propose IA-AODV to resolve the above problems, thereby improving routing efficiency and network reliability

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Summary

Introduction

If network scale expands or a specific application that generates a lot of internal network traffic is in service, traffic flow may not be directed to the mesh portal [9, 10] In this case, the overhead of the path update process will greatly increase, so it must be handled by the routing protocol. We define the problems that occur when an existing AODV is used in MIMC WMNs, and we present a new routing protocol that improves routing efficiency and network reliability. (ii) When a PREQ is received through multiple interfaces, the random receiving order of the PREQ shows a low correlation between the routing metric and the PREQ receiving order Because of this problem, frequent replacement of the interface responsible for next-hop communication occurs, and network reliability will be degraded from the decrease in packet delivery ratio and an increase in the routing malfunction ratio.

Background and Related Works
System Model and Problem Statement
C PREQ SN10 PREQ SN11 PREQ SN12 D
Problem Statement
PREQ Prediction Scheme
F Target node
Experimental Results with a Real-World Test-Bed
The Evaluation and Analysis of Experimental Results
Conclusion
Full Text
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