An Efficient Anycast Mechanism for 802.15.4-TSCH to Improve QoS in IIoT

Algorithm 3

Scheduling process in the proposed method.

1:  Inputs:

     routesList: List of all routes to root, respectively

2:  Outputs:

     MX: 2D scheduling matrix

3:  for route ∈ routeList do

4:    slot ← getFirstAvailableTimeSlot(MX) ⊳ allocation of the first timeslot

5:    forhop ∈ routedo

6:      slot++

7:     whileslot < slotFrameLengthdo

8:       iftimeSlotCollision(hop, slot) then

          ⊳ Checks whether there is an collision in timeslot or not

9:         slot++

10:        continue

11:      else

         ⊳ Return available channeloffset for hop(sender, receiver) in timeslot slot

12:        channel ← getChannelOffSetAvailable(hop, slot)

13:        ifchannelthen

            ⊳ set hop(sender, receiver) in timeslot slot and channeloffset channel

14:          setMX(hop, slot,channel)

15:        else

16:          slot++

17:         continue

18:        end if

19:      end if

20:     end while

21:   end for

22: End for

23: ReturnMX