Throughput-delay analysis of frequency hopped NPCSMA in outdoors cellular multipath fading and shadowing channels

In this paper, the probability of packet retransmission is evaluated for SFH-NCFSK in outdoor fading and shadowing channels for macrocell structure at 800/900 MHz. The channel throughput-delay analysis for NPCSMA is evaluated and simulated for outdoor Rayleigh fading and log-normal shadowing channels. The channel throughput-delay characteristics are degraded due to fading and shadowing. A new random multiple access protocol, which combines the advantages of frequency hopping spread spectrum (FH-SS) and carrier sense multiple access (CSMA), is introduced. The system throughput-delay characteristics are analytically derived in noiseless channels and in cellular channels. Monte Carlo simulation is used to verify the analytical results.