CommScope ::: Andrew ::: Product/Location Systems/WiMAX Location

Andrew can supply positioning technologies to locate mobiles connected to WiMAX networks. These positioning technologies, including A-GPS, Cell ID, and proprietary Multi-lateration techniques are supplied over location services architectures that conform to the specifications of the WiMAX LBS forum and the NENA i2/i3 architectural recommendations.

Andrew’s WiMAX Location Servers can support a wide variety of commercial location-based services, as well as VoIP emergency calling.

GeoLENs™ WiMAX System Features

WiMAX Location Server Conformant to WiMAX LBS Forum Architectural Definitions Support for...

GeoLENs™ WiMAX Location Methods

GeoLENs™ WiMAX Location Methods: A-GPS based positioning Hybrid A-GPS Positioning Assisted-GPS (A-GPS) is a handset-base...

GeoLENs™ WiMAX Location Methods:

A-GPS based positioning

Hybrid A-GPS Positioning

Assisted-GPS (A-GPS) is a handset-based mobile locating method fundamentally based on GPS locating technology but functionally distributed between the mobile and a centralized server. Mobiles must be specially equipped to receive GPS signals from multiple GPS satellites in order to make measurements of the signals from GPS satellites and relay this information or their calculated position through the mobile network to the SMLC/SAS/SLP software (iSAS: Control Plane, SUPL: User Plane implementations). In cases where the mobile does not compute its own location from GPS data, the SMLC/SAS/SLP uses GPS data relayed from the target mobile to compute the mobile's position. Once determined, the position can be sent to a gateway mobile location center (GMLC) or SUPL Location Platform (SLP) for distribution to the application that originated the location request. A-GPS is a supplemental form of GPS whereby GPS satellite position data is sent from the SMLC/SAS/SLP through the mobile network to the mobile to assist the mobile in determining which GPS satellites it should attempt to acquire. This supplemental data is intended to:

Speed the mobile's satellite signal acquisition process.
Increase the mobile's ability to receive signals from the target GPS satellites.

A-GPS is intended to reduce latency and improve other location performance when a mobile's view of GPS satellites is obscured. That can occur when the caller is in a building, in a vehicle, or in an "urban canyon." Although A-GPS does improve overall locating performance, accuracy, latency, and yield performance can be subject to degradation if a mobile's view of GPS satellites is obscured.

Cell ID Positioning:

Allows basic location services to be deployed using existing handsets and network capabilities and kick start market interest and revenues.

Cell sector location coordinates passed to the application
Can be accomplished using a standalone Gateway Mobile Location Center (GMLC) that connects to MSC and HLR using ATI
SMLC based when deployed
Can be configured to provide mid point of the cell if desired

O-TDOA Location Solutions:

Mobile makes timing measurements on the downlink
Measurements reported to location server
Timing measurements may be augmented with other types of measurements such as Round Trip Delays
Location Server computes fix with a knowledge of timing measurements and base station locations.

Multi-lateration:

Uses mobile scanning reports
Mobile makes Observed Time Different (OTD) timing measurement on the downlink signal from the base station to the handset
Multiple measurements of signal from different base stations are made by the handset
Radio network computes Round Trip Delay (RTD)
OTD and RTP measurements passed to the Location Server
Location Server computes location fix.