Chapter 1 Architectures and Cross-Layer Design for Cognitive Networks

Network evolution towards self-aware autonomous adaptive networking attempts to overcome the inefficiency of configuring and managing networks, which leads to performancedegradation. In order to optimize network operations, the introduction of self-awareness, self-management, and self-healing into the network was proposed. This created a new paradigm in networking, known as cognitive networking. This chapter describes state-of-the-art, as well as future directions in cogni-tive networking. Fundamental techniques for enabling cognitive properties, such as, adaptation, learning, and goal optimization processes are detailed in this text. A comparison of available research proposals leads to the design of a promising cognitive network architecture capable of incorporating cognitive network tech-niques. Finally, a discussion on the required properties of the cross-layer design for cognitive networks and deployment issues are specified. Requirements and expectations on network services have constantly evolved. The evolution of communication technologies, especially in the wireless domain, intro