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Balancing Multimedia Delivery: TCP, UDP, and SRP Performance Insights

This paper explores multimedia communication characteristics across different protocols, focusing on TCP's guaranteed delivery and flow control versus UDP's best-effort delivery model. It highlights the Selective Retransmission Protocol (SRP) that combines advantages of both TCP and UDP, allowing for effective retransmission of lost packets while maintaining low latency. We present testing approaches and results, showcasing low loss and latency scenarios with an SRP implementation that optimizes quality. The potential for future work includes enhanced flow control, loss detection, and additional algorithm development.

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Balancing Multimedia Delivery: TCP, UDP, and SRP Performance Insights

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Presentation Transcript

  1. SRPA Multimedia Protocol Ken French George Oprica Mike Piecuch Advisor: Mark Claypool

  2. Multimedia Characteristics Loss Latency

  3. Multimedia Over TCP Guaranteed delivery (No loss) Flow Control Unbounded delay

  4. Multimedia Over UDP Best effort delivery (minimal latency) Unbounded loss

  5. Multimedia Over SRP Selective Retransmission Protocol Combination of TCP & UDP Retransmits a percentage of lost packets Application layer client/server protocol

  6. SRP Implementation Algorithms Equal Loss Latency (ELL) Optimum Quality (OQ)

  7. Testing Approach UDP blaster Token bucket router

  8. Sample Data

  9. Low Loss, Low Latency

  10. High Loss, High Latency

  11. Conclusions SRP is a good balance Great potential Additional tuning

  12. Future Work Flow control Loss detection Additional algorithms

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