41.6 Intra SGSN PS Handover

3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS

41.6.1 Intra SGSN PS Handover / Synchronized cell case

41.6.1.1 Intra SGSN PS Handover / Synchronized cell case / successful

41.6.1.1.1 Conformance requirements

The following synchronisation mechanisms are used for PS handover:

– Non-synchronised.

– Synchronised.

– Pre-Synchronised.

The synchronised and pre-synchronised cases are shown in figures 23 and 25 and have different mechanisms for the provision of the timing advance that are described in 3GPP TS 45.010 [26].

NOTE: The pseudo-synchronised case is not supported by the PS handover feature.

If the timing advance with the new cell calculated by the mobile station is not out of range, i.e. smaller than or equal to the maximum timing advance that can be coded as specified in 3GPP TS 44.004, or if the new cell does accept out of range timing advance as indicated in the PS HANDOVER COMMAND message, the mobile station acts on the message.

After having switched to the assigned channels, if the Handover Reference information is included within the PS HANDOVER COMMAND message the mobile station shall send four times the PS HANDOVER ACCESS message.

The mobile station activates the channels in sending and receiving mode. The MS may activate the channels in downlink while sending access bursts.

References

3GPP TS 43.129, subclasses 6.2.2

3GPP TS 44.060, subclasses 8.10.4.1 and 8.10.4.4.2.

41.6.1.1.2 Test purposes

To verify that while in uplink acknowledged mode operation the MS performs successfully synchronized PS Handover from A/Gb to A/Gb.

41.6.1.1.3 Method of test

Initial Conditions

System Simulator:

2 cells A and B, GPRS supported, NC 2 mode, PCCCH not present.

The RF level of cell A is –50 dBm and cell B – 60 dBm.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the assigned USF assigned to the MS. The MS sends a RLC radio block. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a minimum set of System Info Types in order to perform a A/Gb to A/Gb synchronized PS Handover by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell B. The MS moves to cell B and resumes the uplink data transfer. The MS completes the uplink data transfer.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 2000 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

In case of Uplink data block check that the coding and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

Sent on the PACCH of the assigned PDCH.

Containing : System Info Type 1, System Info Type 3 and

System Info Type 13.

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

7

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH . USF not assigned to the MS.

The following messages are received on cell B.

8

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

120 ms (T_GSM_delay) after step 7. USF assigned to the MS.

9

MS -> SS

PACKET UPLINK DUMMY CONTROL BLOCK or UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

Repeat steps 8 and 9 for maximum of 100 ms or until UPLINK RLC DATA BLOCK is received.

(Data block may contain empty LLC PDU for Cell Update. In that case the SS shall accept Packet Resource Request from MS and respond with Packet Uplink Assignment.)

NOTE: The empty LLC PDU may be accompanied by another low priority RLC data block (with Packet Resource Request and Packet Uplink Assignment as required), in order to ensure that the radio resources are used efficiently.

10

{Completion of uplink RLC data block transfer}

41.6.1.2 Intra SGSN PS Handover / Synchronized cell case / Abnormal Case / T3218 expiry

41.6.1.2.1 Conformance requirements

In case of initial access failure in the target cell, including the case where the MS fails to acquire time alignment information (for the unsynchronised network case), the MS is allowed to revert to the old cell. As is defined currently in 3GPP TS 44.060 [7], the MS shall return to the old cell and send a Packet Cell Change Failure message with the appropriate cause.

If the MS was in packet transfer mode (or MAC-shared state) before the attempted handover it will, when going back to the old cell, send a Packet Cell Change Failure message and resume TBFs which were ongoing in the old cell.

A mobile station operating in A/Gb mode shall consider the PS handover to A/Gb mode to have failed for the following reasons:

– Timer T3218 expires while in the new cell.

A mobile station operating in A/Gb mode when a PS handover to A/Gb mode fails shall proceed as follows:

– If timer T3218 expired it shall return to the cell on which the PS HANDOVER COMMAND message was received.

– Send a Packet Cell Change Failure message with the cause code set to "No response on target cell" if timer T3218 or T3216 expired, otherwise "PS Handover failure-others". The message shall be sent on PACCH .

– The transmission of a Packet Cell Change Failure message terminates the PS handover procedure in the mobile station and after the transmission of this message the mobile station is therefore allowed to request the establishment of additional uplink TBFs.

– After terminating the PS handover procedure the mobile station shall resume all uplink and downlink TBFs that were ongoing in the old cell prior to receiving the PS HANDOVER COMMAND message. Timers T3180 (uplink TBFs) and T3190 (downlink TBFs) corresponding to these TBFs shall be re-started.

– For each TBF that is resumed the corresponding RLC state machine shall reflect its state when the last RLC data block was transmitted for that TBF in the old cell (uplink TBFs) and the last RLC data block was received for that TBF in the old cell (downlink TBFs).

