Patent SG-11201908608R-A (SG)
Title: Ue selection of contention-free and contention-based random access for handover
Inventor: NAGARAJA SUMEETH
IPC: H04W74/00
Filed: 2018-05-04
Abstract: CBRA CFRA Initiate the random access request using the CBRA. Initiate a random access request using the CFRA. ) 403 404 FIG. 4 Receive a random access configuration, wherein the random access configuration includes configuration for CFRA and CBRA. Determine a first random access resource, wherein the first random access resource maps to one or more beams from a target base station. ) 401 ) 400 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 08 November 2018 (08.11.2018) WIPO I PCT o iimion ono looi olo muoi (10) International Publication Number WO 2018/204766 A2 (51) International Patent Classification: H04W 74/08 (2009.01) (21) International Application Number: PCT/US2018/031059 (22) International Filing Date: 04 May 2018 (04.05.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/502,159 05 May 2017 (05.05.2017) US 15/970,554 03 May 2018 (03.05.2018) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (72) Inventors: NAGARAJA, Sumeeth; QUALCOMM In- corporated, ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). LUO, Tao; QUALCOMM Incorporated, ATTN: Inter- national IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). JOHN WILSON, Makesh Pravin; QUALCOMM Incorporated, ATTN: In- ternational IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). AKKARAKARAN, Sony; QUALCOMM Incorporated, ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). MONTOJO, Juan; QUAL- COMM Incorporated, ATTN: International IP Adminis- tration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). CHEN, Shengbo; QUALCOMM In- corporated, ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). NAM, Wooseok; QUALCOMM Incorporated, ATTN: In- ternational IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). WANG, Xiao Feng; QUALCOMM Incorporated, ATTN: International IP Ad- ministration, 5775 Morehouse Drive, San Diego, Cali- fornia 92121-1714 (US). CHAKRABORTY, Kaushik; QUALCOMM Incorporated, ATTN: International IP Ad- ministration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (74) Agent: MEANEY, Thomas J.; 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, (54) Title: UE SELECTION OF CONTENTION-FREE AND CONTENTION-BASED RANDOM ACCESS FOR HANDOVER W O 20 18/ 20 47 66 A2 (57) : User equipment (UE) selection of contention-free random access (CFRA) and contention-based random access (CBRA) for handover processing is discussed. The aspects in- clude receiving a random access configuration at the UE includ- ing configuration for CFRA and CBRA. The UE will determine a first random access resource, wherein the first random access re- source maps to one or more beams from a target base station. The UE may initiate a random access request using the CFRA when the first random access resource is a contention-free resource, and initiate the random access request using the CBRA when the first random access resource is a contention-based resource. [Continued on next page] WO 2018/204766 A2 IMIOHOIMIREIHHIMINEEMERHOMMIE 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: without international search report and to be republished upon receipt of that report (Rule 48.2(g))