A flexible backhaul architecture for small cell networks

Network densification with small cells has been recognized as the key mechanism in addressing the unremitting traffic growth over the next decade. This hierarchical network paradigm is characterized by highly fluctuating traffic demand, vast amount of signaling exchange, as well as progressively intensified resource under-utilization owing to service asymmetry. A flexible backhaul framework is imperative to cope with the above-mentioned challenges. In this paper, we introduce a novel wireless backhaul framework for future small cell networks (SCNs) with a new backhauling component, referred to as Type-A relay. This network entity offers increased architectural flexibility as well as substantial throughput enhancement over the existing LTE relaying-based solutions. Implementation challenges are discussed and potential solutions are provided. Simulation results are presented to demonstrate the strong potential of Type-A relay in future SCNs.