Coopetition Based Inter-Operator Traffic Sharing for Energy Efficient Cellular Networks

Energy-efficient and reliable data transmission is a challenging task in wireless relay networks (WRNs). Energy efficiency in cellular networks has received significant attention because of the present need for reduced energy consumption, thereby maintaining the profitability of networks, which in turn makes these networks “greener”. The urban cell topography needs more energy to cover the total area of the cell. The base station does not cover the entire area in a given topography and adding more number of base stations is a cost prohibitive one. Energy-efficient relay placement model which calculates the maximum cell coverage is proposed in this work that covers all sectors and also an energy-efficient incremental redundancy-hybrid automatic repeat request (IR-HARQ) power allocation scheme to improve the reliability of the network by improving the overall network throughput is proposed. An IR-HARQ power allocation method maximizes the average incremental mutual information at each round, and its throughput quickly converges to the ergodic channel capacity as the number of retransmissions increases. Simulation results show that the proposed IR-HARQ power allocation achieves full channel capacity with average transmission delay and maintains good throughput under less power consumption. Also the impact of relaying performance on node distances between relay station and base station as well as between user and relay station and relay height for line of sight conditions are analyzed using full decode and forward (FDF) and partial decode and forward (PDF) relaying schemes. Compared to FDF scheme, PDF scheme provides better performance and allows more freedom in the relay placement for an increase in cell coverage.

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Joint relay assignment and adaptive modulation for energy-efficient cellular networks

2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC) ◽

10.1109/pimrc.2014.7136390 ◽

2014 ◽

Author(s):

Islam Samy ◽

Ahmed H. Zahran ◽

Tamer ElBatt

Keyword(s):

Cellular Networks ◽

Energy Efficient ◽

Adaptive Modulation ◽

Relay Assignment

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A Real-Time Campus Guidance System Based on Energy Efficient Location Determination Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.211-212.485 ◽

2011 ◽

Vol 211-212 ◽

pp. 485-489

Author(s):

Chun Hao Lin ◽

Yen Szu Liu ◽

Chi Hua Chen ◽

Bon Yeh Lin ◽

Chi Chun Lo

Keyword(s):

Cellular Networks ◽

Energy Efficient ◽

Smart Phone ◽

Personal Digital Assistant ◽

Location Estimation ◽

Guidance System ◽

Gps Receiver ◽

Determination Method ◽

Location Based Service ◽

Location Determination

Recently guidancesystem is becoming more popular, as more people realize its benefits. There have been many developments on campus guidance system (CGS) in personal digital assistant (PDA) and smart phone. The building and promotion of the energy efficient location determination method is an important part of CGS. The cellular-based location determination using RSS from cellular network is more immediately, power-effective, and easy to deploy and maintain than traditional methods. In this paper, we design the CGS which provides the fingerprint position algorithm (FPA) using RSS from cellular networks and location-based service (LBS) for user reference. In experiments, we compare the estimated positioning information with the real information from global position system (GPS) receiver. The results show that the error of location estimation using FPA is about 9.92 meters. This approach is feasible to be applied to CGS.

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