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1. (WO2018084800) ENHANCEMENTS TO MOBILITY REFERENCE SIGNALS FOR RADIO LINK MONITORING IN A BEAM-BASED SYSTEM

Pub. No.:    WO/2018/084800    International Application No.:    PCT/SE2017/051102
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Sat Nov 04 00:59:59 CET 2017
IPC: H04W 72/08
H04W 72/04
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: DA SILVA, Icaro L. J.
FAN, Rui
TIDESTAV, Claes
RAMACHANDRA, Pradeepa
UGURLU, Umut
Title: ENHANCEMENTS TO MOBILITY REFERENCE SIGNALS FOR RADIO LINK MONITORING IN A BEAM-BASED SYSTEM
Abstract:
An access node transmits, in a downlink signal having a series of subframes, a beam-formed reference signal in subframes, where the beam-formed reference signals are transmitted in fewer than all of the subframes of the downlink signal. A first subset includes beam-formed reference signals corresponding to a first frequency or first localized range of frequencies, and a second subset includes beam-formed reference signals corresponding to a second frequency or second localized range of frequencies. The second frequency or second localized range of frequencies is spaced apart from and differing from the first frequency or first localized range of frequencies. A user equipment, UE, receives, in the downlink signal, the beam-formed reference signal in each of a plurality of subframes. The UE performs mobility management measurements using at least the first subset of the received beam- formed reference signals and performs RLM using the second subset of the received beam-formed reference signals.