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A need for real-time
data transmission to forklifts and Autonomous Guided
Vehicles (AGVs) in factories has been increasing
. Local Area Radio Network (LARN) can fulfill this
need. In factory environment, however, there are
many machines wich obstruct the radio wave propagation.
This paper proposes
CEllular Area Radio Network (CELARN), which has
good transmission performance in such factory environment.
CELARN consists of some radio network and a wired
network which integrates the radio networks. The
base stations are connected to one another by the
wired network in a logical ring. A data-frame makes
the rounds of the base stations to transmit data.
Moreover, the data-frame behaves as a token of the
common radio control channel to prevent collisions.
The transmission performance of the CELARN was analyzed
for its application to car manufacturing factories.
The analysis shows that the CELARN has good transmission
delay performance even in such inferior environment.
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