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Admission control according to ericsson standards
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Admission control
DL Power :
Three parameters pwrAdm, pwrAdmOffset and beMarginDlPwr
1- pwrAdm
Description :
Admission limit for downlink cell carrier power. Expressed relative to the lower of maximumTransmissionPower (configured in this UtranCell instance) and maxDlPowerCapability (configured in the corresponding instance of RbsLocalCell in the RBS).
Disturbances: Changing this attribute will re-initiate Congestion Control measurements.Takes effect: Re-initiation of DL TX carrier power measurements Dependencies: pwrAdm + pwrOffset <= 100 %
Default values : 75
Range : 0-100
Resolution : 1
Unit : %
2-pwrAdmOffset
Default values : 10
Range : 0-100
Resolution : 1
Unit : %
3-beMarginDlPwr
Default values : 10
Range : 0-100
Resolution : 1
Unit : %
INPUT FROM ASE MONITOR (UL) :
three parameters aseUlAdm, beMarginAseUl and aseUlAdmOffset.
1- aseUlAdm
Description:
Admission limit on ASE in the uplink.Used by Admission Control, in Admission Request Handler.Takes effect: Immediately
Default value: 240
Range : 0-500
Resolution : 1
Unit : ASE
2- beMarginAseUl
Default value: 20
Range : 0-500
Resolution : 1
Unit : ASE
3- aseUlAdmOffset
Default value: 40
Range : 0-500
Resolution : 1
Unit : ASE
INPUT FROM ASE MONITOR (DL) :
Two parameters aseDlAdm and beMarginAseDl
1- aseDlAdm
Description :
Admission limit on ASE in the downlink.Used by Admission Control, in Admission Request Handler.Takes effect: Immediately
Default value: 240
Range : 0-500
Resolution : 1
Unit : ASE
2-beMarginAseDl
Default value: 100
Range : 0-500
Resolution : 1
Unit : ASE
DOWNLINK CODE ALLOCATION:
Two parameters dlCodeAdm and beMarginDlCode
1-dlCodeAdm
Description:
Admission limit based on downlink channelization code tree usage. Expressed as percentage of the code tree currently in use.Used by Admission Control, in Admission Request Handler.Takes effect: Immediately
Default value: 80
Range : 0-100
Resolution : 1
Unit : %
2-beMarginDlCode
Default value: 10
Range : 0-100
Resolution : 5
Unit : %
The RBS Hardware Monitor ( UL ) :
Two parameters ulHwAdm and beMarginUlHw
1- ulHwAdm
Description:
Admission limit on RBS uplink hardware resource utilization, applicable to all admission requests.Setting ulHwAdm to 100 % will disable the uplink hardware admission policy.Takes effect: Immediately
Default value: 100
Range : 0-100
Resolution : 1
Unit : %
2- beMarginUlHw
Default value: 0
Range : 0-100
Resolution : 1
Unit : %
The RBS Hardware Monitor ( DL ) :
Two parameters dlHwAdm and beMarginDlHw
1- dlHwAdm
Description:
Admission limit on RBS downlink hardware resource utilization, applicable to all admission requests.Setting dlHwAdm to 100 % will disable the downlink hardware admission policy.Takes effect: Immediately
Default value: 100
Range : 0-100
Resolution : 1
Unit : %
2- beMarginDlHw
Default value: 0
Range : 0-100
Resolution : 1
Unit : %
Spreading factor Usage
The operator can limit the number of BE users by setting the parameters sf8Adm, sf16Adm and sf32Adm
1-sf8Adm
Description:
Admission limit for non-guaranteed traffic class connections with DL SF = 8. Maximum number of radio links with Spreading Factor = 8 in the downlink (DL SF = 8) for which new admission requests for non-guaranteed traffic classes will continue to be allowed. Reaching or exceeding this number of DL SF = 8 radio links will block setup and addition in this cell of more non-guaranteed traffic class radio links that would require DL SF = 8.