References

3GPP TS 43.129, subclasses 5.7.2.1

3GPP TS 44.060, subclasses 8.10.5.1

41.6.1.2.2 Test purposes

To verify that the MS, when PS handover failed due to T3218 expiry, returns to the cell on which PS HANDOVER COMMAND message was received, sends a PACKET CELL CHANGE FAILURE message with cause “No response on target cell” and resumes the TBFs that were ongoing in the old cell.

41.6.1.2.3 Method of test

Initial Conditions

System Simulator:

2 cells A and B, GPRS supported, NC 2 mode, PCCCH not present.

The RF level of cell A is –50 dBm and cell B – 60 dBm.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the USF assigned to the MS. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a minimum set of System Info Types in order to perform a A/Gb to A/Gb synchronized PS Handover by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell B. No USF is assigned to the MS on cell B for 1s (T3218). The SS assigns USF to the MS on the old cell A. MS send PACKET CELL CHANGE FAILURE with cause value “No response on target cell” and resumes the uplink data transfer.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 400 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

All instances are sent on the PACCH of the assigned PDCH.

Containing : System Info Type 1, System Info Type 3 and

System Info Type 13 of cell B.

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

7

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH. USF not assigned to the MS.

The following messages are sent on cell B.

8

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

Sent on PACCH assigned in step 7. USF not addressing the MS.

9

SS

Check that no data block is transmitted by the MS in the next radio block.

Steps 8 and 9 are repeated for 1s (T3218).

The following messages are sent 200 ms after step 9 on cell A.

10

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF allocated in PACKET UPLINK ASSIGNMENT from step 1 assigned to the MS.

11

MS -> SS

PACKET CELL CHANGE FAILURE

Cause:"No response on target cell”

12

{Completion of uplink RLC data block transfer}

41.6.1.3 Intra SGSN PS Handover / Synchronized cell case / Abnormal Case / Minimum set of SI not available

41.6.1.3.1 Conformance requirements

In case of initial access failure in the target cell, including the case where the MS fails to acquire time alignment information (for the unsynchronised network case), the MS is allowed to revert to the old cell. As is defined currently in 3GPP TS 44.060 [7], the MS shall return to the old cell and send a Packet Cell Change Failure message with the appropriate cause.

If the MS was in packet transfer mode (or MAC-shared state) before the attempted handover it will, when going back to the old cell, send a Packet Cell Change Failure message and resume TBFs which were ongoing in the old cell.

A mobile station operating in A/Gb mode shall consider the PS handover to A/Gb mode to have failed for the following reasons:

– If it has not stored a valid minimum set of the following of PSI or SI messages (provided via PACKET NEIGHBOUR CELL DATA messages, see sub-clause 8.8.1) required for mobile station to operate in the new cell: PSI1, a consistent set of PSI2 messages and PSI14 (if PBCCH allocated in the new cell) or SI3, SI1 (if present in the new cell) and SI13 messages (if PBCCH not allocated in the new cell).

A mobile station operating in A/Gb mode when a PS handover to A/Gb mode fails shall proceed as follows:

– Send a Packet Cell Change Failure message with the cause code set to "No response on target cell" if timer T3218 or T3216 expired, otherwise "PS Handover failure-others". The message shall be sent on PACCH .PACCH.

– The transmission of a Packet Cell Change Failure message terminates the PS handover procedure in the mobile station and after the transmission of this message the mobile station is therefore allowed to request the establishment of additional uplink TBFs.

References

3GPP TS 43.129, subclasses 5.7.2.1

3GPP TS 44.060, subclasses 8.10.5.1

41.6.1.3.2 Test purposes

To verify that the MS, when PS handover failed due to a valid minimum set of SI messages for the new cell not stored, returns to the cell on which PS HANDOVER COMMAND message was received, sends a PACKET CELL CHANGE FAILURE message with cause “PS Handover failure-others” and resumes the TBFs that were ongoing in the old cell.

41.6.1.3.3 Method of test

Initial Conditions

System Simulator:

2 cells A and B, GPRS supported, NC 2 mode, PCCCH not present.

The RF level of cell A is –50 dBm and cell B – 60 dBm.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the USF assigned to the MS. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a set of System Info Type 1 and 3 messages in PACKET NEIGHBOUR CELL DATA message but not System Info Type 13 for the new cell B.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell B. USF is assigned to the MS on cell B on the assigned PDCH and it is checked that the MS does not send RLC blocks on the new cell B.

The SS assigns USF to the MS on the old cell A. MS send PACKET CELL CHANGE FAILURE with cause value “PS Handover failure-others” and resumes the uplink data transfer.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 400 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

All instances are sent on the PACCH of the assigned PDCH.

