Draft report ran wg4

5.7.2 Cell Identification

R4-021641 Report of the cell identification evening session (NEC)

Tdocs R4-021408, R4-021409, R4-021579, R4-021580 and R4-021461 were shortly presented and discussed during this session.

The meeting led to the following conclusion:

1) it was agreed by the participants that no problem had been identified by simulations so far on the intra-frequency cell identification

2) there was no consensus on the way of adding a general requirement limitation on transmission gap patterns (e.g. minimum gap density ) into TS 25.133.

3) it was also agreed that the constraints to configure parallel transmission gap patterns for inter-RAT measurements had to be compliant with any potential transmission gap pattern limitation

The proposed way forward is :

1) to agree on simulation assumptions as well as methodology

2) to agree on a way forward for the introduction on transmission gap pattern limitation (e.g. the proposal in Tdoc R4-011409)
After presentation, it was extensively discussed whether there is a fundamental performance issue for inter-frequency measurements with compressed mode. Siemens and NEC stressed that identification requirements can be met in certain tuning of parameters only. Nokia and Ericsson replied that typical scenarios are still to be discussed by taking into account realistic deployment scenario from the network side, and that there are some risks excluding flexibility at this stage. Nokia also commented that they do not see need for presenting the simulation results of UE performance. They recognised that removal of some unlikely configurations has to be considered.