Exploiting Interference Locality in Coordinated Multi-Point Transmission Systems
Coordinated Multi-Point (CoMP) transmission is emerging as a concept that can substantially suppress interference, thus improving the capacity of multi-cell wireless networks. However, existing CoMP techniques either require sharing of data and Channel State Information (CSI) for all links in the network, or have limited capability of interference suppression. In this paper, the authors propose Distributed Interference Alignment and Cancellation (DIAC) to overcome these limitations. DIAC builds on a key intuition of interference locality - since each link is interfered with a limited number of neighboring links, it is sufficient to coordinate with those strong interferers and ignore others, in order to bound the overhead in CoMP.