Mobilicom ltd. MCU-30L 사용자 설명서
MCU-30 User Manual
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11 Introduction to PTMP (Point-to- Multi-Point)
A PTMP network is a unique topology; it can be achieved by Mobile MESH networks.
It is widely used for multicast/broadcast data distribution from a main unit to many
stations. In this case only one of the stations is controlling the main unit (bi-directional
link) while the other units are only receiving the data.
It is widely used for multicast/broadcast data distribution from a main unit to many
stations. In this case only one of the stations is controlling the main unit (bi-directional
link) while the other units are only receiving the data.
In this network, there is one MCU which is set to be unit ID 1, this unit is the data
distributer, unit with the unit ID 2 is the controller. In this network there are many
“listener” units which are defined by different unit IDs. The transmission vector includes
3 units when the 3rd
distributer, unit with the unit ID 2 is the controller. In this network there are many
“listener” units which are defined by different unit IDs. The transmission vector includes
3 units when the 3rd
unit members’ bandwidth allocation is set to 0.
In cases where a handoff of the controller position is needed (between other "listener"
members), the transmission vector will be set to 2 units. All the “listener” units will be
configured with unit ID 2 as well. The TX power of unit 1 and 2 (controller) should be
set to maximum (23dBm) and
members), the transmission vector will be set to 2 units. All the “listener” units will be
configured with unit ID 2 as well. The TX power of unit 1 and 2 (controller) should be
set to maximum (23dBm) and
the other “listener” units’ TX power should be set to
minimum (-40dBm). The handoff procedure should be done in the following steps:
1. TX power of the current controller should be set to minimum (-40dBm)
2. TX power of the new controller should be set to maximum (23dBm)
NOTE –“listener” MCU cannot be monitored over the air and isn’t present in
link monitor.
link monitor.