Patent SG-11201903412T-A (SG)
Title: Protection of mission-critical push-to-talk multimedia broadcast and multicast service subchannel control messages
Inventor: SEDLACEK IVO
IPC: H04W12/06
Filed: 2017-05-10
Abstract: AGenerate Multimedia Broadcast and Multicast Service (MBMS) Subchannel Control Key Send First Messages to UEs in Unicast With Generated MSCCK Generate MBMS Subchannel Control Messages (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) WIPO I PCT omit VIII °nolo mom 1E011E1100110 mom oimIE (10) International Publication Number WO 2018/078460 Al (51) International Patent Classification: H04W 12/06 (2009.01) H04W 4/10 (2009.01) H04W 12/10 (2009.01) (21) International Application Number: PCT/IB2017/052743 (22) International Filing Date: 10 May 2017 (10.05.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/414,890 31 October 2016 (31.10.2016) US (71) Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE/SE]; SE-164 83, SE-164 83 Stockholm (SE). (72) Inventors: SEDLACEK, Ivo; Mezi Zahradami 464, 250 64 Hovorcovice (CZ). AXELL, Jorgen; Vasseurs vag 35, SE-182 39 Danderyd (SE). BEN HENDA, Noamen; Tu- multgrand 228, SE-162 47 Stockholm (SE). (74) Agent: WESTOVER, Ben et al.; 6300 Legacy Drive, M/S EVR 1-C-11, Plano, Texas 75024 (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, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, 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: PROTECTION OF MISSION-CRITICAL PUSH-TO-TALK MULTIMEDIA BROADCAST AND MULTICAST SERVICE SUBCHANNEL CONTROL MESSAGES (57) : A Mission-Critical Push-To-Talk (MCPTT) node (410, 510, 600, 800) is connected to a group of user equipments (UEs) (405, 505, 700, 900) served by the MCPTT node. The MCPTT node generates a Multimedia Broadcast and Multicast Service (MBMS) Subchannel Control Key (MSCCK) (S305), sends S305 first messages to the UEs in unicast, wherein the first messages include the gener- ated MSCCK (S310), generates at least one MBMS subchannel control message (S315), applies integrity protection and/or confidentiality protection to the at least one MBMS subchannel control message with the MSCCK (S320), and sends the at least one MBMS subchannel control message in multicast (S325). S315 5310 W O 20 18/07 8 460 Al Hash and/or Encrypt MBMS Subchannel Control Messages with S320 MSCCK Send MBMS Subchannel Control Messages in Broadcast to group of S325 UEs FIG. 3A