I often see latency being touted as the game changer for 5G.
With compute being pushed out closer to customers "Mobile Edge Compute"
Could anyone enlighten me to what the use cases are? Because it's still dubious.
Could anyone enlighten me to what the use cases are? Because it's still dubious.
Other fuzzier ones are, uh, crunch live video or audio captured by the device via beefy compute to... display overlays? Search similar products? Live translation? Calculate evasive maneuvers? A lot of these are limited by interface concerns that introduce human or other 'latency' anyway, making connectivity latency between the base station where the 'edge' is, and the device itself less of an issue.
I have a Samsung TV which, if it is not in "game mode" introduces much more latency than my DSL internet.
I couldn't win at Titanfall at all with the TV in normal mode, in game mode I was able to progress halfway up the leaderboard.
So far as I can tell, "Edge" is for people who think AWS isn't expensive enough and they'd rather pay AT&T or American Tower prices.
I have between 40ms and 200ms on 4g. Average around 80, with often peaks above 300ms.
When it's a pure video feed you get the impact of all the latency all the time, and that means the problem has to be solved with brute force reduction of bottlenecks everywhere.
So how much latency is enough for responsiveness? This is pretty easy to derive from the common target framerates: for 30hz display, you need 33.3ms. For 60hz, 16.6ms, for 120hz, 8.3ms. Since perceptual latency is known to keep improving up through 144hz it's reasonable to say that we should be looking for only 5-6ms at most, while most broadband connections are still achieving pings in the 20-100ms range, depending on the game and the specific connection. On the very best connections, that is, we can assume a "30hz transparent" video stream, which is fine for casual experiences but severely impacts competitive ability when tested. In many current popular titles this manifests in mechanics that are both latency sensitive and require a server roundtrip, e.g. building in Fortnite.
That seems implausible to me. We already have the equivalent of supercomputers in our pockets, and yet the trend is to move computing away from the end user, onto centralized servers.
really though, the waves aren't faster than lightspeed. Although lightspeed in different media might depend on frequency, indeed, I do not think that's the problem, rather than congestion, because the refraction index of Air is close to 1.
Congestion is a typical problem, though. ""Mobile Edge Compute"", what about "capsule networks"?