adamdunkels
6d556d5c13
Fixed bug with link-layer ACKs. Refactored the ACK reception code.
2010-11-25 08:44:34 +00:00
nifi
3bd78893e5
Renamed nullrdc to nullrdc-noframer and nullrdc-framer to nullrdc.
...
nullrdc (previously nullrdc-framer) is now a RDC implementation that
does not do any radio duty cycling but supports link layer addresses
and frame format via framer (for example 802.15.4). nullrdc can now be
used in the same way as contikimac, xmac, etc.
nullrdc-noframer (previously nullrdc) is a null RDC implementation
that does not do any radio duty cycling, does not add any header of its
own to the packets, and does not support link layer addresses.
2010-11-23 18:11:00 +00:00
nifi
05d78522d3
Added MAC-layer duplicate message suppression when using 802.15.4 auto ack
2010-11-12 12:53:16 +00:00
adamdunkels
b7df18a96a
Turned off streaming by default to save code space; made guard time a little more conservative
2010-11-02 11:00:08 +00:00
adamdunkels
8fa7bf6c31
Always restore the queuebuf to the packetbuf before calling the upper layers. Reduce the waiting time between successive MAC layer retransmissions.
2010-10-24 21:07:00 +00:00
adamdunkels
73f5535754
Made the guard time slightly more conservative - found an occasion where this was needed
2010-10-24 21:06:17 +00:00
adamdunkels
9cb830ed37
Timing bugfix in the waiting period between channel samples to check if the coast is clear before sending a packet.
2010-10-20 22:25:24 +00:00
adamdunkels
3ffcff0656
Added mechanisms for explicit de-synchronization of synchronized neighbors. Added link-layer ACKs. Fixed bugs with MAC-layer interaction. Now seems to work somewhat (didn't work at all before, in some cases), but there are still problems with packet loss.
2010-10-20 15:23:43 +00:00
nifi
e2b4956a7f
Bug fix: release the packet and notify the sender if RDC returned an error
2010-10-14 19:08:39 +00:00
joxe
4f3fc1c404
fixed xmac to use new channel check define name
2010-10-03 22:46:53 +00:00
adamdunkels
ceebd7020a
Bugfix: the return value sometimes was wrong when a collision was detected.
2010-10-03 20:39:24 +00:00
adamdunkels
ae88ed04f1
Moved the definition of the channel check rate used by the radio duty
...
cycling layer. This definition was previously held in net/mac/mac.h,
with the name MAC_CONF_CHANNEL_CHECK_RATE. But since the rate is used
by the radio duty cycling layer, it makes more sense to change its
name to reflect this. Also, the configuration option should be tied to
the netstack configuration instead.
So the new configuration option is called
NETSTACK_CONF_RDC_CHANNEL_CHECK_RATE.
2010-10-03 20:37:32 +00:00
adamdunkels
eb58968459
Added a timer to each phase structure that keeps track of for how long
...
a particular receiver has not ACKed packets. After some time
(currently 16 seconds), the sender will begin sending full strobe
periods again.
2010-09-13 13:39:05 +00:00
dak664
12479c32bc
Fix compiler warnings
2010-08-01 21:18:07 +00:00
nifi
21828ad782
Changed the retransmission time to be based on the configured MAC channel check rate when the RDC has no channel check interval.
2010-06-16 10:08:30 +00:00
adamdunkels
7647cbd8aa
Use the list_item_next() API
2010-06-15 19:22:25 +00:00
adamdunkels
3fa8ffda1a
Moved the modules packetbuf, queuebuf, and packetqueue from net/rime to net/, since they are not Rime-specific
2010-06-14 19:19:16 +00:00
adamdunkels
951fd78f6c
ctimer moved from net/rime to sys/
2010-06-14 18:58:45 +00:00
adamdunkels
8f8393aadc
Moved ctimer.[ch] from their old and illogical location in core/net/rime to a more appropriate place in core/sys
2010-06-14 07:34:36 +00:00
adamdunkels
8d1680fed5
Filter duplicate packets
2010-06-14 06:52:41 +00:00
nifi
ac9b862cd0
Added configurable support for 802.15.4 autoack
2010-05-26 14:12:33 +00:00
nvt-se
b8a3a4109e
Adjusted the code so as to remove compilation warnings.