The default setting disables the admission policy. However, the actual setting may need to deviate from the default, in order to limit the number of simultaneous high bit rate connections in a cell, typically to deal with limitations in transport network dimensioning (to prevent all TN resources from being claimed by non-guaranteed traffic class connections).
Used by Admission Control, in Admission Request Handler.Takes effect: Immediately
Default value: 8
Range : 0-8
Resolution : 1
Unit : no. of radio links
2-sf16Adm
Default value: 16
Range : 0-16
Resolution : 1
Unit : no. of radio links
3-sf32Adm
Default value: 32
Range : 0-32
Resolution : 1
Unit : no. of radio links
Compressed mode
Admission control checks the present number of radio links in compressed mode (compModeAdm) when it receives a request for a radio link in compressed mode. This check is done to avoid too much interference from the compressed mode radio users.
compModeAdm
Description:
Admission limit on the number of radio links in compressed mode in this cell.Takes effect: Immediately
Default value: 15
Range : 0-128
Resolution : 1
Unit : no. of radio links
Congestion Control Parameters
1-Congestion Detection:
iFCong
Description:
Threshold at which this cell is considered to be congested in the uplink.The default setting disables uplink congestion measurements, in order to prevent problems during upgrading.
Range: 0..621
Default value: 621 [-49.9]
Resolution : 1 [0.1]
Unit: 0.1 dBm
Value mapping:
0 : -112 dBm1 : -111.9 dBm...130 : -99 dBm...620 : -50 dBm621 : -49.9 dBm
Takes effect: Re-initiation of UL RTWP measurements
ifOffset
Description:
Congestion due to radio overload in uplink is detected when the uplink interference exceeds a certain configurable threshold for a longer time than the hysteresis time.
The uplink interference threshold is determined by iFCong + ifOffset and the hysteresis time by ifHyst as shown in Figure.
Range : 0..621 [0..62.1]
Default value : 0 [0.0]
Resolution : 1 [0.1]
Unit : 0.1 dB [dB]
iFHyst
Description:
Hysteresis time for detection of congestion in the uplink RTWP in this cell.When the measured RTWP has been above the detection level (defined by iFCong) for this length of time, this cell is considered to be congested in the uplink.
Likewise, when the measured RTWP has been below the resolve level (defined by iFCong) for this length of time, the uplink cell congestion is considered to be resolved (unless resolving of congestion is indicated earlier by one of the periodic measurement reports).
The default setting disables uplink congestion measurements, in order to prevent problems during upgrading. However, the actual setting depends on the duration of peaks in the uplink RTWP, which are influenced by UE behavior and power control settings (and can cause 'false' uplink cell congestion detection).
Range: 0..6000
Default value : 6000 [60000]
Resolution : 1 [10]
Unit: 10 ms
Takes effect: Re-initiation of UL RTWP measurements
pwrHyst
Description:
Hysteresis time for detection of congestion in the downlink transmitted carrier power.When the measured power has been above the detection level (pwrAdm + pwrOffset) for this length of time, this cell is considered to be congested in the downlink.
Likewise, when the measured power has been below the resolve level (pwrAdm) for this length of time, the downlink cell congestion is considered to be resolved (unless resolving of congestion is indicated earlier by one of the periodic measurement reports).
The default setting has been chosen to avoid false downlink cell congestion detection. However, the actual setting may need to deviate from the default, depending on the duration of peaks in the downlink transmitted carrier power, which are influenced by UE behavior and power control settings (and can cause 'false' downlink cell congestion detection).Used by Congestion Control.The configured value is divided by 10 by the RNC traffic application before being sent on Nbap to the RBS.
Range : 0..60000
Default value : 300
Resolution : 10
Unit: ms
Takes effect: Re-initiation of DL TX carrier power measurements
pwrOffset
Description:
Cell carrier power offset. Expressed relative to the lower of maximumTransmissionPower (configured in this UtranCell instance) and maxDlPowerCapability (configured in the corresponding instance of RbsLocalCell in the RBS).Used by Congestion Control.
