Publications
1.
Hung, S. C.; Zhang, X.; Festag, A.; Chen, K. C.; Fettweis, G.
Vehicle-Centric Network Association in Heterogeneous Vehicle-to-Vehicle Networks Journal Article
In: IEEE Transactions on Vehicular Technology, vol. 68, no. 6, pp. 5981-5996, 2019.
Abstract | Links | BibTeX | Tags: Cooperative ITS, handover, Intelligent Transport Systems, optimization, V2X communication
@article{Hung:TransVehTechn:2019,
title = {Vehicle-Centric Network Association in Heterogeneous Vehicle-to-Vehicle Networks},
author = {S. C. Hung and X. Zhang and A. Festag and K. C. Chen and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/8686054},
doi = {10.1109/TVT.2019.2910324},
year = {2019},
date = {2019-04-11},
urldate = {2019-04-11},
journal = {IEEE Transactions on Vehicular Technology},
volume = {68},
number = {6},
pages = {5981-5996},
abstract = {Safe and reliable operation of future autonomous vehicles requires ultra-low latency vehicle-to-vehicle (V2V) networking. However, due to scalability issues of purely ad hoc network, vehicle-to-infrastructure (V2I) communication is still in demand. To avoid interference between V2V and V2I communications, conventional network association such as handover may generate a large amount of control and signaling overhead, especially in environments with high-speed mobility and small-coverage access points. Taking the additional latency caused by the overhead into consideration, a vehicle-centric approach is proposed to guarantee the low-latency requirements of the V2V networks. Different from solely optimizing the latency performance, the proposed approach focuses on effectively operating the network association and resources re-allocation. This avoids the massive exchange of control information and signaling and reduces its impact on latency. The proposed framework for V2V networking can underlay different virtual cells with a constrained network association rate and we can derive the corresponding upper bound of the latency performance. Analysis and simulation results indicate that our scheme successfully guarantees the upper bound of the latency and simultaneously constrains the network association rate, thus limiting the additional control exchange and signaling overhead.},
keywords = {Cooperative ITS, handover, Intelligent Transport Systems, optimization, V2X communication},
pubstate = {published},
tppubtype = {article}
}
Safe and reliable operation of future autonomous vehicles requires ultra-low latency vehicle-to-vehicle (V2V) networking. However, due to scalability issues of purely ad hoc network, vehicle-to-infrastructure (V2I) communication is still in demand. To avoid interference between V2V and V2I communications, conventional network association such as handover may generate a large amount of control and signaling overhead, especially in environments with high-speed mobility and small-coverage access points. Taking the additional latency caused by the overhead into consideration, a vehicle-centric approach is proposed to guarantee the low-latency requirements of the V2V networks. Different from solely optimizing the latency performance, the proposed approach focuses on effectively operating the network association and resources re-allocation. This avoids the massive exchange of control information and signaling and reduces its impact on latency. The proposed framework for V2V networking can underlay different virtual cells with a constrained network association rate and we can derive the corresponding upper bound of the latency performance. Analysis and simulation results indicate that our scheme successfully guarantees the upper bound of the latency and simultaneously constrains the network association rate, thus limiting the additional control exchange and signaling overhead.
2.
Hung, S. C.; Zhang, X.; Festag, A.; Chen, K. C.; Fettweis, G.
Virtual Cells and Virtual Networks Enable Low-Latency Vehicle-to-Vehicle Communication Proceedings Article
In: IEEE Global Communications Conference (Globecom), Singapore, 2017.
