Wireless Sensor Networks are being deployed in industrial application which requires routing path that can delivery sensed data in reliable, energy efficient and low end-to-end delay. A velocity based protocol proposed in [13] co-relates velocity offered by two hop neighbor to required delay of application and determines successor node in path to sensed data toward sink. However, velocity based protocol have more control packets overhead. We propose a Real-Time Reliable Data delivery based on Virtual Coordinates Routing (RRDVCR) protocol, which uses the hop count between source and destination instead of geographic distance. Further, process of finding forwarding node is on advancement of packet offered by node�s two-hop neighbor, success probability of link and residual energy at the two-hop neighbor nodes, the data packets are serviced depending on their real-time requirements. To provide differentiated services to each packet, packet progress, link quality and residual energy parameters are co-related by co-relation factor. To reduce control overhead selective acknowledgment scheme is used in proposed protocol. Simulation results of proposed protocol demonstrate that decrease in energy utilization is about 22% and 9.5% in comparison to SPEED [8] and THVR [13] protocol, packet success delivery is about 16% and 38% increase in comparison to THVR [13] and SPEED [8] protocol, and control overhead in proposed protocol is 50% less than THVR[13].

Link Reliability, Maximum Transmission Count [MTX], Virtual Coordinating Routing, Dynamic Co-relation Factor: f(rt).

[1] Jung J, Park S, Lee E, Oh S, Kim SH �OMLRP: Multi-hop Information Based Real-time Routing Protocol in Wireless Sensor Networks,� IEEE Wireless Communications and Networking Conference (WCNC), pp. 1-6, 2010.
[2] Y. Li, C. S. Chen, Y.-Q. Song, Z. Wang, and Y. Sun �A Two-Hop Based Real-Time Routing Protocol for Wireless Sensor Networks,� in Proceedings. IEEE WFCS, pp. 65-74 May 2008.
[3] K. S. Prabh and T. F. Abdelzaher �On Scheduling and Real-Time Capacity of Hexagonal Wireless Sensor Networks,� in Proceedings. ECRTS, pp. 136-145, 2007.
[4] J. Polastre, J. Hill, and D. Culler, �Versatile Low Power Media Access for Wireless Sensor Networks� in Proceedings ACM SenSys, pp. 95-107, 2004.
[5] M. A. Spohn and J. J. Garcia-Luna-Aceves, �Enhancing Broadcast Operations in Adhoc Networks with Two-Hop Connected Dominating Sets,� in Proceedings. IEEE MASS, pp. 543-545, 2004.
[6] V. Rajendran, K. Obraczka1, and J. J. Garcia-Luna-Aceves, �Energyefficient, Collision-free Medium Access Control for Wireless Sensor Networks� IEEE Transactions on Mobile Computing, Wireless Networks, vol. 12, no. 1, pp. 63-78, Feb. 2006.
[7] Umesh Kumar Singh, Shivlal Mewada, Lokesh Laddhani and Kamal Bunkar, �An Overview & Study of Security Issues in Mobile Ado Networks�, International Journal of Computer Science and Information Security (IJCSIS) USA, Vol-9, No.4, pp (106-111), April 2011.
[8] T.He,J.Stankovic, T.Abdelzahar, and C. Lu, �A Spatiotemporal Communication Protocol for Wireless Sensor Networks� IEEE Transaction on Parallel Distributed System, vol. 16, no. 10, pp. 995-1006, October 2005.
[9] Payel Ray, Ranjan Kumar Mondal, Debabrata Sarddar, "Efficient Path Reconstruction for Wireless Sensor Network", International Journal of Computer Sciences and Engineering, Volume-04, Issue-05, Page No (140-146), May -2016
[10] Sujata Agrawal, K.D. Kulat and M. B.Daigavane, "Evaluation of Routing Algorithm for Ad-hoc and Wireless Sensor Network Protocol", International Journal of Computer Sciences and Engineering, Volume-01, Issue-02, Page No (11-18), Oct -2013
[11] E. Felemban, C. G. Lee, and E. Ekici, �MMSPEED: Multipath MultiSPEED Protocol for QoS Guarantee of Reliability and Timeliness in Wireless Sensor Networks� IEEE Transactions on Mobile Computing, vol. 5, no. 6, pp. 738-754, June 2006.
[12] O. Chipara, Z. He, G. Xing,Q. Chen, X. Wang, C. Lu, J. Stankovic, and T. Abdelzaher, �Real-time Power-aware Routing in Sensor Networks� in Proceedings 14th IEEE International Workshop Quality Service, pp. 83-92, June 2006.
[13] Yanjun Li, Chung Shue Chen,Ye-Qiong Song, Zhi Wang, Member and Youxian Sun, �Enhancing Real-Time Delivery in Wireless Sensor Networks With Two-Hop Information,� IEEE Transactions on Industrial Informatics, vol. 5, no. 2, pp 113-122, May 2009.
[14] B. Nefzi and Y.-Q. Song, �Performance Analysis and Improvement of Zigbee Routing Protocol,� in Proceedings IFAC FET, pp. 199-206, November 2007.
[15] R.Nathiya and S.G.Santhi, "Energy Efficient Routing with Mobile Collector in Wireless Sensor Networks (WSNs)", International Journal of Computer Sciences and Engineering, Volume-02, Issue-02, Page No (36-43), Feb -2014
[16] N. Boughanmi and Y.-Q. Song, �A New Routing Metric for Satisfying Both Energy and Delay Constraints in Wireless Sensor Networks� Journal on Signal Processing System, vol. 51, no. 2, pp. 137-143, 2008.
[17] K. Akkaya and M. Younis, �An Energy-aware QoS Routing Protocol for Wireless Sensor Networks� in Proceedings ICDCS, pp. 710-715, May 2003.
[18] Shamneesh Sharma, Dinesh Kumar and Keshav Kishore, "Wireless Sensor Networks- A Review on Topologies and Node Architecture", International Journal of Computer Sciences and Engineering, Volume-01, Issue-02, Page No (19-25), Oct -2013
[19] Pham Tran Anh Quang and Dong-Sung Kim, �Enhancing Real-Time Delivery of Gradient Routing for Industrial Wireless Sensor Networks� IEEE Transaction on Industrial Informatics., vol. 8, no. 1, pp. 61-68, February 2012.
[20] Jianwei Niu,Long Cheng, Yu Gu, Lei Shu and Sajal K. Das, �R3E: Reliable Reactive Routing Enhancement for Wireless Sensor Networks� IEEE Transaction on Industrial Informatics, vol. 10, no. 1, pp. 784-794, 2013.
[21] Pradeep Sharma, Shivlal Mewada and Aruna Bilavariya, "Group Rekeying Management Scheme for Mobile Ad-hoc Network", International Journal of Scientific Research in Network Security and Communication, Volume-01, Issue-05, pp (5-12), Nov -Dec 2013..
[22] Fariborz Entezami, Martin Tunnicliffe, and Christos Politis, �Find the Weakest Link� IEEE Vehicular Technology Magazine, pp. 28-38, September 2014.
[23] J. Jung, S. Park, E. Lee, S. Oh, and S. H. Kim, �OMLRP: Multihop Information Based Real-time Routing Protocol in Wireless Sensor Networks� in Proceedings of IEEE Wireless Communication Network Conference, pp. 1-6 April 2010.
[24] Crossbow Motes, [Online]. Available: http://www.xbow.com.
[25] NS-2,[Online].Available: http://www.isi.edu/nsnam/ns/