RS8234 Mindspeed Technologies, RS8234 Datasheet - Page 172

• Manufacturer Part Number: RS8234
• Description: Atm Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

6.0 Traffic Management
6.2 xBR Cell Scheduler Functional Description
Figure 6-7. Assigning CBR Cell Slots
6-12
A
A
A
A
A
A
A
A
A
A
00
10
20
30
40
50
60
70
80
90
C
01
11
21
31
41
51
61
71
81
91
02
12
22
32
42
52
62
72
82
92
Assigning CBR Cell Slots
Figure 6-7
CBR channels, each with a different rate. In this example, TBL_SIZE = 100 and
SLOT_PER = 93. VCC_INDEX A occupies every tenth schedule slot and
therefore it will transmit at R/10, or 35.4 K cells/second. VCC_INDEX B
occupies a slot every 25 cell slots and will transmit at a rate of R/25, or
14.2 K cells/second. VCC_INDEX C occupies only one schedule slot
and therefore will transmit at the minimum rate, R/TBL_SIZE, or
3.54 K cells/second. Not all cell slots have been assigned to CBR channels.
During these slots, the RS8234 will dynamically schedule traffic from the other
service classes. However, the total bandwidth of channels A, B, and C will be
reserved.
03
13
23
33
43
53
63
73
83
93
SCHEDULE TABLE
Mindspeed Technologies
B
B
displays an example Schedule Table with slots assigned to various
04
14
24
34
44
54
64
74
84
94
05
15
25
35
45
55
65
75
85
95
06
16
26
36
46
56
66
76
86
96
07
17
27
37
47
57
67
77
87
97
ATM ServiceSAR Plus with xBR Traffic Management
08
18
28
38
48
58
68
78
88
98
B
B
™
09
19
29
39
49
59
69
79
89
99
SCHEDULE SLOT
B
29
VCC_INDEX = B
28234-DSH-001-B
RS8234
100074_046