Management
The “r” is used in this command to repeat the RF link test repeatedly until the user terminates the test by hitting SPACE ENTER.
Example:
#> su testrflink 88 r
Press [space] then [enter] to stop |
| |||
[len] 1512 |
|
|
| |
[suid] 88 | [AP Tx] 20 | [AP Rx] 20 [SU Rx] 20 | ||
[ | 0] | |||
[ | 1] | [AP Tx] 20 | [AP Rx] 20 [SU Rx] 20 | |
[ | 2] | [AP Tx] 20 | [AP Rx] 20 [SU Rx] 20 | |
[ | 3] | [AP Tx] 20 | [AP Rx] 20 | [SU Rx] 20 |
[ | 4] | [AP Tx] 20 | [AP Rx] 20 | [SU Rx] 20 |
[ | 5] | [AP Tx] 20 | [AP Rx] 20 | [SU Rx] 20 |
Success.
As another example, a result of 20..10..18 would indicate 20 packets sent from the AP, 18 packets received at the SU, and 10 packets received back at the AP. You might expect this type of results from Fresnel zone infringements, interference, or
ARQ with Selected Repeat and Multirate Feature
The M900S features ARQ or “Automatic Request for
Both the AP and SU units implement a form of ARQ known as “ARQ with Selected Repeat.”
The units makes a first attempt at transmitting a data frame using the 3.250 Mbps rate. Then, if a
•A minimum of 100ms is placed between
•The units buffer up to 600 frames, or 4 seconds worth, of RF TX Data frames to support the ARQ algorithm.
•The AP unit maintains counters concerning the ARQ algorithm on a per SU basis. The counters include the following data:
Total Transmitted Frames Total Retransmission Attempts Total “Maximum Attempts Reached”
The SU unit maintains counters concerning its use of the ARQ algorithm. The counters include the same data as in the AP.
Trango Broadband Wireless — User Manual M900S Rev C | Page 38 |