Containing :Containing: System Info Type 1and System Info Type 3 of cell B.

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

7

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH. USF not assigned to the MS.

The following messages are sent on cell B.

8

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

Sent on PACCH assigned in step 7. USF assigned to the MS.

9

SS

Check that no data block is transmitted by the MS in the next radio radio block.

The following messages are sent 200 ms after step 9 on cell A.

10

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF allocated in PACKET UPLINK ASSIGNMENT from step 1 assigned to the MS.

11

MS -> SS

PACKET CELL CHANGE FAILURE

Cause:" PS Handover failure-others”

12

{Completion of uplink RLC data block transfer}

41.6.2 Intra SGSN PS Handover / Pre-synchronized cell case

41.6.2.1 Intra SGSN PS Handover / Pre-synchronized cell case / successful / RLC reset

41.6.2.1.1 Conformance requirements

The following synchronisation mechanisms are used for PS handover:

  • Non-synchronised.
  • Synchronised.
  • Pre-Synchronised.

The synchronised and pre-synchronised cases are shown in figures 23 and 25 and have different mechanisms for the provision of the timing advance that are described in 3GPP TS 45.010 [26].

NOTE: The pseudo-synchronised case is not supported by the PS handover feature.

In the case of pre-synchronised handover the MS may receive the timing advance information to use in uplink in the target cell in the PS Handover Command message (if no timing advance information is included, the mobile station uses a default timing advance in the target cell). In a pre-synchronised or synchronised handover, the Packet Physical information message is not sent in the target cell.

If the timing advance with the new cell calculated by the mobile station is not out of range, i.e. smaller than or equal to the maximum timing advance that can be coded as specified in 3GPP TS 44.004, or if the new cell does accept out of range timing advance as indicated in the PS HANDOVER COMMAND message, the mobile station acts on the message.

After having switched to the assigned channels, if the Handover Reference information is included within the PS HANDOVER COMMAND message the mobile station shall send four times the PS HANDOVER ACCESS message.

The mobile station activates the channels in sending and receiving mode. The MS may activate the channels in downlink while sending access bursts.

If the PS HANDOVER COMMAND indicates RLC reset for a TBF allocated in the new cell corresponding to a PFC receiving a PS handover, the target BSS shall initialize a new RLC entity to support that TBF. Otherwise, the TBF allocated in the new cell shall be supported using the same RLC entity used to support the TBF in the old cell corresponding to the same PFC (i.e. the RLC state machine is maintained across PS handover).

References

3GPP TS 43.129, subclasses 5.1.2 and 6.2.2

3GPP TS 44.060, subclasses 8.10.3.2; 8.10.4.1 and 8.10.4.4.2.

41.6.2.1.2 Test purposes

To verify that while in uplink acknowledged mode operation the MS performs successfully pre-Synchronised PS Handover from A/Gb to A/Gb and that the RLC is not maintained over PS handover.

41.6.2.1.3 Method of test

Initial Conditions

System Simulator:

2 cells A (RAI 1) and B (RAI 1), GPRS supported, NC 2 mode, PCCCH not present.

The RF level of cell A is –50 dBm and cell B – 60 dBm.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the assigned USF assigned to the MS. The MS sends a RLC radio block. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a minimum set of System Info Types in order to perform a A/Gb to A/Gb pre-synchronized PS Handover by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell B, indicating RLC reset and containing a handover reference. The MS moves to cell B sends PS HANDOVER ACCESS resets the RLC entity and resends the unacknowledged RLC data blocks. The MS completes the uplink data transfer.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 2000 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

Sent on the PACCH of the assigned PDCH.

Containing : System Info Type 1, System Info Type 3 and System Info Type 13.

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

7

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH . USF not assigned to the MS.

The following messages are received on cell B.

8

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

120 ms (T_GSM_delay) after step 7. USF assigned to the MS.

9

MS -> SS

PS HANDOVER ACCESS

As 4 access bursts. Check that handover reference is correct.

10

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

11

MS -> SS

PACKET UPLINK DUMMY CONTROL BLOCK or

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Repeat steps 10 and 11 for maximum of 100 ms or until UPLINK RLC DATA BLOCK is received.

Received on the assigned PDTCH.

(Data block may contain empty LLC PDU for Cell Update. In that case the SS shall accept Packet Resource Request from MS and respond with Packet Uplink Assignment.)

NOTE: The empty LLC PDU may be accompanied by another low priority RLC data block (with Packet Resource Request and Packet Uplink Assignment as required), in order to ensure that the radio resources are used efficiently.

Check that BSN = 0.

