LTE_01 Flashcards
How is SMS handled in LTE?
It is a NAS service supported by the MME.
What are the end points for an EPS Bearer Service?
The UE and P-GW. Evloved Packet System
What are the end points for NAS signalling?
The UE and MME.
Why would you want to limit access through Congestion Control?
To preserve retainability for Connected users.
How often does the UE measure RSRP?
At least every DRX cycle.
What is the duration of a frame?
10ms (100 frames/sec)
What is the duration of a sub-frame?
1ms (1000 sub-frames/sec)
What parameter limits the UE transmit power?
pMaxServingCell
What is the criteria for Event A1?
Serving becomes better than threshold
What is the criteria for Event A2?
Serving becomes worse than threshold
What is the criteria for Event A3?
Neighbor cell becomes better then service cell by an offset value
What is the criteria for Event A4?
Neighbor cell becomes better than threshold
What is the criteria for Event A5?
Serving becomes worse than threshold 1 and LTE neighbor becomes better than threshold 2.
What is the criteria for Event B1?
Irat neighbor becomes better than threshold
What is the criteria for Event B2?
Serving becomes worse than threshold 1 and Irat neighbor becomes better than threshold 2.
How many Utran frequency relations are supported from LTE?
Up to 16
How many EUtran frequency relations are supported from LTE?
Up to 8
How many InterFrequency EUtran relations are supported from LTE?
Up to 64 from each of up to 8 EUtrtan frequency relations.
What is the modulation used by the Reference Signal?
QPSK
What layer is responsible for IP header compression and ciphering?
PDCP - Packet Data Convergence Protocol.
What are the counters for UL and DL PRB Utilization?
pmPrbUtilUl and pmPrbUtilDl
What do the PRB utilization counters reflect?
PUSCH or PDSCH utilization
What are the dimensions of a Resource Element?
1 symbol by 1 sub-carrier.
How many users are supported per TTI?
6 in the DL, 4 in the UL with 12 UL or DL per eNb.
What composes a Resource Element Group (REG)?
4 consecutive Resource Elements (RE) not including REs used for the Reference Signal.
What is a Control Channel Element (CCE) composed of?
A group of 9 consecutive Resource Element Groups (REG).
