5G Course - all about LATENCY in 5G | RAN features | Scheduling | SINR

Описание: I start this video with definitions:
What is latency? What is delay? What is Round Trip Time and ping time?
What is Jitter and Time-to-Connect?
Then I consider end-to-end latency budget in 5G network architecture, starting from UE capabilities, RAN latency features and end-user impact.
I show how RAN features, TDD patters, scheduling and handovers could impact on overall latency.
I also explain latency reasons in Transport, Core networks and VR/AR latency requirements.
In addition, I propose methods on latency testing, including drive-tests, ping and TWAMP protocols.

⏰Time codes:
0:22 - Agenda
1:32 - Latency issue
2:15 - What is latency?
3:37 - What is Round Trip Time?
4:42 - Ping time = latency/RTT?
5:37 - Minimum RTT
6:37 - Latency jitter
7:45 - Latency and Time to Connect
8:27 - E2E Latency budget
10:38 - UE capability aspects
12:14 - Latency and SINR
13:20 - Latency and Numerology/SCS
15:26 - Freq bands for low latency
17:11 - FDD and TDD patterns for low latency
18:17 - 5G mini-slot for low latency
19:35 - 5G self-contained slot for low latency
20:45 - Scheduling impact on latency
20:02 - Grant-free scheduling and latency
23:07 - Scheduling optimization for low latency
25:43 - Scheduling impact examples
26:11 - UE mobility and 5G DAPS handover
28:15 - RAN latency during handovers
29:29 - DAPS Handover limitations
30:12 - RRC inactive state impact
31:02 - RAN features for improving latency
32:23 - 5G SA vs NSA latency
33:15 - Transport and Core latency
34:36 - Propagation delay in optic fiber and URLLC
36:24 - TCP/IP congestion delay
37:30 - X2/Xn overload
38:17 - Drive-Test latency testing
41:05 - Ping latency testing
43:00 - UE PHY/MAC latency testing
46:22 - TWAMP latency testing
50:03 - Latency impact on UE QoE
51:02 - Rohde&Schwarz QoE model
52:18 - Latency User Case requirements
54:23 - Latency - new vector for attracts!

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