US 12,081,466 B2
Telecommunications apparatus and method for searching a predefined signature sequence
Yuichi Morioka, Berkshire (GB)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Appl. No. 14/389,809
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
PCT Filed Apr. 10, 2013, PCT No. PCT/GB2013/050914
§ 371(c)(1), (2) Date Oct. 1, 2014,
PCT Pub. No. WO2013/153376, PCT Pub. Date Oct. 17, 2013.
Claims priority of application No. 1206344 (GB), filed on Apr. 11, 2012.
Prior Publication US 2015/0071205 A1, Mar. 12, 2015
Int. Cl. H04L 5/00 (2006.01); H04W 52/02 (2009.01); H04W 76/28 (2018.01)
CPC H04L 5/003 (2013.01) [H04L 5/0078 (2013.01); H04W 52/0209 (2013.01); H04W 76/28 (2018.02); Y02D 30/70 (2020.08)] 18 Claims
OG exemplary drawing
 
1. A terminal device for communicating with a base station in a wireless telecommunications system, the terminal device comprising:
circuitry configured to:
receive a radio frame transmitted by the base station in a non-synchronous manner in which the terminal device is not synchronized to a radio frame structure transmitted by the base station, the radio frame having a packet inserted by the base station outside of a control region including a physical downlink control channel (PDCCH) of the radio frame, the packet including a predefined signature sequence, a header portion and a payload portion, the header portion including an indication of an identity of an intended recipient terminal device, wherein the identity of the intended recipient terminal device comprises an identifier of a group of devices specific to a class of Machine Type Communication (MTC) terminal devices including the intended recipient terminal device, and the payload portion including data specific to the intended recipient terminal device;
search the radio frame for the predefined signature sequence only during time periods determined in accordance with a predefined timing schedule;
detect the predefined signature sequence within the radio frame; and
in response to detection of the predefined signature sequence within the radio frame:
extract the data from the payload portion included in the packet in the radio frame in a case that the indication indicates that the terminal device is the intended recipient terminal device; and
continue to search the radio frame for other occurrences of the predefined signature sequence in a case that the indication indicates that the terminal device is not the intended recipient terminal device,
wherein in the case that the indication indicates that the terminal device is not the intended recipient terminal device, the circuitry continues to search the radio frame for other occurrences of the predefined signature sequence in a remainder of a wake period according to the predefined timing schedule before returning to a sleep mode.