2010-04-30 22:18:12 +00:00
adamdunkels
0859d4b95f
Avoid turning off the radio in the middle of a packet reception
2010-04-30 07:32:39 +00:00
adamdunkels
e606c674c2
Rewrote LPP so that it uses 802.15.4 headers. A number of bugfixes with respect to alignment. Avoid turning off the radio in the middle of packet reception.
2010-04-30 07:31:44 +00:00
adamdunkels
3c735fcea4
Added a packetbuf flag that indicates if the link layer acks should be used or not
2010-04-30 07:25:51 +00:00
fros4943
12b6f35ce7
PRINTF()ed debugging output
2010-04-27 12:56:35 +00:00
nifi
85d6f6c514
removed unused variable
2010-04-26 22:41:50 +00:00
nifi
b26f45a35b
code cleanup
2010-04-26 17:55:11 +00:00
nifi
d761b6e89a
Added MAC header to handle padding
2010-04-26 17:46:21 +00:00
nifi
14b1bb9f57
Fixed to only use leds when DEBUG is set
2010-04-20 11:41:16 +00:00
adamdunkels
3670fac618
Bugfix: timing fixed
2010-04-08 18:23:24 +00:00
adamdunkels
91ff8574ad
Improved handling of duplicate packets
2010-04-08 09:32:56 +00:00
nvt-se
ac4ba199bc
Turn off DEBUG mode by default.
2010-04-06 21:37:54 +00:00
adamdunkels
497111bcc9
Added an optional rate limit for broadcast transmissions
2010-04-06 11:57:43 +00:00
adamdunkels
e06a30fdb0
Added MAC-layer duplicate message suppression, which is very helpful when running with duty cycling turned off
2010-04-05 19:28:07 +00:00
adamdunkels
c68ee6e577
Bugfix: memory from the wrong memb was freed.
2010-04-04 21:02:09 +00:00
adamdunkels
a4c328785a
Small timing tweaks
2010-04-04 21:01:24 +00:00
adamdunkels
62039a530d
Removed non-existant cooja-debug.h include
2010-04-04 12:31:47 +00:00
adamdunkels
7d6ff0289e
Fiddled more with the timing: the phase seems stable now at least. Still bugs left though...
2010-04-04 12:28:29 +00:00
adamdunkels
be117afe04
After a lot of tweaking and twiddling with the timing of the ContikiMAC code and the mechanisms in the CC2420 driver, things seem to work somewhat stable now - knock on wood!
2010-04-04 07:49:30 +00:00
adamdunkels
121ca946e1
Improved phase lock behaviour when neighbor is not duty cycling: senders notify receivers via the 802.15.4 pending bit that they are not duty cycling. Neighbors then will start sending packets immediately and not wait for neighbors' phase. Tweaking of ContikiMAC timers to make it more reliable.
2010-04-03 13:28:30 +00:00
joxe
6ae86d001d
made number of phase neighbors configurable
2010-04-01 17:17:36 +00:00
adamdunkels
add426de4b
Bugfixed stream mode: node listens 100% for 0.5 seconds in stream mode. Naming change: is_listening changed is_snooping.
2010-04-01 10:02:04 +00:00
adamdunkels
b43f7830b3
Fine-tuned the timing and phase lock optimization
2010-03-31 20:27:15 +00:00
adamdunkels
877eb2fbe9
Fiddled with the timing
2010-03-31 11:54:38 +00:00
adamdunkels
bcfa80102d
Had previously not included the waiting time that the CC2420 introduces when sending a packet. Also increased the smallest packet size, just to be on the safe side.
