TY - CHAP U1 - Konferenzveröffentlichung A1 - Amjad, Zubair A1 - Sikora, Axel A1 - Hilt, Benoit A1 - Lauffenburger, Jean-Philippe T1 - Low Latency V2X Applications and Network Requirements: Performance Evaluation T2 - 2018 IEEE Intelligent Vehicles Symposium (IV), 26-30 June 2018, Changshu, China N2 - Vehicle-to-Everything (V2X) communication promises improvements in road safety and efficiency by enabling low-latency and reliable communication services for vehicles. Besides using Mobile Broadband (MBB), there is a need to develop Ultra Reliable Low Latency Communications (URLLC) applications with cellular networks especially when safety-related driving applications are concerned. Future cellular networks are expected to support novel latencysensitive use cases. Many applications of V2X communication, like collaborative autonomous driving requires very low latency and high reliability in order to support real-time communication between vehicles and other network elements. In this paper, we classify V2X use-cases and their requirements in order to identify cellular network technologies able to support them. The bottleneck problem of the medium access in 4G Long Term Evolution(LTE) networks is random access procedure. It is evaluated through simulations to further detail the future limitations and requirements. Limitations and improvement possibilities for next generation of cellular networks are finally detailed. Moreover, the results presented in this paper provide the limits of different parameter sets with regard to the requirements of V2X-based applications. In doing this, a starting point to migrate to Narrowband IoT (NB-IoT) or 5G - solutions is given. Y1 - 2018 SN - 1931-0587 SS - 1931-0587 SN - 978-1-5386-4452-2 (digital) SB - 978-1-5386-4452-2 (digital) SN - 978-1-5386-4451-5 (USB) SB - 978-1-5386-4451-5 (USB) SN - 978-1-5386-4453-9 (Print on Demand) SB - 978-1-5386-4453-9 (Print on Demand) U6 - https://dx.doi.org/10.1109/IVS.2018.8500531 DO - https://dx.doi.org/10.1109/IVS.2018.8500531 SP - 220 EP - 225 S1 - 6 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Amjad, Zubair A1 - Sikora, Axel A1 - Lauffenburger, Jean-Philippe T1 - Latency Reduction in Narrowband 4G LTE Networks T2 - Proceedings of the 15th International IEEE Symposium on Wireless Communication Systems (ISWCS), 28-31 August 2018, Lisbon, Portugal N2 - The next generation cellular networks are expected to improve reliability, energy efficiency, data rate, capacity and latency. Originally, Machine Type Communication (MTC) was designed for low-bandwidth high-latency applications such as, environmental sensing, smart dustbin, etc., but there is additional demand around applications with low latency requirements, like industrial automation, driver-less cars, and so on. Improvements are required in 4G Long Term Evolution (LTE) networks towards the development of next generation cellular networks for providing very low latency and high reliability. To this end, we present an in-depth analysis of parameters that contribute to the latency in 4G networks along with a description of latency reduction techniques. We implement and validate these latency reduction techniques in the open-source network simulator (NS3) for narrowband user equipment category Cat-Ml (LTE-M) to analyze the improvements. The results presented are a step towards enabling narrowband Ultra Reliable Low Latency Communication (URLLC) networks. Y1 - 2018 SN - 2154-0225 (digital) SS - 2154-0225 (digital) SN - 2154-0217 (Print on Demand) SS - 2154-0217 (Print on Demand) SN - 978-1-5386-5005-9 (digital) SB - 978-1-5386-5005-9 (digital) SN - 978-1-5386-5004-2 (USB) SB - 978-1-5386-5004-2 (USB) SN - 978-1-5386-5006-6 (Print on Demand) SB - 978-1-5386-5006-6 (Print on Demand) U6 - https://dx.doi.org/10.1109/ISWCS.2018.8491085 DO - https://dx.doi.org/10.1109/ISWCS.2018.8491085 