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ALOHA Protocols
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Abstract
ALOHA protocols deal with largely uncoordinated packet transmissions by multiple senders, where the senders all learn of success or collision via a common feedback channel. Slotted ALOHA involves sending fixed‐size packets in random time slots. Unslotted ALOHA involves sending variable‐size packets at any starting time. The article provides a brief analysis of ALOHA efficiency and stability, and explains some modifications to ALOHA that improve these properties. The improvements include collision resolution algorithms, reservation ALOHA, multichannel ALOHA, capture ALOHA, multibase ALOHA, and nonbinary ALOHA. Also discussed is the use of ALOHA with a time constraint and CDMA‐related spread ALOHA.
Title: ALOHA
Protocols
Description:
Abstract
ALOHA protocols deal with largely uncoordinated packet transmissions by multiple senders, where the senders all learn of success or collision via a common feedback channel.
Slotted ALOHA involves sending fixed‐size packets in random time slots.
Unslotted ALOHA involves sending variable‐size packets at any starting time.
The article provides a brief analysis of ALOHA efficiency and stability, and explains some modifications to ALOHA that improve these properties.
The improvements include collision resolution algorithms, reservation ALOHA, multichannel ALOHA, capture ALOHA, multibase ALOHA, and nonbinary ALOHA.
Also discussed is the use of ALOHA with a time constraint and CDMA‐related spread ALOHA.
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