public bool EndEvent(int sendingNodeID, double time)
{
// Returns true if collision occurred
PriorityQueue<L2NodeEntry, double> tempEvents = new PriorityQueue<L2NodeEntry, double>();
L2NodeEntry currentEntry;
double currentTime;
PriorityQueueItem<L2NodeEntry, double> item;
bool collided = false;
while ((SPL_Events.Count > 0) && (SPL_Events.Peek().Priority < -time))
{
item = SPL_Events.Dequeue();
currentTime = -item.Priority;
currentEntry = item.Value;
if ((currentEntry.id == sendingNodeID) & (currentEntry.Collision))
collided = true;
ReceiveLevel = ReceiveLevel + currentEntry.BaseReceiveLevel;
NoiseLevel = NoiseLevel - currentEntry.BaseReceiveLevel;
}
while ((SPL_Events.Count > 0) && (SPL_Events.Peek().Priority == time))
{
item = SPL_Events.Dequeue();
if (item.Value.id != sendingNodeID)
tempEvents.Enqueue(item);
else
{
currentEntry = item.Value;
if (currentEntry.Collision)
collided = true;
if (currentID == sendingNodeID)
{
ReceiveLevel = 0;
}
else if (ReceiveLevel != 0)
{
ReceiveLevel = ReceiveLevel + currentEntry.BaseReceiveLevel;
}
NoiseLevel = NoiseLevel - currentEntry.BaseReceiveLevel;
}
}
while (tempEvents.Count > 0)
{
SPL_Events.Enqueue((PriorityQueueItem<L2NodeEntry, double>)tempEvents.Dequeue());
}
return collided;
}
public L2NodeEntry(int id, SPL bRL, bool collided)
{
this.id = id;
this.BaseReceiveLevel = bRL;
Collision = collided;
}
public void StartEvent(int sendingNodeID, double BaseReceiveLevel, double time, double duration)
{
bool thisCollided = false;
bool prevCollided = false;
L2NodeEntry l2Entry;
if (BaseReceiveLevel > NoiseLevel)
{
ReceiveLevel = (SPL)BaseReceiveLevel - NoiseLevel;
NoiseLevel = NoiseLevel + (SPL)BaseReceiveLevel;
if (isReceiving)
{
prevCollided = true;
l2Entry = new L2NodeEntry(currentID, double.NegativeInfinity, prevCollided);
SPL_Events.Enqueue(l2Entry, -currentEndTime);
}
currentID = sendingNodeID;
currentEndTime = time + duration;
}
else
{
ReceiveLevel = ReceiveLevel - (SPL)BaseReceiveLevel;
NoiseLevel = NoiseLevel + (SPL)BaseReceiveLevel;
}
thisCollided = (ReceiveLevel > MinReceiveLevel);
l2Entry = new L2NodeEntry(sendingNodeID, BaseReceiveLevel, thisCollided);
SPL_Events.Enqueue(l2Entry, -(time + duration));
}
