Update comments

1 files changed, 7 insertions, 0 deletions

diff --git a/esds.py b/esds.py
index 408f4da..ad08909 100644
--- a/esds.py
+++ b/esds.py
@@ -196,6 +196,11 @@ class Simulator:
     def __init__(self,netmat):
         """
         Format of netmat: { "interface": {"bandwidth": matrix, "latency": matrix, "is_wired":bool}}
+        For wireless interfaces the diagonal of the bandwidth and latency matrix are very important.
+        It determines the duration of the tranmission for THE SENDER. Thus, at each wireless communication,
+        and addionnal event is created for the sender that corresponds to a send to himself (diagonal of the matrices) used
+        to unlock him from the api.send() call. Consequently, duration of the transmission can be 
+        different from the time at which the receivers actually receive the data (non-diagonal entries of the matrices).
         """
         self.netmat=netmat
         self.nodes=list()
@@ -471,6 +476,8 @@ class Simulator:
                 if self.nodes[dst]["turned_on"]:
                     duration=datasize*8/self.netmat[interface]["bandwidth"][src,dst]+self.netmat[interface]["latency"][src,dst]
                     if src == dst:
+                        # This event (where src == dst) is used to notify the sender when data is received!
+                        # Correspond to the diagonal of the network matrices (bandwidth and latency)
                         self.add_event(0,duration+self.time,(src,dst,interface,data,datasize,duration,datasize,self.time))
                     elif not self.interferences:
                         self.add_event(0,duration+self.time,(src,dst,interface,data,datasize,duration,datasize,self.time))