Implementation and Evaluation of Bi-Directional WiFi Back-channel Communication

被引：0
|
作者：
Dai, Yue [1 ]
Peng, Wenhao [1 ]
Wang, Yu [1 ]
Chuo, Li-Xuan [1 ]
Suri, Karan [1 ]
Zheng, Hao [1 ]
Wentzloff, David [1 ]
Kim, Hun-Seok [1 ]
机构：
[1] Univ Michigan, Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
来源：
2018 IEEE 29TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) | 2018年
关键词：
back-channel; ultra-low power communication; OFDM; WiFi;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents implementation and validation of innovative back-channel wireless communication techniques for ultra-low power (ULP) devices. Back-channel schemes allow ULP devices that are not WiFi-compliant to communicate with already deployed WiFi infrastructure without any hardware modification. This paper introduces an improved payload bit crafting procedure to create back-channel messages embedded in standard WiFi OFDM packets. In addition, the concept of bi-directional WiFi back-channel is newly introduced and validated in the prototype system. Using a commercial WiFi chip and Universal Software Radio Peripheral (USRP) X310 hardware platform, two downlink back-channel schemes as well as an uplink back-channel scheme are successfully demonstrated rendering realistic real-time communication performance. Field trials are performed for over-the-air wireless back-channel bi-directional communications. System characterization confirms that the proposed back-channel can operate at lower signal-to-noise ratio than what standard WiFi systems require.
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页数：7
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