Interworking of TCAP/SS7 and TCP/IP networks.

摘要

This thesis addresses the SS7 and TCP/IP interworking area, a popular research topic in the telecom industry for building a seamless network between the circuit-switched and packet data networks. This thesis is specifically focused on the TCAP in SS7 interworking with UDP/IP. The approach proposed in the thesis employs a signaling gateway to work on the edge of the two different networks in order to transfer the SS7 messages across UDP/IP network. The details of implementations for a signaling gateway to perform the protocol conversion are provided. The thesis also discusses how the management and control functions are implemented by mapping the ICMP messages of TCP/IP and the SCCP Unitdata Service messages of SS7. Examples for the interworking are given to demonstrate the solutions and products, which some telecom companies have developed.; Based on the interworking system proposed in this thesis, the performance parameters are simulated with OPNET, where different arrival rates of the traffic towards the signaling gateway are presumed. The simulation results are given in the graphs of CDF (cumulative distribution function), which show that most of the measured performance parameters meet the performance requirements as described in SS7 specifications.