[IEEE 2013 3rd International Conference on Instrumentation, Communications, Information Technology, and Biomedical Engineering (ICICI-BME) - Bandung, Indonesia (2013.11.7-2013.11.8)] 2013 3rd International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering (ICICI-BME) - Retransmission issue of SIP session over UDP transport protocol in IP Multimedia Subsystem - IMS