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Fat AP and Cloud AP V200R010C00 Command Reference

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
location-based-algorithm enable

location-based-algorithm enable

Function

The location-based-algorithm enable command enables the location-based enhanced fast link handover algorithm and sets the moving direction of the vehicle-mounted AP.

The undo location-based-algorithm enable command disables the location-based enhanced link handover algorithm.

By default, the location-based enhanced fast link handover algorithm is disabled and the moving direction of the vehicle-mounted AP is undetermined.

Format

location-based-algorithm enable [ moving-direction { backward | forward | undetermined } ]

undo location-based-algorithm enable

Parameters

Parameter

Description

Value

backward

Configures the vehicle-mounted AP to move from the trackside AP with the largest sequence number to the trackside AP with the smallest sequence number.

-

forward

Configures the vehicle-mounted AP to move from the trackside AP with the smallest sequence number to the trackside AP with the largest sequence number.

-

undetermined

Indicates that the moving direction of the vehicle-mounted AP is undetermined.

If this parameter is specified, the vehicle-mounted AP automatically adjusts its moving direction.

-

Views

Mesh handover profile view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After the location-based enhanced link handover algorithm is enabled, the vehicle-mounted AP will switch the active link to the nearest trackside AP that meets handover requirements.

In vehicle-ground communication scenarios, signals of a trackside AP distant from a train may be temporarily better than the trackside AP near the train due to radio environment changes. If an active link handover occurs at this time, the active link may be incorrectly switched to the distant trackside AP. To prevent incorrect handovers and improve vehicle-ground communication quality, you can use the location-based enhanced link handover algorithm. This algorithm requires that trackside APs be named in ascending or descending order of sequence numbers.

Trackside APs should be named in head-name_sequence-number format. head-name describes track line information and can be different for trackside APs on the same track. It is recommended that you set the same head-name for APs on a track to differentiate tracks. sequence-number of APs along a track must be in descending or ascending order. The sequence numbers of trackside APs can be set with unequal steps. head-name and sequence-number are separated using an underline (_), for example, L1_001, L1_002, L1_005, L1_010.

Moving directions of the vehicle-mounted APs in the front and rear of a train cannot be backward or forward at the same time; otherwise, the location-based link handover algorithm makes incorrect calculations when the train switches its forward direction. For example, if the moving direction of the vehicle-mounted AP in the front is set to forward, the moving direction of the vehicle-mounted AP in the rear must be set to backward.

Example

# Enable the location-based enhanced link handover algorithm and set the moving direction of the vehicle-mounted AP to forward.

<Huawei> system-view
[Huawei] wlan
[Huawei-wlan-view] mesh-handover-profile name huawei
[Huawei-wlan-mesh-handover-huawei] location-based-algorithm enable moving-direction forward
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Updated: 2019-11-21

Document ID: EDOC1100064352

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