[LTE] RAN Information Management (RIM)

Enhanced RRC release with redirect, automatic system info exchange with RIM (GSM & WCDMA)

The standardized RIM procedures allow the transfer of SI from GSM or WCDMA to LTE. This requires additional impact on the total network. RIM needs to be rolled-out in the source and target RAN as well as for SGSN and MME. SGSN and MME will be needed to route the RIM container to the correct target node.

  

Additional Nodes impacted

RIM support in BSC/RNC, eNB, SGSN and MME

Additional Network Impact

RIM to be rolled out in RAN and PCN

Benefit

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

E2e Functionality available in Q2 2012. On top of basic CSFB, RIM support in GSM, WCDMA and LTE radio is planned for:  G12A (GSM Radio), W12B (WCDMA Radio), L12B (LTE Radio). 

RIM support in MME-SGSN is already available from MME-SGSN 2011B