Table 2 Summary of adopted simulation parameters related to the SON algorithms and baseline

P_SON

Periodicity of SON algorithm execution

1 sec

P_LTE / P_WLAN

Periodicity of load calculation

1 sec

α

Load filtering factor (“forgetting factor”)

0.8

micro_range_extension

Static offset added to RSRP measurements from micro cells

6 dBm

{WLAN_LL, WLAN_LH} for CSR

WLAN load thresholds used in threshold updating algorithm

{70 %, 85 %}

{WLAN_LL, WLAN_LH} for RU

WLAN load thresholds used in threshold updating algorithm

{60 %, 80 %}

RSS_Step

Step size of RSS threshold adjustments (up or down)

1 dBm

RSS_Initial

Initial value of the RSS threshold

–82 dBm

{RSS_Min, RSS_Max}

Minimum and maximum values of the RSS threshold

{–86 dBm, –45 dBm}

{LTE_LL, LTE_LH} for CSR

LTE load thresholds used in threshold updating algorithm

{70 %, 85 %}

{LTE_LL, LTE_LH} for RU

LTE load thresholds used in threshold updating algorithm

{60 %, 80 %}

RSRP_Step

Step size of RSRP threshold adjustments (up or down)

1 dBm

RSRP_Initial

Initial value of the RSRP threshold

–70 dBm

{RSRP_Min, RSRP_Max}

Minimum and maximum values of the RSRP threshold

{–110 dBm, –40 dBm}

Reference Throughput

Reference throughput for the CSR calculation

12 Mbps unless differently specified

{RSS_ThrPen, RSRP_ThrPen}

Threshold penalty used in SON algorithms with variable step size

10 dBm

{RSS_FbThr, RSRP_FbThr}

Threshold fallback used in SON algorithms with variable step size

–20 dBm