| 摘要 |
A radio map consists of lists of positions of base stations and/or access points (AP) in geographic areas which allow mobile devices to determine their position. As the number of APs increases it is desirable to only include the most significant in a radio map. To determine the most significant access points a first plurality of lists of APs is received a first AP which is comprised in a highest number of lists in the plurality of APs is determined. A second plurality of lists, which comprises of lists of APs from the first plurality of lists with those containing the first AP removed, is formed. The receiver then determines a second AP which is in a highest number of lists in the second plurality of lists. A significance flag for the first and second AP is then set and only the significant APs are used to create a radio map. |
