If more than one Gateway is in communication range with the device, the
network server sends join acceptance message via the gateway which is
closest to end device based on received RSSI vale of a gateway.
Once accepted the tag will stay joined for a period of up to 6months before
reinitiating a Join Request, so long as network service is not interrupted.
The Sense Locate Position is configured to receive acknowledgment from
the Network Server for each beacon transmitted. This acknowledgment is
sent from the gateway and is used to validate that the device is still joined to
the network and that the communication link has not failed.
When a device fails to receive an acknowledgment for the transmitted
beacon, it assumes that the communication between the device and the
network has failed. If device fails to receive acknowledgement for three
consecutive beacons at either ABR, DBR or MAB it will reinitiate the join
request process. While in the re-joining process GNSS module is disabled.
If a device is unable to join a network, it re-attempt a join request at the next
beacon.
Payload acknowledgements are used purely to monitor and determine
devices join status. If a beacon is not acknowledged the device will not
resend the beacon, this is to avoid excessive network traffic.
A device will remain connected with a network server after the join process
is completed regardless of whether an alternative Network Server becomes
available with a better communication link.
A network server can use multiple gateways, in this scenario the device
should roam seamlessly between gateways as long as they all push data to
the same network server.
V21220SLP
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