Mobility analysis of mobile hosts with random walking in ad hoc networks

2007 ◽  
Vol 51 (10) ◽  
pp. 2514-2528 ◽  
Author(s):  
Supeng Leng ◽  
Liren Zhang ◽  
Huirong Fu ◽  
Jianjun Yang
Keyword(s):  
Ad Hoc Networks ◽  
Ad Hoc ◽  
Random Walking ◽  
Mobility Analysis ◽  
Mobile Hosts ◽  
Hoc Networks

Data Caching in Mobile Ad-Hoc Networks

2007 ◽  
pp. 172-177 ◽  
Author(s):  
N. Chand
Keyword(s):  
Wireless Networks ◽  
Ad Hoc Networks ◽  
Mobile Ad Hoc Networks ◽  
Information Transfer ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Mobile Users ◽  
Mobile Hosts ◽  
Mobile Ad Hoc ◽  
Hoc Networks

Mobile wireless networks allow a more flexible communication structure than traditional networks. Wireless communication enables information transfer among a network of disconnected, and often mobile, users. Popular wireless networks such as mobile phone networks and wireless local area networks (LANs), are traditionally infrastructure based—that is, base stations (BSs), access points (APs), and servers are deployed before the network can be used. A mobile ad hoc network (MANET) consists of a group of mobile hosts that may communicate with each other without fixed wireless infrastructure. In contrast to conventional cellular systems, there is no master-slave relationship between nodes, such as base station to mobile users in ad-hoc networks. Communication between nodes can be supported by direct connection or multi-hop relays. The nodes have the responsibility of self-organizing so that the network is robust to the variations in network topology due to node mobility as well as the fluctuations of the signal quality in the wireless environment. All of these guarantee anywhere and anytime communication. Recently, mobile ad-hoc networks have been receiving increasing attention in both commercial and military applications.

scholarly journals Survey of mobile ad hoc networks (manets)

2019 ◽  
Vol 8 (02) ◽  
pp. 24484-24490
Author(s):  
Abdulghani Saif Kasem Mohammed ◽  
Khalid Hamid Bilal
Keyword(s):  
Ad Hoc Networks ◽  
Mobile Ad Hoc Networks ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Multipath Propagation ◽  
Mobile Nodes ◽  
Mobile Hosts ◽  
Mobile Ad Hoc ◽  
Hoc Networks

Mobile Ad Hoc Network (MANET) is the one of the type of ad hoc network, the MANET is a collection of two or more devices or nodes or terminals with wireless communications and networking capability that communicate with each other without the aid of any centralized  administrator also the wireless nodes that can dynamically form a network to exchange information without using any existing fixed network infrastructure. And it's an autonomous system in which mobile hosts connected by wireless links are free to be dynamically and sometime act as routers at the same time, In MANET, the mobile nodes require to forward packets for each other to enable communication among nodes outside of transmission  range. The nodes in the network are free to move independently in any direction, leave and join the network arbitrarily. Thus a node experiences changes in its link states regularly with other devices. Eventually, the mobility in the ad hoc network, change of link states and other properties of  wireless transmission such as attenuation, multipath propagation, interference etc. This paper discuses   study of Mobile ad-hoc Networks (MANET): classification, characteristics, structure of  MANET  and challenges that are imposed by Mobile ad-hoc Networks.

DATA DISSEMINATION METHODS FOR TIME-CONSTRAINT APPLICATIONS IN MOBILE AD HOC NETWORKS

2008 ◽  
Vol 09 (04) ◽  
pp. 351-367 ◽  
Author(s):  
TAKAHIRO HARA ◽  
SANJAY KUMAR MADRIA
Keyword(s):  
Ad Hoc Networks ◽  
Mobile Ad Hoc Networks ◽  
Ad Hoc ◽  
Data Dissemination ◽  
Heavy Traffic ◽  
Original Data ◽  
Data Availability ◽  
Mobile Hosts ◽  
Mobile Ad Hoc ◽  
Hoc Networks

In mobile ad hoc networks (MANETs), data replication is essential for improving data availability. In our previous work, we proposed a few updated data dissemination methods to refresh old replicas efficiently in MANETs. These methods disseminate updated data items every time when owners of original data items update the items or every time two mobile hosts are newly connected with each other and this causes heavy traffic in the entire network. In this paper, we assume applications that periodically execute read operations with strict deadlines to data items and propose several alternative updated data dissemination methods. These methods reduce the traffic for data dissemination while keeping a high success ratio for read operations.

