How much do we benefit from cooperation between pairs of neighboring base stations?

Thursday, November 08, 2012

In the current work we deal with the problem of base station cooperation in the downlink of infinite wireless cellular networks. The positions of base stations are modeled by a Poisson point process. Each base station can choose to cooperate or not with exactly one of its Delaunay neighbours in order to provide service to a user located within its cell.  The cooperation protocol uses a variation of the so-called Willems' encoder and a fixed total transmission power per user is considered. We analytically derive closed form expressions for the coverage probability and we determine the optimal cooperation zones in the network. Numerical evaluation shows benefits in coverage, compared to the common cellular architecture. These however are not very high due to the deterioration in SINR caused by increased outer-cell total interference.


Anastasios Giovanidis received the Diploma in Electrical and Computer Engineering from the National Technical University of Athens, Greece in 2005 and the Doctor of Engineering (Dr.-Ing.) degree from the Technical University of Berlin, Germany in 2010. His thesis was on the analysis and optimization of wireless networks with queues which incorporate the Automatic Retransmission reQuest (ARQ) protocol. Between 2010-2011 he worked as a postdoctoral researcher at the Zuse Institute Berlin (ZIB) in the area of discrete optimization with applications to Telecommunication systems. Since September 2011 he is a PostDoc with the INRIA-TREC group, involved in research related to stochastic geometry models for wireless networks.