Draft report ran wg4

R4-021426 LS on the key concepts and parameters for BER/BLER Statistical Approach (UE conformance testing) (TSGT WG1 RF, T1R020310)

T WG1/RF informs RAN WG4 on the approach adopted for BER/BLER tests. No actions are required.

Moray Rumney (Agilent) presented this LS and asked the BS testing experts to look at the paper and discuss it together later.

Decision: The LS is noted

R4-021625 LS on application of Test Tolerances to RRM tests (TSG T WG1 RF SWG, T1R020352)

The LS highlights the impossibility to meet RAN WG4 requirements in the CELL_FACH reselection text when applying the test tolerances, and asks WG4 to study the issue and answer without delay.

Nadege Noisette (Orange) clarified that the main issue in T1RF is that when applying test tolerances with WG4 guidelines in the CELL_FACH cell-re-selection test case, the UE under test could not see any interfering cells because their CPICH_Ec/Io felt down to –29dB while the min reporting range is –24dB. This issue impacts the cell re-selection delay that is tested here. Orange had proposed at T1RF the proposition in table 2 which wasn't agreed. Finally it was suggested in T1/RF either to change the test requirement, and for instance considered that the level of the interfering cell also changes while the UE is moving, or not to apply any test tolerances.

Moray Rumney (Agilent) pointed that there actually two issues here. First, there is no common understanding of the requirements of 25.133 when writing the test, setting the test scenario and assuming perfect measurement equipment. And second, the tolerances should be discussed. Sari Korpela (Nokia) noted that the discussion on the test scenario shouldn't be reopened now, T1 has been working on this basis for a while. Moray apologized for raising the discussion again, but noted that the test scenario should try to emulate real network conditions. Sari noted that the objective of the test scenario is to test terminals, not networks.

It seems clear that further discussion is necessary, a response to T1 will be drafted in R4-021628

Decision: The LS is noted