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Communications and Networks, Journal of

Issue 2 • Date April 2012

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  • Optimal packet scheduling for energy harvesting sources on time varying wireless channels

    Publication Year: 2012 , Page(s): 121 - 129
    Cited by:  Papers (10)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1003 KB) |  | HTML iconHTML  

    In this paper, we consider a source node that operates over a time varying channel with energy harvesting capability. The goal of the source is to maximize the average number of successfully delivered packets per time slot. The source is able to choose whether to transmit a packet or defer the transmission in each time slot. The decision which is chosen by the source depends on the channel informa... View full abstract»

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  • A general framework for the optimization of energy harvesting communication systems with battery imperfections

    Publication Year: 2012 , Page(s): 130 - 139
    Cited by:  Papers (51)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1132 KB) |  | HTML iconHTML  

    Energy harvesting has emerged as a powerful technology for complementing current battery-powered communication systems in order to extend their lifetime. In this paper a general framework is introduced for the optimization of communication systems in which the transmitter is able to harvest energy from its environment. Assuming that the energy arrival process is known non-causally at the transmitt... View full abstract»

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  • Optimal packet scheduling in a multiple access channel with energy harvesting transmitters

    Publication Year: 2012 , Page(s): 140 - 150
    Cited by:  Papers (51)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1031 KB) |  | HTML iconHTML  

    In this paper, we investigate the optimal packet scheduling problem in a two-user multiple access communication system, where the transmitters are able to harvest energy from the nature. Under a deterministic system setting, we assume that the energy harvesting times and harvested energy amounts are known before the transmission starts. For the packet arrivals, we assume that packets have already ... View full abstract»

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  • Sum-rate optimal power policies for energy harvesting transmitters in an interference channel

    Publication Year: 2012 , Page(s): 151 - 161
    Cited by:  Papers (49)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1011 KB) |  | HTML iconHTML  

    This paper considers a two-user Gaussian interference channel with energy harvesting transmitters. Different than conventional battery powered wireless nodes, energy harvesting transmitters have to adapt transmission to availability of energy at a particular instant. In this setting, the optimal power allocation problem to maximize the sum throughput with a given deadline is formulated. The conver... View full abstract»

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  • Optimal utilization of a cognitive shared channel with a rechargeable primary source node

    Publication Year: 2012 , Page(s): 162 - 168
    Cited by:  Papers (16)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (956 KB) |  | HTML iconHTML  

    This paper considers the scenario in which a set of nodes share a common channel. Some nodes have a rechargeable battery and the others are plugged to a reliable power supply and, thus, have no energy limitations. We consider two source-destination pairs and apply the concept of cognitive radio communication in sharing the common channel. Specifically, we give high-priority to the energy-constrain... View full abstract»

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  • Using range extension cooperative transmission in energy harvesting wireless sensor networks

    Publication Year: 2012 , Page(s): 169 - 178
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1285 KB) |  | HTML iconHTML  

    In this paper, we study the advantages of using range extension cooperative transmission (CT) in multi-hop energy harvesting wireless sensor networks (EH-WSNs) from the network layer perspective. EH-WSNs rely on harvested energy, and therefore, if a required service is energy-intensive, the network may not be able to support the service successfully. We show that CT networks that utilize both rang... View full abstract»

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  • Dynamically alternating power saving scheme for IEEE 802.16e mobile broadband wireless access systems

    Publication Year: 2012 , Page(s): 179 - 187
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1470 KB) |  | HTML iconHTML  

    Power saving is one of the most important features that extends the lifetime of portable devices in mobile wireless networks. The IEEE 802.16e mobile broadband wireless access system adopts a power saving mechanism with a binary truncated exponent algorithm for determining sleep intervals. When using this standard power saving scheme, there is often a delay before data packets are received at the ... View full abstract»

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  • Energy efficient sequential sensing in multi-user cognitive ad hoc networks: A consideration of an ADC device

    Publication Year: 2012 , Page(s): 188 - 194
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1438 KB) |  | HTML iconHTML  

    Cognitive networks (CNs) are capable of enabling dynamic spectrum allocation, and thus constitute a promising technology for future wireless communication. Whereas, the implementation of CN will lead to the requirement of an increased energy-arrival rate, which is a significant parameter in energy harvesting design of a cognitive user (CU) device. A well-designed spectrum-sensing scheme will lower... View full abstract»

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  • An efficient sliding window algorithm using adaptive-length guard window for turbo decoders

    Publication Year: 2012 , Page(s): 195 - 198
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1018 KB) |  | HTML iconHTML  

    An efficient sliding window algorithm employing an adaptive-length guard window for turbo decoders is proposed. The proposed algorithm results in significant complexity reductions, especially for small sliding window lengths where the additional computational complexity required for the guard window is critical. View full abstract»

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  • Progressive linear precoder design for multiple codewords MIMO ARQ systems with ARQ bundling feedback

    Publication Year: 2012 , Page(s): 199 - 205
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1236 KB) |  | HTML iconHTML  

    This work investigates the progressive linear precoder design for packet retransmissions in multi-input multi-output (MIMO) systems with multiple codewords and automatic repeat request (ARQ) bundling feedback. Assuming perfect channel state information, a novel progressive linear ARQ precoder is proposed in the perspective of minimizing the packet error rate. We devise the ARQ precoder by combinin... View full abstract»

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  • Noncoherent unitary space-time modulated DSSS systems in multipath channels

    Publication Year: 2012 , Page(s): 206 - 212
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (915 KB) |  | HTML iconHTML  

    In this paper, in order to effectively apply unitary space-time modulation to the direct-sequence spread-spectrum multiple-access (DSSS-MA) networks, we propose a low-rate, noncoherent, unitary, and space-time modulated DSSS system supporting any number of transmit antennas based on Walsh matrices. The proposed scheme simultaneously performs bandwidth spreading and space-time coding and outperform... View full abstract»

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  • Cycles in conditional faulty enhanced hypercube networks

    Publication Year: 2012 , Page(s): 213 - 221
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1189 KB) |  | HTML iconHTML  

    The architecture of an interconnection network is usually represented by a graph, and a graph G is bipancyclic if it contains a cycle for every even length from 4 to |V(G)|. In this article, we analyze the conditional edge-fault-tolerant properties of an enhanced hypercube, which is an attractive variant of a hypercube that can be obtained by adding some complementary edges. For any n-dimensional ... View full abstract»

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  • Table of Contents [Front cover]

    Publication Year: 2012 , Page(s): c1
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    Publication Year: 2012 , Page(s): c4
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  • Special issue on energy harvesting in wireless networks

    Publication Year: 2012 , Page(s): 115 - 120
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    Publication Year: 2012 , Page(s): c2
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Aims & Scope

The Journal of Communications and Networks is published six times per year, and is committed to publishing high-quality papers that advance the state-of-the-art and practical applications of communications and information networks.

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Meet Our Editors

Editor-in-Chief
H. Vincent Poor
Princeton University