Week 1 Flashcards
Global System for Mobile Telecommunications (GSM)
A cellular network standard used by the overwhelming majority of mobile devices around the world.
Uniquely identify GSM
Devices that follow the standard are identified by their serial number or IMEI number.
International Mobile Equipment Identifier (IMEI)
A unique number given to every single
mobile phone. The length is typically 15
digits:
- TAC
- Serial Number
- Checksum
Type Allocation Code (TAC)
An eight-digit decimal code that identifies the vendor and model of the mobile device.
Serial Number
A six-digit number that uniquely identifies a specific unit manufactured by the vendor.
Checksum
An optional algorithm computed against the TAC and serial number for authentication and to verify the integrity of the lMEl.
Uniquely identify CDMA
Devices that follow the standard are identified by their ESN and MEID
Electronic Serial Number (ESN)
An 11-digit decimal code or eight-character hexadecimal number used to uniquely identify the mobile device and equipment vendor (obsolete and is no longer issued to new mobile devices).
Mobile Equipment Identifier (MEID)
A 15 digit hexadecimal number that uniquely identifies the mobile device (created to replace issuance of ESN).
Subscriber Identification
In devices that follow the GSM/UMTS network standard , this data is located on the SIM card.
Subscriber Identity Module (SIM)
A smart card that holds very important network data needed to make a successful connection to the cellular network provider.
3 files that can be analysed for identification:
- ICCID,
- IMSI,
- MSISDN;
Integrated Circuit Card Identifier (ICCID)
A 19 or 20 digit serial number for the SIM card that uniquely identifies that particular SIM card.
Typically structured as:
- Major Industry Identifier (MII)
- Mobile Country Code (MCC)
- Issuer ID
- Individual Account lD
- Parity check bit (Checksum)
International Mobile Subscriber Identifier (IMSI)
a 14 or 15 digit number that uniquely identifies a subscriber’s account with the cellular network provider.
Typically structured as:
- Mobile Country Code (MCC)
- Mobile Network Code (MNC)
- Mobile Subscriber Identification Number (MSIN)
Mobile Station International Subscriber Directory Number (MSISDN)
An 11-digit number used to reach
the mobile device. This is the full phone number of a subscriber.
Typically structured as:
- Country Code (CC)
- Number Planning Area (NPA)
- Subscriber Number (SN)
Code Division Multiple Access (CDMA)
Technology that uniquely identifies subscribers using the
Mobile Identification Number (MIN).
Usually, the MIN is the same value as the MSISDN, however, they may be different if the device is ported to a new network.
2G Networks
Early generation, were 100% digital and allowed for encrypted conversations and transmission of data, enabling users to send and receive SMS text messages to each other for the first time.
Not very fast and typically could only transfer data at a maximum rate of approximately 56 kbit/second to residential subscribers.
*GSM 850, 900, 1800, 1900
2G CDMA
Qualcomm initially developed this network in 1993. Typically only seen in the USA:
800, 1700, 1900, 2100
3G UMTS Networks
Created to accommodate the boom in smartphone sales:
850, 900, 1900, 2100
4G Networks
Introduced in 2006 with WiMAX and LTE in 2009.
Though not widely available, advertised data transfer rates of 2 ~ 20 Mbps are still being tested and verified.
Base Stations
Cellular networks rely on these located in an area to provide the best coverage to mobile devices.
A cell is an area that is covered by three base stations and the subscriber can move within that cell and receive a network connection.
There may, however, be dead spots where no coverage exists depending on provider resources and the health of the base stations.
Each base station has a unique ID and has latitude/longitude coordinates that can be used to track connected mobile devices.
WiFi
IEEE 802.11 specification defines this service for mobile devices and personal computers.
Specifications indicate that data
transfer can occur at speeds of up to 600 Mbit/s.
802.16 (WiMax)
Wireless network standard capable of data transfer rates up to 1Gbit/s.
Typically utilized as a portable backup access point.
Bluetooth
Wireless network standard designed to provide secure connectivity between devices to provide additional functionality.
- Keyboards
- Computer mice
- Headphones
- Connecting with other mobile devices
Near-Field Communication (NFC)
Wireless standard used to share information securely between two compatible devices that are actually
touching or within very close proximity.
Popular with contactless payment.
