RTS/CTS mechanism with 802.11 for indoor location J. Prieto 1 , A. Bahillo 1 , S. Mazuelas 1 , J. Blas 1 , andez 2 , and R. M. Lorenzo 2 P. Fern´ 1 CEDETEL (Center for the Development of Telecommunications). Parque Tecnol´ ogico de Boecillo (Valladolid). Spain Email: jprieto@cedetel.es 2 Department of Signal Theory and Communications and Telematic Engineering University of Valladolid . Spain Email: patfer@tel.uva.es NAV08/ILA37 October 2008
Outline Location approach TOA Estimation Assessment of the system Summary Outline Location approach 1 Wireless cellular location techniques TOA Estimation 2 RTT measuring Hardware design Assessment of the system 3 Experimental Setup RTT Measurements Distance Estimation Indoor Location Summary 4 Conclusions and future work jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach TOA Estimation Wireless cellular location techniques Assessment of the system Summary Outline Location approach 1 Wireless cellular location techniques TOA Estimation 2 RTT measuring Hardware design Assessment of the system 3 Experimental Setup RTT Measurements Distance Estimation Indoor Location Summary 4 Conclusions and future work jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach TOA Estimation Wireless cellular location techniques Assessment of the system Summary Time of Arrival (ToA) Time Difference of Arrival (TDoA) Angle of Arrival (AoA) Received Signal Strength (RSS) jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach TOA Estimation Wireless cellular location techniques Assessment of the system Summary Time Difference of Arrival (TDoA) Time of Arrival (ToA) Received Signal Strength (RSS) Angle of Arrival (AoA) jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach TOA Estimation Wireless cellular location techniques Assessment of the system Summary Time of Arrival (ToA) Time Difference of Arrival (TDoA) Received Signal Strength (RSS) Angle of Arrival (AoA) jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach TOA Estimation Wireless cellular location techniques Assessment of the system Summary Time Difference of Arrival (TDoA) Time of Arrival (ToA) Angle of Arrival (AoA) Received Signal Strength (RSS) jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Outline Location approach 1 Wireless cellular location techniques TOA Estimation 2 RTT measuring Hardware design Assessment of the system 3 Experimental Setup RTT Measurements Distance Estimation Indoor Location Summary 4 Conclusions and future work jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary RTS/CTS handshake AP processing time constant and independent of the traffic load Round Trip Time RTT = t p + t proc + t p jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary RTS/CTS handshake AP processing time constant and independent of the traffic load Round Trip Time RTT = t p + t proc + t p jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Round Trip Time RTS/CTS handshake AP processing time constant and independent of the traffic load RTT = t p + t proc + t p t p RTS propagation time jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Round Trip Time RTS/CTS handshake AP processing time constant and independent of the traffic load RTT = t p + t proc + t p t proc AP processing time jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Round Trip Time RTS/CTS handshake AP processing time constant and independent of the traffic load RTT = t p + t proc + t p t p CTS propagation time jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary RTS last bit departure CTS first bit arrival jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary RTS last bit departure CTS first bit arrival jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Outline Location approach 1 Wireless cellular location techniques TOA Estimation 2 RTT measuring Hardware design Assessment of the system 3 Experimental Setup RTT Measurements Distance Estimation Indoor Location Summary 4 Conclusions and future work jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Hardware design Objectives Solutions 1 RTT measurements 1 No need of synchronization 2 External measuring system 2 Improve PC clock resolution 3 RADAR location model 3 System independence 4 Multi-layer PCB 4 Minimize hardware size 5 Copper planes & bypass 5 Keep the voltage constant capacitors and noise-free 6 Device-system interaction 6 Automation jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Hardware design Objectives Solutions 1 RTT measurements 1 No need of synchronization 2 External measuring system 2 Improve PC clock resolution 3 RADAR location model 3 System independence 4 Multi-layer PCB 4 Minimize hardware size 5 Copper planes & bypass 5 Keep the voltage constant capacitors and noise-free 6 Device-system interaction 6 Automation jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Hardware design Objectives Solutions 1 RTT measurements 1 No need of synchronization 2 External measuring system 2 Improve PC clock resolution 3 RADAR location model 3 System independence 4 Multi-layer PCB 4 Minimize hardware size 5 Copper planes & bypass 5 Keep the voltage constant capacitors and noise-free 6 Device-system interaction 6 Automation jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Hardware design Objectives Solutions 1 RTT measurements 1 No need of synchronization 2 External measuring system 2 Improve PC clock resolution 3 RADAR location model 3 System independence 4 Multi-layer PCB 4 Minimize hardware size 5 Copper planes & bypass 5 Keep the voltage constant capacitors and noise-free 6 Device-system interaction 6 Automation jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Hardware design Objectives Solutions 1 RTT measurements 1 No need of synchronization 2 External measuring system 2 Improve PC clock resolution 3 RADAR location model 3 System independence 4 Multi-layer PCB 4 Minimize hardware size 5 Copper planes & bypass 5 Keep the voltage constant capacitors and noise-free 6 Device-system interaction 6 Automation jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Hardware design Objectives Solutions 1 RTT measurements 1 No need of synchronization 2 External measuring system 2 Improve PC clock resolution 3 RADAR location model 3 System independence 4 Multi-layer PCB 4 Minimize hardware size 5 Copper planes & bypass 5 Keep the voltage constant capacitors and noise-free 6 Device-system interaction 6 Automation jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
Outline Location approach RTT measuring TOA Estimation Hardware design Assessment of the system Summary Hardware design Objectives Solutions 1 RTT measurements 1 No need of synchronization 2 External measuring system 2 Improve PC clock resolution 3 RADAR location model 3 System independence 4 Multi-layer PCB 4 Minimize hardware size 5 Copper planes & bypass 5 Keep the voltage constant capacitors and noise-free 6 Device-system interaction 6 Automation jprieto@cedetel.es RTS/CTS mechanism with 802.11 for indoor location
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