Radwin Ltd. 5XACMOD3C 사용자 설명서
FinM Deployment Guide
Release 4.5.10
3‐9
Inter Base Handover (IBHO) Update Message
Network Guidelines
3.9 Inter Base Handover (IBHO) Update
Message
Message
Fiber in Motion provides L2 connectivity, so all L3 features (routing etc.) are handled directly
between the on‐board router and the wayside core router. The advantage of this mode of
operation is that no routing updates are needed during handovers, facilitating the continuous
fast handovers needed as the train moves along the track.
between the on‐board router and the wayside core router. The advantage of this mode of
operation is that no routing updates are needed during handovers, facilitating the continuous
fast handovers needed as the train moves along the track.
However, there will be other L2 devices (switches) along the wayside network that must be
updated.
updated.
When a TMU moves from one TBS to the next, there must be an update of the wayside
network so the switches know the new data path. This update is made by sending an update
message to the wayside core router. However, we do not wish to send an update message for
each on‐board device, as this will overload the system. For this reason, the update is sent
regarding only 1 device ‐ the MAC address of the on‐board router (since all the on‐board
devices are behind it, they do not need to have individual update messages sent).
network so the switches know the new data path. This update is made by sending an update
message to the wayside core router. However, we do not wish to send an update message for
each on‐board device, as this will overload the system. For this reason, the update is sent
regarding only 1 device ‐ the MAC address of the on‐board router (since all the on‐board
devices are behind it, they do not need to have individual update messages sent).