REPLICA LOCATION MANAGEMENT FOR DATA SHARING IN MOBILE AD HOC NETWORKS

2006 ◽  
Vol 07 (01) ◽  
pp. 75-89 ◽  
Author(s):  
TAKAHIRO HARA
Keyword(s):  
Ad Hoc Networks ◽  
Ad Hoc ◽  
Data Access ◽  
Data Accessibility ◽  
Mobile Hosts ◽  
Replica Allocation ◽  
Replica Location ◽  
Key Issues ◽  
Past Data ◽  
Hoc Networks

To improve data accessibility in ad hoc networks, we have proposed a few methods of replicating data items on mobile hosts by considering the data access frequencies from mobile hosts to each data item and the network topology. In this paper, we address techniques to manage locations of data items or replicas and efficiently forward access requests to the locations. In order to manage locations of data items efficiently, a key issues is predicting the locations of data items that dynamically change. To predict the locations of data items, we use the information on replica allocation at every relocation time and the logs of past data accesses.

scholarly journals Routing Protocol using Fuzzy Logic for Vehicular Ad-Hoc Networks

2019 ◽  
Vol 8 (2) ◽  
pp. 4789-4794
Keyword(s):  
Fuzzy Logic ◽  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Routing Protocol ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Mobility Model ◽  
Central Administration ◽  
Mobile Hosts ◽  
Hoc Networks

An ad hoc network is a set of wireless mobile hosts which form a provisional network without the help or central administration of an existing infrastructure. An Ad Hoc vehicle network (VANET) utilizes shifting cars as portable network servers are created. Each involved unit becomes a mobile router with a VANET. The technique of networking of VANET is fast and versatile investments of equipment and VANET will not be restricted by set topology. A big number of road based implementation of portable apps ranging from the dissemination of vehicle warning and vibrant path scheduling to the promotion of context and file sharing are anticipated to assist VANET. The primary issues are: routing, broadcasting, service quality (QoS), collision avoidance, traffic optimization, network management, low error tolerance, security. The most important issues are: The design of an effective VANET routing protocol is very difficult; a relatively more stable routings must be established by the routing protocol. A range of road protocols was developed to deal with the problem of routing. Several protocols do not influence the stream of vehicles through the longest track between the origin and the target. VANET routing protocols efficiency is dependent on different parameters, such as mobility model, operating atmosphere, and many more. Fuzzy logic has been used in the protocol planning studies for wireless Ad Hoc networks, given that it is nice to choose the highest secure path from the notion of the fuzzy sets. In the draft job fuse oriented routing protocol the car lifetime, car number of cars travelling along the same lines and the distance between the stubble regarded three significant considerations for track choice are taken into consideration.

Clustering by Swarm Intelligence in the Ad-Hoc Networks

2014 ◽  
Vol 5 (3) ◽  
pp. 1-13 ◽  
Author(s):  
Bakhta Meroufel ◽  
Ghalem Belalem
Keyword(s):  
Particle Swarm Optimization ◽  
Ad Hoc Networks ◽  
Clustering Algorithm ◽  
Ad Hoc ◽  
Hierarchical Organization ◽  
Central Administration ◽  
Swarm Optimization ◽  
Mobile Hosts ◽  
Replication Strategy ◽  
Hoc Networks

An Ad-hoc wireless is composed mainly of mobile hosts that communicate with each other without fixed infrastructure and no central administration. The main problems associated with these networks are the unpredictable mobility of hosts and a modest flow of communication. In this context, a major problem is partitioning the network in groups called clusters, giving a hierarchical organization. This work presents a deterministic self-stabilizing clustering algorithm for Ad-Hoc networks based on PSO (Particle Swarm Optimization). The proposed approach creates clusters and controls the nodes mobility to ensure more stability for the system. To increase the network life and reduce the answer time of user queries, it proposed also a replication strategy based on the non-similarity degree. The simulations show that the cooperative approaches (clustering, mobility and replication) minimize the energy consumption and increase the QoS of the system.

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