Guest editorial

Han-Chieh Chao, Sherali Zeadally, Yueh-Min Huang
2009 Telecommunications Systems  
Cognitive wireless access networks interact and respond to requests of a specific user by dynamically altering their topologies and/or operational parameters to enforce regulatory policies and optimize overall network performance. A cognitive infrastructure consists of intelligent management and reconfigurable elements that can progressively evolve the policies based on their past actions. In this context, the structure of conventional layer protocols is inflexible because it requires layers to
more » ... communicate in a strict manner rather than adapting to dynamic conditions. This results in inefficient use of both energy and spectrum which are valuable resources in wireless environments. A new paradigm is needed for designing protocols in such environments and can be characterized by cross-layer designs and adaptation approaches. Cross-layer design is an emerging research area where some recent results have been reported. However, this area still holds great potential for more comprehensive results that can address many outstanding research issues for emerging applications being deployed in networking environments such as 3G, 4G, Cognitive Networks or Next Generation Networks (NGNs). The Call for Papers for this Special issue attracted more than 30 submissions from Asia, Europe, and the US covering a wide range of topics in the field of cross-layer design for cognitive networks. Each paper was carefully evaluated by
doi:10.1007/s11235-009-9165-x fatcat:6xwm4zdfuzbtzmt2tshsxexm5e