Sheduling Protocols - Variations
fixed assignment
- station has designated time slot for sending
- eg, TDMA: Time Division Multiple Access, each station assigned a specific time slot
stations 'reserve' a slot, then send via TDMA
- good when more stations than available slots
- arbitrary protocol can be used for reservations
central control (polling)
- primary polls stations for data in sequence
distributed control
- eg, token passing, station with token can transmit, IEEE 802.4: Token Bus