Title :
Capacity of a wireless LAN with voice and data services
Author :
Zahedi, Ali ; Pahlavan, Kevin
Author_Institution :
Center for Wireless Inf. Network Studies, Worcester Polytech. Inst., MA, USA
fDate :
7/1/2000 12:00:00 AM
Abstract :
The capacity of a carrier sense multiple-access wireless LAN with voice and data services using the TCP/IP protocol is analyzed to obtain a lower bound for the capacity of the wireless networks with voice and data services. The voice traffic is given a higher priority over the data traffic to accommodate the delay requirement for an acceptable quality of service. This is implemented by assigning the TCP protocol for data and the UDP protocol for voice. The relationship between the data throughput and the number of the voice users supported in this environment is analyzed by using a nonpreemptive queuing model. While the analysis in this paper can be applied to any voice encoding system, the improved multiband excitation voice encoding technique is adopted to provide a low transmission rate with an acceptable quality
Keywords :
carrier sense multiple access; channel capacity; delays; integrated voice/data communication; multiuser channels; quality of service; queueing theory; speech coding; telecommunication traffic; transport protocols; wireless LAN; CSMA; QoS; TCP protocol; UDP protocol; capacity analysis; carrier sense multiple-access wireless LAN; data services; data throughput; data traffic; delay requirement; integrated voice-data communications; low transmission rate; lower bound; multiband excitation voice encoding; nonpreemptive queuing model; priority; quality of service; voice encoding system; voice services; voice traffic; voice users; Delay; Encoding; Quality of service; Speech analysis; TCPIP; Telecommunication traffic; Traffic control; Wireless LAN; Wireless application protocol; Wireless networks;
Journal_Title :
Communications, IEEE Transactions on
