What are the possible Causes of RRC Connection Setup Failures? "
- A . UE does not response
- B . Failed to allocate
- C . Number Of RRC Connection Request Messages Discarded Due to Flow Control.
- D . Authentication failed
Compared with SRVCC, which of the following Nes need to be added for eSRVCC?
- A . ATGW
- B . PCRF
- C . P-CSCF
- D . ATCF
What are the impacts of antenna alarms on the system?
A is Out Of service
B. The Signal quality of the mobile phone is unstable, and the call quality deteriorates
C Can drop or can disconnection
D. The access fails or the access success rate is low.
Which of the following are functions of UMPT?
A Pr«esses signaling manages resources for other boards in the BBU
B Provides a USB port, transmission ports. and a maintenance to perform automatic software upgrade.
transmit signals
C Support BBU maintenance on the LMT or U2000
D Manages configuration and devices. monitors performance. and processes signals
which of the following may cause RF resource exceptions?
A_ The RF board is unavailable
B. The RF networking and data do not match.
C. The versions of the main control board and RF unit do not match.
D. The CPRI line rate negotiation fails
which of the following interfaces can be traced by the signaling tracing function of the eNodeB
- A . SI1
- B . S1
- C . Uu
- D . X2"
what the purposes of random access
A Obtains uplink Scheduling Resources
B, Obtains downlink synchronization
C. Obtains downlink Scheduling Resources
D. Obtains uplink synchronization
which of the following are common fault location methods for end-to-end transmission faults
- A . Ping/TraceRT
- B . Capturing Packets Using Wireshark
- C . IPPM
- D . UDP packet injection and UDP loopback"
which of the following are advantages of book RRU
- A . High Integration
- B . Easy to deploy
- C . Macro micro coordination
- D . High power output
which of the following data need to be considered for the tramsmission bandwidth planning of an LTE site
- A . SI1 interface user plane data and control plane data
- B . OM data
- C . User plane data and control plane signaling over the X2 interface
- D . User plane data and control plane data of the S1 interface
- E . IP clock data
which of the following statements about MIB are correct
- A . Carried on BCCH – BCH – PBCH
B Frequency domain 62 subcarriers in the cneter of the system bandwidth - B . Time domain adjacent to the synchronization channel the sheduling period is 40ms
- C . Includes most important and common parameters system bandwidth, system frame number, and PHICH comfiguration information
which of the following options are available for NB-ioT uplink subcarrier bandwidth
- A . 3.75k
- B . 15k
- C . 180k
- D . 7.5k
which of the following systems are included in an eNodeB
- A . Baseband process system
- B . RF System
- C . Power system
- D . Antenna system
- E . Switching system
which of the folowing modulation modes are supported by the LTE system
- A . GMSK
- B . QPSK
- C . 64QAM
- D . 16QAM
when an LTE user uploads a file, which of the following channels must be used
- A . PSSCH
- B . PDCCH
- C . PRACH
- D . PUSCH"
Which of the following are the functions of the PDCCH
- A . Transmissio of uplink and downlink data scheduling signaling
- B . Downlink power control commands
- C . RACH response scheduling grant signaling
- D . Paging message scheduling authorization signaling
in NB-ioT which of the following are the unit of resource sheduling in the uplink and downlink
- A . REG
- B . RB
- C . RU
- D . Subframe
which of the following information can be carried on the PUSCH
- A . PMI
- B . SR
- C . CQI
- D . RI
which of the following actions is required to handle abnolmal uplink receive signals
- A . Intermodulation interfernce check (FDD)
- B . Channel attenuation configuration check (FDD)
- C . Spectrum Scanning
- D . RTWP/RSSI balance check
which of the following are the RLC functions
- A . Error correction
- B . Segmentation and re-assembly
- C . Padding
- D . Maintenance of SNs fo rradio bearers