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LTE > LTE_01 > Flashcards

LTE_01 Flashcards

1
Q

How is SMS handled in LTE?

A

It is a NAS service supported by the MME.

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2
Q

What are the end points for an EPS Bearer Service?

A

The UE and P-GW. Evloved Packet System

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3
Q

What are the end points for NAS signalling?

A

The UE and MME.

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4
Q

Why would you want to limit access through Congestion Control?

A

To preserve retainability for Connected users.

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5
Q

How often does the UE measure RSRP?

A

At least every DRX cycle.

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6
Q

What is the duration of a frame?

A

10ms (100 frames/sec)

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7
Q

What is the duration of a sub-frame?

A

1ms (1000 sub-frames/sec)

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8
Q

What parameter limits the UE transmit power?

A

pMaxServingCell

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9
Q

What is the criteria for Event A1?

A

Serving becomes better than threshold

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10
Q

What is the criteria for Event A2?

A

Serving becomes worse than threshold

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11
Q

What is the criteria for Event A3?

A

Neighbor cell becomes better then service cell by an offset value

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12
Q

What is the criteria for Event A4?

A

Neighbor cell becomes better than threshold

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13
Q

What is the criteria for Event A5?

A

Serving becomes worse than threshold 1 and LTE neighbor becomes better than threshold 2.

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14
Q

What is the criteria for Event B1?

A

Irat neighbor becomes better than threshold

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15
Q

What is the criteria for Event B2?

A

Serving becomes worse than threshold 1 and Irat neighbor becomes better than threshold 2.

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16
Q

How many Utran frequency relations are supported from LTE?

A

Up to 16

17
Q

How many EUtran frequency relations are supported from LTE?

A

Up to 8

18
Q

How many InterFrequency EUtran relations are supported from LTE?

A

Up to 64 from each of up to 8 EUtrtan frequency relations.

19
Q

What is the modulation used by the Reference Signal?

A

QPSK

20
Q

What layer is responsible for IP header compression and ciphering?

A

PDCP - Packet Data Convergence Protocol.

21
Q

What are the counters for UL and DL PRB Utilization?

A

pmPrbUtilUl and pmPrbUtilDl

22
Q

What do the PRB utilization counters reflect?

A

PUSCH or PDSCH utilization

23
Q

What are the dimensions of a Resource Element?

A

1 symbol by 1 sub-carrier.

23
Q

How many users are supported per TTI?

A

6 in the DL, 4 in the UL with 12 UL or DL per eNb.

24
Q

What composes a Resource Element Group (REG)?

A

4 consecutive Resource Elements (RE) not including REs used for the Reference Signal.

25
Q

What is a Control Channel Element (CCE) composed of?

A

A group of 9 consecutive Resource Element Groups (REG).

LTE (1 decks)

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