package/madwifi/Config.in

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