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1. 3G/(WCDMA)/(UMTS)
Events Description
• BY-ANKUR TOMAR
• Email Id-
ankurtomar915.at@gmail.com

2. EVENTS IN 3G(WCDMA)
 Primary Pilot Channel-
Event 1A,1B,1C,1D,1E,1F,1G,1H,1I
 Frequency-
Event 2A,2B,2C,2D,2F
 Quality-
Event 3A,3B,3C,3D
 Channel Traffic Volume-Event 4A ,4B
 CRCs-Event 5A
 Rx-Tx-Event 6A,6B,6C,6D,6F,6G
 Location / Position-Event 7A ,7B,7C

3. Primary Pilot Channel
• Event 1A
A Primary CPICH (Primary Pilot Channel)
enters the reporting range; addition of a radio
link.
• Event 1B
A primary CPICH (Primary Pilot Channel)
leaves the reporting range; removal of a radio
link.

4. Primary Pilot Channel
• Event 1C
A non-active primary CPICH (Primary Pilot
Channel) becomes better than an active
primary CPICH; replacement of the worst cell
in AS.
• Event 1D
Change of best cell

5. Primary Pilot Channel
• Event 1E
A Primary CPICH (Primary Pilot Channel)
becomes better than an absolute threshold.
• Event 1F
A primary CPICH (Primary Pilot Channel)
becomes worse than an absolute threshold

6. Primary Pilot Channel
• Event 1G
Change of best cell (TDD) .
• Event 1H
Timeslot ISCP below a certain threshold
(TDD)
• Event 1I
Timeslot ISCP above a certain threshold
(TDD)

7. Frequency
• Event 2A
Change of best frequency.
• Event 2B
The estimated quality of the currently used
frequency is below a certain threshold and the
estimated quality of a non-used frequency is
above a certain threshold; handover to inter-
frequency neighbors

8. Frequency
• Event 2C
The estimated quality of a non-used
frequency is above a certain threshold.
• Event 2D
The estimated quality of the currently used
frequency is below a certain threshold; start
compressed mode to measure inter-frequency
WCDMA or GSM neighbors.

9. Frequency
• Event 2E
The estimated quality of a non-used
frequency is below a certain threshold.
• Event 2F
The estimated quality of the currently used
frequency is above a certain threshold; stop
compressed mode & stop measure inter-
frequency WCDMA or GSM neighbors

10. Quality
• Event 3A
The estimated quality of the currently used
UTRAN frequency is below a certain
threshold and the estimated quality of the
other system is above a certain threshold;
handover to GSM neighbors.
• Event 3B
The estimated quality of other system is
below a certain threshold.

11. Quality
• Event 3C
The estimated quality of other system
is above a certain threshold.
• Event 3D
• Change of best cell in other system.

12. Channel Traffic Volume
• Event 4A
Transport Channel Traffic Volume becomes
larger than an absolute threshold.
• Event 4B
Transport Channel Traffic Volume becomes
smaller than an absolute threshold

13. CRCs
• Event 5A
A predefined number of bad CRCs is
exceeded.

14. Rx-Tx
• Event 6A
The UE Tx power becomes larger than an
absolute threshold; start compressed.
• Event 6B
The UE Tx power becomes less than an
absolute threshold; stop compressed mode.

15. Rx-Tx
• Event 6C
The UE Tx power reaches its minimum
value.
• Event 6D
The UE Tx power reaches its maximum
value.

16. Rx-Tx
• Event 6E
The UE RSSI reaches the UE's dynamic
receiver range.
• Event 6F
The UE Rx-Tx time difference for a RL
included in the active set becomes larger than
an absolute threshold.

17. Rx-Tx
• Event 6G
The UE Rx-Tx time difference for a RL
included in the active set becomes less than an
absolute threshold.

18. Location / Position
• Event 7A
• The UE position changes more than an
absolute threshold.
• Event 7B
SFN-SFN measurement changes more than
an absolute threshold.
• Event 7C
GPS time and SFN time have drifted apart
more than an absolute threshold

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