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2019 | Buch

Wireless Networks: An Overview Kapitel lesen Erstes Kapitel lesen

Node-to-Node Approaching in Wireless Mesh Connectivity

verfasst von: Dr. Madhusudan Singh

Verlag: Springer Singapore

Buchreihe : SpringerBriefs in Applied Sciences and Technology

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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Über dieses Buch

This book highlights routing protocols for wireless mesh networks (WMNs; IEEE 802.11s). It provides an overview of the wireless networks (history, MANET, family of IEEE 802.11, WMNS, etc.) and routing protocols, such as AODV, DSR, OLSR, etc, and also highlights two resolutions of routing protocols with respect to end-to-end delay, packet delivery ratio and routing overhead in WMNs. Wireless mesh networks have become a hot topic for researcher into the deployment of wireless networks, and they represents the connectivity of mesh networking in IEEE 802.11 amendment in static and ad-hoc networks. Moreover, WMNs have numerous attractive features, such as highly reliable connectivity, easy deployment, self-healing, self-configuring, and flexible network expansion. The book describes two routing mechanisms: novel cluster-based routing protocols (NCBRP), and decentralized hybrid wireless mesh protocol (DHWMP).

Inhaltsverzeichnis

Frontmatter
Chapter 1. Wireless Networks: An Overview
Abstract
In this chapter author’s has discussed about brief of basic of Networks such as wired networks, wireless networks. Also discussed about wired vs. wireless networks and then later we have discussed in detail features of the IEEE 802.11s with all relating topics. The IEEE 802.11s has also called Wireless LAN Mesh Networks.
Madhusudan Singh
Chapter 2. Wireless Mesh Networks Architecture
Abstract
Wireless Mesh Networks (IEEE 802.11s) provides a cost effective and simple way for wireless networking. However, the problem is the wired connection between the APs. The wired links increases complexity and deployment cost in many situations. Therefore, it is desirable to connect the APs via wireless links as well and create a WLAN Mesh. In WMNs, APs turn into mesh access points (MAPs). Mobile stations are sometimes referred as mesh clients. The new IEEE 802.11s standard for WMNs introduces a third class of nodes called mesh points (MPs). MPs and MAPs support WLAN mesh services, allowing them to forward packets on behalf of other nodes to extend the wireless transmission range. Mesh clients can associate with MAPs but not with MPs. Mesh portals (MPPs) are MAPs which provides connectivity to other networks thus acting as a gateway for Mesh Networks.
Madhusudan Singh
Chapter 3. Routing Protocol for WMNs
Abstract
Wireless mesh networks are multi-hop networks. Therefore, a mechanism for finding a path between source and destination is needed. Static routing means that the path is set up manually, while dynamic routing requires a routing protocol which sets up routing tables. A router forwards packets to a next hop neighbor, which is chosen upon a routing metric. This process is called routing. Wired networks either uses distance vector or link state routing protocol. With distance-vector protocols each node keeps a vector of its neighbors and their distance. The router periodically broadcasts the distance-vector to its one-hop neighbors. Distance is usually the hop count or weighted hop count. Routing Information Protocol (RIP) and Border Gateway Protocol (BGP) are two famous distance vector protocols. On other hand link state routing protocols construct a map of the connectivity of the networks, in the form of a graph showing which nodes are connected to which other nodes.
Madhusudan Singh
Chapter 4. Novel Cluster Based Node to Node Approaching (NCBN-to-NA in WMNs Process) in Wireless Mesh Connectivity
Abstract
Many researchers have proposed many routing techniques for WMNs. Most of them focus on routing field such as high mobility scenario; unpredictable networks change. Many on demand routing protocols such as DSR and AODV were proposed from these points of view. After these traditional protocols, researchers propose opportunistic routing protocols such as ExOR, ROMER and etc.; which are also of broadcast nature. They lack of node selection during the forwarding, avoid duplicate transmission and etc. In this chapter, we talk about an alternative routing approach, Cluster-Based routing protocol for wireless mesh networks. We gave some extra power and responsibility to mesh portal point (MPP) and cluster head of each group.
Madhusudan Singh
Chapter 5. Decentralized Hybrid Wireless Mesh Protocol (DHWMP) Mechanism
Abstract
The HWMP is the combination of both reactive and proactive routing components. The default routing approach used in the WMN is HWMP. Every WMN manageable device has capacity of using this path selection protocol. It provides interoperability between the devices of different vendors. HWMP contains both reactive and proactive routing components. In the existing HWMP, the proactive tree-based routing is totally centralized and constrained by the root node. Even if a short path exists between the two mesh points (MPs), the proactive routing node still routes the packets via the root node, which results in a bottleneck at the root node and wastes precious wireless resources due to the non-optimized routing path. The HWMP in IEEE802.11s still cannot support route optimization between two MPs. The reactive routing (on-demand routing) protocol always initializes with the path discovery process. It has some broadcasting problems and wastage of power resources. Therefore, we have tried to solve some of the problems in this study for that we introduce decentralized root nodes.
Madhusudan Singh
Chapter 6. Wireless Mesh Networks: Real-Time Test-Bed
Abstract
In this chapter, we discuss an implementation of WMNs. The implementation is based on the draft 4.0 for the IEEE802.11s, which is made available at the time of implementation. The general architecture of IEEE802.11s and major protocols are same as the previous draft. Though, some names and features have been slightly changed in the draft 4.0. Researchers had been using networks simulator to evaluate the performance of WMNs. However, we believe that simulation results might not reflect the true performance of a WMN. Different results had been observed between researches involving tests based on real implementation. Therefore, a test-bed had been set up according to the current IEEE 802.11s draft 4.0 to evaluate the performance of the WMN protocol.
Madhusudan Singh
Backmatter
Metadaten
Titel
Node-to-Node Approaching in Wireless Mesh Connectivity
verfasst von
Dr. Madhusudan Singh
Copyright-Jahr
2019
Verlag
Springer Singapore
Electronic ISBN
978-981-13-0674-7
Print ISBN
978-981-13-0673-0
DOI
https://doi.org/10.1007/978-981-13-0674-7

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