NDLI: Supporting real-time wireless traffic through a high-throughput side channel

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Supporting real-time wireless traffic through a high-throughput side channel

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Supporting real-time wireless traffic through a high-throughput side channel

Content Provider	ACM Digital Library
Author	Lu, Haoyang Gao, Wei
Abstract	Performance of modern cognitive and interactive mobile applications highly depends on the data transmission delay in the wireless link that is vital to supporting real-time wireless traffic. To eliminate wireless network congestion caused by large amounts of concurrent network traffic and support such real-time traffic, traditional schemes adopt various flow control and QoS-aware traffic scheduling techniques, but fail when the amount of network traffic further increases. In this paper, we present a novel design of high-throughput wireless side channel, which operates concurrently with the existing wireless network channel over the same spectrum but dedicates to real-time traffic. Our key idea of realizing such a side channel is to exploit the excessive SNR margin in the wireless network to encode data as patterned interference. We design such patterned interference in form of energy erasure over specific subcarriers in an OFDM-based wireless network, and achieve a data rate of 1.25 Mbps in the side channel without affecting the existing wireless network links. Experimental results over software-defined radio platforms demonstrate the effectiveness of our side channel design in reducing the latency of real-time wireless traffic, while providing sufficient data throughput for such traffic.
Starting Page	311
Ending Page	320
Page Count	10
File Format	PDF
ISBN	9781450341844
DOI	10.1145/2942358.2942386
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-07-05
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Wireless side channel Wireless networks Real-time wireless traffic
Content Type	Text
Resource Type	Article

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