Abstract: Provided are an erratic steering warning device, and a method for controlling an erratic steering warning, capable of suppressing unnecessary warning outputs. The erratic steering warning device includes: an erratic travel detecting unit for detecting erratic travel of a vehicle; and a warning output control unit which, if erratic travel has been detected, does not cause a warning to be output from a warning output unit if control is being executed to prevent the vehicle deviating from a lane, and a driver is not touching a steering operation unit that accepts a vehicle steering operation.

Abstract: Disclosed is a notification device that reduces notifications which an occupant would find irritating. This notification device comprises: a notification unit that detects an object approaching a vehicle, and notifies an occupant of the approach of the object; and a notification control unit that is connected to a wiper of the vehicle, determines the quantity of water present in the vehicle surroundings on the basis of a wiper operation quantity, and when the quantity of water is greater than a prescribed threshold value, controls the notification unit such that the degree of notification is suppressed compared to when the quantity of water is less than or equal to the threshold value.

Abstract: A location support relating to a mobile station that can make use of multiple communication networks more efficiently. In an SUPL server of a location system, a judgment is made as to which of two communication networks is accessed by a mobile station based on information specifying the access point of the mobile station, with this access point being notified from the mobile station, whereby the information is then notified from the SUPL server to a location information management device. As a result, in the location information management device, requests to a communication network, which is not accessed by the mobile station, for location information for use in location of the mobile station are suppressed. This makes it possible for location support relating to a mobile station capable of using multiple communication networks to be carried out more efficiently.

Abstract: A location support relating to a mobile station that can make use of multiple communication networks more efficiently. In an SUPL server of a location system, a judgment is made as to which of two communication networks is accessed by a mobile station based on information specifying the access point of the mobile station, with this access point being notified from the mobile station, whereby the information is then notified from the SUPL server to a location information management device. As a result, in the location information management device, requests to a communication network, which is not accessed by the mobile station, for location information for use in location of the mobile station are suppressed. This makes it possible for location support relating to a mobile station capable of using multiple communication networks to be carried out more efficiently.

Abstract: Provided is a positioning support device that provides approximate location information including more appropriate error radius information. With a positioning method (positioning support method) by a positioning support system 10 and a positioning system 1 including the positioning support system 10, it is determined in a SUPL server 20 whether an error radius included in location information (approximate location information) of a base station device 70 acquired from a mobile communication network N2 that is another communication network falls within a prescribed range. If out of the prescribed range, the error radius is updated to a predetermined value, and approximate location information including the updated error radius information is thereafter transmitted to a mobile station 60 for positioning computation. This makes it possible to provide approximate location information including more appropriate error radius information for positioning computation.