mod ucellcac

Modify Cell Oriented CAC Algorithm Parameters(MOD UCELLCAC)Function

Use this command to modify cell-oriented Call Admission Control (CAC) algorithm parameters.

In actual operation, it is necessary to modify the CAC algorithm parameters based on the network management experience and algorithm analysis results, so as to achieve the following purposes:

1. Set coverage ranges for various services: set the restrictions on the transmit power of different services to satisfy different coverage requirements according to the network planning. Note that the coverage specification must be taken into consideration together with the capacity specification.

2. Restrict services proportions in a cell: restrict the number of different services by setting different admission thresholds for conversational and other services, so as to ensure the priority of conversational service.

3. Optimize resource configuration (1): set different admission thresholds for conversational service, other services and the services in handover state, so as to ensure the handover success rate, as well as the priority of conversational service.

4. Optimize resource configuration (2): reserve resources for UL/DL common channels so as to guarantee service transmission on the common channels.

Note

1. [Cell environment type] is set to TU generally. In most cases, this parameter should not be changed.

2. Following restriction must be satisfied:

1)MAX(UL handover access threshold,UL threshold of Conv AMR service,UL threshold of Conv non_AMR service,UL threshold of other services) >= [UL LDR trigger threshold] >= [UL LDR release threshold];

2)[Ul HandOver Credit Reserved SF] >= [Ul LDR Credit SF reserved threshold];

3)[DL OLC trigger threshold] >= [DL total power threshold] >= [DL handover access threshold] > [DL threshold of Conv AMR service], [DL threshold of Conv non_AMR service]> [DL threshold of other services] ;

4)MAX(DL handover access threshold,DL threshold of Conv AMR service,DL threshold of Conv non_AMR service,DL threshold of other services) >= [DL LDR trigger threshold] > [DL LDR release threshold];

5)[Dl HandOver Credit and Code Reserved SF] >= [Dl LDR Credit SF reserved threshold];

[Dl HandOver Credit and Code Reserved SF] >= [Cell LDR SF reserved threshold];

[MTCH maximal power] > [MTCH reserve power];

[MTCH maximal power SF] > [MTCH reserve SF].

6)[Ul TotalPower CAC threshold] > [UL Target LoadFactor].

The parameters of [UL LDR trigger threshold], [DL LDR trigger threshold]and [DL OLC trigger threshold] are set in ADD UCELLLDM and MOD UCELLLDM, and they can be listed by LST UCELLLDM. The parameters of [Dl LDR Credit SF reserved threshold] and [Cell LDR SF reserved threshold] are set in ADD UCELLLDR and MOD UCELLLDR, and they can be listed by LST UCELLLDR. The parameters of [UL Target LoadFactor] is set in MOD UCELLHSUPA.

3. ErgchEhichCodeNum in the ADD UCELLHSUPA command specifies the Code Number for E-RGCH/E-HICH. The following restraint condition must be satisfied: [Code Number for E-RGCH/E-HICH * 20] >=[MaxHsupaUserNum].

Parameters

Parameter ID Parameter Name

Parameter Description

CellId Cell ID Meaning: The logical cell ID uniquely identifies a cell in a radio network.

The logical cell ID is configured at the BSC6900. The BSC6900 sends the cell ID to the base station during a cell setup procedure. The mapping between logical cell IDs and local cell IDs are configured at the BSC6900.

The BSC6900 supports a maximum of 5100 logical cells. Logical cells are uniquely but not necessarily consecutively numbered within a BSC6900. For example, you can set the ID of a logical cell to 0 and that of another logical cell to 2.



For clear and easy identification, adhere to the following numbering principles:

Specify different number ranges for logical cells in different subracks. For example, you can specify the range of 0 to 899 for the logical cells in subrack 0 (MPS) and the range of 900 to 1799 for the logical cells in subrack 1 (EPS).For detailed information about this parameter, see 3GPP TS 25.401.

GUI Value Range: 0~65535

Unit: None

Actual Value Range: 0~65535

MML Default Value: None

Recommended Value: None

Parameter Relationship: None

Service Interrupted After Modification: N/A

Impact on Network Performance: None



CellEnvType Cell environment type

Meaning: Defining the radio environment type of the cell, such as a typical town cell, urban cell, and mountain area cell.

GUI Value Range: TU, RA, HT

Unit: None

Actual Value Range: TU, RA, HT


Recommended Value: TU


Service Interrupted After Modification: No (And no impact on the UE in idle mode)


UlNonCtrlThdForAMR UL threshold of Conv AMR service

Meaning: 1. The percentage of the conversational AMR service threshold to the 100% uplink load. The parameter is used for controlling the AMR service admission. That is, when an AMR service is accessing, the RNC evaluates the measurement value of the



uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access of an AMR speech service, this service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted. The UL load factor thresholds include parameters of [UL threshold of Conv AMR service], [UL threshold of Conv non_AMR service], [UL handover access threshold] and [UL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of the conversational AMR service. If the value is too high the system load after admission may be over large, which impacts system stability and leads to system congestion. If the value is too low, the possibility of user rejects may increase, resulting in waste in idle resources.

2. When the Uplink CAC algorithm switch is set to ALGORITHM_FOURTH, the Recommended Value should be changed to 83.


Unit: %





Recommended Value: 75

Parameter Relationship: MAX(UlNonCtrlThdForHo, UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther) >= UlLdrTrigThd >= UlLdrRelThd(For detailed information, refer to ADD UCELLLDM).


Impact on Network Performance: If the parameter value is large, more users are admitted but system congestion is easy to happen, affecting system stability and the quality of active services. If the parameter value is small, the user admission success rate decreases, resulting in low resource utilization.

UlNonCtrlThdForNonAMR UL threshold of Conv non_AMR service

Meaning: 1. The percentage of the conversational non-AMR service threshold to the 100% uplink load. The parameter is used for controlling the non-AMR service admission. That is, when a non-AMR service is accessing, the RNC evaluates the measurement value of the uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access of a non-AMR speech service, this



service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted.

2. The UL load factor thresholds include parameters of [UL threshold of Conv AMR service], [UL threshold of Conv non_AMR service], [UL handover access threshold] and [UL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of the conversational non-AMR service.



Unit: %






Parameter Relationship: The value of this parameter must satisfy the following relationship: MAX(UlNonCtrlThdForHo, UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther) >= UlLdrTrigThd >= UlLdrRelThd (For detailed information, refer to ADD UCELLLDM).



