Energy Efficient Wireless Relay Networks With Computational Awareness

In this paper, we investigate joint subcarrier (SC) allocation, pairing and power loading for optimized energy efficiency (EE) in multiuser, multicell, multicarrier downlink decode-and-forward (DF) relay interference networks with computational awareness, i.e., taking computations-related energy int...

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Published in:IEEE transactions on communications Vol. 68; no. 2; pp. 825 - 840
Main Authors: Bossy, Bartosz, Kryszkiewicz, Pawel, Bogucka, Hanna
Format: Journal Article
Language:English
Published: New York IEEE 01.02.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Computer simulation
Constraints
energy efficiency
Integer programming
Interference
Iterative algorithms
Iterative methods
Mathematical programming
OFDM
Optimization
Power consumption
Power demand
Power efficiency
relay interference networks
Relay networks
Relay networks (telecommunications)
Resource management
Signal processing
Subcarriers
ISSN:0090-6778, 1558-0857
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Abstract In this paper, we investigate joint subcarrier (SC) allocation, pairing and power loading for optimized energy efficiency (EE) in multiuser, multicell, multicarrier downlink decode-and-forward (DF) relay interference networks with computational awareness, i.e., taking computations-related energy into account. In order to maximize EE of the network, the transmission mode is adapted to instantaneous channel conditions. For the benefit of spectral-efficiency, both direct- and relayed transmission is allowed to use the same SCs simultaneously. Linearly rate-dependent power consumption of signal processing is considered. The formulated optimization problem is the nonconvex fractional mixed binary-integer programming problem, which has NP-hard complexity. Hence, we approximate the problem by the series of equivalent convex problems applying convex relaxation techniques such as a Successive Convex Approximation (SCA). Based on these transformations, we develop an iterative algorithm exploiting the Dinkelbach method to tackle the nonlinear fractional programming problem which maximizes EE of the system. Moreover, in our considerations, the total transmission power constraint and the minimum required rate constraints have been included. Simulation results demonstrate the effectiveness of our solution for future relay networks.
AbstractList In this paper, we investigate joint subcarrier (SC) allocation, pairing and power loading for optimized energy efficiency (EE) in multiuser, multicell, multicarrier downlink decode-and-forward (DF) relay interference networks with computational awareness, i.e., taking computations-related energy into account. In order to maximize EE of the network, the transmission mode is adapted to instantaneous channel conditions. For the benefit of spectral-efficiency, both direct- and relayed transmission is allowed to use the same SCs simultaneously. Linearly rate-dependent power consumption of signal processing is considered. The formulated optimization problem is the nonconvex fractional mixed binary-integer programming problem, which has NP-hard complexity. Hence, we approximate the problem by the series of equivalent convex problems applying convex relaxation techniques such as a Successive Convex Approximation (SCA). Based on these transformations, we develop an iterative algorithm exploiting the Dinkelbach method to tackle the nonlinear fractional programming problem which maximizes EE of the system. Moreover, in our considerations, the total transmission power constraint and the minimum required rate constraints have been included. Simulation results demonstrate the effectiveness of our solution for future relay networks.
Author Bossy, Bartosz
Kryszkiewicz, Pawel
Bogucka, Hanna
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SubjectTerms Computer simulation
Constraints
energy efficiency
Integer programming
Interference
Iterative algorithms
Iterative methods
Mathematical programming
OFDM
Optimization
Power consumption
Power demand
Power efficiency
relay interference networks
Relay networks
Relay networks (telecommunications)
Resource management
Signal processing
Subcarriers
Title Energy Efficient Wireless Relay Networks With Computational Awareness
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