1 files changed, 25 insertions, 0 deletions
diff --git a/3446/CH6/EX6.9/Ex6_9.sce b/3446/CH6/EX6.9/Ex6_9.sce
new file mode 100644
index 000000000..299b0639a
--- /dev/null
+++ b/3446/CH6/EX6.9/Ex6_9.sce
@@ -0,0 +1,25 @@
+// Exa 6.9
+// To calculate the normalized throughput with: 
+//(a) an unslotted nonpersistent,
+//(b) a slotted persistent, and
+//(c) a slotted 1-persistent CSMA protocol.
+
+clc;
+clear all;
+
+e=2.71828; //Euler's number
+Tprop=0.4; //Max propogation delay in sec
+R=10; //data rate in Mbps
+PackLen=400; //packet length in bits
+
+//solution
+Tp=PackLen/R; //packet transmission time in microsec
+a=Tprop/Tp;
+G=Tp*10^-6*R*10^6/PackLen;//normalized offered trafﬁc load 
+//Slotted nonpersistent
+S0=a*G*e^(-a*G)/(1-e^(-a*G)+a);//normalized throughput 
+//Unslotted nonpersistent
+S1=G*e^(-a*G)/(1+(2*a)+e^(-a*G));//normalized throughput 
+//Slotted 1-persistent
+S2=G*e^(-G*(1+a))*(1+a-e^(-a*G))/((1+a)*(1-e^(-a*G))+a*e^(-G*(1+a)));//normalized throughput 
+printf('The Normalized throughput with an unslotted non persistent, a slotted persistent and a slotted 1-persistent CSMA protocol are \n %.3f,%.3f and %.3f respectively \n',S0,S1,S2);