Author_Institution :
Dept. of Electr. & Comput. Eng., George Mason Univ., Fairfax, VA, USA
Abstract :
The routing and congestion control function of Signaling System No.7 (SS7) are described. The elements of the SS7 protocol functional division include message transfer part (MTP), signaling correction control part (SCCP), ISDN user part (ISUP), and transaction capabilities (TC). The routing function, which takes place at the MTP and SCCP, and the congestion control function, which is present in multiple layers, are discussed. This includes MTP level 2, MTP level 3 by signaling traffic flow control procedures, and flow control for connection-oriented services of SCCP. To illustrate the unique capabilities present in SS7, the routing and congestion control functions in SS7 are compared to other common connectionless network layers. Performance considerations in routing and congestion control are discussed
Keywords :
ISDN; protocols; signalling (telecommunication networks); telecommunication traffic; ISDN user part; SS7; common channel Signaling System No.7; congestion control function; connection-oriented services; connectionless network layers; message transfer part; multiple layers; protocol functional division; routing function; signaling correction control part; signaling traffic flow control; transaction capabilities; ANSI standards; Communication system signaling; Communication system traffic control; Control systems; Intelligent networks; Packet switching; Protocols; Routing; Telecommunication control; Telephony;