Abstract | Links | BibTeX | Tags: handover, optimization, V2X communication
@inproceedings{Hung:GLOBECOM:2017,
title = {Virtual Cells and Virtual Networks Enable Low-Latency Vehicle-to-Vehicle Communication},
author = {S. C. Hung and X. Zhang and A. Festag and K. C. Chen and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/8254616},
doi = {10.1109/GLOCOM.2017.8254616},
year = {2017},
date = {2017-12-04},
urldate = {2018-01-15},
booktitle = {IEEE Global Communications Conference (Globecom)},
address = {Singapore},
abstract = {This paper presents a framework for pursuing lowlatency communication among V2V networks underlaying V2I networks. To achieve low-latency communication, solely relying on the improvement of the air-interface may not be enough. To cope with the highly dynamic environment of vehicular networks, a time dynamic optimization approach is proposed that improves the latency performance through not only optimization of spectrum resources but also by constraining the network switching rate. To further decrease the complexity of the time dynamic optimization problem, we convert the original problem to a deterministic optimization problem through the Lyapunov Optimization Theory. The proposed algorithm becomes a more suitable scheme for the vehicular network. Analytical results show that the proposed scheme can approach the best tradeoff between the latency performance and the network switching rate. Simulation results are provided to verify the proposed algorithm.},
keywords = {handover, optimization, V2X communication},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper presents a framework for pursuing lowlatency communication among V2V networks underlaying V2I networks. To achieve low-latency communication, solely relying on the improvement of the air-interface may not be enough. To cope with the highly dynamic environment of vehicular networks, a time dynamic optimization approach is proposed that improves the latency performance through not only optimization of spectrum resources but also by constraining the network switching rate. To further decrease the complexity of the time dynamic optimization problem, we convert the original problem to a deterministic optimization problem through the Lyapunov Optimization Theory. The proposed algorithm becomes a more suitable scheme for the vehicular network. Analytical results show that the proposed scheme can approach the best tradeoff between the latency performance and the network switching rate. Simulation results are provided to verify the proposed algorithm.
3.
Fu, X.; Chen, T.; Festag, A.; Karl, H.; Schäfer, G.; Fan, C.
Secure, QoS-enabled Mobility Support for IP-based Networks Proceedings Article
In: IP Based Cellular Network Conference (IPCN), Paris, France, 2003.
Abstract | Links | BibTeX | Tags: handover, mobile communication
@inproceedings{Fu:IPCN:2003,
title = {Secure, QoS-enabled Mobility Support for IP-based Networks},
author = {X. Fu and T. Chen and A. Festag and H. Karl and G. Schäfer and C. Fan},
url = {https://festag-net.de/wp-content/uploads/2003_Fu_ICPN.pdf},
year = {2003},
date = {2003-05-24},
urldate = {2003-05-24},
booktitle = {IP Based Cellular Network Conference (IPCN)},
address = {Paris, France},
abstract = {Abstract-The rising number of mobile users, the advent of various radio access technologies, and the increasing importance of IP services over wireless as well as wired networks pose a number of new challenges. While Mobile IP has been designed for mobility management in IP networks, it may result in high latency and signaling overhead during handoff. Thus, advanced mobility mechanisms improving Mobile IP are desired to perform efficient handoffs. Also, appropriate Quality-of-Service (QoS) support is needed for mobility-enhanced IP in order to meet end users' expectations. Furthermore, security measures are required to protect the network infrastructure. This paper describes the Secure, QoS-enabled Mobility (SeQoMo) architecture addressing these issues. In particular, optimization of handoff operations, low-latency QoS re-establishment for IP-level handoff, authentication, and QoS-aware authorization for mobile nodes are investigated and integrated in a unified framework. We also describe how the SeQoMo architecture as a whole supports efficient handoff processing especially during local movements, with optimized QoS support and authentication and QoS-aware authorization services.},
keywords = {handover, mobile communication},
pubstate = {published},
tppubtype = {inproceedings}
}
Abstract-The rising number of mobile users, the advent of various radio access technologies, and the increasing importance of IP services over wireless as well as wired networks pose a number of new challenges. While Mobile IP has been designed for mobility management in IP networks, it may result in high latency and signaling overhead during handoff. Thus, advanced mobility mechanisms improving Mobile IP are desired to perform efficient handoffs. Also, appropriate Quality-of-Service (QoS) support is needed for mobility-enhanced IP in order to meet end users' expectations. Furthermore, security measures are required to protect the network infrastructure. This paper describes the Secure, QoS-enabled Mobility (SeQoMo) architecture addressing these issues. In particular, optimization of handoff operations, low-latency QoS re-establishment for IP-level handoff, authentication, and QoS-aware authorization for mobile nodes are investigated and integrated in a unified framework. We also describe how the SeQoMo architecture as a whole supports efficient handoff processing especially during local movements, with optimized QoS support and authentication and QoS-aware authorization services.