Mobile Phone Networks Dr. Hassan Nojumi1 MOBLIE PHONE NETWORKS Dr. Hassan Nojumi

Mobile Phone Networks Dr. Hassan Nojumi2 Functions of Mobile Phones

Mobile Phone Networks Dr. Hassan Nojumi3 Functions of Mobile Phones Send/Receive Voice Message

Mobile Phone Networks Dr. Hassan Nojumi4 Functions of Mobile Phones Send/Receive Voice Message Send/Receive

Mobile Phone Networks Dr. Hassan Nojumi5 Functions of Mobile Phones Send/Receive Voice Messages Send/Receive Internet Connection

Mobile Phone Networks Dr. Hassan Nojumi6 Functions of Mobile Phones Send/Receive Voice Messages Send/Receive Internet Connection Complementing PDAs, GPS Receivers, etc.

Mobile Phone Networks Dr. Hassan Nojumi7 Functionality Combination of... And...

Mobile Phone Networks Dr. Hassan Nojumi8 Functionality Combination of Telephone Technology And...

Mobile Phone Networks Dr. Hassan Nojumi9 Functionality Combination of Telephone Technology And Wireless Communication

Mobile Phone Networks Dr. Hassan Nojumi10 Basic Notion Geographical Division into Cells

Mobile Phone Networks Dr. Hassan Nojumi11 Basic Notion Geographical Division into Cells Result: Possibility of simultaneous use of frequency bands by users

Mobile Phone Networks Dr. Hassan Nojumi12 Basic Technology Each Cell About 10 square miles About 26 square kilometers

Mobile Phone Networks Dr. Hassan Nojumi13 Basic Technology Each Cell About 10 square miles About 26 square kilometers With a Base Station with transmission equipment and antenna

Mobile Phone Networks Dr. Hassan Nojumi14 Basic Technology Communication can be made using the same frequencies in different cells.

Mobile Phone Networks Dr. Hassan Nojumi15 Basic Technology Communication can be made using the same frequencies in different cells. Several service providers may use one Tower.

Mobile Phone Networks Dr. Hassan Nojumi16 Basic Notion: Cellular

Mobile Phone Networks Dr. Hassan Nojumi17 Communication Channels Simplex: One-Way

Mobile Phone Networks Dr. Hassan Nojumi18 Communication Channels Half-Duplex: Two-Way One at a time

Mobile Phone Networks Dr. Hassan Nojumi19 Communication Channels Full-Duplex: Two-Way Simultaneously

Mobile Phone Networks Dr. Hassan Nojumi20 Communication Channels Full-Duplex: Two-Way Simultaneously

Mobile Phone Networks Dr. Hassan Nojumi21 Communication Channels Each cell About 56 Voice Channels (Full-Duplex)

Mobile Phone Networks Dr. Hassan Nojumi22 Communication Channels Each cell About 56 Voice Channels (Full-Duplex) Several Control Channels

Mobile Phone Networks Dr. Hassan Nojumi23 Communication Channels Each cell About 56 Voice Channels (Full-Duplex) Several Control Channels Three-fold increase possible by TDMA

Mobile Phone Networks Dr. Hassan Nojumi24 Analog Versus Digital Digital signals can be manipulated, compressed, etc., more easily.

Mobile Phone Networks Dr. Hassan Nojumi25 Analog Versus Digital Digital signals can be manipulated, compressed, etc., more easily. FSK (Frequency Shift Keying) for Tower/Phone Connection

Mobile Phone Networks Dr. Hassan Nojumi26 Access Technologies

Mobile Phone Networks Dr. Hassan Nojumi27 Access Technologies FDMA Frequency Division Multiple Access

Mobile Phone Networks Dr. Hassan Nojumi28 Access Technologies FDMA Frequency Division Multiple Access Available frequency band is divided and each part assigned separately.

Mobile Phone Networks Dr. Hassan Nojumi29 Access Technologies FDMA

Mobile Phone Networks Dr. Hassan Nojumi30 Access Technologies FDMA Traditional radio transmission

Mobile Phone Networks Dr. Hassan Nojumi31 Access Technologies FDMA Traditional radio transmission Not efficient for digital transmission

Mobile Phone Networks Dr. Hassan Nojumi32 Access Technologies TDMA Time Division Multiple Access

Mobile Phone Networks Dr. Hassan Nojumi33 Access Technologies TDMA Time Division Multiple Access Available time is divided and each part assigned separately.

Mobile Phone Networks Dr. Hassan Nojumi34 Access Technologies TDMA

Mobile Phone Networks Dr. Hassan Nojumi35 Access Technologies TDMA Suitable for digital transmission as compression techniques can greatly reduce needed transmission time.

Mobile Phone Networks Dr. Hassan Nojumi36 Access Technologies TDMA “Multiprogramming” idea

Mobile Phone Networks Dr. Hassan Nojumi37 Access Technologies TDMA “Multiprogramming” idea Has typically three times the capacity of an analog system

Mobile Phone Networks Dr. Hassan Nojumi38 Access Technologies TDMA IS- 54: 800 MHz Band

Mobile Phone Networks Dr. Hassan Nojumi39 Access Technologies TDMA IS- 54: 800 MHz Band IS-136: 1900 MHz Band

Mobile Phone Networks Dr. Hassan Nojumi40 Access Technologies TDMA IS- 54: 800 MHz Band IS-136: 1900 MHz Band Dual-Band phones can operate in both bands.

