ISUP ACC (0x00A8)

Purpose

This section includes PPL Config Bytes and Timer information for the PPL Component ISUP ACC (Automatic Congestion Control).

ISUP ACC Configuration Bytes

Byte

Description

Value

0x01

Enable/Disable ACC Remote Algorithm

0x00=Disable

0x01=Enable (default)

0x02

Remote Node ACC or non-ACC

0x00=non-ACC node

0x01=ACC node (default)

0x03

Enable/Disable Network/Link Congestion Control

0x00=Disable

0x01=Enable (default)

0x14

Throttle Timer Ticks in Seconds

0x01=one second

0x1E

Average Timer Ticks in Seconds

0x04=four seconds

0x1F

Alpha Value of Average Timer normalized to 128

64 dec (.5)

0x40

0x20

Beta Value of Average Timer normalized to 128

64 dec (.5)

0x40

0x21

X Value of Average Timer normalized to 128

102 dec (.2)

0x66

0x22

Y Value of Average Timer normalized to 128

25 (.8)

0x19

0x23

Threshold (Leaky Bucket Size) of Remote Node for Congestion Level 1

10 decimal

0x0A

0x24

Threshold (Leaky Bucket Size) of Remote Node for Congestion Level 2

5 decimal

0x05

0x25

Increment Factor for Remote Node

10 decimal

0x0A

0x28

Network Congestion Control (NCC) Multiplicative Decrement Constant Beta_0 normalized to 128

128 decimal

0x80

0x29

NCC Multiplicative Decrement Constant Beta_1 normalized to 128

122 decimal

0x7A

0x2A

NCC Multiplicative Decrement Constant Beta_2 normalized to 128

110 decimal

0x6E

0x2B

NCC Multiplicative Decrement Constant Beta_3 normalized to 128

90 decimal

0x5A

0x2C

NCC Multiplicative Decrement Constant Beta_4 normalized to 128

40 decimal

0x28

0x2D

NCC Additive Increase Constant Alpha

8 decimal

0x08

0x32

NCC Handling of TFC

0x00=Multi levels with priorities(ANSI, CHINA, JT)

0x01= Single Level without priorities(ITU)

0x02=Multi levels without priorities(BT)

PPL Timers

Timer ID

Timer

Default Value

0x01

Short Timer (T_short)-T29

60 (600 ms)

0x3C

0x02

Long Timer (T_long) - T30

1200
(12 seconds)

0x4B0

0x03

Tick Timer (T_tick) which drives Throttle Timer and Average Timer

100
(1 second)

0x64

0x04

NCC Timer (T15+T16)

500
(5 seconds)

0x1F4