nes-proj/os/net/mac/tsch/tsch-const.h

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/*
* Copyright (c) 2015, SICS Swedish ICT.
* 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.
*
*/
/**
* \addtogroup tsch
* @{
* \file
* TSCH constants
* \author
* Simon Duquennoy <simonduq@sics.se>
*/
#ifndef __TSCH_CONST_H__
#define __TSCH_CONST_H__
/********** Includes **********/
#include "net/packetbuf.h"
#include "net/mac/tsch/tsch-conf.h" /* Required for timestlot timing consts */
/********** Constants **********/
/* Link options */
#define LINK_OPTION_TX 1
#define LINK_OPTION_RX 2
#define LINK_OPTION_SHARED 4
#define LINK_OPTION_TIME_KEEPING 8
/* Default IEEE 802.15.4e hopping sequences, obtained from https://gist.github.com/twatteyne/2e22ee3c1a802b685695 */
/* 16 channels, sequence length 16 */
#define TSCH_HOPPING_SEQUENCE_16_16 (uint8_t[]){ 16, 17, 23, 18, 26, 15, 25, 22, 19, 11, 12, 13, 24, 14, 20, 21 }
/* 4 channels, sequence length 16 */
#define TSCH_HOPPING_SEQUENCE_4_16 (uint8_t[]){ 20, 26, 25, 26, 15, 15, 25, 20, 26, 15, 26, 25, 20, 15, 20, 25 }
/* 4 channels, sequence length 4 */
#define TSCH_HOPPING_SEQUENCE_4_4 (uint8_t[]){ 15, 25, 26, 20 }
/* 2 channels, sequence length 2 */
#define TSCH_HOPPING_SEQUENCE_2_2 (uint8_t[]){ 20, 25 }
/* 1 channel, sequence length 1 */
#define TSCH_HOPPING_SEQUENCE_1_1 (uint8_t[]){ 20 }
/* Max TSCH packet lenght */
#define TSCH_PACKET_MAX_LEN MIN(127, PACKETBUF_SIZE)
/* The jitter to remove in ticks.
* This should be the sum of measurement errors on Tx and Rx nodes.
* */
#define TSCH_TIMESYNC_MEASUREMENT_ERROR US_TO_RTIMERTICKS(32)
/* The approximate number of slots per second */
#define TSCH_SLOTS_PER_SECOND (1000000 / TSCH_DEFAULT_TS_TIMESLOT_LENGTH)
/* Calculate packet tx/rx duration in rtimer ticks based on sent
* packet len in bytes with 802.15.4 250kbps data rate.
* One byte = 32us. Add two bytes for CRC and one for len field */
#define TSCH_PACKET_DURATION(len) US_TO_RTIMERTICKS(32 * ((len) + 3))
/* Convert rtimer ticks to clock and vice versa */
#define TSCH_CLOCK_TO_TICKS(c) (((c) * RTIMER_SECOND) / CLOCK_SECOND)
#define TSCH_CLOCK_TO_SLOTS(c, timeslot_length) (TSCH_CLOCK_TO_TICKS(c) / timeslot_length)
/* The default timeslot timing in the standard is a guard time of
* 2200 us, a Tx offset of 2120 us and a Rx offset of 1120 us.
* As a result, the listening device has a guard time not centered
* on the expected Tx time. This is to be fixed in the next iteration
* of the standard. This can be enabled with:
* #define TSCH_DEFAULT_TS_TX_OFFSET 2120
* #define TSCH_DEFAULT_TS_RX_OFFSET 1120
* #define TSCH_DEFAULT_TS_RX_WAIT 2200
*
* Instead, we align the Rx guard time on expected Tx time. The Rx
* guard time is user-configurable with TSCH_CONF_RX_WAIT.
* (TS_TX_OFFSET - (TS_RX_WAIT / 2)) instead */
#if TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 10000
/* Default timeslot timing as per IEEE 802.15.4e */
#define TSCH_DEFAULT_TS_CCA_OFFSET 1800
#define TSCH_DEFAULT_TS_CCA 128
#define TSCH_DEFAULT_TS_TX_OFFSET 2120
#define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2))
#define TSCH_DEFAULT_TS_RX_ACK_DELAY 800
#define TSCH_DEFAULT_TS_TX_ACK_DELAY 1000
#define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT
#define TSCH_DEFAULT_TS_ACK_WAIT 400
#define TSCH_DEFAULT_TS_RX_TX 192
#define TSCH_DEFAULT_TS_MAX_ACK 2400
#define TSCH_DEFAULT_TS_MAX_TX 4256
#define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 10000
#elif TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 15000
/* Default timeslot timing for platforms requiring 15ms slots */
#define TSCH_DEFAULT_TS_CCA_OFFSET 1800
#define TSCH_DEFAULT_TS_CCA 128
#define TSCH_DEFAULT_TS_TX_OFFSET 4000
#define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2))
#define TSCH_DEFAULT_TS_RX_ACK_DELAY 3600
#define TSCH_DEFAULT_TS_TX_ACK_DELAY 4000
#define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT
#define TSCH_DEFAULT_TS_ACK_WAIT 800
#define TSCH_DEFAULT_TS_RX_TX 2072
#define TSCH_DEFAULT_TS_MAX_ACK 2400
#define TSCH_DEFAULT_TS_MAX_TX 4256
#define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 15000
#elif TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 65000U
/* 65ms timeslot, i.e. nearly the max length allowed by standard (16-bit unsigned in micro-seconds).
* Useful for running link-layer security on sky in Cooja, where only S/W security is supported.
* Note: this slot timing would require a total of 120ms. If a slot overlaps with the next active slot,
* the latter will be skipped.
* This configuration is mostly a work-around to test link-layer security in Cooja, it is recommended
* to use it with a 6TiSCH minimal schedule of length >= 2. */
#define TSCH_DEFAULT_TS_CCA_OFFSET 1800
#define TSCH_DEFAULT_TS_CCA 128
#define TSCH_DEFAULT_TS_TX_OFFSET 52000
#define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2))
#define TSCH_DEFAULT_TS_RX_ACK_DELAY 58600
#define TSCH_DEFAULT_TS_TX_ACK_DELAY 59000
#define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT
#define TSCH_DEFAULT_TS_ACK_WAIT 800
#define TSCH_DEFAULT_TS_RX_TX 2072
#define TSCH_DEFAULT_TS_MAX_ACK 2400
#define TSCH_DEFAULT_TS_MAX_TX 4256
#define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 65000
#else
#error "TSCH: Unsupported default timeslot length"
#endif
#endif /* __TSCH_CONST_H__ */
/** @} */