Deferred Measurement Control Reading

[rosan]

Hi Guys,

Does this feature impact the UEs camped on 3G only?

Sent from my SM-N920I using Forum Fiend v1.3.3.

[marcengo]

This feature only works for UEs performing CSFB from LTE. This behavior is UE-dependent, based on Qualcomm`s patent, which doesn't mean other manufacturers couldn't use DMCR for normal UMTS operation (non-CSFB).

[electron]

This feature only works for UEs performing CSFB from LTE. This behavior is UE-dependent, based on Qualcomm`s patent, which doesn't mean other manufacturers couldn't use DMCR for normal UMTS operation (non-CSFB).


Hi,

Would you please specify the vendor also.


Cheers

[rosan]

NodeB vendor is Nokia and we include DMCR in SIB3 and a Samsung S3 apperantly skipping SIB 11 messages while testing in 3G only mode.

rosan

[marcengo]

Hi,

Would you please specify the vendor also.


Cheers

If you are mentioning infra-vendor (NOK/ERI/HUA), currently they all support DMCR and this is specified in the 3GPP. If you are mentioning UE manufacturers, I can only guarantee you that UEs with Qualcomm chipset support it, the others I don`t know.

Qualcomm`s patent: http://www.google.com/patents/US9237485


NodeB vendor is Nokia and we include DMCR in SIB3 and a Samsung S3 apperantly skipping SIB 11 messages while testing in 3G only mode.

rosan

Some UEs also perform SIB buffering for a determined amount of time, so even with or without DMCR active, the UE you are using may already be doing "SIB skipping" autonomously. Keep that in mind.

[rosan]

Thanks. I think you are referring that UE dont need to decode the SIB3 and 11 if it was staying in the same cell.

rosan

[BENRHOUMASALEM]

Hi rosan,

The main of this feature is to skip reading SIB11, SIB11bis, SIB 19 ... in the RACH procedure to go fast to the cell : improving call setup time in 3G and the time of CSFB.

BR,

[BENRHOUMASALEM]

Below the description of DMCR for Ericson :

Deferred Measurement Control Reading:-
This feature avoids reading SIBs with information that can be received at another occasion. Such information is included in SIB11 and 12. The SIB 11 includes measurement control and neighbouring cell list. As soon as a call is setup in E******* WCDMA, intra frequency measurements are started and the information in SIB11 information is retransmitted to the UE. The information in SIB12 regards traffic volume measurements and is only used in CELL_FACH, where SIB12 may also be read.
To tell the UE to skip reading SIB11 and 12 an indication is needed in SIB3, stating that this WCDMA network supports “Deferred Measurement Control Reading”. The maximum time for reading system information without this indication is 1280ms; omitting SIB11 and 12 would decrease this worst case time to 640ms.
As indicated in previous answer WCDMA support of this feature is planned for W12B (WCDMA RAN). No impact in other areas of the network.

[fahmi]

Dear All,

Any one tested DMCR ?

How to check if the DMCR is activated or not ?

BR,
Fahmi

[rosan]

Check it in SIB-3

rosan

[fahmi]

Dear Rosan,

Any screenshot for SIB-3 showing DMCR activated please :)

BR,


Check it in SIB-3

rosan

[marcengo]

Dear All,

Any one tested DMCR ?

How to check if the DMCR is activated or not ?

BR,
Fahmi

Yes, works fine.


Check it in SIB-3

rosan

SIB3 only indicates that the cell has it active, if the UE is actually using it, you need to check for deferredMeasurementControlReading on the RRCConnectionSetupComplete message.

[marcengo]

3GPP 25.331

2> if the variable DEFERRED_MEASUREMENT_STATUS is TRUE:
3> if System Information Block type 11 is scheduled on the BCCH and the UE has not read nor stored the IEs present in this System Information Block, or
3> if System Information Block type 11bis is scheduled on the BCCH and the UE has not read nor stored the IEs present in this System Information Block, or
3> if System Information Block type 12 is scheduled on the BCCH and the UE has not read nor stored the IEs present in this System Information Block:
4> include IE "Deferred measurement control reading".




Deferred measurement control reading
MD

Enumerated (TRUE)
Indicates the UE has not read SIB11, SIB11bis and SIB12, if available.
Default value is FALSE



In fact it can be found in many other messages, not only in the RRC Connection Request.

