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Data transmission capacity of ad-hoc wireless networks could be increased by using multi-path transmission and minimising mutual interference between nodes. This approach could also be used to extend D2D communication opportunities in 5G. The objective of this paper is theoretical analysis and computer simulation to reveal the best conditions for combining smart antennas and multi-path transmission...
Aimed at the inapplicability of LEACH protocol for large-scale sensor network and uneven energy consumption, a Distributed Self-organizing Clustering Routing protocol (DSCR) for large-scale sensor network is proposed. Based on clustering, the network routing is divided into two levels: parent cluster and cluster. The cluster structure is formed by the back-off mechanism related to the residual energy...
The combination of Device-to-Device (D2D) Communication in 5G Cellular Networks and vehicular networks will not only increase the performance of vehicular networks, but also increase the revenues for network operators and services providers. This paper proposes a 5G D2D routing method oriented to vehicular networks, which can increase the connectivity and scalability of vehicular networks while alleviating...
In mobile Cognitive Radio Networks (CRNs), the frequent link breakage and wireless interference urged the need for novel stable routing solutions. In this paper, we propose STAR, a stable routing protocol that aims at selecting interference-free and durable paths. We investigate the particular Hidden interfering Primary User (HIPU) problem caused by the un-detectable presence of the primary user in...
With the development of wireless transmission technology, the coexistence of a variety of network protocols is inevitable in industrial control networks for a certain period of time. Due to the lack of a necessary coordination mechanism between different network protocols, this may impact the transmission performance of the backhaul network connecting several subnetworks with different protocols when...
Among the high-radix and low-diameter networks, fat-tree topology is commonly used in HPC and datacenter systems. Resource and job management is critically important to mitigate application interference in order to achieve high system performance and utilization. Preliminary studies have shown the effect of job placement on parallel scientific applications performance. In this work we study interference...
This work evaluates performance variability in the Cray Aries dragonfly network and characterizes its impact on MPI Allreduce. The execution time of Allreduce is limited by the performance of the slowest participating process, which can vary by more than an order of magnitude. We utilize counters from the network routers to provide a better understanding of how competing workloads can influence performance...
HPC systems have shifted to burst buffer storage and high radix interconnect topologies in order to meet the challenges of large-scale, data-intensive scientific computing. Both of these technologies have been studied in detail independently, but the interaction between them is not well understood. I/O traffic and communication traffic from concurrently scheduled applications may interfere with each...
Dragonfly network is widely used in modern high-performance computing systems. On this network, however, interference caused by network sharing can lead to significant network congestion and degraded performance. In this work, we present a comparative analysis of intra-application interference on applications with nearest neighbor communication, considering various placement strategies. Our results...
This paper applies the theory of Evolutionary Game to QoS routing algorithm for wireless mesh networks which can not only improve the performance of traditional QoS routing protocols but also be able to reduce the cost of the routing algorithm.
This paper presents an effective decoupling strategy to reduce radio frequency interference (RFI) noise from power plane of double data-rate (DDR) memory. Dual-referencing routing with both power and ground plane is widely used in DDR memory but prone to RFI radiation. Simulations are conducted to show a) self-resonance of capacitor significantly enhances effectiveness of decoupling, b) impedance...
In cellular networks, end-users receive wireless network services only by a base station (BS). Device-to-device (D2D) communication is a new paradigm in cellular network that enables end-users to communicate with each other in an ad hoc manner using single or multi-hops. The communication can be realized both with and without the support of the cellular network infrastructure. A major challenge associated...
The individual applications of network coded opportunistic routing and successive interference cancellation have been proven with significant improvement on throughput performance of wireless multi-hop networks, but there lacks practical optimization on their combination application. Based on a TDMA system, this paper models the throughput maximization as network utility function maximization problem...
The individual applications of network coded opportunistic routing and successive interference cancellation have been proven with significant improvement on throughput performance of wireless multi-hop networks, but there lacks practical optimization on their combination application. Based on a TDMA system, this paper models the throughput maximization as network utility function maximization problem...
The article develops an information rates estimation method for communication channels with known data delivery routes. Conclusion about the sufficiency of Gaussian probability model usage for describing the distribution of intra-system interference with a large number of simultaneously transmitted signals is made. Derived expressions allow to determinate signal-to-interference ratios for estimating...
Estimating the Quality of Transmission (QoT) of lightpaths is crucial for reducing provisioned margins, making optimized dynamic decisions, and localizing failures. We leverage a QoT estimation tool that uses feedback from the network in order to provide accurate QoT estimations. We propose a scheme to establish active monitoring lightpaths (i.e., probe lightpaths used only for monitoring purposes)...
By decoupling the control plane from the data plane and providing programmability for network applications, software-defined network (SDN) is positioned to offer more efficient management, higher flexibility and better performance. Routing and resource allocation are two closely related applications in wireless networks. With close cooperation, better performance and lower complexity can be achieved...
The key challenges of high-throughput data delivery in multi-radio multi-channel Wireless Mesh Networks (WMNs) are fluctuating channel conditions, dynamic traffic flows, co-channel interferences, congestion, etc. In this paper, we first formulate a mixed integer non-linear programming (MINLP) optimization framework that chooses, at each router, a number of outgoing link-channel pairs and allocates...
Fifth generation (5G) wireless networks will target at energy and spectrum efficient solutions to cope with the increasing demands in capacity and energy efficiency. To achieve this joint goal, dense networks of small cells (SCs) are expected to overlay the existing macro cells. In parallel, for the SC connection to the core network, a promising solution lies in a mesh network of high capacity millimeter...
In cognitive radio networks (CRNs), the established communication sessions between secondary users (SUs) may be affected or even get interrupted because the SUs need to relinquish the spectrum when the licensed users (PUs) appear and reclaim the spectrum/channel. On detecting PU activities, the SUs on the affected links either switch to another available idle spectrum using the same link or the SUs...
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