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1. (WO2018028969) COMMUNICATIONS DEVICES, INFRASTRUCTURE EQUIPMENT AND METHODS

Pub. No.:    WO/2018/028969    International Application No.:    PCT/EP2017/068401
Publication Date: Fri Feb 16 00:59:59 CET 2018 International Filing Date: Fri Jul 21 01:59:59 CEST 2017
IPC: H04W 36/00
H04W 72/04
H04W 76/02
Applicants: SONY CORPORATION
SONY EUROPE LIMITED
Inventors: MARTIN, Brian Alexander
WEI, Yuxin
WAKABAYASHI, Hideji
TSUDA, Shinichiro
Title: COMMUNICATIONS DEVICES, INFRASTRUCTURE EQUIPMENT AND METHODS
Abstract:
Methods of communicating in a wireless telecommunications system comprising a communications device, a master cell group comprising one or more infrastructure equipment of a first type and a secondary cell group comprising one or more infrastructure equipment of a second type, the communications device being in a coverage area of one of the infrastructure equipment of the first type and a coverage area of at least one of the infrastructure equipment of the second type, wherein the communications device is configured to transmit signals to and receive signals from the infrastructure equipment of the first type in accordance with a first communications protocol and to transmit signals to and receive signals from the at least one infrastructure equipment of the second type in accordance with a second communications protocol, the second communications protocol being different to the first communications protocol. A method according to a first example embodiment of the present disclosure comprises establishing a measurement of radio conditions associated with a first communications path between the communications device and the infrastructure equipment of the first type, determining that the first communications path is not appropriate for use by the communications device, transmitting a failure message from the communications device to one of the infrastructure equipment of the second type via a second communications path, the failure message providing information regarding the determination that the first communications path is not appropriate for use by the communications device, receiving at the communications device a signal comprising a reconfiguration message from the one of the infrastructure equipment of the second type via the second communications path, and establishing, using the reconfiguration message, signals to be transmitted by the communications device and signals to be received by the communications device.