K.-H. Krempels

Bio: K.-H. Krempels is an academic researcher from RWTH Aachen University. The author has contributed to research in topics: Hybrid positioning system & Precise Point Positioning. The author has an hindex of 1, co-authored 1 publications receiving 16 citations.

Directory-less indoor positioning for WLAN infrastructures extended abstract

Abstract: Existing positioning approaches do not provide the required positioning accuracy for navigation systems in indoor environments. Novel approaches are based on pseudolites (pseudo satellites) which try to emulate GPS (Global Positioning System) satellites. Thus, conventional GPS receivers could be used, but the infrastructure becomes very expensive. Other approaches are based on tagged WLAN access points or GSM (Global System for Mobile Communication) base stations with a central tag directory. When a user wants to determine its position, he queries the central server for the geo coordinate of its current access point or base station. Finally, the server delivers the corresponding coordinate. In this paper we present a directory-less approach based on broadcasted geo tags for positioning in existing WLAN infrastructures.

Method providing positioning and navigation inside large buildings

Abstract: Positioning and/or navigation of an electronic device within a building when GPS signals are unavailable is provided. The electronic device scans for available Wireless Local Area Network (WLAN) Access Points (APs) upon, e.g., entering a building. The electronic device detects a signal (e.g., beacon) from at least one available WLAN AP, whereupon the electronic device retrieves the indoor location of the available WLAN AP. The location information can be directly downloaded from the WLAN AP while in state-1 via, e.g., a Native Query Protocol which includes an extension to currently defined Native Query info elements that returns location information. Alternatively, the Media Access Control (MAC) address of the WLAN AP can be read from the beacon signal, which is then used to retrieve the location of the WLAN AP from an associated database. Additionally, various embodiments may be implemented with or via a mapping application or service, where the mapping application is able to display any floor's floor plan of a building and determine/obtain the position of the electronic device inside the building relative to the floor plan.

Apparatuses, systems, and methods for determining location of a mobile device(s) in a distributed antenna system(s)

Abstract: Distributed antenna systems provide location information for client devices communicating with remote antenna units. The location information can be used to determine the location of the client devices relative to the remote antenna unit(s) with which the client devices are communicating. A location processing unit (LPU) includes a control system configured to receive uplink radio frequency (RF) signals communicated by client devices and determines the signal strengths of the uplink RF signals. The control system also determines which antenna unit is receiving uplink RF signals from the device having the greatest signal strength.

Location tracking using fiber optic array cables and related systems and methods

Abstract: Fiber optic array cables and related systems and methods to determine and/or track locations of objects are disclosed. The fiber optic array cables can be employed in an optical-fiber-based communication system, including a centralized optical-fiber based communication system. In one embodiment, the fiber optic array cable is configured to carry optical RF or radio-over-fiber (RoF) signals to establish communications with objects. The fiber optic array cable includes multiple reference units along the length of the cable. The reference units can be configured to convert received optical RF signals into electrical RF signals to establish RF communications with objects capable of receiving electrical RF signals. The reference units are also configured to convert received electrical RF signals from the objects into optical RF signals, which are then used to determine the location of the object. Having the availability of the multiple reference units on one or more the fiber optic array cables can provide enhanced reliability in tracking objects.

Localization services in optical fiber-based distributed communications components and systems, and related methods

Abstract: Optical fiber-based distributed communications components and systems, and related methods to provide localization services for client devices are disclosed. The localization services allow the providing and/or determination of the location of client devices in communication with a component or components of the optical fiber-based distributed communications system. The location of client devices can be provided and/or determined based on knowledge of the location of the component or components in the optical fiber-based distributed communications system in communication with the client device. This information can be used to determine or provide a more precise area of location or area of location for client devices. The optical fiber-based distributed communications components and systems, and related methods disclosed herein may be well-suited for indoor environments where other methods of providing and/or determining location of client devices may be obstructed or not possible due to the indoor environment.

Systems, methods, and devices for documenting a location of installed equipment

Abstract: A system, and related methods and devices, is disclosed for documenting a location of installed equipment. The system includes a mobile reader and a memory. The mobile reader is configured to read a unique identification of an equipment unit and to determine a location of the equipment unit while proximate the equipment unit. The location and the unique identification of the equipment unit is associated and stored in the memory. The memory may be located in the mobile reader or in a remotely located database. The mobile reader may be an optical reader configured to read the unique identification from an optical barcode associated with the equipment unit, or the mobile reader may be an RFID reader configured to read the unique identification from an RFID tag associated with the equipment unit.