  This paper considers a joint transmission scheme (JT) developed for cloud
radio access networks (C-RANs). This proposed scheme features cooperative sets
of remote radio heads (RRH) defined in a disk around each user location. The
nodes belonging to each of these sets perform a weighted maximum ratio
transmission to jointly serve the user. The powers allocated to the beamformers
are computed at the network baseband unit, taking into account channel gains,
as well an equity criterion between the users. In comparison with the existing
literature, our model includes a saturation assumption, with all transmissions
taking place over the same resource block. A RRH belonging to multiple sets can
hence transmit to several users simultaneously. The distributions of the
network coverage and spectral efficiency are calculated by means of stochastic
geometry (SG), and compared with Monte Carlo simulations. The derived
expressions take into account the power allocation, the user and RRH densities,
as well as the statistical correlation resulting from the set overlaps.
