NDLI: Resource Allocation and Rate Gains in Practical Full-Duplex Systems

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Resource Allocation and Rate Gains in Practical Full-Duplex Systems

Content Provider	ACM Digital Library
Author	Zhong, Yuan Krishnaswamy, Harish Zhou, Jin Marasevic, Jelena Zussman, Gil
Abstract	Full-duplex communication has the potential to substantially increase the throughput in wireless networks. However, the benefits of full-duplex are still not well understood. In this paper, we characterize the full-duplex rate gains in both single-channel and multi-channel use cases. For the single-channel case, we quantify the rate gain as a function of the remaining self-interference and SNR values. We also provide a sufficient condition under which the sum of uplink and downlink rates on a full-duplex channel is concave in the transmission power levels. Building on these results, we consider the multi-channel case. For that case, we introduce a new realistic model of a small form-factor (e.g., smartphone) full-duplex receiver and demonstrate its accuracy via measurements. We study the problem of jointly allocating power levels to different channels and selecting the frequency of maximum self-interference suppression, where the objective is maximizing the sum of the rates over uplink and downlink OFDM channels. We develop a polynomial time algorithm which is nearly optimal under very mild restrictions. To reduce the running time, we develop an efficient nearly-optimal algorithm under the high SINR approximation. Finally, we demonstrate via numerical evaluations the capacity gains in the different use cases and obtain insights into the impact of the remaining self-interference and wireless channel states on the performance.
Starting Page	109
Ending Page	122
Page Count	14
File Format	PDF
ISBN	9781450334860
DOI	10.1145/2745844.2745872
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2015-06-15
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Full-duplex Resource allocation Modeling
Content Type	Text
Resource Type	Article

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