TY - GEN
T1 - L2D2
T2 - 2021 Annual Conference of the ACM Special Interest Group on Data Communication on the Applications, SIGCOMM 2021
AU - Vasisht, Deepak
AU - Shenoy, Jayanth
AU - Chandra, Ranveer
N1 - Funding Information:
We thank anonymous reviewers and our shepherd, Barath Ragha-van, for their valuable feedback. We are grateful to Peder Olsen for the multiple brainstorming sessions about this research and to Anirudh Badam, Anuj Kalia, Haitham Hassanieh, Romit Roy Choudhury, Yu Tao, and Zikun Liu for providing feedback on early versions of this paper. Jayanth Shenoy is funded by the NSF Graduate Research Fellowship Program under Grant No. DGE–1746047.
Funding Information:
We thank anonymous reviewers and our shepherd, Barath Raghavan, for their valuable feedback. We are grateful to Peder Olsen for the multiple brainstorming sessions about this research and to Anirudh Badam, Anuj Kalia, Haitham Hassanieh, Romit Roy Choudhury, Yu Tao, and Zikun Liu for providing feedback on early versions of this paper. Jayanth Shenoy is funded by the NSF Graduate Research Fellowship Program under Grant No. DGE?1746047.
Publisher Copyright:
© 2021 ACM.
PY - 2021/8/9
Y1 - 2021/8/9
N2 - Large constellations of Low Earth Orbit satellites promise to provide near real-time high-resolution Earth imagery. Yet, getting this large amount of data back to Earth is challenging because of their low orbits and fast motion through space. Centralized architectures with few multi-million dollar ground stations incur large hour-level data download latency and are hard to scale. We propose a geographically distributed ground station design, L2D2, that uses low-cost commodity hardware to offer low latency robust downlink. L2D2 is the first system to use a hybrid ground station model, where only a subset of ground stations are uplink-capable. We design new algorithms for scheduling and rate adaptation that enable low latency and high robustness despite the limitations of the receive-only ground stations. We evaluate L2D2 through a combination of trace-driven simulations and real-world satellite-ground station measurements. Our results demonstrate that L2D2's geographically distributed design can reduce data downlink latency from 90 minutes to 21 minutes.
AB - Large constellations of Low Earth Orbit satellites promise to provide near real-time high-resolution Earth imagery. Yet, getting this large amount of data back to Earth is challenging because of their low orbits and fast motion through space. Centralized architectures with few multi-million dollar ground stations incur large hour-level data download latency and are hard to scale. We propose a geographically distributed ground station design, L2D2, that uses low-cost commodity hardware to offer low latency robust downlink. L2D2 is the first system to use a hybrid ground station model, where only a subset of ground stations are uplink-capable. We design new algorithms for scheduling and rate adaptation that enable low latency and high robustness despite the limitations of the receive-only ground stations. We evaluate L2D2 through a combination of trace-driven simulations and real-world satellite-ground station measurements. Our results demonstrate that L2D2's geographically distributed design can reduce data downlink latency from 90 minutes to 21 minutes.
KW - distributed ground station
KW - earth observation
KW - ground station architecture
KW - satellite networking
UR - http://www.scopus.com/inward/record.url?scp=85113200757&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85113200757&partnerID=8YFLogxK
U2 - 10.1145/3452296.3472932
DO - 10.1145/3452296.3472932
M3 - Conference contribution
AN - SCOPUS:85113200757
T3 - SIGCOMM 2021 - Proceedings of the ACM SIGCOMM 2021 Conference
SP - 151
EP - 164
BT - SIGCOMM 2021 - Proceedings of the ACM SIGCOMM 2021 Conference
PB - Association for Computing Machinery
Y2 - 23 August 2021 through 27 August 2021
ER -