HSDPA: Analyse der LTE-Ende-zu-Ende-Leistungsfähigkeit

In diesem Projekt wird in Kooperation von nsn, der Universität Bremen und der TUHH/TUTECH das LTE-System betrachtet und optimiert. Im Vordergrund der Arbeiten stehen dabei die Anpassung und Optimierung des Funkschnittstellen-Schedulers im Überlastfall, die Berücksichtigung der Dienstgüte der Funkschnittstelle im Ressourcenmanagement im Zugangsnetz (Transportnetz) und Konzepte für klassenbasierte Dienstgüte vom Core Network bis zum eNB. Für diese Fragestellungen werden Konzepte entworfen und simulativ auf ihre Eignung und die Verbesserung der Ende-zu-Ende-Performance überprüft. 

Publikationen

• Umar Toseef and Thushara Lanka Weerawardane and Andreas Timm-Giel and Carmelita Goerg and H. Kroener: Adaptive Fair Radio Interface Scheduling for LTE Networks High Capacity Optical Networks and Enabling Technologies (HONET), December 2012.
• Umar Toseef and Thushara Lanka Weerawardane and R. Golderer and Stephan Hauth and Carmelita Goerg and Andreas Timm-Giel: Coordinated LTE Uplink Radio Interface Scheduling Wireless and Mobile Networking Conference (WMNC), 2013 6th Joint IFIP: S. 1--8, April 2013.
• Safdar N. K. Marwat and Thushara Lanka Weerawardane and Yasir Naseer Zaki and Carmelita Goerg and Andreas Timm-Giel: Design and Performance Analysis of Bandwidth and QoS Aware LTE Uplink Scheduler in Heterogeneous Traffic Environment Wireless Communications and Mobile Computing Conference (IWCMC), 2012 8th International, August 2012.
• Xi Li and Wojciech Bigos and Dominik Dulas and Yi Chen and Umar Toseef and Carmelita Goerg and Andreas Timm-Giel and Andreas Klug: Dimensioning of the LTE Access Network for the Transport Network Delay QoS 2011 IEEE 73rd Vehicular Technology Conference: VTC2011-Spring, May 2011.
• Xi Li and Umar Toseef and Dominik Dulas and Wojciech Bigos and Carmelita Goerg and Andreas Timm-Giel and Andreas Klug: Dimensioning of the LTE Access Network Telecommunication Systems, Springer Netherlands: S. 1--18, 2011.
• Xi Li and Ming Li and Umar Toseef and Dominik Dulas and Michal Nowacki and Andreas Timm-Giel and Carmelita Goerg and Radoslaw Ruchala: Dimensioning of the Shared Transport Network for Collocated Multiradio:LTE and HSDPA Wireless and Mobile Computing, Networking and Communications (WiMob): S. 308--315, October 2012. Due to the coexistence of different generations of mobile radio technologies, more and more mobile network operators are keen on deploying multiple radio technologies on a single cell site and carry their traffic over a common transport network. This paper studies such a collocated multiradio system: collocated LTE and HSDPA. Firstly, we investigate the potential gain by using a shared transport network to carry different radio technologies. Furthermore, this paper proposes analytical models to dimension the shared transport network for elastic traffic (TCP-based traffic) from the different radio technologies, by taking traffic characteristics, QoS requirements of each radio technology and the deployed transport QoS function and packet scheduling into considerations. The proposal for modeling the shared transport network is to apply the M/G/R-PS model per QoS class while taking the potential multiplexing gain of bandwidth sharing among the different QoS classes into account. For validating the analytical models, a system simulation model is developed. The analytical results derived from the proposed dimensioning models are validated by comparing with the simulation results for various traffic and network scenarios. Presented results demonstrate that proposed analytical models are well suitable for dimensioning of the shared transport network. With the help of the proposed analytical models, we analyze the potential sharing gain of such a shared transport system under different traffic loads and mix of different radio technologies..
• Ming Li and Umar Toseef and Xi Li and Andras Balazs and Andreas Timm-Giel and Carmelita Goerg: Investigating the Impacts of IP Transport Impairments on Data Services in LTE Networks The First European Teletraffic Seminar, May 2011.
