Please enable JavaScript.

Coggle requires JavaScript to display documents.

Access control methods (CSMA/CD (Multiple Access (Carrier sensin…

- - - - The slots are given to them whether they want them or not
- - - - durin Tpoll pollin algo used; not discussed here
    - - Disadv: not phase sharing i.e. only one station might keep utilizin channel leadin to starvation
      - Adv: no slot is wasted
- - - - Protocol says station has to sense if carrier is free or not
      - Collision Detection
        
        no Ack system here; so no way to detect packet loss; so collision detection needed by station itself
        
        for colision detection, Tt > Tp
        
        for worse case: Tt > = 2Tp
        
        For this we also shud have data packets big enough
        
        So L/B >= 2Tp or L >= 2TpBW
        
        if we dont have enough data, we have to have dummy bits
        
        once the collision is detected, we need to retransmit the packets
        
        method for retransmission without collision
  - - - With probablistic analysis we find C = e; now eff. = 1(1+ 6.44a)
- - - - A host has to wait for n-chosen * time-slot