News Release from: Racal Instruments Wireless Solutions
Edited by the Electronicstalk Editorial Team on 29 October 2002
Position location compliance test for CDMA mobiles
Racal Instruments has delivered the first commercially available test system to allow manufacturers to test the position location technology of CDMA mobile phones.
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Racal Instruments has delivered the first commercially available test system to allow manufacturers to test the position location technology of CDMA mobile phones to ensure it meets the specifications laid down in the relevant 3GPP2 standard. The FCC has stated that by end of December 2005 95% of all handsets sold must be location capable. There are two aspects of location-based services: the first is the ability of rescue workers to be able to pinpoint a mobile user to within 50m in an emergency situation such as a car accident; the second is the network operators' belief that there will be a huge demand for the commercial applications of position location technology which is currently being predicted as a $20 billion market within the next five years.
The position location minimum performance test case software runs on Racal's 1X-AIME test platform and is for mobile handsets using advanced forward link trilateration (AFLT) positioning methods as well as A-GPS (assisted GPS).
AFLT is a mobile-based technique where a mobile takes measurements on signals from several serving basestations and reports them back to the network.
Positioning is achieved through timing the signals from the basestations.
An advantage of using the AFLT technique is that operators don't have to modify their basestations and in the race to meet the already extended E-911 (emergency service location) mandate deadline manufacturers will be anxious to test their mobile handsets sooner rather than later.
Racal's test system allows manufacturers to perform the lab-based Minimum Performance tests necessary to evaluate a handset's ability to perform accurate position measurements using both AGPS and AFLT and report them back correctly to the network.
Minimum Performance tests define baseline procedures for lab-based mobile evaluation in a cabled environment.
Operators have also defined over-the-air field tests that will verify a mobile's performance in typical environments such as shopping malls with obscured views of the GPS satellite constellations, and rural areas where there are fewer basestations.
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