Change search
Link to record
Permanent link

Direct link
BETA
Alternative names
Publications (10 of 298) Show all publications
Nguyen, V.-G., Grinnemo, K.-J., Taheri, J. & Brunström, A. (2020). A Deployable Containerized 5G Core Solution forTime Critical Communication in Smart Grid. In: : . Paper presented at 23rd Conference on Innovation in Clouds, Internet and Networks (ICIN 2020)February 24-27 Paris, France.
Open this publication in new window or tab >>A Deployable Containerized 5G Core Solution forTime Critical Communication in Smart Grid
2020 (English)Conference paper (Refereed)
National Category
Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-77111 (URN)
Conference
23rd Conference on Innovation in Clouds, Internet and Networks (ICIN 2020)February 24-27 Paris, France
Projects
HITS, 4707
Funder
Knowledge Foundation
Note

Communication within substatation automation systems in a smart grid environment is often time-critical. The time required for exchanging information between intelligent devices should be within a few milliseconds. The International Electrotechnical Commission (IEC) 61850 standard has proposed the Generic Object Oriented Substation Event (GOOSE) protocol to achieve this goal. However, the transmission of GOOSE messages is often limited to a small Local Area Network (LAN). In this demo, we demonstrate the feasibility of using 5G for GOOSEbased time critical communication in a large-scale smart-grid environment, and present a deployable 5G core solution using container-based virtualization technology. The radio part of the demo is emulated. The demo also shows that the delay introduced by the core network is in the order of sub milliseconds, while the one-way delay without a real radio access network is less than 1 ms, which is well below the total delay budget for GOOSE.

Available from: 2020-02-28 Created: 2020-02-28 Last updated: 2020-02-28
Oljira, D. B., Grinnemo, K.-J., Brunström, A. & Taheri, J. (2020). Validating the Sharing Behavior and Latency Characteristics of the L4S Architecture. ACM Digital Library, 50(2)
Open this publication in new window or tab >>Validating the Sharing Behavior and Latency Characteristics of the L4S Architecture
2020 (English)Other (Refereed)
Abstract [en]

The strict low-latency requirements of applications such as virtual reality, online gaming, etc., can not be satisfied by the current internet. This is due to the characteristics of classic TCP such as Reno and TCP Cubic which induce high queuing delays when used for capacity-seeking traffic, which in turn results in unpredictable latency. The Low Latency, Low Loss, Scalable throughput (L4S) architecture addresses this problem by combining scalable congestion controls such as DCTCP and TCP Prague with early congestion signaling from the network. It defines a Dual Queue Coupled (DQC) AQM that isolates low-latency traffic from the queuing delay of classic traffic while ensuring the safe co-existence of scalable and classic flows on the global Internet. In this paper, we benchmarktheDualPI2 scheduler, a reference implementation of DQC AQM, to validate some of the experimental result(s) reported in the previous works that demonstrate the co-existence of scalable and classic congestion controls and its low-latency service. Our results validate the co-existence of scalable and classic flows using DualPI2 Singlequeue (SingleQ) AQM, and queue latency isolation of scalable flows using DualPI2 Dual queue (DualQ) AQM. However, the rate or win-dow fairness between DCTCP without fair-queuing (FQ) pacing and TCP Cubic using DualPI2 DualQ AQM deviates from the original results. We attribute the difference in our results and the original results to the sensitivity of the L4S architecture to traffic bursts and the burst sending pattern of the Linux kernel.

