Disclosed herein is a method and system to help reduce latency in responding to a location based service request from a mobile station. According to the method, the mobile station will include base station delay measurements with the location based service request. That way, when a network entity (such as the location based service provider, or a proxy between the mobile station and the location based service provider) receives the mobile station's request for a location-based service, the entity may readily convey the provided base station delay measurements to the positioning system to enable the positioning system to triangulate the mobile station's location without the need to request the base station delay measurements from the mobile station.