Cell discarding strategy to reduce cell error rate in wireless ATM networks

In this paper, we introduce a cell discarding strategy to reduce the number of error cells transmitted on wireless ATM networks. The proposed strategy is based on an `interleaving' method which spreads each bit of a header field over the data field to reduce the cell loss probability. In such method, most burst errors are transformed into single-bit errors in header and the HEC is able to recover it. Intuitively, each corrected cell has a higher probability to contain incorrect payload due to burst errors. When network becomes congested, these dirty cells will be dropped first to reduce the number of error cells received by receiver. The number of retransmitted cells is also reduced. In this paper, the cell payload error probability of a corrected cell is analyzed and the performance of proposed strategy is investigated by simulation. The simulation results show that the proposed strategy substantially improves the cell error rate received by destinations.