◆英語タイトル:5G full steam ahead : Worldwide initiatives, technologies and roadmap
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*** レポート概要(サマリー)***

This report provides its readers with the state of the art regarding the 5G project:
• An overview and summary of the main international 5G initiatives
• The main criteria 5G should fulfill (eg. reduced latency, lower costs, adaptive network technology, …) and for what reasons
• Needed evolution of RAN and Core network
• Spectral issues (beyond 6Ghz)
It then also draws a roadmap when, where and how 5G networks will be first deployed.

*** レポート目次(コンテンツ)***

1. Executive Summary

2. Methodology

3. 5G initiatives around the world and international cooperation
3.1. The 5G PPP, the European Commission R&D initiative
3.2. 5G Forum, the South Korean initiative
3.3. The 5G Mobile Forum (5GMF, Japan, www.5gmf.jp)
3.4. 4G Americas (USA, www.4Gamericas.org)
3.5. IMT-2020 (5G) Promotion Group, the Chinese initiative
3.6. Academic research programmes
3.6.1. UK universities
3.6.2. US universities
3.6.3. Other universities

4. 5G technologies
4.1. The philosophy
4.1.1. Improved signalling and control
4.1.2. Increased mobility
4.1.3. Reduced latency
4.1.4. Taking vertical industries into account
4.1.5. Beyond the traditional cellular architecture
4.1.6. Support for more categories of devices
4.1.7. Reducing the energy footprint
4.1.8. Adaptive and flexible technologies
4.1.9. Reduced opex and capex
4.2. Improvement technologies (backward compatibility with LTE)
4.2.1. Radio Access Network
4.2.2. Core Network evolutions
4.3. Breakthrough technologies: new radio access technologies
4.3.1. New waveforms & access schemes
4.3.2. Full duplex
4.4. 5G spectrum
4.4.1. Below 6 GHz
4.4.2. Between 6 and 100 GHz

5. 5G roadmap

Table 1: Development path of mobile communications as a media
Table 2: Free space path loss depending on frequency band
Table 3: Number of bits per symbol with QAM modulation
Table 4: Usage of SC-FDMA and OFDMA depending on the distance to the centre of the cell
Table 5: Comparison of access principles in existing and futre radio access technologies
Table 6: WRC-2015 candidate bands

Figure 1: 5G projects roadmap
Figure 2: 5G Forum Korea vision
Figure 3: 5G Forum Korea requirements
Figure 4: Typical services and requirements, 5G Forum view
Figure 5: Structure of the IMT-2020 (5G) Promotion Group
Figure 6: 5GIC purpose-built building
Figure 7: SoftRAN by ONRC
Figure 8: The 5G Lab environment
Figure 9: Performance objectives for 5G and associated use cases
Figure 10: Impact of packet loss on speed performance
Figure 11: Proposed evolution of signalling and control in packet frames
Figure 12: TDD Frame structure for latency reduction
Figure 13: Presentation of the three main services of 5G and their specific requirements
Figure 14: Presentation of Huawei UE Centric No Cell Radio Access (UCNC) concept.
Figure 15: 5G Cloud RAN enabling flexible deployment and network architecture
Figure 16: Cohabitation with multiple air interface and 5G development efforts
Figure 17: Challenges associated with Massive MIMO
Figure 18: Considerations on massive MIMO
Figure 19: The different use of massive MIMO depending on frequency bands
Figure 20: Simulation by Mitsubishi using a 48-element adaptive phase antenna array using 44 GHz frequency bands and 500 MHz of bandwidth
Figure 21: A new modulation for more energy efficiency of MTC
Figure 22: Inter-layer and intra-layer multi-connectivity
Figure 23: Terminal-Small Cell concept by Chinese device manufacturer Coolpad
Figure 24: 5G core network architecture
Figure 25: RAN integration within 5G
Figure 26: Presentation of network slicing by T-Mobile
Figure 27: Separation of user and control plane
Figure 28: Adaptive Frame Structure
Figure 29: Waveforms and frequency bands
Figure 30: Comparison of Orthogonal and non-Orthogonal waveforms
Figure 31: Duplex mode for 5G
Figure 32: Challenges related to harnessing higher frequency bands
Figure 33: Spectrum map for frequency bands between 6 and 100 GHz
Figure 34: Current 5G roadmap
Figure 35: Ericsson roadmap for the development of a new 5G air interface

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