1. Cheng, Y.J., Wang, K., Jan, R.H., Chen, C., Huang, C.Y.: Efficient failover and load balancing for dependable SIP proxy servers. In: 2008 IEEE Symposium on Computers and Communications, pp. 1153–1158. IEEE (2008)
2. Jiang, H., Iyengar, A., Nahum, E., Segmuller, W., Tantawi, A.N., Wright, C.P.: Design, implementation, and performance of a load balancer for SIP server clusters. IEEE/ACM Trans. Netw. 20(4), 1190–1202 (2012)
3. Singh, K., Schulzrinne, H.: Failover, load sharing and server architecture in SIP telephony. Comput. Commun. 30(5), 927–942 (2007)
4. Blander, E., Peles, A.: Geographic resiliency and load balancing for SIP application services (2015). US Patent 9,143,558
5. Kambourakis, G., Geneiatakis, D., Gritzalis, S., Lambrinoudakis, C., Dagiuklas, T., Ehlert, S., Fiedler, J.: High availability for SIP: solutions and real-time measurement performance evaluation. Int. J. Disaster Recover. Bus. Contin. 1(1), 11–30 (2010)