  Cloud database is the key technology in cloud computing. The effective and
efficient service quality of the cloud database is inseparable from
communication technology, just as improving communication quality will reduce
the concurrency phenomenon in the ticketing system. In order to visually
observe the impact of communication on the cloud database, we propose a
Communication-Database (C-D) Model with a single-server database over the
quasi-static Rayleigh fading channel, which consists of three parts: CLIENTS
SOURCE, COMMUNICATION SYSTEM and DATABASE SYSTEM. This paper uses the queuing
model, M/G/1//K, to model the whole system. The C-D Model is analyzed in two
cases: nonlinearity and linearity, which correspond to some instances of SISO
and MIMO. The simulation results of average staying time, average number of
transactions and other performance characteristics are basically consistent
with the theoretical results, which verifies the validity of the C-D Model. The
comparison of these experimental results also proves that poor communication
quality does lead to the reduction in the quality of service.
