This application claims the benefit of and priority to U.S. Provisional Application Ser. No. 61/718,894, filed 26 Oct. 2012. The entire contents of said U.S. Provisional application are incorporated herein by reference.
The present disclosure relates generally to wireless communication networks and in particular to networks and devices performing positioning of devices based on measurements of radio transmissions.
The development of technologies to determine the position of a mobile device has enabled application developers and wireless network operators to provide location-based and location-aware services. Examples of these are guiding systems, shopping assistance, friend finder, presence services, community and communication services and other information services that give the mobile user information about his or her surroundings or that use this information to enhance their services.
In addition to the commercial services facilitated by these technologies, location-based emergency services are also being deployed. The governments in several countries have put specific requirements on the network operators to be able to determine the position of an emergency call. For instance, governmental requirements in the United States specify that mobile networks must be able to determine the position of a certain percentage of all emergency calls and further include accuracy requirements. The requirements make no distinctions between indoor and outdoor environments.