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File: [CENS] / tos-contrib / s-mac / README (download)
Revision: 1.2, Thu Jan 8 19:48:35 2004 UTC (5 years, 10 months ago) by weiye
Branch: MAIN
CVS Tags: smac-1-2, scale_radio_channel, rdd_alpha_version_1, pregeonet, nims-lab-Sep07-2004, nims-jr-Sep05-04, lessgps_release, kiss_release, bp_scale_radio_channel, acoustic-05-18-06, PRE_TOSNIC_FIX, PRE_NOMEGA_MOTENIC, PRE_MOTENIC_CLEANUP, PRE_CEILING_FIX, PRE_64BIT, MOTENIC_PRE_BUGFIX_20050415, LESSGPS_1_00, LAURA_CALIBRATION_EXPERIMENTS, KISS_1_0, HOSTMOTE_V_6_EXPERIMENTAL, HOSTMOTE_PROTOCOL_VERSION_7, HOSTMOTE_PROTOCOL_VERSION_6_WITH_HOSTMOAP, HOSTMOTE_PROTOCOL_VERSION_5_WITH_HOSTMOAP, HOSTMOTE_PROTOCOL_VERSION_5, HOSTMOTE_PROTOCOL_VERSION_4, HOSTMOTE_PROTOCOL_VERSION_3, HEAD, ESS_RELEASE_3_5, ESS_RELEASE_3_4, ESS_RELEASE_3_3, ESS_RELEASE_3_2, ESS_RELEASE_3_1, ESS_RELEASE_3_0, ESS_RELEASE_2_0, ESS_CONNECTIVITY, ESS_CENTROUTE_TESTING, ESS2-CMS-V1_5_pretest, ESS2-CMS-V1_4cMergeSympathy_2, ESS2-CMS-V1_4c, ESS2-CMS-V1_4b, ESS2-CMS-V1_4a, ESS2-CMS-V1_3, ESS2-CMS-V1_2, ESS2-CMS-V1_1, ESS2-CMS-V1_0, EMSTAR_RELEASE_2_5, EMSTAR_RELEASE_2_1_BRANCH, EMSTAR_RELEASE_2_1, EMSTAR_RELEASE_2_0, EMSTAR_PRE_HTML, CYCLOPS_RELEASE_CANDIDATE_2_0, CYCLOPS_PRERELEASE_STABLE, CENTROUTE_EMSTAR_SOCKETS, BG_1_0, BANGLADESH_ARSENIC_1_2, BANGLADESH_ARSENIC_1_1, AMARSS_JR_DEPLOYMENT_6_05_07
Changes since 1.1: +5 -1 lines

Fixed a broken link to S-MAC web page.

S-MAC Implementation in TinyOS

Contact: Wei Ye (weiye@isi.edu)

S-MAC is an energy-efficient Medium Access Control (MAC) protocol for wireless
sensor networks designed by USC/ISI and UCLA. S-MAC implementation in TinyOS 
is not based on the standard radio communication stack by UC Berkeley. Instead, 
we implemented a new physical layer (PHY) that handles low-level packet 
transmission and reception and provides important support to S-MAC. Our S-MAC 
and PHY forms a new communication stack in TinyOS.

Following is a highlight of some features of S-MAC stack.

 * Flexible architecture that allows people to easily build different 
   components at different layers. The nested header structure allows each
   component to freely define its own packet formats and add its header fields
   in packets from upper layers.

 * Clean separation of MAC and PHY allows different MACs can be built on the
   same PHY. The PHY can reliably and efficiently handle variable length 
   packets up to 250 bytes, and is robust to back-to-back packet transmission.

 * S-MAC provides energy-efficient operations on radio

   * Low-duty-cycle operation on radio trades off latency for energy savings.
   * Overhearing avoidance -- sleep when neighbors are talking

 * Abundant features in unicast provided by S-MAC (similar to IEEE 802.11).

   * RTS/CTS/Data/ACK mechanism is Robust to collisions, hidden terminal 
     problem, and data packet losses.
   * Fragmentation support for long messages
   
For details of S-MAC protocol design, please refer to the following paper

  Wei Ye, John Heidemann and Deborah Estrin, "Medium Access Control with 
  Coordinated, Adaptive Sleeping for Wireless Sensor Networks," To appear in 
  the IEEE/ACM Transactions on Networking.
  
  Available at http://www.isi.edu/~weiye/pub/smac_ton.pdf

For details of S-MAC implementation, please refer to the following technical
report

  Wei Ye, John Heidemann and Deborah Estrin, "A Flexible and Reliable Radio 
  Communication Stack on Motes," USC/ISI Technical Report ISI-TR-565.
  
  Available at http://www.isi.edu/~weiye/pub/commstack.pdf

  The main S-MAC source code download page is at
  
  http://www.isi.edu/ilense/software/smac/

New users can look at the following web page to get started with S-MAC
stack. There are also README file in each application directory.

  http://www.isi.edu/ilense/software/smac/get_start_1.1.html

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