2010-03-30 23:01:32 +00:00
adamdunkels
226abb8ec3
Removed non-existant include file
2010-03-29 22:10:03 +00:00
adamdunkels
9c58768b59
Extend packet size after creating 802.15.4 header; prepare radio chip with packet before waiting for neighbor phase to make phase wait time deterministic
2010-03-29 21:51:36 +00:00
adamdunkels
b4b7e942b6
Back off a guard time for every non-ack packet
2010-03-29 21:50:01 +00:00
nifi
9508d2c4d7
* Added configurable default number of transmissions for CSMA to use when not specified using packetbuf attributes (CSMA_CONF_MAX_MAC_TRANSMISSIONS).
...
* Renamed packetbuf attribute PACKETBUF_ATTR_MAX_MAC_REXMIT to PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS where value 0 (attribute not set) means that default number of transmissions should be used.
2010-03-26 12:29:29 +00:00
adamdunkels
49009e9cbd
Extend the length of announcement packets if they are too short
2010-03-19 13:24:58 +00:00
adamdunkels
115b3a7c5c
Minor timing bugfix: the time between channel checks should not include the time required for the channel check itself
2010-03-17 18:24:06 +00:00
adamdunkels
efeb9944fa
Increase the required non-activity periods before turning off the radio; remove the strict phase requirement (which messes up things with low-power streaming)
2010-03-17 16:35:52 +00:00
adamdunkels
9be1a65211
Don't set the RELIABLE flag on incoming packets with the ack requested flag set, since it is set on most packets even if they aren't reliable
2010-03-16 18:11:58 +00:00
adamdunkels
b1feac5a00
Bugfixes in low-power streaming mode, and re-added support for announcements. These now use the low-power streaming mode so that active listening for announcments have a radio duty cycle of 16% rather than 100%
2010-03-16 18:11:13 +00:00
adamdunkels
7bab9316da
Two major changes:
...
* Low-power streaming. Experimental support for a low-power mode which
allows rapid exchange of packets with a 16% duty cycle. Does not
seem to function correctly yet though.
* Phase locking. When the phase of a neighbor has been detected, the
sender assumes that the neighbor will keeps it phase and does not
send more strobes than necessary to hit the receiver's channel
check - even if the receiver does not acknowledge the reception of
the strobes when it should have been awake. Instead, the sender
stops strobing and tries again at a later time.
2010-03-14 22:59:23 +00:00
oliverschmidt
def540e6c0
Avoid newlines in macro expansions as cc65 doesn't support them between the macro name and the open parenthesis of the arguments.
...
There were btw other even longer lines with expansions of the same macro already present.
2010-03-14 12:13:54 +00:00
nifi
2cf0fb9cce
Changed to use short address mode with short rime addresses
2010-03-12 14:49:21 +00:00
adamdunkels
4b60301727
Don't set the ack flag for broadcast packets
2010-03-09 20:40:11 +00:00
adamdunkels
17f6b3a324
Simplified the structure of the code
2010-03-09 20:38:55 +00:00
adamdunkels
d0e6436a20
Don't call up the netstack if the transmission was deferred
2010-03-09 20:37:02 +00:00
adamdunkels
edda6dd86c
Minor bugfix: don't subtract collisions and deferrals from the number of transmissions
2010-03-09 13:23:58 +00:00
adamdunkels
2c3d3e3d73
Bugfix: handle deferred transmissions correctly (don't count them)
2010-03-09 13:20:08 +00:00
adamdunkels
79722b4247
Rework of the timing conditions of ContikiMAC: the old timing did not work well on real hardware, the new one seems to work better
2010-03-09 13:19:05 +00:00
nvt-se
96eb20d235
forward arguments even if REXMIT is not set
2010-03-04 14:17:43 +00:00
nifi
5e43a6998b
Replaced old framer (framer_get/framer_set) with new NETSTACK style configuration. Added nullrdc-framer that is a nullrdc with framer support.
