Fault Activity Aware Service Delivery in Wireless Sensor Networks for Smart Cities

Algorithm 1

FAGOR algorithm.

Require: , the neighbor set of node

Ensure: the next forwarder

() start a retransmission timer;

() select the forwarding set including candidates from

neighbor nodes ;

() for each node do

() if and

then

() add to ; ;

() end if

() end for

() prioritize the forwarder set using metric;

() broadcast the data packets;

() for each node do

() receive the data packet;

() check the sender ID and start a timer and ,

where is a constant;

() end for

() if node which obtains the highest priority receives the data

packet correctly then

() reply an ACK to notify the sender as well as other candidates

to cancel their timers;

() else

() if the priority timer expire then

() set , node has the lower-priority;

() goto 14;

() end if

() end if

() if no forwarding candidate has successfully received the packet

then

() if the retransmission timer does not expire then

() goto 2;

() end if

() end if

() return