[Object] To provide a novel and improved communication system and communication device that make it possible to reduce an amount of time from when communication with an external device is completed to when communication data corresponding to a communication result is output to another device. [Solution] Provided is a communication system including: a communication device configured to transmit a selection solution that is selected depending on a result of first communication with an external device; and a control device configured to receive the selection solution from the communication device through second communication between the communication device and a communication partner that is different from the external device serving as a communication partner in the first communication.

The invention relates to a method (METH) for assisting in determining the position of an identifier (I) for accessing and starting a vehicle (V), relative to the vehicle (V), comprising: transmission (Em_TS.sub.vp), from a first device, either the vehicle (V) or the identifier (I) to a second device, different from the first, either the vehicle (V) or the identifier (I), at a transmission time t0, of an initial train (TS.sub.vp) of N sinusoidal signals, having identical amplitudes and respective frequencies f.sub.p, p[1;N], for any p between 1 and N1; reception (Rec_TS.sub.vp) by the second device of an image train (TS.sub.vp) corresponding to the initial train (TS.sub.vp, TS.sub.ip) altered by the transmission (Em_TS.sub.vp); construction (Cons_Sp.sub.v) of a frequency spectrum (Sp.sub.v) for the image train (TS.sub.vp); inverse Fourier transformation (TFI_Sp.sub.v) of the spectrum (Sp.sub.v), allowing a time signature (Sg.sub.v) to be obtained; first integration (Int1_Sg.sub.v) of the time signature (Sg.sub.v), between the transmission time t.sub.0 and a pre-determined intermediate time t.sub.int, producing a first result (Rlt1); second integration (Int2_Sg v) of the time signature (Sg.sub.v) between the intermediate time t.sub.int and a pre-determined end time t.sub.f, producing a second result (Rlt2); comparison (Comp_1/2) of a ratio (R) of the first result (Rlt1) to the second result (Rlt2) with a threshold value (S), so that it is possible to determine if the identifier (I) is positioned inside the vehicle (V).

A method for controlling access in a system comprising a portable device associated with a user and an access control device, includes the portable device and the access control device being configured to wirelessly communicate with each other, the method comprising: pairing the portable device and the access control device, upon the portable device detecting proximity to the access control device, determining at the portable device a signal strength over time of a signal received from the access control device, comparing the determined signal strength over time with a previously determined reference signal strength profile, and upon the determined signal strength over time being considered congruent with the reference signal strength profile, controlling the access control device.

Systems and techniques for a are described herein. In an example, an access control system may regulate access to an asset. The access control system is adapted to receive a credential for the asset from a key device associated with a user using a first wireless connection. The access control system may be further adapted to store the credential in a cache of memory. The access control system may be further adapted to establish a second wireless connection with the key device. The access control system may be further adapted to request a validation of the credential from an authorization service in response to establishing the second wireless connection with the key device. The access control system may receive a validation token from the authorization service. The access control system may be further adapted to store the validation token in the cache.

In an access control system (1) for a building, a security gate (14) separates a restricted-access zone (20) from a public zone (22). Radio devices (6) are arranged at established distances from the security gate (14) and define a monitoring area. A control device (10, 12) of the system (1) is communicatively coupled to a building device (16), and a data storage device (18) stores processing instructions for situation-specific calibration modes. A signal processing device (8) evaluates the radio communication in the monitoring area, determines at least one situation indicator therefrom which indicates a radio situation prevailing in the monitoring area and, for each radio device (6), captures a received signal strength indicator and uses it to determine at least one situation indicator (RSSI.sub.i) based on radio communication with a first wireless device (2). The signal processing device (8) selects a calibration mode assigned to the at least one situation indicator and reads the processing instructions assigned to this calibration mode from the data storage device (18). The signal processing device (8) determines a current position (P) of the first wireless device (2) as a function of the received signal strength indicators (RSSI.sub.i) according to the processing instructions that have been read.

In one aspect, a universal receiver is provided for being operably coupled to a movable barrier operator. The universal receiver includes at least one radio antenna adapted to receive signals transmitted at different frequencies and a controller operably coupled to the at least one radio antenna. The controller is adapted to determine a code of a signal received by the at least one radio antenna at any one of the different frequencies. The controller being further adapted to learn the code in response to a user-independent learning condition being met.

The invention relates to a method for estimating a distance (d) between a vehicle (10) fitted with a first wireless communication module (12) and an identifier (20) fitted with a second wireless communication module (22), including the following steps: generating a randomly ordered list; receiving, by at least one of the first and second wireless communication modules (12, 22), electromagnetic signals having a frequency that changes consecutively from among a plurality of frequencies in accordance with said list; for each frequency in the plurality of frequencies, measuring a reception phase of the electromagnetic signal having the relevant frequency; estimating said distance (d) on the basis of the measured phases. An electronic unit (11) for a vehicle (10) is also described.

In one aspect, a universal receiver is provided for being operably coupled to a movable barrier operator. The universal receiver includes at least one radio antenna adapted to receive signals transmitted at different frequencies and a controller operably coupled to the at least one radio antenna. The controller is adapted to determine a code of a signal received by the at least one radio antenna at any one of the different frequencies. The controller being further adapted to learn the code in response to a user-independent learning condition being met.

In one aspect, a universal receiver is provided for being operably coupled to a movable barrier operator. The universal receiver includes at least one radio antenna adapted to receive signals transmitted at different frequencies and a controller operably coupled to the at least one radio antenna. The controller is adapted to determine a code of a signal received by the at least one radio antenna at any one of the different frequencies. The controller being further adapted to learn the code in response to a user-independent learning condition being met.

A vehicle door handle for use on a motor vehicle includes a handle and a handle support, the handle being mounted in the handle support, the handle is configured in the form of an elongated body, with a first end section, a second end section and a gripping section. Bearing sections project into the handle support and are supported there. In a cavity of the handle, an antenna for UWB signal transmission is arranged and coupled with a control circuit. In a further development of the invention, it is coupled with a proximity sensor. An authentication system and the use of an inventive vehicle door handle in an authentication system is also disclosed.