2010-03-01 13:30:21 +00:00
nifi
0c084b8c68
added random init of sequence number
2010-03-01 13:17:01 +00:00
adamdunkels
410d860a93
Improved handling of neighbor phase estimation: instead of busy-waiting while waiting for neighbor's phase, the new code schedules a timer just before neighbor wakes up
2010-02-28 20:19:47 +00:00
adamdunkels
e6fceb7200
Added MAC-layer return value to indicate that a packet transmission was deferred
2010-02-28 20:18:30 +00:00
adamdunkels
e06acc4525
Prod the watchdog if waiting for along time
2010-02-28 14:15:16 +00:00
adamdunkels
74da90a06b
Don't count collisions as transmissions
2010-02-28 10:07:17 +00:00
adamdunkels
b6b4941871
Made the number of MAC-layer retransmissions configurable on a per-packet basis, via a packet attribute
2010-02-28 08:35:16 +00:00
adamdunkels
ed88f487c8
Improved detection of link-layer ACKs; increased the time ContikiMAC waits when it has detected a link-layer ACK; increased the number of silence periods required to detect a CCA false positive
2010-02-28 08:33:21 +00:00
nifi
b50d47fb80
added missing function in sicslowmac_driver
2010-02-23 22:45:11 +00:00
nifi
1cfcc8a73a
Removed the combined name of CSMA and NETSTACK_RDC. The name of NETSTACK_RDC can be accessed separately if needed.
2010-02-23 20:42:45 +00:00
nifi
c20047f657
Changed the network stack to use different structures for the different layers (network_driver, mac_driver, rdc_driver, radio_driver). This helps to avoid incorrect configuration.
2010-02-23 20:09:11 +00:00
adamdunkels
bb62749de7
Made debug printfs optional
2010-02-23 18:49:58 +00:00
adamdunkels
0ab2ba433f
Bugfix: the wrong callback pointer was passed to higher layers.
2010-02-23 18:49:45 +00:00
adamdunkels
ed52586e18
Rework of parts of the ContikiMAC code based on input from experimental results. When channel check is triggered because of a false positive, the new version checks the radio several times to make sure that there really is an incoming packet. Otherwise, the radio is switched off. Cleaned up and removed old unused code. Added a few temporary debugging mechanisms and functions.
2010-02-23 18:49:05 +00:00
adamdunkels
0b2b7bcdba
Removed inadvertedly left-over include file
2010-02-18 23:52:34 +00:00
adamdunkels
e34eb54960
A work-in-progress rework of the Contiki MAC and radio layers. The
...
main ideas are:
* Separates the Contiki low-layer network stack into four layers:
network (e.g. sicslowpan / rime), Medium Access Control MAC
(e.g. CSMA), Radio Duty Cycling RDC (e.g. ContikiMAC, X-MAC), and
radio (e.g. cc2420).
* Introduces a new way to configure the network stack. Four #defines
that specify what mechanism/protocol/driver to use at the four
layers: NETSTACK_CONF_NETWORK, NETSTACK_CONF_MAC, NETSTACK_CONF_RDC,
NETSTACK_CONF_RADIO.
* Adds a callback mechanism to inform the MAC and network layers about
the fate of a transmitted packet: if the packet was not possible to
transmit, the cause of the failure is reported, and if the packets
was successfully transmitted, the number of tries before it was
finally transmitted is reported.
* NULL-protocols at both the MAC and RDC layers: nullmac and nullrdc,
which can be used when MAC and RDC functionality is not needed.
* Extends the radio API with three new functions that enable more
efficient radio duty cycling protocols: channel check, pending
packet, and receiving packet.
* New initialization mechanism, which takes advantage of the NETSTACK
#defines.
