#Sip definition electronic records how to#

Complete monitoring, including cross-protocol data analysis of VoLTE control is a key issue that currently in the operators’ interest. In reality the 2G and 3G mobile cores get involved as well, when 4G coverage is not satisfactory, and SRVCC (Single Radio Voice Call Continuity) procedures kick in. In theory it merely requires the interworking of the EPC (Evolved Packet Core) of LTE and the IMS (IP Multimedia Subsystem) for call control. The practical situation for cellular mobile networks and their services are especially troublesome, since there are three generations of mobile networks working together, and services are provided across these technologies.Ī very good example for such operations and maintenance nightmare is the Voice over LTE (VoLTE) service, currently under deployment worldwide.

#Sip definition electronic records how to#

Furthermore, we present methods on how to gather cross-correlated data on specific fault management use-cases, particularly for unsuccessful voice calls.Īmong the various challenges of network and service monitoring, complexity is one of the hardest to overcome. After going into the details of messages, transactions, and dialogues, we present Call Data Record assembling methods for various scenarios. This paper presents a system for SIP Call Data Record assembling, shows what kind of key parameters have to be extracted in order to enable expert analysis. There are many obstacles to overcome here, including ciphered control messages and global identifiers hidden by temporary ones. These would allow operators to correlate control and user plane information of various interfaces and protocols. Network-wide data capture and analysis for the EPC and the IMS require new processing methods. For the VoLTE service, both the LTE Evolved Packet Core (EPC) and the IP Multimedia Subsystem (IMS) need to be monitored. Such a management framework includes network and service monitoring tools that help to provide better visibility of the various procedures. In order to be able to control the procedures-during deployment as well as during the operation-we need to have proper network and service management in place. The serving architecture is diverse, and the flexible services mean variable use-cases with complex message sequence charts. Although it has great promises-from high service flexibility to previously unseen QoS measures-so far it poses more challenges than expected. The Voice over LTE (VoLTE) service is under deployment at many operators.