BlueSky Positioning says that it has carried out trials of its SIM card based A-GPS system on the Estonian mobile network, EMT. The tests were conducted using both GPRS and USSD (Unstructured Supplementary Services Data) for retrieving assistance data in a live 3G network.
BlueSky Positioning's A-GPS technology is completely embedded into a phone's SIM card.
EMT Estonia is the first network operator to test a USSD connection for assistance data, allowing BlueSky Positioning's A-GPS solution to be used with ordinary mobile phones, even if the model does not support GPRS. Using USSD brings with it a number of benefits such as the ability to be used concurrently with a voice call. Retrieving assistance data during a call is particularly important when making an emergency call, allowing the caller to be located accurately and quickly.
Future testing will cover a wider range of handsets and scenarios including various weather conditions, in urban and rural landscapes and using entry level handsets and smartphones. Running parallel to this testing, new services and business models will be finalised in readiness for a mass market launch by EMT.
"Our preliminary test results with A-GPS in-SIM technology have demonstrated compelling accuracy coupled with a fast TTFF (time-to-first-fix), comparable to any commercial A-GPS handsets in the market. A-GPS SIM technology opens up a whole range of possibilities for both EMT and its subscribers," said Argo Kivilo, R&D Manager at EMT.
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