Patent SG-11201902202P-A (SG)
Title: Method and apparatus for reestablishing radio communication links due to radio link failure
Inventor: ESCOTT ADRIAN EDWARD
IPC: H04L29/06
Filed: 2017-10-30
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) -., (19) World Intellectual Property 1#11101111 0 11101 HOE 3E1 0 1011111111111011 HEIM NH III OEN Organization . International Bureau (10) International Publication Number (43) International Publication Date ......'\"' WO 2018/085181 Al 11 May 2018 (11.05.2018) WIPO I PCT (51) (21) (22) (25) Filing Language: (26) (30) International Patent Classification: (71) Applicant: QUALCOMM INCORPORATED [US/US]; HO4W 76/19 (2018.01) H04L 29/06 (2006.01) ATTN: International IP Administration, 5775 Morehouse H04W 12/10 (2009.01) Drive, San Diego, California 92121-1714 (US). International Application Number: (72) Inventors: ESCOTT, Adrian Edward; 5775 Morehouse PCT/US2017/058947 Drive, San Diego, California 92121-1714 (US). DHANDA, Mungal Singh; 5775 Morehouse Drive, San Diego, Califor- International Filing Date: 30 October 2017 (30.10.2017) nia 92121-1714 (US). PALANIGOUNDER, Anand; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). English LEE, Soo Bum; 5775 Morehouse Drive, San Diego, Cali- fornia 92121-1714 (US). Publication Language: English (74) Agent: LOZA, Julio; Loza & Loza, LLP, 305 N. Second Priority Data: Avenue, #127, Upland, California 91786-6064 (US). 62/417,931 04 November 2016 (04.11.2016) US 15/443,981 27 February 2017 (27.02.2017) 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: METHOD 800 : One (RAN) that uses communication be reestablished that enable a allow or reject reestablishment of the radio communication (MAC) based in part on one FAILURE Ilene AND APPARATUS feature pertains to a method that device is experiencing 816 R RCConn FOR REESTABLISHING RADIO COMMUNICATION LINKS DUE TO RADIO LINK x 810 Transmit UE 814 Switch(NAS MACuf, Cell ID). —1 Path Switch ACK(). also and that the to include at least COUNT, Target 828 1 828 communication connection transmitted to authenticate the wireless value with a first radio access that the wire- connection RAN that includes para- communication device message authentication wireless communication 826 determining communication — UE 802 Source RAN 804 Target RAN 806 MME 808 UE experiences control with core network RLF and finds new cell. 820 1 ( 812 RRCConnectionReestablishmentRequest(). context without keys. includes establishing a radio failure -access stratum (NAS) COUNT ection Send unsecured RACConnectionReestablishmentComplete Path MACu 822 V eri fy NAS L =MAC mmE . Increment r 824 COUNT. a at the R eestablishm MAC uE , coupled r to carry ► 4 ent(). r 818 — Increment NAS COUNT. plane a second (NAS COUNT, I signaling connections radio link RAN. A reestablishment request message is node communicatively or more bits of a non GUT1). (RLF) with the first FIG. 8 user plane data. The method to the second RAN connection. The parameters RAN maintained includes radio the second 1-1 1-1 (57) Ot node less in GO should © meters GC and 1-1 © code N device. C [Continued on next page] WO 2018/085181 Al MIDEDIMOMOIDEIREIDIONIMHEM1HOIREM 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). Declarations under Rule 4.17: — as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(11)) — as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: — with international search report (Art. 21(3))