UlNonCtrlThdForOther UL threshold of other services

Meaning: 1. The percentage of other service thresholds to the 100% uplink load. The services refer to other admissions except the conversational AMR service, conversational non-AMR service, and handover scenarios. The parameter is used for controlling other service admissions. That is, when a service is accessing, the RNC evaluates the measurement value of the uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access of a service, this service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted.

2. The UL load factor thresholds include



parameters of [UL threshold of Conv AMR service], [UL threshold of Conv non_AMR service], [UL handover access threshold] and [UL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of other services.



Unit: %




Parameter Relationship: The value of this parameter must satisfy the following relationship: MAX(UlNonCtrlThdForHo, UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR,



UlNonCtrlThdForOther) >= UlLdrTrigThd >= UlLdrRelThd (For detailed information, refer to ADD UCELLLDM).


Impact on Network Performance: If the parameter value is large, more users are admitted but the system load becomes heavy, leading to congestion and affecting system stability. If the parameter value is small, users are difficult to be admitted, resulting in low resource utilization.

DlConvAMRThd DL threshold of Conv AMR service

Meaning: 1. The percentage of the conversational AMR service threshold to the 100% downlink load. The parameter is used for controlling the AMR service admission. That is, when an AMR service is accessing, the RNC evaluates the measurement value of the downlink load after the service is accessed. If the DL load of a cell is higher than this threshold after the access of an AMR speech service, this service will be rejected. If the DL load of a cell will not be higher than this threshold, this service will be admitted.

2. The DL load factor thresholds include parameters of [DL threshold of Conv AMR service],[DL threshold of Conv non_AMR service], [DL threshold of other services] and [DL handover access threshold]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access



priority of the conversational AMR service.


Unit: %




Parameter Relationship: The value of this parameter must satisfy the following relationship: DlHOThd > DlConvAMRThd; DlConvAMRThd > DlOtherThd.


Impact on Network Performance: If the value is too high the system load after admission may be over large, which impacts system stability and leads to system congestion. If the value is too low, the possibility of user rejects may increase, resulting in waste in



idle resources and the failure to achieving network planning target.

DlConvNonAMRThd DL threshold of Conv non_AMR service

Meaning: 1. The percentage of the conversational non-AMR service threshold to the 100% downlink load. The parameter is used for controlling the non-AMR service admission. That is, when a non-AMR service is accessing, the RNC evaluates the measurement value of the downlink load after the service is accessed. If the DL load of a cell is higher than this threshold after the access of a non-AMR speech service, this service will be rejected. If the DL load of a cell will not be higher than this threshold, this service will be admitted.

2. The DL load factor thresholds include parameters of [DL threshold of Conv AMR service], [DL threshold of Conv non_AMR service], [DL threshold of other services] and [DL handover access threshold]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of the conversational non-AMR service.


Unit: %






Parameter Relationship: The value of this parameter must satisfy the following relationship: DlHOThd > DlConvNonAMRThd; DlConvNonAMRThd > DlOtherThd.


Impact on Network Performance: If the value is too high the system load after admission may be over large, which impacts system stability and leads to system congestion. If the value is too low, the possibility of user rejects may increase, resulting in waste in idle resource and the failure to achieving the network planning target.

DlOtherThd DL threshold of other services

Meaning: 1. The percentage of other service thresholds to the 100% downlink load.The services refer to other admissions except the conversational AMR service,conversational non-AMR service,and handover scenarios. The parameter is used for controlling other service admissions.That is,when a service is accessing,the RNC evaluates the measurement value of the downlink load after the service is accessed.If the DL load of a cell is higher than this threshold after the access of a service, this service will be rejected. If the DL load of a cell will not be higher than



this threshold, this service will be admitted.

2. The DL load factor thresholds include parameters of [DL threshold of Conv AMR service],[DL threshold of Conv non_AMR service], [DL threshold of other services] and [DL handover access threshold].The four parameters can be used to limit the proportion between the conversational service,handover user and other services in a specific cell, and to guarantee the access priority of other services.


Unit: %




Parameter Relationship: The value of this parameter must satisfy the following relationship: DlConvAMRThd > DlOtherThd; DlConvNonAMRThd > DlOtherThd; DlOtherThd >= DlLdrTrigThd(See ADD UCELLLDM).




Impact on Network Performance: If the value is too high the system load after admission may be over large, which impacts system stability and leads to system congestion. If the value is too low, the possibility of user rejects may increase, resulting in waste in idle resources and the failure to achieving network planning target.

UlNonCtrlThdForHo UL handover access threshold

Meaning: 1. The percentage of the handover service admission threshold to the 100% uplink load.The parameter is used for controlling the handover admission. That is, when a service is handing over to a cell, the RNC evaluates the measurement value of the uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access, this service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted.



Unit: %






Parameter Relationship: The value of this parameter must satisfy the following relationship: MAX(UlNonCtrlThdForHo, UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther) >= UlLdrTrigThd >= UlLdrRelThd (For detailed information, refer to ADD UCELLLDM).



DlHOThd DL handover access threshold

Meaning: The percentage of the handover service admission threshold to the 100% downlink load. The parameter is used for controlling the handover admission. That is, when a service is handing over to a cell, the



RNC evaluates the measurement value of the downlink load after the service is accessed. If the DL load of a cell is higher than this threshold after the access, this service will be rejected. If the DL load of a cell will not be higher than this threshold, this service will be admitted.


Unit: %




Parameter Relationship: The value of this parameter must satisfy the following relationship: DlCellTotalThd >= DlHOThd ; DlHOThd > DlConvAMRThd; DlHOThd > DlConvNonAMRThd





UlCellTotalThd UL total power threshold

Meaning: Admission threshold of total cell uplink power. This parameter is related to the target load of the uplink schedule.


Unit: %




Parameter Relationship: The value of this parameter must satisfy the following relationship: MaxTargetUlLoadFactor(See MOD UCELLHSUPA) < UlCellTotalThd.





DlCellTotalThd DL total power threshold

Meaning: Admission threshold of the total cell downlink power. If the value is too high, too many users will be admitted. However, the throughput of a single user is easy to be limited. If the value is too low, cell capacity will be wasted.


