Patent AU-2014401339-B2 (AU)
Title: Cell search and connection procedures in a cellular communication device
Inventor: LINDOFF BENGT
IPC: H04W48/16
Filed: 2014-12-01
Granted: 2016-12-22
Abstract: i z) iniernanonai Appicanon maius Kepon Received at International Bureau: 06 December 2014 (06.12.2014) Information valid as of: 17 May 2016 (17.05.2016) Report generated on: 10 October 2016 (10.10.2016) (10) Publication number: (43) Publication date: (26) Publication language: W02016/086956 09 June 2016 (09.06.2016) English (EN) (21) Application Number: (22) Filing Date: (25) Filing language: PCT/EP2014/076106 01 December 2014 (01.12.2014) English (EN) (51) International Patent Classification: H04W48/16 (2009.01); H04J 11/00 (2006.01); H04W 56/00 (2009.01) (71) Applicant(s): TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE/SE]; S-164 83 Stockholm (SE) (for all designated states) (72) Inventor(s): LINDOFF, Bengt; Oresundsvigen 5 S-237 35 Bjirred (SE) REIAL, Andres; Barometergatan 44 S-211 17 Malm6 (SE) (74) Agent(s): ANDERSSON, Ola; Ericsson AB Nya Vattentornet S-221 83 Lund (SE) (54) Title (EN): CELL SEARCH AND CONNECTION PROCEDURES IN A CELLULAR COMMUNICATION DEVICE (54) Title (FR): RECHERCHE DE CELLULES ET PROCEDURES DE CONNEXION DANS UN DISPOSITIF DE COMMUNICATION CELLULAIRE (57) Abstract: (EN): A cell-search method (90) for a cellular communication device (1) capable of communicating via a first radio-access technology, RAT, in a first frequency band (4), and via a second RAT in a second frequency band (7), which is in a higher frequency region than the first frequency band is disclosed. The method comprises performing (110) a first cell search in the first frequency band (4) in order to detect a first cell (2) of the first RAT. The method further comprises, if such a first cell (2) is detected, synchronizing (130) to the first cell (2), without registering to the first cell (2), determining (140) a reference frequency error estimate between a local reference frequency of the cellular communication device (1) and reference frequency of the first cell (2), and thereafter performing (150) a second cell search, based on the reference frequency error estimate, in the second frequency band (7) to detect a second cell (5) of the second RAT. A corresponding cellular communication device (1), computer program product, and computer-readable medium are also disclosed. (FR): La pr6sente invention concerne un proc6d6 de recherche de cellules (90) pour un dispositif de communication cellulaire (1) susceptible de communiquer par l'interm6diaire d'une premise technologies dacc~s radio, (RAT), dans une premise bande de fr6quence (4), et par l'interm6diaire d'une seconde RAT dans une seconde bande de fr6quence (7), qui se situe dans une plage de fr6quence plus 6lev6e que la premise bande de fr6quence. Le proc6d6 consiste A r6aliser (110) une premise recherche de cellules dans la premise bande de fr6quence (4) afin de d6tecter une premise cellule (2) de la premise RAT. Si une telle premise cellule (2) est d6tect6e, le proc6d6 consiste en outre A effectuer la synchronisation (130) avec la premise cellule (2), sans inscription aupr~s de celle-ci, A d6terminer (140) une estimation d'erreur de fr6quence de r6f6rence entre une fr6quence de r6f6rence locale du dispositif de communication cellulaire (1) et une fr6quence de r6f6rence de la premise cellule (2), puis A effectuer (150) une seconde recherche de cellule dans la seconde bande de fr6quence (7), en se basant sur l'estimation d'erreur de fr6quence de r6f6rence, pour d6tecter une seconde cellule (5) de la seconde RAT. L'invention porte 6galement sur un dispositif de communication cellulaire (1), sur un produit programme informatique et sur un support lisible par ordinateur correspondants. International search report: Received at International Bureau: 07 September 2015 (07.09.2015) [EP] International Report on Patentability (IPRP) Chapter II of the PCT: Not available (81) Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW European Patent Office (EPO): AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR African Intellectual Property Organization (OAPI): BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG African Regional Intellectual Property Organization (ARIPO): BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW Eurasian Patent Organization (EAPO) : AM, AZ, BY, KG, KZ, RU, TJ, TM