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The 3GPP Long Term Evolution (LTE) is considered as a dominant future cellular wireless technology in terms of performance and user experience. With technological advancement of wireless networks, dependencies and business impact of mobile network services have also been increased phenomenally. It is, therefore, crucial to address issues regarding network infrastructure or service failure. In this...
Next generation wireless networks are supposed to provide best quality services, minimum delays which results in reduce total access cost, increased coverage and more reliable wireless access to the users at anytime and anywhere. One of the most challenging problems facing deployment of 4G technology is to support quality of service (QoS). In this paper, architecture (4UATT) is proposed along with...
Energy saving is one of the important tasks in wireless communication due to the limited battery attached to the mobile devices. This paper has two parts. In the first part, we give a localized algorithm for constructing the Voronoi diagram with the given set of nodes in wireless networks. In the later part, an energy efficient network architecture for wireless networks using Voronoi diagram is described...
As heterogeneous wireless networks are deployed and users need more flexible mobility services, there has been a lot of research work about interworking mechanism between widely deployed 3G network and rapidly boarded WLAN. On the other side, WiBro is newly commercialized in Korea as the next generation wireless network. WiBro is based on IEEE 802.16e and it is expected to provide enough mobility...
We consider the problem of several users transmitting packets to a base station, and study an optimal scheduling formulation involving three communication layers, namely, the medium access control, link, and physical layers. We assume Markov models for the packet arrival processes and the channel gain processes. Perfect channel state information is assumed to be available at the transmitter and the...
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