公开(公告)号：CA2604105A1

公开(公告)日：2006-10-19

申请号：CA2604105

申请日：2006-04-07

Applicant: INTERDIGITAL TECH CORP

Inventor： BALDWIN KEITH RICHARD ,  ZEIRA ELDAD ,  CHA INHYOK

IPC: H04Q7/00 ,  H04B1/00 ,  H04J99/00

Abstract: A method and apparatus for selecting an antenna mapping in multiple- in/multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measure d long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.

公开(公告)号：AU2013270503A1

公开(公告)日：2014-01-16

申请号：AU2013270503

申请日：2013-12-11

Applicant: INTERDIGITAL TECH CORP

Inventor： CHA INHYOK ,  ZEIRA ELDAD ,  BALDWIN KEITH RICHARD

IPC: H04B1/00

Abstract: A method and apparatus for selecting an antenna mapping in multiple-in /multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measure long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.

公开(公告)号：SG195526A1

公开(公告)日：2013-12-30

申请号：SG2013074588

申请日：2006-04-07

Applicant: INTERDIGITAL TECH CORP

Inventor： CHA INHYOK ,  ZEIRA ELDAD ,  BALDWIN KEITH RICHARD

IPC: H04J99/00

Abstract: METHOD AND APPARATUS FOR ANTENNA MAPPING SELECTION IN MIMO-OFDM WIRELESS NETWORKSA method and apparatus for selecting an antenna mapping in multiple in/multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measured long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.Fig. 2

公开(公告)号：MY149952A

公开(公告)日：2013-11-15

申请号：MYPI20090564

申请日：2005-09-07

Applicant: INTERDIGITAL TECH CORP

Inventor： MARINIER PAUL ,  CHANDRA ARTY ,  CHA INHYOK ,  ROY VINCENT

IPC: H04B1/38

Abstract: A METHOD FOR IMPLEMENTING A SMART ANTENNA IN ESTABLISHING ASSOCIATION BETWEEN A STATION (STA) AND AN ACCESS POINT (AP) IN A WIRELESS LOCAL AREA NETWORK BEGINS BY TRANSMITTING A BEACON FRAME(200) BY THE AP ON ONE ANTENNA BEAM. THE BEACON FRAME IS RECEIVED AT THE STA, WHICH MEASURES THE SIGNAL QUALITY OF THE BEACON FRAME. THE AP SWITCHES TO A DIFFERENT ANTENNA BEAM AND REPEATS THE METHOD UNTIL THE BEACON FRAME HAS BEEN TRANSMITTED ON ALL ANTENNA BEAMS. THE STA ASSOCIATES TO THE AP THAT TRANSMITS THE BEACON FRAME WITH THE HIGHEST SIGNAL QUALITY ON ONE OF ITS ANTENNA BEAMS. A SIMILAR METHOD MAY BE USED IN WHICH THE STA SENDS A PROBE REQUEST FRAME TO THE AP, WHICH THEN RESPONDS WITH PROBE RESPONSE FRAMES SENT ON MULTIPLE ANTENNA BEAMS.

公开(公告)号：AU2010200245B2

公开(公告)日：2013-09-12

申请号：AU2010200245

申请日：2010-01-22

Applicant: INTERDIGITAL TECH CORP

Inventor： CHA INHYOK ,  ZEIRA ELDAD ,  BALWIN KEITH RICHARD

IPC: H04B1/00 ,  H04J99/00

Abstract: A method and apparatus for selecting an antenna mapping in multiple-in /multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measure long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention. SELECT ANTENNA MAPPING 210 FROM CANDIDATE SET 230 NO0 SELECTED ANTENNA 230 MAPPING CALIBRATED CALIBRATE SELECTED ANTENNA YES MAPPING (REQUEST CALIBRATION, ESTIMATE CHANNEL, CALCULATE CALBRATION MATRI) 240 RECElVING. WVTRU YES )CHANGED ANTENNA 2 o 4? FlG.2 B EGIN DATA PACKET TRANSMISSION 310 316A 326A 32 0 312Ad 322A RF C~lN EAM EAM RF CHAIN 3125 SLEETOR . SELECTOR f322B RF CHAIN RF CHAIN , 31 4 --'- '324 CALIBRATION 316N 326M CALIBRATION

公开(公告)号：AU2009243503B2

公开(公告)日：2013-05-16

申请号：AU2009243503

申请日：2009-12-03

Applicant: INTERDIGITAL TECH CORP

Inventor： IACONO ANA LUCIA ,  CHANDRA ARTY ,  CHA INHYOK ,  MARINIER PAUL ,  ROY VINCENT

IPC: H01Q3/26 ,  H04B17/00

Abstract: A method for taking measurements with a smart antenna in a wireless communication system having a plurality of STAs begins by sending a measurement request from a first STA to a second STA. At least two measurement packets are transmitted from the second STA to the first STA. Each measurement packet is received at the first STA using a different antenna beam. The first STA performs measurements on each measurement packet and selects an antenna beam direction based on the measurement results. STAl SENDS MEASURE NT 402 REQUEST PACKET STA2 RECEIVES MEASUREMENT 404 REQUEST PACKET STA2 SENDS ACK 406 STA2 TRANSMITS MEASUREMENT 408 STAI MEASURES RSSI AND/OR SNR OF 410 418 MEASUREMENT 412 STA1 SELECTS TRANSMIT BEAM RANSMIT.ALL YES BASED ON PACKETS? MEASURED RSSI STAl CHANGES THE 414 RECEIVE BEAM END WAITSIFS 416 420

