Torsten Fahldieck

Bio: Torsten Fahldieck is an academic researcher from Alcatel-Lucent. The author has contributed to research in topics: Base station identity code & Base station. The author has an hindex of 6, co-authored 12 publications receiving 211 citations. Previous affiliations of Torsten Fahldieck include Bell Labs.

Spectrum sharing improves the network efficiency for cellular operators

Abstract: The article describes the potential gain by spectrum sharing between cellular operators in terms of network efficiency. The focus of the study is on a specific resource sharing scenario: spectrum sharing between two operators in cellular downlink transmission. If frequency bands are allocated dynamically and exclusively to one operator - a case called orthogonal spectrum sharing - significant gains in terms of achievable throughput (spectrum sharing gains between 50 percent and 100 percent) and user satisfaction are reported for asymmetric scenarios at link and system level as well as from two hardware demonstrators. Additionally, if frequency bands are allocated simultaneously to two operators - a case called non-orthogonal spectrum sharing - further gains are reported. In order to achieve these, different enablers from hardware technologies and base station capabilities are required. However, we argue that all requirements are fulfilled in 3GPP and newer mobile standards. Therefore, the results and conclusions of this overview article encourage to seriously consider the inter-operator spectrum sharing technologies.

Resource sharing in wireless networks: The SAPHYRE approach

Abstract: Physical resource sharing between wireless operators and service providers is necessary in order to support efficient, competitive, and innovative wireless communication markets. By sharing resources, such as spectrum or infrastructure, which are usually exclusively allocated interference is created on the physical layer. Therefore, the economic gains, regulatory overhead, and engineering efforts need to be addressed by a consolidated cross-layer approach. This paper describes briefly the approach taken by the EU FP7 project SAPHYRE.

Scheduling of data on shared radio resources

Abstract: The invention relates to a method for scheduling data flows (FLA,J, FLB,J) of at least two operators (OPA, OPB) sharing the same radio resources (RR), in particular sharing the same frequency spectrum, the method comprising: assigning an exclusive amount (PRBEX,A, PRBEX,B) of the radio resources (RR) to each of the operators (OPA, OPB), each exclusive amount (PRBEX,A, PRBEX,B) to be used for scheduling data flows (FLA,J, FLB,J) of only a single operator (OPA; OPB), and assigning a shared amount (PRBS) of the radio resources (RR) to the operators (OPA, OPB), the shared amount (PRBS) being used for scheduling data flows (FLA,J, FLB,J) of different operators (OPA, OPB), wherein the data flows (FLA,J, FLB,J) of the at least two operators (OPA, OPB) are scheduled using at least the exclusive amounts (PRBEX,A, PRBEX,B) of the radio resources (RR) assigned to the operators (OPA, OPB). The invention also relates to a base station (BS) for performing the scheduling, and to a wireless communications network (1).

Method for forwarding MAC protocol data units in a mobile radio communication network, corresponding communication end point and relay station

Abstract: The present invention relates to a method for forwarding MAC protocol data units in a mobile radio communication network from a communication endpoint, herein called sender side, to a peer communication endpoint, herein called receiver side, at least one relay station being used on the path between said communication endpoints. According to the present invention, the method comprises the steps of: Extracting out of topology information available at said sender side at least one indicator describing the path between relay station and said receiver side, Including said indicator of the path between said relay station and said receiver side in said MAC protocol data unit in addition to an indicator of the path between said sender side and said relay station.

Method for operating a base station of a wireless network, method for operating a terminal of a wireless network, base station, and terminal

Abstract: The present invention refers to a method for operating a base station (13) of a wireless network (11). In order to augment the capacity of the network (11) and using the transmission resources (23, 29) efficiently, it is suggested that the method comprise communicating (49) with at least one terminal (15) of the network (11) via a first radio system (21) using centralized media access control for controlling an access to transmission resources (23) of the first radio system (21), communicating (51) with the at least one terminal (15) via a second radio system (31) different from the first radio system (21), and transmitting at least one resource grant message (61) to the terminal (15) via the first radio system (21), the resource grant message (61) indicating at least one portion of transmission resources (29) of the second radio system (31) assigned to the terminal (15). Furthermore the present invention refers to a corresponding method for operating the terminal (15), a corresponding base station (15) and a corresponding terminal (15).

