초록 ▼

A method and system for providing navigation services to portable communications devices, such as cellular phones. A cellular phone user uses a cellular phone to request navigation services. The cellular phone is located in a geographic area that has a cellular phone location determining system that

A method and system for providing navigation services to portable communications devices, such as cellular phones. A cellular phone user uses a cellular phone to request navigation services. The cellular phone is located in a geographic area that has a cellular phone location determining system that determines the positions of cellular phones used throughout the area. The cellular phone location determining system is used to determine one or more locations of the cellular phone used to request the navigation services. A map matching program uses a map database that contains data indicating the locations of roads located throughout the geographic area to relate the position of the cellular phone to one or more roads. Optionally, a direction of travel of the cellular phone can be determined by the map matching program using data indicating multiple positions of the cellular phone over time. Data indicating the position with respect to roads located in the geographic area of the cellular phone used to request the navigation services is combined with the request for navigation services at a navigation services server. The navigation services server determines a response to the request for navigation services taking into account the location and/or direction of travel of the cellular phone.

대표청구항 ▼

[ I claim:] [1.]1. A method of providing navigation services to a plurality of cellular phone users who are pedestrians comprising the steps of:using a cellular phone location determining system to determine geographic positions of a plurality of cellular phones that are used by pedestrians in a geo

[ I claim:] [1.]1. A method of providing navigation services to a plurality of cellular phone users who are pedestrians comprising the steps of:using a cellular phone location determining system to determine geographic positions of a plurality of cellular phones that are used by pedestrians in a geographic area;receiving requests for navigation services from said plurality of cellular phones;matching the positions of each of said plurality of cellular phones that are used by pedestrians to positions of roads represented by data in a geographic database;using said geographic database to determine responses to said requests for navigation services; andtransmitting said responses to said plurality of cellular phones that are used by pedestrians.