Abstract—Recently, in bus network each station is connected
to a bus through a switching-hub which establishes a link from a
sending station to a receiving station, so that the number of data
collisions extremely decreased. However, in the case that the
receiving buffer of a receiving station is full or the receiving
station is sending or receiving data, a sending station has to wait
to send data. This waiting time (stand-by time) influences an
efficiency of data transmission. In this paper, a characteristic of
data transmission with priority processing in bus network with
the stand-by time is clarified.
Taking note of one station with two sending buffers for high
priority data and low priority data, the link probability that the
link from the station to a receiving station can be established is
defined as a constant. The station is modeled as a priority queue
with stand-by time, and then in steady state, a balance equation
of the probabilities of the number of waiting data at the ready
time of sending is expressed. From the equations, for each
priority, probabilities of the number of waiting data mean of the
number of waiting data in the sending buffer and mean waiting
time which is the time from the data arrival time at the sending
buffer to the beginning time of sending are derived. The
calculated values are illustrated in several cases, and then the
influences of the stand-by time and the link probability on data
transmission with priority processing are shown.
Index Terms—Bus network, priority, link probability, mean
of the number of waiting data, mean waiting time.
M. Ooki is with the Dept. of Integrated System Engineering, Computer
System Course, Nishinippon Institute of Technology, 1-11 Aratsu,
Kanda-machi, Miyako-gun, Fukuoka, 800-0394 Japan (e-mail:
ooki@nishitech.ac.jp).
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Cite:M. Ooki, "On a Characteristic of Data Transmission with Priority Processing in Bus Network," Journal of Advances in Computer Networks vol. 3, no. 2, pp. 87-92, 2015.