Range : 0..100
Default value : 5
Resolution : 1
Unit: %
Takes effect: Re-initiation of DL TX carrier power measurements.
Dependencies: pwrAdm + pwrOffset <= 100 %
2-Congestion Resolve Parameters:
releaseAseDl
Description:
Amount of ASE in the downlink to be released with each periodic congestion-resolution action targeting the guaranteed traffic class connections in this cell.
The default setting is a reference case setting. However, the actual setting may need to deviate from the default, depending on the required speed to resolve the downlink cell congestion situation and the characteristics of the guaranteed traffic class services in the network.Used by Congestion Control.
Range: 0..500
Default value : 1
Resolution : 1
Unit: ASE
Special values:
0 indicates that no ASE is released for guaranteed traffic class connections. This prevents congestion-resolution actions on the guaranteed traffic class connections in the cell.
Takes effect: Immediately
releaseAseDlGhs
Description:
Amount of ASE in the downlink to be released with each periodic congestion-resolution action targeting the guaranteed high speed traffic class connections in this cell.
The default setting is a reference case setting. However, the actual setting may need to deviate from the default, depending on the required speed to resolve the downlink cell congestion situation and the characteristics of the guaranteed high speed traffic class services in the network.
Used by Congestion Control
Range : 0..5000 [0..500.0]
Default value : 0 [0]
Resolution : 1 [0.1]
Unit : 0.1 ASE [ASE]
releaseAseDlNg
Description:
Amount of ASE in the downlink to be released with each periodic congestion-resolution action targeting the non-guaranteed traffic class connections in this cell.
The default setting is a reference case setting. However, the actual setting may need to deviate from the default, depending on the required speed to resolve the downlink cell congestion situation and the characteristics of the non-guaranteed traffic class services in the network.
Used by Congestion Control.
Range : 0..500
Default value : 3
Resolution : 1
Unit: ASE
Special values:
0 indicates that no ASE is released for non-guaranteed traffic class connections. This prevents congestion-resolution actions on the non-guaranteed traffic class connections in the cell.
Takes effect: Immediately
tmCongAction
Description:
Interval between periodic congestion-resolution actions targeting the guaranteed traffic class connections in this cell.
The default setting is a reference case setting. However, the actual setting may need to deviate from the default, depending on the required speed to resolve the downlink cell congestion situation and the characteristics of the guaranteed traffic class services in the network.
Used by Congestion Control.
Range: 300..100000
Default value : 2000
Resolution : 1
Unit: ms
Takes effect: Immediately
tmCongActionNg
Description:
Interval between periodic congestion-resolution actions targeting the non-guaranteed traffic class connections in this cell.
The default setting is a reference case setting. However, the actual setting may need to deviate from the default, depending on the required speed to resolve the downlink cell congestion situation and the characteristics of the non-guaranteed traffic class services in the network.
Used by Congestion Control.
Range : 500..100000
Default value : 800
Resolution : 1
Unit: ms
Takes effect: Immediately
tmInitialG
Description:
Minimum time before congestion-resolution actions are initiated on guaranteed traffic class connections in this cell, after detection of downlink cell congestion.
The default setting is a reference case setting. However, the actual setting may need to deviate from the default, depending on the required speed to resolve the downlink cell congestion situation and the characteristics of the guaranteed traffic class services in the network.
Used by Congestion Control.
Range : 10..100000
Default value : 3000
Resolution : 1
Unit: ms
Takes effect: Immediately
![Congestion Control In wireless Networks [ PAC: Perceptive Admission Control Protocol]](https://img.dokumen.tips/doc/110x75/5681503b550346895dbe378e/congestion-control-in-wireless-networks-pac-perceptive-admission-control.jpg)
