Capacity of a wireless LAN with voice and data services

The capacity of a carrier sense multiple-access wireless LAN with voice and data services using TCP/IP protocol is analyzed to obtain a lon er bound f or the capacity of the wireless networks with voice and data services. The voice traffic is given higher priority over the data traffic to accommodate the delay requirement for an acceptable quality of service. This is implem ented by assigning the TCP protocol for the data and the UDP protocol for t he voice. The relationship between the data throughput and the number of th e voice users supported in this environment is analyzed by using a nonpreem ptive queuing model. While the analysis in this paper can he applied to any voice encoding system, the improved multiband excitation voice encoding te chnique is adopted to provide a lon transmission rate with an acceptable qu ality.