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1. (WO2009058903) METHODS AND SYSTEMS FOR HFN HANDLING AT INTER-BASE STATION HANDOVER IN MOBILE COMMUNICATION NETWORKS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2009/058903    International Application No.:    PCT/US2008/081639
Publication Date: 07.05.2009 International Filing Date: 29.10.2008
IPC:
H04W 36/02 (2009.01)
Applicants: QUALCOMM Incorporated [US/US]; Attn: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121 (US) (For All Designated States Except US).
KITAZOE, Masato [JP/US]; (US) (For US Only).
HO, Sai Yiu Duncan [CA/US]; (US) (For US Only)
Inventors: KITAZOE, Masato; (US).
HO, Sai Yiu Duncan; (US)
Agent: PATEL, Milan I.; Attn: International Ip Administration, 5775 Morehouse Drive, San Diego, Califonia 92121 (US)
Priority Data:
60/983,838 30.10.2007 US
12/259,825 28.10.2008 US
Title (EN) METHODS AND SYSTEMS FOR HFN HANDLING AT INTER-BASE STATION HANDOVER IN MOBILE COMMUNICATION NETWORKS
(FR) PROCÉDÉS ET SYSTÈMES POUR LA MANIPULATION HFN AU NIVEAU D'UNE STATION INTERBASE DANS DES RÉSEAUX DE COMMUNICATION MOBILES
Abstract: front page image
(EN)Systems and methods for addressing the de-synchronization of the cryptsync between the network and the mobile stations (eNB) that can occur at mobility are addressed. De-synchronization is resolved by forwarding HFN and PDCP Sequence Number(s) from the source eNB to the target eNB. In order to avoid re-use of a crytosync for a given key, a backward offset from the initial COUNT value is used by the target eNB. These approaches do not require an over-the-air signaling and the COUNT value handling in the network is transparent to the mobile station.
(FR)L'invention concerne des systèmes et des procédés pour adresser la désynchronisation du cryptsync entre le réseau et les stations mobiles (eNB) qui peut se produire lors de la mobilité. La désynchronisation est résolue en acheminant un ou des numéros de séquence HFN et PDCP de la source eNB à la cible eNB. Afin d'éviter une réutilisation d'un crytosync pour une clé donnée, un décalage vers l'arrière de la valeur de DECOMPTE initiale est utilisé par l'eNB cible. Ces approches ne requièrent pas une signalisation radio et la manipulation de valeur de DECOMPTE dans réseau est transparente pour la station mobile.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)