Place, publisher, year, pages
ACM Digital Library, 2020
Keywords
Congestion control, L4S, ECN, Low-latency, Reproducibility
National Category
Computer and Information Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-77494 (URN)
Projects
HITS
Available from: 2020-04-17 Created: 2020-04-17 Last updated: 2020-04-17
Amend, M., Bogenfeld, E., Cvjetkovic, M., Rakocevic, M., Pieskä, M., Kassler, A. & Brunström, A. (2019). A Framework for Multiaccess Support for Unreliable Internet Traffic Using Multipath DCCP. In: Proceedings of the 44th IEEE Conference on Local Computer Networks (LCN), October 14-17, 2019, Osnabrück, Germany: . Paper presented at 44th IEEE Conference on Local Computer Networks (LCN), October 14-17, 2019, Osnabrück, German. IEEE Communications Society
Open this publication in new window or tab >>A Framework for Multiaccess Support for Unreliable Internet Traffic Using Multipath DCCP
Show others...
2019 (English)In: Proceedings of the 44th IEEE Conference on Local Computer Networks (LCN), October 14-17, 2019, Osnabrück, Germany, IEEE Communications Society, 2019Conference paper, Published paper (Refereed)
Abstract [en]

Mobile nodes are typically equipped with multiple radios and can connect to multiple radio access networks (e.g. WiFi, LTE and 5G). Consequently, it is important to design mechanisms that efficiently manage multiple network interfaces for aggregating the capacity, steering of traffic flows or switching flows among multiple interfaces. While such multi-access solutions have the potential to increase the overall traffic throughput and communication reliability, the variable latencies on different access links introduce packet delay variation which has negative effect on the application quality of service and user quality of experience. In this paper, we present a new IP-compatible multipath framework for heterogeneous access networks. The framework uses Multipath Datagram Congestion Control Protocol (MP-DCCP) - a set of extensions to regular DCCP - to enable a transport connection to operate across multiple access networks, simultaneously. We present the design of the new protocol framework and show simulation and experimental testbed results that (1) demonstrate the operation of the new framework, and (2) demonstrate the ability of our solution to manage significant packet delay variation caused by the asymmetry of network paths, by applying pluggable packet scheduling or reordering algorithms.

Place, publisher, year, edition, pages
IEEE Communications Society, 2019
Keywords
Multipath Access, Protocol Design, Scheduling, Delay Variation
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-77386 (URN)10.1109/LCN44214.2019.8990746 (DOI)2-s2.0-85080882892 (Scopus ID)
Conference
44th IEEE Conference on Local Computer Networks (LCN), October 14-17, 2019, Osnabrück, German
Available from: 2020-03-31 Created: 2020-03-31 Last updated: 2020-04-24Bibliographically approved
Mohideen, A. C., Rajiullah, M., Secchi, R., Fairhurst, G., Brunström, A. & Weinrank, F. (2019). Evaluating the impact of transport mechanisms on web performance for effective web access. Journal of Network and Computer Applications, 137, 25-34
Open this publication in new window or tab >>Evaluating the impact of transport mechanisms on web performance for effective web access
Show others...
2019 (English)In: Journal of Network and Computer Applications, ISSN 1084-8045, E-ISSN 1095-8592, Vol. 137, p. 25-34Article in journal (Refereed) Published
Abstract [en]

This paper explores the design trade-offs required for an Internet transport protocol to effectively support web access. It identifies a set of distinct transport mechanisms and explores their use with a focus on multistreaming. The mechanisms are studied using a practical methodology that utilise the range of transport features provided by TCP and SCTP. The results demonstrate the relative benefit of key transport mechanisms and analyse how these impact web access performance. Our conclusions help identify the root causes of performance impairments and suggest appropriate choices guiding the design of a web transport protocol. Performing this analysis at the level of component transport mechanisms enables the results to be utilised in the design of new transport protocols, such as IETF QUIC.

