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In this paper, we study the performance of two cross-layer optimized dynamic routing techniques for radio interference mitigation across multiple coexisting wireless body area networks (BANs), based on real-life measurements. At the network layer, the best route is selected according to channel state information from the physical layer, associated with low duty cycle TDMA at the MAC layer. The routing...
Opportunistic routing (OR) has emerged as a promising paradigm to the design of routing protocols for underwater sensor networks (UWSNs). However, despite of its advantages, it introduces a critical problem that has been neglected until now: the immutable transmission priority level of the next-hop forwarding nodes. This characteristic can lead to an overuse of a unique node (or a few of them), quickly...
Multiple routing metrics have been proposed for maximizing throughput or guaranteeing reliable delivery of the data. Some of the most common used metrics, neglect the bursty behavior of the channel. A new metric improve this by taking burstiness into account. This creates a burst estimation of all links and allocates the maximum number of required slots in worst-case. Even though this is a solution...
Large number of Sensor nodes which are distributed over a geographical area and connected via Wireless medium is called Wireless Sensor Network. Low energy consumption is a major design constraint for battery operated embedded systems such as wireless sensor networks. In order to reduce energy consumption path selection plays a major role. The proposed system Parameter Based Reliable Routing (PBRR)...
Wireless sensor network(WSN) contains a number of sensor nodes distributed in the sensor field. Sensor nodes gather information from the environment, process them and then transmit data to the sink node. To send data from the source node to sink node require efficient routing algorithm. This routing algorithm plays important role in WSN is to finding a reliable path for a data transmission in the...
This paper addresses the issue of reliable data delivery in highly dynamic Mobile Ad-hoc Networks (MANETs). Most existing MANET routing protocols are susceptible to data delivery in reliable and timely manner. To counter this problem, Position-based Greedy Forwarding protocol (PGF), a novel GR protocol which takes advantage of greedy forwarding and opportunistic routing is proposed. In PGF, the best...
In this paper we study the application of Diversity Coding to enable near-instantaneous recovery from link failures in 5G Centralized Radio Access Network (C-RAN) networks. We focus on networks where remote radio heads in a C-RAN are connected to the baseband unit with wireless fronthaul links. In order to avoid retransmissions and rerouting delays due to link failures, we investigate use Diversity...
How to improve communication effectiveness of command and control organization is one of the core issues to be addressed in the network-centric warfare. This paper is to build a mathematical modeling from three communication effectiveness metrics: communication cost, network delay and reliability. Information capacity and delay demands based on task are also needed to constrain the target. Genetic...
Routing and wavelength assignment (RWA) is one of the vital optical network issues of optical networks. With the tradeoff between the idle ratio and reliability of the candidate route, this paper researches a dynamic RWA algorithm for optical networks by introducing a factor of RWA dynamic weight to reach high demands of transmit speed and transmit quality. With the comprehensive consideration of...
Several approaches are introduced to increase the throughput and reliability of Multistage Interconnection Networks (MINs), mostly by changing the network architecture. When multiple sources in such a network try to send data, collision of packets and blocking problems are inevitable. Time division multiple access (TDMA) protocol are used to address these issues. However, TDMA protocol based on fixed...
WiFi-based Long Distance (WiLD) networks have emerged as a promising alternative approach for Internet in rural areas. The main hardware components of these networks are commercial off-the-shelf WiFi radios and directional antennas. During our experiences with real-world WiLD networks, we encountered that interference among long-distance links is a major issue even with high gain directional antennas...
The thermal problem is a challenge in recent Network on Chip (NoC) designs due to its great impact on the network performance and reliability, especially for 3D NoC. In this work, we design a virtual channel based fully adaptive routing algorithm for the runtime 3D NoC thermal-aware management. For throttling information collection, instead of transmitting the topology information of the whole network,...
We provide a lightweight decentralized publish-subscribe framework for supporting large-scale actor communication on edge networks. Our framework, called Loquat, does not depend on any reliable central nodes (e.g., data centers), provides reliability in the face of massive node failures and network partitioning, and provides scalability as the number of nodes increases. We consider that high reliability,...
Many common DTN routing protocols are replication-based, which have relatively good performance in terms of message delivery ratio but high overhead, and leave the issue of garbage collection open. In this paper, we propose Named Data Distance Routing (NDDR), a named data based DTN routing approach which makes routing decisions for named data based on topological distance information. This helps to...
Mobile Ad hoc Network has a wide range of applications in military and civilian domains. It is generally assumed that the nodes are trustworthy and cooperative in routing protocols of MANETs viz. AODV, DSR etc. This assumption makes wireless ad hoc network more prone to interception and manipulation which further open possibilities of various types of Denial of Service (DoS) attacks. In order to mitigate...
The advance of technology in wireless sensor networks is increased nowadays. In this network, minimizing the battery consumption is most enormous challenge. For reliable data transmission, effective routing is required. In this work, an efficient node infirmity tracking scheme with stable supportive route for reliable data transmission is proposed. Problem Statement: Sensor nodes sense the data and...
On — chip communication suffer from bit error especially at highly dense implemented system on chip. Reducing the rate of bit error in On-chip communication is carried out by error detection and correction codes. But it has its own limitation. So reconfigurable multiple code based system is suitable for heterogeneous system design. But selecting correct code for the correct subsystem or for current...
When the use of wireless sensors network is becoming increasingly wider and deeper, its problems are also beginning to highlight. Due to the limit of wireless sensors' energy supply and the unstable channel, ensuring the reliability and speed of the transmission has become the research hot spot. With multipath or retransmission transmission mechanism, the redundancy of data transmission can be ensured...
A Wireless Sensor Network is an assortment of nodes organized into a cooperative network. Wireless Sensor Networks (WSNs) are subjected to node failures because of energy constraints; also nodes can be added to or removed from the network upon application demands, leading to unpredictable topology changes. Bursty traffic resulted from the detected events will simply cause congestion within the networks,...
In deep waters, both the natural acoustic systems (such as marine mammals) and artificial acoustic systems (like underwater sensor networks (UWSNs) and sonar users) use acoustic signals for communication, echolocation, sensing, and detection. This makes the channel spectrum, heavily shared by UWSNs posing several salient features such as narrow bandwidth, long propagation delay, and high packet loss...
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