Unit: %






Parameter Relationship: The value of this parameter must satisfy the following relationship: DlOlcTrigThd(See ADD UCELLLDM) >= DlCellTotalThd; DlCellTotalThd >= DlHOThd



UlCCHLoadFactor UL common channel load reserved coefficient

Meaning: The admission control decision is only for dedicated channels. For common channels, some resources instead of a special admission procedure are reserved.

In the UL, according to the current load factor and the characteristics of the new call, the UL CAC algorithm predicts the new traffic channels load factor with the assumption of admitting the new call, then plus with the premeditated common channel UL load factor to get the predicted UL load factor. Then, compare it with the UL admission threshold. If the value is not higher than the threshold, the call is admitted; otherwise, rejected.




Unit: %






Impact on Network Performance: If the parameter value is large, more resources are reserved for common channels, improving the quality of active services but reducing the power resource utilization and system capacity. If the parameter value is small, power resources can be fully utilized but cell coverage is affected in case of insufficient resources.

DlCCHLoadRsrvCoeff DL common channel load reserved coefficient

Meaning: Different admission policies are used for dedicated channel and common channel users. For common channel users, resources instead of separate power admission decision are reserved. For dedicated channel users, according to the current load factor and the characteristics of



the new call, the CAC algorithm predicts the new TX power with the assumption of admitting the new call, then plus with the premeditated common channel DL load factor to get the predicted DL load factor. Then, compare it with the DL admission threshold. If the value is not higher than the threshold, the call is admitted; otherwise, rejected.


Unit: %









DlInterFactor DL neighbour interference factor

Meaning: Ratio of the downlink interference produced by intra-frequency neighboring cells to the total downlink interference in the serving cell.

This parameter is an advanced parameter. To modify this parameter, contact Huawei Customer Service Center for technical support.


Unit: None

Actual Value Range: 0~2, step:0.01





Impact on Network Performance: If the parameter value is small, the evaluated



interference from intra-frequency neighboring cells is low and more users will be admitted, leading to system congestion. If the parameter value is large, the evaluated interference from intra-frequency neighboring cells is high and the user admission success rate decreases, reducing system capacity.

UlTotalEqUserNum UL total equivalent user number

Meaning: When the ENU-based admission algorithm is used for uplink admission control, this parameter defines the total number of equivalent users corresponding to the 100% uplink load. Set this parameter to suit the admission control threshold and the network's actual situation.


Unit: None








Impact on Network Performance: If the parameter value is large, the cell capacity for uplink equivalent user number (ENU) is large and more users will be admitted. In this situation, system congestion is easy to happen, affecting system stability and the quality of active services. If the parameter value is small, the cell capacity for uplink ENU is small and the user admission success rate decreases. In this situation, system resource utilization is reduced.

DlTotalEqUserNum DL total equivalent user number

Meaning: When the ENU-based admission algorithm is used for downlink admission control, this parameter defines the total number of equivalent users corresponding to the 100% downlink load. Set this parameter to suit the admission control threshold and the network's actual situation.


Unit: None








Impact on Network Performance: If the parameter value is large, the cell capacity for downlink equivalent user number (ENU) is large and more users will be admitted. In this situation, system congestion is easy to happen, affecting system stability and the quality of active services. If the parameter value is small, the cell capacity for downlink ENU is small and the user admission success rate decreases. In this situation, system resource utilization is reduced.

HsupaNonServInterfereFactor HSUPA Non-Server cell interfere factor

Meaning: Ratio of the received uplink power on the non-serving radio links (RLs) to the total received uplink power of an HSUPA cell.

A non-serving RL is an E-DCH RL established by a UE in a non-serving cell.

You are advised to increase the value of this parameter when a large number of HSUPA UEs perform soft handovers in the cell. For details about this parameter, see 3GPP TS 25.214.

This parameter is an advanced parameter. To modify this parameter, contact Huawei Customer Service Center for technical



support.


Unit: %






Impact on Network Performance: If the parameter value is small, the evaluated uplink interference produced by non-serving links is low and more users will be admitted. This increases cell capacity but cell congestion is easy to happen. If the parameter value is large, the evaluated uplink interference produced by non-serving links is high and the user admission success rate decreases. This



prevents cell congestion and guarantees the quality of active services.

HsupaLowPriorityUserPBRThd Low priority HSUPA user PBR threshold

Meaning: Threshold of all the HSUPA user PBR whose schedule priority is lower than that of users to be admitted.


Unit: %






Impact on Network Performance: If this value is too high, the possibility of rejecting HSUPA schedule services increases, which impacts access success rate. If the value is too



low, too many HSUPA schedule users will be admitted, which impacts the admitted users and results in overload and system congestion.

HsupaEqualPriorityUserPBRThd

Equal priority HSUPA user PBR threshold

Meaning: Threshold of all the HSUPA user PBR whose schedule priority is the same as that of users to be admitted.


Unit: %






Impact on Network Performance: If this value is too high, the possibility of rejecting



HSUPA schedule services increases, which impacts access success rate. If the value is too low, too many HSUPA schedule users will be admitted, which impacts the admitted users and results in overload and system congestion.

HsupaHighPriorityUserPBRThd High priority HSUPA user PBR threshold

Meaning: Threshold of all the HSUPA user PBR whose schedule priority is higher than that of users to be admitted.


Unit: %








Impact on Network Performance: If this value is too high, the possibility of rejecting HSUPA schedule services increases, which impacts access success rate. If the value is too low, too many HSUPA schedule users will be admitted, which impacts the admitted users and results in overload and system congestionRecommended.

UlHsDpcchRsvdFactor UL HS-DPCCH reserve factor

Meaning: Load resources reserved for the uplink HS-DPCCH carrying ACK/NACK. For an HSPA-capable cell, the admission control algorithm makes admission decisions by using an estimated load factor. The estimated load factor is the sum of estimated uplink load factor based on service properties, uplink load factor for common channels, and uplink load factor for the HS-DPCCH carrying ACK/NACK.


Unit: %









HsdpaStrmPBRThd Hsdpa streaming PBR threshold

Meaning: Average throughput admission threshold of the HSDPA streaming service. If the sum of PBR of all the accessed streaming users is lower than the average throughput admission threshold of the HSDPA streaming service multiplied by the sum of GBR of all the accessed streaming users, it indicates that the QoS of the accessed users cannot be satisfied and new HSDPA streaming services are not allowed. Otherwise, the QoS can be satisfied and new HSDPA streaming services are allowed.


