5.1 Intra-RAT Handover
5.1.1 Handover Algorithm Switch
5.1.1.1 IntraFreqCoverHoSwitch (Coverage-Based Intra-Freq HO Algo Switch)
Description
Meaning: This parameter indicates whether the coverage-based intra-frequency handover algorithm is enabled. This parameter is used to control seamless coverage between intra-frequency cells.
Value type: enumeration Value range: ON, OFF Adjustment step: N/A Unit: none
Default value: ON
Parameter relationship: none Impact scope: eNodeB Scenario-based parameter: no
Setting
Recommended value: ON
If this parameter is set to ON, UEs can be handed over to an intra-frequency neighboring cell.
If this parameter is set to OFF, UEs cannot be handed over to an intra-frequency neighboring cell.
Impact of parameter setting on network performance: If this parameter is set to ON, seamless coverage between intra-frequency cells is guaranteed and user experience improves. If this parameter is set to OFF, seamless coverage between intra-frequency cells cannot be guaranteed.
Related Commands
LST ENODEBALGOSWITCH
MOD ENODEBALGOSWITCH: HoAlgoSwich=IntraFreqCoverHoSwitch-1;
5.1.1.2 InterFreqCoverHoSwitch (Coverage-Based Inter-Freq HO Algo Switch)
Description
Meaning: This parameter indicates whether the coverage-based inter-frequency handover algorithm is enabled. This parameter is used to control seamless coverage between inter-frequency cells.
Value type: enumeration Value range: ON, OFF Adjustment step: N/A Unit: none
Default value: ON
Parameter relationship: none Impact scope: eNodeB
Setting
Recommended value: ON
If this parameter is set to ON, UEs can be handed over to an inter-frequency neighboring cell.
If this parameter is set to OFF, UEs cannot be handed over to an inter-frequency neighboring cell.
Impact of parameter setting on network performance: If this parameter is set to ON, seamless coverage between inter-frequency cells is guaranteed and user experience improves. If this parameter is set to OFF, seamless coverage between inter-frequency cells cannot be guaranteed.
Related Commands
LST ENODEBALGOSWITCH
MOD ENODEBALGOSWITCH: HoAlgoSwich=InterFreqCoverHoSwitch-1;
5.1.1.3 BlindHoSwitch (Blind HO Switch)
Description
Meaning: This parameter indicates whether the blind handover algorithm is enabled.
Value type: enumeration Value range: ON, OFF Adjustment step: N/A
Unit: none
Default value: OFF
Parameter relationship: none Impact scope: eNodeB Scenario-based parameter: no
Setting
Recommended value: OFF
A blind handover is triggered when there is not enough time for GAP measurement. If this parameter is set to ON, a UE skips GAP measurement and selects the cell with the highest priority from the neighboring cell list. However, the handover success rate cannot be guaranteed. If this parameter is set to OFF, a UE can be handed over only after the eNodeB receives the measurement report from the UE and determines that the condition for a handover is met.
Parameter adjustment scenario: Set this parameter to ON when there is not enough time for GAP measurement and no requirement for the handover success rate.
Impact of parameter setting on network performance: If this parameter is set to ON, handovers are performed in a timely manner, but the handover success rate may be compromised.
Related Commands
LST ENODEBALGOSWITCH:;
MOD ENODEBALGOSWITCH: HoModeSwitch=BlindHoSwitch-1;
5.1.1.4 FreqPriorIFHOSwitch (Based on Frequency Priority HO Switch)
Description
Meaning: This parameter indicates the frequency-priority-based inter-frequency handover switch.
Value type: enumeration Value range: ON, OFF Adjustment step: N/A Unit: none
Default value: OFF
Parameter relationship: none Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: OFF
This parameter applies only to handovers between inter-frequency co-coverage cells when one frequency is preferred for carrying services of UEs handed over from low-priority frequencies.
If this parameter is set to ON, an inter-frequency handover based on frequency priorities will be triggered even when the signal quality of the serving cell is good. If this parameter is set to OFF, inter-frequency handovers based on frequency priorities are disabled.
Impact of parameter setting on network performance: If this parameter is set to ON, a UE is handed over to another frequency based on frequency priorities. In this case, the number of handovers increases, but the UE data rate also increases.
Related Commands
LST CELLALGOSWITCH:;
MOD CELLALGOSWITCH: FreqPriorityHoSwitch=FreqPriorIFHOSwitch-1
5.1.1.5 FreqPriorityIFBlindHoSwitch (Frequency Priority-Based Blind HO Switch)
Description
Meaning: This parameter indicates whether the handover based on the frequency priority is blind.
Value type: enumeration Value range: ON, OFF Adjustment step: N/A Unit: none
Default value: ON
Parameter relationship: This parameter is valid only when FreqPriorIFHOSwitch is set to ON.
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: ON
If this parameter is set to ON, the handover based on the frequency priority is blind. If this parameter is set to OFF, the handover based on the frequency priority requires GAP measurement.
A blind handover is triggered when there is not enough time for GAP measurement. If this parameter is set to ON, a UE skips GAP measurement and selects the cell with the highest priority from the neighboring cell list. However, the handover success rate cannot be guaranteed. If this parameter is set to OFF, a UE can be handed over only after the eNodeB receives the measurement report from the UE and determines that the condition for a handover is met.
Set this parameter to ON if fast handover is required. In addition, set a high threshold for event A1 to guarantee the handover success rate. This reduces the number of UEs to be handed over to high priority cells and increases the probability for low priority cells to be heavily loaded.
Related Commands
LST CELLALGOSWITCH:;
MOD CELLALGOSWITCH: FreqPriorityHoSwitch=FreqPriorIFBlindHOSwitch-1;