12

{Completion of uplink RLC data block transfer}

Specific Message Contents

PS HANDOVER COMMAND message in step 7:

As default message contents except

PS Handover Radio Resources IE

present

SI

10 Pre-synchronized

RLC_RESET

1

41.6.2.2 Intra SGSN PS Handover / Pre-synchronized cell case / Frequency parameters / successful

41.6.2.2.1 Conformance requirements

The following synchronisation mechanisms are used for PS handover:

  • Non-synchronised.
  • Synchronised.
  • Pre-Synchronised.

The synchronised and pre-synchronised cases are shown in figures 23 and 25 and have different mechanisms for the provision of the timing advance that are described in 3GPP TS 45.010 [26].

NOTE: The pseudo-synchronised case is not supported by the PS handover feature.

In the case of pre-synchronised handover the MS may receive the timing advance information to use in uplink in the target cell in the PS Handover Command message (if no timing advance information is included, the mobile station uses a default timing advance in the target cell). In a pre-synchronised or synchronised handover, the Packet Physical information message is not sent in the target cell.

If the timing advance with the new cell calculated by the mobile station is not out of range, i.e. smaller than or equal to the maximum timing advance that can be coded as specified in 3GPP TS 44.004, or if the new cell does accept out of range timing advance as indicated in the PS HANDOVER COMMAND message, the mobile station acts on the message.

After having switched to the assigned channels, if the Handover Reference information is included within the PS HANDOVER COMMAND message the mobile station shall send four times the PS HANDOVER ACCESS message.

The mobile station activates the channels in sending and receiving mode. The MS may activate the channels in downlink while sending access bursts.

References

3GPP TS 43.129, subclasses 5.1.2 and 6.2.2

3GPP TS 44.060, subclasses 8.10.3.2; 8.10.4.1 and 8.10.4.4.2.

41.6.2.2.2 Test purposes

To verify that while in uplink acknowledged mode operation the MS performs successfully pre-Synchronised PS Handover from A/Gb to A/Gb and applies frequency hopping settings on cell B correctly which are assigned by ‘Indirect Encoding’ and ‘Direct encoding 1’ method.

41.6.2.2.3 Method of test

Initial Conditions

System Simulator:

2 cells A (RAI 1) and B (RAI 1), GPRS supported, NC 2 mode, PCCCH not present.

The RF level of cell A is –50 dBm and cell B – 60 dBm.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the assigned USF assigned to the MS. The MS sends a RLC radio block. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a set of System Info messages in order to perform a A/Gb to A/Gb pre-synchronized PS Handover by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a hopping PDCH on cell B. The MS moves to cell B sends PS HANDOVER ACCESS and resends the unacknowledged RLC data blocks. The MS completes the uplink data transfer.

The procedure is performed for execution counter M=1 and 2 using different methods for assigning the hopping frequencies.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 2000 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

All instances are sent on the PACCH of the assigned PDCH.

Containing : System Info Type 1, System Info Type 3 and System Info Type 13 of cell B (see Specific Message Contents).

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

7

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH . USF not assigned to the MS.

The following messages are received on cell B.

8

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

120 ms (T_GSM_delay) after step 7. USF assigned to the MS.

9

MS -> SS

PS HANDOVER ACCESS

As 4 access bursts. Check that handover reference is correct.

10

MS -> SS

PACKET UPLINK DUMMY CONTROL BLOCK or

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Repeat steps 10 and 11 for maximum of 100 ms or until UPLINK RLC DATA BLOCK is received.

Received on the assigned PDTCH.

(Data block may contain empty LLC PDU for Cell Update. In that case the SS shall accept Packet Resource Request from MS and respond with Packet Uplink Assignment.)

NOTE: The empty LLC PDU may be accompanied by another low priority RLC data block (with Packet Resource Request and Packet Uplink Assignment as required), in order to ensure that the radio resources are used efficiently.

11

{Completion of uplink RLC data block transfer}

Specific Message Contents

SYSTEM INFORMATION TYPE 13 of cell B and included in PACKET NEIGHBOUR CELL DATA in step 5:

For M = 1:

As default message contents except

– GPRS Mobile Allocation

– HSN

1 Hopping sequence 1

– 0 <RFL number list>

not present

– 0

using MA BITMAP

– <MA_LENGTH>

000101 (for GSM 900)

000011 (for other bands)

– <MA_BITMAP>

000111 3 belonging (for GSM 900)

0111 3 belonging (for other bands)

PACKET SYSTEM INFORMATION TYPE 13 on PACCH of cell B:

{GPRS Mobile Allocation}

– HSN

1 Hopping sequence 1

– 0 <RFL number list>

not present

– 0

using MA BITMAP

– <MA_LENGTH>

000101 (for GSM 900)

000011 (for other bands)

– <MA_BITMAP>

000111 3 belonging (for GSM 900)

0111 3 belonging (for other bands)

For M = 2 default SI13 and PSI13 of cell B are used.