2010-02-18 21:48:39 +00:00
adamdunkels
f8c804e28b
ntikiMAC: a new radio duty cycling mechanism that uses a combination
...
of link-layer and MAC-layer mechanisms to achieve a very low power
consumption: during idle listening the radio is switched off between
99.2% and 99.6% of the time. One unicast transmission typically adds
between 0.07% and 1.2% additional radio time, depending on packet
size.
ContikiMAC uses the standard IEEE 802.15.4 message format and adds no
additional headers.
ContikiMAC is simple: it uses periodic two-shot channel sampling
during idle listening to keep the radio on-time down. Transmissions
are done with repeated transmissions until a link-layer ACK is
received.
2010-02-18 21:26:15 +00:00
adamdunkels
f5c48751b5
Reworked 802.15.4 header creation and parsing so that it works regardless of the size of the rimeaddr_t typedef
2010-02-18 21:00:28 +00:00
adamdunkels
2fbf21b2b3
Refactored the phase optimization functionality into a separate module
2010-02-18 20:58:59 +00:00
adamdunkels
75e1c0c8c7
Include contiki-conf.h to let the MAC channel check rate be configurable
2010-02-03 16:45:12 +00:00
adamdunkels
06d17c7e1c
Remove unused rtimer code
2010-02-03 16:44:43 +00:00
adamdunkels
e419eb3cc5
Retransmit packet if it didn't receive a MAC layer ack
2010-02-03 01:17:54 +00:00
adamdunkels
d68af249ec
Added a MAC layer return value that informs the caller that a packet did not receive a MAC layer acknowledgement
2010-02-03 01:17:32 +00:00
adamdunkels
181213124b
Added a configuration option for setting the MAC channel check rate (which must be a power of two). The configuration is independent of the MAC protocol.
2010-02-02 23:28:58 +00:00
adamdunkels
fcf60e9260
Removed the csma_init declaration in the mac_driver struct since it isn't needed and it breaks sdcc
2010-02-02 20:45:58 +00:00
adamdunkels
cc2be0f111
Remove compiler warnings
2010-02-02 16:33:07 +00:00
adamdunkels
1a13d25d33
Revised version of the X-MAC implementation that uses a ctimer instead
...
of an rtimer for the periodic radio duty cycling. The benefit of this
implementation is that it leaves an rtimer free for user tasks. The
drawback is a slightly higher idle power consumption. This new version
is based on the current rtimer-based X-MAC.
2010-01-31 18:44:23 +00:00
adamdunkels
e4168db633
Bugfix: deallocate queuebuf only if there was no collision
2010-01-31 13:55:36 +00:00
adamdunkels
2ae7ed827c
Increase the default X-MAC channel check rate to 4 Hz instead of 2 Hz
2010-01-28 13:40:47 +00:00
adamdunkels
8430dab039
Typecast to fix nightly build problem
2010-01-27 07:36:31 +00:00
adamdunkels
4f3e8d565c
Added a simple CSMA (Carrier Sense Multiple Access) mechanism that
...
works on top of an underlying duty cycling mechanism. The CSMA layer
retransmits packets that could not be sent because of a collision was
detected.
2010-01-25 11:46:44 +00:00
adamdunkels
7ad93e5d18
Added a field to the struct mac interface:
...
channel_check_interval(). This function returns the interval by which
the duty cycling mechanism checks the radio channel for activity. It
is used by higher layer mechanisms to determine suitable timeouts for
retransmissions.
2010-01-25 11:43:32 +00:00
adamdunkels
743e93e650
Do not remove encounters - there is no need to, as they are only an optimization
2010-01-14 20:14:03 +00:00
adamdunkels
2f105e933a
Variable xmac_is_on was used both in interrupt and non-interrupt contexts and needs to be volatile
2009-12-06 23:29:38 +00:00
adamdunkels
53457eb1f0
Fixed compilation warning
2009-12-06 17:10:54 +00:00
