Patent SG-11201811738U-A (SG)
Title: Method for performing a re-establishment of a pdcp entity associated with um rlc entity in wireless communication system and a device therefor
Inventor: JO GEUMSAN
IPC: H04W28/14
Filed: 2018-07-30
Abstract: NO O C () INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 14 February 2019 (14.02.2019) WIP0 I PCT omit III ium VIII SID Em Imo oimIE (10) International Publication Number WO 2019/031751 Al -- S801 -- S803 -- S805 SDUs to the upper layer ---- S807 (51) International Patent Classification: H04W 28/06 (2009.01) H04L 29/06 (2006.01) H04W 28/14 (2009.01) (21) International Application Number: PCT/KR2018/008640 (22) International Filing Date: 30 July 2018 (30.07.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/543,395 10 August 2017 (10.08.2017) US (71) Applicant: LG ELECTRONICS INC. [KR/KR]; 128, Yeoui-daero, Yeongdeungpo-gu, Seoul 07336 (KR). (72) Inventors: JO, Geumsan; IP Center, LG Electronics Inc.19, Yangjae-daero 11-gil, Seocho-gu, Seoul 06772 (KR). YI, Seungjune; IP Center, LG Electronics Inc.19, Yangjae-daero 11-gil, Seocho-gu, Seoul 06772 (KR). (74) Agent: KIM, Yong In et al.; KBK & Associates7th Floor, 82, Olympic-ro, Songpa-gu, Seoul 05556 (KR). (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: METHOD FOR PERFORMING A RE-ESTABLISHMENT OF A PDCP ENTITY ASSOCIATED WITH UM RLC EN- TITY IN WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR a PDCP re-establishment is triggered if the reordering timer is mnning stopping and resetting a reordering timer of the PDCP entity delivering all PDCP SDUs stored in the PDCP reception buffer to the upper layer in ascending order of associated COUNT values after performing header decompression after delivering the stored PDCP performing remaining steps of the PDCP re-establishment (57) : The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for performing a re-establishment of PDCP entity associated with UM RLC entity in wireless communication system, the method comprising: when a re-establishment of a Packet Data Convergence Protocol (PDCP) entity is triggered, stopping and resetting, by the PDCP entity, a reordering timer of the PDCP entity if the reordering timer of the PDCP entity is running; and delivering, by the PDCP entity, all stored PDCP Service Data Unit (SDU) to upper layers in ascending order of associated COUNT values.