mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-14 09:28:59 +00:00
Rework of the timing conditions of ContikiMAC: the old timing did not work well on real hardware, the new one seems to work better
This commit is contained in:
parent
cc7d3ae142
commit
79722b4247
@ -28,7 +28,7 @@
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*
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*
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* This file is part of the Contiki operating system.
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* This file is part of the Contiki operating system.
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*
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*
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* $Id: contikimac.c,v 1.8 2010/03/01 13:30:22 nifi Exp $
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* $Id: contikimac.c,v 1.9 2010/03/09 13:19:05 adamdunkels Exp $
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*/
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*/
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/**
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/**
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@ -60,7 +60,7 @@
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#include <string.h>
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#include <string.h>
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#ifndef WITH_ACK_OPTIMIZATION
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#ifndef WITH_ACK_OPTIMIZATION
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#define WITH_ACK_OPTIMIZATION 1
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#define WITH_ACK_OPTIMIZATION 0
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#endif
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#endif
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#ifndef WITH_PHASE_OPTIMIZATION
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#ifndef WITH_PHASE_OPTIMIZATION
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#define WITH_PHASE_OPTIMIZATION 1
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#define WITH_PHASE_OPTIMIZATION 1
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@ -98,14 +98,16 @@ struct announcement_msg {
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#endif
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#endif
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#define CCA_COUNT_MAX 2
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#define CCA_COUNT_MAX 2
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#define CCA_CHECK_TIME (RTIMER_ARCH_SECOND / 8192)
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#define CCA_CHECK_TIME RTIMER_ARCH_SECOND / 8192
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#define CCA_SLEEP_TIME (RTIMER_ARCH_SECOND / 1500)
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#define CCA_SLEEP_TIME RTIMER_ARCH_SECOND / 2000 + CCA_CHECK_TIME
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#define CHECK_TIME (CCA_COUNT_MAX * (CCA_CHECK_TIME + CCA_SLEEP_TIME))
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#define CHECK_TIME (CCA_COUNT_MAX * (CCA_CHECK_TIME + CCA_SLEEP_TIME))
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#define LISTEN_TIME (RTIMER_ARCH_SECOND / 150)
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#define INTER_PACKET_INTERVAL RTIMER_ARCH_SECOND / 2500
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#define AFTER_ACK_DETECTECT_WAIT_TIME RTIMER_ARCH_SECOND / 1500
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#define WAIT_TIME_BEFORE_STROBE_ACK_CCA RTIMER_ARCH_SECOND / 3000
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#define LISTEN_TIME_AFTER_PACKET_DETECTED RTIMER_ARCH_SECOND / 100
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#define WAIT_TIME_AFTER_STROBE_ACK_CCA RTIMER_ARCH_SECOND / 1500
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#define SHORTEST_PACKET_SIZE 18
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/* The cycle time for announcements. */
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/* The cycle time for announcements. */
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#define ANNOUNCEMENT_PERIOD 4 * CLOCK_SECOND
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#define ANNOUNCEMENT_PERIOD 4 * CLOCK_SECOND
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@ -158,7 +160,7 @@ static struct compower_activity current_packet;
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#include "net/mac/phase.h"
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#include "net/mac/phase.h"
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#define MAX_PHASE_NEIGHBORS 4
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#define MAX_PHASE_NEIGHBORS 30
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PHASE_LIST(phase_list, MAX_PHASE_NEIGHBORS);
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PHASE_LIST(phase_list, MAX_PHASE_NEIGHBORS);
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@ -181,6 +183,14 @@ static volatile uint16_t packet_indicated_but_not_received,
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volatile uint16_t
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volatile uint16_t
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packet_indicated_but_not_received_clear_second_time;
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packet_indicated_but_not_received_clear_second_time;
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struct cca_checks_stats {
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volatile char check[CCA_COUNT_MAX];
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};
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#define LATEST_CCA_CHECKS_NUM 16
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static volatile struct cca_checks_stats cca_checks[LATEST_CCA_CHECKS_NUM];
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static volatile struct cca_checks_stats *latest_cca_check = &cca_checks[LATEST_CCA_CHECKS_NUM - 1];
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/*---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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static void
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static void
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on(void)
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on(void)
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@ -271,9 +281,18 @@ powercycle(struct rtimer *t, void *ptr)
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cycle_start = RTIMER_NOW();
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cycle_start = RTIMER_NOW();
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for(count = 1; count < LATEST_CCA_CHECKS_NUM; ++count) {
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cca_checks[count - 1] = cca_checks[count];
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}
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latest_cca_check->check[0] =
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latest_cca_check->check[1] = 2;
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packet_seen = 0;
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packet_seen = 0;
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clear_second_time = clear_third_time = 0;
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clear_second_time = clear_third_time = 0;
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if(we_are_sending == 0) {
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if(we_are_sending == 0) {
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latest_cca_check->check[0] =
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latest_cca_check->check[1] = -1;
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for(count = 0; count < CCA_COUNT_MAX; ++count) {
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for(count = 0; count < CCA_COUNT_MAX; ++count) {
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t0 = RTIMER_NOW();
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t0 = RTIMER_NOW();
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powercycle_turn_radio_on();
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powercycle_turn_radio_on();
