11.2.13 Packet Power Control/Timing Advance

3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS

This message is sent on PACCH by the network to the mobile station in order to update the mobile station timing advance or power control parameters.

Message type: PACKET POWER CONTROL/TIMING ADVANCE

Direction: network to mobile station

Classification: non-distribution message

Table 11.2.13.1: Packet POwer CONTROL/TIMING ADVANCE information elements

< Packet Power Control/Timing Advance message content > ::=

< PAGE_MODE : bit (2) >

{ 0 < Global TFI : < Global TFI IE > >

{ 0 — Message escape

{ { 0 | 1 < Global Power Control Parameters : < Global Power Control Parameters IE >> }

{ 0 < Global Packet Timing Advance : < Global Packet Timing Advance IE > >

< Power Control Parameters : < Power Control Parameters IE > >

| 1 { 0 < Global Packet Timing Advance : < Global Packet Timing Advance IE > >

| 1 < Power Control Parameters : < Power Control parameters IE > > } }

{ null | 0 bit** = < no string > — Receiver backward compatible with earlier version

| 1 — Additions for R99

{ 0 | 1 < Packet Extended Timing Advance : bit (2)> }

{ null | 0 bit** = < no string > — Receiver backward compatible with earlier version

| 1 — Additions for REL-7

{ 0 | 1 < Carrier Identification : bit (2) > }

{ null | 0 bit** = < no string > — Receiver backward compatible with earlier version

| 1 — Additions for REL-12

{ 0 | 1 < Carrier Count : bit (4) >

< DLMC Carrier Bitmap : bit (val(Carrier Count) + 1) }

< padding bits > } } }

! < Non-distribution part error : bit (*) = < no string > > }

! < Message escape : 1 bit (*) = <no string> > }

! < Address information part error : bit (*) = < no string > > }

! < Distribution part error : bit (*) = < no string > > ;

Table 11.2.13.2: Packet POwer CONTROL/TIMING ADVANCE information element details

Global Power Control Parameters IE
This information field is defined in sub-clause 12.9.

Global_Packet Timing Advance IE
This information field is defined in sub-clause 12.12a.

Power Control Parameters IE
This information element contains the power control parameters the mobile station shall use to determine its TX power level. If this information element does not include the updated power control parameters for some of currently assigned timeslots, the MS shall continue to use the current power control parameters for these timeslots. This information field is defined in sub-clause 12.13.

Global TFI IE
This information element contains the TFI of the mobile station’s downlink TBF or uplink TBF. This field is defined in sub-clause 12.10.

Packet Extended Timing Advance (2 bit field)
This field is defined in sub-clause 12.12b.

Carrier Identification (2 bit field)

This field identifies the carrier to which the Power Control Parameters refers.

bit

0 0 Power Control Parameters applies to both carriers

0 1 Power Control Parameters applies to carrier 1

1 0 Power Control Parameters applies to carrier 2

1 1 Reserved for future use

DLMC Carrier Bitmap (1 – 16 bit field)

This field identifies the carrier(s) to which the Power Control Parameters are applicable for a DLMC configuration. In the absence of this field the MS shall assume the Power Control Parameters applies to all downlink carriers assigned for the DLMC configuration.

The most significant bit of this bitmap (bit N) refers to the lowest number carrier in the DLMC configuration and the least significant bit of this bitmap (bit 1) refers to the highest number carrier in the DLMC configuration. Each bit position in this bitmap is coded as follows:

0 The Power Control Parameters are not applicable
1 The Power Control Parameters are applicable