• Umar Toseef and Ming Li and Andras Balazs and Xi Li and Andreas Timm-Giel and Carmelita Goerg: Investigating the Impacts of IP Transport Impairments on VoIP service in LTE Networks 16. VDE/ITG Fachtagung Mobilkommunikation, February 2011.
• Ming Li and Liang Zhao and Xi Li and Xiaona Li and Yasir Naseer Zaki and Andreas Timm-Giel and Carmelita Goerg: Investigation of Network Virtualization and Load Balancing Techniques in LTE Networks Vehicular Technology Conference (VTC Spring), 2012 IEEE 75th: S. 1--5, May 2012. Mobile Network Virtualization (NV) is an emerging technique which has drawn increasingly research attention. Network Virtualization enables multiple network operators to share a common infrastructure (including core network, transport network and access network) so as to reduce the investment capital while improving the overall performance at the same time. This is achieved by exploring the multiplexing gain. Similarly, Load Balancing (LB) is a well-known mechanism used in mobile networks to offload excessive traffic from high-load cells (hot spots) to low-load ones within one network operator. This paper aims at investigating the potential gain of applying NV in LTE (Long Term Evolution) networks and compares it with the LB scheme gain. In this paper, we propose an LTE virtualization framework (that enables spectrum sharing) and a dynamic load balancing scheme for multi-eNB and multi-VO (Virtual Operator) systems. We compare the performance gain of both schemes for different applications, e.g. VoIP, video, HTTP and FTP. We also investigate the parameterization of both schemes, e.g. sharing intervals, LB intervals and safety margins, in order to find the optimal parameter settings. The presented results show that the LTE networks can benefit from both NV and LB techniques..
• Yasir Naseer Zaki and Liang Zhao and Carmelita Goerg and Andreas Timm-Giel: LTE Mobile Network Virtualization - Exploiting Multiplexing and Multi-User Diversity Gain Mobile Networks and Applications: S. 1--9, 2011.
• Umar Toseef and Thushara Lanka Weerawardane and Andreas Timm-Giel and Carmelita Goerg: LTE System Performance Optimization by Discard Timer Based PDCP Buffer Management High Capacity Optical Networks and Enabling Technologies (HONET): S. 116--121, December 2011.
• Umar Toseef and Thushara Lanka Weerawardane and Andreas Timm-Giel and Carmelita Goerg: LTE System Performance Optimization by RED Based PDCP Buffer Management 17. ITG Fachtagung Mobilkommunikation, May 2012.
• Yasir Naseer Zaki and Thushara Lanka Weerawardane and Carmelita Goerg and Andreas Timm-Giel: Long Term Evolution (LTE) Models development within OPNET Simulation Environment , August 2011.
• Yasir Naseer Zaki and Thushara Lanka Weerawardane and Andreas Timm-Giel and Carmelita Goerg: Multi-QoS-aware Fair Scheduling for LTE 2011 IEEE 73rd Vehicular Technology Conference: VTC2011-Spring, May 2011.
• Yasir Naseer Zaki and Nikola Zahariev and Thushara Lanka Weerawardane and Carmelita Goerg and Andreas Timm-Giel: Optimized Service Aware LTE MAC Scheduler: Design, Implementation and Performance Evaluation , August 2011.
• Nikola Zahariev and Yasir Naseer Zaki and Thushara Lanka Weerawardane and Xi Li and Carmelita Goerg and Andreas Timm-Giel: Optimized service aware lte mac scheduler with comparison against other well known schedulers 10th International Conference, WWIC 2012, Santorini, Greece, June 6-8, 2012. : S. 323--331, June 2012.
• Umar Toseef and Thushara Lanka Weerawardane and Andreas Timm-Giel and Carmelita Goerg: Performance Comparison of PDCP Buffer Management Schemes in LTE System Wireless Days (WD), October 2011.
• Safdar N. K. Marwat and Thushara Lanka Weerawardane and Yasir Naseer Zaki and Carmelita Goerg and Andreas Timm-Giel: Performance Evaluation of Bandwidth and QoS Aware LTE Uplink Scheduler 10th International Conference, WWIC 2012, Santorini, Greece, June 6-8, 2012, June 2012.
• Safdar N. K. Marwat and Yasir Naseer Zaki and Thushara Lanka Weerawardane and Carmelita Goerg and Andreas Timm-Giel: Performance of Bandwidth and QoS Aware LTE Uplink Scheduler Towards Delay Sensitive Traffic 17. ITG Fachtagung Mobilkommunikation, May 2012.