128 |
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| Field |
| Description |
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| AIFS |
| The Arbitration |
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| milliseconds) for data frames. |
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| Valid values for AIFS are 1 through 255. |
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| For more information, see “EDCA Control of Data Frames and |
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| cwMin |
| This parameter is input to the algorithm that determines the initial |
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| (Minimum Contention |
| random backoff wait time ("window") for retry of a transmission. |
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| Window) |
| The value specified here in the Minimum Contention Window is the |
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| upper limit (in milliseconds) of a range from which the initial random |
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| backoff wait time is determined. |
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| The first random number generated will be a number between 0 and |
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| the number specified here. |
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| If the first random backoff wait time expires before the data frame is |
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| sent, a retry counter is incremented and the random backoff value |
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| (window) is doubled. Doubling will continue until the size of the |
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| random backoff value reaches the number defined in the Maximum |
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| Contention Window. |
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| Valid values for the "cwmin" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or |
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| 1023. |
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| For more information, see “Random Backoff and Minimum / Maximum |
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| cwMax |
| The value specified here in the Maximum Contention Window is the |
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| upper limit (in milliseconds) for the doubling of the random backoff |
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| (Maximum Contention |
| value. This doubling continues until either the data frame is sent or the |
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| Window) |
| Maximum Contention Window size is reached. |
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| Once the Maximum Contention Window size is reached, retries will |
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| continue until a maximum number of retries allowed is reached. |
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| Valid values for the "cwmax" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or |
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| 1023. |
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| For more information, see “Random Backoff and Minimum / Maximum |
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