57 EGPRS Dual Transfer Mode
3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS
57.1 Reallocation of CS resources
57.1.1 Void
57.1.2 Void
57.1.3 Intra frequency reallocation of CS resources / DTM Assignment Command
57.1.3.1 Conformance requirements
In dual transfer mode an intracell change of channel can be requested by upper layers for changing the channel type, or decided by the RR sub layer, e.g. for an internal handover or for the reallocation of all the resources of the mobile station. The purpose is to modify completely the physical channel configuration of the mobile station without frequency redefinition or change in synchronization while staying in the same cell.
Upon receipt of the DTM ASSIGNMENT COMMAND message, the mobile station initiates a local end release of link layer connections, disconnects the physical channels, commands the switching to the assigned channel and initiates the establishment of lower layer connection (this includes the activation of the channel, their connection and the establishment of the main signalling link).
NOTE: This conformance requirement was taken from Rel-5 specifications, but it is also a requirement on R99 and Rel-4 MS.
References
3GPP TS 44.018, sub-clause 3.4.23.2
57.1.3.2 Test purpose
To verify that the MS can reallocate both the CS connection and PS resources to different timeslot(s) within the same frequency band, having received the DTM ASSIGNMENT COMMAND message.
57.1.3.3 Method of test
Initial Conditions
System Simulator:
1 cell, DTM supported.
Mobile Station:
The MS is in the active state (U10) of a call.
The MS is in GMM Ready state with a P-TMSI allocated and the PDP context 1 activated.
Specific PICS statements
–
PIXIT statements
–
Test Procedure
Once the MS is in DTM, the SS attempts to modify the resources of the MS. The SS allocates the MS a different timeslot configuration, in the same frequency band, on the current cell. The re-allocation of the MS resources is realised by the MS receiving a DTM ASSIGNMENT COMMAND from the SS. On receipt of the DTM ASSIGNMENT COMMAND message, the MS initiates a local end release of link layer connections, disconnects the physical channels. After the MS has switched to the assigned channel, the MS initiates the establishment of lower layer connection, the activation of the channel and the establishment of the main signalling link. The MS returns an ASSIGNMENT COMPLETE message on the new signalling link.
MS supporting DTM/EGPRS shall complete testing for k=1, and indicating support of single slot DTM/EGPRS shall complete testing for k=2.
Maximum Duration of Test
5 minutes
Expected Sequence
The test sequence is repeated for k = 1,2.
Step |
Direction |
Message |
Comments |
1 |
SS |
MS in state U10, on Timeslot N (chosen arbitrarily), utilising a default TCH of cell and either: k=1, Channel Type = TCH/F; or k=2, Channel Type = TCH/H. |
|
2 |
SS->MS |
PACKET ASSIGNMENT |
Assigning downlink resources on Timeslot N+1. |
3 |
SS<->MS |
{ Downlink data transfer } |
Macro – Transmitting 2.000 octet of Data |
4 |
SS->MS |
DTM ASSIGNMENT COMMAND |
This message is sent after approximately 1.000 octets have been successfully transmitted. See specific message contents. |
5 |
MS->SS |
ASSIGNMENT COMPLETE |
|
6 |
SS<->MS |
{ Downlink data transfer } |
Macro – Completion of the 2.000 octet transmission. |
7 |
SS |
Verify that the CS connection is still through connected on the new Timeslot. |
Specific Message Contents
DTM ASSIGNMENT COMMAND (Step 4):
k=1:
As default message contents as defined in section 40.2.4.28 except: |
|
Description of the CS Channel |
|
– Timeslot number |
(N + 4) MOD 8 |
– Channel Type |
TCH/F |
RR Packet Uplink Assignment IE |
Not included |
RR Packet Downlink Assignment IE |
|
– TIMESLOT_ALLOCATION |
((N + 4) 1)MOD 8 |
Additions for R99: |
|
EGPRS Window Size |
64 |
LINK_QUALITY_MEASUREMENT_MODE |
00 |
k=2:
As default message contents as defined in section 40.2.4.28 except: |
|
Description of the CS Channel |
|
– Timeslot number |
(N + 4) mod 8 |
– Channel Type |
TCH/H |
RR Packet Uplink Assignment IE |
Not included |
RR Packet Downlink Assignment IE |
|
– TIMESLOT_ALLOCATION |
(N + 4) MOD 8 |
Additions for R99: |
|
EGPRS Window Size |
64 |
LINK_QUALITY_MEASUREMENT_MODE |
00 |
57.1.4 Inter frequency reallocation of CS resources / DTM Assignment Command
57.1.4.1 Conformance requirements
In dual transfer mode an intracell change of channel can be requested by upper layers for changing the channel type, or decided by the RR sub layer, e.g. for an internal handover or for the reallocation of all the resources of the mobile station. The purpose is to modify completely the physical channel configuration of the mobile station without frequency redefinition or change in synchronization while staying in the same cell.
