PMQ50: Mobile Terminals, Cellular Networks, IMS, and Telephony

Vocabulary flashcards covering mobile terminals, cellular technologies, GSM architecture, mobile generations, IMS protocols, and telephony concepts based on the PMQ50 lecture notes.

Mobile Terminal (Terminal Mobile)

A small computing or communication device that can be transported during travel and used as a terminal providing wireless access to one or more networks.

Terminal (Historical Computing Definition)

An input and output peripheral for a remote host computer, a term originating in the 1960s.

Portability (Portabilité)

A characteristic that enables a user to make their work, communication, entertainment, and information retrieval practices nomadic across all travels.

Connectivity (Connectivité)

Mobile access to the Internet and the Web, enabling communications at any given time.

Multimedia (Multimédia)

The viewing and consultation of content in all formats, including text, image, and video.

FDA600

A mobile terminal equipped with a printer, barcode reader, card reader, Wi-Fi, GSM/GPRS, RFID, and SD/MMC support.

YOXIMO

A mobile payment terminal featuring wireless connectivity through Wi-Fi or 2G/3G networks.

SMS (Short Message Service)

A brief text message sent from a mobile telephone with a maximum length of 160 characters, which later evolved to include images, photos, sounds, and video.

Smartphone (Ordiphone / Téléphone Intelligent)

A cellular phone that integrates an embedded computer operating system to provide personal digital assistant functions, hybrid communication, and Internet access beyond basic telephony.

Digital Tablet (Tablette Numérique)

A portable slate-shaped device with a touchscreen as its sole interface, offering personalization, multiple applications, Internet access, and multimedia content.

Mobile Application

A downloadable program, free or paid, designed to run directly from the operating system of a smartphone or tablet.

Geolocation (Géolocalisation)

The process of identifying the position of an entity within geographic coordinates, such as locating a mobile phone via cellular networks or satellite positioning systems.

ATAWAD

An acronym standing for 'Any time, Anywhere, Any device' ('tout le temps, partout, sur tout support').

Mobile Operating System

An operating system engineered for mobile devices, focusing on wireless connectivity management and touch-based interfaces within limited hardware resources.

Mobinaute

A portmanteau of 'mobile' and 'internaute' representing an Internet user who accesses the Internet from a mobile terminal while on the move.

Notebook

A portable laptop computer commonly taking the form of a small briefcase, built to be easily carried and operate autonomously.

Netbook

A laptop smaller and less powerful than a notebook, designed predominantly for web browsing.

Apple Newton

The first modern form of touchscreen handheld device, launched by Apple in 1993 without a physical keyboard and operated via a stylus.

Cellular Network Structure

A network layout dividing geographical coverage into cells to enable the reuse of identical radio frequency bands multiple times across a region.

GSM (Global System for Mobile Communications)

A second-generation digital wireless cellular network standard, originally created under the name 'Groupe Spécial Mobile'.

MS (Mobile Station)

A mobile device composed of Mobile Equipment (ME) with an appropriate transceiver and a Subscriber Identity Module (SIM) card.

BSS (Base Station Subsystem)

The radio access portion of the GSM network connecting the Mobile Station (MS) to the Mobile Switching Center (MSC).

BTS (Base Transceiver Station)

A BSS radio element comprising an interface element, a transmitter/receiver, and an antenna, responsible for the physical radio link.

BSC (Base Station Controller)

A network node controlling up to 100 BTS units, responsible for primary radio link control and surveillance functions.

Handover

The automated operational process permitting a Mobile Station (MS) to switch between cellular base stations without terminating the active call or service.

NSS (Network Subsystem)

The routing and switching core of a GSM cellular network tasked with directing calls between users or out to external networks.

MSC (Mobile Switching Center)

The primary switching component in the NSS responsible for call routing, multiplexing, inter-network interconnectivity, and roaming coordination.

Roaming

The telecommunication capability that allows a mobile user to be reached and place calls anywhere in the world across different operator networks.

HLR (Home Location Register)

The central permanent database containing profiles, service authorizations, and identifiers for every authorized subscriber belonging to a mobile operator.

VLR (Visitor Location Register)

A local dynamic database containing temporary user profiles and location data for all mobile stations currently handled within a given MSC coverage area.

GMSC (Gateway MSC)

A designated gateway Mobile Switching Center providing an interconnection point to route calls between mobile networks and fixed networks like the RTC (PSTN).

