扩展阅读A few months ago millions of people in London heard alarms all over the town. The Emergency Services the Fire Departments the Police hospitals and ambulances stood by ready to go into action. In r

March 2007S. McCann D. Stephenson and V. GuptaSlide Emergency Services for IEEE 802TutorialEmergency Services for 802Date: 2007-03-13Authors:March 20071S. McCann D. Stephenson and V. GuptaContent