[rosan]

Dear Rosan,

Any screenshot for SIB-3 showing DMCR activated please :)

BR,

SIB-3
- . . . . . .sysInfoType3-v670ext
- . . . . . . .domainSpecificAccessRestrictionParametersForPLMNOfMIB
- . . . . . . . .cSDomainSpecificAccessRestriction:- noRestriction: null
- . . . . . . . .pSDomainSpecificAccessRestriction:- noRestriction: null
- . . . . . .v770NonCriticalExtension
- . . . . . . .sysInfoType3-v770ext
- . . . . . . . .deferredMeasurementControlReadingSupport
- . . . . . . . . .modeSpecificInfo:- fdd
- . . . . . . . . . . .intraFreqMeasQuantity-FDD: 0

RRC Connecton Complete
- . . . . . . . . . . . . .v770NonCriticalExtensions
- . . . . . . . . . . . . . .rrcConectionSetupComplete-v770ext
- . . . . . . . . . . . . . . .deferredMeasurementControlReading: 0

[fahmi]

SIB-3
- . . . . . .sysInfoType3-v670ext
- . . . . . . .domainSpecificAccessRestrictionParametersForPLMNOfMIB
- . . . . . . . .cSDomainSpecificAccessRestriction:- noRestriction: null
- . . . . . . . .pSDomainSpecificAccessRestriction:- noRestriction: null
- . . . . . .v770NonCriticalExtension
- . . . . . . .sysInfoType3-v770ext
- . . . . . . . .deferredMeasurementControlReadingSupport
- . . . . . . . . .modeSpecificInfo:- fdd
- . . . . . . . . . . .intraFreqMeasQuantity-FDD: 0

RRC Connecton Complete
- . . . . . . . . . . . . .v770NonCriticalExtensions
- . . . . . . . . . . . . . .rrcConectionSetupComplete-v770ext
- . . . . . . . . . . . . . . .deferredMeasurementControlReading: 0


Dear Rosan

deferredMeasurementControlReadingSupport under SIB-3 does this indicate that the UE supports the DMCR ?

deferredMeasurementControlReading: 0 -> what does mean the value 0 ? (DMCR is taking effect or not ?)

BR,
Fahmi

[rosan]

That means it is supported.

rosan

[marcengo]

Hi, Fahmi.

The deferredMeasurementControlReadingSupport in SIB3 indicates the NodeB is supporting DMCR.
The deferredMeasurementControlReading in UL RRC messages indicates if the UE actually is using DMCR (not reading SIBs).

If the UE reports deferredMeasurementControlReading=true, the NodeB will later on send the SIBs which the UE skipped, that`s why it is important for the UE to report if it using or not DMCR, regardless if the NodeB supports it.

8.1.1.6.3 System Information Block type 3

The UE should store all relevant IEs included in this system information block. The UE shall:
1> if in connected mode, and System Information Block 4 is indicated as used in the cell:
2> read and act on information sent in that block.
1> if IE "Deferred measurement control reading support" is present:
2> set variable DEFERRED_MEASUREMENT_STATUS to TRUE.
1> else:
2> set variable DEFERRED_MEASUREMENT_STATUS to FALSE.

8.1.3.6 Reception of an RRC CONNECTION SETUP message by the UE

1> submitan RRC CONNECTION SETUP COMPLETE message to the lower layers on the uplink DCCHafter successful state transition per subclause 8.6.3.3, with the contents setas specified below:

2> ifthe variable DEFERRED_MEASUREMENT_STATUS is TRUE:
3> ifSystem Information Block type 11 is scheduled on the BCCH and the UE has notread nor stored the IEs present in this System Information Block, or
3> ifSystem Information Block type 11bis is scheduled on the BCCH and the UE has notread nor stored the IEs present in this System Information Block, or
3> ifSystem Information Block type 12 is scheduled on the BCCH and the UE has not readnor stored the IEs present in this System Information Block:
4> includeIE "Deferred measurement control reading".
NOTE: Ifthe "RRC State indicator" is set to the value "CELL_FACH",the UE continues to read and store the IEs in System Information Block type 11,System Information Block type 11bis, and System Information Block type 12, iftransmitted, after submitting the RRC Connection Setup Complete message tolower layers (see 8.5.31).





Dear Rosan

deferredMeasurementControlReadingSupport under SIB-3 does this indicate that the UE supports the DMCR ?

deferredMeasurementControlReading: 0 -> what does mean the value 0 ? (DMCR is taking effect or not ?)

BR,
Fahmi