Keywords
Web performance; SCTP; Transport mechanisms
National Category
Communication Systems
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-71847 (URN)10.1016/j.jnca.2019.04.006 (DOI)000470940500003 ()
Available from: 2019-04-16 Created: 2019-04-16 Last updated: 2019-07-02Bibliographically approved
Yedugundla, K., Hurtig, P. & Brunström, A. (2019). Handling Packet Losses in Cloud-Based Application Traffic. In: Proceedings of the 9th International Conference on Cloud Computing and Services Science - Volume 1: CLOSER: . Paper presented at 9th International Conference on Cloud Computing and Services Science, CLOSER 2019 2-4 May, Heraklion, Greece (pp. 111-119). SciTePress
Open this publication in new window or tab >>Handling Packet Losses in Cloud-Based Application Traffic
2019 (English)In: Proceedings of the 9th International Conference on Cloud Computing and Services Science - Volume 1: CLOSER, SciTePress, 2019, p. 111-119Conference paper, Published paper (Refereed)
Abstract [en]

Internet traffic is comprised of data flows from various applications with unique traffic characteristics. For many cloud applications, end-to-end latency is a primary factor affecting the perceived user experience. As packet losses cause delays in the communication they impact user experience, making efficient handling of packet losses an important function of transport layer protocols. Multipath TCP (MPTCP) is a modification to TCP that enables simultaneous use of several paths for a TCP flow. MPTCP is known to improve throughput. However, the performance of MPTCP is not optimal when handling certain loss scenarios. Efficient packet loss recovery is thus important to achieve desirable flow completion times for interactive cloud-based applications. In this paper we evaluate the performance of MPTCP in handling tail losses using traffic traces from various cloud-based applications. Tail losses, losses that occur at the end of a flow or traffic burst, are particularly challenging from a latency perspective as they are difficult to detect and recover in a timely manner. Tail losses in TCP are handled by using a tail loss probe (TLP) mechanism which was adapted to MPTCP from TCP. We investigate the performance of TLP in MPTCP, comparing the standard implementation to a recently proposed, less conservative approach. Our experimental results show that a less conservative implementation of TLP performs significantly better than the standard implementation in handling tail losses, reducing the average burst completion time of cloud based applications when tail loss occurs by up to 50% in certain cases.

Place, publisher, year, edition, pages
SciTePress, 2019
Keywords
Multipath TCP, Cloud Applications, Latency, Loss Recovery, Performance Evaluation, Measurements.
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-70749 (URN)10.5220/0007723801110119 (DOI)2-s2.0-85067484825 (Scopus ID)978-989-758-365-0 (ISBN)
Conference
9th International Conference on Cloud Computing and Services Science, CLOSER 2019 2-4 May, Heraklion, Greece
Available from: 2019-02-20 Created: 2019-02-20 Last updated: 2019-07-10Bibliographically approved
Abbas, M. T., Eklund, J., Grinnemo, K.-J. & Brunström, A. (2019). Impact of Tunable Parameters in NB-IoT Stack onthe Energy Consumption. In: Proceedings of Fifteenth Swedish National Computer Networking Workshop (SNCNW): . Paper presented at 15th Swedish National Computer Networking Workshop (SNCNW 2019). Luleå, June 4-5, 2019..
Open this publication in new window or tab >>Impact of Tunable Parameters in NB-IoT Stack onthe Energy Consumption
2019 (English)In: Proceedings of Fifteenth Swedish National Computer Networking Workshop (SNCNW), 2019Conference paper, Published paper (Refereed)
Abstract [en]

This paper studies the impact of tunable parametersin the NB-IoT stack on the energy consumption of a user equipment(UE), e.g., a wireless sensor. NB-IoT is designed to enablemassive machine-type communications for UE while providing abattery lifetime of up to 10 years. To save battery power, most oftime the UE is in dormant state and unreachable. Still, duringthe CONNECTED and IDLE state, correct tuning of criticalparameters, like Discontinuous reception (DRX), and extendedDiscontinuous reception (eDRX), respectively, are essential to savebattery power. Moreover, the DRX and eDRX actions relate tovarious parameters which are needed to be tuned in order toachieve a required UE battery lifetime. The objective of thispaper is to observe the influence of an appropriate tuning ofthese parameters to reduce the risk of an early battery drainage

