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ADRadioNet Reference Library
  • Wireless Sensor Networks Reference Library
ADRadioNet Reference Library
Documents my endpoint is not acting immediately on CP commands
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    ADRadioNet Reference Library requires membership for participation - click to join
    • Documents
    • ADRadioNet for ADuCRF101
    • ADuCRF101 demodulation principle?
    • ADuCRF101 Shows up as "Unknown Device" in ADRadioNet when i click "Find Devices"
    • advantges and disadvantages between the EV-ADRN-WSN-1Z and EV-ADRN WSN-2Z?
    • Are the devices in the evaluation kit programmed and configured before hand
    • can't find the flash programmer tool in the ADRadioNet package
    • Default configuration settings in the evaluation demo
    • Dose ADI have detailed document for ADradioNet?
    • EVAL-ADF7XXXMB4Z Gerber file
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    • FCC Certification
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    • how can create a graphic in real time with ev adrn wsn 1z ?
    • How can decrease a sleep time, down one second? ADuCRF101MK
    • How can I capture sensor data and use it in my application?
    • how can install ev adrn wsn 1z on windows 10?
    • How can save the data with ev adrn wsn 1z ?
    • How do I expand my network beyond evaluation demo
    • How the payload in ADRadioNet protocol is encoded
    • How to configure the sensor on Bunch WSN?
    • How to Create alternative application to AnodeCP tool?
    • How to decipher the messages on the ANodeCenterPoint tool?
    • How to decode Temperature and humidity value from Bunch sensor board that is seen at AnodeCP GUI?
    • How to recover the setting on EV-ADRN-WSN-1Z
    • How to wake up the EP to capture the active EP data?
    • Identifying sensors enabled and sensors data, from a data packet of End Point in a network
    • Multi-band, Multi-PHY, Multi-channel?
    • my endpoint is not acting immediately on CP commands
    • Node not joining the network after flashing with new firmware
    • port numbers in ADRadioNet?
    • programme microcontroller
    • Prolem with ADuCRF101MK, I don't see the bunch on AnodeCenterPoint
    • Question on data rate selection in router
    • Questions about the ADRadioNet, how to deploy a network?
    • Radio profiles with ADF7024
    • Unable to connect my EndPoint to the ANodeConfig tool.
    • unable to detect BUNCH EP on ANodeConfig tool with ADRadioNet01_EDKv2.0
    • Unable to detect device with ANodeConfig tool
    • Unable to see the node performance of Router
    • What is "Upstream" and "Downstream" in ADRadioNet
    • What's the difference between the WSN development kits EV-ADRN-WSN-1Z and EV-ADRN-WSN-2Z? When and where can they be ordered?
    • Will I loose my configuration settings if the device looses power?
    • WSN Bunch Node PCB Layout File
    • WSN Bunch Node sometimes cannot register

    my endpoint is not acting immediately on CP commands

    Original Question: my endpoint is not acting immediately on CP commands by NagarjunaG

    In my basic ADRadioNet evaluation demo (with CP => R => EP), the commands I sent from the CenterPoint are not immediately reaching the endpoint. Is there something wrong with the way I am sending these commands?. I expect the EP to respond right away without any delay.


    Verified Answer: RE: my endpoint is not acting immediately on CP commands by NagarjunaG

    The commands from the Center Point (CP), using the ANodeCenterPoint tool, are sent to intended End Point (EP) by appending them as a message to the acknowledgement. Please note, the command moves downstream every time the upstream data is received.

     

    Suppose, the EP is operating in an event driven mode with the evaluation demo topology (EP<=>R<=>CP) as shown below.

     

    Consider the command (Command 1) is sent from the CP. This has to first reach the router before it reaches the EP to respond back. The message received from the ANodeCenterPoint tool (at the CP) is intended to be sent to EP. This is first stored in the MSG buffer of the CP device. Whenever the Center Point receives the message from that particular EP via the router (R),  it attaches the command (Command 1) to the acknowledgement and forwards it to the Router (as “ACK 1 + Command 1 to R”), as shown in the flow diagram below. The router now stores this command and waits for the next messages from EP, to attach the command intended for EP to the acknowledgement sent from Router (as “ACK 2 + Command 1 to EP”). In a nut shell, we can see from this example that for every message sent from the CP, the EP can react only after sending 2 messages upstream.

     


    Question: RE: my endpoint is not acting immediately on CP commands by pgovinda

    What is the maximum size of the queue in the Router for storing the downstream messages ?

    does it work like a FIFO or a LIFO as the last command could be the most relevant one ?

    Since AdRadioNET uses stateless routing consecutive packets may not traverse through the same router in which case does the CP retransmit the packet to another Router if Message 2 was received at the CP Via R2.


    Question: RE: my endpoint is not acting immediately on CP commands by NagarjunaG

    Q>> What is the maximum size of the queue in the Router for storing the downstream messages ?

    A>>Currently 3 downstream messages are buffered. The messages are never deleted, they will be over-written. Downstream messages are attached to acknowledgements where appropriate. Each message has an index which in addition to the orbit number and mac address is used to decide when and what message is attached to the acknowledgement.

    Q>> Does it work like a FIFO or a LIFO as the last command could be the most relevant one ?

    A>>In the current implementation, the FIFO model is used for the following reason. If two or three End Points are communicating via the same router with the CP, then FIFO model holds good for reliable delivery of messages.

     

    Q>> Since ADRadioNet uses stateless routing consecutive packets may not traverse through the same router in which case, does the CP re-transmit the packet to another Router if Message 2 was received at the CP via R2.

    A>> I think this question of packets traversing through different routers is asked mainly because you may be thinking of a case where several packets (corresponding to a single message) are sent from CP. This question does not arise, as each of the commands in ADRadioNet constitute of just a single packet. Simple commands like turn on/off lights is an example. The CP transmits this command to first router (say, R1) and clears the memory. As you can see from the flow diagram, for every command from CP, the EP reacts only after sending 2 messages upstream.


    Question: RE: my endpoint is not acting immediately on CP commands by pgovinda

    Thanks. My last question was not related to Fragementation but it is good to know that the protocol doesn't use fragmentation.

    My quesiton was for a case where R1 is not reachable when EP sends Message 2(may be due to change in network conditions) and if another Rotuer R2 on a different downlink channel forwards this message to the CP. As command 1 was buffered at R1 does the CP identify that a different router was used this time and retransmitt Command 1 to R2 or Command 1 will be delivered to EP only when the next timer EP uses R1 for forwarding a message to CP.

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