EP 1334574 A1 20030813 - METHOD AND APPARATUS TO SYNCHRONIZE MOBILE RADIOS
Title (en)
METHOD AND APPARATUS TO SYNCHRONIZE MOBILE RADIOS
Title (de)
VERFAHREN UND GERÄT ZUR SYNCHRONISIERUNG VON MOBILFUNKGERÄTEN
Title (fr)
PROCEDE ET APPAREIL DE SYNCHRONISATION DE RADIOS MOBILES
Publication
Application
Priority
- EP 0112583 W 20011029
- GB 0027062 A 20001106
Abstract (en)
[origin: WO0237714A1] A mobile radio (2) is adapted for direct two-way peer-to-peer radio communication with one or more other portable radios (4,6). The radio (2) may be a PMR radio, a Bluetooth radio, a 3G or 4G radio, or another radio communicating on an ad-hoc basis.The radio (2) comprises means (20) for entering into and awakening from a sleep mode, and means (20, 22, 24,26) for generating and transmitting synchronisation signals in a sleep mode. The synchronisation signals are received by one or more other radios (4,6) whereby the radios may become synchronised. When synchronised, the radio (2) may vary the mark: space ratio of its receive period, and may vary the frequency with which it transmits synchronisation signals. The variation may be dependent on the rate at which the radio (2) receives synchronisation signals from other radios (4,6).
IPC 1-7
IPC 8 full level
H04B 7/26 (2006.01); H04L 12/56 (2006.01)
CPC (source: EP)
H04B 7/2678 (2013.01); H04W 56/00 (2013.01); H04W 52/0219 (2013.01); H04W 74/04 (2013.01); H04W 84/18 (2013.01); Y02D 30/70 (2020.08)
Citation (search report)
See references of WO 0237714A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0237714 A1 20020510; AU 1906702 A 20020515; EP 1334574 A1 20030813; GB 0027062 D0 20001220; GB 2369267 A 20020522; GB 2369267 B 20021218
DOCDB simple family (application)
EP 0112583 W 20011029; AU 1906702 A 20011029; EP 01993072 A 20011029; GB 0027062 A 20001106