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For realtime teleoperation with haptic feedback, network-induced artifacts like delay, packet loss and lossy coding of haptic data deteriorate the operability of the system. We provide a systematic quantification of the limits within which, these network-induced degradations are tolerable for human task performance in executing a given haptic task. These limits are conservative in the sense that we...
Network coding is an emerging and powerful solution that can significantly improve the throughput and power efficiency of wireless networks by allowing mixing of various traffic flows into a single packet. However, when network coding is applied, a packet will have to wait to be network-coded with others, which may result on large delay and packet-loss rate. It will bring negative influence to the...
The smart grid applications requires real time analysis, response within the order of milliseconds and high-reliability because of the mission critical structure of the power grid system. The only way to satisfy these requirements is in-network data analysis and built-in redundancy routing for failures. To achieve this, we propose a data dissemination system that builds routes using network flow algorithms,...
High speed and low power transceivers start to be used for global interconnection in state-of-the-art System-on-Chips (SoCs). In traditional transceivers, the bandwidth is largely dependent on the clock rate. This paper presents a clock-less transceiver for global interconnect. The asynchronous transceiver makes the data rate only depend on the link delay and can be conveniently used with low swing...
Any physical channel of communication offers two potential reasons why its capacity (the number of bits it can transmit in a unit of time) might be unbounded: (1) (Uncountably) infinitely many choices of signal strength at any given instant of time, and (2) (Uncountably) infinitely many instances of time at which signals may be sent. However channel noise cancels out the potential unboundedness of...
An enhanced bandwidth extension scheme is introduced in this paper for wideband speech coding using ADPCM. The coded lower band signal plus small side information (some parameters) are transmitted instead of the whole band. In the decoder both frequency parts are reconstructed from the coded signal and the received parameters. In the proposed method, the high frequency part is derived from the excitation...
In order to improve the throughput and transmission reliability in wireless sensor network with limited resources, multicast network coding technology is imported in. On this basis, through random linear network coding by nodes' cooperation to make improvement in delayed and expense. The simulation results show that the transmission, to the opportunity routing, by cooperation network coding strategies...
In wireless sensor networks (WSNs), the functions of data dissemination are distributing codes to destination nodes and update their function. Because of the limitation of the sensors' power in WSNs, the process of data dissemination should be reliable and quick. Considering network coding has many advantages such as strong practicality, simple operation and fitting for robust and distributed transmission,...
Network coding can greatly improve the throughput and power efficiency of wireless networks by mixing packets from different flows into a single one before forwarding. However, packets need to wait for its correspondences before coding, which may induce additional delay and packet loss. Considering the diversity of traffic flows and the stochastic nature of the packet arrival process in wireless networks,...
Energy saving is important for many wireless devices. In a multi-hop wireless network with multiple sessions, XOR network coding can be applied to opposite traffic flows so as to reduce the number of packet transmissions, which in turn reduce transmission energy. Such a change in packet forwarding, however, impacts the design of traffic routing. Traditional routing algorithms, which typically aim...
High-frequency (HF) radio communication has been recognized as the primary means for long-range wireless communications since the advent of radio. With its unique features, HF communication continues to be used for a wide range of civilian, government and military applications as a powerful alternative to a myriad of more sophisticated communication systems. However demanding requirements of high-speed...
We propose a new scheme for reliable transport, both for unicast and multicast flows, in Delay Tolerant Networks (DTNs). Reliability is ensured through the use of Global Selective ACKnowledgements (G-SACKs) which contain detailed (and potentially global) information about the receipt of packets at all the destinations. The motivation for using G-SACKs comes from the observation that one should take...
In this paper, we study the effect of packet feedback loss events on the broadcast completion delay performance of instantly decodable network coding. These feedback loss events result in a continuous lack of knowledge about the reception status at different subsets of receivers. This lack of knowledge creates a challenge in selecting efficient packet combinations in subsequent transmissions. To solve...
Network coding has been shown to be able to improve the throughput and power efficiency of wireless networks by mixing packets from different flows into a single packet. However, forcing packets to be coded may induce large delay and packet loss rate which is intolerable to some services such as real-time communications. Considering the diversity of traffic flows and the stochastic nature of the packet...
In this work a new efficient modulo 2n+1 modified Booth multiplication algorithm for operands in the weighted representation is proposed. According to our algorithm n/2+2 partial products are derived. The resulting partial products are reduced by an inverted end around carry save adder tree to two operands, which are finally added by a diminished-1 modulo 2n+1 adder. Our design compares favorably...
This paper proposes a Numeral-Based Crosstalk Avoidance Coding (NB-CAC) to protect communication channels of Network-on-Chips (NoCs) against crosstalk faults. The NB-CAC scheme produces code words without bit patterns '101' and '010' to eliminate harmful transition patterns from NoC channels. This is done by the use of a new numeral system proposed in the paper. Using the proposed numeral system,...
Work reported herein contributes to the prediction of achievable performance of the IEEE 802.16 standard using time series of 50 Mchps PN channel sounder measurements at 4.9 GHz on radio channels in a scenario in which emergency vehicles are parked outside a building and operate as a centre for communications with rescue crews and equipment inside the building. Predicted error rates are presented...
The paper proposes a resource efficient solution for Network Coding (NC) based congestion control consisting in identification around the congested links of multiple butterfly topologies by using the Discrete Lagrange Multiplier optimization algorithm. The instantiation of the butterfly topologies is based on the resource management capabilities foreseen for the entities of the future networks. The...
In Deep-submicron (DSM) and Very Deep-submicron (VDSM) technologies, Scaling the minimum feature size of VLSI circuits has caused the crosstalk noise to become a serious problem, degrading the performance and reliability of high speed integrated circuits. In many digital processors and SoC interconnects and buses are dominating the silicon area than the logic. These interconnects are prone to errors...
The wireless mesh networks traffic is of self-similarity and the network performance is degraded by self-similar traffic. Network coding is a new technology which improves networks performance. In this paper, an algorithm was presented that used network coding to reduce the queue length and the delay time when self-similar traffic was occurred. The algorithm was based on synchronization after data...
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