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A Framework for Integrated Routing, Scheduling and Traffic Management (FIRST) in Ad Hoc Networks is introduced. Unicast and multicast routes are established in coordination with the scheduling of transmissions and bandwidth reservations in a way that bandwidth and delay guarantees can be enforced on a per-hop and end-to-end basis. Results from detailed simulation experiments show that, compared to...
In the recent years, the use of real-time Ethernet protocols becomes more and more relevant for time-critical networked industrial applications. In this context, this paper presents a method to compute the worst-case packet delays on switched Ethernet. Based on an evaluation of the packet delays at each switch port and the network topology, we construct a weighted directed graph that allows to find...
In this paper we present an idea for guaranteed performance in real time video communication with error resiliency. The idea carries three main concepts called connection establishment with user defined performance parameters, back pressure re-routing and error resiliency by feedback control. The performance parameters we consider here are time delay and bandwidth. Establishing a connection that gives...
In wireless sensor networks (WSN), individual sensor nodes are inherently unreliable and have very limited capabilities to ensure real-time properties. In fact, one of the most predominant limitations in wireless sensor networks is energy consumption, which hinders the capacity of the network to provide real-time guarantees (e.g. low duty-cycles, low transmission range). Many approaches have been...
The paper has proposed the QoS route mechanism of the sensor network based on task delay and priority. The new control mechanism assigns the network resource proportionately according to the different priorities of tasks. The tasks with a higher priority can obtain more network resource in respect to the tasks with a lower priority, which will guarantee that the information of task occurrence can...
Mobile IPv6 supports a global mobility solution in wireless networks. The mobile node is unable to send or receive packets during handover, due to link switching delay and IP protocol operations. This handover latency is caused by standard mobile IPv6 procedures, such as movement detection, new care of address configuration, and binding update. This configuration is the most time-consuming phase,...
Topological routing is an alternative to traditional routing methods such as table routing or pre-calculated paths techniques, and it has been implemented for many different regular topologies such as Grid, Double Ring, Honeycomb or N2R. In relation to the Grid, topology under study in this paper, very good results have been achieved obtaining fast and reliable routing. This paper proposes the combination...
A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes...
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