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Implementing BLE Star-Bus Network Topology

Selly Soon
Prodigy 20 points
Other Parts Discussed in Thread: CC2540, CC2564, CC2560

Hi,

I gathered from SIG's website BLE technical factsheet that BLE is able to support unlimited nodes via a Star-Bus Network Topology. Few questions:

1) What is the max active/silent nodes per 'Star' cluster and the max no of nodes that can communicate on the Star-bus at any one time. Any documentations available for the BLE star-bus network topology that I can reference?

2) Which of the chipset(s) supports this topology... CC2540, CC2564 or CC2560. Please advise if it is one or more of the listed chipsets or if there are any other components which I may have missed out?

3) Given that this network topology is a published capability for BLE, are there TI template solutions (source codes, etc) for the implemention of a Star-Bus Network Topology via the chips in Question 2).

4) If there are no template solutions in question 3), how can I go about implementing this network topology via the chips in question 2)? 

Please advise.

Thanks and Regards,

Selly

  • 0
    TI__Genius 17975 points

    Event though the BLE standard allows a central device to connect to multiple peripheral devices, v1.0 of the CC2540 BLE stack does not currently support multiple connections for central devices.

  • 0 in reply to Willis1
    Prodigy 20 points

    Hi Willis,

    Thanks for the info on the current limitations in v1.0. However, I would still like to know how the BLE star-bus topology would be implemented in the final version as advertised. Meaning:

    1) What combination of chips (CC2540, CC2560, CC2564, etc) are needed to implement the star-bus network? i.e Only CC2540 is needed or must it be paired with CC2560/2564, etc 

    2) Would the BLE star-bus network topology be a generic BLE stack made available to all users via the chipsets or would users need to engage third party vendors like MindTree to code it?

    3) In terms of communication protocols and power consumption of the central device/end nodes, how different is this BLE star-bus topology from Classic Bluetooth piconet and scatternet topologies? Any reference documents from TI on the BLE star-bus network topology?

    Please advise on the the above technicalities

    Given the current limitations in v1.0, it would also be helpful to provide an indicative timeline on when the BLE star-bus network topology would be rolled out for my project forward planning

    Thanks and Regds,

    Selly

  • 0 in reply to Selly Soon
    Expert 1890 points

    You should check this thread: http://e2e.ti.com/support/low_power_rf/f/538/t/88642.aspx

    Karl added some info about cc2564 but it's not too much - I also wait for more details and timeline of that chip ...

    regards,

    B.