docsIf31CmtsUsOfdmaChanUtilization
DOCS-IF31-MIB ·
.1.3.6.1.4.1.4491.2.1.28.1.23.1.22
Object
column
percent Unsigned32
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.
Context
- MIB
- DOCS-IF31-MIB
- OID
.1.3.6.1.4.1.4491.2.1.28.1.23.1.22- Type
- column
- Access
- readonly
- Status
- current
- Units
- percent
- Parent
- docsIf31CmtsUsOfdmaChanEntry
- Table
- docsIf31CmtsUsOfdmaChanTable
- Siblings
- 22
Syntax
percent Unsigned32
Values & Constraints
Object Constraints
range: 0-100
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| docsIf31CmtsUsOfdmaChanTemplateIndex The index of the UsOfdmaModulationTemplate object which the
CMTS/CCAP utilized when configuring this channel. | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.1 |
| docsIf31CmtsUsOfdmaChanPreEqEnable This attribute indicates pre-equalization is enabled on the
OFDMA upstream channel when its value is true, or disabled when
its value is false. | column | SNMPv2-TCTruthValue | .1.3.6.1.4.1.4491.2.1.28.1.23.1.10 |
| docsIf31CmtsUsOfdmaChanFineRngGuardband This attribute is the sum of the upper and lower guard
bands for fine ranging in Hz. | column | Hz SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.11 |
| docsIf31CmtsUsOfdmaChanFineRngNumSubcarriers This attribute is the maximum number of subcarriers for
fine ranging. | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.12 |
| docsIf31CmtsUsOfdmaChanFineRngPreambleLen This attribute is the length of the OFDMA fine ranging IUC
preamble in bits. | column | bits SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.13 |
| docsIf31CmtsUsOfdmaChanInitRngGuardband This attribute is the sum of the upper and lower guard bands
for initial ranging in Hz. | column | Hz SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.14 |
| docsIf31CmtsUsOfdmaChanInitRngNumSubcarriers This attribute is the maximum number of subcarriers for
initial ranging. | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.15 |
| docsIf31CmtsUsOfdmaChanInitRngPreambleLen This attribute is the maximum number of subcarriers for
initial ranging. | column | bits SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.16 |
| docsIf31CmtsUsOfdmaChanProvAttribMask This attribute provides the Provisioned Attribute Mask for
the OFDMA upstream channel. | column | DOCS-IF3-MIBAttributeMask | .1.3.6.1.4.1.4491.2.1.28.1.23.1.17 |
| docsIf31CmtsUsOfdmaChanTxBackoffStart The initial random backoff window to use when retrying
transmissions. Expressed as a power of 2. A value of 16
at the CMTS indicates that a proprietary adaptive retry
mechanism … | column | Integer32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.18 |
| docsIf31CmtsUsOfdmaChanTxBackoffEnd The final random backoff window to use when retrying
transmissions. Expressed as a power of 2. A value of 16
at the CMTS indicates that a proprietary adaptive retry
mechanism is… | column | Integer32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.19 |
| docsIf31CmtsUsOfdmaChanConfigChangeCt This attribute contains the value of the Configuration
Change Count field in the Upstream Channel Descriptor (UCD) MAC
Management Message currently in use on this channel. | column | Unsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.2 |
| docsIf31CmtsUsOfdmaChanRangingBackoffStart The initial random backoff window to use when retrying
Ranging Requests. Expressed as a power of 2. A value of
16 at the CMTS indicates that a proprietary adaptive retry
mechani… | column | Integer32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.20 |
| docsIf31CmtsUsOfdmaChanRangingBackoffEnd The final random backoff window to use when retrying
Ranging Requests. Expressed as a power of 2. A value of
16 at the CMTS indicates that a proprietary adaptive retry
mechanism… | column | Integer32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.21 |
| docsIf31CmtsUsOfdmaChanId This attribute is the upstream Channel Id signaled in the
DOCSIS protocol for the OFDMA upstream channel. The Channel
Id is unique within the associated MacDomain. | column | DOCS-IF3-MIBChId | .1.3.6.1.4.1.4491.2.1.28.1.23.1.23 |
| docsIf31CmtsUsOfdmaChanTargetRxPower The power of the expected commanded received signal in the channel,
referenced to the CCAP input. | column | TenthdBmV DOCS-IF-MIBTenthdBmV | .1.3.6.1.4.1.4491.2.1.28.1.23.1.3 |
| docsIf31CmtsUsOfdmaChanLowerBdryFreq This attribute provides the lower frequency for the OFDMA US
channel. | column | Hz SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.4 |
| docsIf31CmtsUsOfdmaChanUpperBdryFreq This attribute provides the upper frequency for the OFDMA US
channel. | column | Hz SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.5 |
| docsIf31CmtsUsOfdmaChanSubcarrierSpacing This attribute defines the subcarrier spacing associated with
a particular FFT mode configured on the OFDMA upstream channel. | column | kHz SubcarrierSpacingType | .1.3.6.1.4.1.4491.2.1.28.1.23.1.6 |
| docsIf31CmtsUsOfdmaChanCyclicPrefix The cyclic prefix assigned to this channel for mitigating
interference due to microreflections. | column | number of samples UsOfdmaCyclicPrefix | .1.3.6.1.4.1.4491.2.1.28.1.23.1.7 |
| docsIf31CmtsUsOfdmaChanNumSymbolsPerFrame This attribute is the number of symbol periods per frame. | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.23.1.8 |
| docsIf31CmtsUsOfdmaChanRollOffPeriod This attribute is the windowing roll-off period. | column | number of samples UsOfdmaRollOffPeriod | .1.3.6.1.4.1.4491.2.1.28.1.23.1.9 |