Unit: %








Impact on Network Performance: If the parameter value is too large, admission of the HSDPA streaming services becomes difficult. In this case, the service quality of the HSDPA streaming services improves but the HSDPA service capacity decreases. If the parameter value is too low, admission of the HSDPA streaming services becomes easy. In this case, the HSDPA service capacity increases but the service quality of the active HSDPA streaming services cannot be guaranteed.

HsdpaBePBRThd HSDPA best effort PBR threshold

Meaning: Average throughput admission threshold of the HSDPA best effort traffic. If the sum of PBR of all the accessed HSDPA BE users is lower than the average throughput admission threshold of the HSDPA BE service multiplied by the sum of GBR of all the accessed HSDPA BE users, it indicates that the QoS of the accessed users cannot be satisfied and new HSDPA BE services are not allowed. Otherwise, the QoS can be satisfied and new HSDPA BE services are allowed.




Unit: %






Impact on Network Performance: If the parameter value is too large, admission of the HSDPA BE services becomes difficult. In this case, the service quality of the HSDPA BE services improves but the HSDPA BE service capacity decreases. If the parameter value is too low, admission of the HSDPA BE services becomes easy. In this case, the HSDPA BE service capacity increases but the quality of the active HSDPA BE services cannot be guaranteed.

MaxHsdpaUserNum Maximum HSDPA user number

Meaning: Maximum number of users supported by the HSDPA channel. The user in this parameter refers to the user with services on the HSDPA channel, regardless of the number of RABs carried on the



HSDPA channel. Maximum HSDPA user number cannot exceed the HSDPA capability of the NodeB product, In practice, the value can be set based on the cell type and the richness of the available HSDPA power and code resources.


Unit: None






Impact on Network Performance: If the value is too low, the cell HSDPA capacity may be reduces, leading to waste in HSDPA resources. If the value is too high, HSDPA services may be congested.



MaxUlTxPowerforConv Max UL TX power of conversational service

Meaning: Maximum UL transmit power for conversational service in a specific cell. It is based on the UL coverage requirement of the conversational service designed by the network planning.For detailed information of the related IE "Maximum allowed UL TX power", refer to the 3GPP TS 25.331.

GUI Value Range: -50~33

Unit: dBm

Actual Value Range: -50~33





Impact on Network Performance: The larger the value of this parameter is, the wider the coverage of the corresponding services will be. When the downlink coverage is exceeded,



the uplink coverage and downlink coverage of the service will become unbalanced. If the values of these parameters are too small, the uplink coverage will probably be smaller than the downlink coverage of the service.

MaxUlTxPowerforStr Max UL TX power of streaming service

Meaning: Maximum UL transmit power for the streaming service in a specific cell. It is based on the UL coverage requirement of the streaming service designed by the network planning.For detailed information of the related IE "Maximum allowed UL TX power", refer to the 3GPP TS 25.331.


Unit: dBm





Service Interrupted After Modification: No



(And no impact on the UE in idle mode)

Impact on Network Performance: The larger the value of this parameter is, the wider the coverage of the corresponding services will be. When the downlink coverage is exceeded, the uplink coverage and downlink coverage of the service will become unbalanced. If the values of these parameters are too small, the uplink coverage will probably be smaller than the downlink coverage of the service.

MaxUlTxPowerforInt Max UL TX power of interactive service

Meaning: The maximum UL transmit power for the interactive service in a specific cell. It is based on the UL coverage requirement of the interactive service designed by the network planning.For detailed information of the related IE "Maximum allowed UL TX power", refer to the 3GPP TS 25.331.


Unit: dBm








Impact on Network Performance: The larger the value of this parameter is, the wider the coverage of the corresponding services will be. When the downlink coverage is exceeded, the uplink coverage and downlink coverage of the service will become unbalanced. If the values of these parameters are too small, the uplink coverage will probably be smaller than the downlink coverage of the service.

MaxUlTxPowerforBac Max UL TX power of background service

Meaning: The maximum UL transmit power for background service in a specific cell. It is based on the UL coverage requirement of the background service designed by the network planning.For detailed information of the related IE "Maximum allowed UL TX power", refer to the 3GPP TS 25.331.


Unit: dBm








Impact on Network Performance: The larger the value of this parameter is, the wider the coverage of the corresponding services will be. When the uplink coverage is too large, the uplink coverage and downlink coverage of the service can become unbalanced. If the values of these parameters are too small, the uplink coverage will probably be smaller than the downlink coverage of the service.

BackgroundNoise Background noise

Meaning: If [Auto-Adaptive Background Noise Update Switch] is set to OFF, it is used to set background noise of the cell. If [Auto-Adaptive Background Noise Update Switch] is set to ON, new background noise is restricted by this parameter and BgnAbnormalThd. For detailed information of this parameter, refer to the 3GPP TS 25.133.


Unit: None



Actual Value Range: -112~-50






RrcProcSrbDelay RRC Proc SRB delay

Meaning: Delay for UEs to transmit uplink SRBs during an RRC setup. When setting up a new RL during a hard handover, a UE must not transmit any uplink SRB within this delay to prevent data loss. For details about this parameter, see 3GPP TS 25.214.





Unit: frame






Impact on Network Performance: The larger the value of this parameter, the longer the delay for UEs to send uplink SRBs. In such a case, much more time is reserved for uplink and downlink synchronization. This increases the SRB transmission success rate and the dedicated link setup success rate. The smaller the value of this parameter is, the earlier UEs transmit uplink SRBs. In such a case, however, these UEs may have not completed uplink or downlink synchronization. If this occurs, uplink interference increases and the dedicated link setup success rate decreases.

RrcProcPcPreamble RRC Proc DPCCH PC preamble length

Meaning: PC Preamble in which UEs are only allowed to transmit control information over an uplink DPCCH during an RRC setup process. Within the period specified by PC



preamble, these UEs are not allowed to transmit any data over an uplink DPDCH. After a UE starts transmitting control information over an uplink DPCCH, the NodeB usually delays in receiving the information. This delay depends on the multi-path searching process and transmission delay. If the UE starts transmitting data over an uplink DPDCH before uplink synchronization is complete, the NodeB occasionally fails to receive some data. If RLC blocks work in acknowledge mode, retransmission will prolong data transmission. For details about this parameter, see 3GPP TS 25.214.



