A5005497857- Advanced MIMO Systems Optimization
- Millimeter-Wave Propagation and Modeling
- Advanced Photonic Communication Systems
- Cooperative Communication and Network Coding
- Power Line Communications and Noise
- Telecommunications and Broadcasting Technologies
- Software-Defined Networks and 5G
- Advanced Optical Network Technologies
- Advanced Wireless Communication Technologies
- Digitalization, Law, and Regulation
- Wireless Communication Networks Research
- Criminal Law and Policy
- PAPR reduction in OFDM
- Public Administration and Political Analysis
- Optical Network Technologies
- German Security and Defense Policies
- Energy Harvesting in Wireless Networks
- Wireless Communication Security Techniques
- Optical Wireless Communication Technologies
- Error Correcting Code Techniques
- Wireless Networks and Protocols
- Network Traffic and Congestion Control
- Antenna Design and Optimization
- Advanced Wireless Network Optimization
- Antenna Design and Analysis
Technische Universität Dresden
2013-2018
Vodafone (Germany)
2014-2018
Sicherheit, Informatik und Zentrale Services
2015
University of Bremen
2013
Cloud computing draws significant attention in the information technology (IT) community as it provides ubiquitous on-demand access to a shared pool of configurable resources with minimum management effort. It gains also more impact on communication (CT) and is currently discussed an enabler for flexible, cost-efficient powerful mobile network implementations. Although centralized baseband pools are already investigated radio (RAN) allow efficient resource usage advanced multicell...
Cloud radio access networks promise considerable benefits compared to decentralized network architectures, but they also put challenging requirements on the fronthaul and backhaul network. Flexible centralization can relax these by adaptively assigning different parts of processing chain either centralized baseband processors or base stations based load situation, user scenario, availability links. In this article, we provide a comprehensive overview functional split options analyze their...
Very dense deployments of small cells are one the key enablers to tackle ever-growing demand on mobile bandwidth. In such deployments, centralization RAN functions cloud resources is envisioned overcome severe inter-cell interference and keep costs acceptable. However, back-haul constraints need be considered when designing functional split between front-ends centralized equipment. this paper we analyse outline applications flexible centralization.
This article presents a converged 5G network infrastructure and an overarching architecture to jointly support operational end-user services, proposed by the EU PPP project 5G-XHaul. The 5G-XHaul adopts common fronthaul/backhaul solution, deploying wealth of wireless technologies hybrid active/passive optical transport, supporting flexible fronthaul split options. is evaluated through novel modeling. Numerical results indicate significant energy savings at expense increased service delay.
To meet the requirements of 5G mobile networks, several radio access technologies, such as millimeter wave communications and massive MIMO, are being proposed. In addition, cloud network (C-RAN) architectures considered instrumental to fully exploit capabilities future RANs. However, RAN centralization imposes stringent on transport network, which today addressed with purpose-specific expensive fronthaul links. As demands networks rise, so will challenges in backhaul segments. It is hence...
The increased carrier bandwidth and the number of antenna elements expected in 5G networks require a redesign traditional IP-based backhaul CPRI-based fronthaul interfaces used 4G networks. We envision future mobile to encompass these legacy together with novel RAN functional splits. In this scenario, consistent transport network architecture able jointly support 4G/5G is paramount importance. article we present 5G-XHaul, featuring wireless optical technologies multi-technology software...
To meet the increasing capacity demands of future mobile networks, dense deployment radio access nodes in combination with partly centralized processing by means a cloud-based architecture is promising option. In such an architecture, design and optimization backhaul plays crucial role. this paper, we review different technologies available discuss their characteristics for use networks. We point out how heterogeneous network flexible centralization enables proposed give outlook on joint can...
We propose an optical-wireless 5G infrastructure offering converged fronthauling/backhauling functions to support both operational and end-user cloud services. A layered architectural structure required efficiently these services is shown. The data plane performance of the proposed evaluated in terms energy consumption service delay through a novel modelling framework. Our results show that architecture can offer significant savings but there clear trade-off between overall delay.
Abstract The common European Information and Communications Technology sector vision for 5G is that it should leverage on the strengths of both optical wireless technologies. In context, a wide spectra radio access technologies—such as millimetre wave transmission, massive multiple‐input multiple‐output new waveforms—demand high capacity, highly flexible convergent transport networks. As requirements imposed future networks rise, so do challenges in network. Hence, 5G‐XHaul proposes...
