Resource Efficiency: A New Paradigm on Energy Efficiency and Spectral Efficiency Tradeoff

Spectral efficiency (SE) and energy efficiency (EE) are the main metrics for designing wireless networks. Rather than focusing on either SE or EE separately, recent works have focused on the relationship between EE and SE and provided good insight into the joint EE-SE tradeoff. However, such works h...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 13; no. 8; pp. 4656 - 4669
Main Authors: Tang, Jie, So, Daniel K. C., Alsusa, Emad, Hamdi, Khairi Ashour
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.08.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Allocations
Applied sciences
Bandwidth
Downlink
Efficiency
Energy management
Equipments and installations
Exact sciences and technology
Frequency division multiple access
Information, signal and communications theory
Mathematical models
Measurement
Mobile radiocommunication systems
Multiplexing
Operation, maintenance, reliability
Optimization
Quality of service
Radiocommunications
Resource allocation
Resource management
Signal and communications theory
Spectra
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Wireless communication
Wireless networks
energy efficiency (EE)
orthogonal frequency division multiple access (OFDMA)
Green radio (GR)
resource efficiency (RE)
spectral efficiency (SE)
Performance evaluation
Wireless telecommunication
Resource allocation
Frequency division multiple access
Cell network
Power allocation
Optimization
Energetic efficiency
Algorithm complexity
Electric power consumption
Optimal planning
Gradient method
Mobile radiocommunication
Energy spectrum
Upper bound
Telecommunication network
Orthogonal frequency division multiplexing
Wireless network
Numerical simulation
Metric
Resource management
Service quality
ISSN:1536-1276, 1558-2248
Online Access:Get full text
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Summary:Spectral efficiency (SE) and energy efficiency (EE) are the main metrics for designing wireless networks. Rather than focusing on either SE or EE separately, recent works have focused on the relationship between EE and SE and provided good insight into the joint EE-SE tradeoff. However, such works have assumed that the bandwidth was fully occupied regardless of the transmission requirements and therefore are only valid for this type of scenario. In this paper, we propose a new paradigm for EE-SE tradeoff, namely the resource efficiency (RE) for orthogonal frequency division multiple access (OFDMA) cellular network in which we take into consideration different transmission-bandwidth requirements. We analyse the properties of the proposed RE and prove that it is capable of exploiting the tradeoff between EE and SE by balancing consumption power and occupied bandwidth; hence simultaneously optimizing both EE and SE. We then formulate the generalized RE optimization problem with guaranteed quality of service (QoS) and provide a gradient based optimal power adaptation scheme to solve it. We also provide an upper bound near optimal method to jointly solve the optimization problem. Furthermore, a low-complexity suboptimal algorithm based on a uniform power allocation scheme is proposed to reduce the complexity. Numerical results confirm the analytical findings and demonstrate the effectiveness of the proposed resource allocation schemes for efficient resource usage.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2014.2316791