Abstract:
Un dispositivo de comunicaciones portátil alimentado por batería (10), estando el dispositivo (10) configurado para: funcionar en un modo de comunicaciones bidireccionales en el que la voz y/o los datos se comunican de manera bidireccional usando un protocolo de comunicaciones bidireccionales; y funcionar (S1) en un modo de baliza de emergencia, en el que el dispositivo (10) está configurado, cuando se encuentra en el modo de baliza de emergencia, para: transmitir periódicamente (S3) un mensaje de posicionamiento de emergencia usando bluetooth de baja energía a máxima potencia y usando el protocolo de comunicaciones bidireccionales, en donde el mensaje de posicionamiento de emergencia tiene una forma que permite que un dispositivo de búsqueda (11) determine un rumbo al dispositivo (10) desde el dispositivo de búsqueda (11), definiendo la transmisión (S3) del mensaje de posicionamiento de emergencia un período de transmisión de baliza; escuchar (S4) las transmisiones usando el protocolo de comunicaciones bidireccionales en un período de respuesta de baliza inmediatamente posterior al período de transmisión de baliza; entrar (S9) en un modo de baliza mejorado en respuesta a la recepción de una respuesta de baliza en el período de respuesta de baliza; funcionar en el modo de baliza mejorado, en el que el dispositivo (10) está configurado cuando se encuentra en el modo de baliza mejorado, para: transmitir mensajes de posicionamiento de emergencia usando bluetooth de baja energía a intervalos que son más cortos que el intervalo entre los sucesivos mensajes de posicionamiento de emergencia en el modo de baliza de emergencia; y cuando se encuentre en el modo de baliza de emergencia o el modo de baliza mejorado, abstenerse de alimentar la circuitería de transmisión y recepción del dispositivo (10) de otra forma que no sea durante el período de transmisión de baliza y el período de respuesta de baliza.
Abstract:
Apparatus (30) comprises a battery power supply, a radio-frequency transceiver, a multi-element antenna, and processor and memory. Software causes the apparatus (30): when in an idle mode, to broadcast positioning service advertisements and to refrain from broadcasting positioning packets, when in a positioning mode to broadcast positioning packets from each of the elements of the antenna (32A-C) such as to allow a mobile device (10) to determine a bearing to the mobile device (10) from the apparatus (30), and to transition from the idle mode to the positioning mode in response to receiving either a) a wake-up command or b) a positioning packet, from another apparatus including a multi-element antenna. The apparatus (30) may comprise a Bluetooth Low Energy transceiver; and software that causes the apparatus (30): to transmit advertisements for positioning services on a first channel; and to broadcast positioning packets on a second channel such as to allow a mobile device (10) to determine a bearing to the mobile device (10) from the apparatus (30), wherein the first and second channel are on different frequencies.
Abstract:
A method comprises using a first directional transceiver (14A) to determine a first angle (α1) between a first vector (V1) from the first directional transceiver to a second directional transceiver (14B) and a second vector (V2) from the first directional transceiver to a third directional transceiver (14C), using the second directional transceiver to determine a second angle (α2) between a third vector (V3) from the second directional transceiver to the first directional transceiver and a fourth vector (V4) from the second directional transceiver to the third directional transceiver, calculating a location, relative to a local coordinate system, of the third directional transceiver using the first and second angles and locations in the local coordinate system of the first and second directional transceivers, the local coordinate system being defined relative to the locations of the first, second, and third directional transceivers, and calculating an orientation relative to the local coordinate system of the first directional transceiver using directions of the first and second vectors relative to the first directional transceiver and the locations in the local coordinate system of the first, second and third directional transceivers.
Abstract:
An apparatus configured at least to perform: receiving a signal constituting a positioning packet at a positioning device; processing the signal by: demodulating a header of the positioning packet from the signal; extracting an identifier from the header of the positioning packet; part processing samples of the signals; and forming a message from the part-processed samples; in response to receiving the signal, deactivating a receiver circuit of the positioning device for a period of time, the period of time constituting a sum of a time taken by the positioning device to process the signal and a preconfigured or random delay time; and activating the receiver circuit of the positioning device immediately subsequent the period of time.
Abstract:
Method, apparatus, and computer program product example embodiments provide short-range communication based location finding. According to an example embodiment of the invention, a method comprises receiving, by a first transceiver of an apparatus mounted on a moveable platform, from a remote device, one or more wireless packets including information packets containing angle of arrival information from the remote device, wherein the moveable platform is in motion relative to the remote device; determining in the apparatus, at least a first angle of arrival from the received angle of arrival information; and generating distance estimation data in the apparatus relative to the remote device, based on the determined first angle of arrival.