On the Degrees of Freedom of Interference Broadcast Channels With Topological Interference Management

PROJECT TITLE :

On the Degrees of Freedom of Interference Broadcast Channels With Topological Interference Management

ABSTRACT:

Topological interference management is that the study of achievable rates within Communication networks with no channel state data at the transmitter (CSIT) beyond data of the network structure itself. In this work, we tend to study the degrees of freedom (DoF) of a two-cell 2-user-per-cell interference broadcast channel (IBC) with alternating connectivity and global topological interference management. The topological info permits transmitters to trace the changing network topology and exploit the varying connectivity states to attain a DoF gain. We derive novel DoF outer bounds for the 2-cell two-user-per-cell IBC with alternating connectivity. This analysis is dispensed for different system configurations, particularly, single-input single-output (SISO), multiple-input single-output (MISO), and multiple-input multiple-output (MIMO) systems. While global channel information is always restricted to topological information only, we tend to introduce a mixed CSIT setting where varying degrees of local CSIT availability are considered depending on the system configuration. Additionally, we investigate the achievability of the derived bounds and propose new transmission schemes primarily based on joint coding across states. Results show that DoF over those conventionally obtained without global topological data are achievable, indicating that even such a minimal level of worldwide CSIT continues to be highly useful.

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