Patent SG-11201903196X-A (SG)
Title: ENHANCED MANAGEMENT OF ACs IN MULTI-USER EDCA TRANSMISSION MODE IN WIRELESS NETWORKS
Inventor: BARON STéPHANE
IPC: H04W84/12
Filed: 2017-10-16
Abstract: 107 102 STA G Transmission Channel (100) 106 J 110 AP 105 x , 41 103 Fig. 1 104 -} STA 6 STA 3 STA 4 STA 2 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 26 April 2018 (26.04.2018) WIP0 I PCT 011101 V III o olomium Ho mil VII I VII IE (10) International Publication Number WO 2018/073171 Al 1-1 1-1 N 1-1 N O GC 1-1 O O (51) International Patent Classification: H04W 74/00 (2009.01) H04B 7/0452 (2017.01) H04W 74/08 (2009.01) H04L 29/06 (2006.01) H04TY 84/12 (2009.01) (21) International Application Number: PCT/EP2017/076339 (22) International Filing Date: 16 October 2017 (16.10.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 1617880.8 21 October 2016 (21.10.2016) GB (71) Applicant: CANON KABUSHIKI KAISHA [JP/JP]; 30-2, Shimomaruko 3-chome, Ohta-ku, TOKYO, 146-8501 (JP). (71) Applicant (for AE only): CANON EUROPE LIMITED [GB/GB]; 3 The Square, Stockley Park, UXBRIDGE MID- DLESEX UB11 lET (GB). (72) Inventors: BARON, Stephan; 11 me des Blossiers, 35650 LE RHEU (FR). NEZOU, Patrice; 31 bis rue de Mi- Foret, 35340 LIFFRE (FR). VIGER, Pascal; Le Mesnil, 35150 JANZE (FR). (74) Agent: SANTARELLI; 49 avenue des Champs-Elysées, 75008 PARIS (FR). (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, — (54) Title: ENHANCED MANAGEMENT OF ACs IN MULTI-USER EDCA TRANSMISSION MODE IN WIRELESS NET- WORKS (57) : To avoid blocking node AC queues in the degraded MU EDCA mode due to regular OFDMA transmission of data from another AC queue in resource units provided by an AP, the present invention proposes to use a dedicated HEMUEDCATimer for each AC queue, in order for them to be able to exit the degraded MU EDCA mode independently of the other AC queues. In this respect, upon successfully transmitting data stored in two or more traffic queues, in each of one or more accessed resource units provided by the AP within one or more transmission opportunities, the node sets each traffic queue transmitting in the accessed resource unit in the degraded MU EDCA mode for a predetermined degrading duration counted down by a respective timer associated with the transmitting traffic queue. Next, upon expiry of any timer, the node switches back the associated traffic queue to the conventional EDCA mode. [Continued on next page] WO 2018/073171 Al MIDEDIMOHNIIMERIONICIIIIIMMOIIIMEHOIS 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))