Question: In E-UTRAN, when utilizing motion sensor positioning in a hybrid approach for User Equipment (UE) location estimation, which of the following is a primary role of the one or more motion sensors employed by the UE?
Option 1: To directly compute the precise geographical coordinates of the UE.
Option 2: To provide cell ID information to support location estimation.
Option 3: To facilitate communication with the E-UTRAN base station for positioning.
Option 4: To supply movement information, including displacement results at a series of points, enhancing accuracy when combined with other positioning methods.
Explanation: In the context of hybrid motion sensor positioning in E-UTRAN, the primary function of the UE's motion sensors is to provide detailed movement information. This includes displacement data calculated over time at multiple points, which, when combined with other positioning techniques (in a hybrid approach), significantly improves the accuracy of the UE's estimated location.