Mobilicom ltd. MCU-30 Manual De Usuario
MCU-30 User Manual
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10 Collaborative MESH
– (Collaborative Relay)
In telecommunications, a relay/repeater is an electronic device that receives a signal
and retransmits it at a higher level or higher power, or onto the other side of an
obstruction, so that the signal can cover longer distances.
and retransmits it at a higher level or higher power, or onto the other side of an
obstruction, so that the signal can cover longer distances.
Unlike the description
above,
Mobilicom’s Collaborative MESH does not require special hardware. In a
Mobilicom Collaborative MESH network that is
based on the Mobilicom’s Mobile
MESH network
,
the user needs only to choose the MCU whose data needs to be
relayed (can be one MCU or the entire cluster), and any member of the cluster (even
listener only units) that are within the reception range repeat it on a dedicated time
slots. By that, the network achieves better relay capabilities although the MCUs
listener only units) that are within the reception range repeat it on a dedicated time
slots. By that, the network achieves better relay capabilities although the MCUs
’
locations may changes randomly. The data can be relayed up to 4 times (4 hops). It
can be relayed by the originating MCU or any other MCU that has already received
the data in the previous relay slots. As a result the link is more robust and can reach
longer distances.
can be relayed by the originating MCU or any other MCU that has already received
the data in the previous relay slots. As a result the link is more robust and can reach
longer distances.
As in the Mobile MESH network, the air time is divided into time slots. Each unit has
its own slots in which it transmits data. Every unit which is defined as a relayed unit,
gets specific dedicated relay slots to it. These slots are taken from the allocated
bandwidth of the relayed unit. For this reason, only the relayed unit ha
its own slots in which it transmits data. Every unit which is defined as a relayed unit,
gets specific dedicated relay slots to it. These slots are taken from the allocated
bandwidth of the relayed unit. For this reason, only the relayed unit ha
s “lost” from its
allocated bandwidth for the relay
transmission. The other units’ bandwidth is not
affected this way.
The actual bandwidth of an MCU that is
“marked” as a relayed unit is the allocated
bandwidth (in the Transmission Vector configuration) divided by the Number of Hops.
A Hop represents one portion of the path between source and destination. We can
say that any members of the cluster within a reception range of the current
transmitting MCU is one Hop from this MCU. Other members of the cluster within the
reception range of these MCUs is in 2 Hops from the original MCU and any cluster
member that in the reception range of these units is in 3 Hops from the original MCU
and so on.
say that any members of the cluster within a reception range of the current
transmitting MCU is one Hop from this MCU. Other members of the cluster within the
reception range of these MCUs is in 2 Hops from the original MCU and any cluster
member that in the reception range of these units is in 3 Hops from the original MCU
and so on.
As a Mobile MESH network, the system is synchronized using a GPS or external
1PPS source.
1PPS source.
The configuration is the same as in the Mobile MESH network where All MCUs in the
cluster must have the same configuration (Frequency, Profile and Transmission
Vector) with only one difference - unit ID number. Additional configuration which is
specific to the Collaborative MESH network is the Number of Hops, Max
retransmission
cluster must have the same configuration (Frequency, Profile and Transmission
Vector) with only one difference - unit ID number. Additional configuration which is
specific to the Collaborative MESH network is the Number of Hops, Max
retransmission
and “enabled relay” check box per node in the cluster.
After powering up the MCU, the unit waits for synchronization. As soon as the MCU
is synchronized (regardless to other unit
is synchronized (regardless to other unit
s’ synchronization) it starts to transmit on its
dedicated time slot(s).