Abstract
The contribution of this paper is two fold. It first analyses the flooding strategies for the Wireless Multihop Networks (WMNs) then it enhances the reactive and proactive routing protocols. For analysis purpose, we select four widely used flooding techniques for routing: i. traditional flooding, ii. Time-To-Live based Expanding Ring Search (TTL-based ERS) flooding scheme, iii. TTL-based Scope Routing (SR) flooding and iv. Multi-Point Relays (MPR) flooding. These techniques play a vital role and act as a backbone for routing protocols. Therefore, we compare efficiency of these techniques for six widely used routing protocols: Ad-hoc On-demand Distance Vector (AODV), Destination Sequenced Distance Vector (DSDV), Dynamic Source Routing (DSR), DYnamic MANET On-demand (DYMO), Fish-eye Scope Routing (FSR) and Optimized Link State Routing (OLSR). DSDV uses traditional flooding, AODV, DSR and DYMO use TTL-based ERS flooding, FSR uses TTL-based SR flooding and OLSR uses MPR flooding. This paper also presents mathematical models for flooding techniques and studies the affects of these techniques on their respective protocols in terms of energy and time consumption. This is done to measure the cost incurred by the routing protocols in the form of routing overhead and latencies. A novel contribution of this work is the enhancement in search set values and intervals of routing algorithms to improve the efficiency of selected existing protocols. A detailed comparison analysis of selected protocols with their default and enhanced routing algorithms in NS-2 is also a part of this work.
Highlights
Wireless Multihop Networks (WMNs) are the type of wireless networks that use multi-hop routing mechanism for communication
That is none of the parameters is compromised to achieve any of the other parameters
SIMULATION RESULTS The performance of the modeled framework of original and enhanced routing protocols Ad-hoc On-demand Distance Vector (AODV), Destination Sequenced Distance Vector (DSDV), Dynamic Source Routing (DSR), DYMO, Fish-eye Scope Routing (FSR) and Optimized Link State Routing (OLSR) is measured through simulations in NS-2
Summary
Wireless Multihop Networks (WMNs) are the type of wireless networks that use multi-hop routing mechanism for communication. Al-Zahrani: On Modeling Optimizations and Enhancing Routing Protocols for WMNs techniques have been proposed to minimize the overhead that include Time-To-Live (TTL)-based and Node Degree-based strategies [1]. Source node restarts the search again with larger TTL value than the previous one This process continues until the destination node is found or the originator gives up. Each node within that subset selects another subset of forwarding nodes from its neighbors and continues relaying request message This strategy minimizes the flooding control overhead. Computation of the optimal local subset is quite difficult in the case of WMNs. This paper presents an empirical model of the above said routing strategies along with the routing protocols that employ these techniques.
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