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In traditional automatic retransmission request (ARQ) based wireless broadcasting (WBC) systems, one lost packet is retransmitted per slot to guarantee the correct reception of each packet, which leads to low spectrum efficiency. In this paper, we propose an Ave-Max-Min Network Coding (NC) based WBC protocol. Specifically, to reduce the overall number of retransmissions, lost packets of different...
Virtualization is a promising technique to solve the ossification of current wireless networks and meet the ever-increasing mobile data volume. This paper analyses the requirements in wireless network virtualization and proposes a generalized virtualization framework to overcome these challenges. A novel VMAC (virtual medium access control) concept is devised to perform resource virtualization and...
In cognitive radio (CR) networks, cross-layer design is an important issue since the behavior of one protocol could affect the performance of others. However, for the energy-constraint CR networks, the previous works mostly focus on maximizing the throughput in physical or transport layer, rather than the energy efficiency of the end-to-end transmission control protocol (TCP). In this paper, we propose...
Maximizing system sum-rate or minimizing error rate with constrained power are the main research focuses in the previous system-oriented power allocation schemes. However, link-oriented power allocation schemes that minimize power consumption with constrained rates for every link, attracted researchers in recent energy efficiency system design. In this paper, a link-oriented optimal power allocation...
This paper presents a layered service discovery (LSD) protocol in Mobile Ad hoc Networks (MANETs). Service discovery is the key challenge for the pervasive personal environment for the lack of limited resources and high mobility. While a couple of existing service discovery protocols have been developed for the infrastructure-based wireless environment without considering the volatile characteristic...
Data gathering in a wireless sensor network works in a way that a sink collects data from a large number of sensor nodes. Traditionally, the hop-by-hop transmission is used in this many-to-one communication. In this communication pattern, the closer a sensor node is to the sink, the sooner its energy is exhausted. The nodes close to the sink need to route data packets for farther nodes and thus the...
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