Fuzzy Reasoning Approach for Local Connectivity Management in Mobile Ad Hoc Networks

2011 ◽  
pp. 1048-1065
Author(s):  
Essam Natsheh ◽  
Adznan B. Jantan ◽  
Sabira Khatun ◽  
Shamala Subramaniam
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Network Performance ◽  
Ad Hoc ◽  
Local Connectivity ◽  
Ad Hoc Routing ◽  
Ad Hoc Routing Protocol ◽  
Uncertainty Measurements ◽  
Hoc Networks ◽  
Routing Tables

Routing is an important functional aspect in wireless ad hoc networks that handles discovering and maintaining the paths between nodes within a network. Due to nodes’ mobility, the efficiency of a dynamic ad hoc routing protocol depends highly on updating speed of network topology changes. To achieve continuous updated routing tables, the nodes periodically broadcast short Hello messages to their neighbors. Although benefits of these messages have been proven, many studies show some drawbacks for these messages. In this paper, we adaptively optimize the frequent needs of those messages using a fuzzy logic system. The proposed fuzzy algorithm is used to model the uncertainty measurements for updating local connectivity successfully in time. Extensive performance analysis via simulation proves the effectiveness of the proposed method to improve the accuracy of neighborhood information and, hence, overall network performance.

Mobile Multimedia Streaming Using Secure Multipath in Wireless Ad Hoc Networks

2010 ◽  
Vol 1 (2) ◽  
pp. 54-74
Author(s):  
Lei Chen ◽  
Chung-wei Lee
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Ad Hoc ◽  
Routing Algorithm ◽  
Data Distribution ◽  
Multimedia Streaming ◽  
Multimedia Data ◽  
Ad Hoc Routing ◽  
Secure Data ◽  
Hoc Networks

Supporting reliable and secure multimedia streaming service is a challenging task in the environment of wireless Mobile Ad hoc Networks (MANETs) where radio signals are prone to security attacks and the quality of media streaming is degraded by signal strength loss and interference. The mobility of mobile devices makes streaming even more difficult as communication links are often broken when the devices move out of the transmission range of their neighbors. This paper proposes a stable multipath routing algorithm and an intelligent secure data distribution scheme for multimedia streaming in MANETs. The multipath Neighbor Stability Routing is able to find more stable and long-lasting paths than traditional ad hoc routing algorithms. The secure data distribution takes historical data-path distribution into consideration and maximally disperses new multimedia data to reduce the possibility of information leakage to unauthorized parties. The authors’ simulation and analysis indicate that the combination of these two mechanisms can provide high quality paths to achieve secure multimedia streaming.

Node Cooperation to Avoid Early Congestion Detection Based on Cross-Layer for Wireless Ad Hoc Networks

2016 ◽  
Vol 6 (5) ◽  
pp. 2322
Author(s):  
Abdalrazak Tareq Rahem ◽  
Mahamod Ismail ◽  
Nor Fadzilah Abdullah ◽  
Mohammed Balfaqih
Keyword(s):  
Ad Hoc Networks ◽  
Congestion Control ◽  
Wireless Ad Hoc Networks ◽  
Network Performance ◽  
Ad Hoc ◽  
Effective Control ◽  
Cross Layer ◽  
Delivery Ratio ◽  
Node Cooperation ◽  
Hoc Networks

<p><span>The resent application of wireless ad hoc networks (WANET) demands a high and reliable data load. The simultaneous transfer of large amounts of data different nearby sources to nearby destinations in a massive network under these circumstances results in the possibility of network congestion. Congestion is an extremely unwanted condition because it creates extra overhead to the already deeply loaded environment, which ultimately leads to resource exhaustion, and can lead to packet drops and retransmission at either the MAC or upper layers. We present a lightweight congestion control and early avoidance congestion control scheme, which can effective control congestion while keeping overhead to a minimum. This scheme is based on the Cross-layer between the MAC and network layers lead to early detection of congestion. With the help of node cooperation the sender node is triggered to find an alternative route based on TMT. This mechanism controls the network resources rather than the data traffic. Detailed performance results show enhancement in the throughput and packet delivery ratio, as well as a reduction in packet drop. Generally, network performance increases.</span></p>

scholarly journals Adaptive and Fuzzy Approaches for Nodes Affinity Management in Wireless Ad-Hoc Networks

2008 ◽  
Vol 4 (4) ◽  
pp. 273-295 ◽  
Author(s):  
Essam Natsheh ◽  
Tat-Chee Wan
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Routing Protocols ◽  
Ad Hoc ◽  
Fuzzy Logic System ◽  
Ad Hoc Routing ◽  
Hoc Networks ◽  
The Relationship ◽  
Nonlinear Fashion ◽  
Logic System

In most of the ad-hoc routing protocols, a static link lifetime (LL) is used for a newly discovered neighbors. Though this works well for networks with fixed infrastructures, it is inadequate for ad-hoc networks due to nodes mobility and frequent breaks of links. To overcome this problem, routing protocols with estimated LL using nodes affinity were introduced. However, these protocols also used the static estimated LL during the connection time. In contrast to that, in this paper two methods are presented to estimate LL based on nodes affinity and then continually update those values depending on changes of the affinity. In the first method, linear function is used to map the relationship between the signal strength fluctuation and LL. In the second method, fuzzy logic system is used to map this relationship in a nonlinear fashion. Significance of the proposed methods is validated using simulation. Results indicate that fuzzy method provides the most efficient and robust LL values for routing protocols.

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