//
// This file is part of an OMNeT++/OMNEST simulation example.
//
// Copyright (C) 1992-2015 Andras Varga
//
// This file is distributed WITHOUT ANY WARRANTY. See the file
// `license' for details on this and other legal matters.
//

//
// The central computer in the ALOHAnet network.
//
simple Server
{
    parameters:
        @display("i=device/antennatower_l");
        @signal[receiveBegin](type="long");  // increases with each new frame arriving to the server and drops to 0 if the channel becomes finally idle
        @signal[receive](type="long");  // for successful receptions (non-collisions): 1 at the start of the reception, 0 at the end of the reception
        @signal[collision](type="long"); // the number of collided frames at the beginning of the collision period
        @signal[collisionLength](type="simtime_t");  // the length of the last collision period at the end of the collision period
        @signal[channelState](type="long");

        double x @unit(m); // the x coordinate of the server
        double y @unit(m); // the y coordinate of the server

        double animationHoldTimeOnCollision @unit(s) = default(0s); // in animation time

        @statistic[serverChannelState](source="channelState";title="Channel state";enum="IDLE=0,TRANSMISSION=1,COLLISION=2";record=vector);
        @statistic[receiveBegin](source="receiveBegin"; record=vector?; interpolationmode=sample-hold; title="receive begin");
        @statistic[channelUtilization](source="timeavg(receive)"; record=last; interpolationmode=linear; title="channel utilization");
        @statistic[collisionMultiplicity](source=collision; record=vector?,histogram; title="collision multiplicity");
        @statistic[collisionLength](record=vector?,histogram,mean,sum,max; title="collision length");
        @statistic[receivedFrames](source="sum(receive)"; record=last; title="received frames");
        @statistic[collidedFrames](source="sum(collision)"; record=last; title="collided frames");
    gates:
        input in @directIn;
}