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1. (WO2013111104) APPARATUS, METHOD AND COMPUTER PROGRAM FOR DISCOVERY SIGNALLING

Pub. No.:    WO/2013/111104    International Application No.:    PCT/IB2013/050654
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Sat Jan 26 00:59:59 CET 2013
IPC: H04W 8/00
Applicants: BROADCOM CORPORATION
HAKOLA, Sami-Jukka
TURTINEN, Samuli
PANTELIDOU, Anna
KOSKELA, Timo
Inventors: HAKOLA, Sami-Jukka
TURTINEN, Samuli
PANTELIDOU, Anna
KOSKELA, Timo
Title: APPARATUS, METHOD AND COMPUTER PROGRAM FOR DISCOVERY SIGNALLING
Abstract:
A first device receives a device-to-device D2D discovery signal which indicates that a second device which sent it does not have a cellular connection and/or is requesting relay to a network broader than a D2D network. In response, the first device engages in a search to find a cellular access node and reports its search results via D2D signalling. In non-limiting embodiments the indication can be explicit or may be implicit in the signal coding; the discovery signals of all devices are sent in periodic discovery signal intervals (204A-F) and any indication in a first discovery signal interval (204C) that a device needs a cellular connection triggers a common search by all the D2D devices in a second common search interval (208D) which is previous to the next discovery signal interval (204D) after the first (204C). The search results are reported in that next discovery signal interval (204D).