A message is transmitted from a networked GPS time server to a mobile station, the message includes GPS referenced time information indicating an elapsed GPS referenced time interval at the networked GPS time server between receiving a request for GPS time assistance at the networked GPS time server...http://www.google.com/patents/US7228138?utm_source=gb-gplus-sharePatent US7228138 - Methods, servers, mobile stations, and computer program products using GPS referenced time and delay information in messages for GPS time assistance
