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DERA: Augmented random access for cellular networks with dense H2H-MTC mixed traffic
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Radio Systems Laboratory (RS Lab).
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Radio Systems Laboratory (RS Lab).
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Radio Systems Laboratory (RS Lab).
2017 (English)In: 2016 IEEE Globecom Workshops, GC Wkshps 2016 - Proceedings, 2017, 7848874Conference paper, Published paper (Refereed)
Abstract [en]

In addition to the Mobile Broadband (MBB) services, future cellular networks will need to cope with a range of new "Internet of things" (IoT) services. LTE-Advanced and future generation cellular technologies should support both service sets within one network in order to keep the service costs and deployment expenses low. Massive IoT services require much less bandwidth than the MBB services, but the network need to serve a massive number of devices in each cell. The IoT applications put stringent demands on the service reliability and energy efficiency, and some will require very low delay. The existing random access (RA) procedures of cellular networks are not really designed for large numbers of terminals, which may result in excessive collisions, and hence, link delay and waste of precious battery energy. The present work aims at solving this problem by proposing a novel delay-estimation based random access scheme that improves the resolution mechanism of the conventional RA procedure in order to lower delay and energy consumption. The performance evaluation results show that the proposed scheme can significantly reduce the access delay in densely deployed scenarios.

Place, publisher, year, edition, pages
2017. 7848874
Keyword [en]
5G, Collision, LTE-A, M2M, Propagation delay, RA contention, RACH
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-208121DOI: 10.1109/GLOCOMW.2016.7848874ISI: 000401921400076Scopus ID: 2-s2.0-85015881718ISBN: 9781509024827 (print)OAI: oai:DiVA.org:kth-208121DiVA: diva2:1107345
Conference
2016 IEEE Globecom Workshops, GC Wkshps 2016, Washington, United States, 4 December 2016 through 8 December 2016
Note

QC 20170609

Available from: 2017-06-09 Created: 2017-06-09 Last updated: 2017-10-02Bibliographically approved
In thesis
1. Designing Efficient Access Control to Comply Massive-Multiservice IoT over Cellular Networks
Open this publication in new window or tab >>Designing Efficient Access Control to Comply Massive-Multiservice IoT over Cellular Networks
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Internet of Things (IoT) has come in reality to improve our living quality. Automation is embraced in all the possible business verticals that have diverse communication needs ranged from static devices’ sporadic transmission to mobile devices’ every minute transmission. Despite, there are many technologies available today to support IoT services; cellular systems can play a vital role for IoT services, like wearables, vehicular, and industrial IoT, rollout which have either mobility or security concern. 

IoT services generated traffic are foreseen as a sporadic-bursty traffic. As the cellular networks are designed to serve continuous data traffic, the existing system’s access control mechanism cannot efficiently conform to the burstiness of traffic. This limits the scope of the network scalability in terms of simultaneous serving devices’ capacity. Also, this bursty pattern can extensively increase the rate of network’s congestion incident. In this thesis, we focus on these underlying challenges to support a large number of heterogeneous IoT services with existing services over the same radio network. An important question for supporting IoT services over cellular networks is how detrimental are the effects of IoT services on other services of cellular networks. This dissertation seeks to answer this with quantitative results to indicate the real constraints of existing networks.

An important conclusion is that existing cellular system is incompetent to support the bursty arrival of massive IoT devices in terms of radio networks’ access control plane’s scalability. Therefore, this dissertation presents solutions to overcome the identified limitations of access control planes. To improve the performance of the access control plane, we incorporate a vertical core network controlled group management scheme that can assure the operator’s granular control over capillary gateways. Besides, this introduces a unique handover opportunity between cellular and capillary network vertices. Then, we present a simple but efficient initial access mechanism to overcome the initial access collision at the very early stage. Finally, we show the impact of access collision and retransmission on the initial access resource dimensioning.We present a practical traffic model that is realistic for the traffic scenario for mixed-traffic. Our presented results and analysis depict the trade-offs between access rate, retransmission and resource allocation over time and frequency.Our results reveal that with proposed schemes of the cellular system’s access control plane can be scalable and resilient to accommodate a large number of IoT devices without incurring extra delay or need of resources to the system.

Place, publisher, year, edition, pages
Stockholm: Kungliga Tekniska högskolan, 2017. 67 p.
Series
TRITA-ICT, 2017:18
National Category
Communication Systems
Research subject
Information and Communication Technology
Identifiers
urn:nbn:se:kth:diva-214974 (URN)978-91-7729-547-1 (ISBN)
Presentation
2017-11-10, Sal A (Sal östen Mäkitalo), Kungl Tekniska högskolan, Kistagången 16, Kista, Stockholm, 11:00 (English)
Opponent
Supervisors
Note

QC 20170928

Available from: 2017-10-02 Created: 2017-09-27 Last updated: 2017-10-04Bibliographically approved

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