The coordinator and any router-capable Jennic device internally store various statistics about each “neighbor” child node that include the RF link quality, and numbers of message packets that are sent, received, and lost. For router nodes, these same statistics are stored on the device’s single parent node. Devices that are “end devices” do not store any of this data.
In the JACE’s Niagara station, this statistical data is modeled as “Pan Info” in dynamic components using a “neighbor entry structure”.
The SedonaJen6lpNetwork contains a childPanInfo component with an entry for each child.
Each Sedona6lpDevice contains a parentPanInfo entry for its parent, plus a childPanInfo component for each of its children (if any).
Properties in this neighbor entry structure are as follows:
Is Sleeping End Device — Whether device is a (hibernating) end device type (true
) or a continuously powered device (false
).
Link Quality — Value between 0-255, representing strength of last packet received from this node. Values over 60 represent a good link. Also known as “LQI” (Link Quality Index).
Packets Lost — Number of packets sent to device for which an ack(nowledgement) was not received. Note an ack is not expected on all packets.
Packets Sent — Number of packets sent to device.
Packets Received — Number of packets received from device.
Mac154 — The unique 802.15.4 MAC address of the device, in hexadecimal notation without leading zeroes, for example: 158d00:9b017
Stale — Typically false, else true if this node entry is stale, meaning the device represented is no longer a child. For example, if a device resets and rejoins the JenNet network, it may have a new parent (say a router node). In this case, this Stale values shows true.
The Pan Sheet view of the SedonaJen6lpNetwork exposes most of this PAN info, along with a graphical representation of the node hierarchy in the JenNet tree for all connected nodes. For related details, see Using the Pan Sheet.
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