A.Component carrier refers to the carrier corresponding to different cells participating in carrier aggregation

B.The secondary cell refers to a cell that is configured to the CA UE through RRC connection signaling and works on the secondary carrier to provide more radio resources for the CA UE. SCell only has downlink and no uplink

C.The primary cell is the cell in which the CA UE resides, that is, the primary serving cell. The operation of the CA UE in this cell is no different from other R8/9 cells. Only the PCell has the PUCCH channel.

D.PCC anchor point, which refers to the high priority resident PCC selected by the eNodeB

A.The angle of the sector in the station should be kept as close as possible to 60 degrees, direct sparring between stations can enhance coverage

B.Topological structure planning: the site distribution is as uniform as possible

C.Station height control: strictly control the station height to avoid over-zone interference

D.Station spacing control: strictly avoid overlapping coverage sites within 100m

A.EPF (Enhanced Proportion Fair)

B.PF (Proportional Fair)

C.RR (Round Robin)

D.Max C/I

A.Srxlev>0 or Squal>0

B.Srxlev>0

C.Srxlev>0 and Squal is greater than 0

D.Squal>0

A.Terminal autonomous CSFB

B.When an emergency call is made, the VOLTE user can dial the emergency number through CSFB.

C.IMS network guides user CSFB through parameter configuration

D.The VOLTE call flow is abnormal, and the terminal connects to the call through the CS network.