Method of determining a position of a plurality of mobile network devices relative to a plurality of reference network devices, wherein the plurality of mobile network devices and the plurality of reference network devices communicate with one another over a wireless channel and access the wireless channel according to an access policy comprising a sequence of time frames, wherein each time frame of the sequence comprises a plurality of portions reserved for communicating messages relating to different time-of-flight (ToF) computation methods, each of the different ToF computation methods allowing for determining a position of at least one of the plurality of mobile network devices. A positioning system implements the above method.

A wireless communication method for use in a user terminal comprises receiving, from a network entity or a first wireless network node, prior channel information related to at least one channel between each of at least one wireless terminal and each of at least one second wireless network node, and determining at least one characteristic of the user terminal based on the prior channel information.

A communication device includes: a plurality of wireless communication units configured to perform wireless communication with another communication device; and a control unit configured to identify position information indicating a position at which the other communication device is located on the basis of at least three distance measurement results indicating a distance between each of at least three wireless communication units and the other communication device obtained in accordance with a result of wireless communication performed by each of the at least three wireless communication units among the plurality of wireless communication units.

An automatic wall climbing type radar photoelectric robot system for damages of a bridge and tunnel structure, mainly including a control terminal, a wall climbing robot and a server. The wall climbing robot generates a reverse thrust by rotor systems, moves flexibly against the surface of a rough bridge and tunnel structure by adopting an omnidirectional wheel technology, and during inspection by the wall climbing robot, bridges and tunnels do not need to be closed, and the traffic is not affected. Bridges and tunnels can divide into different working regions only by arranging a plurality of UWB base stations, charging and data receiving devices on the bridge and tunnel structure by means of UWB localization, laser SLAM and IMU navigation technologies, a plurality of wall climbing robots supported to work at the same time, automatic path planning and automatic obstacle avoidance realized, and unattended regular automatic patrolling can be realized.

Presented are intelligent electronic footwear and apparel with controller-automated features, methods for making/operating such footwear and apparel, and control systems for executing automated features of such footwear and apparel. A method for operating an intelligent electronic shoe (IES) includes receiving, e.g., via a controller through a wireless communications device from a GPS satellite service, location data of a user. The controller also receives, e.g., from a backend server-class computer or other remote computing node, location data for a target object or site, such as a virtual shoe hidden at a virtual spot. The controller retrieves or predicts path plan data including a derived route for traversing from the user's location to the target's location within a geographic area. The controller then transmits command signals to a navigation alert system mounted to the IES's shoe structure to output visual, audio, and/or tactile cues that guide the user along the derived route.

A system and a method for operating a lighting device may include a transmission device and an optional communication unit. The transmission device may be configured to wirelessly transmit a radio signal with identification data specific to the transmission device of the lighting device via at least two radio channels. The transmitted radio signal transmitted via a respective one of the at least two channels may include channel data with respect to the respective one of the radio channels. In a non-limiting embodiment, the transmission device is a beacon.

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.

A location system provides a location service for determining a location of a mobile device. A node of the location system comprises: a signal processing module, and a wireless interface which communicates wirelessly according to a standardized wireless networking protocol. The protocol defines a request message for sending a request from the mobile device to the node, the request message having a network ID field for specifying a network to which the request is directed. The wireless interface receives, from the mobile device, an instance of the request message including an ID of the location service, this being carried in the network ID field. The signal processing module detects the ID of the location service in this field, and in response captures a measurement of the received instance of the request, for use in determining the location of the mobile device in conjunction with measurements from other nodes.

Examples disclosed herein relate to determining a scale associated with received signal strength indicators (RSSIs). In one example, a computing device receives access point (AP) RSSIs. The RSSIs are determined at APs. The APs are associated with coordinate information. In one example, records are maintained for AP reference pairs. Each AP RSSI can be determined at one AP with reference to another AP. In one example, the computing device determines a scale associated with each record.

To determine a location of a client device in a wireless network having at least first and second network devices, with known locations, one of the network devices transmits a message to the other network device and the other network device responds with an acknowledgement message. A client device receives the message and the acknowledgement message as well as respective times indicating actual times at which the message and the acknowledgement message were processed by one of the first and second network devices. The client device determines its location based on the times at which it received the message and the acknowledgement message and the difference between the actual processing times. This location may be refined by determining an angle between the client device and at least one of the network devices having multiple antennas and being configured for steered beam communications.