Device-Based LTE Latency Reduction at the Application Layer
summary
LRP is a user‑space Android solution that cuts LTE uplink latency by up to 7.4x (median 42ms → 5ms) by eliminating two measured bottlenecks: DRX dose latency (~30ms) and scheduling latency (>12ms) via timed small dummy packets and a prefetcher that triggers grants before real data. The system infers LTE timing from packet‑pair measurements without root, runs across 375 cells and four apps on four US carriers, adds small signaling and marginal battery cost, and also helps 5G RTTs.
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chapters (7)
- 0:00Introduction to LTE latency
- 1:34Identifying network bottlenecks
- 2:58Analyzing latency elements
- 5:12The LRP solution
- 7:28Inference and implementation
- 9:35Evaluation and results
- 11:28Conclusion and resources
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