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Rapid and unpredictable topology changes and resource constraints make delivering packets in a MANET (mobile ad hoc network) a challenging task. Routing information has to be updated to reflect the topology changes and maintain the correctness of route selection. On the other hand, the dissemination of control messages has to be optimised for efficient resource usage and to alleviate channel contention...
Reputation system can make a mobile ad hoc network be more cooperative and securer. However it can be cheated by the propagation of rumor produced by malicious or selfish node for using second-hand observation. As the malicious and selfish nodes are more and more trickish, false recommendation emerged dynamically and randomly. Hence, most traditional solution can hardly mitigate the threat from liars...
Mobile ad hoc networks (MANETs) are videly in use in rescue, military operations, scientific and business areas. Many studies are addressed in MANETs because of their need to long lasting liveness, fault tolerance, dynamic addressing, collusion prevention, mobility management and security. Especially, self clustering, backbone construction and routing are the most interesting academic and industrial...
This paper proposes an energy-efficient path selection algorithm which aims at balancing the contrasting objectives of maximizing network lifetime and minimizing energy consumption routing in mobile ad hoc networks (MANETs). The method is based on a reinforcement learning technique called the on- policy Monte Carlo (ONMC) method. Simulation results show that variants of the proposed method can outperform...
Mobile ad hoc network(MANET) can increase independence and flexibility of network because it is consisted of mobile nodes without the aid of fixed infra, but, by unrestricted for the participation and breakaway of node, it has the difficulty in routing which is a basic function of network operation. To solve those problems, a suggestion is the location-based routing algorithm using geological or logical...
Conventional on-demand route discovery methods in mobile ad hoc networks (MANET) employ blind flooding, where a mobile node blindly rebroadcasts received Route Request (RREQ) packets until a route to a particular destination is established. This can potentially lead to high channel contention, causing redundant retransmissions and thus excessive packet collisions in the network. Such a phenomenon...
In MANETs, ACK loss can affect TCP communication performance, since end-to-end reliable delivery of data packets is guaranteed by using ACK packets sent from a TCP receiver. This ACK loss may force a TCP sender to produce unnecessary retransmissions (called spurious retransmissions). These spurious retransmissions can also degrade the performance of TCP flows in the network because they will create...
A mobile ad hoc network (MANET) is one consisting of a set of mobile hosts capable of communicating with each other without the assistance of base stations. Earlier research has proposed several unipath routing protocols specifically on MANET, but most studies have not focused on the limitations of battery resource. However, the single path is easily broken and needs to perform a route discovery process...
In multi-hop mobile ad hoc networks (MANETs), mobile nodes cooperate with each other without using any infrastructure such as access points or base stations. Security remains a major challenge for these networks due to their features of open medium, dynamically changing topologies, reliance on cooperative algorithms, absence of centralized monitoring points, and lack of clear lines of defense. Among...
In mobile ad hoc networks (MANETs), multi-hop message relay is the common way for nodes to communicate and participate in network operations, making routing a primary issue. The early research efforts on MANET routing focused mainly on effectiveness and efficiency under the assumption of perfectly cooperative networks. However, MANETs may not be such a friendly environment for various reasons. Routing...
Hosts in mobile ad hoc networks (MANET) are capable of self-configuration and they can migrate at will, which makes the network topology highly dynamic. Thus, routes may break easily since the data session fails when one node moves out of the sensing range of its partner. Besides that, if overused, nodes tend to drain their power completely due to the limited battery life. That will result in a short...
This paper proposes a path discovery scheme which supports delay-constrained least cost routing in MANETs. The aim of the scheme is to maximise the probability of success in finding feasible paths while maintaining communication overhead under control in presence of information uncertainty. The problem is viewed as a partially observable Markov decision process (POMDP) and is solved using an actor-critic...
Mobile ad-hoc networks (MANET) have found strategic importance in real world applications like environment management, remote explorations, disaster and warfare conditions due to their dynamic, self tailoring and adaptive nature. These networks can be quickly deployed in situations where no infrastructure exists. Effective use of these networks is largely dependent on secure and reliable behavior...
In recent years, a variety of new routing protocols have been developed in order to increase the performance of ad hoc, mobile networks. Each protocol more or less based on different strategy. TCP which basically designed for wireline networks faces difficulties in ad hoc wireless networks. In this paper we analyze the performance of well-known protocols under most known TCP versions with two widely...
There has been a lot of research effort on developing reactive routing algorithms for mobile ad hoc networks (MANETs) over the past few years. Most of these algorithms consider finding the shortest path from source to destination in building a route. However, this can lead to some network nodes being more overloaded than the others. In MANETs resources, such as node power and channel bandwidth are...
In off-line packetized streaming, rateless forward error correction (FEC) codes spectacularly improve the reliability of transmission over lossy networks. This success relies on time diversity, which in its turn relies on unrestricted buffering time at the receiver. In realtime streaming the playback buffering time is very limited (shorter than one second) and even strong FEC codes cannot protect...
In this paper the new algorithm to improve the performance of data delivery percentage over Bangkok Train System Network (BTSnet) is presented. BTSnet can be implemented in regular traffic patterns by the public transportation authority to improve the performance of mobile ad hoc networks (MANET) for inter-vehicular communication systems (IVCS) in Bangkok. Since ad hoc networks consist of mobile nodes...
Mobile ad-hoc networking (MANET) facilitates wireless devices to communicate with each other directly or via multiple hops without utilising existing infrastructure. Due to mobility of the nodes, possible sparse population, limited transmission power, and node failure, ad hoc networks are prone to performance degradation. To address the potential performance degradation non-randomness was introduced...
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