Algorithm 2: BA-MPCUBIC: ECN_filter

Initialization:

β = 0.2

received_ACKs = 1

ECN_marked_ACKs = 1

ECN_filter = false

Upon reception of ACK:

if system_current_time < update_time_of_ ECN_filter then

received_ACKs = received_ACKs + 1

if ECN_marked_ACK = true then

ECN_marked_ACKs = ECN_marked_ACKs + 1

end if

else

ECNrate = ECN_marked_ACKs ÷ received_ACKs

update_time_of_ ECN_filter = system_current_time + 1.0 sec

ECN_filter_max_limit = ECNrate + ECNrate × β

ECN_filter_min_limit = ECNrate − ECNrate × β

received_ACKs = 1

ECN_marked_ACKs = 1

ECN_filter = false

for all subflow i do

if SFi == SFcurr then

continue

end if

if ECNrate_SFi > ECN_filter_min_limit and ECNrate_SFi < ECN_filter_max_limit

then

ECN_filter = true

end if

end for

end if

return ECN_filter