HetNets with Cognitive Small Cells: User Offloading and Distributed Channel Access Techniques

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: Jun 2013 Format: PDF
Heterogeneous networks, consisting of macrocells overlaid with small cells (e.g., femtocells, picocells and microcells) provide a fast, flexible, cost-efficient, and fine-tuned design and expansion for existing cellular wireless networks to satisfy the ever increasing demand for network capacity. In HetNets, small cells serve as offloading spots in the radio access network to offload users and their associated traffic from congested macrocells. However, due to their large-scale deployment in random locations, limited transmit power, and the lack of complete coordination, the coexistence and efficient operation of small cells is very challenging.

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