What[]
Slotted ALOHA is in the class of random access protocols and allows us to support multiple sending nodes on a single channel.
Assumptions[]
- All data frames are the same size
- Time is divided into equal slots
- Nodes are synchronized
- Nodes begin to transmit only at the beginning of slots
- If multiple nodes transmit, nodes detect collision
Operation[]
- When node gets fresh data, transmit in the next slot
- No collision -> success
- Collision: Node retransmits at probabililty p
Efficiency[]
. As N is taken to infinity, the max efficiency of this model goes to .37 or about 1/3
