Abstract-This paper presents a tractable model for analyzing non-coherent joint transmission base station (BS) cooperation, taking into account the irregular BS deployment typically encountered in practice. Besides cellular-network specific aspects such as BS density, channel fading, average path loss and interference, the model also captures relevant cooperation mechanisms including user-centric BS clustering and channel-dependent cooperation activation. The locations of all BSs are modeled by a Poisson point process. Using tools from stochastic geometry, the signal-to-interference-plus-noise ratio (SINR) distribution with cooperation is precisely characterized in a generality-preserving form. The result is then applied to practical design problems of recent interest. We find that increasing the network-wide BS density improves the SINR, while the gains increase with the path loss exponent. For pilot-based channel estimation, the average spectral efficiency saturates at cluster sizes of around 7 BSs for typical values, irrespective of backhaul quality. Finally, it is shown that intra-cluster frequency reuse is favorable in moderately loaded cells with generous cooperation activation, while intracluster coordinated scheduling may be better in lightly loaded cells with conservative cooperation activation.
Coherent joint-transmission with power-splitting with and without additional dirty paper coding was considered. REF presented a general model for analyzing non-coherent joint-transmission BS cooperation, and characterized SINR distribution under user-centric clustering and channel dependent scheduling.
A Tractable Model for Non-Coherent Joint-Transmission Base Station Cooperation
ArXiv
ArXiv
Mathematics Computer Science