package/madwifi/Config.in

   1 # MadWifi configuration
   2
   3 config MADWIFI_DEBUG
   4         bool "Enable compilation of debugging features"
   5         depends on EXPERIMENTAL && PACKAGE_kmod-madwifi
   6         default n
   7
   8 choice
   9         prompt "Rate control algorithm selection"
  10         depends on PACKAGE_kmod-madwifi
  11         default MADWIFI_RCA_MINSTREL
  12         help
  13           This option controls how MadWifi chooses its bitrate.
  14
  15 config MADWIFI_RCA_MINSTREL
  16         bool "Use the Minstrel rate control algorithm"
  17         help
  18           This code is takes a wandering minstrel approach. Wander around the
  19           different rates, singing wherever you can. And then, look at the
  20           performance, and make a choice. Note that the wandering minstrel will
  21           always wander in directions where he/she feels he/she will get paid
  22           the best for his/her work.
  23
  24 config MADWIFI_RCA_ONOE
  25         bool "Use the Onoe rate control algorithm"
  26         help
  27           Onoe is a credit based RCA where the value of the credit is determined
  28           by the frequency of successful, erroneous and retransmissions
  29           accumulated during a fixed invocation period of 1000 ms. If less than
  30           10% of the packets need to be retransmitted at a particular rate, Onoe
  31           keeps increasing its credit point till the threshold value of 10 is
  32           reached. At this point, the current transmission rate is increased to
  33           the next available higher rate and the process repeated with credit
  34           score of zero. Similar logic holds for deducting the credit score and
  35           moving to a lower bit-rate for failed packet
  36           transmission/retransmission attempts. However, once a bit-rate has
  37           been marked as failure in the previous attempt, Onoe will not attempt
  38           to select that bit-rate until 10 seconds have elapsed since the last
  39           attempt. Due to the manner in which it operates, Onoe is conservative
  40           in rate selection and is less sensitive to individual packet failure.
  41
  42 config MADWIFI_RCA_AMRR
  43         bool "Use the AMRR rate control algorithm"
  44         help
  45           AMRR uses Binary Exponential Backoff (BEB) technique to adapt the
  46           length (threshold) of the sampling period used to change the values of
  47           bit-rate and transmission count parameters. It uses probe packets and
  48           depending on their transmission status adaptively changes the threshold
  49           value. The adaptation mechanism ensures fewer failed
  50           transmission/retransmission and higher throughput by not switching to a
  51           higher rate as specified by the backoff mechanism. In addition to this,
  52           the AMRR employs heuristics to capture the short-term variations of the
  53           channel by judiciously setting the rate and transmission count
  54           parameters.
  55
  56 config MADWIFI_RCA_SAMPLERATE
  57         bool "Use the SampleRate rate control algorithm"
  58         help
  59           SampleRate decides on the transmission bit-rate based on the past
  60           history of performance; it keeps a record of the number of successive
  61           failures, the number of successful transmits and the total transmission
  62           time along with the destination for that bit-rate. Stale samples are
  63           removed based on a EWMA windowing mechanism. If in the sampling
  64           process, no successful acknowledgment is received or the number of
  65           packets sent is multiple of 10 on a specific link, it transmits the
  66           packet with the highest rate which has not failed 4 successive times.
  67           Other than that it transmits packets at the rate which has the lowest
  68           average transmission time.
  69
  70 endchoice