Unit: frame








Impact on Network Performance: The larger the parameter value is,the longer time is reserved for uplink or downlink synchronization during the initial setup of the dedicated link. Therefore, there is a higher probability that uplink or downlink synchronization succeeds, the transmission success rate over the DPDCH increases, and the dedicated link setup success rate increases. However, the dedicated link setup delay is prolonged. The smaller the parameter value is, the shorter time is reserved for uplink or downlink synchronization. The NodeB occasionally fails to receive data from UEs using the DPDCH. This decreases the transmission success rate and dedicated link setup success rate, but shortens the dedicated link setup delay.

HhoProcSrbDelay HHO Proc SRB delay

Meaning: Delay for UEs to transmit uplink SRBs during a hard handover. When setting up a new RL during a hard handover, a UE must not transmit any uplink SRBs within this delay to prevent data loss. For details about this parameter, see 3GPP TS 25.214.





Unit: frame






Impact on Network Performance: The larger the value of this parameter, the longer the delay for UEs to send uplink SRBs during a hard handover. In such a case, much more time is reserved for uplink and downlink synchronization. This increases the SRB transmission success rate as well as the hard handover success rate. The smaller the value of this parameter, the earlier UEs transmit uplink SRBs during a hard handover. In such a case, however, these UEs may have not completed uplink and downlink synchronization. If this occurs, uplink



interference increases and as a result the delay for these UEs to complete the hard handover prolongs.

HhoProcPcPreamble HHO Proc DPCCH PC preamble length

Meaning: Period in which UEs are only allowed to transmit control information over an uplink DPCCH during a hard handover procedure. Within this period, these UEs are not allowed to transmit any data. After a UE starts transmitting control information over an uplink DPCCH, the NodeB usually delays in receiving the information. This delay depends on the multi-path searching process and transmission delay. If the UE starts transmitting data over an uplink DPDCH before uplink synchronization is complete, the NodeB occasionally fails to receive some data. If RLC blocks work in acknowledged mode, retransmission will prolong data transmission. For details about this parameter, see 3GPP TS 25.214.



Unit: frame








Impact on Network Performance: If the parameter value is large, the time reserved for uplink and downlink synchronization during a hard handover becomes long. Therefore, there is a high probability that uplink and downlink synchronization succeeds, the transmission success rate over the DPDCH increases, and the hard handover success rate increases. However, the hard handover delay is prolonged. If the parameter value is small, the time reserved for uplink and downlink synchronization during a hard handover becomes short. The NodeB occasionally fails to receive data from UEs using the DPDCH. This decreases the transmission success rate, decreases the hard handover success rate, but reduces the hard handover delay.

DefPcpichEcNo Default PCPICH Ec/No

Meaning: When the RNC is performing downlink open loop power control, it evaluates link loss based on the PCPICH transmit power of the cell and the PCPICH signal strength measured by the UE to access the network. In some cases, the UE does not report the PCPICH signal strength. In this situation, the RNC uses this parameter and the PCPICH transmit power of the cell to evaluate link loss.




Unit: dB



Recommended Value: -13




BGNSwitch Auto-adaptive background noise update switch

Meaning: When the parameter is 'OFF', the auto-adaptive background noise update algorithm is switched off. Otherwise, the algorithm is switched on.

GUI Value Range: OFF, ON



Unit: None

Actual Value Range: OFF, ON


Recommended Value: ON




BGNFilterCoef Background noise filter coefficient

Meaning: Alpha filtering coefficient of the Auto-Adaptive Background Noise Update Algorithm.





Unit: %






Impact on Network Performance: A small parameter value results in strong anti-interference capability of the auto-adaptive background noise update algorithm. The possibility that the background noise is mistakenly updated decreases. However, a small parameter value leads to low sensitivity of the algorithm to variation of the measured RTWP at the physical layer. As a result, the background noise cannot be updated timely. A large parameter value leads to high sensitivity of the algorithm to variation of the measured RTWP at the physical layer. However, more errors are introduced if the actual load fluctuates frequently, affecting the performance of load control.

BGNAdjustTimeLen Background Meaning: Only when the measured



noise update continuance Time

background noise's duration reaches this parameter, the output of the auto-adaptive background noise update filter could be regarded as effect background noise, and the current value is replaced with the new one. At the same time, the auto-adaptive status should be restarted; otherwise, the output could not be regarded as the effective background noise.


Unit: s









BGNEqUserNumThd Equivalent user number threshold for background noise

Meaning: When the number of uplink equivalent users is not larger than this parameter, the RTWP could be regarded as background noise. Therefore, the measured RTWP could be input to the auto-adaptive background noise update filter; otherwise, the RTWP could not be regarded as background noise, and should not be input to the filter, and at the same time, the auto-adaptive status should be reset.


Unit: None









ShoInitPwrPo Initial power offset for SHO

Meaning: Power offset used for the calculation of a new RL' initial transmit power. This offset is used during a soft handover. Before this parameter value takes effect, the DPB algorithm must be activated. This algorithm can be activated by running the SET UCORRMALGOSWITCH command.



Unit: dB








Impact on Network Performance: If the parameter value is too large, the downlink initial transmit power for a new link will be very low, increasing the call drop rate. If the parameter value is too small, the downlink open-loop transmit power for a new link will be very high, wasting downlink power resources and affecting downlink cell capacity.

MaxHsupaUserNum Maximum HSUPA user number

Meaning: Maximum number of users supported by the HSUPA channel. The user in this parameter refers to the user with services on the HSUPA channel, regardless of the number of RABs carried on the HSUPA channel. Maximum HSUPA user number cannot exceed the HSUPA capability of the NodeB product, In practice, the value can be set based on the cell type and the richness of the available HSUPA power and code resources.


Unit: None








Impact on Network Performance: If the value is too high, HSUPA services may be congested. If the value is too low, the cell HSDPA capacity may be reduces, leading to waste in HSUPA resources.

DlHSUPARsvdFactor Dl HSUPA reserved factor

Meaning: Reserved DL power factor for HSUPA user. The higher the value is, the more resources reserved for the HSUPA control channel, which leads to resource waste. If the value is too low, HSUPA user quality may be impacted.


Unit: %









DlMBMSRsvdFactor DL MBMS reserved factor

Meaning: Reserved DL power factor for MBMS service.


Unit: %









MtchRsvPwr MTCH reserve power

Meaning: Available guarantee power of all the MTCHs. This parameter is a protection for the MBMS PTM bearing. When the power of all the MTCHs are little, pre-emption of MBMS PTM bearing should be avoided. This is because the MBMS PTM bearing serves multiple users at the same time. The value should not be too high. Otherwise, all the system resources may be consumed by the MBMS PTM bearing and too little capacity is left for the non-MBMS services.