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@ -283,15 +302,19 @@ powercycle(struct rtimer *t, void *ptr)
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while(RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + CCA_CHECK_TIME));
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while(RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + CCA_CHECK_TIME));
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#endif
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#endif
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if(NETSTACK_RADIO.channel_clear() == 0) {
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if(NETSTACK_RADIO.channel_clear() == 0) {
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latest_cca_check->check[count] = 0;
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packet_indication_flag = 1;
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packet_indication_flag = 1;
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packet_seen = 1;
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packet_seen = 1;
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break;
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break;
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} else {
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latest_cca_check->check[count] = 1;
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}
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}
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powercycle_turn_radio_off();
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powercycle_turn_radio_off();
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schedule_powercycle(t, CCA_SLEEP_TIME + CCA_CHECK_TIME);
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schedule_powercycle(t, CCA_SLEEP_TIME + CCA_CHECK_TIME);
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PT_YIELD(&pt);
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PT_YIELD(&pt);
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}
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}
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#if 1
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/* If there were a packet in the air, turn radio on */
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/* If there were a packet in the air, turn radio on */
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if(packet_seen) {
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if(packet_seen) {
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static rtimer_clock_t start;
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static rtimer_clock_t start;
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@ -301,7 +324,7 @@ powercycle(struct rtimer *t, void *ptr)
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periods = silence_periods = 0;
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periods = silence_periods = 0;
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while(we_are_sending == 0 && radio_is_on &&
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while(we_are_sending == 0 && radio_is_on &&
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RTIMER_CLOCK_LT(RTIMER_NOW(), (start + LISTEN_TIME))) {
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RTIMER_CLOCK_LT(RTIMER_NOW(), (start + LISTEN_TIME_AFTER_PACKET_DETECTED))) {
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/* Check for two consecutive periods of non-activity. If we
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/* Check for two consecutive periods of non-activity. If we
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see two such periods, we turn the radio off. Also, if a
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see two such periods, we turn the radio off. Also, if a
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@ -319,7 +342,8 @@ powercycle(struct rtimer *t, void *ptr)
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if(NETSTACK_RADIO.receiving_packet()) {
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if(NETSTACK_RADIO.receiving_packet()) {
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silence_periods = 0;
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silence_periods = 0;
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}
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}
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if(silence_periods > 3) {
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if(silence_periods > 5) {
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latest_cca_check->check[count] = -silence_periods;
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leds_on(LEDS_RED);
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leds_on(LEDS_RED);
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powercycle_turn_radio_off();
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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#if CONTIKIMAC_CONF_COMPOWER
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@ -328,7 +352,9 @@ powercycle(struct rtimer *t, void *ptr)
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leds_off(LEDS_RED);
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leds_off(LEDS_RED);
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break;
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break;
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}
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}
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if(periods > 4 && !NETSTACK_RADIO.receiving_packet()) {
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if(periods > 10 && !(NETSTACK_RADIO.receiving_packet() ||
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NETSTACK_RADIO.pending_packet())) {
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latest_cca_check->check[count] = periods;
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leds_on(LEDS_GREEN);
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leds_on(LEDS_GREEN);
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powercycle_turn_radio_off();
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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#if CONTIKIMAC_CONF_COMPOWER
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@ -347,7 +373,9 @@ powercycle(struct rtimer *t, void *ptr)
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PT_YIELD(&pt);
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PT_YIELD(&pt);
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leds_off(LEDS_BLUE);
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leds_off(LEDS_BLUE);
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}
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}
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if(radio_is_on && !NETSTACK_RADIO.pending_packet) {
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if(radio_is_on && !(NETSTACK_RADIO.receiving_packet() &&
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NETSTACK_RADIO.pending_packet())) {
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latest_cca_check->check[count] = -78;
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leds_on(LEDS_RED + LEDS_GREEN);
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leds_on(LEDS_RED + LEDS_GREEN);
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powercycle_turn_radio_off();
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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#if CONTIKIMAC_CONF_COMPOWER
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@ -361,6 +389,19 @@ powercycle(struct rtimer *t, void *ptr)
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compower_accumulate(&compower_idle_activity);
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compower_accumulate(&compower_idle_activity);
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#endif /* CONTIKIMAC_CONF_COMPOWER */
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#endif /* CONTIKIMAC_CONF_COMPOWER */
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}
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}
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#else /* 0 */
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if(packet_seen) {
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schedule_powercycle(t, LISTEN_TIME);
