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WCDMA Based Events

Here you can get the basic idea of WCDMA Based Events

WCDMA Based Events

  1. 1. 3G Based Events BY: M ISMAIL RAZA
  2. 2. Event Range Count Relation 1 A-I Primary Pilot Channel 2 A-F Frequency 3 A-D Quality 4 A-B Channel Traffic Volume 5 A-A CRCs 6 A-G Rx-Tx 7 A-C Location / Position RRC Reporting events or Handover events are sent from RBS or UE to trigger the different handover procedures in the RNC. The generation of handover events depend on the different RF parameters and thresholds.
  3. 3. 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. 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 Primary Pilot Channel
  4. 4. 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 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) Primary Pilot Channel
  5. 5. 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 Event 2C 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. Event 2E • The estimated quality of a non-used frequency is below a certain threshold. • The estimated quality of a non-used frequency is above 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 Frequency
  6. 6. 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 Event 3C Event 3D • Change of best cell in other system • The estimated quality of other system is above a certain threshold Quality
  7. 7. Event 4A • Transport Channel Traffic Volume becomes larger than an absolute threshold Event 4B • Transport Channel Traffic Volume becomes smaller than an absolute threshold Channel Traffic Volume
  8. 8. Event 5A • A predefined number of bad CRCs is exceeded CRCs
  9. 9. Event 6A • The UE Tx power becomes larger than an absolute threshold; start compressed mode Event 6B • The UE Tx power becomes less than an absolute threshold; stop compressed mode Event 6C Event 6D • The UE Tx power reaches its maximum value Event 6E • The UE RSSI reaches the UE's dynamic receiver range • The UE Tx power reaches its minimum value Event 6F • The UE Rx-Tx time difference for a RL included in the active set becomes larger than an absolute threshold Event 6G • The UE Rx-Tx time difference for a RL included in the active set becomes less than an absolute threshold Rx-Tx
  10. 10. 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 Location / Position
  11. 11. References • http://www.telecomsource.net/showthread.php?1441- What-are-the-events-1a-1b-1c-etc
  12. 12. THE END 

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