Patent SG-11201902913U-A (SG)
Title: QoS MANAGEMENT FOR MULTI-USER EDCA TRANSMISSION MODE IN 802.11AX NETWORKS
Inventor: VIGER PASCAL
IPC: H04W84/18
Filed: 2017-10-27
Abstract: IsMedium free? Decrease AC[] backoff counters after AIFSN[] Fig. 10 new data in AC .\ 901 FIFO 904 900 EDCA transmission 1030 1040 1050 1070 yes Is expiring AC in MU mode? no Select data from this AC Initiate EDCA transmission and send Update EDCA CW parameters according TX success Calculate AC[] backoff 1000 1010 1020 EDCA backoff countdown AA yes End of AC[] backoff 9 1099 L Select AC (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 03 May 2018 (03.05.2018) WIP0 I PCT omit °nolo mom im olo Immo oimIE (10) International Publication Number WO 2018/078101 Al (51) International Patent Classification: H04W 74/08 (2009.01) H04W 84/18 (2009.01) (21) International Application Number: PCT/EP2017/077611 (22) International Filing Date: 27 October 2017 (27.10.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 1618262.8 28 October 2016 (28.10.2016) 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 Sttockley Park, UXBRIDGE Mid- dlesex UB11 lET (GB). (72) Inventors: VIGER, Pascal; Le Mesnil, 35150 JANZE (FR). BARON, Stephane; 11 rue des Blossiers, 35650 LE RHEU (FR). NEZOU, Patrice; 31 bis rue de Mi-Foret, 35340 LIFFRE (FR). (74) Agent: SANTARELLI; 49 avenue des Champs Elysees, 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, (54) Title: QoS MANAGEMENT FOR MULTI-USER EDCA TRANSMISSION MODE IN 802.11AX NETWORKS (57) : The invention relates to wireless network comprising an access point and non-AP stations. The station has traffic queues and associated a backoff counters which are decremented over time upon continuously sensing the medium as free during more than respective AIFS durations. To compensate additional opportunities provided by OFDMA RUs, a queue switches to an MU mode upon transmitting its data in an RU provided by the AP. To restore dynamicity of the backoff counters, frozen in the MU mode in the known techniques, embodiments provide the following at each expiry of one of the queue backoff counters: the current mode of the expiring traffic queue is determined; in case of legacy mode, the station accesses the channel to transmit data from the queue; whereas in case of MU mode, a new backoff value is drawn to reset the expiring backoff counter, without having data from the queue being transmitted. [Continued on next page] WO 2018/078101 Al MIDEDIMOMOIDEIREEMOMMHOIDIMMOIMIE 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))