PS HANDOVER COMMAND message in step 7:

For M = 1:

As default message contents except

PS Handover Radio Resources IE

Present

SI

10 Pre-synchronized

1<Frequency Parameters>}

present

– TSC

‘101’, same as BCCH of cell B

– 01 (Indirect encoding)

Indirect encoding struct

– MAIO

5

– MA_NUMBER

14…GPRS mobile allocation received in SI13 message

– 0 <CHANGE_MARK_1>

not present

– 0 <CHANGE_MARK_2>

not present

For M = 2:

As default message contents except

PS Handover Radio Resources IE

Present

SI

10 Pre-synchronized

1<Frequency Parameters>}

present

– TSC

‘101’, same as BCCH of cell B

– 10 (Direct encoding 1)

Direct encoding 1 struct

– MAIO

5

– GPRS Mobile Allocation

– HSN

1 Hopping sequence 1

– 0 <RFL number list>

not present

– 0

using MA BITMAP

– <MA_LENGTH>

000101 (for GSM 900)

000011 (for other bands)

– <MA_BITMAP>

000111 3 belonging (for GSM 900)

0111 3 belonging (for other bands)

41.6.3 Intra SGSN PS Handover / Non synchronized cell case

41.6.3.1 Intra SGSN PS Handover / Non synchronized cell case / PS Handover Access (8-bit / 11-bit format) / successful

41.6.3.1.1 Conformance requirements

The following synchronisation mechanisms are used for PS handover:

– Non-synchronised.

– Synchronised.

– Pre-Synchronised.

The non-synchronised cases are shown in figures 22 and 24 and are characterised by the requirement for the MS to obtain a valid uplink timing advance before it can transmit normal bursts. The MS shall notify its presence in the target cell through the transmission of access bursts to the BSS, and the BSS shall respond with a valid timing advance which in turn enables the MS to send normal bursts in uplink.

After having switched to the assigned channels, the mobile station shall send four times the PS HANDOVER ACCESS message. The mobile station shall start timer T3216 at the start point of the timeslot in which the PS HANDOVER ACCESS message is sent the first time on the PACCH.

If the network requests the transmission of the PS HANDOVER ACCESS message it shall be sent with highest transmission priority using either the 8-bit or 11-bit access burst format on the PACCH associated with any uplink TBF allocated in the PS HANDOVER COMMAND message for which the mobile station detects an assigned USF value. Its content consists of the handover reference field. The burst format used shall be that specified by the ACCESS_BURST_TYPE in the system information for the target cell.

The mobile station then activates the channels in receiving mode.

Upon reception of the PS HANDOVER ACCESS message containing the expected Handover Reference value, once the network has the RF characteristics that are necessary, it sends a PACKET PHYSICAL INFORMATION message to the mobile station on the PACCH.

When the mobile station receives a PACKET PHYSICAL INFORMATION message, it stops timer T3216, stops sending access bursts and activates the channels in sending and receiving mode.

The MS sends uplink LLC PDUs, e.g. a Routing Area Update Request message or uplink user data packets to the SGSN immediately after receiving the Packet Physical Information message or, in a synchronised or pre-synchronised handover, immediately if the PS Handover Access message is not required to be sent (see Section 6.2).

References

3GPP TS 43.129, subclasses 6.2.2, 5.1.2.3

3GPP TS 44.060, subclasses 8.10.4.4.4.

41.6.3.1.2 Test purpose

To verify that while in uplink Acknowledged mode MS performs successfully Non-Synchronised PS Handover from A/Gb to A/Gb.

To verify that MS uses correct access burst format for the PS HANDOVER ACCESS message.

41.6.3.1.3 Method of test

Initial Conditions

System Simulator:

Two cells A (RAI1, SI13 indicates 8-bit access burst format) and Cell B (RAI 1, SI13 indicates 11-bit access burst format), NC2 mode, GPRS supported, PCCCH not present.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the assigned USF to the MS. The MS sends a RLC radio block. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a minimum set of System Info Types in order to perform a A/Gb to A/Gb Non-synchronized PS Handover to cell B by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell B and containing a handover reference. The MS moves to cell B and sends PS HANDOVER ACCESS in 11-bit access burst format in Cell B. The SS sends PACKET PHYSICAL INFORMATION to the MS.

Following handover to Cell B MS continues with the data uplink data transfer in Cell B. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a minimum set of System Info Types in order to perform a A/Gb to A/Gb Non-synchronized PS Handover to cell A by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell A and containing a handover reference. The MS moves to cell A and sends PS HANDOVER ACCESS in 8-bit access burst format in Cell A. The SS sends PACKET PHYSICAL INFORMATION to the MS.

