Efficient MAC Protocol for Hybrid Wireless Network with Heterogeneous Sensor Nodes

Algorithm 2

Packet transmission algorithm.

(1) Procedure Pkt_Tx

(2)      if (node == omni)

(3)          Pkt.sector = 0

(4)          send Packet to antenna controller

(5)      else

(6)          

(7)          while (nit[].add NOT dest_add)

(8)            

(9)          end while

(10)           sector = nit[].sector

(11)            if (pkt = RTS)

(12)           RTS.sector = sector

(13)           send RTS to antenna controller

(14)           wait CTS_timeout + SIFS

(15)           if (CTS received)

(16)               RTS.sector = 0

(17)               send RTS to antenna controller

(18)           else

(19)               Retransmit

(20)            else if (pkt = CTS)

(21)           CTS.sector = sector

(22)           send CTS to antenna controller

(23)           wait for SIFS time

(24)           CTS.secor = 0

(25)           send CTS to antenna controller

(26)            else

(27)           DATA/ACK.sector = sector

(28)           send DATA/ACK to antenna controller

(29) End