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1. (WO2018202751) TELECOMMUNICATIONS APPARATUS AND METHODS TO TRANSMIT WAKE-UP SIGNAL COMPRISING SYNCHRONISATION SIGNALLING

Pub. No.:    WO/2018/202751    International Application No.:    PCT/EP2018/061301
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Fri May 04 01:59:59 CEST 2018
IPC: H04W 68/02
H04W 52/02
Applicants: SONY CORPORATION
SONY MOBILE COMMUNICATIONS, INC.
SONY EUROPE LIMITED
Inventors: WONG, Shin Horng
BEALE, Martin Warwick
MARTIN, Brian Alexander
PRIYANTO, Basuki
MAZLOUM, Nafiseh
Title: TELECOMMUNICATIONS APPARATUS AND METHODS TO TRANSMIT WAKE-UP SIGNAL COMPRISING SYNCHRONISATION SIGNALLING
Abstract:
A method of operating a network access node in a wireless telecommunications system comprising the network access node and a terminal device, wherein the method comprises: establishing that a downlink message, e.g. a paging message, for the terminal device to decode is going to be transmitted by the network access node; and transmitting wake-up signalling to the terminal device in advance of transmitting the downlink message to provide the terminal device with an indication the downlink message for the terminal device is going to be transmitted, wherein the wake-up signalling comprises an indication of an amount of synchronisation signalling for use by the terminal device to achieve radio synchronisation with the network access node, wherein the amount of synchronisation signalling depends on an amount of time elapsed since the terminal device was previously radio synchronised to the network access node.