Mobile Phone Networks Dr. Hassan Nojumi41 Access Technologies TDMA/GSM Global System for Mobile Communications Specialized TDMA used for mobile phone communication

Mobile Phone Networks Dr. Hassan Nojumi42 Access Technologies TDMA/GSM Encryption methods are used to make the call more secure.

Mobile Phone Networks Dr. Hassan Nojumi43 Access Technologies TDMA/GSM To Connect to different service providers, users change their SIM (Subscriber Identification Module) Cards that contain necessary data for connection

Mobile Phone Networks Dr. Hassan Nojumi44 Access Technologies CDMA Code Division Multiple Access

Mobile Phone Networks Dr. Hassan Nojumi45 Access Technologies CDMA Code Division Multiple Access Communication data is digitized and distributed over the available band.

Mobile Phone Networks Dr. Hassan Nojumi46 Access Technologies CDMA Code Division Multiple Access Each call is assigned a Sequence Code. Calls are overlaid over available band.

Mobile Phone Networks Dr. Hassan Nojumi47 Access Technologies CDMA

Mobile Phone Networks Dr. Hassan Nojumi48 Communication Cells Each cell About 26 Km 2

Mobile Phone Networks Dr. Hassan Nojumi49 Communication Cells Each cell About 26 Km Many Base Stations and Transmission Towers required for a large city (paid off by many customers) 2

Mobile Phone Networks Dr. Hassan Nojumi50 Communication Cells All Base Stations in a region are controlled by an MTSO (Mobile Telephone Switching Office)

Mobile Phone Networks Dr. Hassan Nojumi51 Cell Phone Codes ESN Electronic Serial Number Unique 32-bit number programmed into the phone at manufacture - Permanent and Unchangeable -

Mobile Phone Networks Dr. Hassan Nojumi52 Cell Phone Codes MIN Mobile Identification Number 10-digit number derived from mobile phone number - Assigned When Phone Activated -

Mobile Phone Networks Dr. Hassan Nojumi53 Cell Phone Codes SID System Identification Number 5-Digit Carrier Code - Assigned When Phone Activated -

Mobile Phone Networks Dr. Hassan Nojumi54 Cell Phone Codes Each phone user has a unique MIN&ESN identification, used by the phone company for billing.

Mobile Phone Networks Dr. Hassan Nojumi55 Cell Phone Codes MIN&ESN identification may be captured by scanning the call and used by a third party for making fraudulent calls.

Mobile Phone Networks Dr. Hassan Nojumi56 Cell Phone Communication Startup

Mobile Phone Networks Dr. Hassan Nojumi57 Cell Phone Communication Startup Phone turned on.

Mobile Phone Networks Dr. Hassan Nojumi58 Cell Phone Communication Startup Phone turned on. Device sends Registration Request to MTSO

Mobile Phone Networks Dr. Hassan Nojumi59 Cell Phone Communication Startup Phone turned on. Device sends Registration Request to MTSO An SID is looked for on a Control Channel.

Mobile Phone Networks Dr. Hassan Nojumi60 Cell Phone Communication Startup If SID not found, Out of Range.

Mobile Phone Networks Dr. Hassan Nojumi61 Cell Phone Communication Startup If SID not found, Out of Range. If SID found, comparison is made with the programmed SID in the phone device

Mobile Phone Networks Dr. Hassan Nojumi62 Cell Phone Communication Startup If SID not found, Out of Range. If SID found, comparison is made with the programmed SID in the phone device Matched SID Means Home

Mobile Phone Networks Dr. Hassan Nojumi63 Cell Phone Communication Startup If SID Not matched, MTSO contacts the Home MTSO to verify that SID in the phone device is valid.

Mobile Phone Networks Dr. Hassan Nojumi64 Cell Phone Communication Connection Destination is dialed.

Mobile Phone Networks Dr. Hassan Nojumi65 Cell Phone Communication Connection Destination is dialed. MTSO selects and assigns a frequency channel for call

Mobile Phone Networks Dr. Hassan Nojumi66 Cell Phone Communication Connection Cell Change is done by coordination between cells and MTSO using signal strengths.

Mobile Phone Networks Dr. Hassan Nojumi67 Basic Notion: Cellular

Mobile Phone Networks Dr. Hassan Nojumi68 Other Cellular Phone Details:

Mobile Phone Networks Dr. Hassan Nojumi69 Other Cellular Phone Details: Hardware/Software

Mobile Phone Networks Dr. Hassan Nojumi70 Other Cellular Phone Details: Hardware/Software Analog-to-Digital Conversion

Mobile Phone Networks Dr. Hassan Nojumi71 Other Cellular Phone Details: Hardware/Software Analog-to-Digital Conversion Digital-to-Analog Conversion

Mobile Phone Networks Dr. Hassan Nojumi72 Other Cellular Phone Details: Hardware/Software Analog-to-Digital Conversion Digital-to-Analog Conversion Display

Mobile Phone Networks Dr. Hassan Nojumi73 Other Cellular Phone Details: Hardware/Software Analog-to-Digital Conversion Digital-to-Analog Conversion Display Power/Batteries

Mobile Phone Networks Dr. Hassan Nojumi74 Other Cellular Phone Details: Cell Phone Etiquette