How can tweak ARQ parameters in SoftDevice Controller?

[HaoHuang]

Dear all,

I am now using several pairs of nrf52840DK and nrf connect sdk v1.7.1,and using llpm(low latency packet mode) to send data.

In our system,there are four pairs of nrf52840DK sending same packet to elevate reliability,though we might not need the ARQ mechanism or 

in other word,I want to reduce the retransmission times to prevent head of blocking.

Is there any better approach or APIs in SoftDevice controller can do this? 

 

Best regards.

 

[Mttrinh]

Hi,

Can you give more details about you are tying to achieve here? What is your use-case? It is not quite clear what you want to do.

in other word,I want to reduce the retransmission times to prevent head of blocking.

Can you elaborate on what you mean by this?

[HaoHuang]

Sorry for the late reply,

BLE is a reliable protocol, data packets sent by the top-level application will be re-transmitted by the underlying link layer until the peer acknowledges the packet has been receive.

But in our use case,we have several pairs of BLE to send the same data packet and we required the latency within 1ms,the re-transmition will cause head of line blocking and let the latency increase,so we want the BLE just send the packet once,is there any parameters related to this can be tweaked?

thanks,

Best regareds,

Hao