Following handover to cell A MS continues with the data uplink data transfer in Cell A.

Maximum Duration of Test

10 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 2000 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

All instances are Sent on the PACCH of the assigned PDCH.

Containing: System Info Type 1, System Info Type 3 and System Info Type 13 of cell B.

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

7

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH. USF not assigned to the MS.

The following messages are received on cell B.

8

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

Send 120 ms (T_GSM_delay) after step 7. USF assigned to the MS.

9

MS -> SS

PS HANDOVER ACCESS

As 4 access bursts. Check that handover reference and access burst format (11-bit) is correct.

10

SS->MS

PACKET PHYSICAL INFORMATION

11

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

12

MS -> SS

PACKET UPLINK DUMMY CONTROL BLOCK or

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

Repeat steps 11 and 12 for maximum of 100 ms or until UPLINK RLC DATA BLOCK is received.

(Data block may contain empty LLC PDU for Cell Update. In that case the SS shall accept Packet Resource Request from MS and respond with Packet Uplink Assignment.)

13

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

14

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

15

Repeat step 13 and 14 in total of 30 times.

16

SS -> MS

PACKET NEIGHBOUR CELL DATA

All instances are Sent on the PACCH of the assigned PDCH.

Containing: System Info Type 1, System Info Type 3 and System Info Type 13 of cell A.

USF assigned to the MS.

17

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

18

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH. USF not assigned to the MS.

The following messages are received on cell A.

19

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

Send 120 ms (T_GSM_delay) after step 18. USF assigned to the MS.

20

MS -> SS

PS HANDOVER ACCESS

As 4 access bursts. Check that handover reference and access burst format (8-bit) is correct.

21

SS->MS

PACKET PHYSICAL INFORMATION

22

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

23

MS -> SS

PACKET UPLINK DUMMY CONTROL BLOCK or

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

Repeat steps 11 and 12 for maximum of 100 ms or until UPLINK RLC DATA BLOCK is received.

(Data block may contain empty LLC PDU for Cell Update. In that case the SS shall accept Packet Resource Request from MS and respond with Packet Uplink Assignment.)

24

{Completion of uplink RLC data block transfer}

Specific Message Contents

PS HANDOVER COMMAND message in step 7:

As default message contents except

default

PS Handover Radio Resources IE

present

SI

00 Non-synchronized

RLC_RESET

1

PACKET PHYSICAL INFORMATION message in step 10:

PAGE_MODE

default

Global TFI

TFI of mobile station uplink TBF

TIMING ADVANCE VALUE

30 bit periods

41.6.3.2 Intra SGSN PS Handover / Non synchronized cell case / Different RA / successful

41.6.3.2.1 Conformance requirements

The following synchronisation mechanisms are used for PS handover:

  • Non-synchronised.
  • Synchronised.
  • Pre-Synchronised.

The non-synchronised cases are shown in figures 22 and 24 and are characterised by the requirement for the MS to obtain a valid uplink timing advance before it can transmit normal bursts. The MS shall notify its presence in the target cell through the transmission of access bursts to the BSS, and the BSS shall respond with a valid timing advance which in turn enables the MS to send normal bursts in uplink.

After having switched to the assigned channels, the mobile station shall send four times the PS HANDOVER ACCESS message. The mobile station shall start timer T3216 at the start point of the timeslot in which the PS HANDOVER ACCESS message is sent the first time on the PACCH.

The mobile station then activates the channels in receiving mode.

Upon reception of the PS HANDOVER ACCESS message containing the expected Handover Reference value, once the network has the RF characteristics that are necessary, it sends a PACKET PHYSICAL INFORMATION message to the mobile station on the PACCH.

When the mobile station receives a PACKET PHYSICAL INFORMATION message, it stops timer T3216, stops sending access bursts and activates the channels in sending and receiving mode.

The MS sends uplink LLC PDUs, e.g. a Routing Area Update Request message or uplink user data packets to the SGSN immediately after receiving the Packet Physical Information message or, in a synchronised or pre-synchronised handover, immediately if the PS Handover Access message is not required to be sent (see Section 6.2).

References

3GPP TS 43.129, subclasses 6.2.2, 5.1.2.3

3GPP TS 44.060, subclasses 8.10.4.4.4.

41.6.3.2.2 Test purpose

To verify that while in uplink Acknowledged mode MS performs successfully Non-Synchronised PS Handover from A/Gb to A/Gb.

To verify that MS triggers Routing Area update procedure after receiving the Packet Physical Information and during this procedure data transfer continues.

41.6.3.2.3 Method of test

Initial Conditions

System Simulator:

Two cells A (RAI 1) and Cell B (RAI 2), NC2 mode, GPRS supported, PCCCH not present.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the assigned USF to the MS. The MS sends a RLC radio block. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a minimum set of System Info Types in order to perform a A/Gb to A/Gb Non-synchronized PS Handover by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell B and containing a handover reference. The MS moves to cell B sends PS HANDOVER ACCESS. The SS sends PACKET PHYSICAL INFORMATION to the MS.

