PXF4336V11 INFINEON [Infineon Technologies AG], PXF4336V11 Datasheet - Page 85
![no-image](/images/no-image-200.jpg)
PXF4336V11
Manufacturer Part Number
PXF4336V11
Description
ABM Premium ATM Buf fer Manager
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PXF4336V11.pdf
(425 pages)
- Current page: 85 of 425
- Download datasheet (6Mb)
Figure 3-25 Scheduler Behavior Example
The three columns in
the scheduler load as seen from Connection Acceptance Control (CAC). New connec-
tions are accepted as long as their guaranteed rates fit the spare bandwidth of the
scheduler. The center column shows the case in which all Queues 2..10 are filled; that
is, all non-real-time connections are sending data. The total non-real-time bandwidth, in-
cluding the spare bandwidth, is then distributed to the 9 queues according to their weight.
In this case, two weight factors are defined. Queue 6 has weight of 1, others have weight
of 10. The right column shows the case of only three queues (6, 7 and 9) filled; all other
connections are not sending data at this time. Again, the available bandwidth is fairly dis-
tributed among the queues, still conserving the 1:10 ratio defined by their weights.
Notice that bandwidth of the real-time connections is not affected by bandwidth re-ad-
justments; but, remains constant over time under the assumption that real-time
connections are constantly sending data. If, however, a real-time connection should not
use its bandwidth, the bandwidth would be used immediately by the non-real-time con-
nections. The behavior of the WFQ scheduler shown in
connections has advantages for both the network operator and for the end user:
• The available bandwidth is always used completely, resulting in optimum usage of
• A user paying for a higher guaranteed rate also obtains higher throughput under all
Data Sheet
transmission resources.
load conditions.
Band width n ot reserved
connection setup
with guaranteed
10
6
5
4
3
2
cell rates
9
8
7
1
Figure 3-25
not reserved
distributed
bandwidth
1 0
6
1
9
8
7
describe different conditions: The left column shows
85
distributed
bandwidth
unused
9
7
6
1
Figure 3-25
real-time
Functional Description
traffic
scheduler
output rate
PXF 4336 V1.1
for non-real-time
2001-12-17
ABM-P
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