Upon receipt of the DTM ASSIGNMENT COMMAND message, the mobile station initiates a local end release of link layer connections, disconnects the physical channels, commands the switching to the assigned channel and initiates the establishment of lower layer connection (this includes the activation of the channel, their connection and the establishment of the main signalling link).
NOTE: This conformance requirement was taken from Rel-5 specifications, but it is also a requirement on R’99 and Rel-4 MS.
References
3GPP TS 44.018, sub-clause 3.4.23.2
57.1.4.2 Test purpose
To verify that the MS, can reallocate both the CS connection and PS resources to a different frequency band, having received the DTM ASSIGNMENT COMMAND message while in DTM.
57.1.4.3 Method of test
Initial Conditions
System Simulator:
1 cell, Cell A, with both TCH of cell activated and DTM supported. TCH2 allocated in a different frequency band and added to the Cell Channel Description in SI1.
Mobile Station:
The MS is in the active state (U10) of a call, on cell A, with a TMSI and P-TMSI allocated and the PDP context 1 activated but no allocated TBFs.
Specific PICS statements
–
PIXIT statements
–
Test Procedure
Once the MS is in DTM, the SS attempts to modify the resources of the MS. The MS is allocated a new timeslot, in a different frequency band. The re-allocation of the MS resources is realised by the MS receiving a DTM ASSIGNMENT COMMAND from the SS. On receipt of the DTM ASSIGNMENT COMMAND message, the MS initiates a local end release of link layer connections and disconnects the physical channels. After the MS has switched to the assigned channel, the MS initiates the establishment of lower layer connection, the activation of the channel and the establishment of the main signalling link. The MS returns an ASSIGNMENT COMPLETE message on the new signalling link and continues transmitting on the uplink TBF.
MS supporting DTM/EGPRS shall complete testing for k=1 MSs indicating support of single slot DTM/EGPRS shall complete testing for k=2.
Maximum Duration of Test
5 minutes
Expected Sequence
The test sequence is repeated for k = 1,2.
Step |
Direction |
Message |
Comments |
1 |
SS |
MS in state U10, on Timeslot N (chosen arbitrarily), utilising either: k=1, Channel Type = TCH/F; or k=2, Channel Type = TCH/H. |
|
2 |
MS |
Trigger the MS to initiate an uplink packet transfer containing 2.000 octets. |
|
3 |
MS->SS |
DTM REQUEST |
|
4 |
SS->MS |
PACKET ASSIGNMENT |
See specific message contents. |
5 |
SS<->MS |
{ Uplink data } |
Macro – Transmitting 2.000 octets of data. |
6 |
SS->MS |
DTM ASSIGNMENT COMMAND |
This message to be sent before the termination of the macro. The SS instructs the MS to utilise the first alternative TCH of Cell A in a different Band supported by the MS and see specific message contents for other changes to default message. |
7 |
MS->SS |
ASSIGNMENT COMPLETE |
|
8 |
SS<->MS |
{ Uplink data transfer } |
Macro – completion of 2.000 octets of data upload. |
9 |
SS |
Verify that the CS connection is still through connected on the new Timeslot. |
Specific Message Contents
PACKET ASSIGNMENT (Step 4):
k=1:
Information Element |
Value/remark |
As default message contents as defined in section 40.2.4.31 except: |
|
RR Packet Uplink Assignment IE |
|
– TIMESLOT_ALLOCATION |
(N 1) MOD 8 |
Additions for R99: |
|
EGPRS_MCS_MODE |
MCS-1 |
RESEGMENT |
0 Retransmitted RLC data blocks shall not be re-segmented |
EGPRS Window Size |
64 |
RR Packet Downlink Assignment IE |
Not included |
k=2:
Information Element |
Value/remark |
As default message contents as defined in section 40.2.4.31 except: |
|
RR Packet Uplink Assignment IE |
|
– TIMESLOT_ALLOCATION |
N |
Additions for R99: |
|
EGPRS_MCS_MODE |
MCS-1 |
RESEGMENT |
0 Retransmitted RLC data blocks shall not be re-segmented |
EGPRS Window Size |
64 |
RR Packet Downlink Assignment IE |
Not included |
DTM ASSIGNMENT COMMAND (Step 6):
As default message contents as defined in section 40.2.4.28 except: |
|
Description of the CS Channel |
|
– Timeslot number |
N |
– Channel Type |
TCH/F |
RR Packet Uplink Assignment IE |
|
– TIMESLOT_ALLOCATION |
(N 1) MOD 8 |
Additions for R99: |
|
EGPRS_MCS_MODE |
MCS-1 |
RESEGMENT |
0 Retransmitted RLC data blocks shall not be re-segmented |
EGPRS Window Size |
64 |
RR Packet Downlink Assignment IE |
Not included |
For GSM 850 and PCS 1900 only:
SYSTEM INFORMATION TYPE 1:
As default message contents except: |
|
SI 1 Rest Octets |
|
– Band Indicator |
H (ARFCN indicates 1900 band) |
SYSTEM INFORMATION TYPE 6:
As default message contents except: |
|
SI 6 Rest Octets |
|
– Band Indicator |
H (ARFCN indicates 1900 band) |
57.2 Release of CS resources
57.2.1 Network originating CS release
57.2.1.1 Conformance requirements
When the MS is operating in DTM and RR connection release is requested by the network, the radio resources allocated on a PDCH are released, the MS returns to the PCCCH or CCCH configuration, packet idle mode. The MS shall abort the RR connection by initiating a normal release of the main signalling link, perform a local end release of all other signalling links, disconnecting all traffic channels and abort all the packet resources.
