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- # MadWifi configuration
- config MADWIFI_DEBUG
- bool "Enable compilation of debugging features"
- depends on EXPERIMENTAL && PACKAGE_kmod-madwifi
- default n
- choice
- prompt "Rate control algorithm selection"
- depends on PACKAGE_kmod-madwifi
- default MADWIFI_RCA_MINSTREL
- help
- This option controls how MadWifi chooses its bitrate.
- config MADWIFI_RCA_MINSTREL
- bool "Use the Minstrel rate control algorithm"
- help
- This code is takes a wandering minstrel approach. Wander around the
- different rates, singing wherever you can. And then, look at the
- performance, and make a choice. Note that the wandering minstrel will
- always wander in directions where he/she feels he/she will get paid
- the best for his/her work.
- config MADWIFI_RCA_ONOE
- bool "Use the Onoe rate control algorithm"
- help
- Onoe is a credit based RCA where the value of the credit is determined
- by the frequency of successful, erroneous and retransmissions
- accumulated during a fixed invocation period of 1000 ms. If less than
- 10% of the packets need to be retransmitted at a particular rate, Onoe
- keeps increasing its credit point till the threshold value of 10 is
- reached. At this point, the current transmission rate is increased to
- the next available higher rate and the process repeated with credit
- score of zero. Similar logic holds for deducting the credit score and
- moving to a lower bit-rate for failed packet
- transmission/retransmission attempts. However, once a bit-rate has
- been marked as failure in the previous attempt, Onoe will not attempt
- to select that bit-rate until 10 seconds have elapsed since the last
- attempt. Due to the manner in which it operates, Onoe is conservative
- in rate selection and is less sensitive to individual packet failure.
- config MADWIFI_RCA_AMRR
- bool "Use the AMRR rate control algorithm"
- help
- AMRR uses Binary Exponential Backoff (BEB) technique to adapt the
- length (threshold) of the sampling period used to change the values of
- bit-rate and transmission count parameters. It uses probe packets and
- depending on their transmission status adaptively changes the threshold
- value. The adaptation mechanism ensures fewer failed
- transmission/retransmission and higher throughput by not switching to a
- higher rate as specified by the backoff mechanism. In addition to this,
- the AMRR employs heuristics to capture the short-term variations of the
- channel by judiciously setting the rate and transmission count
- parameters.
- config MADWIFI_RCA_SAMPLERATE
- bool "Use the SampleRate rate control algorithm"
- help
- SampleRate decides on the transmission bit-rate based on the past
- history of performance; it keeps a record of the number of successive
- failures, the number of successful transmits and the total transmission
- time along with the destination for that bit-rate. Stale samples are
- removed based on a EWMA windowing mechanism. If in the sampling
- process, no successful acknowledgment is received or the number of
- packets sent is multiple of 10 on a specific link, it transmits the
- packet with the highest rate which has not failed 4 successive times.
- Other than that it transmits packets at the rate which has the lowest
- average transmission time.
- endchoice
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