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Smart grid (SG) has been recognized as a promising solution to manage and distribute electricity in the next generation power systems. The large number of devices in power systems make the wired communication a non feasible solution, thus wireless transmission becomes necessary. However this demands a huge portion of radio spectrum. In this work, we aim to provide the secure and reliable SG communication...
This paper proposes an adaptive method to modify network delay caused by clock skew. First, we introduce the concept of end-to-end network delay, and then we propose a method which aims at eliminate the effect cause by the difference clock frequency. The method first denoises the data set to remove error points, and then uses Least Square Method to estimate the clock skew in distributed network. Finally,...
Time mode signal processing (TMSP) is the implementation of analog signal processing functions using the most basic element available, namely, propagation delay. Moreover, a time to digital converter (TDC), an important block of time mode circuits, could be used to convert the time difference between two edges of two signals into a sequence of digital numbers. In this paper, a new time mode SerDes...
Dynamic Index coding as a generalization of the traditional index coding problem, deals with transmission of some dynamic data flows in the presence of side information. For a dynamic index coding system, the set of average flow rates for which the system can be stable is named Code-Constraint Capacity region. In this paper, we identify the code-constraint capacity region for a dynamic index coding...
In this paper, we propose a new rateless code based on overlapped generations. This proposed scheme works very well especially in a broadcast scenario, where channels with different characteristics are involved in the system. In the proposed scheme, we allow the adjacent generations to overlap. Our main focus is on the design of rateless codes to make any receiver able to recover all the source file...
Modern Data Centers (DCs) host hundreds of thousands of servers running diverse applications and services. The variety of these applications mandates distinct requirements such as latency and throughput. The state-of-the-art TCP protocol fails to meet these requirements, rendering the design of efficient DC transport protocols an urgent need. Since UDP is the most popular protocol besides TCP, it...
In this paper, we consider the problem of minimizing the maximum broadcast decoding delay experienced by all the receivers of generalized instantly decodable network coding (IDNC). Unlike the sum decoding delay, the maximum decoding delay as a definition of delay for IDNC allows a more equitable distribution of the delays between the different receivers and thus a better Quality of Service (QoS)....
Unlike traditional file transfer where only total delay matters, streaming applications impose delay constraints on each packet and require them to be in order. To achieve fast in-order packet decoding, we have to compromise on the throughput. We study this trade-off between throughput and in-order decoding delay, and in particular how it is affected by the frequency of block-wise feedback, whereby...
In the existing scheduled radio standards using Orthogonal Frequency Division Multiplexing (OFDM) or Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) modulation, the Cyclic Prefix (CP) duration is usually hard-coded and set as a compromise between the expected channel characteristics and the necessity of fitting a predefined frame duration. This may lead to system inefficiencies as well as bad...
A reverse direction transmission and block acknowledgement are the main features to improve the performance of MAC layer based on next generation wireless LANs. When the data send it in reverse direction from side A to B, side B does not need to send separate ACK, it may wait for a period of time is less than the sender's time of period to avoid the retransmission at sender and send a piggyback frame...
We investigate the problem of finding minimum-distortion policies for streaming delay-sensitive but distortion-tolerant data. We consider cross-layer approaches which exploit the coupling between presentation and transport layers. We make the natural assumption that the distortion function is convex and decreasing. We focus on a single source-destination pair and analytically find the optimum transmission...
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