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
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
cc2be0f111
Remove compiler warnings
2010-02-02 16:33:07 +00:00
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
e4168db633
Bugfix: deallocate queuebuf only if there was no collision
2010-01-31 13:55:36 +00:00
2ae7ed827c
Increase the default X-MAC channel check rate to 4 Hz instead of 2 Hz
2010-01-28 13:40:47 +00:00
8430dab039
Typecast to fix nightly build problem
2010-01-27 07:36:31 +00:00
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
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
743e93e650
Do not remove encounters - there is no need to, as they are only an optimization
2010-01-14 20:14:03 +00:00
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
53457eb1f0
Fixed compilation warning
2009-12-06 17:10:54 +00:00
8bcc838d8a
Bugfix: don't set the 'we are sending' flag until we are actually sending
2009-12-06 17:05:45 +00:00
6897270289
Bugfix to the Contiki LPP encounter timing code: encounters are now
...
properly timed.
2009-12-06 13:18:32 +00:00
822149f943
Significant improvements to the Contiki X-MAC:
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* the code is simplified, particularly the duty cycling logic
* old unused code has been removed
* Contiki X-MAC now listens before sending a strobe to avoid MAC-level
collisions
* broadcasts are sent directly, without strobes, reducing the power
consumption of receivers
* turn off radio for 1 ms between sending a strobe and expecting the
strobe ack
2009-12-06 13:16:59 +00:00
cef2e65c9b
Added an error type for signalling a MAC-layer collision
2009-12-05 21:49:51 +00:00
4a1a823a49
Code style fix
2009-12-05 13:29:41 +00:00
a1b4597b95
fixed announcement compilation error
2009-11-27 14:27:50 +00:00
aeefa75304
Fixed alignment problems in announcement packet creation
2009-11-27 12:49:27 +00:00
0034fd7bca
generic return values for sent packet
2009-11-13 10:09:02 +00:00
26bb5ecd21
added radio and MAC generic return values to allow applications finding out whether the packet was transmitted
2009-11-13 08:59:22 +00:00
70fc23ac7e
Enable stream mode by default, remove LED debug mode
2009-11-04 16:02:45 +00:00
5aab2eb77d
A simple addition with significant performance implications:
...
sicslowpan tags TCP packets with the PACKETBUF_ATTR_PACKET_TYPE_STREAM
flag, which makes the underlying power-saving MAC layer keep the radio
on for some time after transmitting the packet. This allows reply
packets to be processed directly, significantly increasing TCP latency
and throughput.
2009-11-02 11:58:56 +00:00
223fa1c8e5
added missing include
2009-10-20 07:42:03 +00:00
7cdfbca973
Alignment problems with announcements fixed
2009-10-19 21:27:02 +00:00
9ec57d61ad
Added MAC layer framing support to X-MAC so that packets now are standard 802.15.4 frames
2009-10-19 20:53:56 +00:00
4de1816e36
Added a new module called "framer" that creates MAC level frames to
...
the packetbuf from packet attributes. Two framer modules are included,
one that creates 802.15.4 frame headers, and one that creates a
minimal "nullmac"-style header that only contains the link-local
addresses.
2009-10-19 18:30:03 +00:00
ae226c5917
* Set sender and receiver packet attributes on incoming packets
...
* Added link layer destination check
2009-10-19 11:25:54 +00:00
10c873018d
Ensure that DEFAULT_PERIOD is != 0, to avoid a modulo with 0
2009-10-19 06:39:29 +00:00
9d26bd663e
A new optimization to X-MAC: senders now keep track of when neighbors
...
last were known to be awake. When sending a packet, a sender does not
start to send strobes until the neighbor is expected to be awake. This
reduces power consumption for senders and decreases the contention in
the network as there are less packets in the air. Additionally, the
ACK optimization was improved so that data/ack exchanges now are
more efficient.
2009-10-18 13:19:25 +00:00
0ad51b8dcc
Moved the link layer destination check to sicslowmac
2009-09-18 16:37:17 +00:00
2181e90f69
Added the possibility to switch lpp off. Fixed sdcc compiler issue
2009-09-09 21:09:23 +00:00
1cafbc6002
sdcc compiler issue fix: compound assignments are not supported, so we use memcpy() instead
2009-09-09 21:08:46 +00:00
4d21a3e203
Don't assume that radio->send turns on the radio automatically.
2009-09-04 10:59:30 +00:00
522f991f14
Set sender and receiver packet attributes on incoming packets: patch by Gidon Ernst
2009-08-20 18:59:17 +00:00
912aba7280
added init function in MAC driver for easier configuration
2009-06-22 11:14:11 +00:00
f39d2bd4c6
Fixed link panid for broadcasts to be standard compliant. Ignore packets addressed to other non-broadcast panids.
2009-05-26 12:08:29 +00:00
fe5a1f1068
Added an optimization option that avoids multiple simultaneous broadcasts from neighbors: when a broadcast is to be sent, a sender does not send until it knows that no other nodes are broadcasting.
2009-05-10 21:09:05 +00:00
0adceb63b4
Code cleanup; made encounter optimization explicit; added optimization for adaptive off-time, but it currently seems to work bad with broadcasts
2009-05-06 15:06:38 +00:00
9fff85757d
Code cleanup; made strobe transmission time longer again (seems to work better in cooja?)
2009-05-06 15:05:28 +00:00
cc44e89415
Reduced default strobe time, which seems to work well. Avoid running the interrupt if the power-save feature is turned off (fixes problems with serial data reception on a gateway mote)
2009-04-29 11:42:13 +00:00
81ef83b856
Added option to wait randomly before sending a packet. A few code cleanups. Avoid switching radio off when sending a packet with end-to-end acks, because an ACK may arrive shortly after the transmission.
2009-04-28 14:00:53 +00:00
84b38de494
removed bitfields for compatibility with cc65
2009-04-09 21:54:09 +00:00
03cd533712
made LISTEN_TIME and OFF_TIME configurable.
2009-04-07 11:29:08 +00:00
5e456aea7d
Added optimization for sending ACKs immediately. Turned optimizations on. Increased listening time to 1/64 s again due to problems with broadcasts with the 1/128 s setting
2009-04-06 22:50:35 +00:00
9f2ff48fda
added 802.15.4 frame packeter
2009-04-06 13:19:03 +00:00
ed1e945e66
Added guard code so that OFF_TIME is never zero
2009-04-03 20:08:05 +00:00
8dbd2b2337
Significant power consumption optimization: LPP now keeps track of encounters with neighbors and uses this information to keep the radio switched off longer.
2009-04-03 19:59:22 +00:00
1d86b01bfb
Made optimizations explicit (and configurable). Added missing initialization of dutycycle protothread. Reduced default listen time and off time.
2009-04-03 11:45:06 +00:00
04101aae36
Fixed alignment problem on the MSP430, where the LPP header may be misaligned
2009-03-31 17:39:54 +00:00
adamdunkels
fros4943
nifi
nvt-se