
Define the core network as a dedicated-resource circuit-switched system that reserves resources for each voice call, contrasting it with the shared-resource packet-switched network.
Here the student will learn about how the circuit core network is structured into layers
Explain how the control plane governs the connectivity layer with media gateways, using the gateway control protocol and MSC guidance, covering voice bearer, packet handling, and security.
Explore transport nodes in the connectivity layer, including IP and backbone routers, layer two/three switches, firewalls, and network time protocol service, supporting the media gateway and mobility management.
The MSC server handles call control, charging, and media gateway resources, terminates signaling towards GSM and W-CDMA, connects to Sgsn via GS, and manages VLR and mobility like location updates.
The TSC server acts as the control node routing calls between networks. It serves as a gateway and adapter to ISUP, bridging ICC to external networks like PSTN and ISDN.
Explore how the GSMC server functions as a multi-role node in mobile networks, enabling location information requests and subscriber queries through MSC interactions.
Learn how the MSC functions as a short message service gateway, routing messages by interrogating subscriber location, and how the SMS interworking MSC handles origination and inter-network delivery.
Store subscriber data and authentication parameters in the home location register to enable services and roaming. Interface with authentication centers and network nodes via the mobile application protocol for routing.
Describe how the authentication center stores subscriber identifiers and keys and generates authentication and ciphering data, using quintuplets and triplets to authenticate the subscriber and network, with AUC to MSC.
Explore the equipment identity register (EIR) and its role with IMEI to uniquely identify phones, and why a national EIR across networks stops stolen devices.
Explore mobile network portability and the role of the number portability node in enabling you to keep your MTN number while switching to AirtelTigo and still make and receive calls.
Explore the service layer of the intelligent network, including the sms service center, value-added services, USSD codes, and promotions, and preview CSP, SAPs, and architecture.
Welcome to CCBC (CCIC Module 1): Circuit Core Basics, an introductory course that provides essential knowledge of Circuit Core in telecommunications. In this module, our focus is on circuit core nodes, where you will learn about different nodes such as MSC (Mobile Switching Center), MGW (Media Gateway), HLR (Home Location Register), and more.
There is no pre-requisite to this course. The course is meant for engineering students, graduates, interns, telecom engineers and enthusiasts.
CCBC is designed to lay a strong foundation in Circuit Core, familiarizing students with the fundamental concepts and components of this vital domain. By delving into the core nodes, you will gain a comprehensive understanding of their roles, functionalities, and their significance in supporting circuit-switched telecommunication services.
Throughout this course, you will explore various circuit core nodes such as the MSC, which acts as a central hub for call switching and routing in mobile networks. You will also dive into the MGW, which serves as a bridge between circuit-switched and packet-switched networks, enabling seamless voice and multimedia communication.
Additionally, we will cover the HLR, which is responsible for storing subscriber data and managing their mobility within the network. - Other nodes either physical or logical will be learnt as well.