Keywords
NB-IoT, energy consumption, DRX, eDRX.
National Category
Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-72440 (URN)
Conference
15th Swedish National Computer Networking Workshop (SNCNW 2019). Luleå, June 4-5, 2019.
Projects
HITS; 4707
Funder
Knowledge Foundation
Available from: 2019-06-12 Created: 2019-06-12 Last updated: 2019-07-03Bibliographically approved
Garcia, J., Sundberg, S., Brunström, A. & Beckman, C. (2019). Interactions Between Train Velocity andCellular Link Throughput - An Extensive Study. In: 2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC): . Paper presented at IEEE International Symposium on Personal, Indoor and Mobile Radio Communications 8-11 September 2019 // Istanbul, Turkey.
Open this publication in new window or tab >>Interactions Between Train Velocity andCellular Link Throughput - An Extensive Study
2019 (English)In: 2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2019Conference paper, Published paper (Refereed)
Abstract [en]

Providing reliable internet connectivity to train passengers can be handled with onboard aggregation routers that use multiple external antennas to simultaneously convey user traffic over multiple links. This work studies the operational characteristics of a large-scale deployment of such a system. The examination focuses on how train velocity is associated with achieved link throughput, and how various interaction effects influence the relationship. A large data set collected over three years is analyzed, indicating that there is a systematic association between train velocity and link throughput that varies over the radio conditions and which is also linked to differences between operators.

National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-75833 (URN)10.1109/PIMRC.2019.8904240 (DOI)978-1-5386-8110-7 (ISBN)978-1-5386-8111-4 (ISBN)
Conference
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications 8-11 September 2019 // Istanbul, Turkey
Projects
HITS, 4707
Funder
Knowledge Foundation
Available from: 2019-11-27 Created: 2019-11-27 Last updated: 2019-12-12Bibliographically approved
Ahlgren, B., Grinnemo, K.-J., Arahamsson, H., Brunström, A. & Hurtig, P. (2019). Latency-aware Multipath Scheduling inInformation-centric Networks. In: Proceedings of the Fifteenth Swedish National Computer Networking Workshop (SNCNW), Luleå, Sweden. 4-5 June 2019.: . Paper presented at The Fifteenth Swedish National Computer Networking Workshop (SNCNW), Luleå, Sweden. 4-5 June 2019..
Open this publication in new window or tab >>Latency-aware Multipath Scheduling inInformation-centric Networks
Show others...
2019 (English)In: Proceedings of the Fifteenth Swedish National Computer Networking Workshop (SNCNW), Luleå, Sweden. 4-5 June 2019., 2019Conference paper, Published paper (Refereed)
Abstract [en]

We present the latency-aware multipath schedulerZQTRTT that takes advantage of the multipath opportunities ininformation-centric networking. The goal of the scheduler is touse the (single) lowest latency path for transaction-oriented flows,and use multiple paths for bulk data flows. A new estimatorcalled zero queue time ratio is used for scheduling over multiplepaths. The objective is to distribute the flow over the paths sothat the zero queue time ratio is equal on the paths, that is,so that each path is ‘pushed’ equally hard by the flow withoutcreating unwanted queueing. We make an initial evaluation usingsimulation that shows that the scheduler meets our objectives.

National Category
Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-72439 (URN)
Conference
The Fifteenth Swedish National Computer Networking Workshop (SNCNW), Luleå, Sweden. 4-5 June 2019.
Projects
HITS
Funder
Knowledge Foundation
Available from: 2019-06-12 Created: 2019-06-12 Last updated: 2020-01-20Bibliographically approved
Hurtig, P., Grinnemo, K.-J., Brunström, A., Ferlin, S., Alay, Ö. & Kuhn, N. (2019). Low-Latency Scheduling in MPTCP. IEEE/ACM Transactions on Networking, 1, 302-315, Article ID 8584135.
Open this publication in new window or tab >>Low-Latency Scheduling in MPTCP
Show others...
2019 (English)In: IEEE/ACM Transactions on Networking, ISSN 1063-6692, E-ISSN 1558-2566, Vol. 1, p. 302-315, article id 8584135Article in journal (Refereed) Published
Abstract [en]

