A personal items network, comprising a plurality of items, each item having a wireless communications port for coupling in network with every other item, each item having a processor for determining if any other item in the network is no longer linked to the item, each item having an indicator for informing a user that an item has left the network, wherein a user may locate lost items. A method for locating lost personal items, comprising: linking at least two personal items together on a network; and depositing one or both of time and location information in an unlost item when one of the items is lost out of network.

A method is provided including receiving, by a user equipment connected to a serving cell of a wireless network, assistance data for performing measurements of positioning reference signals, wherein the assistance data comprises reference cell information for a reference cell, and neighbor cell information for one or more neighbor cells; in response to determining that the reference cell information comprises an indication that the user equipment is not to measure a positioning reference signal of the reference cell, selecting one of the neighbor cells as a new reference cell; and performing measurements of the positioning reference signals based on one or more of the remaining neighbor cells in the assistance data.

A method is provided including receiving, by a user equipment connected to a serving cell of a wireless network, assistance data for performing measurements of positioning reference signals, wherein the assistance data comprises reference cell information for a reference cell, and neighbor cell information for one or more neighbor cells; in response to determining that the reference cell information comprises an indication that the user equipment is not to measure a positioning reference signal of the reference cell, selecting one of the neighbor cells as a new reference cell; and performing measurements of the positioning reference signals based on one or more of the remaining neighbor cells in the assistance data.

An embodiment of the invention may include a method, computer program product and computer system for detecting a device. The embodiment may include a computing device that determines a Universally Unique Identifier (UUID) of a beacon of a second device. The computing device may determine a first location of the first device. The computing device may determine whether the UUID of the beacon of the second device matches a UUID in a list of UUIDs, where each UUID in the list of UUIDs corresponds to a beacon associated with a device. The computing device may transmitting the UUID of the beacon of the second device and the first location to a third device, based on determining the UUID of the beacon of the second device matches an entry in the list.

A navigation system featuring audio prompts including: a database including a plurality of beacon identifiers corresponding to physical beacons that are members of quadrants including one or more beacons, the database including navigation instructions between beacons in a quadrant and between beacons and adjacent quadrants; a controller adapted to: provide a first beacon and a destination beacon, determine a route from the first beacon to the destination beacon in a destination quadrant, provide, via the user interface, navigation instructions from the first beacon to a first quadrant of the route, for each quadrant along the route: receive, a newly encountered beacon identifier; and provide navigation instructions for the user to navigate from the newly encountered beacon to the next quadrant in the ordered list, and upon receiving a beacon identifier of a detected beacon in the destination quadrant, provide navigation instructions to navigate from the detected beacon to the destination beacon.

A navigation system featuring audio prompts including: a database including a plurality of beacon identifiers corresponding to physical beacons that are members of quadrants including one or more beacons, the database including navigation instructions between beacons in a quadrant and between beacons and adjacent quadrants; a controller adapted to: provide a first beacon and a destination beacon, determine a route from the first beacon to the destination beacon in a destination quadrant, provide, via the user interface, navigation instructions from the first beacon to a first quadrant of the route, for each quadrant along the route: receive, a newly encountered beacon identifier; and provide navigation instructions for the user to navigate from the newly encountered beacon to the next quadrant in the ordered list, and upon receiving a beacon identifier of a detected beacon in the destination quadrant, provide navigation instructions to navigate from the detected beacon to the destination beacon.

A system and method for signal backup of active DAS master unit are disclosed. The system includes a state detection unit, a backup processing unit and at least two power distribution units, wherein a backup signal output port and a plurality of backup access ports with a number great than or equal to that of the power distribution units are arranged on the backup processing unit, and a backup signal input port and a plurality of radio frequency access ports with a number great than or equal to that of the power distribution units are arranged on the state detection unit; and each power distribution unit has an input port coupled to one of a plurality of signal sources, and two output ports in which one is coupled to one radio frequency access port and the other is coupled to one backup access port, and the backup signal output port is coupled to the backup signal input port. The backup processing unit is configured to control a signal from the signal source coupled to the radio frequency access port which is in an accessing-abnormal state to access the backup signal input port, when any one of the plurality of radio frequency access ports is in the accessing-abnormal state. It can reduce the hardware cost while guarantee the reliability to improve the cost performance of the backup system.

A system and method for signal backup of active DAS master unit are disclosed. The system includes a state detection unit, a backup processing unit and at least two power distribution units, wherein a backup signal output port and a plurality of backup access ports with a number great than or equal to that of the power distribution units are arranged on the backup processing unit, and a backup signal input port and a plurality of radio frequency access ports with a number great than or equal to that of the power distribution units are arranged on the state detection unit; and each power distribution unit has an input port coupled to one of a plurality of signal sources, and two output ports in which one is coupled to one radio frequency access port and the other is coupled to one backup access port, and the backup signal output port is coupled to the backup signal input port. The backup processing unit is configured to control a signal from the signal source coupled to the radio frequency access port which is in an accessing-abnormal state to access the backup signal input port, when any one of the plurality of radio frequency access ports is in the accessing-abnormal state. It can reduce the hardware cost while guarantee the reliability to improve the cost performance of the backup system.

Technologies are generally described for identifying whether a propagation path between a mobile device and an access point is line-of-sight. In some examples, a method performed under control of a mobile device may include receiving, from an access point, a first signal transmitted at a first frequency band; receiving, from the access point, a second signal transmitted at a second frequency band; measuring a difference value between propagation properties of the first signal and the second signal; and identifying whether a propagation path between the mobile device and the access point is line-of-sight or non-line-of-sight based at least in part on the difference value.

Technologies are generally described for identifying whether a propagation path between a mobile device and an access point is line-of-sight. In some examples, a method performed under control of a mobile device may include receiving, from an access point, a first signal transmitted at a first frequency band; receiving, from the access point, a second signal transmitted at a second frequency band; measuring a difference value between propagation properties of the first signal and the second signal; and identifying whether a propagation path between the mobile device and the access point is line-of-sight or non-line-of-sight based at least in part on the difference value.