Table of Contents

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Foreword
Foreword
1 Scope
  1.1 References
  1.2 Definitions and abbreviations
2 General description of synchronization system
3 Timebase counters
  3.1 Timing state of the signals
  3.2 Relationship between counters
4 Timing of transmitted signals
5 BTS Requirements for Synchronization
  5.1 Frequency source
  5.2 Timebase counters
  5.3 Internal BTS carrier timing
  5.4 Initial Timing advance estimation
  5.5 Maximum timing advance value
  5.6 Delay tracking
  5.7 Timeslot length
  5.8 Range of Timing advance
6 MS Requirements for Synchronization
  6.1 MS carrier frequency
  6.2 Internal timebase
  6.3 Assessment of BTS timing
  6.4 Timing of transmission
  6.5 Application of Timing Advance
  6.6 Access to a new BTS
  6.7 Temporary loss of signal
  6.8 Timing of channel change
  6.9 Application of new Timing Advance value
  6.10 Definition of "ready to transmit within x ms"
  6.11 Definition of additional reaction times for GPRS mobile
       stations
  6.12 Observed Frequency Offset (OFO) reported by the CTS-MS
  6.13 Timing of intersystem channel change from GSM to UTRAN
  6.14 Timing of combined intracell channel change and packet
       assignment
7 CTS-FP Requirements for Synchronization
  7.1 Frequency source default requirements
  7.2 Frequency source for a CTS-FP assisted by a CTS-MS
  7.3 Internal CTS-FP carrier timing
  7.4 Timeslot length
  7.5 Assessment of CTS-MS delay
Annex A (normative): Additional requirements for
        pseudo-synchronization, synchronized handovers and
        pseudo-synchronized handovers
      A.1 General descriptions and definitions
      A.2 BTS requirements
      A.3 MS requirements
Annex B (informative): CTSBCH timeslot shifting properties
        for CTS-MS synchronization
      B.1 Determination of TN by the CTS-MS when CTSBCH shifting
          is not active
      B.2 Determination of TN by the CTS-MS when CTSBCH shifting
          is active
Annex C (informative): BTS frequency source stability and E-OTD LMU
        reporting periods for LCS
      C.1 BTS frequency source stability and E-OTD LMU reporting
          periods
      C.2 Frequency source stability
      C.3 Relationship to E-OTD reporting periods
Annex D (informative): Change history
History

Abstract

Describes the requirements for synchronization on the radio sub-system of the digital cellular telecommunications systems GSM.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	3GPP GERAN 1