**Author details**

Svilen Ivanov *rt-solutions.de GmbH, Oberländer Ufer 190a, D-50968 Cologne, Germany*

#### Edgar Nett

*Institut of Distributed Systems, Otto von Guericke University of Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany*

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24 Will-be-set-by-IN-TECH 226 Wireless Mesh Networks – Effi cient Link Scheduling, Channel Assignment and Network Planning Strategies **Chapter 0**

*on Emerging technologies & factory automation*, IEEE Press, Piscataway, NJ, USA, pp. 1141–1148.

**High Throughput Path Establishment for Common**

**Chapter 10**

Recently, Wireless Mesh Networks (WMNs) technology has gained a lot of attention and become popular in the wireless technology and the industry fields. This rising popularity is due to its low cost, rapid development and ability to offer broadband wireless access to the internet in places where wired infrastructure is not available or worthy to be deployed [2]. Wireless Mesh Networks (WMNs) consist of mesh routers that collect and forward the traffic generated by mesh clients. Mesh routers are typically fixed and equipped with multiple radio interfaces. Mesh clients are mobile, and data are forwarded by mesh routers to the intended destination. One or more mesh routers may have gateway functionality and provide connectivity to other networks such as internet access, as shown in Fig. 1. In the WMNs, most of the flows are between the mesh client and the gateway; this kind of traffic is called internet

traffic which is the common WMNs traffic as users need to access wired resources.

Gateway discovery approaches in multihop wireless mesh network can be categorized into

1. Proactive approach: The proactive gateway discovery is initiated by the gateway itself. The gateway periodically broadcasts a gateway advertisement (GWADV). The mesh nodes that receive the advertisement create or update the route entry for the gateway and then rebroadcast the message. Therefore, each node in the WMN are registered with a gateway [11, 15]. The proactive approach provides a good network connectivity and good handoff before losing the connectivity to their original gateway and the gateway routes are always available at all times, which reduces the routing discovery latency. However, this approach imposes a high overhead due to flooding the GWADV message throughout the network. 2. Reactive approach: The reactive gateway discovery is initiated by the mesh router that creates or updates a route to a gateway. The mesh router node broadcasts a Route REQuest (RREQ) message with an "I" flag (RREQ\_I) to the gateways. Thus, only the gateways are addressed by this message, and only they process it. When a gateway receives a

and reproduction in any medium, provided the original work is properly cited.

©2012 Mogaibel et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0),which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly

© 2012 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution,

**Traffic in Wireless Mesh Networks**

Additional information is available at the end of the chapter

and Nor Asilah Wati Abdul Hamid

http://dx.doi.org/10.5772/48723

three categories as follows:

cited.

**1. Introduction**

Hassen A. Mogaibel, Mohamed Othman, Shamala Subramaniam

