UMTS R4 Networking

A UMTS R4 network is designed in the BICC structure so that new services can be easily applied. The core network adopts packet bearer mode, which occupies less bandwidth.

Compared with the UMTS R99 network, the UMTS R4 access network is the same while its core network adopts packet connections. In the UMTS R4 core network, the MGW (UMG8900) provides standard Mc, Iu CS and Nb interfaces to connect with a (G)MSC Server and other MGWs that support 3GPP standards.

As the MGW in the UMTS R4 core network, the UMG8900 is responsible for service bearer and bearer control of the CS domain.

The UMG8900 can alsobe applied to a GMSC where it acts as a3G gateway exchange equipment to connect with the PSTN. The UMG8900 and the PSTN are connected in the TDM mode. The signaling proceeding between them is implemented eitherby the SG embedded in the UMG8900 orby an independent SG .

 In the UMTS R4 core network, the MGW (UMG8900) provides standard Mc, Iu CS and Nb interfaces to connect with a (G)MSC Server and other MGWs that support 3GPP standards.

As far we know, Mc interface is using between MGW & Server for any configuration. So, What is standard Mc interface?