Carrier Sense Multiple Access(CSMA) In certain situations nodes can hear each other by listening to the channel “Carrier Sensing CSMA: Polite version of Aloha Nodes listen to the channel before they start transmission Channel idle=> Transmit Channel busy = Wait (join backlog) When do backlogged nodes transmit? When channel becomes idle backlogged nodes attempt transmission with probability q=1 Persistent protocol, q=1 Non-persistent protocol,< 1
UNIT 1: PROBLEMS 1. A reaction has the stoichiometric equation A+B=2R. What is the order of reaction? 2. A reaction with stoichiometric equation +B=R+IS has the following rate expression r.= What is the rate expression for this reaction if the stoichiometric equation is written as A+2B=2R+S?
1. A reaction has the stoichiometric equation A+B=2R. What is the order of reaction? 2. A reaction with stoichiometric equation +B=R+IS has the following rate expression r.= What is the rate expression for this reaction if the stoichiometric equation is written as A+2B=2R+S?