- 25 Mar, 2021
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- 38 Secs Read
4G/LTE and VoIP
Q1: In the following charts,
(a) if MOS >=4, which codec will you choose to reach the best bandwidth utilization. Explain the reason with sufficient details.
(b) Between G.711 5 ms frames and G.711 20 ms frames, which one has better bandwidth utilization?
(c) Between G.711 20 ms frames and G.729 20 ms fames, which one has better bandwidth utilization? ‘ms’ means millisecond.
[NB: Please use the pdf file captioned “WK9_Part2_QoS_KPI” and other resources you may find online]
Q2: Describe cellular network 4G LTE security protocols in terms of all security associations between two end points, authentication protocols, encryption protocols, client-authenticate-server, server-authenticate-client, and any special security features in sufficient details. [Please use the slide captioned “WK11_Park3_LTE_Security_v2” and other resources online to answer this question]