Operational Procedures for BTS
56
Figure 47:
An example of Link Capacity Test using MIR settings DL 50/UL 20
Testing CIR - No reboot required
Committed information rate (CIR) is a functionality that supports the data traffic for managing different
services with committed rates for different customers (using phones as well).
Similar to Canopy (PMP450), cnWave™ 5G Fixed has four priority levels. These four priority levels are
mapped using the priority bits. Packet classification is done on the p-bits field of the VLAN header.
Figure 48:
802.1Q Ethernet frame
The CnWave™ 5G Fixed scheduler uses a round-robin scheme at each priority level. Everything is
scheduled at each level until the queues at that level are empty.
In addition to MIR, Cambium Networks provides a CIR per priority level. The CIR priority levels support in
delivering up to an allotted amount of data, provided capacity exists, while considering the priority
constraints. CIR protects and guarantees the allocated data rates even under overload.
The four priority levels start at the highest level and work down to the lowest level. This implies that a
high-priority level traffic is scheduled ahead of any low-priority level traffic (which is pending). Following
are the four priority levels, which are listed in the priority order from highest to lowest:
l
Ultra High Priority (802.1p bits 6 and 7)
l
High Priority (802.1p bits 5 and 6)
