2014/01 57 p.
Many of the new RF features introduced and studied for RAN4 specifications are not RAT-specific, but often concern
UTRA, E-UTRA and also multi-RAT specifications including GSM/EDGE. Examples are Carrier Aggregation, noncontiguous spectrum operation, multiband capability, AAS, etc. This means that almost identical RF features are often
implemented in different RF specifications, within the same or different work items. This duplication not only creates
additional work and unnecessary discussions on how to implement new RF features, but in addition often creates
unmotivated differences between the specifications and even misalignment and conflicts between the RF requirements
across the specifications. The problems will be further accentuated as more features are added and the specifications
become more complex. There is a need to study whether the problems can be avoided for future specification release.
The study item objective is to investigate the feasibility of introducing a new BS specification structure, in order to
avoid duplicate specification work for new RF features (in case of identical features among different RATs) and to
avoid future discussions regarding how to implement the new features in single-RAT and/or multi-RAT specifications.
For the new possible specification structures, the following areas should be investigated, considering that no change of
existing requirements as a consequence of the new possible BS specification structure is assumed:
How future RF features can be incorporated across all RATs, with reduced effort and risk of specification
conflicts, considering the possible differences in requirements among different RATs
How to declare conformance for BS in the new specification structure
Feasibility of compliance of selected future RF feature(s) by legacy BS that conforms to specifications of
How to accommodate regulatory references to the new BS specification structure for single-RAT and multi-RAT
How to guarantee that a BS compliant to the new BS specification structure, for a requirement that is taken from
the legacy structure, will comply to that requirement for each applicable RAT as specified in the legacy structure
How to migrate the requirements in the present BS specification structure (including performance requirements)
into a new specification structure
full Table of Contents for TR 37.810 Word version: 12.2.0