Ideas.
Working notions, half-arguments, the kind of thinking that ends up in the discussion section of a paper. None of these are settled.
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01 age of information Latency is not freshness.
We chase milliseconds when the right question is often how stale. A control loop with 3ms delivery but unsteady cadence can be worse than 5ms with predictable arrival. Age of Information — the time elapsed since the most recent useful update — captures something that p99 latency hides. The protocol design space looks different once you stop optimizing delay alone.
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02 tsn Time is a first-class network primitive.
TSN treats time the way IP treats addresses: a primitive every node agrees on. That single decision changes everything downstream — scheduling, isolation, recovery, observability. The hard part is not the abstraction. It is the synchronization machinery and the kernel paths underneath that have to be honest about it.
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03 urllc The robot does not care about your average.
URLLC is a worst-case discipline. A robotic arm or a haptic loop tolerates the 99.99th percentile, not the mean. The interesting experiments are the long-tail ones, and most testbeds quietly elide them — because reproducing tail behaviour is expensive and the headlines are easier on the average.
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04 5g–tsn 5G alone is not deterministic. TSN alone is not wireless.
Bridging the two is the unglamorous middle of the next decade of industrial communication. The standards are maturing; the implementations are not. Most of what I build lives in that gap — translating between scheduling philosophies that were never designed for each other.
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05 network coding Recover. Do not retransmit.
When the round trip is the budget, retransmission is bankruptcy. Network coding offers a different move: reconstruct what was lost from what survived. Done carefully — with the right history length, the right verification — it buys reliability without the latency tax.
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06 methodology Evaluate on what people actually deploy.
It is tempting to test on bespoke hardware: results are clean, numbers are kind. They rarely transfer. Commodity NICs, mainline Linux, off-the-shelf 5G modems — that is where the gap between theory and practice lives, and where I prefer to look.