OMC (Operation and Maintenance Center)

The management entity dedicated to monitoring, configuring, and maintaining the ongoing operational health of GSM network nodes.

GPRS (General Packet Radio Service)

A 2.5G standard derived from GSM that introduces packet-switched data transfer, volume-based billing, and persistent connectivity.

EDGE (Enhanced Data for GSM Evolution)

A 2.75G evolution of GPRS providing higher packet data rates of approximately $177\,\text{kbit/s}$ for stationary users.

UMTS (Universal Mobile Telecommunications System)

A 3G mobile standard using the $1900-2000\,\text{MHz}$ frequency band and delivering speeds around $384\,\text{kbit/s}$.

LTE (Long Term Evolution)

A telecommunications standard initially classified as pre-4G (3.9G) and designated 4G by the ITU in October 2010, providing a theoretical downlink rate of $150\,\text{Mbit/s}$.

WiMax (Worldwide Interoperability for Microwave Access)

A wireless broadband standard categorized under the 4G generation family.

3GPP (3rd Generation Partnership Project)

A standards body created in 1998 to develop technical specifications for GSM-based 3G systems, currently responsible for GSM, UMTS, LTE, and 5G.

3GPP2

A standards organization established in 1998 to develop mobile specifications centered on CDMA technologies, specifically CDMA2000.

IMS (IP Multimedia Subsystem)

A standard architectural framework introduced in 3GPP Release 5 (2002) for UMTS to deliver IP-based multimedia services across mobile and fixed access networks.

P-CSCF (Proxy-CSCF)

The initial SIP contact point for the user in IMS, responsible for security, SIP message compression, and QoS bearer setup.

I-CSCF (Interrogating-CSCF)

An IMS SIP server acting as the entry point for sessions destined to internal subscribers, querying the HSS to select the appropriate S-CSCF.

S-CSCF (Serving-CSCF)

The core IMS session control engine that performs user registration, enforces service execution policies, and routes traffic to application servers.

HSS (Home Subscriber Server)

The central IMS database repository containing subscriber service profiles, identities, and authentication keys.

PCRF (Policy and Charging Rules Function)

A network policy node that determines Quality of Service rules and applies charging parameters for IMS and IP sessions.

MRF (Media Resource Function)

An IMS component split into a controller (MRFC) and processor (MRFP) that handles media stream processing, mixing, and transcoding.

IMPI (IP Multimedia Private Identity)

A permanent unique identity assigned to a device or subscriber utilized exclusively for IMS authentication.

IMPU (IP Multimedia Public Identity)

A public address formatted as a SIP URI or TEL URI used by third parties to establish sessions with an IMS subscriber.

SBC (Session Border Controller)

A perimeter security node deployed at IMS boundaries to filter SIP traffic, prevent DoS attacks, and block unauthorized behavior.

VoLTE (Voice over LTE)

An IMS-driven packet-based communication profile delivering high-definition voice over 4G LTE radio networks.

RCS (Rich Communication Services)

An IMS-enabled evolution of mobile messaging providing advanced chat, typing indicators, read receipts, and content sharing.

RNIS / ISDN (Réseau Numérique à Intégration de Services)

An end-to-end digital network carrying multiple integrated voice, data, and image services across a single subscriber line.

Basic Rate Access (Accès de base T0)

An ISDN connection composed of 2 B channels at $64\,\text{kbit/s}$ and 1 D channel at $16\,\text{kbit/s}$, achieving a total throughput of $144\,\text{kbit/s}$.

Primary Rate Access (Accès primaire T2)

The European ISDN standard comprising 30 B channels at $64\,\text{kbit/s}$ and 1 D channel at $64\,\text{kbit/s}$, achieving $2\,\text{Mbit/s}$.

RTC / PSTN (Réseau Téléphonique Commuté)

A public wired circuit-switched telecommunication network connecting fixed landline telephones over copper loops.

Erlang

A unit of telecommunication traffic intensity representing continuous occupancy of one transmission circuit.

Jitter Buffer

A memory buffer that absorbs packet delay variations by holding incoming voice packets and releasing them at evenly spaced intervals.

Gatekeeper

An H.323 entity providing authorization, admission control, address resolution, and bandwidth management without handling voice media streams directly.

VoNR (Voice over New Radio)

The native voice transport architecture operating directly across standalone 5G radio networks.