Patent SG-11201808492X-A (SG)
Title: Beam and symbol selection to transmit rach
Inventor: ISLAM MUHAMMAD NAZMUL
IPC: H04W52/50
Filed: 2017-05-01
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property 1111111111111111111111111111111111111111111111111111111111111111111111111111111111 Organization International Bureau (10) International Publication Number (43) International Publication Date .....0\"\" WO 2017/200736 A2 23 November 2017 (23.11.2017) WIPO I PCT (51) International Patent Classification: 92121-1714 (US). LI, Junyi; 5775 Morehouse Drive, San H04W 52/50 (2009.01) Diego, California 92121-1714 (US). (21) International Application Number: (74) Agent: ANDERSON, Thomas D.; Holland & Hart LLP, PCT/US2017/030367 P.O. Box 11583, Salt Lake City, Utah 84147 (US). (22) International Filing Date: (81) Designated States (unless otherwise indicated, for every 01 May 2017 (01.05.2017) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, (25) Filing Language: English CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, (26) Publication Language: English DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, (30) Priority Data: KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, 62/337,168 16 May 2016 (16.05.2016) US MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, 62/343,116 30 May 2016 (30.05.2016) US PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, 15/372,059 07 December 2016 (07.12.2016) US SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, (71) Applicant: QUALCOMM INCORPORATED [US/US]; TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. ATTN: International IP Administration, 5775 Morehouse (84) Designated States (unless otherwise indicated, for every Drive, San Diego, California 92121-1714 (US). kind of regional protection available): ARIPO (BW, GH, (72) Inventors: ISLAM, Muhammad Nazmul; 5775 More- GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, _ house Drive, San Diego, California 92121-1714 (US). UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, LUO, Tao; 5775 Morehouse Drive, San Diego, Califor- TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, = nia 92121-1714 (US). SADIQ, Bilal; 5775 Morehouse Dri- EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, ye, San Diego, California 92121-1714 (US). CEZANNE, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, = Juergen; 5775 Morehouse Drive, San Diego, California TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, — KM, ML, MR, NE, SN, TD, TG). = = (54) Title: BEAM AND = = = OS = = = _ = 105 = = — / 21 = 110-a — = =number SYMBOL SELECTION TO TRANSMIT RACH 215 -- -- -- •• ; , io-b 1-71 205-1) a 210-a 205-a --- __ _ -- (57) : Methods, systems, and devices for wireless com- munication are described. A user equipment (UE) may identify a 115- a of beam directions that satisfy a transmission power con- dition. The UE may select a beam direction for a random access signal by choosing one of the beam directions that satisfies addi- tional criteria, such as transmitting a random access message at the A next opportunity. The transmission power may be selected based on a target receive power and a path loss for the selected beam. In some cases, if the sum of the path loss for a beam direction and the target receive power exceeds a maximum transmission power by more than a predetermined amount, the random access signal will not be transmitted using that beam. In some cases, if a response to the random access is not received, a different beam direction may be selected, the transmission power may be increased, or both. N M IN 0 0 N IN 1-1 0 N Beamfonning for First Symbol Beamfonning for Second Symbol \--- 200 FIG. 2 C [Continued on next page] WO 2017/200736 A2 MIDEDIMOHNIIMMEMODIMINHIEMIONEEDIS Declarations under Rule 4.17: — as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(H)) — as to the applicant's entitlement to claim earlier application (Rule 4.17(iii)) the priority of the Published: — without international search report and to be republished upon receipt of that report (Rule 48.2(g))