RAS1 – Radio resource management and cell planning

Tuesday, 19 June 2018, 11:30-13:00, E1 hall
Session chair: Hugo Tullberg (Ericsson Research, Sweden)


11:30 – A Game-Theoretic Approach for NOMA-ALOHA

Jinho Choi (Gwangju Institute of Science and Technology (GIST), Korea)
Non-orthogonal multiple access (NOMA) can improve the spectral efficiency by exploiting the power domain and successive interference cancellation (SIC), and it can be applied to various transmission schemes including random access that plays a crucial role in the Internet of Things (IoT) to support connectivity for a number of devices with sparse activity. In this paper, we formulate a game when NOMA is applied to ALOHA to decide the transmission probability. We consider a payoff function based on an energy-efficiency metric and drive the mixed strategy Nash equilibrium (NE).


11:48 – Performance of Neighboring Indoor 5G Micro Operators with Dynamic TDD

Kimmo Hiltunen (University of Oulu, Finland); Marja Matinmikko-Blue (University of Oulu, Centre for Wireless Communications, Finland)
Local small cell deployments complementing the coverage of the existing outdoor networks are vital for the future 5G networks. To make the ultra-dense indoor network deployments more cost-efficient and to promote innovation and competition in the market, new local business and spectrum authorization models are needed. One such model is the recently proposed micro operator concept with spectrum micro licensing that allows the establishment of building-specific 5G networks. While evaluating the applicability of this new concept, the impact of the inter-operator interference on the performance of the victim micro operator is critical. The system simulation results shown in this paper demonstrate how the co-channel interference between two uncoordinated micro operators utilizing dynamic TDD in the 3.5 GHz band and located inside neighboring buildings can result in large throughput losses if the buildings are within a few hundred meters. The main cause for these losses is the interference from the other operator’s base stations. Finally, it is shown that the performance losses are highly scenario-specific: a denser victim network deployment, or a victim network with a higher load suffers less from any external interference. Therefore, the traditional approach of defining a single separation distance for the worst case scenario does not properly model the specifics of 5G networks and can lead to overly protective requirements.



12:06 – Breaking the Access Technologies Silos by Enhancing MAC and RRM in 5G+ Networks

Valerio Frascolla and Bismark Okyere (Intel Deutschland Gmbh, Germany); Andreas Georgakopoulos, Evangelos Kosmatos, Aspa Skalidi and Panagiotis Demestichas (WINGS ICT Solutions, Greece); Benoit Miscopein (CEA, France); Antonio De Domenico and Rida El Chall (CEA-LETI Minatec, France); Jérémy Estavoyer (CEA-Leti, France); Seiamak Vahid, Marcin Filo and Klaus Moessner (University of Surrey, United Kingdom (Great Britain)); Shahid Mumtaz, Jonathan Rodriguez and Kazi Mohammed Saidul Huq (Instituto de Telecomunicações, Portugal); Thanasis Oikonomou, Dimitrios Kritharidis, Panagiotis Panagiotopoulos and Panteleimon-Konstantinos Chartsias (Intracom Telecom, Greece); Keith Briggs (BT Group, United Kingdom (Great Britain)); Uwe Herzog (Eurescom, Germany)
The 5G network is on the verge of being deployed, as the first set of so called 5G features have just been standardized by 3GPP. Never the less several unsolved issues endanger an effective and profitable deployment of 5G systems. This paper proposes some significant enhancements in the backhaul and at MAC and RRM layers, leveraging on a new concept called extended Dynamic Spectrum Access (eDSA) and introducing new algorithms and protocols, one of which based on the Filter Bank Multicarrier (FBMC) technology. The results are mainly taken from the work of SPEED-5G, an EU-funded collaborative research project.


12:24 – Traffic-aware Resource Allocation with Aggregation in Heterogeneous Networks with WLANs

Haeyoung Lee, Seiamak Vahid and Klaus Moessner (University of Surrey, United Kingdom (Great Britain))
We consider resource allocation with aggregation for different types of traffic in heterogeneous networks, including WLANs. While mobile data traffic is expected to increase, efficient management of multiple bands including unlicensed band becomes increasingly important. In this context, we formulate a resource allocation problem using utility functions for heterogeneous traffic and propose a novel algorithm that considers the estimated UE speed, traffic types and channel quality. Simulation results illustrate performance of the proposed algorithm in terms of higher utility value and fairness, even at high traffic loads. Additional improvements in resource utilization through estimating UE speed and allocating low-mobility UEs to Wi-Fi are shown.



12:42 – Concept Design of QoS Oriented MAC for 5G Spectrum Access Systems in 3.5 GHz

Ziad Youssef (Uni DUE, Germany); Erfan Majeed (University of Duisburg-Essen, Germany); Markus Dominik Mueck (Intel Deutschland GmbH, Germany); Ingolf Karls (Intel Mobile Communications GmbH, Germany); Christian Drewes (Intel Mobile Communications, Germany); Guido Bruck (University of Duisburg Essen, Germany); Peter Jung (Universität Duisburg-Essen, Germany)
The federal communications commission (FCC) has addressed a three-tiered spectrum access system (SAS) in the so-called innovation band (3.5 GHz) which includes priority access licenses (PAL) an unlicensed spectrum access as general authorized access (GAA). Hence, the issue of finding a scheme that achieves an optimal spectrum access with quality-of-service (QoS) requirements among the citizens broadband radio service devices (CBSDs) and their nodes in term of maximizing the throughput is addressed. In this paper we present the design and results of a hybrid medium access control (HMAC) scheme for SAS based on a grouping approach using the distributed IEEE 802.11 enhanced distributed coordination function (EDCF) and the point coordination function (PCF) in respect to maximize the system throughput of the GAA users in an unlicensed spectrum. The system improvement shows how the HMAC scheme can be used in a minimum intrusive way to enhance the system throughput compared with the EDCF and PCF (SoA) scheme, especially in the case of overlapping basic service sets (BSS). Moreover, the suggested scheme is able to handle a large number of QoS accessing nodes which opens a new perspective for high connection density in a SAS context and beyond 5G.