Estimation of additional signal traffic CCS № 7 at provision of services with the mobile number portability

The service of mobile number portability has been operating in Russia since 2013. A central database of the ported numbers has been created and access to it has been provided to all operators of mobile networks. Voice services and short text messaging services using ported numbers require the gateway mobile switching center to request a special signal node in which a copy of the central database is stored and receive information about the ported number from it. These requests and responses are transmitted using the common channel signalling № 7, so additional traffic is generated in the signaling network. The article presents a technique for determining the volume of this signaling traffic based on the analysis of signal messages of the protocol stacks common channel signalling № 7 and SIGTRAN transmitted during the interaction of the gateway mobile switching center with the special signal node. The technique allows to estimate the necessary network resource for the transmission of additional signalling traffic using transport networks with circuit switching and packet switching. An example of calculating the volume of additional signalling traffic and the necessary network resource in the network of common channel signalling № 7 is given, using the example of a large mobile operator 2G/3G /4G.