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CC1312R: SimpleLink sub-GHz Limitations, FOTA

Peter Naylor2
Prodigy 20 points
Part Number: CC1312R
Other Parts Discussed in Thread: TIDC-01002, TIDEP0084, MSP-EXP432E401Y

Our requirements:
- 32kB package, asynchronous, sent every 6 hours
- sub-GHz tech (long range)
- FOTA is a must

Questions:
1. There seems to be a "1% Duty Cycle" limitation for the 868MHz band in the EU. Does that apply to SimpleLink?
2. What is the maximum amount data (kB) we could send per day?
3. The ALOHA method seems to lead to a 'lossy' network, around 18% efficiency. Does SimpleLink have the same network efficiency?
4. Does the CC1312R / SimpleLink support firmware over-the-air updates? (FOTA)

Thank you! 

  • 0
    TI__Mastermind 36385 points

    Peter, 

    Questions:
    1. There seems to be a "1% Duty Cycle" limitation for the 868MHz band in the EU. Does that apply to SimpleLink?

    • the 1% duty cycle applied if your system does not implement "Listen-before-talk", ours does,therefore if you select TI-15.4Stack the 1% duty does not apply.

    2. What is the maximum amount data (kB) we could send per day?

    • The long range mode that we support is 5kbps over the air. Lets assume 50% overhead due to how the packetization is done. Then lets assume you can get 50% max thru-put.... just estimating here.... 1.25kbps of actual data throughput continuously. This adds up to 12 MB of data per day.

    3. The ALOHA method seems to lead to a 'lossy' network, around 18% efficiency. Does SimpleLink have the same network efficiency?

    • We use Listen-before-talk. We can get close to 50% usage, but I like to stay with 25% just to be on the safe size.

    4. Does the CC1312R / SimpleLink support firmware over-the-air updates? (FOTA)

    • Yes.

    Regards,
    /TA

  • 0 in reply to TA12012
    Prodigy 20 points

    Hi TA,

    Thank you much for the quick and thorough response.  This is good news for us.  A couple of follow-up questions that are slightly off-topic from the post subject:

    1. Are there 'off the shelf' gateways available for use with the CC1312R end-nodes?  Or do we have to develop our own gateway (e.g. TIDC-01002, TIDEP0084, MSP-EXP432E401Y)?
    2. Are there any cellular-backhaul options for the sub-GHz gateways?
    3. Would we have to RF-certify our product with each region we deploy to?  E.g. FCC, CE, RCM, CCC, JTEC etc.
    4. How does end-node provisioning work for the SimpleLink products (registration/authentication/deviceID for our web application, FOTA)?  Maybe you can reference a document for me and I can read up myself ;)

    Best,

    Peter

  • 0 in reply to Peter Naylor2
    TI__Mastermind 36385 points

    Peter,

    1.Are there 'off the shelf' gateways available for use with the CC1312R end-nodes?  Or do we have to develop our own gateway (e.g. TIDC-01002, TIDEP0084, MSP-EXP432E401Y)?

    • Not to my knowledge. This is something we hope to change, but as of now, nothing is available.

    2.Are there any cellular-backhaul options for the sub-GHz gateways?

    • Not to my knowledge.

    3.Would we have to RF-certify our product with each region we deploy to?  E.g. FCC, CE, RCM, CCC, JTEC etc.

    • Yes

    4.How does end-node provisioning work for the SimpleLink products (registration/authentication/deviceID for our web application, FOTA)?  Maybe you can reference a document for me and I can read up myself ;)

    • The version that is released today required "pre-shared keys", but we are working on a version that will including formal key-exchange methods.

    Regards,
    /TA