TY - GEN
T1 - Efficient and reliable low-power backscatter networks
AU - Wang, Jue
AU - Hassanieh, Haitham
AU - Katabi, Dina
AU - Indyk, Piotr
PY - 2012/12/1
Y1 - 2012/12/1
N2 - There is a long-standing vision of embedding backscatter nodes like RFIDs into everyday objects to build ultra- low power ubiquitous networks. A major problem that has challenged this vision is that backscatter communication is neither reliable nor efficient. Backscatter nodes cannot sense each other, and hence tend to suffer from colliding transmissions. Further, they are ineffective at adapting the bit rate to channel conditions, and thus miss opportunities to increase throughput, or transmit above capacity causing errors. This paper introduces a new approach to backscatter communication. The key idea is to treat all nodes as if they were a single virtual sender. One can then view collisions as a code across the bits transmitted by the nodes. By ensuring only a few nodes collide at any time, we make collisions act as a sihir.se code and decode them using a new customized compressive sensing algorithm. Further, we can make these collisions act as a ruleless code to automatically adapt the bit rate to channel quality i.e., nodes can keep colliding until the base station has collected enough collisions to decode. Results from a network of backscatter nodes communicating with a USRP backscatter base station demonstrate that the new design produces a 3.5 x throughput gain, and due to its rateless code, reduces message loss rate in challenging scenarios from 50% to zero.
AB - There is a long-standing vision of embedding backscatter nodes like RFIDs into everyday objects to build ultra- low power ubiquitous networks. A major problem that has challenged this vision is that backscatter communication is neither reliable nor efficient. Backscatter nodes cannot sense each other, and hence tend to suffer from colliding transmissions. Further, they are ineffective at adapting the bit rate to channel conditions, and thus miss opportunities to increase throughput, or transmit above capacity causing errors. This paper introduces a new approach to backscatter communication. The key idea is to treat all nodes as if they were a single virtual sender. One can then view collisions as a code across the bits transmitted by the nodes. By ensuring only a few nodes collide at any time, we make collisions act as a sihir.se code and decode them using a new customized compressive sensing algorithm. Further, we can make these collisions act as a ruleless code to automatically adapt the bit rate to channel quality i.e., nodes can keep colliding until the base station has collected enough collisions to decode. Results from a network of backscatter nodes communicating with a USRP backscatter base station demonstrate that the new design produces a 3.5 x throughput gain, and due to its rateless code, reduces message loss rate in challenging scenarios from 50% to zero.
KW - Backscatter
KW - Compressive sensing
KW - RFID
KW - Wireless
UR - http://www.scopus.com/inward/record.url?scp=84894577800&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84894577800&partnerID=8YFLogxK
U2 - 10.1145/2377677.2377685
DO - 10.1145/2377677.2377685
M3 - Conference contribution
AN - SCOPUS:84894577800
SN - 9781450314190
T3 - Computer Communication Review
SP - 61
EP - 72
BT - Proceedings of the ACM SIGCOMM 2012 and Best Papers of the Co-located Workshops
T2 - Annual Conference of the ACM Special Interest Group on Data Communication on the Applications, Technologies, Architectures, and Protocols for Computer Communication, ACM SIGCOMM 2012
Y2 - 13 August 2012 through 17 August 2012
ER -