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Interference mitigation in multi-hop wireless networks with advanced physical layer techniques

Interference mitigation in multi-hop wireless networks with advanced physical layer techniques

Yantian Hou
Boise State University
12:00pm – 1:00pm, 8th Dec, 2017
CCP 221

Abstract: With the ever-growing number of wireless systems, the problem of spectrum scarcity is becoming more important than ever. The overlapping of disparate networks in the same spectrum band inevitably leads to cross-technology interference (CTI). Some examples of existing and future radio devices/networks that create CTI include: IEEE 802.11 (WiFi), 802.15.4 (ZigBee), 802.16 (WiMax), and Bluetooth in the ISM bands, IEEE 802.22 (WRAN) and IEEE 802.11af (WLAN) in the TV white space, and the cordless phone, microwave, baby monitor, etc. The CTI can be detrimental to the performance of co-locating networks if it is not properly mitigated. There are only few works dealing with such external CTI in multi-hop networks. In addition to the external interference from all the coexisting devices, the internal interference generated within the multi-hop network also needs to be addressed. There have been several works studying the problem of improving multi-hop network throughput through avoiding internal interference. In our work, we try to extend the feasible throughput region of coexisting multi-hop wireless networks by utilizing advanced physical-layer techniques, such as wireless MIMO and reconfigurable antennas (RA). The advance of such new physical-layer techniques provides new optimization freedoms and hasn’t been well exploited by previous works.

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