Algorithm 2: EERS pseudo-code for reference scheduling selection (except sink node).
$Initial:cnt \leftarrow 0,$$SeqN \leftarrow 0$
1.	◼ Upon receiving $Scheduling Message$
2.	$if (Received SeqN>SeqN) Then$
3.	$SeqN \leftarrow Received SeqN$
4.	$for \left(cnt \leftarrow 0 to length\left(RefNodes\right)\right)do$
5.	$if \left(NodeID==RefNodes\left(cnt\right)\right) Then$
6.	$mySchsSlot\leftarrow SchSlots\left(cnt\right);$
7.	$end if$
8.	$if \left(RefNodes\left(cnt\right)==SenderID\right) Then$
9.	$SchSlo{t}_{SrcID}\leftarrow SchSlots\left(cnt\right)$
10.	$end if$
11.	$end for$
12.	$WaitingTime \leftarrow \left( mySchSlot-SchSlo{t}_{SrcID}\right)$
13.	Setup waiting timer $WT\left(WaitingTime\right)$
14.	$end if$
15.	◼ Upon $WT$ expires
16.	$\mathrm{forward}\mathrm{refernces}\mathrm{scheduling}\mathrm{message}$<$RefNodes,$$SchSlots, SeqN$. >