Count Down time (CDT) is of crucial importance during launch of flight vehicles like Missile, UAVs in a test Range. A Remote tracking station is not able to know about status of Count Down activities without seeing CDT. Conventional CDT systems are hardware based. These systems are bulky, costly and very difficult to reconfigure. This paper discusses about software based Count down Time generator application which can run on any desktop or laptop. This application is GUI based which takes inputs from the users and generates the Countdown Time. The generated CDT is transmitted into the network using multicast technology which is received and displayed by Multicast CDT Readers deployed over the network. As this application is completely software based hence it can be configured to run on any of the Desktops or laptops which are easily portable. As delay and time jumps are crucial issues in Range Timing hence special mechanism are applied to address them.

1. Lin, John C. , and Sanjoy Paul. "RMTP: A reliable multicast transport protocol. " INFOCOM'96. Fifteenth Annual Joint Conference of the IEEE Computer Societies. Networking the Next Generation. Proceedings IEEE. Vol. 3. IEEE, 1996.
2. Castro, Miguel, et al. "SCRIBE: A large-scale and decen tralized application-level multicast infrastructure. " Selected Areas in Communications, IEEE Journal on 20. 8 (2002): 1489-1499.
3. Szymaniak, Michal, Guillaume Pierre, and Maarten van Steen. "Versatile anycasting with mobile IPv6. " Proceed ings of the 2nd international workshop on Advanced archi tectures and algorithms for internet delivery and applications. ACM, 2006.
4. Walkowiak, Krzysztof. "Anycasting in connection-oriented computer networks: Models, algorithms and results. " International Journal of Applied Mathematics and Computer Science 20. 1 (2010): 207-220.
5. Blanchette, Jasmin, and Mark Summerfield. C++ GUI programming with Qt 4. Prentice Hall Professional, 2006.
6. Xue, Ming, and Changjun Zhu. "The socket programming and software design for communication based on client/server. " Circuits, Communications and Systems, 2009. PACCS'09. Pacific-Asia Conference on. IEEE, 2009.
7. . Law, KL Eddie, and Roy Leung. "A design and implement tation of active network socket programming. " Microprocessors and Microsystems 27. 5 (2003): 277-284.
8. Stevens, W. Richard, Bill Fenner, and Andrew M. Rudoff. UNIX network programming. Vol. 1. Addison-Wesley Professional, 2004.
9. Shneiderman, Ben, and Shneiderman Ben. Designing the user interface. Pearson Education India, 2003.
10. Tang, Poi Loon, and Clarence W. De Silva. "Compensation for transmission delays in an ethernet-based control network using variable-horizon predictive control. " Control Systems Technology, IEEE Transactions on 14. 4 (2006): 707-718.
11. Wu, Chengjie, et al. "Analysis of EDF scheduling for wire less sensor-actuator networks. " Quality of Service (IWQoS), 2014 IEEE 22nd International Symposium of. IEEE, 2014.

Range Timing Application Level Multicasting Socket Programming Count Down Time Gui Design In Qt.