Patent SG-11201908395R-A (SG)
Title: Physical downlink control channel structure in low latency systems
Inventor: HOSSEINI SEYEDKIANOUSH
IPC: H04L5/00
Filed: 2018-04-18
Abstract: WO 18/ 195 197 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 25 October 2018 (25.10.2018) WIP0 I PCT Iiiimmomiolollmonolomomimmommommovoiml (10) International Publication Number WO 2018/195197 Al 115-13 405 1 I Determine CCE Stlucture - F - 410 Dctamine Level I 415 Del (51) International Patent Classification: H04L 5/00 (2006.01) (21) International Application Number: PCT/US2018/028167 (22) International Filing Date: 18 April 2018 (18.04.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/488,694 21 April 2017 (21.04.2017) US 15/955,520 17 April 2018 (17.04.2018) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (72) Inventors: HOSSEINI, Seyedkianoush; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). CHEN, Wanshi; 5775 Morehouse Drive, San Diego, California Published: 92121-1714 (US). PATEL, Shimman Arvind; 5775 More- house Drive, San Diego, California 92121-1714 (US). (74) Agent: ANDERSON, Thomas D.; Holland & Hart LLP, P.O. Box 11583, Salt Lake City, Utah 84147 (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). — with international search report (Art. 21(3)) (54) Title: PHYSICAL DOWNLINK CONTROL CHANNEL STRUCTURE IN LOW LATENCY SYSTEMS (57) : Methods, systems, and devices for wireless communication are described. A base station may transmit downlink control information (DCI) I 0 , -b to a user equipment (UE) in a control region of a shortened transmission time interval (sTTI) using an aggregation level or control channel element (CCE) structure, which may depend or vary based on characteristics of the sTTI. For instance, the CCE structure or the aggregation may vary based on a type of reference signal and/or on an sTTI index because the sTTI index may corre- spond to the number of resource elements available for DCI within the sTTI. The control region of the sTTI may include transmissions of cell-specific ref- erence signals (CRSs), demodulation reference signals (DMRSs), or channel state information reference signals (CSI-RSs). The number of resource ele- ments available for DCI within the control region may depend on whether such reference signals are present or on whether CRS-based or DMRS-based demodulation is employed. 1 Dete s r i : 420 Asgegation 4 _ \" 400 FIG. 4