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It will cause the loss of information in the distributed satellite networks, if the network node is failure. For this problem, a method for distributed satellite networks based on standby nodes is presented in this paper. Firstly, it can establish a main path and confirm main nodes according to max-throughput principle in this method. Secondly, it can establish standby nodes set for the main path...
The NoC Architecture plays crucial role while designing communication systems for System on Chip (SoC). The NoC architecture is improved over conventional bus, shared bus design and cross bar interconnection architecture for on chip networks. In order to improve the Quality of Service, Congestion, Throughput and latency in NoC, Hexagonal node based architecture is proposed in our previous paper[14]...
In wireless sensor networks (WSNs) energy balancing and energy efficiency are the key requirements to prolong the network lifetime. In this paper, we investigate the problem of energy hole, where sensor nodes located near the sink or in some other parts of the network die very early due to unbalanced load distribution. Moreover, there is a dire need to utilize the energy resource efficiently. For...
An adhoc network is collection of wireless mobile hosts, which form a temporary network by using reconfigurable structure that means it doesn't use fixed infrastructure to form a temporary network. It will connect all nodes through wireless technique. Hence it can change the link between one node to another node during run time, when the link failure problem occurs. There is a limited range for each...
Due to the limited battery capacity of sensor nodes, a minimization of energy consumption is a potential research area in underwater wireless sensor networks (UWSNs). However, energy hole and coverage hole creations lead performance degradation of UWSNs in terms of network lifetime and throughput. In this paper, we address the energy hole creation issue in depth-based routing techniques, and devise...
In recent days, the Mobile Adhoc Network (MANET) plays a vital role in networking research environment for sharing information from one to others. MANET is a mobile, which is formed by radio waves without any desirable base stations. The main issue of Destination Sequenced Distance Vector Routing Protocol (DSDV) is routing overhead continuously, because it maintains the up-to-date information during...
Wireless mesh networks(WMNs) have excellent communication capabilities and quality of easy deployment which increases popularity of WMNs. WMNs have an essential routing protocol which facilitates healing of link between Mesh Routers and the Mobile Nodes. Multiple interfaces of Mesh Routers is used for healing the path between the Mesh Routers and the Mobile Node in Mesh Network. Reactive protocols...
Mobile ad-hoc networks are commonly known as MANETs. This type of network consists of nodes which are independent, mobile and also able to exchange messages between themselves. These nodes rely on limited battery; a common challenge in MANETs. As soon as battery power of node is used up, that node becomes a dead node. This node is not able to send or receive data. When all network nodes have used...
Mobility of nodes causes frequent link breaks and decreases the performance of routing protocols in Mobile Ad hoc Networks. Overhearing of packets can be used as a passive update mechanism for routing and alternate route tables. Hello messages are used to discover the new neighbor nodes and refresh the routing entries. Proper neighbor node selection by upstream nodes is an important issue during link...
AODV is reactive routing protocol, used in MANET that establishes route between source and destination, whenever the source has data to send to the destination and there is not any route between them. Since nodes are moving route breaks because nodes are out of coverage of the neighboring nodes. After route break RERR messages are circulated to all the nodes, due to RERR messages traffic increases...
Assurance network technologies are necessary to realize trustable terminal/infrastructure service applications. Heterogeneous requirements are independently generated for assurance networks. In real situations, nodes are not uniformly distributed in networks, and it is assumed that there are dense and sparse areas. This difference of node densities will be serious in the large scale networks. When...
In case of high dynamic topology, reactive routing protocols provide quick convergence by faster route discoveries and route maintenance. Frequent broadcasts reduce routing efficiency in terms of broadcast cost; Bk, and expected time cost; E[t]. These costs are optimized using different mechanisms. So, we select three reactive routing protocols; Ad-hoc On-demand Distance Vector (AODV), Dynamic Source...
Ad hoc On-demand Distance Vector (AODV) is a routing schema for delivering messages in a connected Mobile Ad hoc Network (MANET). Connectivity between any sources to destination pair in the network exists when they are in radio range of each other. Local Repair is an important issue in routing protocol which is needed for minimizing flooding and performance improvement. Routes can be locally repaired...
In this paper, we evaluate, analyze, and compare the impact of mobility on the behavior of three reactive protocols (AODV, DSR, DYMO) and three proactive protocols (DSDV, FSR, OLSR) in multi-hop wireless networks. We take into account throughput, end-to-end delay, and normalized routing load as performance parameters. Based upon the extensive simulation results in NS-2, we rank all of six protocols...
This paper addresses the problem of multipath routing in hybrid wireless mesh networks. We study the use of clustering algorithms to facilitate the discovery and deployment of non-interfering multipath routes in these settings. In this context we propose a novel combination of clustering and routing techniques aiming at minimizing interferences between transmissions of neighbouring nodes. We provide...
In mobile ad hoc networks, the status of the network changes over time due to the movement of terminals, the battery level of terminals, and so on. To construct assurance networks, it is necessary to consider requirements such as dependability, security, and adaptability against changes in the network. We had proposed a routing method, which is referred to as RSR (Route-Split Routing) for mobile ad...
In mobile ad hoc networks, the status of the network changes over time due to the movement of terminals, the battery level of terminals, and so on. To construct assurance networks, it is necessary to consider the requirements such as dependability, security, and adaptability against the change of the network. We have proposed a new routing method, which is referred to as MLR (Micro Loop Routing) for...
Routing protocols for wireless mesh networks (WMN) are traditionally focused on finding paths with the minimum hop count. In WMN the main goal is to achieve as the best possible quality and efficiency of data transmission between source and destination nodes as possible. To achieve such transmission, different parameters (power consumption, packet loss, delay, etc.) influencing data transmission need...
The number of nodes within 1-hop range plays an important role in determination of ad-hoc network performance. The more the number of 1-hop neighbor increases, the more routing traffic is generated. Although there have been several studies on the optimal number of 1-hop neighbor nodes, they had not considered routing overhead. In this study, we derive new optimal number of 1-hop neighbor nodes to...
In this paper, we propose three heuristics for high-efficiency selections of MPRs (multipoint relays) in link state QoS routing protocol: MIMS (maximizing integration metric selection), MQES (maximizing QoS-efficiency selection), and MCIS (minimizing cost-inefficiency selection). The basic approach of these selections is to determine a smaller set of MPRs that provide better QoS paths between any...
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