Mobilicom ltd. MCU-30 ユーザーズマニュアル
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 vecto
"listener" members), the transmission vecto
r 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
(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:
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.