Q. Which QCI is defined for conversational voice GBR?
a) QCI 7
b) QCI 1
c) QCI 5
d) QCI 9
Check 🔎
Correct answer: Letter b.
In the EPS QoS framework, QCI 1 is reserved for conversational voice traffic with Guaranteed Bit Rate (GBR). It ensures low latency, low packet error rates, and strict priority handling, which are critical for VoLTE voice services.
QCI 1 is associated with a dedicated bearer that guarantees the required QoS parameters for real-time conversational voice.
Q. Which QCI is defined for conversational voice GBR?
a) QCI 7
→ Incorrect. QCI 7 is used for video services with less stringent delay requirements.
b) QCI 1
→ Correct. Specifically defined for conversational voice GBR traffic in LTE networks.
c) QCI 5
→ Incorrect. QCI 5 is typically reserved for signaling bearer traffic.
d) QCI 9
→ Incorrect. QCI 9 is usually the default bearer QCI, with non-GBR characteristics for general best-effort traffic.
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