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LAUNCHXL-CC26X2R1: Geofence Capabilities in BLE Mesh

Manikanth Chintoju
Intellectual 520 points
Part Number: LAUNCHXL-CC26X2R1

Hi TI,

      What are the geofence capabilities in BLE Mesh ? What are the possible features that can be implemented in the view of geofence. My point is like the mesh node if it goes away from certain virtual fence of our interest then, is there any possiblity that we can actually lock the node automatically even if it is the radio range of mesh not the range of virtual fence of our interest. If so please give some suggestions on how to implement them.

  • 0
    TI__Guru** 101460 points

    Hi,

    I am afraid there is no solution directly baked in the Bluetooth Mesh specifications to address your use case.

    Here are three ideas you may want to consider. I am not sure they will all address your use case, but they could lead you to find a different approach.

    1. You could reduce the Tx Power used by the mobile nodes to limit their range.
      Advantage: very easy to implement.
      Advantage: this will reduce the power consumption of the nodes.
      Inconvenient: an attacker could find a way to amplify the signal and trick the system
    2. You could monitor the RSSI of the nodes and trigger the node removal when you are under the threshold
      Inconvenient: limits of the RSSI to track a node
    3. You could configure the nodes to also broadcast connectionless-AoA PDUs.Then, you could locate the nodes and trigger a node removal whenever a node is out of range.
      Advantage: probably the solution leading to the best range accuracy (but not sure it would actually be relevant)
      Inconvenient: very complex solution

    I hope this will help,

    Best regards,

  • 0 in reply to Clément
    Intellectual 520 points

    Hi Clement,

               In the Approach 2 which you have mentioned RSSI is monitored in which perspective is it from the provisioner or is it w.r.t the neighbour nodes..?

  • 0 in reply to Manikanth Chintoju
    TI__Guru** 101460 points

    Hi,

    Manikanth Chintoju said:
    In the Approach 2 which you have mentioned RSSI is monitored in which perspective is it from the provisioner or is it w.r.t the neighbour nodes..?

    Either options should be possible. It depends on what you want to achieve :)

    Best regards,

  • 0 in reply to Clément
    Intellectual 520 points

    If it is w.r.t neighbourhood nodes then it varies right, multiple nodes find our point of interest node with different RSSI the how can I judge..?

    Sorry, I understood that solution is not straight forward  but I want to just make few points clear .