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ETSI TR 144 901
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ETSI TR 144 901 Digital cellular telecommunications system (Phase 2+); External Network Assisted Cell Change (NACC) (3GPP TR 44.901 version 14.0.0 Release 14)
standard by European Telecommunications Standards Institute, 04/01/2017
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Full Description
ETSI TR 144 901 provides background information, motivations, concepts and requirements regarding an extendedNetwork Assisted Cell Change (NACC) feature for external cell change support. Cell change between GERAN andUTRAN cells is outside the scope of this report, although consideration has been taken in order to allow an easierextensibility to that case. The extension is based on the Release 4 version of the NACC feature where the mobile stationis only supported by the NACC when performing internal cell re-selection, i.e. within a BSC. The extension of thefeature is for GERAN just affecting BSS and for the core network the SGSN and signalling links between these networknodes. To support cell changes between GERAN and UTRAN, also the Um and the Uu interfaces are affected.The evolved Release 4 NACC proposal as described in this TR provides the basis for the detailed Stage 2 and stage 3specification work. The feature will be developed in a phased approach and a longer-term vision is presented in thereport.
The focus of the TR is to:Define the requirements on different nodesSpecify the requirements for the interfacesPropose a plan for the work item projectEvaluation of what does and does not need to be standardised