Multicast for permanent Class C device #1535
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I have a device which permanently runs in class C. It joins the network using OTAA and I can successfully schedule unicast downlinks. Now I would like to schedule multicast downlinks (and later also fragements / fuota) and I came across some points:
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From the Remote Multicast Setup specification the multicast group setup and multicast session setup commands are almost independent.
My recommendation would be to change your end-device application to use the With these changes your end-device will behave as expected by a standard FUOTA server. |
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From the Remote Multicast Setup specification the multicast group setup and multicast session setup commands are almost independent.
The
McGroupSetupReq/Ans
commands create the multicast group (cryptographic context). This command can be used stand alone.The
McClassBSessionReq/Ans
andMcClassCSessionReq/Ans
commands can only be used if a previous multicast group was setup.Please note that the clock synchronization can be achieved by using the
DeviceTimeReq
MAC command instead of the "Application Layer Clock Synchronization" specification. In addition the use of the MAC command will provide…