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We propose partial and full link reversal algorithms to bypass voids during geographic routing over duty-cycled wireless sensor networks. We propose a distributed approach that is oblivious to one-hop neighbor information. Upon termination of the algorithm, the resulting network is guaranteed to be destination-oriented. Further, to reduce the delays incurred under reactive link reversal, we propose...
Two-degree ROADM can be upgraded to next generation dynamically reconfigurable multi-degree OADM using an N??1 Wavelength Select Switch (WSS). WSS enables routing of selected wavelengths from a (local) degree to N (remote) degrees. In a typical multi-degree configuration, WSS sitting on individual degrees are connected back-to-back. This paper describes the design of a new protocol to run over an...
Maximizing the lifetime of wireless sensor networks under constrained resources is an interesting problem that has gained increasing attention. Most methods assume an ideal link layer model when increasing the lifetime of wireless sensor networks and energy saving techniques using geographic routing remains largely unexplored. Based on a realistic link layer model, we propose a novel geographic routing...
10 GbE connectivity is expected to be a standard feature of server platforms in the near future. Among the numerous methods and features proposed to improve network performance of such platforms is direct cache access (DCA) to route incoming I/O to CPU caches directly. While this feature has been shown to be promising, there can be significant challenges when dealing with high rates of traffic in...
Broadcasting is the fundamental operation of mobile ad hoc network, in which a source node transmits the packets that is disseminated to all the nodes in the network. Broadcasting is used in mobile ad hoc network either to broadcast control packets during route discovery or to broadcast the data packets. The simplest method used for broadcast is flooding that degenerates the performance of MANET due...
Energy-aware routing is important in multi-hop wireless networks that are operated by battery power, e.g., wireless sensor networks. To maximize the network survivability, the energy efficiency of paths must be taken into account for route selection. Simple heuristics such as choosing paths with minimal energy consumption do not perform well, because the energy of the nodes on such paths may deplete...
Current on-chip networks use a packet-switched design with a complex router at every hop, which imposes significant communication energy, delay, and throughput overhead. we propose reducing energy and delay, and increasing throughput, using express virtual channels. packets traveling along these virtual express lanes, which connect distant nodes in the network, bypass intermediate routers, significantly...
Unlike ad hoc networks where traffic is randomly distributed among every pair of nodes, the traffic in wireless mesh networks (WMNs) is predominantly toward or from the Internet Gateways (IGWs)for Internet services. Due to this, interference and collision are more serious in the Mesh Router (MRs) closer to the IGWs and the Internet throughput of the network is limited by the number of orthogonal channels...
Packet scheduling is a critical component of router data paths because it allows routers to divide bandwidth intelligently between competing flows. A large number of scheduling algorithms annotate packets with time stamps and subsequently sort these packets according to their annotated time stamp values. For these algorithms the problems of efficiently tagging and sorting packets are still open to...
This paper proposes a new heterogeneous multi-hop cellular IP (MCIP) network that integrates multi-hop communication with cellular IP. MCIP increases the coverage of the wireless network and improves the network robustness against adverse propagation phenomena by supporting communication in dead zones and areas with poor radio coverage. MCIP includes three components: location management, connection...
This paper deals with a natural disasters management system based on location aware distributed sensor networks. Optimal path discovery for routing of information packets is an essential means to achieve maximum life-time in wireless sensor networks. The authors propose a system based on hierarchical transmission of packets from sensor nodes to the base station by identifying a path from one head...
Mobile ad hoc networks are infrastructure-free, pervasive, ubiquitous and without any centralized authority. These unique characteristics, combined with security threats, demand solutions for securing ad hoc networks prior to their deployment in commercial and military applications. So far, the research in mobile ad hoc network has been primarily focused on routing and mobility aspects rather than...
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