Non-SHO Area
4.11 WRFD-15020102 Macro & Micro Joint Inter-frequency Handover (New/Optional)
4.11.1 Feature Description
On a macro multi-carrier network where some macro cells have intra-frequency neighboring micro cells, this feature is used to check whether there are UEs in connected mode setting up HSUPA or HSDPA services in problem areas. The RNC checks the signal quality difference between the macro and micro cells reported from the UE. If a UE is detected in problem areas, it is blindly redirected to an inter-frequency macro cell that has no intra-inter-frequency neighboring micro cells. In this way, this feature protects UEs from call drops or throughput drops caused by the difference between the uplink boundary and the downlink boundary for the macro and micro cells, thereby minimizing the uplink interference in the micro cell.
4.11.2 System Capacity and Network Performance
System Capacity
For details, see section 4.9.2 "System Capacity and Network Performance (for Scenarios Where Some Cells Operate at the Same Frequency Band)."
Network Performance
For details, see section 4.9.2 "System Capacity and Network Performance (for Scenarios Where Some Cells Operate at the Same Frequency Band)."
4.11.3 NEs
This feature is implemented on the RNC, NodeB, M2000, and CME.
4.11.4 Hardware
No impact.
4.11.5 Inter-NE Interface
No impact.
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4.11.6 Operation and Maintenance
License
A new license item has been introduced on the RNC to control this feature at the cell level.
Feature ID Feature Name License Control Item NE Sales Unit
WRFD-150201 WRFD-150201 Macro &
Micro Co-carrier Uplink Interference Control
Macro & Micro Co-carrier Uplink Interference Control (Per Cell)
RNC per cell
Configuration Management
The following table lists the parameter that has been added on the RNC for this feature.
Change Type
Parameter ID MML Command Description
New HoSwitch1:HO_CO
Specifies whether the sub-feature Macro & Micro Joint Inter-frequency Handover is enabled. When this parameter is set to ON, the sub-feature is enabled. When this parameter is set to OFF, the sub-feature is disabled.
This feature checks whether UEs are located in problem areas of intra-frequency networks with macro and micro cells. Then, the feature instructs these UEs to move to other cells through blind inter-frequency handovers.
New ReportIntervalfor1 APre
SET/LST UHOCOMM Specifies the interval between the reports that are triggered by event 1A' in macro-micro problem areas.
New MacroMicro1APre MeasSwitch
SET/LST UHOCOMM ADD/RMV/MOD/LST UCELLHOCOMM
Specifies whether to send the event 1A' measurement control message. If the parameter is set to ON, the RNC sends the event 1A' measurement control message to identify users in the macro-micro problem areas 1A'-1A. If the parameter is set to OFF, the RNC does not send the event 1A' measurement control message.
When a user whose best cell is the macro cell moves to an area near to the micro cell and its link to the micro cell has not been added to the active set, the user causes large interference to the micro cell in the uplink. This type of area is referred to as the macro-micro problem area and event 1A' is added to
Draft A (2013-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
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Type
Parameter ID MML Command Description
identify this type of users.
Event 1A' is reported when a user moves to the macro-micro problem area and ReportIntervalfor1APre specifies the interval of periodic reports. Events 1A and 1APre have the same
measurement reports and their only difference lies in measurement IDs.
That is, the RNC differentiates between event 1A and event 1A' only by the measurement ID.
When the Micro Cell Dynamic Rx Sensitivity Control feature is enabled in the micro cell, the event 1APre
threshold is the value of
Total2PartDesenseDiff in the ADD UCELLDESENSE command.
Otherwise, the event 1A' threshold is equal to the global desensitization intensity.
New MicroCellFlag ADD/RMV/MOD/LST UCELLDESENSE
Specifies whether the current cell is a micro cell. If this parameter is set to True, the current cell is a micro cell.
Otherwise, the current cell is a macro cell.
New Macro2MicroUlDiff ADD/RMV/MOD/LST UCELLDESENSE
Specifies the uplink receiving capacity different between the macro cell and micro cell. The value of this parameter depends on the number of antennas in the macro and micro cells and tower mounted amplifier (TMA). This
parameter is set to 3 dB in the following conditions:
The macro cell uses four antennas.
The micro cell uses two antennas.
The micro cell uses two antennas.
New Total2PartDesense Diff
ADD/RMV/MOD/LST UCELLDESENSE
Specifies the difference between global desensitization intensity and partial desensitization intensity of a micro cell.
Partial desensitization intensity = Full desensitization intensity –
Total2PartDesenseDiff
Performance Management
This feature has an impact on the following RNC counters:
Draft A (2013-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
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Unit
Description
New VS.HHO.AttInterFreqOut.PS.
CoMacroMicro
HHO.Cell Specifies the number of outgoing macro & micro joint inter-frequency handover attempts in PS domain for cell.
New VS.HHO.SuccInterFreqOut.P S.CoMacroMicro
HHO.Cell Specifies the number of successful outgoing macro &
micro joint inter-frequency handovers in PS domain for cell.
This feature has no impact on the NodeB counters.
Fault Management
No impact.
4.11.7 Impact on Other Features
Prerequisite Features
This feature depends on the following features:
WRFD-020110 Multi Frequency Band Networking Management
WRFD-150201 Macro & Micro Co-carrier Uplink Interference Control
Mutually Exclusive Features
None
Impacted Features
None