SP - 5 S1 - 5 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Amjad, Zubair A1 - Sikora, Axel A1 - Hilt, Benoit A1 - Lauffenburger, Jean-Philippe T1 - Latency Reduction for Narrowband LTE with Semi-Persistent Scheduling T2 - Proceedings of the 4th IEEE International Symposium on Wireless Systems within the International Conferences on Intelligent Data Acquisition and Advanced Computing Systems (IDAACS-SWS), 20-21 September 2018, Lviv, Ukraine N2 - The excessive control signaling in Long Term Evolution networks required for dynamic scheduling impedes the deployment of ultra-reliable low latency applications. Semi-persistent scheduling was originally designed for constant bit-rate voice applications, however, very low control overhead makes it a potential latency reduction technique in Long Term Evolution. In this paper, we investigate resource scheduling in narrowband fourth generation Long Term Evolution networks through Network Simulator (NS3) simulations. The current release of NS3 does not include a semi-persistent scheduler for Long Term Evolution module. Therefore, we developed the semi-persistent scheduling feature in NS3 to evaluate and compare the performance in terms of uplink latency. We evaluate dynamic scheduling and semi-persistent scheduling in order to analyze the impact of resource scheduling methods on up-link latency. Y1 - 2018 SN - 978-1-5386-7587-8 (digital) SB - 978-1-5386-7587-8 (digital) SN - 978-1-5386-9339-1 (Print) SB - 978-1-5386-9339-1 (Print) SN - 978-1-5386-7586-1 (USB) SB - 978-1-5386-7586-1 (USB) SN - 978-1-5386-7588-5 (Print on Demand) SB - 978-1-5386-7588-5 (Print on Demand) U6 - https://dx.doi.org/10.1109/IDAACS-SWS.2018.8525713 DO - https://dx.doi.org/10.1109/IDAACS-SWS.2018.8525713 SP - 196 EP - 198 S1 - 3 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Nsiah, Kofi Atta A1 - Amjad, Zubair A1 - Sikora, Axel A1 - Hilt, Benoît A1 - Lauffenburger, Jean-Philippe T1 - Latency Reduction Techniques for NB-IoT Networks T2 - Proceedings of the 2019 10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS) N2 - Enabling ultra-low latency is one of the major drivers for the development of future cellular networks to support delay sensitive applications including factory automation, autonomous vehicles and tactile internet. Narrowband Internet of Things (NB-IoT) is a 3 rd Generation Partnership Project (3GPP) Release 13 standardized cellular network currently optimized for massive Machine Type Communication (mMTC). To reduce the latency in cellular networks, 3GPP has proposed some latency reduction techniques that include Semi Persistent Scheduling (SPS) and short Transmission Time Interval (sTTI). In this paper, we investigate the potential of adopting both techniques in NB-IoT networks and provide a comprehensive performance evaluation. We firstly analyze these techniques and then implement them in an open-source network simulator (NS3). Simulations are performed with a focus on Cat-NB1 User Equipment (UE) category to evaluate the uplink user-plane latency. Our results show that SPS and sTTI have the potential to greatly reduce the latency in NB-IoT systems. We believe that both techniques can be integrated into NB-IoT systems to position NB-IoT as a preferred technology for low data rate Ultra-Reliable Low-Latency Communication (URLLC) applications before 5G has been fully rolled out. Y1 - 2019 SN - 978-1-7281-4069-8 (digital) SB - 978-1-7281-4069-8 (digital) SN - 978-1-7281-4068-1 (USB) SB - 978-1-7281-4068-1 (USB) SN - 978-1-7281-4070-4 (Print on Demand) SB - 978-1-7281-4070-4 (Print on Demand) U6 - https://dx.doi.org/10.1109/IDAACS.2019.8924238 DO - https://dx.doi.org/10.1109/IDAACS.2019.8924238 N1 - Konferenz: 10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS), 18-21 Sept. 2019, Metz, France SP - 478 EP - 483 S1 - 6 ER -