Patent SG-11201901232R-A (SG)
Title: Improving transmission opportunity truncation
Inventor: TIAN QINGJIANG
IPC: H04W74/08
Filed: 2017-08-24
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property :::` , Organization 3 1 MI 11111 0 11101 HOE HI 1 0 0111111100 11111 OH 0111 OE 11110 MAMIE International Bureau (10) International Publication Number (43) International Publication Date .....•\"\"- WO 2018/057221 Al 29 March 2018 (29.03.2018) WIP0 I PCT (51) (21) (22) (25) Filing Language: (26) (30) (71) Applicant: QUALCOMM INCORPORATED [US/US]; (72) International Patent Classification: ASTERJADHI, Alfred; 5775 Morehouse Drive, San H04W 74/08 (2009.01) Diego, California 92121-1714 (US). MERLIN, Simone; International Application Number: 5775 Morehouse Drive, San Diego, California 92121-1714 PCT/US2017/048353 (US). International Filing Date: (74) Agent: SCHRAMM, Paul, M.; Holland & Hart LLP, P.O. 24 August 2017 (24.08.2017) Box 11583, Salt Lake City, Utah 84147 (US). English (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, Publication Language: English AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, Priority Data: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 62/398,273 22 September 2016 (22.09.201 US DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, 6) 15/684,898 23 August 2017 (23.08.2017) US 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, ATTN: International IP Administration, 5775 Morehouse OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, Drive, San Diego, California 92121-1714 (US). 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. Inventors: TIAN, Qingjiang; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). BARRIAC, Gwen- (84) Designated States (unless otherwise indicated, for every dolyn Denise; 5775 Morehouse Drive, San Diego, Cal- kind of regional protection available): ARIPO (BW, GH, ifornia 92121-1714 (US). PATIL, Abhishek Pramod; GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 5775 Morehouse Drive, San Diego, California 92121-1714 UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, (US). ZHOU, Yan; 5775 Morehouse Drive, San Diego, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, California 92121-1714 (US). CHERIAN, George; 5775 EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, Morehouse Drive, San Diego, California 92121-1714 (US). MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, — = = _ = Title: 115-dt 410 IMPROVING TRANSMISSION OPPORTUNITY TRUNCATION 115-e (( d II 4 , US (57) : This disclosure provides systems, methods, and apparatus, in- )) cluding computer programs encoded on computer storage media, for improv- ing transmission opportunity (TxOP) truncation in wireless communication. In some implementations, a transmit opportunity (TxOP) period truncation or i, whether to update a network allocation vector (NAV) timing based on a mes- sage that includes transmitter and receiver information (such as a transmitter 405 address (TA) and a receiver address (RA)) may be determined. For example, a station may receive a contention-free end (CF-End) frame and determine a TxOP period truncation based on comparing a TA and an RA included in the CF-End frame with a TA and an RA included in an earlier received message (e.g., an RTS). Such information may be compared to other TAs or RAs asso- ciated with NAV timing values and the NAV timing may be set, reset, updated, or canceled based on the comparison. 400 = (54) = = - = _ = 420 435 \ I dte NA , = 4I5 N I pdate NAV 1 DATA — = = = - = 42' 1 pdate NAV 430 -\ 1-pddt 1 NA‘ CF END 11 11 ei IN kin © -.... co Il © ei 440 - T_ pda1 NAV Hismry 44 5 .. \,,1 1 Nate 450 Timing I NAV ei c~ntenQ ,n FIG. 4 O [Continued on next page] WO 2018/057221 Al MIDEDIMOM0101011EFIDINIRIONIHOHHOIIIMEMOIMIE 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))