How can tweak ARQ parameters in SoftDevice Controller?

RE: How can tweak ARQ parameters in SoftDevice Controller?

HaoHuang — Wed, 04 May 2022 10:48:04 GMT

Got it, thanks!

RE: How can tweak ARQ parameters in SoftDevice Controller?

Mttrinh — Wed, 04 May 2022 10:44:23 GMT

Hi,

All packets transmitted over a BLE link will be retried infinitely or until link loss, and all packets are protected by a CRC on the link layer. There is no way to tweak this, or set a maximum number of retransmits. The only thing you can possibly do is to adjust the supervision timeout, so that less data is tried transmitted before the link is considered lost.

RE: How can tweak ARQ parameters in SoftDevice Controller?

HaoHuang — Tue, 03 May 2022 03:36:44 GMT

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

RE: How can tweak ARQ parameters in SoftDevice Controller?

Mttrinh — Tue, 08 Mar 2022 13:03:54 GMT

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.

[quote user=""]in other word,I want to reduce the retransmission times to prevent head of blocking.[/quote]

Can you elaborate on what you mean by this?