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A Tractable Approach to Coverage and Rate in Cellular Networks | | Jeffrey G. Andrews
; Francois Baccelli
; Radha Krishna Ganti
; | | Date: |
2 Sep 2010 | | Abstract: | Cellular networks are usually modeled by placing the base stations on a
grid,with mobile users either randomly scattered or placed deterministically.
These models have been used extensively but suffer from being both highly
idealized and not very tractable, so complex system-level simulations are used
to evaluate coverage/outage probability and rate. More tractable models have
long been desirable. We develop new general models for multi-cell SINR using
stochastic geometry. Under very general assumptions, the resulting expressions
for the SINR ccdf (equivalent to the coverage probability) involve quickly
computable integrals, and in some practical special cases can be simplified to
common integrals (e.g., the Q-function) or even to simple closed-form
expressions. We also derive the mean rate, and then the coverage gain (and mean
rate loss) from static frequency reuse. We compare our coverage predictions to
the grid model and an actual base station deployment, and observe that the
proposed model is pessimistic (a lower bound on coverage) whereas the grid
model is optimistic, and that both are about equally accurate. In addition to
being more tractable, the proposed model may better capture the increasingly
opportunistic and dense placement of base stations in future networks. | | Source: | arXiv, 1009.0516 | | Services: | Forum | Review | PDF | Favorites | |
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