DESIGN OF FUZZY BASED MULTI-CONSTRAINED ROUTING PROTOCOL AND THE PERFORMANCE EVALUATION

2008 ◽  
Vol 09 (04) ◽  
pp. 369-387 ◽  
Author(s):  
JING ZUO ◽  
XUEFEN CHI ◽  
LIN GUAN ◽  
HONGXIA LI ◽  
IRFAN AWAN
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Routing Protocol ◽  
Routing Protocols ◽  
Large Scale ◽  
Ad Hoc ◽  
Qos Routing ◽  
Route Maintenance ◽  
Hoc Networks ◽  
Large Scale Networks

Single-constrained QoS routing protocols have inherent defects when applied into wireless ad hoc networks. Due to a single constraint parameter is only considered, they can't always cope with the problems caused by the uncertainty of ad hoc networks well. They are not robust enough. In order to overcome the drawbacks of single-constrained QoS routing protocols and improve the Quality of Service (QoS) of ad hoc networks, this paper proposed a multi-constrained QoS routing protocol based on fuzzy logic. It is developed from Dynamic Source Routing (DSR). The proposed protocol is service-aware in the sense that it considers the QoS required by different types of services and takes different network state parameters as the constraint conditions for fuzzy based routing system. New route discovery procedure and novel route maintenance mechanism are designed to support corresponding QoS requirements. Speed of packets sending is also adjusted adaptively referring to the outputs of the proposed fuzzy system. Performance of the fuzzy based DSR protocol is measured and evaluated under different conditions. Simulation results show that the improved protocol has better QoS guarantee capabilities compared to single-constrained QoS routing protocols for large-scale networks in terms of lower delay, smoother delay variation and lower packet loss rate.

scholarly journals SCAR: A Coding-Aware Routing Protocol with Self-Recommendation in Static Wireless Ad Hoc Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Jin Wang ◽  
Cenzhe Zhu ◽  
Teck Yoong Chai ◽  
Wai-Choong Wong
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Routing Protocol ◽  
Routing Protocols ◽  
Ad Hoc ◽  
Protocol Design ◽  
Maximum Throughput ◽  
Throughput Gain ◽  
Multiple Flows ◽  
Hoc Networks

There have been researchers working on the design of coding-aware routing protocols to exploit the power of network coding in static wireless ad hoc networks. However, most of them have overlooked the fact that routing decisions for multiple flows need to be coordinated in order to achieve maximum throughput. A mechanism to alter prior routing decisions is mandatory for this purpose. In this paper, we propose Self-recommendation coding-aware routing (SCAR), to provide such a mechanism. With intermediate nodes sensing the arrival of new flows, they can send self-recommendations to source nodes, triggering a route-change procedure. In the route-change procedure, adjustments are applied to the route metrics so that the newly recommended route can be fairly weighed without bias. A thorough analysis of coding structures is carried out, and a series of indicators are devised to predict how much throughput benefits we can gain from the mere knowledge of the topology. The rationale behind the protocol design and the effectiveness of the indicators are further justified by a series of simulations. Results show that SCAR can exploit coding opportunities better and provide higher throughput than other coding-aware routing protocols. It is also shown that the opportunity of throughput gain is ubiquitous and it is tested on many typical topologies.

scholarly journals Comparative Performance Analysis of Different Routing Protocols in Wireless Ad-hoc networks (IEEE 802.11)

2018 ◽  
Vol 8 (3) ◽  
pp. 874-886
Author(s):  
Mahendra Kumar ◽  
A. K. Jain
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Routing Protocol ◽  
Routing Protocols ◽  
Ad Hoc ◽  
Performance Comparison ◽  
Network Simulator ◽  
Comparative Performance ◽  
Ad Hoc Wireless Network ◽  
Hoc Networks

Wireless Ad-hoc networks have lack of mass deployment. An Ad hoc wireless network has a dynamic nature that leads to constant changes in its network topology.  There is an infrastructure less and decentralized network which need a robust dynamic routing protocol. This article presents performance comparison of wireless Ad-hoc network on different routing protocols. Network simulator QualNet 5.0.2 has been used to evaluate the performance of wireless networks with various routing protocols.

A Bandwidth and Energy Aware QoS Routing Protocol for Enhanced Performance in Ad-hoc Networks

2019 ◽  
Vol 9 (2) ◽  
pp. 203-213
Author(s):  
Priyanka Bharadwaj ◽  
Surjeet Balhara
Keyword(s):  
Ad Hoc Networks ◽  
Routing Protocol ◽  
Ad Hoc ◽  
Qos Routing ◽  
Delivery Ratio ◽  
Energy Aware ◽  
Multimedia Services ◽  
Average Delay ◽  
Hoc Networks

Background & Objective: There are some challenging issues such as providing Quality of Service (QoS), restricted usage of channels and shared bandwidth pertaining to ad-hoc networks in a dynamic topology. Hence, there is a requirement to support QoS for the application environment and multimedia services in ad-hoc networks with the fast growing and emerging development of information technology. Eventually, bandwidth is one of the key elements to be considered. Methods: Energy aware QoS routing protocol in an ad-hoc network is presented in this article. Results and Conclusion: The simulation results indicate that the improved protocol outperforms Adhoc On-Demand Distance Vector (AODV) routing protocol in terms of QoS metric such as throughput, packet delivery ratio, loss rate and average delay.

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