On the Cooperative Communication over Cognitive Interference Channel

TL;DR

This paper studies the capacity limits of a cognitive interference channel with partially cooperating destinations, deriving bounds and exact capacity regions for specific channel classes to advance understanding of cooperative cognitive networks.

Contribution

It introduces a new upper bound on the capacity region of the cognitive interference channel with partial cooperation and characterizes the capacity for degraded and semideterministic classes.

Findings

Derived a new upper bound on capacity region.

Characterized capacity for degraded CIC-PC.

Established capacity for semideterministic CIC-PC.

Abstract

In this paper, we investigate the problem of communication over cognitive interference channel (CIC) with partially cooperating (PC) destinations (CIC-PC). This channel consists of two source nodes communicating two independent messages to their corresponding destination nodes. One of the sources, referred to as the cognitive source, has a noncausal knowledge of the message of the other source, referred to as the primary source. Each destination is assumed to decode only its intended message. In addition, the destination corresponding to the cognitive source assists the other destination by transmitting cooperative information through a relay link. We derive a new upper bound on the capacity region of discrete memoryless CI-CPC. Moreover, we characterize the capacity region for two new classes of this channel: (1) degraded CIC-PC, and (2) a class of semideterministic CIC-PC.