References
3GPP TS 04.18/44.018, sub-clauses 3.4.13.1, 3.4.13.3
57.2.1.2 Test purpose
To verify that after the network releases the CS connection, the PS resources are correctly re-established
57.2.1.3 Method of test
Initial Conditions
System Simulator:
1 cell, DTM supported.
Mobile Station:
The MS is in the active state (U10) of a call.
The MS is GPRS attached with a P-TMSI allocated and the PDP context 1 activated.
Specific PICS statements
–
PIXIT statements
–
Test Procedure
An MS, in dedicated mode, is triggered to initiate uplink data transfer. The MS sends a DTM REQUEST message to the SS requesting uplink resources. The SS assigns the required resources and waits until approximately half the uplink data has been passed to the SS before instructing the MS to release the CS resources. The SS initiates the signalling required to release the channel by sending a DISCONNECT message to the MS. The MS responds to the DISCONNECT message with a RELEASE message, to which the SS responds with a RELEASE COMPLETE and then a CHANNEL RELEASE message. Once the resources have been cleared the MS requests the establishment of an uplink TBF and completes the data transmission.
MS supporting DTM/EGPRS shall complete testing for k=1 and MSs indicating support of single slot DTM/EGPRS shall additionally complete testing for k=2.
Maximum Duration of Test
5 minutes
Expected Sequence
Step |
Direction |
Message |
Comments |
1 |
SS |
MS in the active state (U10) of a call on Timeslot N. When: k=1, Channel Type=TCH/F; k=2, Channel Type=TCH/H. |
|
2 |
MS |
Trigger the MS to initiate an uplink packet transfer containing 10.000 octets. |
|
3 |
MS->SS |
DTM REQUEST |
|
4 |
SS->MS |
PACKET ASSIGNMENT |
See specific message contents |
5 |
MS<->SS |
{ Uplink data } |
Macro |
6 |
MS |
The SS is triggers the release of the CS connection when approximately 5.000 octets have been sent. |
|
7 |
SS->MS |
DISCONNECT |
|
8 |
MS->SS |
RELEASE |
|
9 |
SS->MS |
RELEASE COMPLETE |
|
10 |
SS->MS |
CHANNEL RELEASE |
|
11 |
MS<->SS |
{ Uplink dynamic allocation two phase access } |
Macro |
12 |
MS<->SS |
{ Completion of uplink RLC data block transfer } |
Macro – Completion of the 10.000 octets transmission. |
Specific Message Contents
PACKET ASSIGNMENT (Step 4):
k=1:
Information Element |
Value/remark |
As default message contents as defined in section 40.2.4.31 except: |
|
RR Packet Uplink Assignment IE |
|
– TIMESLOT_ALLOCATION |
(N 1) MOD 8 |
Additions for R99: |
|
EGPRS_MCS_MODE |
MCS-1 |
RESEGMENT |
0 Retransmitted RLC data blocks shall not be re-segmented |
EGPRS Window Size |
64 |
RR Packet Downlink Assignment IE |
Not included |
k=2:
Information Element |
Value/remark |
As default message contents as defined in section 40.2.4.31 except: |
|
RR Packet Uplink Assignment IE |
|
– TIMESLOT_ALLOCATION |
N |
Additions for R99: |
|
EGPRS_MCS_MODE |
MCS-1 |
RESEGMENT |
0 Retransmitted RLC data blocks shall not be re-segmented |
EGPRS Window Size |
64 |
RR Packet Downlink Assignment IE |
Not included |