Sp calculation

Section 10.1.1

I have a question about the Sp computation. Looks like the Sp value needs to be between 1 and 9. In my view, the recommended method (3*ETX)-2 yields values between 1 and 10. This needs to be fixed.

This is how I see it.

On a very high quality link, if there are no retransmissions required ETX will be 1/1 => 1. Sp will be (3*1)-2 => 1

On a very poor quality link where the packet only gets through after the full 3 retries ETX will be 4/1 => 4. Sp will be (3*4)-2 => 10.

Is my calculation correct?

TW> I'll let Pascal and Xavi comment.

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