Priva-Stream: Private Collaborative Streaming
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(2) P RIVA -S TREAM: Private Collaborative Streaming Simon Da Silva Univ. Bordeaux, LaBRI, France P RIVA -S TREAM idea. Video content consumption. I Reliability, QoE and scalability MS-Stream: Multiple-Source adaptive streaming over HTTP I Incentive to contribute Rewarding: contributing users get a higher quality I End-users privacy TEE (SGX): encryption, NAT and anonymity P RIVA -S TREAM overview Content Delivery Networks (CDN). Priva-Stream Content servers. Priva-Stream Clients. HTTP Adaptive Streaming (HAS). ?. Content Delivery. ?. ?. ?. P RIVA -S TREAM technical description. MS-Stream: Multi-Source Streaming over HTTP Up to a 4 Mbps quality. 1 Mb. Su. 1. Sub-segment composition st e u q e r t n e m g e s b. s p b 1M. ps. 3. 2 Mbps. 2. Sub-segment delivery. 4. Sub-segment aggregation. 5. Adaptation Example of possible sub-segments. Content qualities available at MS-Stream server. Sub-segment 1 Sub-segment 2 Sub-segment 3. Sub-segment composer at MS-Stream server. GOP GOP #1 #1GOP GOP GOP GOP GOP GOP GOP GOP GOP GOP Time. .... GOP High bitrate GOP. GOP GOP GOP GOP. GOP GOP. Time. Redundant GOP bitrate GOP. GOPGOP. GOP GOP GOP GOP. GOP #1 GOP. GOP GOP GOP GOP. GOP Null bitrate GOP. P RIVA -S TREAM early results. Problem statement. Experiment: Four clients joining the system sequentially. Reduced scalability cost. High reliability P2P + CDN. Dynamic resource allocation. Startup delay (s). 1.00. CDN. 0.75. 0.50. 0.25. 0.00 client1. P2P. client2. client3. client4. client3. client4. MS−Stream. P2P + HAS. CDN + HAS. HAS QoE fairness among users. Startup delay (s). 1.00. 0.75. 0.50. 0.25. 0.00 client1. client2. Priva−Stream. High QoE. https://simondasilva.fr. Startup delay per client (s) - MS-Stream (top) vs P RIVA -S TREAM (bottom) MW’18 - December 2018. [email protected].
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