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1. (WO2004008795) POSITIONING TECHNIQUE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2004/008795    International Application No.:    PCT/FI2003/000553
Publication Date: 22.01.2004 International Filing Date: 08.07.2003
Chapter 2 Demand Filed:    04.02.2004    
IPC:
G01S 5/10 (2006.01), G01S 5/02 (2010.01), G06F 9/45 (2006.01), H04W 64/00 (2009.01)
Applicants: EKAHAU OY [FI/FI]; Tammasaarenlaituri 3, FIN-00180 Helsinki (FI) (For All Designated States Except US).
MISIKANGAS, Pauli [FI/FI]; (FI) (For US Only).
LEKMAN, Lare [FI/FI]; (FI) (For US Only)
Inventors: MISIKANGAS, Pauli; (FI).
LEKMAN, Lare; (FI)
Agent: KOLSTER OY AB; Iso Roobertinkatu 23, P.O. Box 148, FIN-00121 Helsinki (FI)
Priority Data:
20021357 10.07.2002 FI
Title (EN) POSITIONING TECHNIQUE
(FR) TECHNIQUE DE POSITIONNEMENT
Abstract: front page image
(EN)A target device's location in a radio network is estimated by maintaining a probabilistic model (PM) for several sam-ple points that indicate expected distributions of signal values at a given location. The target device observes sig-nal values (OS), wherein the sequence of observations and the respective locations constitute a Hidden Markov Model. A graph (G) models the topology of the positioning environment. The graph indicates several nodes which are permissible locations in the environment and several arcs which are permissible transitions between two nodes. The graph (G) is used to estimate the target device's location based on the probabilistic model (PM) and the sequence of observations (OS).
(FR)L'emplacement d'un dispositif cible dans un réseau radio est estimé au moyen de la gestion d'un modèle probabiliste (PM) pour plusieurs points échantillons qui indiquent des distributions attendues de valeurs de signaux en un emplacement donné. Le dispositif cible observe les valeurs de signaux (OS), la séquence des observations et des emplacements respectifs constituants un modèle de Markov caché. Un graphe (G) modélise la topologie de l'environnement du positionnement. Ce graphe indique plusieurs noeuds qui sont des emplacements admissibles dans l'environnement et plusieurs arcs qui sont des transitions admissibles entre deux noeuds. Le graphe (G) est utilisé pour estimer l'emplacement d'un dispositif cible sur la base du modèle probabiliste (PM) et de la séquence d'observations (OS).
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, 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, HU, IE, IT, LU, MC, NL, 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)