The demand for mobile communication is continuously increasing, and mobile devices are now the communication device of choice for many people. To guarantee connectivity and performance, mobile devices are typically equipped with multiple interfaces. To this end, exploiting multiple available interfaces is also a crucial aspect of the upcoming 5G standard for reducing costs, easing network management, and providing a good user experience. Multi-path protocols, such as multi-path TCP (MPTCP), can be used to provide performance optimization through load-balancing and resilience to coverage drops and link failures, however, they do not automatically guarantee better performance. For instance, low-latency communication has been proven hard to achieve when a device has network interfaces with asymmetric capacity and delay (e.g., LTE and WLAN). For multi-path communication, the data scheduler is vital to provide low latency, since it decides over which network interface to send individual data segments. In this paper, we focus on the MPTCP scheduler with the goal of providing a good user experience for latency-sensitive applications when interface quality is asymmetric. After an initial assessment of existing scheduling algorithms, we present two novel scheduling techniques: the block estimation (BLEST) scheduler and the shortest transmission time first (STTF) scheduler. BLEST and STTF are compared with existing schedulers in both emulated and real-world environments and are shown to reduce web object transmission times with up to 51% and provide 45% faster communication for interactive applications, compared with MPTCP's default scheduler.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
asymmetric paths., low-latency, MPTCP, scheduling, Transport protocols, Mobile telecommunication systems, Scheduling algorithms, Wireless telecommunication systems, asymmetric paths, Interactive applications, Low latency, Low-latency communication, Performance optimizations, Real world environments, 5G mobile communication systems
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-71263 (URN)10.1109/TNET.2018.2884791 (DOI)000458851600022 ()2-s2.0-85058877698 (Scopus ID)
Projects
HITS, 4707
Funder
Knowledge Foundation
Available from: 2019-02-21 Created: 2019-02-21 Last updated: 2019-11-07Bibliographically approved
Parichehreh, A., Moosavi, R., Ramachandra, P., Alfredsson, S. & Brunström, A. (2019). LTE as a Road Toward 5G: QoS Analysis in Mobility Scenario Using The Monroe Platform. In: IEEE Wireless Communications and Networking Conference, WCNC: . Paper presented at IEEE Wireless Communications and Networking Conference 15-19 April 2019 // Marrakech, Morocco (pp. 1-7). IEEE
Open this publication in new window or tab >>LTE as a Road Toward 5G: QoS Analysis in Mobility Scenario Using The Monroe Platform
Show others...
2019 (English)In: IEEE Wireless Communications and Networking Conference, WCNC, IEEE, 2019, p. 1-7Conference paper, Published paper (Refereed)
Abstract [en]

Seamless wireless connectivity and low latency com- munication in mobility scenarios are two fundamental require- ments in the fifth generation networks to effectively cover a broader range of use cases such as massive machine type communications and ultra-reliable low-latency communications for new industrial/potential users, as well as enhanced mobile broadband for conventional users.

In this paper, we aim at measuring certain key performance indicators in mobility scenarios, highlighting some practical inefficiencies that require more careful consideration when de- signing and enhancing mobility features of 5G networks. We investigate the round trip time, uplink throughput and the impact of handover interruption time on these metrics. Our results are based on three months experiment campaign in a mix of rural, suburban, and urban environment using the geographically distributed MONROE platform. Based on the observed discrep- ancies between measured and standardized LTE performance, we conclude the paper with a discussion of techniques that may need more attention for mobility scenarios in fifth generation mobile networks.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
5G Networks, Long Term Evolution, Measure- ment Analysis, Handover interruption, Latency
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-72047 (URN)10.1109/WCNC.2019.8885501 (DOI)000519086300058 ()
Conference
IEEE Wireless Communications and Networking Conference 15-19 April 2019 // Marrakech, Morocco
Projects
DigitalWell Research Fas 1, 5465
Funder
Region Värmland
Available from: 2019-05-15 Created: 2019-05-15 Last updated: 2020-04-23Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7311-9334

Search in DiVA

Show all publications