Unit: %






Parameter Relationship: The value of this parameter must satisfy the following relationship: MtchMaxPwr >= MtchRsvPwr.


Impact on Network Performance: If the parameter value is too small, few resources are reserved for MBMS services, affecting the quality of MBMS services. If the parameter value is too large, MBMS services occupy too many resources, reducing the system capacity for non-MBMS services.

MtchRsvSf MTCH reserve SF

Meaning: Available guarantee codes of all the MTCHs. This parameter is a protection for the MBMS PTM bearing.


Unit: None






Parameter Relationship: The value of this parameter must satisfy the following relationship: MtchMaxSf >= MtchRsvSf



MtchMaxPwr MTCH maximal power

Meaning: Available guarantee codes of all the MTCHs. This parameter is a protection for the MBMS PTM bearing. When the codes of all the MTCHs are few, pre-emption of MBMS PTM bearing should be avoided. This is because the MBMS PTM bearing serves multiple users at the same time. The value should not be too high. Otherwise, all the system resources may be consumed by the MBMS PTM bearing and too little capacity is left for the non-MBMS services.


Unit: %






Parameter Relationship: The value of this parameter must satisfy the following relationship: MtchMaxPwr >= MtchRsvPwr



MtchMaxSf MTCH maximal SF

Meaning: Maximum code limit available for all MTCHs in a cell. This parameter sets a limit to the maximum codes available for all MBMS PTM services in a cell.


Unit: None






Parameter Relationship: The value of this parameter must satisfy the following relationship: MtchMaxSf >= MtchRsvSf


Impact on Network Performance: If the parameter value is too small, the code resources available for MBMS PTM services are limited, affecting the quality of MBMS services. If the parameter value is too large, MBMS services occupy too many resources, reducing the system capacity for non-MBMS services.

UlHoCeResvSf UL handover credit reserved SF

Meaning: Uplink Credit Reserved by Spread Factor for HandOver. SFOFF means that none of them are reserved for handover.

GUI Value Range: SF4(SF4), SF8(SF8), SF16(SF16), SF32(SF32), SF64(SF64), SF128(SF128), SF256(SF256), SFOFF(SFOFF)

Unit: None



Actual Value Range: SF4, SF8, SF16, SF32, SF64, SF128, SF256, SFOFF


Recommended Value: SF16(SF16)

Parameter Relationship: The value of this parameter must satisfy the following relationship:UlHoCeResvSf >= UlLdrCreditSfResThd.The comparison between the spreading factors is based on the number following the acronym "SF", for example,SF32>SF8.For detailed information,refer to ADD UCELLLDR.


Impact on Network Performance: If the parameter value is large, the credit resources reserved for handover UEs decrease. In this case, the possibility of admitting handover UEs decreases and the performance of handover UEs cannot be guaranteed. If the parameter value is small, the possibility of admitting new UEs decreases and the credit resource utilization is reduced.

DlHoCeCodeResvSf DL handover credit and code reserved

Meaning: This parameter defines the downlink code resource and credit resource that are reserved for handovers. The code



SF resource and credit resource are indicated by the spreading factor (SF). SFOFF indicates that no resources are reserved. If the SF value corresponding to the remaining resources on the downlink is smaller than this parameter value after a new service is admitted, the service request is rejected.


Unit: None




Parameter Relationship: The value of this parameter must satisfy the following relationship: DlHoCeCodeResvSf >= DlLdrCreditSfResThd; DlHoCeCodeResvSf >= CellLdrSfResThd.The comparison between the spreading factors is based on the number following the acronym "SF", for example,SF32>SF8.For detailed



information,refer to ADD UCELLLDR.


Impact on Network Performance: If the parameter value is large, the credit resources reserved for handover UEs decrease. In this case, the possibility of admitting handover UEs decreases and the performance of handover UEs cannot be guaranteed. If the parameter value is small, the possibility of admitting new UEs decreases and the credit resource utilization is reduced.

BgnStartTime Background noise update start time

Meaning: 1. This parameter, along with the [Algorithm stop time], is used to limit the validation time of the background noise automatic update algorithm. When [Algorithm stop time] is greater than [Algorithm start time], and the background noise automatic update algorithm is enabled, then the algorithm is activated during the period of [Algorithm start time] to [Algorithm stop time] each day. In other periods, the algorithm does not take effect.

2. Input format: HH&MM&SS.

GUI Value Range: hour, min, sec

Unit: None



Actual Value Range: hour{0~23}, min{0~59}, sec{0~59}



Parameter Relationship: The value of this parameter must satisfy the following relationship: BgnEndTime >BgnStartTime.



BgnEndTime Background noise update end time

Meaning: 1. This parameter, along with the [Algorithm start time], is used to limit the validation time of the background noise automatic update algorithm. When [Algorithm stop time] is greater than [Algorithm start time], and the background noise automatic update algorithm is enabled, then the algorithm is activated during the period of [Algorithm start time] to [Algorithm stop time] each day. In other periods, the algorithm does not take effect.

2. Input format: HH&MM&SS.

GUI Value Range: hour, min, sec



Unit: None

Actual Value Range: hour{0~23}, min{0~59}, sec{0~59}



Parameter Relationship: The value of this parameter must satisfy the following relationship: BgnEndTime >BgnStartTime .



BgnUpdateThd Background noise update trigger threshold

Meaning: The difference of RTWP that trigger the update of background noise. If the difference is larger than the threshold, the background will be updated.




Unit: 0.1dBm

Actual Value Range: 0.1~10



Parameter Relationship: The value of this parameter must satisfy the following relationship: BgnAbnormalThd >= BgnUpdateThd



BgnAbnormalThd Background noise abnormal threshold

Meaning: This parameter is applied when BGNSwitch is set to ON. (1) If the difference of measured background noise without filtered and the current background noise is larger than the RTWP threshold, the background noise will not be updated. (2) If the difference of new background noise and the configured value is larger than the RTWP threshold, the background noise will not be updated.




Unit: 0.1dB

Actual Value Range: 0.1~40



Parameter Relationship: The value of this parameter must satisfy the following relationship: BgnAbnormalThd >= BgnUpdateThd



MAXEFACHUserNum Maximum EFACH user number

Meaning: The parameter indicates the max user number the E-FACH channel can supports.




