Overview on initial METIS D2D concept
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paper_title: Smart mobility management for D2D communications in 5G networks

paper_content:

Direct device-to-device (D2D) communications is regarded as a promising technology to provide low-power, high-data rate and low-latency services between end-users in the future 5G networks. However, it may not always be feasible to provide low-latency reliable communication between end-users due to the nature of mobility. For instance, the latency could be increased when several controlling nodes have to exchange D2D related information among each other. Moreover, the introduced signaling overhead due to D2D operation need to be minimized. Therefore, in this paper, we propose several mobility management solutions with their technical challenges and expected gains under the assumptions of 5G small cell networks.
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paper_title: 5G small cell optimized radio design

paper_content:

The 5th generation (5G) of mobile radio access technologies is expected to become available for commercial launch around 2020. In this paper, we present our envisioned 5G system design optimized for small cell deployment taking a clean slate approach, i.e. removing most compatibility constraints with the previous generations of mobile radio access technologies. This paper mainly covers the physical layer aspects of the 5G concept design.
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paper_title: On the performance gain of flexible UL/DL TDD with centralized and decentralized resource allocation in dense 5G deployments

paper_content:

Ultra dense small cell deployments and a very large number of applications are expected to be the essential aspects of the newly emerging 5th generation (5G) wireless communication system. To match the diverse quality of service requirements imposed by a variety of applications, dynamic TDD is proposed as a solution by enabling flexible utilization of the spectrum for uplink and downlink of each cell. In this paper, the system performance of flexible (dynamic) TDD is compared to a fixed portioning of resources for uplink and downlink. Further, the degree of centralization for resource management is investigated in the context of dynamic TDD, because multi-cell scheduling will be important for the design of 5G ultra-dense network architecture. The results show that dynamic TDD is indeed a very promising option for 5G networks, and substantially decreases packet outage delays. We find that the performance gap between centralized and decentralized scheduling is small in case of planned deployments. However, centralized scheduling may be beneficial in certain dynamic TDD deployment scenarios with a very asymmetric access point distribution.
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Title: Overview on initial METIS D2D concept

Section 1: Introduction
Description 1: Provide an introduction to the METIS project and its objectives, especially focusing on the goals for the 5G system concept and its relevance to beyond-2020 scenarios.

Section 2: METIS Scenarios and Horizontal Topics
Description 2: Discuss the identified scenarios and applications for the connected information society and detail the selected Horizontal Topics (HTs) including Direct Device-to-Device (D2D) communication.

Section 3: Technical Challenges
Description 3: Outline the key technical challenges for D2D communication including device discovery, communication mode selection, coexistence and interference management, and multi-operator D2D operation.

Section 4: METIS HT D2D Concept
Description 4: Introduce the initial METIS D2D concept and its core technology components designed to address the identified technical challenges, such as flexible air interface, device discovery, mobility management, D2D relay, and spectrum management/sharing.

Section 5: D2D Performance Evaluation
Description 5: Analyze the system performance of specific D2D technology components, including enhanced Inter-Cell Interference Coordination (ICIC) in D2D enabled HetNets and multi-cell coordinated and flexible mode selection and resource allocation for D2D.

Section 6: Conclusions
Description 6: Summarize the METIS D2D concept's ability to address various technical challenges and highlight the substantial gains achieved through the proposed technology components. Discuss potential future evaluations and analyses.