11.2.43 PS Handover Command

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 the PACCH by the network to the mobile station to command the mobile station to leave the current cell and change to a new cell. The mobile station shall acknowledge this message according to sub-clause 8.10.4. This message can be sent using Extended RLC/MAC control segmentation (see sub-clause 9.1.12a). The combined length of the IEs included in the PS HANDOVER COMMAND message shall not exceed 175 octets.

If the network allocates PS resources on a single carrier where those resources are not required to support any of the features EGPRS2, Fast Ack/Nack Reporting or RTTI configurations, then the network shall include the PS Handover Radio Resources Info IE in the PS HANDOVER COMMAND message. Otherwise, the network shall include the PS Handover Radio Resources 2 Info IE or the PS Handover Radio Resources 3 IE the PS HANDOVER COMMAND message.

Message type: PS HANDOVER COMMAND

Direction: network to mobile station

Classification: non-distribution message

Table 11.2.43.1: PS HANDOVER COMMAND information elements

< PS Handover Command message content > ::=

< PAGE_MODE : bit (2) >

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

{ — Non-distribution part

< CONTAINER_ID : bit(2) >

{ 00 < PS Handover to A/Gb Mode Payload :

{ 00 < PS Handover RR Info: < PS Handover Radio Resources IE > >

| 01 < PS Handover RR 2 Info: < PS Handover Radio Resources 2 IE > >

| 10 < PS Handover RR 3 Info: < PS Handover Radio Resources 3 IE > >

! < RR Handover RR Info Error : { 11 } bit (*) = <no string> > } – Extended for future changes

{ 0 | 1 < NAS Container for PS Handover IE > }

| 01 < PS Handover to UTRAN Payload :

< RRC Container IE > >

| 10 < PS Handover to E-UTRAN Payload :

< RRC Container IE > >

! < Message escape : 11 bit (*) = < no string > > } — Extended for future changes

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

| 1 — Additions in Rel-8 :

{ 0 | 1 < E-UTRAN_CCN_ACTIVE : bit (1) >  }

{ 0 | 1 < Measurement Control Parameters Description :

< MeasurementControl Parameters Description IE>>}

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

| 1 — Additions for Rel-9

< Enhanced Flexible Timeslot Assignment : bit >

{ 0 < EMST_NW_Capability : bit (1) > — EMST is not used

| 1 — EMST is used

{ 0

| 1 < Downlink RLC Entity 2 : < RLC Entity Struct >

{ 0

| 1 < Downlink RLC Entity 3 : < RLC Entity Struct > }

}

{ 0

| 1 < Uplink RLC Entity 2 : < RLC Entity Struct >

{ 0

| 1 < Uplink RLC Entity 3 : < RLC Entity Struct > }

}

}

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

| 1 — Additions for Rel-10

{ 0 — EMSR is not enabled in downlink

| 1 — EMSR is enabled in downlink

{ 1 < EMSR Additional PFCs 1 : < Additional PFCs struct > > } ** 0

{ 1 < EMSR Additional PFCs 2 : < Additional PFCs struct > > } ** 0

{ 1 < EMSR Additional PFCs 3 : < Additional PFCs struct > > } ** 0

}

{ 0 — EMSR is not enabled in uplink

| 1 — EMSR is enabled in uplink

{ 1 < EMSR Additional PFCs 1 : < Additional PFCs struct > > } ** 0

{ 1 < EMSR Additional PFCs 2 : < Additional PFCs struct > > } ** 0

{ 1 < EMSR Additional PFCs 3 : < Additional PFCs struct > > } ** 0

}

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

| 1 — Additions for Rel-11

{ 0 I 1 < Selected PLMN Index : bit(3) >}

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

| 1 — Additions for Rel-12

< Primary TSC Set : bit (1) >

{ 0 | 1 — Secondary DL TSC Value assigned

< Secondary DL TSC Set : bit (1) >

< Secondary DL TSC Value : bit (3) > }

< padding bits > } } } } }

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

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

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

< RLC Entity Struct > :: =

< TFI : bit (5) >

< RLC_MODE : bit (1) >

{ 0 | 1 < EGPRS Window Size : < EGPRS Window Size IE > > }

< PFI : bit (7) >;

< Additional PFCs struct > ::=

< TFI : bit (5) >

{ 0 | 1 < NPM Transfer Time : bit (5) > }

< PFI : bit (7) >;

Table 11.2.43.2: PS HANDOVER COMMAND information element details

PAGE_MODE (2 bit field)
This field is defined in sub-clause 12.20.

Global TFI
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.

CONTAINER_ID (2 bit field)
This field contains the identity of the neighbour cell system information container previously sent in the PACKET NEIGHBOUR CELL DATA messages (see sub-clause 8.10.2). This field is ignored by the mobile station except in the case of PS Handover from GERAN A/Gb mode or GERAN Iu mode to GERAN A/Gb or GERAN Iu mode.

Range 0 to 3.

PS Handover to A/Gb Mode Payload
This information element contains the information needed by the mobile station when performing PS Handover to A/Gb mode. It consists of the PS Handover Radio Resources IE (see sub-clause 12.42) or the PS Handover Radio Resources 2 IE (see sub-clause 12.42a) or the PS Handover Radio Resources 3 IE (see sub-clause 12.42b) and optionally the NAS Container for PS Handover IE (see sub-clause 12.43).

PS Handover to UTRAN Payload
This information element contains a HANDOVER TO UTRAN COMMAND message (as defined in 3GPP TS 25.331) containing the information needed by the mobile station when performing PS Handover to UTRAN. This information element is defined in sub-clause 12.45b.

PS Handover to E-UTRAN Payload
This information element contains a DL-DCCH-Message including a RRCConnectionReconfiguration message (as defined in 3GPP TS 36.331) containing the information needed by the mobile station when performing PS Handover to E-UTRAN. This information element is defined in sub-clause 12.45b.

E-UTRAN_CCN_ACTIVE (1 bit field)
This field indicates whether CCN is enabled towards E-UTRAN neighbouring cells in the target cell. For description and encoding see subclause 12.53. This field shall be included only if the PS Handover to A/Gb Mode Payload structure is included.

Enhanced Flexible Timeslot Assignment (1 bit field)

This field is defined in sub-clause 11.2.29.

Measurement Control Parameters Description

This information element contains the Measurement control parameters per frequency for UTRAN and E-UTRAN for the target cell. This information element is defined in sub-clause 12.56. This field shall be included only if the PS Handover to A/Gb Mode Payload structure is included.

EMST_NW_Capability (1 bit field)

This information element is defined in sub-clause 11.2.29.

PFI (7 bit field)

This information element is defined in sub-clause 11.2.31.

TFI (5 bit field)

This information element is defined in sub-clause 11.2.31.

RLC_MODE (1 bit field)

This information element is defined in sub-clause 11.2.31.

NPM Transfer Time (5 bit field)

EMSR Additional PFCs 1

EMSR Additional PFCs 2

EMSR Additional PFCs 3

These IEs are defined in section 11.2.7. If the PS HANDOVER COMMAND message includes the PS Handover Radio Resources 3 IE then these information elements shall be ignored (if included).

Selected PLMN Index (3 bit field)

This field is defined in sub-clause 10.4.27

PS Handover RR 3 Info

This information is included when performing a PS handover that results in a DLMC configuration (see sub-clause 12.42b).

Primary TSC Set (1 bit field)

See sub-clause 11.2.7 and 11.2.29.

Secondary DL TSC Set (1 bit field)

See sub-clause 11.2.7.

Secondary DL TSC Value (3 bit field)

See sub-clause 11.2.7.