Unit: None







PTTSrbDelay PTT User Srb Delay

Meaning: Delay for PTT UEs to transmit uplink SRBs. When setting up a new RL, a PTT UE must not transmit any uplink SRB within this delay to prevent data loss. For details about this parameter, see 3GPP TS 25.214.





Unit: frame






Impact on Network Performance: The larger the value of this parameter, the longer the delay for PTT UEs to send uplink SRBs. In such a case, much more time is reserved for uplink and downlink synchronization. This increases the SRB transmission success rate and signaling process success rate. The smaller the value of this parameter, the earlier UEs transmit uplink SRBs. In such a case, however, these UEs may have not completed uplink or downlink synchronization. If this occurs, uplink interference increases and as a result the delay for these UEs to complete the



signaling process prolongs and the signaling process success rate is affected.

PTTPcPreamble PTT User DPCCH PC preamble length

Meaning: Period in which PPT UEs are only allowed to transmit control information over an uplink DPCCH. Within this period, these UEs are not allowed to transmit any data. After a UE starts transmitting control information over an uplink DPCCH, the NodeB usually delays in receiving the information. This delay depends on the multi-path searching process and transmission delay. If the UE starts transmitting data over an uplink DPDCH before uplink synchronization is complete, the NodeB occasionally fails to receive some data. If RLC blocks work in acknowledged mode, retransmission will prolong data transmission. For details about this parameter, see 3GPP TS 25.214.



Unit: frame








Impact on Network Performance: The larger the value of this parameter is, the longer the time is reserved for uplink and downlink synchronization. Therefore, there is a higher probability that uplink and downlink synchronization succeeds, the transmission success rate over the DPDCH increases, and the signaling process success rate increases. However, the signaling process delay prolongs. The smaller the value of this parameter is, the shorter the time is reserved for uplink and downlink synchronization. The NodeB occasionally fails to receive data from UEs using the DPDCH. This decreases the transmission success rate, decreases the signaling process success rate of PPT UEs, but shortens the signaling process delay.

CellUlEquNumCapacity Cell Uplink Capacity of Equal User Number

Meaning: Used to check whether the uplink load is overlarge in a cell. If the uplink load in the cell is greater than this parameter, the uplink load will be judged as overlarge, Otherwise the uplink load will not be judged as overlarge. If the uplink load is not overlarge, and the switch of RTWP anti-interference algorithm is enabled, the RTWP anti-interference algorithm is validated. Admission requests will be accepted even when the RTWP value is great, and related



OLC operations will be cancelled.


Unit: %






Impact on Network Performance: With the RTWP anti-interference switch enabled, if this parameter is set to a small value, the uplink load will be easy to be judged as overlarge. That is, the probability of accepting an admission request becomes low and some OLC actions will be performed. In this case, the cell capacity decreases but the cell load is reduced and the quality of active services improves. If this parameter is set to a



large value, the uplink load will be difficult to be judged as overlarge. That is, the probability of accepting an admission request becomes high and some OLC actions will be cancelled. In this case, cell congestion is easy to happen and the quality of active services cannot be guaranteed.

TermConvUsingHoResThd Called AMR Succesful Rate Threshold Using HO Resources

Meaning: Access success rate threshold for the called party about to process AMR services. When the actual access success rate is lower than this threshold, the called party about to process AMR services can use reserved handover resources.



Unit: %








Impact on Network Performance: If the parameter value is large, it is easy for the called party processing AMR services to use the reserved handover resources. In this case, the AMR admission success rate increases but the incoming handover success rate decreases because the reserved handover resources are used. If the parameter value is small, it is difficult for the called party processing AMR services to use the reserved handover resources and therefore the AMR admission success rate decreases.

MaxERACHUserNum Maximum ERACH user number

Meaning: Maximum number of UEs that can access a cell using the E-RACH function.



Unit: None








Impact on Network Performance: If the parameter value is too large, the possibility of E-RACH congestion increases. If the parameter value is too small, the user access success rate decreases.

FreeuserGbpRsvd Power Resource Reserved for Free Users

Meaning: Power resource reserved for free users. The total guaranteed power for free user groups must not exceed this parameter value.


Unit: None

Actual Value Range: 0~1, Step: 0.01








HsdpaMaxGBPThd Threshold of Maximum Guaranteed Bit Rates for HSDPA

Meaning: Threshold of the maximum guaranteed power for HSDPA users. This threshold limits the power that can be used by HSDPA users. Thus, some power resources are reserved for DCH users to ensure their network access.


Unit: %








Impact on Network Performance: If the parameter value is large, the guaranteed power for HSDPA users is large and the power resource available for DCH users is small, reducing the cell capacity.

HsupaMaxGBPThd Threshold of Maximum Guaranteed Bit Rates for HSUPA

Meaning: Threshold of the maximum guaranteed power for HSUPA users. This threshold limits the power that can be used by HSUPA users. Thus, some power resources are reserved for DCH users to ensure their network access.


Unit: %








Impact on Network Performance: If the parameter value is large, the guaranteed power for HSUPA users is large and the power resource available for DCH users is small, reducing the cell capacity.

NonHPwrForGBPPreemp Non-HSPA Power Threshold for GBP-based Preemption

Meaning: Power threshold for preemption based on the ratio of HS-DSCH Required Power (also called GBP, indicating power required for Guaranteed Bit Rate) between operators. Such preemption can be triggered only when the downlink non-HSPA power in use is smaller than or equal to this threshold in a cell.


Unit: %

Actual Value Range: 0~1, step:0.01








RTRRCCacThdOffset RT Service RRC CAC Power Thd Offset

Meaning: Power threshold offset for RRC connection admission control (CAC) on real-time services. With the strict CAC, the uplink power admission threshold equals RTRRCCacThdOffset plus UlNonCtrlThdForAMR and the downlink power admission threshold equals RTRRCCacThdOffset plus DlConvAMRThd for real-time services. The RNC identifies services as real-time services if the establishment cause in the RRC CONNECTION REQUEST message is one of the following:

1. Originating Conversational Call.

2. Terminating Conversational Call.

3. Originating Streaming Call.

4. Terminating Streaming Call.




Unit: %






Impact on Network Performance: Setting this parameter to an excessively large value allows an excessively large number of real-time services to be admitted, causing failures in RRC admission for non-real-time and other services. Setting this parameter to an excessively small value decreases the RRC admission success rate for real-time services.