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PT_YIELD(&pt);
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if(!(NETSTACK_RADIO.receiving_packet() ||
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NETSTACK_RADIO.pending_packet())) {
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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compower_accumulate(&compower_idle_activity);
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#endif /* CONTIKIMAC_CONF_COMPOWER */
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}
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}
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#endif /* 0 */
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/* If the packet indication flag is still set, it means that
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/* If the packet indication flag is still set, it means that
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there was never a packet received by the radio. We increase
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there was never a packet received by the radio. We increase
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@ -452,6 +493,12 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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int transmit_len;
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int transmit_len;
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int i;
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int i;
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if(packetbuf_totlen() == 0) {
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PRINTF("contikimac: send_packet data len 0\n");
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return MAC_TX_ERR_FATAL;
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}
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#if WITH_PHASE_OPTIMIZATION
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#if WITH_PHASE_OPTIMIZATION
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#if WITH_ACK_OPTIMIZATION
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#if WITH_ACK_OPTIMIZATION
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/* Wait until the receiver is expected to be awake */
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/* Wait until the receiver is expected to be awake */
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@ -459,19 +506,28 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
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PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
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if(phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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if(phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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CYCLE_TIME, 5 * CHECK_TIME,
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CYCLE_TIME, 6 * CHECK_TIME,
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mac_callback, mac_callback_ptr) == PHASE_DEFERRED) {
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mac_callback, mac_callback_ptr) == PHASE_DEFERRED) {
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return MAC_TX_DEFERRED;
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return MAC_TX_DEFERRED;
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}
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}
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}
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}
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#else /* WITH_ACK_OPTIMIZATION */
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#else /* WITH_ACK_OPTIMIZATION */
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if(is_streaming == 0) {
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if(phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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if(phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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CYCLE_TIME, 5 * CHECK_TIME) == PHASE_DEFERRED) {
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CYCLE_TIME, 6 * CHECK_TIME,
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mac_callback, mac_callback_ptr) == PHASE_DEFERRED) {
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return MAC_TX_DEFERRED;
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return MAC_TX_DEFERRED;
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}
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}
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}
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#endif /* WITH_ACK_OPTIMIZATION */
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#endif /* WITH_ACK_OPTIMIZATION */
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#endif /* WITH_PHASE_OPTIMIZATION */
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#endif /* WITH_PHASE_OPTIMIZATION */
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/* Make sure that the packet is longer or equal to the shorest
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packet length. */
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if(packetbuf_totlen() < SHORTEST_PACKET_SIZE) {
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PRINTF("contikimac: shorter than shortest (%d)\n", packetbuf_totlen());
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packetbuf_set_datalen(SHORTEST_PACKET_SIZE);
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}
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/* Create the MAC header for the data packet. */
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/* Create the MAC header for the data packet. */
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packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
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packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
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@ -584,6 +640,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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if(collisions > 0) {
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if(collisions > 0) {
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we_are_sending = 0;
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we_are_sending = 0;
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off();
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off();
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PRINTF("contikimac: collisions before sending\n");
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return MAC_TX_COLLISION;
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return MAC_TX_COLLISION;
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}
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}
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@ -614,7 +671,9 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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rtimer_clock_t wt;
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rtimer_clock_t wt;
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rtimer_clock_t now = RTIMER_NOW();
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rtimer_clock_t now = RTIMER_NOW();
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leds_on(LEDS_RED);
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NETSTACK_RADIO.transmit(transmit_len);
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NETSTACK_RADIO.transmit(transmit_len);
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leds_off(LEDS_RED);
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if(!is_broadcast) {
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if(!is_broadcast) {
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on();
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on();
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}
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}
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@ -624,10 +683,10 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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wt = RTIMER_NOW();
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wt = RTIMER_NOW();
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#if NURTIMER
