Paper Info
Title
Portal: transparent cross-technology opportunistic forwarding for low-power wireless networks
Abstract
ABSTRACTOpportunistic forwarding seizes early forwarding opportunities in duty-cycled networks to reduce delay and energy consumption. But increasingly serious Cross-Technology Interference (CTI) significantly counteracts the benefits of opportunistic forwarding. Existing solutions try to reserve the channel for low-power networks by implicit avoidance or explicit coordination but ignore the potential of high-power CTI's superior capability. In this paper, we propose a new paradigm for low-power opportunistic forwarding in CTI environments. Instead of keeping high-power CTI devices silent, we directly involve them into the forwarding, as cross-technology forwarders. We design Portal to solve the challenges of realizing cross-technology opportunistic forwarding. To be transparent to the low-power networks, Portal adopts cross-technology rebroadcasting to enable the fast overhearing and forwarding of cross-technology data. To maximize the performance gain of using heterogeneous forwarders while minimizing the influence on legacy high-power traffic, we propose a post-forwarding forwarder selection and a traffic scheduling method. We also propose a feature-based ACK recognition method and a jamming-based ACK replying mechanism to forward the unreliable ACKs from asymmetric regions. Extensive experiments demonstrate that Portal not only avoids the CTI but also breaks through the existing performance limit.
Year
DOI
Venue
2020
10.1145/3397166.3409134
MOBIHOC
DocType
Citations 
PageRank 
Conference
1
0.35
References 
Authors
0
6
Name
Order
Citations
PageRank
Xiaolong Zheng115023.15
Dan Xia210.35
Xiuzhen Guo3104.22
Liang Liu458757.54
Yuan He5101281.82
Huadong Ma62020179.93