Ultra-Dense Heterogeneous Networks

Description

Driven by the ever-increasing amount of mobile data, cellular networks evolve from small cell network to ultra-dense heterogeneous networks, to provide high system capacity and spectrum efficiency. By bringing base stations (BSs) to the approximate spatial scale and number magnitude, ultra-dense heterogeneous networks would definitely bring unprecedented paradigm changes to the network design. Firstly, along with densification of small cells, inter-cell interference becomes severe and may deteriorate performance of mobile users. Assigning network resources including bandwidth and time slots, while avoiding interference, desires serious consideration. Secondly, the coverage area of BSs becomes small and irregular, resulting in much frequent and complicated handovers when mobile users move around. How to ensure continuous communication and implement effective mobility management, and inter-cell resource allocation and cooperation, remains a challenging issue. Thirdly, such dynamic change in spatial dimension enables us to re-investigate available and ongoing communications and networking techniques, such as massive MIMO, CoMP, millimeter waves (mmWaves), carrier aggregation, full duplex radio, and D2D communications. To address the aforementioned challenging research issues, this book will investigate the service and QoE provisioning in ultra-dense heterogeneous networks. In particular, firstly we introduce ultra-dense heterogeneous networks by careful definition regarding spatial deployment, generic characteristics, and requirements of ultra-dense heterogeneous networks in order to ensure QoE of mobile users. Secondly, we depict the resource management among small cells in close proximity, mobility management for mobile users (address the super-frequent handovers), and interference management (dealing with the interference due to frequency-reuse in the vicinity). Thirdly, we study the enabling factors, and the integration of ultra-dense heterogeneous networks with enabling technologies, such as massive-MIMO, cloud-RAN, mmWaves, D2D, IoT. Finally, we conclude the book and indicate future directions and challenges. Cover Half Title Title Page Copyright Page Contents Chapter 1: Introduction 1.1. Prospects and reviews of communication networks 1.1.1. Front End Network 1.1.2. Core Network 1.1.3. Backhauling 1.2. Ultra-dense network 1.2.1. Definitions of UDN 1.2.2. Characteristics of UDNs 1.2.3. Performance Metrics 1.3. Outline Chapter 2: Resource and Interference Management 2.1. Modeling techniques 2.1.1. Stochastic Geometry 2.1.2. Game Theory 2.2. Resource management in ultra-dense heterogeneous network 2.2.1. QoE Provisioning Techniques with OFDMA or NOMA 2.2.2. Load Balancing 2.2.3. Energy-Saving Techniques 2.3. Interference management 2.3.1. Interference Coordination 2.3.2. Spectrum Sharing 2.3.3. Beamforming 2.4. Summary Chapter 3: Mobility Management 3.1. UE association 3.1.1. UE Association in Conventional Cellular Networks 3.1.2. Cell Range Expansion (CRE) in UDNs 3.1.3. Coordinated Multiple Points in UDNs 3.2. Mobility management 3.3. Summary Chapter 4: Enabling Factors and Emerging Techniques 4.1. Massive-MIMO 4.2. Machine learning 4.3. Software defined network (SDN) 4.4. Cloud-radio access network (C-RAN) 4.5. mmWaves 4.6. Proactive caching 4.7. Summary Chapter 5: Promising Applications 5.1. Internet of things 5.2. Mobile edge computing 5.3. Wireless energy harvesting 5.4. Self-driving or autonomous vehicles 5.5. Summary Chapter 6: Summary and Future Work References Index