| 8 Configuring Advanced Settings |
Table 55. QoS Settings |
|
|
|
Field | Description |
cwMin | This parameter is input to the algorithm that determines the initial |
(Minimum Contention | random backoff wait time ("window") for retry of a transmission. |
Window) | The value specified 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 doubled. Doubling will continue until the size of the |
| random backoff value reaches the number defined in the Maximum |
| Contention Window. |
|
|
cwMax | The value specified in the Maximum Contention Window is the upper |
(Maximum Contention | limit (in milliseconds) for the doubling of the random backoff value. |
Window) | This doubling continues until either the data frame is sent or the |
| Maximum Contention Window size is reached. |
| Once the Maximum Contention Window size is reached, retries will |
| continue until a maximum number of retries allowed is reached. |
|
|
TXOP Limit | Station EDCA Parameter Only (The TXOP Limit applies only to |
| traffic flowing 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. |
|
|
Configuring QoS 159
