In this paper two protocols integrating voice and data on a token bus
LAN are proposed. These protocols use the access mechanism of the Toke
n Bus protocol, but in addition the token bypasses idle stations, expl
oiting the periodicity of voice. The priority scheme of the Token Bus
is used to separate voice traffic from data traffic. Voice packets are
assigned to the higher priority while data packets and the voice call
packets for setting up calls are assigned to the lower priority. The
proposed protocols were studied via simulation tools. The simulation r
esults show that these protocols satisfy the delay constraint of voice
traffic, and at the same time, guarantee a sufficient bandwidth for d
ata traffic. Results obtained under various traffic conditions are giv
en.