GPS Blog

Tuesday, March 08, 2011

CellGuide and Rx Networks demonstrated its new XYBRID RT at the MWC

Rx Networks GPStream and XYBRID solutions are integrated with CellGuide's GPSense location engine, which supports CellGuide's ACLYS GPS chip or CGsnap GPS IP baseband.Within the integrated solution, the Rx Networks suite provides both assisted services for the GPS technology and complementary hybrid location technology for WiFi and Cellular-based devices.Based on high-resolution, worldwide digital elevation mapping, HiMap helps as an additional beacon for better navigation accuracy with four or more received satellites, and true 3D navigation with three received satellites.HiMap is now being made commercially available for CellGuide's ACLYS chip, ACLYS IP Core, and GPSense engine.

HiMap greatly improves GNSS navigation performance in urban canyons. City skylines create extremely demanding operational conditions for GPS receivers. Because of this, line-of-sight blockages and erroneous measurements adversely affect the accuracy of GNSS device positioning, tracking and navigation. Using CellGuide's HiMap technology, it boosts GNSS receiver accuracy and availability in built-up areas.HiMap is also available for licensing as an add-on to GNSS receiver manufacturers.

At the Mobile World Congress, Rx Networks demonstrated its new XYBRID RT version 1.0 real time hybrid positioning service that leverages Wi-Fi, Cellular and Assisted-GPS technologies.Designed for use in mobile devices, Global Navigation Satellite System (GNSS) chipsets as well as location applications, XYBRID RT helps determine optimal device location at places where satellite-based navigation falls short. Mobile operators can also leverage the service as a direct positioning solution both for their home networks and LBS roaming.

With the help of a simple HTTP interface, XYBRID RT works comfortably with any application or device form factor, while showing seamless integration with several GNSS chipsets that further improves Time-To-First-Fix.

The device identifies and lists all the detected Wi-Fi access points and cell towers and sends it to the RT server, which in turn analyzes this information to respond with an estimated position along with satellite orbit assistance data, thus enabling GNSS chipsets to acquire precise location. With this hybrid assistance, signal acquisition is significantly accelerated along with improved GNSS receiver sensitivity across both indoor and dense urban locations.

CellGuide, a host based GNSS solution provider, and Rx Networks, a mobile positioning-assistance technology company, are collaborating on delivering multi beacon, hybrid and assisted-GPS technologies.Officials with CellGuide said that both the companies will work to bring to market a solution comprising of the company’s GPSense Multi Beacon Engine and Rx Networks' suite of location assistance products.Using the hybrid service, end-user mobile location experience can be improved considerably with the accelerated three to five second determination of device location.

XYBRID RT, accessed through a simple HTTP interface, can work with any application or device form factor. When a location is required, the device submits a list of currently detected Wi-Fi access points and cell towers to the XYBRID RT server. The server responds with an estimated position based on these observations as well as with satellite orbit assistance data (ephemeris) to help the GNSS chipsets quickly acquire a precise location. This hybrid assistance accelerates signal acquisition and improves GNSS receiver sensitivity in challenging areas, including indoor and dense urban locations. A device’s location can be closely determined within 3 to 5 seconds while the solution rapidly converges to GPS-level accuracy, improving the end-user mobile location experience.

XYBRID RT operates in an anonymous manner without exposing the identity of individual devices. This ensures privacy for both individuals and security-sensitive Mobile Resources Management (MRM) and Machine-to-Machine (M2M) applications. The XYBRID RT service includes real-time satellite ephemeris from Rx Networks’ proven GPStream GRN Global Reference Network, a worldwide grid of GNSS reference stations with highly redundant, real-time views of multiple satellite constellations. The XYBRID RT service is built from the same carrier-grade (99.999% availability) network that Rx Networks’ customers rely upon for E-911 and other priority services.

GPStream GRN provides global real-time and long-term prediction GPS/GLONASS reference data for use by any mobile network location server. GPStream PGPS adds GPS and GLONASS extended ephemeris support to increase the sensitivity and acquisition speed of any GNSS chipset, while XYBRID RT and XYBRID SUPL LE combine Wi-Fi/Cell positioning with real-time A-GPS/A-GLONASS support to extend the location performance of GNSS chips in difficult areas, such as indoors or urban cores.

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