Runtime Estimation of the Number of Active Devices in IEEE 802.15.4 Slotted CSMA/CA Networks with Deferred Transmission and No Acknowledgment Using ARMA Filters

Algorithm 1

Pseudocode of the proposed runtime estimation for and in IEEE 802.15.4 slotted CSMA/CA.

;

;

;

// number of superframes

// length of data frame in slots

for each in , reset();

for to do

;

for each in do

for each in , move element from to if ;

if new device(s) is(are) ready to transmit () and then

;

;

for each in do

if then

;

else

if and remaining time in this CAP then

;

else if then

if then

;

;

if then

;

else

;

if remaining time in this CAP and two consecutive slots before the current slot are idle then

;

if then

;

if then

for each in, reset();

for each in , move element from to;

// end of for each in do

for each in do

if then

;

reset();

;

;

function reset()

;

according to and ;

;