Method of determining location

摘要

A method for determining a location of a mobile apparatus based on the presence of wireless access point signals. The received wireless signal strength from a plurality of observed wireless access points is compared with profiles each relevant to a different user context and containing a plurality of previously registered wireless access point signal strengths around a previously registered location. The location of the mobile apparatus is determined based on the profile most closely matching the collection of observed wireless access points. Wireless access points present in the profile but not observed are ignoring during the matching process.

主权项

1. A method of determining the location of a mobile apparatus, the mobile apparatus having a wireless network interface and a data store the method comprising:
searching for wireless access point devices and storing any located wireless access points as a located set of wireless access point devices, in the data store; accessing at least one profile stored in the data store, the at least one profile relating to a pre-registered user context and containing data corresponding to a plurality of wireless access point devices associated with said pre-registered user context; matching the profile, or matching each profile, against the located set of wireless access point devices located in the searching step; and outputting the pre-registered user context if the degree of correspondence between the located set of wireless access point devices and the at least one profile is above a threshold,wherein
the at least one profile contains at least two different groups of wireless access points, each group being located in a different geographical location and associated with the same user context; and any wireless access point devices which are present in the at least one profile but not present in the located set of wireless access point devices are ignored during the matching step.