129 lines
4.8 KiB
C
129 lines
4.8 KiB
C
/**
|
|
* \addtogroup rime
|
|
* @{
|
|
*/
|
|
/**
|
|
* \defgroup rimelinkestimate Link estimate management
|
|
*
|
|
* The link estimate module is used for computing estimations of link
|
|
* quality. It computes a quality index for links, based on
|
|
* information about how many times a packet has been transmitted, as
|
|
* well as information about incoming packets. The link estimate
|
|
* module exposes an interface that provides functions that are called
|
|
* for incoming and outgoing packets.
|
|
*/
|
|
/*
|
|
* Copyright (c) 2010, Swedish Institute of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* $Id: collect-link-estimate.h,v 1.3 2010/10/03 20:06:25 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Header file for the Collect link estimate
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#ifndef COLLECT_LINK_ESTIMATE_H
|
|
#define COLLECT_LINK_ESTIMATE_H
|
|
|
|
#define COLLECT_LINK_ESTIMATE_UNIT 8
|
|
|
|
|
|
|
|
|
|
#define COLLECT_LINK_ESTIMATE_HISTORY_SIZE 16
|
|
|
|
struct collect_link_estimate {
|
|
uint8_t history[COLLECT_LINK_ESTIMATE_HISTORY_SIZE];
|
|
uint8_t historyptr;
|
|
uint8_t num_estimates;
|
|
};
|
|
|
|
/**
|
|
* \brief Initialize a new link estimate
|
|
* \param le A pointer to a link estimate structure
|
|
*
|
|
* This function initializes a link estimate.
|
|
*/
|
|
void collect_link_estimate_new(struct collect_link_estimate *le);
|
|
|
|
/**
|
|
* \brief Update a link estimate when a packet has been sent.
|
|
* \param le A pointer to a link estimate structure
|
|
* \param num_tx The number of times the packet was transmitted before it was ACKed
|
|
*
|
|
* This function updates a link estimate. This function is
|
|
* called when a packet has been sent. The function may
|
|
* use information from the packet buffer and the packet
|
|
* buffer attributes when computing the link estimate.
|
|
*/
|
|
void collect_link_estimate_update_tx(struct collect_link_estimate *le,
|
|
uint8_t num_tx);
|
|
|
|
/**
|
|
* \brief Update a link estimate when a packet has failed to be sent.
|
|
* \param le A pointer to a link estimate structure
|
|
* \param num_tx The number of times the packet was transmitted before it was given up on.
|
|
*
|
|
* This function updates a link estimate. This function is
|
|
* called when a packet has been sent. The function may
|
|
* use information from the packet buffer and the packet
|
|
* buffer attributes when computing the link estimate.
|
|
*/
|
|
void collect_link_estimate_update_tx_fail(struct collect_link_estimate *le,
|
|
uint8_t num_tx);
|
|
|
|
/**
|
|
* \brief Update a link estimate when a packet has been received.
|
|
* \param le A pointer to a link estimate structure
|
|
*
|
|
* This function updates a link estimate. This function is
|
|
* called when a packet has been received. The function
|
|
* uses information from the packet buffer and its
|
|
* attributes.
|
|
*/
|
|
void collect_link_estimate_update_rx(struct collect_link_estimate *le);
|
|
|
|
|
|
/**
|
|
* \brief Compute the link estimate metric for a link estimate
|
|
* \param le A pointer to a link estimate structure
|
|
* \return The current link estimate metric
|
|
*
|
|
*/
|
|
uint16_t collect_link_estimate(struct collect_link_estimate *le);
|
|
|
|
int collect_link_estimate_num_estimates(struct collect_link_estimate *le);
|
|
|
|
#endif /* COLLECT_LINK_ESTIMATE_H */
|
|
|
|
/** @} */
|