3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS
The Packet Timing Advance field describes the timing advance mode and timing advance value assigned to the mobile station.
Table 12.12.1: Packet Timing Advance information elements
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< Packet Timing Advance IE > ::=
{ 0 | 1 < TIMING_ADVANCE_VALUE : bit (6) > }
{ 0 | 1 < TIMING_ADVANCE_INDEX : bit (4) >
< TIMING_ADVANCE_TIMESLOT_NUMBER : bit (3) > } ;
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Table 12.12.2: Packet Timing Advance information element details
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TIMING_ADVANCE_VALUE (6 bit field)
If the TIMING_ADVANCE_VALUE field is present, the mobile station shall use the value contained therein after time defined in 3GPP TS 45.010. If the TIMING_ADVANCE_VALUE field is not present the mobile station shall not change its timing advance value. The Timing Advance value field is encoded the same as the Timing Advance value of the Timing Advance information element defined in 3GPP TS 44.018
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TIMING_ADVANCE_INDEX (4 bit field)
If the TIMING_ADVANCE_INDEX and TIMING_ADVANCE_TIMESLOT_NUMBER fields are present the mobile station shall begin operation of the Continuous Timing Advance procedure at the point in time denoted by the TBF starting time if present, otherwise after the reaction time specified in 3GPP TS 45.010.. If these two fields are not present the mobile station shall stop operation of the Continuous Timing Advance procedure. This information field is encoded as a binary representation of the Timing Advance Index defined in 3GPP TS 45.002.
Range 0 to 15.
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TIMING_ADVANCE_TIMESLOT_NUMBER (3 bit field)
This field indicates the timeslot assigned for the Continuous Timing Advance procedure on the PTCCH. This field is coded as the binary representation of the timeslot number as defined in 3GPP TS 45.010.
Range 0 to 7
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