Professional Access Point Administrator Guide
Field
Description
cwMin | This parameter is input to the algorithm that determines the initial random |
(Minimum Contention Window) | backoff wait time (window) for retry of a transmission. |
| The value specified here in the Minimum Contention Window is the upper limit |
| (in milliseconds) of a range from which the initial random backoff wait time is |
| determined. |
| The first random number generated will be a number between 0 and the |
| number specified here. |
| If the first random backoff wait time expires before the data frame is sent, a |
| retry counter is incremented and the random backoff value (window) is dou- |
| bled. Doubling will continue until the size of the random backoff value reaches |
| the number defined in the Maximum Contention Window. |
| For more information, see “Random Backoff and Minimum / Maximum Conten- |
| tion Windows” on page 146. |
|
|
cwMax | The value specified here in the Maximum Contention Window is the upper limit |
(Maximum Contention Window) | (in milliseconds) for the doubling of the random backoff value. This doubling |
| continues until either the data frame is sent or the Maximum Contention Win- |
| dow size is reached. |
| Once the Maximum Contention Window size is reached, retries will continue |
| until a maximum number of retries allowed is reached. |
| For more information, see “Random Backoff and Minimum / Maximum Conten- |
| tion Windows” on page 146. |
|
|
TXOP Limit | Station EDCA Parameter Only (The TXOP Limit applies only to traffic flowing |
(Transmission Opportunity Limit) | from the client station to the access point.) |
| The Transmission Opportunity (TXOP) is an interval of time when a WME |
| client station has the right to initiate transmissions onto the wireless medium |
| (WM). |
| This value specifies (in milliseconds) the Transmission Opportunity (TXOP) for |
| client stations; that is, the interval of time when a WMM client station has the |
| right to initiate transmissions on the wireless network. |
|
|
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