Patent SG-11201901241R-A (SG)
Title: Handling resumption of transmissions and lbt performance in 3gpp multi-carrier elaa, license-assisted access
Inventor: YERRAMALLI SRINIVAS
IPC: H04W74/08
Filed: 2017-09-21
Abstract: aW O 20 18/0577 20 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 29 March 2018 (29.03.2018) WIP0 I PCT onion °nolo olmoomomi oloilowom (10) International Publication Number WO 2018/057720 Al (51) International Patent Classification: H04W 74/08 (2009.01) (21) International Application Number: PCT/US2017/052693 (22) International Filing Date: 21 September 2017 (21.09.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/398,750 23 September 2016 (23.09.2016) US 15/710,603 20 September 2017 (20.09.2017) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (72) Inventors: YERRAMALLI, Srinivas; Qualcomm Incor- porated, ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). GAAL, Peter; Qualcomm Incorporated, ATTN: Inter- national IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (74) Agent: VASQUEZ, Juan; Norton Rose Fulbright US LLP, 2200 Ross Avenue, Suite 3600, Dallas, Texas 75201-7932 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): 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, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, 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. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (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), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) (54) Title: HANDLING RESUMPTION OF TRANSMISSIONS AND LBT PERFORMANCE IN 3GPP MULTI-CARRIER ELAA, LICENSE-ASSISTED ACCESS SCell 1 Cat 4 D-P U U U U 105b SCell 2 105c 25 PS D-P UE1 UE1 UE2 UE2 904 r FIG. 9C 905 25ps LBT (57) : Handling uplink transmissions by UEs in unlicensed carrier components, in the context of 3GPP eLAA, enhanced license assisted access, and in particular, the configuration by the eNodeB of multi-carrier LBT, Listen Before Transmit, is discussed. The eNodeB signals together with the Uplink grant the LBT procedure to be used before transmitting in uplink, either a short, Category 2 LBT procedure, or else a longer, category 4 LBT procedure. The eNodeB signals, for a particular carrier component, the same LBT procedure it has used itself to sense and then securing the carrier. Also, when pauses occur during the uplink transmission on contention-based shared channels involved in eLAA communications, various procedures may be used to restart transmissions on the contention-based shared channels on the uplink when the original channel occupancy was reserved by a serving base station.