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#if NURTIMER
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while(RTIMER_CLOCK_LT
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while(RTIMER_CLOCK_LT
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(wt, RTIMER_NOW(), wt + WAIT_TIME_BEFORE_STROBE_ACK_CCA));
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(wt, RTIMER_NOW(), wt + INTER_PACKET_INTERVAL));
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#else
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#else
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while(RTIMER_CLOCK_LT
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while(RTIMER_CLOCK_LT
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(RTIMER_NOW(), wt + WAIT_TIME_BEFORE_STROBE_ACK_CCA)) { }
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(RTIMER_NOW(), wt + INTER_PACKET_INTERVAL)) { }
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#endif
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#endif
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if(!is_broadcast && (NETSTACK_RADIO.receiving_packet() ||
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if(!is_broadcast && (NETSTACK_RADIO.receiving_packet() ||
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NETSTACK_RADIO.pending_packet() ||
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NETSTACK_RADIO.pending_packet() ||
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@ -636,10 +695,10 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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wt = RTIMER_NOW();
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wt = RTIMER_NOW();
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#if NURTIMER
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#if NURTIMER
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while(RTIMER_CLOCK_LT
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while(RTIMER_CLOCK_LT
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(wt, RTIMER_NOW(), wt + WAIT_TIME_AFTER_STROBE_ACK_CCA));
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(wt, RTIMER_NOW(), wt + AFTER_ACK_DETECTECT_WAIT_TIME));
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#else
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#else
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while(RTIMER_CLOCK_LT
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while(RTIMER_CLOCK_LT
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(RTIMER_NOW(), wt + WAIT_TIME_AFTER_STROBE_ACK_CCA)) { }
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(RTIMER_NOW(), wt + AFTER_ACK_DETECTECT_WAIT_TIME)) { }
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#endif
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#endif
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len = NETSTACK_RADIO.read(ackbuf, ACK_LEN);
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len = NETSTACK_RADIO.read(ackbuf, ACK_LEN);
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if(len == ACK_LEN) {
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if(len == ACK_LEN) {
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@ -647,6 +706,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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encounter_time = now;
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encounter_time = now;
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packet_indication_flag = 0;
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packet_indication_flag = 0;
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} else {
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} else {
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PRINTF("contikimac: collisions while sending\n");
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packet_indication_flag = 0;
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packet_indication_flag = 0;
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collisions++;
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collisions++;
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}
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}
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@ -669,10 +729,16 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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#endif /* WITH_ACK_OPTIMIZATION */
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#endif /* WITH_ACK_OPTIMIZATION */
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#if WITH_PHASE_OPTIMIZATION
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#if WITH_PHASE_OPTIMIZATION
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#if WITH_ACK_OPTIMIZATION
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if(got_strobe_ack && packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
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if(got_strobe_ack && packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
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PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
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PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
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phase_register(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time);
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phase_register(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time);
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}
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}
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#else /* WITH_ACK_OPTIMIZATION */
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if(got_strobe_ack && is_streaming == 0) {
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phase_register(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time);
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}
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#endif /* WITH_ACK_OPTIMIZATION */
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#endif /* WITH_PHASE_OPTIMIZATION */
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#endif /* WITH_PHASE_OPTIMIZATION */
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PRINTF("contikimac: send (strobes=%u,len=%u,%s), done\n", strobes,
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PRINTF("contikimac: send (strobes=%u,len=%u,%s), done\n", strobes,
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@ -890,38 +956,10 @@ const struct rdc_driver contikimac_driver = {
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uint16_t
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uint16_t
|
||||||
contikimac_debug_print(void)
|
contikimac_debug_print(void)
|
||||||
{
|
{
|
||||||
uint16_t c1, c2;
|
int i;
|
||||||
uint16_t indicated, clear_second, clear_third;
|
for(i = 0; i < LATEST_CCA_CHECKS_NUM; ++i) {
|
||||||
static uint16_t indicated_last, clear_second_last, clear_third_last;
|
printf("%d: %d, %d\n", i, cca_checks[i].check[0], cca_checks[i].check[1]);
|
||||||
|
}
|
||||||
do {
|
|
||||||
c1 = packet_indicated_but_not_received;
|
|
||||||
c2 = packet_indicated_but_not_received;
|
|
||||||
} while(c1 != c2);
|
|
||||||
|
|
||||||
indicated = c1;
|
|
||||||
|
|
||||||
do {
|
|
||||||
c1 = packet_indicated_but_not_received_clear_second_time;
|
|
||||||
c2 = packet_indicated_but_not_received_clear_second_time;
|
|
||||||
} while(c1 != c2);
|
|
||||||
|
|
||||||
clear_second = c1;
|
|
||||||
|
|
||||||
do {
|
|
||||||
c1 = packet_indicated_but_not_received_clear_third_time;
|
|
||||||
c2 = packet_indicated_but_not_received_clear_third_time;
|
|
||||||
} while(c1 != c2);
|
|
||||||
|
|
||||||
clear_third = c1;
|
|
||||||
|
|
||||||
printf("indicated %d clear second %d clear_third %d\n",
|
|
||||||
indicated - indicated_last,
|
|
||||||
clear_second - clear_second_last,
|
|
||||||
clear_third - clear_third_last);
|
|
||||||
indicated_last = indicated;
|
|
||||||
clear_second_last = clear_second;
|
|
||||||
clear_third_last = clear_third;
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
/*---------------------------------------------------------------------------*/
|
/*---------------------------------------------------------------------------*/
|
||||||
|
Loading…
Reference in New Issue
Block a user