Following handover to Cell B MS may send PACKET RESOURCE REQUEST to trigger the ROUTING AREA UPDATE procedure. The Routing area procedure is completed and the MS continues with the data uplink data transfer in Cell B.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 2000 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

All instances are Sent on the PACCH of the assigned PDCH.

Containing : System Info Type 1, System Info Type 3 and System Info Type 13 of cell B.

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding BSN and the TFI are correct.

7

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH. USF not assigned to the MS.

The following messages are received on cell B.

8

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

Send 120 ms (T_GSM_delay) after step 7. USF assigned to the MS.

9

MS -> SS

PS HANDOVER ACCESS

As 4 access bursts. Check that handover reference is correct.

10

SS->MS

PACKET PHYSICAL INFORMATION

11

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

12

MS -> SS

PACKET UPLINK DUMMY CONTROL BLOCK or

UPLINK RLC DATA BLOCK or

PACKET RESOURCE REQUEST or

ROUTING AREA UPDATE REQUEST or PACKET MEASUREMENT REPORT

Repeat steps 11 and 12 for maximum of 100 ms

or PACKET RESOURCE REQUEST is received on PACCH then the optional steps 13 to 16 are performed or ROUTING AREA UPDATE REQUEST

Note: MS may complete the ongoing LLC PDU started before PS handover in step 11 and step 12 or

Ensure that the MS completes the transfer of the ROUTING AREA UPDATE REQUEST message

13

Optional step

SS->MS

PACKET UPLINK ASSIGNMENT

Sent on the PACCH of the assigned PDCH. USF not assigned to the MS.

14

Optional step

SS->MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

15

Optional step

MS->SS

UPLINK RLC DATA BLOCK

(ROUTING AREA UPDATE REQUEST) or PACKET MEASUREMENT REPORT

Ensure that the MS completes the transfer of the ROUTING AREA UPDATE REQUEST message

16

Optional step

Repeat step 14 and 15 until the last block of the ROUTING AREA UPDATE REQUEST is received.

17

SS -> MS

PACKET UPLINK ACK/NACK

Sent on the PACCH of the PDCH assigned, acknowledge all received data, without setting FINAL_ACK_INDICATION.

18

SS -> MS

PACKET DOWNLINK ASSIGNMENT

Sent on PACCH of the PDCH assigned.

19

SS -> MS

DOWNLINK RLC DATA BLOCK

(ROUTING AREA UPDATE ACCEPT)

Transporting the ROUTING AREA UPDATE ACCEPT

Last RLC data block with valid RRBP field (polling).

20A

MS -> SS

PACKET DOWNLINK ACK/NACK

Including Channel Request Description.

21A

SS -> MS

PACKET UPLINK ASSIGNMENT

Sent on PACCH of the PDCH assigned. Continue with step 24.

20B

MS -> SS

PACKET DOWNLINK ACK/NACK

Not including Channel Request Description.

21B

SS->MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

22B

MS -> SS

UPLINK RLC DATA BLOCK or PACKET RESOURCE REQUEST

23 B Optional step

SS -> MS

PACKET UPLINK ASSIGNMENT

Step is performed if MS send PACKET RESOURCE REQUEST in step 22B.
Sent on PACCH of the PDCH assigned.

24

{Completion of uplink RLC data block transfer}

Specific Message Contents

PS HANDOVER COMMAND message in step 7:

As default message contents except

default

PS Handover Radio Resources IE

present

SI

00 Non-synchronized

RLC_RESET

1

PACKET PHYSICAL INFORMATION message in step 10:

PAGE_MODE

default

Global TFI

TFI of mobile station uplink TBF

TIMING ADVANCE VALUE

30 bit periods

41.6.3.3 Intra SGSN PS Handover / Non synchronized cell case / Abnormal Case / T3216 expiry

41.6.3.3.1 Conformance requirements

In case of initial access failure in the target cell, including the case where the MS fails to acquire time alignment information (for the unsynchronised network case), the MS is allowed to revert to the old cell. As is defined currently in 3GPP TS 44.060 [7], the MS shall return to the old cell and send a Packet Cell Change Failure message with the appropriate cause.

If the MS was in packet transfer mode (or MAC-shared state) before the attempted handover it will, when going back to the old cell, send a Packet Cell Change Failure message and resume TBFs which were ongoing in the old cell.

A mobile station operating in A/Gb mode shall consider the PS handover to A/Gb mode to have failed for the following reasons:

– Timer T3216 expires while in the new cell.

