Alvarion BreezeACCESS II, Системное руководство

Страница: 147 / 324

Menus and Parameters
2-17
BreezeACCESS Version 4.5 System Manual
Wireless Link Counters
The unit transmits data frames received from the Ethernet port, as well
as self-generated control and wireless management frames, to the
wireless media. After transmission of a unicast frame, the unit waits for
an acknowledgement (ACK) message from the receiving unit. Some
control and wireless management frames as well as broadcast and
multicast frames that are sent to more than one unit are not
acknowledged. If an ACK is not received after a predefined time
(determined by the
Acknowledge Delay Limit parameter, see
page 2-63 ), the unit will retransmit the frame until it receives an ACK. If
an ACK is not received before the number of retransmissions has
reached a maximum predefined number (
Number of Retransmissions
parameter, see page 2-85), it stops retransmitting and drops the frames.
!
Total transmitted frames to wireless – Displays the number of
frames transmitted to the wireless media. The total includes one
count for each data or RTP frame (internally generated voice frame)
that was transmitted successfully (excluding retransmissions) as
well as the number of transmitted control and wireless management
frames.
If the ACSE Option ( see page 2-66 ) is enabled, then in addition to
the total count, there are also separate counters for the total
number of data frames, voice (RTP) frames and beacon frames. The
voice frames include fax frames. This is true also for Subscriber
Units that do not support voice in cells where the
ACSE Option
parameter in the AU is enabled. In this case the Voice count should
be 0.
!
Total transmitted unicast frames to wireless - Displays the
number of unicast frames successfully transmitted to the wireless
media, excluding retransmissions. This count is useful for
calculating the rates of retransmissions or dropped frame, since
only unicast frames are retransmitted if not acknowledged.
!
Total submitted frames (bridge) – Displays the total number of
data and RTP frames submitted to the bridge for transmission to the
wireless media. The count does not include control frames, wireless
management frames, and retransmissions.
In addition to the total count, there are also separate counts for
frames according to the priority queue to which they were routed
(
Low , Mid , or High ).
If the ACSE Option is enabled, then the Low , Mid and High counts
are for data frames only and there is an additional counter for voice
(RTP) frames. The voice frames count includes fax frames. This is
true also for Subscriber Units that do not support voice in cells
where the
ACSE Option in the AU is enabled. In this case the Voice
count should be 0.
!
Frames dropped (too many retries) – Displays the number of
dropped frames. The frames that were retransmitted to the extent of
the maximum allowed number of retransmissions without being
acknowledged.