Chapter 1: Configuration
Configuring quality of service
Page
1-236
Configuring quality of service
Maximum Information Rate (MIR) Parameters
Point-to-multipoint links use the following MIR parameters for bandwidth management:
•
Sustained Uplink Data Rate (kbps)
•
Uplink Burst Allocation (kb)
•
Sustained Downlink Data Rate (kbps)
•
Downlink Burst Allocation (kb)
•
Max Burst Downlink Data Rate (kbps)
•
Max Burst Uplink Data Rate (kbps)
Set each of these parameters per AP or per SM independently.
Note
You can refer below whitepaper for 450 Platform Family Max Burst MIR:
http://www.cambiumnetworks.com/resources/pmp-450-maxburst/
Token Bucket Algorithm
The software uses a
token bucket
algorithm that has the following features:
•
Stores credits (tokens) for the SM to spend on bandwidth for reception or transmission.
•
Drains tokens during reception or transmission.
•
Refills with tokens at the sustained rate set by the network operator.
For each token, the SM can send toward the network in the uplink (or the AP can send toward the SM in
the downlink) an equivalent number of kilobits. Two buckets determine the permitted throughput: one
in the SM for uplink and one in the AP for downlink.
The applicable set of Uplink Burst Allocation and Downlink Burst Allocation parameters determine
the
number
of tokens that can fill each bucket. When the SM transmits (or the AP transmits) a packet,
the equivalent number of tokens is removed from the uplink (or downlink) bucket.
Except when full, the bucket is continuously being refilled with tokens at
rates
that the applicable set of
Sustained Uplink Data Rate and Sustained Downlink Data Rate parameters specify. The bucket often
drains at a rate that is much faster than the sustained data rate but can refill at only the sustained data
rate. Thus, the effects of the allocation and rate parameters on packet delay are as follows:
•
The burst allocation affects how many kilobits are processed before packet delay is imposed.
•
The sustained data rate affects the packet delay that is imposed.
Summary of Contents for PMP 450 AP
Page 51: ...Chapter 1 Configuration Quick link setup Page 1 23 ...
Page 155: ...Chapter 1 Configuration Configuring security Page 1 127 ...
Page 163: ...Chapter 1 Configuration Configuring security Page 1 135 ...
Page 164: ...Chapter 1 Configuration Configuring security Page 1 136 ...
Page 193: ...Chapter 1 Configuration Configuring radio parameters Page 1 165 ...
Page 194: ...Chapter 1 Configuration Configuring radio parameters Page 1 166 ...
Page 195: ...Chapter 1 Configuration Configuring radio parameters Page 1 167 ...
Page 206: ...Chapter 1 Configuration Configuring radio parameters Page 1 178 ...
Page 210: ...Chapter 1 Configuration Configuring radio parameters Page 1 182 ...
Page 636: ...Chapter 5 Troubleshooting Logs Page 5 16 Figure 95 SM Authorization log ...