Optimal Base Station Density for Power Efficiency in
In this paper, we investigate if the downlink transmit power can be decreased arbitrarily by increasing the density of base stations for a given target rate and coverage.
This means that the network capacity linearly increases with the base station density. However, the result can be achieved under a assumption that every cell has saturated traffic. This is unreasonable as the number of base stations increases; some of the small cells do not even have any user to serve.
Consider a downlink cellular network consisting of base stations (BSs) and mobile users (MUs). Many previous studies on cellular networks assumed that BSs are positioned regu-larly. However, in reality, it is not true and there are some random characteristics.
An interesting observation is that the success transmission density increases with the base station density, but the increasing rate diminishes. This means that the number of base stations installed should be more than n-times to increase the network capacity by a factor of n.
In this paper, we use the stochastic geometry approach, where base stations can be modeled as a homogeneous Poisson point process. We also consider the user density, and derive the user outage probability that an arbitrary user is under outage owing to low signal-to-interference-plus-noise ratio or high congestion by multiple users.
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