[LTE] DMCR (Deferred Measurement Control Reading)

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LTE Architecture and FEATURES

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 Ericsson 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.

Enhanced RRC release with redirect, Deferred Measurement Control Reading (DMCR) procedures (WCDMA)

The DMCR feature avoids reading specific SIBs with information that can be received at another occasion. The maximum time for reading system information without this indication is 1280ms.

in RNC Additional Nodes impacted: DMCR support

Additional Network Impact: DMCR to be rolled out in RNC

Benefit

faster call set-up times compared to the non enhanced solution.

Refer : Ericson Document