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The booming of mobile communications has brought operators to face the issue to improve network capacity utilization to provide high quality of experience to end users. One way to exploit efficiently the available network capacity is mobile data offloading, which allows network operators to reduce congestion by offloading some traffic to other operators' networks, possibly based on different technologies,...
Dynamic base station downlink discontinuous transmission (DTX) operations have been proposed and under discussion in the standardization body as a candidate to reduce interference in the LTE network to support rapidly increasing demand for mobile broadband services and traffic volumes [1]. In this paper, we analyze the energy efficiency improvement of the dynamic base station DTX operations from three...
This paper presents an analysis of energy-capacity trends of the broadband communications services in Sub Saharan Africa sampling Sudan case. The analysis utilizes the joule/bit metric to visualize the distribution of the broadband services availability across the country, hence the region. Consequently this provides an explanation for how the energy-capacity relationship can impact the Digital Divide...
Energy efficiency aspects in cellular networks can significantly contribute to the reduction of greenhouse gas emissions and help to save the environment. The base station (BS) sleeping strategy has become a well-known technique to achieve energy savings by switching off redundant BSs mainly for lightly loaded networks. Besides, introducing renewable energies as alternative power sources becomes a...
Performance enhancements of cellular networks for passengers in high speed railway systems are investigated. Relays placed on top of each train car are proposed. These relays communicate with the cellular base station (BS) over Long Term Evolution (LTE) long range links and with the mobile terminals (MTs) inside the train cars using IEEE 802.11a short range links. Scenarios with unicasting and multicasting...
In this paper, we focus on practical issues when implementing sleep mode in base stations. Our aim being to reduce energy consumption without affecting the Quality of Service (QoS) perceived by users, we expose some problems that my occur when applying sleep mode and propose practical solutions to cope with the resulting QoS degradation. We namely consider activation time issue that may result in...
Energy consumption is an issue in general in information and communication technologies (ICT), but also cellular communications in particular. Therefore there is a need for assessing the hardware implementation methods used for cellular from energy consumption perspective. OFDM is a bandwidth efficient multiple access method. It is being used by all forms of future wireless mobilela communication...
The mobile Internet has finally arrived with the sky-rocketing usage increase of HSPA. LTE, WiMAX and evolved WiFi are the upcoming wireless standards which are based on OFDM and MIMO. The mentioned standards have already started the evolution process with LTE-advanced, IEEE 802.16m and IEEE 802.11n. New technology building blocks are on its way like cooperative MIMO, relaying and self-organizing...
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