1 / 17

Communication Networks – II Lecture 12 Advanced Computer Networks (ACN) 545

Mr. Thilak de Silva. BSc. Eng., MSc, CEng, FIE(SL), FIET(UK), CITP(UK), MBCS(UK), MIEEE (USA). Communication Networks – II Lecture 12 Advanced Computer Networks (ACN) 545. Today's Agenda. Networks Transmission Networks LTE Multiplexes. Session Outcomes.

marionv
Download Presentation

Communication Networks – II Lecture 12 Advanced Computer Networks (ACN) 545

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Mr. Thilak de Silva. BSc. Eng., MSc, CEng, FIE(SL), FIET(UK), CITP(UK), MBCS(UK), MIEEE (USA) Communication Networks – II Lecture 12Advanced Computer Networks (ACN) 545 M.Sc. in IT - Year 1 Semester II - 2012

  2. Today's Agenda • Networks • Transmission Networks • LTE • Multiplexes M.Sc. in IT - Year 1 Semester II - 2012

  3. Session Outcomes • At the end of this session you will understand about the Networks, LTEs, Multiplexes and their management systems. M.Sc. in IT - Year 1 Semester II - 2012

  4. Mobile Networks • All new systems has a reference architectures. Reference architecture, • Systems Reference architecture • Functional Reference architecture M.Sc. in IT - Year 1 Semester II - 2012

  5. 2G Mobile Networks Other circuit switched networks MS BTS BSS MSC GMSC 13 Kbps-1 64 Kbps-1 HLR Auc EIR M.Sc. in IT - Year 1 Semester II - 2012

  6. 2G Mobile Networks M.Sc. in IT - Year 1 Semester II - 2012

  7. Responsibilities of LTEs, • Including supervisory signals to supervise the end to end line. • Eg:- if a repeater is faulty it should be identified. Repeater Repeater LTE LTE Fiber Line M.Sc. in IT - Year 1 Semester II - 2012

  8. Responsibilities of LTEs, • Suitable encoding of bit patterns. • Eg:- Manchester Encoding AMI CMI • Media Conversion (if necessary) • Eg:-Electrical to Optical Conversion M.Sc. in IT - Year 1 Semester II - 2012

  9. LTEs – The network LET LET LET LET LET LET LET M.Sc. in IT - Year 1 Semester II - 2012

  10. LTE • All transmission networks terminates at LTE. • Need supervisory signals to monitor the link. • If one link is out of order or if a particular link is having high traffic the LTE finds an alternate link to send data. • This is the management part of the media. M.Sc. in IT - Year 1 Semester II - 2012

  11. LTE – Transmission Media Management System • Graphically represents all the LTEs and respective links between LETs. • Transmission media management can be done in a separate, central location. • This is for fiber optics. • Most of these software are pro-priority. M.Sc. in IT - Year 1 Semester II - 2012

  12. Multiplexes – The network MUX MUX MUX MUX MUX MUX MUX M.Sc. in IT - Year 1 Semester II - 2012

  13. Multiplexes • Telephone lines are connected to MUX. • Multiplexes are connected directly to LETs. • Logically Muxses forms a separate network but actually data are sent through the LETs. M.Sc. in IT - Year 1 Semester II - 2012

  14. Multiplexes • Eg:- SDH (ITU-T standard) • SDH includes a management system too. • Theses Multiplexes also has a separate management system, to divert the traffic in a failure of a link, to an alternate link. M.Sc. in IT - Year 1 Semester II - 2012

  15. LTE Restoration Vs Multiplexes Restoration • From these two fiber restoration is done immediately. (LTE Restoration) • Only if the fiber is slow, SDH will do the restoration. (Multiplexes Restoration.) • But Fiber management software is expensive and not used in countries like Sri Lanka. M.Sc. in IT - Year 1 Semester II - 2012

  16. Switches • Similar concept is used in switches. • Physical Layer, SDH layer and switches has separate management systems. M.Sc. in IT - Year 1 Semester II - 2012

  17. Thank You… M.Sc. in IT - Year 1 Semester II - 2012

More Related