A method for assisting in locating a position of a mobile wireless device includes: obtaining location information of an approximate location of the mobile wireless device; generating an almanac of base stations based at least in part on proximity of locations of the base stations to the approximate location of the mobile wireless device, the almanac of base stations comprising at least one cooperative terrestrial base station that can communicate with the mobile wireless device in at least one mode and at least one uncooperative terrestrial base station capable of bi-directional communications and configured to prevent data and voice communications with the mobile wireless device, the at least one uncooperative terrestrial base station being configured to acknowledge a message received from the mobile wireless device; and providing the almanac of base stations to the mobile wireless device.

Methods and apparatus are disclosed for sharing assistance information relating to an uplink signal transmitted by a first User Equipment. The assistance information may be used to assist a wireless communication device to intercept the uplink signal and measure its time of arrival. The assistance information may be used to assist in the calculation of a position or time, based on the measured time of arrival.

A method of measuring positioning signals at a user equipment (UE) includes: obtaining, at the UE, one or more transmission characteristics corresponding to each of a plurality of positioning signals; obtaining, at the UE, topographic information regarding physical features of a region associated with the UE and the plurality of positioning signals; determining, at the UE, one or more selected positioning signals, of the plurality of positioning signals, to measure based on the one or more transmission characteristics and the topographic information; and measuring, at the UE, the one or more selected positioning signals to produce one or more measurements.

A system and method including a first device provided on an object and configured to receive wireless communication signals from a remote device in accordance with a device signaling protocol. The first device may include a high-frequency interface operable to transmit and receive communication signals via a physical medium, where the high-frequency interface is configured to communicate via the physical medium in accordance with same device signaling protocol utilized for wireless communications.

A method and transmit/receive apparatus in a wireless communication system supporting ranging capability are provided. The method and the transmit/receive apparatus comprises: identifying ranging apparatuses; identifying a ranging control message (RCM) including a ranging device management information element (RDM IE) and roles of the ranging apparatuses, the RDM IE including a content field, wherein the ranging apparatuses include the transmit apparatus and at least one receive apparatus; and transmitting, to the ranging apparatuses over a broadcast channel, the RCM including the RDM IE in a ranging round (RR).

Recent decades have brought tremendous advances in communication systems which have given rise to the global proliferation of smartphones and other mobile communication systems. A signal processing system implements technical solutions for determining building footprints from inputs including signal data associated with mobile communication devices.

A system for determining a position of a receiver from as few as two or three transmitters. The receiver may be stationary or moving with a known velocity. The system includes a receiver clock having a clock bias and a clock drift relative to a reference clock and may also include a motion sensor. A decoder receives transmitted signals from a number of transmitters and determine pseudo-ranges and transmitter frequencies therefrom and a processing unit receives the pseudo-ranges, the transmitter frequencies and the receiver velocity and determines the position of the receiver therefrom. When only two transmitters are available, the position of the receiver is determined dependent upon a known receiver clock drift. The system may also determine clock bias and, when three or more transmitters are available, receiver clock drift. The processing unit uses ranging and Doppler equations in combination, and may also use a measured velocity.

A building management system and method for sensor time correction is described. The system comprises multiple sensors and an energy manager communicating with the sensors. The sensors, distributed within a particular area, provide multiple time measurements in response to detecting an object traversing among the sensors in which the time measurements are associated with unsynchronized time. The energy manager identifies a predicted time for traversing among the sensors based on one or more distances between pairs of sensors and an average velocity of the object to traverse among the sensors. The energy manager determines a sensor time error for each sensor by cross-correlating the time measurements with the predicted time.

A transceiver for a wireless communication system is configured to: communicate with at least one other transceiver of the system using a sidelink resource pool of the system; transmit signals on resources of the pool that are allocated to the transceiver on a period basis with equal length periods t.sub.periodA; transmit a first signal on a first resource of the resources allocated to the transceiver, and receive a second signal from another transceiver of the system on a second resource, the second signal being transmitted by the other transceiver responsive to a reception of the first signal, the second signal being transmitted by the other transceiver on the second resource using the period t.sub.periodA based on which the resources are allocated to the transceiver; determine a distance to the other transceiver based on a time t.sub.roundA between the transmission of the first signal and the reception of the second signal from the other transceiver, and based on the period t.sub.periodA based on which the resources are allocated to the transceiver.

Systems and methods for locating a position of a mobile device are provided. The system can include a plurality of anchors. Each anchor can be positioned at a fixed location. The plurality of anchors can be configured to communicate with one another and with the mobile device by transmitting data packets formatted according to a media access control (MAC) frame structure. The MAC frame structure can include a beacon period for synchronizing the plurality of anchors in the system via transmission of a first set of communication packets. The MAC frame structure can include a contention-free period. The MAC frame structure can include a contention period. The system can include a position estimator configured to estimate the position of the mobile device.