Fronthaul (FH) bandwidth in cloud radio access network (C-RAN) can be significantly reduced with an appropriate functional split by offloading more signal processing functionalities to the remote unit (RRU). However, this not only reduces acclaimed centralization benefits but also increases complexity of RRU. Considering practical aspects such as power consumption, cost, size and weight, it is often desirable make RRUs simple, yet efficient, possible. In paper, we analyze RRU 5G New Radio...
In this paper, we provide a quantitative evaluation of the deployment aspects and dimensioning 5G transport architecture in representative European city. particular, select an example dense urban city scenario based on Barcelona, illustrate how network defined by 5G-XHaul project can be deployed that environment. Building case discuss physical aspects, such as locations to deploy small cells, many compute facilities should scattered throughout city, or where control plane functions deployed....
One major topic of research into self-organizing network technology is the coordination SON use cases. Network operators expect a coordinated handling parameter and configuration changes submitted to operating by closed-loop case implementations. There are currently two basic approaches for discussed in literature: A so-called heading or tailing external combination separate cases one joint algorithm. In this paper, we extend verified framework combine mobility load balancing inter-cell...
Cloud-based centralized processing is one approach to improve mobile networks in terms of capacity, energy consumption, utilization, and cost. However, some joint techniques envisioned for such cloud-based require the backhauling received symbols, usually form an I/Q-stream, which requires a drastically higher data rate on backhaul link than decoded user data. Until recently, required could only be provided by fiber not wireless links, deployed easier at lower In this paper, we propose...
Despite the promising benefits of cloud-radio access network (C-RAN), fronthaul (FH) imposes stringent requirements in terms data rate, latency, jitter and synchronisation. In classical C-RAN, FH capacity scales linearly with number transmitting antennas, which has posed severe demands on capacity, especially due to emerging 5G technologies such as massive MIMO. However, this can be relaxed by performing precoding at remote radio units (RRUs) instead centrally, leading traffic depends...
In cloud-based radio access networks, remote units and central baseband are connected by fronthaul links, which commonly assumed to be error-free. However, especially for wireless millimeter wave this might challenging achieve, as they face a more unreliable environment than the conventionally used fiber links. paper, we hence aim mitigate impact of imperfect For this, propose concept joint reception, considers recover transmitted messages correctly at centralized unit, rather ensure nearly...
This paper provides an overview of joint radio access network (RAN) and backhaul (BH) optimization methods in dense small cell networks, assuming a heterogeneous centralization by Cloud RAN. The main focus is on the design novel MAC (medium control) RRM (radio resource management) schemes for constrained, non-ideal which can influence RAN performance. In this context, we provide some key technology approaches incorporate RAN/BH awareness at cloud exploit benefits Cloud-RAN dynamically...
Cloud-based radio access networks, which utilize a centralized baseband unit, require additional fronthaul links as compared to conventional networks. While fiber is commonly used for these links, millimeter wave technology offers cost-effective alternative on the "last mile" of network. However, has deal with increased attenuation outdoor wireless channels, poses challenges design such links. In this work, we combine an optimized quantizer improved detection scheme increase performance...
A mobile network employing a so-called cloud-based architecture requires an additional fronthaul to forward digitized samples. With increasingly dense deployments of small cells, the availability high quality fiber cannot be expected at all sites. Longer distances or employment wireless technologies renders links imperfect in sense that they introduce bit-errors into digital In this work, we build upon hardware noise resilient decoders investigate for can achieve very good performance even...
Cloud-radio access network (C-RAN) has been an attractive solution in the recent years for future generation mobile networks due to its promising benefits. However, transport link between remote radio unit (RRU) and baseband (BBU), known as fronthaul (FH), imposes stringent requirements terms of data rate, latency, jitter, synchronization. In conventional C-RAN, FH capacity scales linearly with number transmitting antennas, which posed severe demands on capacity, especially emerging 5G...
One of the aims beyond 5G (B5G) wireless communication networks is to increase data rates, while keeping lower latency and high energy efficiency. To achieve this, massive multiple-input-multiple-output (mMIMO) systems combined with two dimensional (2D) active antenna array (AAA) design are expected play a key role. The main objective this paper 2D-AAA beamforming both in azimuth elevation directions order improve spectral efficiency Furthermore, we evaluate impact designed on...
The use of soft information instead hard bits has been widely adapted in signal processing for digital communication to improve the reliability data transmission by techniques like turbo equalization, decoding, or LDPC codes. For future mobile networks employing a centralized architecture which antenna and baseband are separated an additional fronthaul channel that forwards digitalized samples, we have identified another process can be redesigned embrace concept information: dequantizer. A...