DSL, Mobile Telephone System, and Cable
Transcript of DSL, Mobile Telephone System, and Cable
![Page 1: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/1.jpg)
Chi-Cheng Lin, Winona State University
CS412 Introduction to Computer Networking &
Telecommunication
DSL, Cable, and Mobile Telephone System
![Page 2: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/2.jpg)
2
Topics
Digital Subscriber Line
Cable
Mobile Telephone System
![Page 3: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/3.jpg)
3
Digital Subscriber Lines
Bandwidth versus distanced over category 3 UTP for DSL.
![Page 4: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/4.jpg)
4
Digital Subscriber Lines
Operation of ADSL using discrete multitone modulation.
![Page 5: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/5.jpg)
5
Figure 9.1 DMT
![Page 6: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/6.jpg)
6
Figure 9.2 Bandwidth division
![Page 7: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/7.jpg)
7
Digital Subscriber Lines
A typical ADSL equipment configuration.
![Page 8: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/8.jpg)
8
Figure 9.3 ADSL modem
![Page 9: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/9.jpg)
9
Figure 9.4 DSLAM
![Page 10: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/10.jpg)
10
Wireless Local Loops
Architecture of an LMDS system.
![Page 11: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/11.jpg)
11
Cable Television
Community Antenna Television Internet over Cable Spectrum Allocation Cable Modems ADSL versus Cable
![Page 12: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/12.jpg)
12
Community Antenna Television
An early cable television system.
![Page 13: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/13.jpg)
13
Internet over Cable
Cable television
![Page 14: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/14.jpg)
14
Compared to Telephone System
The fixed telephone system.
![Page 15: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/15.jpg)
15
Spectrum Allocation
Frequency allocation in a typical cable TV system used for Internet access
![Page 16: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/16.jpg)
16
Cable Modems
Typical details of the upstream and downstream channels in North America.
![Page 17: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/17.jpg)
17
Figure 9.8 Cable modem
![Page 18: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/18.jpg)
18
Figure 9.9 CMTS
![Page 19: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/19.jpg)
19
ADSL versus Cable
Discussions …
![Page 20: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/20.jpg)
20
Mobile Telephone System
First-Generation Mobile PhonesAnalog Voice
Second-Generation Mobile PhonesDigital Voice
Third-Generation Mobile PhonesDigital Voice and Data
![Page 21: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/21.jpg)
21
Advanced Mobile Phone System
Area is divided into cells with an antenna control by a cell office in each cell
Cell offices communicate with MTSO Transmission frequencies cannot be
the same in adjacent cells Cell size is not fixed
Smaller cells used in higher populated area
![Page 22: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/22.jpg)
Figure 7-36
WCB/McGraw-Hill The McGraw-Hill Companies, Inc., 1998
Cellular System
![Page 23: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/23.jpg)
23
Advanced Mobile Phone System
(a) Frequencies are not reused in adjacent cells.(b) To add more users, smaller cells can be used.
![Page 24: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/24.jpg)
24
Figure 17.2 Frequency reuse patterns
![Page 25: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/25.jpg)
25
Cellular Transmission
Traditionally analogFM used to minimized noise
Digital transmissionCDPD (Cellular Digital Packet Data)
Low-speed digital service over existing cellular network
Based on OSI ModelModem needed
![Page 26: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/26.jpg)
26
Cellular System Handoff
When a mobile telephone leaves a cell1. Its base station notices the signal fading out2. The base station asks all the surrounding
base stations how much power they are getting from it
3. Ownership is transferred to the neighbor base station that receives strongest power
4. The telephone is informed of its new boss5. If a call is in progress, it will be asked to
switch to a new channel
![Page 27: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/27.jpg)
27
Channels
832 full-duplex channelsEach channel consists of 2 simplex
channelsTransmission channels
(849-824)MHz/30KHz 832
Receiving channels(894-869)MHz/30KHz 832
Typically, actual number of voice channel per cell 45
![Page 28: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/28.jpg)
28
Channel Categories
The 832 channels are divided into four categoriesControl (base to mobile) to manage
the systemPaging (base to mobile) to alert users
to calls for themAccess (bidirectional) for call setup
and channel assignmentData (bidirectional) for voice, fax, or
data
![Page 29: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/29.jpg)
29
Second-Generation Mobile Phones
D-AMP
GSM
CDMA
![Page 30: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/30.jpg)
30
D-AMPS Digital Advanced Mobile Phone System
(a) A D-AMPS channel with three users.(b) A D-AMPS channel with six users.
![Page 31: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/31.jpg)
31
GSMGlobal System for Mobile
Communications GSM uses 124 frequency channels,
each of which uses an eight-slot TDM system
![Page 32: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/32.jpg)
32
GSM
A portion of the GSM framing structure.
![Page 33: DSL, Mobile Telephone System, and Cable](https://reader035.fdocuments.us/reader035/viewer/2022062513/555b2219d8b42aa67a8b4fbd/html5/thumbnails/33.jpg)
33
Third-Generation Mobile Phones:Digital Voice and Data
Basic services an IMT-2000 network should provideHigh-quality voice transmissionMessaging
Replace e-mail, fax, SMS, chat, etc.
Multimedia Music, videos, films, TV, etc.
Internet accessWeb surfing, w/multimedia
2.5G, 4G, …