What is A-GPS technology and mobile applications

Although AGPS technology, high accuracy, the first GPS signal acquisition time is short, but the technology also exists some disadvantages. First, the indoor location problem has still not satisfactorily resolved. In addition, AGPS positioning must be achieved through multiple network transmission (up to six one-way transmission), which is considered operators occupy a lot of air resources. AGPS main problem is that the user positioning service for mobile phones to replace hard to accept. And AGPS mobile phone than the average power consumption to a certain extent on the additional burden of indirect cut short standby time. In addition, is the use of validity. Since GPS systems owned and controlled by the U.S. government, at a critical time (such as the Gulf War, the war on terror, etc.), civil GPS service may be affected, AGPS positioning it more difficult for the normal operation of the business. Currently, AGPS solution provider primarily Snaptrack Qualcomm and its subsidiary companies, and now only be used for CDMA and iDEN networks market in the near future will be for the GSM network positioning technologies.