Αναζήτηση
Αποτελέσματα 21-30 από 38
Online assessment of sensing performance in experimental spectrum sensing platforms
(2014)
Dynamic Spectrum Access aims at exploiting underutilized frequency bands towards improving wireless network performance. In this context, spectrum sensing is employed, in order to monitor spectrum occupancy and drive ...
Distributed back-pressure power control for wireless multi-hop networks
(2012)
A key problem in wireless networking is how to choose a link activation schedule and associated powers in concert with routing decisions to optimize throughput. Back-pressure control policies are optimal in this context, ...
The mutual benefits of primary-secondary user cooperation in wireless cognitive networks
(2014)
In cognitive radio networks, secondary users (SUs) may cooperate with the primary user (PU) in order to obtain more transmission opportunities and thus maximize their throughput. The synergy consists in the following: the ...
Dynamic resource provisioning for energy efficiency in wireless access networks: A survey and an outlook
(2014)
Traditionally, energy efficiency aspects have been included in the wireless access network design space only in the context of power control aimed at interference mitigation and for the increase of the terminal battery ...
Carrier assignment algorithms for OFDM-based multi-carrier wireless networks with channel adaptation
(2008)
We study carrier assignment in a single-cell multiuser OFDM multi-carrier system so as to satisfy user rate requirements with minimal resources. Different users experience different quality in different carriers due to ...
Enabling mobile sensing through a DTN framework
(2013)
Participatory Sensing is the concept of distributed data collection by self-selected participants. By exploiting latest technology's smart devices, a large number of valuable information can be collected through embedded ...
Video-aware relay selection in single-carrier and OFDM wireless systems
(2014)
In this paper we consider packetized video transmission in cooperative relay-based wireless networks. We propose algorithms for optimized relay selection that take into account the content of each specific video packet. ...
A framework and experimental study for discrimination of collision and channel errors in wireless LANs
(2012)
A fundamental unresolved problem in wireless networks is that of distinguishing packet errors that are caused by deteriorated link conditions and noise, from errors that occur due to packet collisions. In this paper, we ...
Optimal selfishness-aware device-assisted content delivery in cellular networks
(2014)
Utilization of device-to-device communication links provides an alternative way for mitigating the skyrocketing mobile data growth that challenges cellular operators nowadays. Namely, the owners of these devices can serve ...
Downlink transmission optimization and statistical feedback strategies in a multi-user IEEE 802.16m system
(2009)
A multi-user MIMO/OFDMA system for the next generation Broadband Wireless Access (BWA) networks is studied, in which the Base Station (BS) has only knowledge of the statistics of the channel. A combination of MIMO, OFDMA ...