公开(公告)号：RU2428808C2

公开(公告)日：2011-09-10

申请号：RU2009132084

申请日：2008-01-25

Applicant: INTERDIGITAL TECH CORP

Inventor： YE CHUNXUAN ,  SHAH YOGENDRA C ,  CHA INHYOK

IPC: H04L29/06 ,  H04W8/08 ,  H04W12/02 ,  H04W12/08

Abstract: Изобретениеотноситсяк беспроводнойсвязи, аименнок способуи устройствудляверификациицелостностиинформациио местоположениии управлениядоступомс использованиеминформациио местоположении. Техническимрезультатомявляетсяповышениезащищенностиинформациио местоположении. Техническийрезультатдостигаетсятем, чтосогласнозаявленномуспособуформируютинформациюо местоположенииблокабеспроводнойпередачи/приема (WTRU) спомощьюобъектаопределенияместоположения; верифицируютцелостностьобъектаопределенияместоположенияс помощьюмодулядоверительнойобработкив WTRU; признаютинформациюо местоположении, сформированнуюс помощьюобъектаопределенияместоположения, еслицелостностьобъектаопределенияместоположенияверифицирована; исообщаюто целостностиинформациио местоположении. 2 н. и 13 з.п. ф-лы, 5 ил., 1 табл.

公开(公告)号：BRPI0710321A2

公开(公告)日：2011-08-09

申请号：BRPI0710321

申请日：2007-05-04

Applicant: INTERDIGITAL TECH CORP

Inventor： CHA INHYOK ,  SHAH YOGENDRA C ,  SINGHAL AMIT X

IPC: H04L29/06 ,  H04L12/22

Abstract: The present invention discloses several methods to strengthen the integrity of entities, messages, and processing related to content distribution as defined by the Open Mobile Alliance (OMA) Digital Rights Management (DRM). The methods use techniques related to the Trusted Computing Group (TCG) specifications. A first embodiment uses TCG techniques to verify platform and DRM software integrity or trustworthiness, both with and without modifications to the DRM rights object acquisition protocol (ROAP) and DRM content format specifications. A second embodiment uses TCG techniques to strengthen the integrity of ROAP messages, constituent information, and processing without changing the existing ROAP protocol. A third embodiment uses TCG techniques to strengthen the integrity of the ROAP messages, information, and processing with some changes to the existing ROAP protocol.

公开(公告)号：HK1136412A1

公开(公告)日：2010-06-25

申请号：HK10102873

申请日：2010-03-18

Applicant: INTERDIGITAL TECH CORP

Inventor： CHA INHYOK ,  SHAH YOGENDRA C

IPC: H04L20060101

Abstract: The present invention discloses several methods to strengthen the integrity of entities, messages, and processing related to content distribution as defined by the Open Mobile Alliance (OMA) Digital Rights Management (DRM). The methods use techniques related to the Trusted Computing Group (TCG) specifications. A first embodiment uses TCG techniques to verify platform and DRM software integrity or trustworthiness, both with and without modifications to the DRM rights object acquisition protocol (ROAP) and DRM content format specifications. A second embodiment uses TCG techniques to strengthen the integrity of ROAP messages, constituent information, and processing without changing the existing ROAP protocol. A third embodiment uses TCG techniques to strengthen the integrity of the ROAP messages, information, and processing with some changes to the existing ROAP protocol.

公开(公告)号：AT451784T

公开(公告)日：2009-12-15

申请号：AT05758685

申请日：2005-06-06

Applicant: INTERDIGITAL TECH CORP

Inventor： IACONO ANA LUCIA ,  CHANDRA ARTY ,  STEINBACH DANIEL P ,  CHA INHYOK ,  OTTO JAMES C ,  JOHNSON KEVIN P ,  GUTOWSKI STANLEY ,  LIU KAI ,  CUFFARO ANGELO ,  STERN-BERKOWITZ JANET

IPC: H04M1/00 ,  H04B1/06 ,  H04B1/10 ,  H04B15/00 ,  H04W16/24

Abstract: An access point operates in an 802.11 wireless communication network communicating with a client station, and includes a smart antenna for generating directional antenna beams and an omni-directional antenna beam. An antenna steering algorithm scans the directional antenna beams and the omni-directional antenna beam for receiving signals from the client station. The signals received via each scanned antenna beam are measured, and one of the antenna beams is selected based upon the measuring for communicating with the client station. The selected antenna beam is preferably a directional antenna beam. Once the directional antenna beam has been selected, there are several usage rules for exchanging data with the client station. The usage rules are directed to an active state of the access point, which includes a data transmission mode and a data reception mode.