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A new scheme that serves to find a routing path for Wireless Sensor Networks (WSNs), with a view to facilitate an increase in the network life time is proposed in this paper. It envisages the network to be in the form of clusters and develops an algorithm for transfer of information within the nodes and to the remote Base Station (BS). The approach involves the use of Ad-hoc On Demand Distance Vector...
Cooperative Network Coding is a novel technology that synergistically integrates Network Coding with cluster-based Cooperative Communications to produce enhanced network reliability and security features, while improving the throughput. In this paper, we consider the effect of the connectivity on the performance of wireless sensor networks using Cooperative Network Coding, and we present scenarios...
Reliable event delivery at MAC, routing and transport level has been explored to great extent to provide improved throughput and route resilience in wireless sensor networks. The evolution of wireless sensor and actor networks (WSAN) have posed an extra constraint in terms of reliable event response. The reliable response is defined as the the in time event delivery from sensor nodes to actors and...
Cooperative Networking is a new technology which exploits the massive deployment of nodes in wireless sensor networks. Cooperative Networking synergistically integrates Networking with cluster-based Cooperative Communications to improve reliability and enhance network performance. In this paper, we consider the effect of link-level feedback and retransmissions on the performance of wireless sensor...
WSNs (wireless sensor networks) are networks that hundreds or thousands of nodes poured in a field and nodes try to send sensed event to base station (BS). In many cases, the BS isn't in the field and is so far away from nodes. Energy efficiency is one of the major concerns in wireless sensor networks since it impacts the network lifetime. So instead of transmitting directly to BS, in hierarchical...
The link quality based Collection Tree Protocol (CTP) has been demonstrated an efficient and reliable routing protocol for data collection networks that deploy a clustered tree topology. However, CTP measures the link quality by packet throughput rather than transmission latency, which is not appropriate for networks supporting sensor events with transmission time deadlines. In this paper, we propose...
This paper describes CoZi, a new packet scheduling mechanism for large scale ZigBee networks. CoZi aims at enhancing the reliability of the data delivery and the bandwidth utilization of the network. Based on simple network coding, instead of the classic packet forwarding, our algorithm takes advantage of the shared nature of the wireless medium as well as the cluster-tree topology of IEEE 802.15...
Wireless sensor networks are equipped with batteries with limited charge, and are often deployed in conditions that make their retrieval and replacement infeasible. Thus, energy conservation has been a primary consideration for protocol design for such networks. Recent advancements in the transfer of energy wirelessly over large distances, such as through radio frequency electromagnetic (EM) waves...
Protocols such as 6LoWPAN will soon directly connect the Internet to the rapidly growing number of deployed Low Power and Lossy Networks (L2Ns). The outcome will enable many novel applications, including new types of Cyber-Physical Systems, the “Internet-of-Thing”, the Smart Grid, etc. Due to resource constraints the performance of a L2N routing protocol is quite sensitive to changes in protocol parameters...
Lightweight Congestion Aware Reliable Transport protocol (LCART) is based on cross-layering the prevalent or reciprocal functionalities of Transport, MAC and Wireless-Physical layers in order to achieve energy efficiency and meeting QoS objectives of heterogeneous WSN1 including multimedia. LCART intelligently overcomes network congestion by the simultaneous use of Packet Service Time, Packet Inter...
Reliable communication is crucial for successful deployment of a wireless sensor network. Many environmental factors can affect the performance of radio links, and the deployment of a network without real-time information about link qualities can be a demanding task. This paper describes the CiNetView application that is intended to support the deployment and monitoring of wireless sensor network...
In this paper, we present a novel energy efficient routing protocol for wireless sensor networks in which the sensor nodes as well as the base station are mobile. The protocol is hierarchical and cluster based from network structure perspective. Each cluster contains one cluster head node and two deputy cluster head nodes. The re-clustering time and energy has been minimized by introducing the concept...
Continuous improvement in hardware design and advances in wireless communication have enabled the deployment of various wireless sensor applications. Though, sensor nodes are highly resource constrained in terms of limited processing speed, runtime memory, persistent storage, communication bandwidth and finite energy. Flash memory has become a more widespread storage medium for modern wireless devices...
Wireless sensor network (WSN) and wireless mesh network (WMN) suffer frequent disruptions and limited capacity for delivering sensor data in mine tunnels. A Braided Cooperative Reliable Transport (BCRT) algorithm which maintains one-hop reliability to insure end-to-end reliability is proposed. BCRT is not sensitive to route breaks, since it optimizes the data rate on every forwarding node and lost...
This paper provides a novel routing algorithm CLQR (Cumulative Link Quality Routing Algorithm) which leverages LQI to provide a better routing scheme. Unlike other schemes providing maximum link quality, CLQR does not use probe packets to measure the link quality. Instead it uses cumulative link quality as a metric to choose better routing path. Result of simulation shows that it can hold a high throughput...
Recently, mobility-assisted data collection has been proposed to prolong network lifetime. However, the upper bound of throughput capacity in such mobility-assisted data collection models has not been studied. In this work, we first derive the upper bound of throughput capacity when a mobile sink is available for data collection. Given the traveling speed of the mobile sink and the required delay...
Rapid penetration of small customized wireless devices and enormous growth of wireless communication technologies has already set the stage for large-scale deployment of wireless sensor networks. Offering precise quality of service (QoS) for multimedia transmission over sensor networks has not received significant attention. However offering some better QoS for wireless multimedia over sensor networks...
The congestions in wireless sensor networks have two types: link congestion and node congestion. The primary method for congestion avoidance is to control sending rate, through the mechanism of distribution rate and cache notification. Multi path is the primary method for guaranteeing transmission reliability in wireless sensor networks. Aiming at the node congestion, MPCN-multi path based on cache...
This paper introduces a method for lifetime/real-time optimization of wireless ad hoc networks. The method utilizes a network simulator to model the network signature for actual deployments and routing paths. Since the transmit power is fixed, many nodes may not save energy from communication. At the same time, all nodes save energy from calculations and the number of hops may be controlled. The network...
The estimation of communication links quality plays a critical role not only in sensor network routing protocol, but also in maintaining the sensor network. By evaluating the estimation, when identify some failures occurrence, mobile robots can be deployed to automatically move to the region to cover communication gaps. This paper presents a comprehensive metric to evaluate the links quality and the...
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