A mobile station operating in A/Gb mode when a PS handover to A/Gb mode fails shall proceed as follows:

– If timer T3216 expired it shall return to the cell on which the PS HANDOVER COMMAND message was received.

– Send a Packet Cell Change Failure message with the cause code set to "No response on target cell" if timer T3218 or T3216 expired, otherwise "PS Handover failure-others". The message shall be sent on PACCH .

– The transmission of a Packet Cell Change Failure message terminates the PS handover procedure in the mobile station and after the transmission of this message the mobile station is therefore allowed to request the establishment of additional uplink TBFs.

– After terminating the PS handover procedure the mobile station shall resume all uplink and downlink TBFs that were ongoing in the old cell prior to receiving the PS HANDOVER COMMAND message. Timers T3180 (uplink TBFs) and T3190 (downlink TBFs) corresponding to these TBFs shall be re-started.

– For each TBF that is resumed the corresponding RLC state machine shall reflect its state when the last RLC data block was transmitted for that TBF in the old cell (uplink TBFs) and the last RLC data block was received for that TBF in the old cell (downlink TBFs).

References

3GPP TS 43.129, subclasses 5.7.2.1

3GPP TS 44.060, subclasses 8.10.5.1

41.6.3.3.2 Test purposes

To verify that the MS upon PS handover failure due to T3216 expiry, returns to the old cell and sends a PACKET CELL CHANGE FAILURE message with cause “No response on target cell” and resumes the TBFs that were ongoing in the old cell.

41.6.3.3.3 Method of test

Initial Conditions

System Simulator:

2 cells A and B, GPRS supported, NC 2 mode, PCCCH not present.

The RF level of cell A is –50 dBm and cell B – 60 dBm.

Mobile Station:

The MS is GPRS attached on cell A, a P-TMSI allocated and test PDP context2 activated.

Specific PICS Statements

PIXIT Statements

Test Procedure

The MS is triggered to initiate packet uplink transfer 2000 octets in the RLC acknowledged mode on cell A. After a successful uplink PDCH assignment the SS sends PACKET DOWNLINK DUMMY indicating the USF assigned to the MS. The SS allows the MS to transfer about 30 RLC blocks.

The SS provides the MS a minimum set of System Info Types in order to perform a A/Gb to A/Gb non-synchronized PS Handover by sending them in PACKET NEIGHBOUR CELL DATA message.

The SS sends PS HANDOVER COMMAND to assign a PDCH on cell B.

MS will send 4 PS Handover Access messages. SS does not send Packet Physical information and

waits for timer T3216(1 s) expiry.

SS then assigns USF to the MS on the old cell A. MS send PACKET CELL CHANGE FAILURE with cause value “No response on target cell” and resumes the uplink data transfer.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

1

{Uplink dynamic allocation two phase access}

The following messages received on cell A.

n = 2000 octets in RLC acknowledged mode (Test PDP context2), without starting time,

USF_GRANULARITY = 1 block,

RLC_DATA_BLOCKS_GRANTED = open-end

TLLI_BLOCK_CHANNEL_CODING: cs1,

CHANNEL_CODING_COMMAND: cs1

2

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF assigned to the MS.

3

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH. Check that the coding and the TFI are correct.

4

Repeat step 2 and 3 in total of 30 times.

5

SS -> MS

PACKET NEIGHBOUR CELL DATA

USF assigned to the MS.

6

MS -> SS

UPLINK RLC DATA BLOCK or PACKET MEASUREMENT REPORT

Received on the assigned PDTCH.

7

Repeat step 5 and 6 until all instances are sent on the PACCH of the assigned PDCH.

Containing : System Info Type 1, System Info Type 3 and

System Info Type 13 of cell B.

8

SS -> MS

PS HANDOVER COMMAND

Sent on the PACCH of the assigned PDCH. USF not assigned to the MS.

9

The following messages are sent on cell B.

10

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

Sent on PACCH assigned in step 8. USF addressing the MS.

11

MS -> SS

PS HANDOVER ACCESS

As 4 access bursts. Check that handover reference is correct.

12

SS

SS does not send PACKET PHYSICAL INFORMATION.

SS waits until Timer T3216 expires (1 sec) + 0.1*T3216

13

SS -> MS

PACKET DOWNLINK DUMMY CONTROL BLOCK

USF allocated in PACKET UPLINK ASSIGNMENT from step 1 assigned to the MS.

14

MS -> SS

PACKET CELL CHANGE FAILURE

Cause:"No response on target cell”

15

SS<->MS

{ Uplink data transfer }

Macro – Completion of the 2kB of Data.

Specific Message Contents

PS HANDOVER COMMAND message in step 8:

As default message contents except

default

PS Handover Radio Resources IE

present

SI

00 Non-synchronized