• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 56 subscribers
  • Views 490 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

integrity of data packet/transfer using TIMAC or any WSN protocol stack

pratap yenubari
Expert 2305 points

Other Parts Discussed in Thread: TIMAC, CC2520, MSP430F5438A, Z-STACK

Hi,

I am using TIMAC for accelerometer sensor data transfer (adxl322).

I am using msp430f5438a(experimenter board)+cc2520 for node/device

i have a few questions not limited to TIMAC.

1. How to avoid interference /noise at software level?

2.What processing is required to node/device level?

3.How to maintain the integrity of processed data packet?

Thank you

  • 0
    TI__Genius 9325 points

    Hi pratap,

    pratap yenubari said:
    1. How to avoid interference /noise at software level?

    Firstly, you can select the best channel(the most silent channel) out of 16 channels when you start the network. Please see the description on MAC_MlmeScanReq() in "802.15.4 MAC API.pdf" coming with TIMAC installation.
    Secondly, CSMA/CA is implemented in TIMAC and is supposed to be used by default.
    Lastly, you can change the active channel when you encounter severe interference causing a lot of packet loss on the current channel. How to determine the severity, when to switch the channel and how to notify partner devices of the channel switch so that they move to the same new channel altogether are not in the scope of TIMAC. Any proprietary method can be attempted at your own risk. Sorry we have neither any implemented code for frequency agility on top of TIMAC nor guidelines about how to implement. However this is in the scope of ZigBee and implemented in Z-Stack accordingly.

    pratap yenubari said:
    2.What processing is required to node/device level?

    Sorry, I don't get your question.

    pratap yenubari said:
    3.How to maintain the integrity of processed data packet?

    MAC Security provides data integrity and encryption. Please search "Mac Sample Application - Software Design.pdf " and "802.15.4 MAC API.pdf" for the word 'security' for more information.

    - Cetri