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الانتساب : Sep 2007
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جزاك الله خيرا اخي اسير الحزن لطرحك الرائع
واسمح لي بهذه الاضافه في موضوعك ليكون الكرجع للجميع للتعرف ع الماده من خلاله
Introduction
T305 is about communication of sound, images and data: from telephony and computer ne***rks to an information superhighway.
T305 is split into *** main blocks. Each block contains material in three strands:
a. Systems and processes (green labeled ****s).
b. Modeling (blue ****s with computer-****d teaching packages).
c. Applications and issues (Block companions).
a. Systems and Processes
The greatest portion of your study time overall will be spent on this strand, which looks at the processes used by digital communication systems. This is where you will learn, for example, about how signals are encoded digitally, how they can share transmission paths, and some of the processes that take place inside a telephone exchange.
The teaching for this strand is mostly done with conventional Open University teaching ****s, and for most blocks these main ****s are in *** parts (on different subjects) bound together.
However, some of the ****s also have associated computer-****d teaching packages or ask you to create spreadsheets. It will be important to work through the computer session as soon as you can.
For many of the ****s in the Systems and Processes strand, you can also find further information or updating material either in the printed Block Companion, or in electronic form in the course conference or ***site.
b. Modelling
The Modelling strand introduces the use of mathematical, graphical and computer methods for modelling systems and processes in communications.
Your study of this strand is very much activity-****d, and most of your work will be done at the computer, either using teaching software supplied by us or working with spreadsheets that you have constructed yourself.
You will be guided in your work by the Modelling Activities books, which are divided into sessions of different types:
• CD-ROM activity. You will use a series of computer-****d teaching packages, which are supplied by us on CD-ROMs.
• Spreadsheet activity. You will work from the Modelling Activities books, but you will be asked to create spreadsheets as part of the activity.
• In some sessions you will work solely from the printed material – the Modelling Activities books and sections of the Reference Book to which you are directed.
c. Applications and Issues
You will find that there is a ‘special topic’ associated with each block. The idea of the special topics is that they use the knowledge you have gained in your study of the course up to that point in order to explore some issue or development in the field of digital communications.
You will be guided in your study of the Applications and Issues strand by the Block Companions, in which you will find printed copies of material relevant to the block’s special topic, such as journal articles.
Start your study of each block by reading the Block Companion.
In fact, the Block Companion is the starting – and finishing – point of your study of each block. In addition to material about the block’s special topic, it contains guidance on how to study the block, extra or updating information on the block topics, and the assignments associated with the block.
In this course, tutor-marked assignments (TMAs) are numbered from TMA 10 to TMA 16. You should note that Block 1 has *** assignments associated with it – TMA 10 and TMA 11.
Video and audiocassettes
Digital communication is affecting all our lives to an ever-greater extent. The degree to which this is true will be seen in the video programmes (*** half-hour video programmes) have been produced in a ********ary style rather than as ‘teaching’ material.
The issues in the programmes cover a broad range of human concerns. When watching the programmes you should try to identify the underlying technology and see how it influences, and is influenced by, the issues in the programme.
The audiocassettes provide a similar role to the videos, but are more focused on specific issues in T305 and make extensive use of interviews with experts in the field. You should listen to them after watching the videos, and then again later in the course when suggested in the Block Companions.
Other course ****s
The other ****s of the course are as follows.
Reference Book
To focus your study on understanding the course material rather than trying to memorize facts, there is a course Reference Book.
Chapters 1 to 6 of the Reference Book contain brief explanations of all the topics in the Modelling strand.
These chapters are not meant to be teaching material (the teaching is done in the Modelling Activities books or on CD-ROM), but you will be asked to read them in conjunction with your study of the associated topics.
Chapter 7 of the Reference Book contains facts, formulae, figures and tables associated with the Systems and Processes strand. Note that, unlike Chapters 1 to 6, Chapter 7 does not include explanations of any of the material.
Extract from T293
T305 assumes that you start with a knowledge of the technology of digital communications at a level *****alent to that covered in the discontinued course T293 Communicating Technology.
To help you revise this prerequisite knowledge, you have been sent an extract from T293, which you are asked to read at the beginning of your study of T305.
[grade="FFA500 FF6347 008000 4B0082"]A brief summary of the course *******s:[/grade]
Block 1:
Systems and processes
Part 1: Communication ne***rk architecture ( LANs, Ethernet standards).
Part 2: Communication ne***rk protocols ( Internet protocols: TCP/IP).
Modeling
Computer-****d teaching packages used to specify, describe and model communication system. Topics covered include finite state machine, ******-oriented methods, and SDL (specification and de******ion ********).
Block 2:
Systems and processes
Part 1: transmission standards (synchronous digital hierarchy)
Part 2: Ne***rk management (Reliability).
Modeling
Introduction to probability.
Material on reliability modeling using computer-****d teaching and spreadsheet.
Block 3:
Systems and processes
Message coding (pulse code modulation, coding for fax, and coding of images).
Modeling
Part 1: Sinusoids and Fourier series (exploration of sinusoids using a spreadsheet and moves on to computer-****d teaching of Fourier series as a way of modeling signals.
Part 2: Information theory (uses spreadsheet and CD-ROM sessions to look how information can be encoded with maximum efficiency and redundancy).
Block 4:
Systems and processes
Part 1: Routing and switching (circuit switched ne***rks and packet switched ne***rks. A number of computer-****d teaching packages are used to support the teaching in this ****.
Part 2: Signaling.
Modeling
Traffic: (determines how much equipment is needed to cope with the demand in the fast majority of cases).
Block 5:
Systems and processes
Part 1: Channel coding (used to detect error or to correct error). This is done using spreadsheets and one computer-****d teaching package associated with this ****.
Part 2: Modulation (how signals applied to transmission medium like: radio signals in space or light signals in optical fiber). There are *** computer-****d teaching packages associated with this ****.
Modeling
Pulses and Systems: use spreadsheets and computer-****d teaching packages for explaining time and frequency domain modeling of signals.
Block 6:
Systems and processes
Part 1: Development of optical-fiber communication (Dense wavelength division multiplexing: DWDM).
Part 2: Multi-service ne***rk (like Asynchronous transfer mode, ATM).
Modeling
Signal Impairments (analyzing the effects of signal degradation when it is sent across a communication link).
T305 CD-ROMs
There are *** CD-ROMs associated with this course. They will be used to provide a series of computer-****d teaching packages especially for the modeling strand
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