The power back-off under carrier aggregation is mainly to avoid power shortage when the two downlink carriers are aggregated.

• A.True
• B.False

Comment: *

Name: *

Email: *

Verification: *

Which of the following descriptions is correct?

• A.If the user's default APN is signed as the IMS APN in the HSS, the data APN is non-default, which will cause the user to activate the first default bearer with IMSIPN in all scenarios.
• B.There are default bearers and dedicated bearers in LTE. Voices for VoIP must use dedicated bearers.
• C.In the Attach request, the UE will report the LTE voice capability (whether CSFB or VoIP is supported) to the MME.
• D.The attach type initiated by the VoLTE user is EPS-attach, and the attach type initiated by the CSFB user is combined attach.

Comment: *

Name: *

Email: *

Verification: *

Which descriptions are correct about the 0.5TTI characteristics? (Multiple Choice)

• A.Improve the business capacity of small packages
• B.Improve end-to-end transmission delay
• C.Increase the number of residential users
• D.Shorten the port delay

Comment: *

Name: *

Email: *

Verification: *

When X2 handover cannot be performed between eNodeBs, S1 handover is performed.

• A.False
• B.True

Comment: *

Name: *

Email: *

Verification: *

Which system carries the cell reselection control parameters of the 2G network in the LTE system?

• A.SIB7
• B.SIB5
• C.SIB6
• D.SIB8

Comment: *

Name: *

Email: *

Verification: *