Prioritizing Inter-Frequency Handover Over Intra-Frequency Handover in LTE

4G LTE
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1

Hello All.

How can we prioritize inter-frequency handover (from a low band to a high band) over intra-frequency handover in LTE?

Prioritizing Inter-Frequency Handover Over Intra-Frequency Handover in LTE
Prioritizing Inter-Frequency Handover Over Intra-Frequency Handover in LTE1024×1024 178 KB

2

Vendor?

  • In Ericsson, try the Inter-Frequency Handover to Higher Priority feature.

  • In Huawei, use the Frequency Priority-Based Handover feature.

3

To prioritize inter-frequency handover (low band to high band) over intra-frequency handover in LTE, you can adjust the following parameters:

Key Solutions

  1. Increase Inter-Frequency Handover (IFHO) Priority
  • Set a higher priority for high-band frequencies (L1800) compared to the low-band (L900).
  • Parameter Example: EUTRANINTERNFREQ → L1800 (Priority = 7), L900 (Priority = 5).
  1. Adjust A5 Event Handover Thresholds
  • Lower the A5-1 threshold (serving cell RSRP) so UEs leave L900 earlier.
  • Raise the A5-2 threshold (neighbor cell RSRP) so UEs enter L1800 sooner.
  • Parameter Example:
    • A5-1 threshold (L900) = -110 dBm
    • A5-2 threshold (L1800) = -105 dBm
  1. Modify CIO (Cell Individual Offset) Values
  • Increase CIO for L1800 to encourage earlier entry.
  • Decrease CIO for L900 to discourage camping.
  • Parameter Example:
    • CIO_L1800 = +3 dB
    • CIO_L900 = -3 dB
  1. Optimize S-IntraSearch and S-NonIntraSearch Parameters
  • Increase S-IntraSearch to delay intra-frequency handovers.
  • Decrease S-NonIntraSearch to accelerate inter-frequency handovers.
  • Parameter Example:
    • S-IntraSearch (L1800) = -90 dBm
    • S-NonIntraSearch (L900) = -105 dBm
  1. Reduce Intra-Frequency Handover Margin
  • Decrease the intra-frequency handover margin so UEs are not easily handed over within the same frequency.
  • Parameter Example:
    • HO Margin Intra-Freq = 1 dB (default is usually 3 dB)
  1. Adjust Load Balancing Settings
  • Use Inter-Frequency Load Balancing to push traffic to L1800 when capacity allows.
  • Parameter Example:
    • LoadThresholdLowBand = 80%
    • LoadThresholdHighBand = 50%
  1. Ensure Adequate Coverage on High Band
  • If L1800 coverage is weak, users will not move from L900. Optimize tilt, power, and antenna configuration.
  • Parameter Example:
    • RSRP_L1800 > -95 dBm
4

dInter-frequency handover is prioritized over intra-frequency in LTE to avoid congestion and optimize spectrum usage. It helps balance network load and improve user experience.

6

I couldn’t find the Huawei feature.

Did you mean some type of MLB?

7

It’s type of handover.

Check the handover description document in HedEx.