NRTRRCCacThdOffset Non-RT Service RRC Power CAC Thd Offset

Meaning: Power threshold offset for RRC CAC on non-real-time services. With the strict CAC, the uplink power admission threshold equals NRTRRCCacThdOffset plus



UlNonCtrlThdForOther and the downlink power admission threshold equals NRTRRCCacThdOffset plus DlOtherThd for non-real-time services. The RNC identifies services as non-real-time services if the establishment cause in the RRC CONNECTION REQUEST message is one of the following:

1. Originating Interactive Call.

2. Originating Background Call.

3. Terminating Interactive Call.

4. Terminating Background Call.

5. Originating High Priority Signaling.

6. Terminating High Priority Signaling.

7. Originating Subscribed traffic Call.


Unit: %








Impact on Network Performance: Setting this parameter to an excessively large value allows an excessively large number of non-real-time services to be admitted, causing failures in RRC admission for real-time and other services. Setting this parameter to an excessively small value decreases the RRC admission success rate of non-real-time services.

OtherRRCCacThdOffset Other Service RRC Power CAC Thd Offset

Meaning: Power threshold offset for RRC call admission control (CAC) on services other than real-time and non-real-time services. With the strict CAC, the uplink power admission threshold equals OtherRRCCacThdOffset plus UlOlcTrigThd and the downlink power admission threshold equals OtherRRCCacThdOffset plus DlOlcTrigThd for the other services. The RNC identifies services as the other services if the establishment cause in the RRC CONNECTION REQUEST message is none of the following:

1. Originating Conversational Call.

2. Terminating Conversational Call.

3. Originating Streaming Call.

4. Terminating Streaming Call.



5. Originating Interactive Call.

6. Originating Background Call.

7. Terminating Interactive Call.

8. Terminating Background Call.

9. Originating High Priority Signaling.

10. Terminating High Priority Signaling.

11. Originating Subscribed traffic Call.


Unit: %





Service Interrupted After Modification: No



(And no impact on the UE in idle mode)

Impact on Network Performance: Setting this parameter to an excessively large value allows an excessively large number of the other services to be admitted, causing failures in RRC admission for real-time and non-real-time services. Setting this parameter to an excessively small value decreases the RRC admission success rate of the other services.

UlIcLdcOptSwitch UL IC LDC Optimized Switch

Meaning: Whether to consider load on delay antenna or load on real-time and delay antenna when setting the uplink power threshold for admission and the LDR threshold.When this switch is turned off, load on delay antenna is considered during the setting of the uplink power threshold for admission and the LDR threshold. When this switch is turned on, load on real-time and delay antenna is considered during the setting of the two thresholds.

GUI Value Range: OFF(OFF), ON(ON)

Unit: None

Actual Value Range: ON, OFF




Recommended Value: OFF(OFF)



Impact on Network Performance: When the difference between the load on the real-time antenna and the load on the delay antenna is small (low IC gains), the effect of this parameter is not apparent. When the difference is large, the effect of this parameter is apparent. When this parameter is set to OFF, the uplink power-based admission requirements become loose and more users are admitted. In this case, system congestion is easy to happen, affecting the quality of active services and system stability. When this parameter is set to ON, the uplink power-based admission requirements become tight and fewer users are admitted. In this case, the quality of active services improves.

DlRRCCeCodeResvSf DL Credit and Code Reserved SF for RRC

Meaning: Threshold for RRC admission based on DL credit and code resources. The value SFOFF indicates that credit resources are not reserved for handover. If the remaining DL resources in a cell are lower than this threshold after a new service is set up, the new service is rejected.

GUI Value Range: SF4(SF4), SF8(SF8), SF16(SF16), SF32(SF32), SF64(SF64),



SF128(SF128), SF256(SF256), SFOFF(SFOFF)

Unit: None






Impact on Network Performance: If the parameter value is large, the RRC admission success rate increases but the performance of UEs involved in handovers is reduced. If the parameter value is small, the RRC admission success rate decreases and the resource utilization is reduced.

UlRRCCeResvSf UL Credit Reserved SF for RRC

Meaning: Threshold for RRC admission based on UL credit resources. The value SFOFF indicates that credit resources are not



reserved for handover. If the remaining UL resources in a cell are lower than this threshold after a new service is set up, the new service is rejected.


Unit: None






Impact on Network Performance: If the parameter value is large, the RRC admission success rate increases but the performance of



UEs involved in handovers is reduced. If the parameter value is small, the RRC admission success rate decreases and the resource utilization is reduced.

BGNOptSwitch Optimal Background Noise Update Switch

Meaning: Whether to activate the optimized background noise algorithm. When this switch is turned on, the RNC first checks whether the ULTotalLoad value is equal to or smaller than the BGNULLoadThd value. If yes, the RNC regards the difference between the current RTWP and the ULTotalLoad value as the current background noise value, which is then considered in the algorithm. When this switch is turned off, the algorithm does not take effect and the original background noise value update algorithm is used. The original background noise value update algorithm starts taking effect when the number of the uplink equivalent UEs in a cell is equal to or smaller than the BGNEqUserNumThd value. The calculation results given by this algorithm may be inaccurate because it takes the uplink cell load into account.

GUI Value Range: OFF(OFF), ON(ON)

Unit: None

Actual Value Range: ON, OFF




Recommended Value: OFF(OFF)




BGNULLoadThd Background Noise Update UL Load Thres

Meaning: Uplink cell load threshold for the optimized background noise algorithm. When BGNOptSwitch is set to ON, the RNC checks whether the ULTotalLoad value is equal to or smaller than the BGNULLoadThd value. If yes, the algorithm uses the difference between the current RTWP and the ULTotalLoad value.


Unit: %






Parameter Relationship: This parameter can take effect only when BGNOptSwitch is set to ON.


Impact on Network Performance: If the parameter value is too small, the conditions of the optimized background noise algorithm are difficult to be met. In this case, background noise cannot be timely updated, affecting the evaluation on the uplink load factor. If the parameter value is too large, the conditions of the optimized background noise algorithm are easy to be met. In this case, background noise is frequently updated but more errors are introduced to background noise if the actual load fluctuates frequently.

Example

Modify the UL handover access threshold of cell 1 to 90%.MOD UCELLCAC: CELLID=1, UlNonCtrlThdForHo=90;

mod ucellcac

Documents

total power threshold

code reserved sf

power of different services

ldr trigger thresholdand

number of different

service transmission

various services

services proportions