5G Mobile and Wireless Communications Technology

Abstract: Written by leading experts in 5G research, this book is a comprehensive overview of the current state of 5G. Covering everything from the most likely use cases, spectrum aspects, and a wide range of technology options to potential 5G system architectures, it is an indispensable reference for academics and professionals involved in wireless and mobile communications. Global research efforts are summarised, and key component technologies including D2D, mm-wave communications, massive MIMO, coordinated multi-point, wireless network coding, interference management and spectrum issues are described and explained. The significance of 5G for the automotive, building, energy, and manufacturing economic sectors is addressed, as is the relationship between IoT, machine type communications, and cyber-physical systems. This essential resource equips you with a solid insight into the nature, impact and opportunities of 5G.

Multiobjective Signal Processing Optimization: The way to balance conflicting metrics in 5G systems

Abstract: The evolution of cellular networks is driven by the dream of ubiquitous wireless connectivity: any data service is instantly accessible everywhere. With each generation of cellular networks, we have moved closer to this wireless dream; first by delivering wireless access to voice communications, then by providing wireless data services, and recently by delivering a Wi-Fi-like experience with wide-area coverage and user mobility management. The support for high data rates has been the main objective in recent years [1], as seen from the academic focus on sum-rate optimization and the efforts from standardization bodies to meet the peak rate requirements specified in IMT-Advanced. In contrast, a variety of metrics/objectives are put forward in the technological preparations for fifth-generation (5G) networks: higher peak rates, improved coverage with uniform user experience, higher reliability and lower latency, better energy efficiency (EE), lower-cost user devices and services, better scalability with number of devices, etc. These multiple objectives are coupled, often in a conflicting manner such that improvements in one objective lead to degradation in the other objectives. Hence, the design of future networks calls for new optimization tools that properly handle the existence of multiple objectives and tradeoffs between them.

Green Communication in Next Generation Cellular Networks: A Survey

Abstract: In order to meet the intense user demands, the 5G networks are evolving, and will be available by 2020. The unfolding cellular technology has raised the energy consumption in mobile networks with the carbon footprint surging to alarming rates. This is causing an adverse effect on the environment and human health. Addressing these aspects, this paper presents a survey on techniques for making the next generation cellular networks GREEN. A number of technologies form a part of the 5G networks, in order to support the drastic user demands, and are receiving substantial attention from the perspective of green communication. These include device-to-device communication, spectrum sharing, ultra dense networks, massive MIMO, and the Internet of Things. Also, a prime concern in the current scenario is the battery life of the mobile terminals. For enhancing the battery life of the user terminals, a proposal is given in this paper, with spectrum sharing as its basis, to overcome the energy crunch. Major research challenges have been discussed, and the ongoing projects and standardization activities also stated in this paper.

System and method for virtualized functions in control and data planes

Abstract: Methods and apparatus for management of network slices in a communication network such as a 5 th generation wireless communication network are provided. Management planes may be provided which are separate from the plurality of network slices. A connection manager residing in a management plane receives an indication that a mobile device is to be associated with the communication network. The connection manager may reside at an access node or in the core network. A network slice is determined, and the connection manager transmits instructions, to one or more network nodes, to associate the mobile device with the network slice. The instructions may be provided to a local connection manager. The slice may be requested explicitly by the mobile device, or determined based on device and/or network requirements.

Licensed Spectrum Sharing Schemes for Mobile Operators: A Survey and Outlook

Abstract: The ongoing development of mobile communication networks to support a wide range of superfast broadband services has led to massive capacity demand. This problem is expected to be a significant concern during the deployment of the 5G wireless networks. The demand for additional spectrum to accommodate mobile services supporting higher data rates and having lower latency requirements, as well as the need to provide ubiquitous connectivity with the advent of the Internet of Things sector, is likely to considerably exceed the supply, based on the current policy of exclusive spectrum allocation to mobile cellular systems. Hence, the imminent spectrum shortage has introduced a new impetus to identify practical solutions to make the most efficient use of scarce licensed bands in a shared manner. Recently, the concept of dynamic spectrum sharing has received considerable attention from regulatory bodies and governments globally, as it could potentially open new opportunities for mobile operators to exploit spectrum bands whenever they are underutilized by their owners, subject to service level agreements. Although various sharing paradigms have been proposed and discussed, the impact and performance gains of different schemes can be scenario-specific, and may vary depending on the nature of the sharing players, the level of sharing and spectrum access scheme. In this survey, we study the main concepts of dynamic spectrum sharing, different sharing scenarios, as well as the major challenges associated with sharing of licensed bands. Finally, we conclude this survey with open research challenges and suggest some future research directions.