A method for synchronizing sensor data of a sensor system with the host time base of a host system, based on the clock ratio of the sensor time base to the host time base. To ascertain the clock ratio for at least two communication events, a time stamp acquisition is performed for each event, in which a sensor time stamp and a host time stamp is recorded. The communication events for ascertaining the clock ratio relate to a specific quantity of data. The ratio is ascertained/updated repeatedly; the duration of the individual communication events for the time stamp acquisition are measured; and by comparing each measured duration to a comparison value, possible irregularities in the communication event are detected. The host time stamp of a time stamp acquisition is corrected/replaced by a calculated host time stamp based on the measured irregularities. Also described is a related device for the method.

In a method for gathering time-variable data from electronic slave devices in data communication through a data transmission channel with an electronic master device, the slave devices periodically measure and store a current value of at least one respective time-variable parameter (P1(t), . . . Pn(t)). The master device sends a freeze command to the slave devices. Upon receipt of the freeze command from the master device, the slave devices freeze the last measured value of the at least one time-variable parameter. During a data-gathering time interval following sending of the freeze command, the master device gathers the frozen values from the slave devices.

A method for transmitting measured values from a sensor, wherein the measured values are transmitted cyclically, wherein at least two communication slots are provided in one communication cycle, wherein a first measured value, which represents a first physical effect detected by the sensor, is transmitted in a first communication slot, and a second measured value, which represents a second physical effect detected by the sensor, is transmitted in a second communication slot, characterized in that the measured value is transmitted in a communication cycle according to a defined relevance of the currently detected physical effect and/or of the measured value.

Systems and methods are described that collect spatio-temporal data using an RFID system that is capable of locating the spatial position of a sensor, which is typically unaware of its location. Such systems and methods can be contrasted with conventional RFID systems in that they are able to determine the location of sensors in space as opposed to with respect to read zones related to the underlying RFID reader infrastructure. One embodiment includes an RFID system having a plurality of read zones and configured to obtain the spatio-temporal state of sensors within a sensor cloud, where the spatio-temporal state of each sensor includes sensor information, a time stamp, and a spatial location specified independently of the read zones of the RFID system, a spatio-temporal database configured to store spatio-temporal state of a plurality of sensors over time, and an application server configured to trigger events based upon the detection of at least one condition by applying at least one filter to the data within the spatio-temporal database.

The invention relates to a system comprising a plurality of boards, each of which comprises a sensor and a control processor. The boards are connected together by a serial bus. One of the boards acts as master and the others as slaves. The master board is suitable for accessing the measurements of the plurality of boards and for sending these measurements, via a UART connection, to a host processor. The acquisition of the measurements takes place according to a specific synchronization method.

A method for synchronizing sensor data of a sensor system with the host time base of a host system, based on the clock ratio of the sensor time base to the host time base. To ascertain the clock ratio for at least two communication events, a time stamp acquisition is performed for each event, in which a sensor time stamp and a host time stamp is recorded. The communication events for ascertaining the clock ratio relate to a specific quantity of data. The ratio is ascertained/updated repeatedly; the duration of the individual communication events for the time stamp acquisition are measured; and by comparing each measured duration to a comparison value, possible irregularities in the communication event are detected. The host time stamp of a time stamp acquisition is corrected/replaced by a calculated host time stamp based on the measured irregularities. Also described is a related device for the method.

A sink node forming a sensor network system with one or more sensor nodes includes a communication time period allocation means for allocating, to a target sensor node, a communication time period for measurement information transmission by the target sensor node, to not overlap a communication time period for measurement information transmission by a node related to a wireless communication environment between the target sensor node and sink node, concerning measurement information transmission by a sensor target sensor node other than the target sensor node among the one or more sensor nodes. The communication time period allocation means adjusts a communication time period allocated for subsequent measurement information to be transmitted by the target sensor node, based on a predetermined wireless communication parameter related to the wireless communication environment between the target sensor node and sink node, concerning measurement information transmission by the target sensor node.

An information processing apparatus includes a communication unit and a communication controller. The communication unit communicates with an external apparatus with which communication is enabled for a limited period. In a predetermined period including a period which is set as the limited period for which communication with the external apparatus is enabled, the communication controller controls the communication unit so as to establish, for communication, a connection with the external apparatus.

The invention relates to a system comprising a plurality of boards, each of which comprises a sensor and a control processor. The boards are connected together by a serial bus. One of the boards acts as master and the others as slaves. The master board is suitable for accessing the measurements of the plurality of boards and for sending these measurements, via a UART connection, to a host processor. The acquisition of the measurements takes place according to a specific synchronization method.

A method for transmitting measured values from a sensor, wherein the measured values are transmitted cyclically, wherein at least two communication slots are provided in one communication cycle, wherein a first measured value, which represents a first physical effect detected by the sensor, is transmitted in a first communication slot, and a second measured value, which represents a second physical effect detected by the sensor, is transmitted in a second communication slot, characterized in that the measured value is transmitted in a communication cycle according to a defined relevance of the currently detected physical effect and/or of the measured value.