randomcollisionconfig.nc

tinyos2.0版本驱动

/*
 * Copyright (c) 2007, Vanderbilt University
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE VANDERBILT UNIVERSITY BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE VANDERBILT
 * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE VANDERBILT UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE VANDERBILT UNIVERSITY HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Author: Miklos Maroti
 */

interface RandomCollisionConfig
{
	/**
	 * Returns the initial amount of maximum backoff for this message.
	 */
	async command uint16_t getInitialBackoff(message_t* msg);

	/**
	 * Returns the amount of maximum backoff when there is congestion
	 * (the channel was busy for the first try)
	 */
	async command uint16_t getCongestionBackoff(message_t* msg);

	/**
	 * Returns the minimum ticks before the message could be sent.
	 */
	async command uint16_t getMinimumBackoff();

	/**
	 * The provided message was just received, and this command should return 
	 * the time till no transmission should be initiated.
	 */
	async command uint16_t getTransmitBarrier(message_t* msg);
}