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1. (WO2018197092) COMMUNICATIONS DEVICE, INFRASTRUCTURE EQUIPMENT, WIRELESS COMMUNICATIONS NETWORK AND METHODS

Pub. No.:    WO/2018/197092    International Application No.:    PCT/EP2018/055921
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Mar 10 00:59:59 CET 2018
IPC: H04W 24/10
H04W 36/30
Applicants: SONY CORPORATION
SONY EUROPE LIMITED
Inventors: MARTIN, Brian Alexander
WONG, Shin Horng
SHARMA, Vivek
BEALE, Martin Warwick
Title: COMMUNICATIONS DEVICE, INFRASTRUCTURE EQUIPMENT, WIRELESS COMMUNICATIONS NETWORK AND METHODS
Abstract:
A method of performing cell reselection by a wireless communications device comprises measuring a signal strength of radio signals received from a serving cell, determining whether the signal strength of the signals received from the serving cell is lower than a first predetermined signal strength threshold, if the signal strength is lower than the first predetermined signal strength threshold measuring a signal strength of a neighbour cell operating on the same frequency as the serving cell to generate signal strength measurements at a first rate, and in accordance with the signal strength measurements of the neighbour cell generated at the first rate determining whether to reselect to the neighbour cell. In accordance with the present technique, if the signal strength of the signals received from the serving cell is greater than the first predetermined signal strength threshold and the radio signals received from the serving cell satisfy one or more predetermined conditions based on at least one of the measured signal strength of the signals received from the serving cell and a measured signal quality of the signals received from the serving cell, measuring the signal strength of the radio signals received from the neighbour cell to generate signal strength measurements at a second rate, and in accordance with the signal strength measurements generated at the second rate of the neighbour cell determining whether to reselect to the neighbour cell. As a result a communications device can adapt a rate of measuring signal strength measurements of a neighbouring cell in accordance with as strength of signals received from a serving cell.