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Multipath TCP in SDN-enabled LEO Satellite Networks

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Presentation on theme: "Multipath TCP in SDN-enabled LEO Satellite Networks"— Presentation transcript:

1 Multipath TCP in SDN-enabled LEO Satellite Networks
Pengyuan Du, Sobhan Nazari, Jorge Mena, Ruolin Fan, Mario Gerla, Riten Gupta Department of Computer Science, UCLA, USA

2 Outline Introduction Satellite SDN Architecture MPTCP-SDN Framework
Simulation Conclusion

3 Outline Introduction Satellite SDN Architecture MPTCP-SDN Framework
Simulation Conclusion

4 Introduction Low Earth Orbit (LEO) satellite networks Example
Global coverage High bandwidth Energy-efficient Broadcasting Backhaul Example Iridium Teledesic

5 TCP: large delay, low throughput
Introduction Challenge Frequent satellite handover Every 10 min Interrupt voice or video app Long RTT Hundreds of millisecond TCP: large delay, low throughput

6 Related Work High Bandwidth Delay Product TCP [1]
Hybla Cubic Westwood Multipath TCP (MPTCP) [2] Improve throughput Soft handover [3] [1] Caini, Carlo, Rosario Firrincieli, and Daniele Lacamera. "Comparative performance evaluation of tcp variants on satellite environments." ICC. IEEE, 2009. [2] Ford, Alan, et al. Architectural guidelines for multipath TCP development. No. RFC [3] Paasch, Christoph, et al. "Exploring mobile/WiFi handover with multipath TCP." CellNet. ACM, 2012.

7 Related Work MPTCP is an extension to TCP which lets you use multiple paths simultaneously Path manager, scheduler To manage a Multipath TCP connection that uses several paths TCP subflows To transport data Congestion control To control congestion over multiple paths

8 MPTCP socket Multipath TCP TCP1 TCP2 TCPn ... Application Application
Transport TCP1 TCP2 TCPn Network ... Datalink Physical

9 MPTCP Data transmission ABCDEF socket socket Multipath TCP
Two levels of sequence numbers ABCDEF socket socket Multipath TCP Multipath TCP Data sequence # TCP1 TCP1 TCP1 sequence # TCP2 TCP2 sequence # TCP2

10 MPTCP in Satellite Network
The idea in [1] The circled number 1-4 indicates the order of 4 handovers occurred to each sub-flow. [1] Du, Pengyuan, Xiao Li, You Lu, and Mario Gerla. "Multipath TCP over LEO satellite networks.“ IWCMC. IEEE, 2015.

11 MPTCP in Satellite Network
On-demand Multipath Source Routing (OMSR) Distributed protocol => control overhead Lacks of inter-satellite signaling => route conflict Devise a more sophisticated scheme => onboard processing The circled number 1-4 indicates the order of 4 handovers occurred to each sub-flow. [1] Du, Pengyuan, Xiao Li, You Lu, and Mario Gerla. "Multipath TCP over LEO satellite networks.“ IWCMC. IEEE, 2015.

12 Motivation Replace OMSR with Software-defined Networking (SDN) [1]
SDN splits the control and data plane Centralize the design logic Minimize onboard processing Easier computation of disjoint paths Contribution MPTCP+SDN framework for LEO system [1] Kreutz, Diego, et al. "Software-defined networking: A comprehensive survey." Proceedings of the IEEE 103.1 (2015):

13 Outline Introduction Satellite SDN Architecture MPTCP-SDN Framework
Simulation Conclusion

14 Satellite SDN Architecture
[1] Bao, Jinzhen, et al. "OpenSAN: a software-defined satellite network architecture." ACM SIGCOMM Computer Communication Review. ACM, 2014. [2] Saxena, Piyush. "Satellite Communication Advancement, Issues, Challenges and Applications." International Journal of Research 

15 Outline Introduction Related work & Motivation
Satellite SDN Architecture MPTCP-SDN Framework Simulation Conclusion

16 MPTCP-SDN Framework MPTCP configurations SDN controller
Each user has 2 separate interfaces Establish 2 TCP subflows using 1 interface Recently enabled since MPTCP v0.89 The other interface runs in backup mode SDN controller Topology-aware (LLDP) MPTCP-aware Multiple disjoint paths discovery

17 MPTCP-SDN Framework

18 MPTCP-SDN Framework

19 MPTCP-SDN Framework

20 Outline Introduction Related work & Motivation
Satellite SDN Architecture MPTCP-SDN Framework Simulation Conclusion

21 Simulation Simulation setup Linux Ubuntu 14.04 LEO network
Mininet emulator Up/Downlink: 2Mb/s Floodlight remote controller Inter-satellite link: 9Mb/s Link delay: 14ms Kernel MPTCP v0.90 Compare against: TCP Hybla Path manager: fullmesh, num_flows=2 MPTCP+Equal-cost multipath routing (ECMP)[2] Congestion control: balia [2] [1] Peng, Qiuyu, Anwar Walid, and Steven H. Low. "Multipath TCP algorithms: theory and design." ACM SIGMETRICS [2] Raiciu, Costin, et al. "Improving datacenter performance and robustness with multipath TCP." ACM SIGCOMM. ACM, 2011.

22 Simulation Results Throughput of MPTCP with SDN

23 Simulation Results

24 Outline Introduction Related work & Motivation
Satellite SDN Architecture MPTCP-SDN Framework Simulation Conclusion

25 Conclusion Proposed an MPTCP-SDN framework for LEO satellite network
MPTCP exploits and manages multiple TCP subflows An MPTCP-aware SDN controller The framework addresses handover by leveraging MPTCP backup mode. Simulation Outperforms single path TCP, MPTCP+ECMP Soft handover

26 Thanks! Q&A

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