Description: The calculated and truncated utilization for this physical upstream channel, accurate as of the most recent docsIfCmtsChannelUtilizationInterval.

The upstream channel utilization is expressed as a percentage of minislots utilized on the physical channel, regardless of burst type.

The utilization calculation can be expressed by the following equation:

Utilization = MinislotsUtilized/MinislotsAllocated * 100%

For an Initial Maintenance region, the minislots for the complete region are considered utilized if the CMTS received an upstream burst within the region from any CM on the physical channel. For contention REQ and REQ/DATA regions, the minislots for a transmission opportunity within the region are considered utilized if the CMTS received an upstream burst within the opportunity from any CM on the physical channel. For all other regions, utilized minislots are those in which the CMTS granted bandwidth to any unicast SID on the physical channel.

For an upstream interface that has multiple logical upstream channels enabled, the utilization index is a weighted sum of utilization indices for the logical channels. The weight for each utilization index is the percentage of upstream mini-slots allocated for the corresponding logical channel.

Example: If 75% of bandwidth is allocated to the first logical channel and 25% to the second, and the utilization for each are 60 and 40, respectively, the utilization for the upstream physical channel is (60 * 0.75) + (40 * 0.25) = 55. This figure applies to the most recent utilization interval.