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Chen, Zheng
Publications (2 of 2) Show all publications
Pappas, N., Chen, Z. & Dimitriou, I. (2018). Throughput and Delay Analysis of Wireless Caching Helper Systems with Random Availability. IEEE Access, 6, 9667-9678
Open this publication in new window or tab >>Throughput and Delay Analysis of Wireless Caching Helper Systems with Random Availability
2018 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 6, p. 9667-9678Article in journal (Refereed) Published
Abstract [en]

In this paper, we investigate the effect of bursty traffic and random availability of caching helpers in a wireless caching system. More explicitly, we consider a general system consisting of a caching helper with its dedicated user in proximity and another non-dedicated user requesting for content. Both the non-dedicated user and the helper have limited storage capabilities. When the user is not able to locate the requested content in its own cache, then its request shall be served either by the caching helper or by a large data center. Assuming bursty request arrivals at the caching helper from its dedicated destination, its availability to serve other users is affected by the request rate, which will further affect the system throughput and the delay experienced by the non-dedicated user. We characterize the maximum weighted throughput and the average delay per packet of the considered system, taking into account the request arrival rate of the caching helper, the request probability of the user and the availability of the data center. Our results provide fundamental insights in the throughput and delay behavior of such systems, which are essential for further investigation in larger topologies. 

Place, publisher, year, edition, pages
IEEE, 2018
National Category
Communication Systems Telecommunications
Identifiers
urn:nbn:se:liu:diva-144837 (URN)10.1109/ACCESS.2018.2801246 (DOI)000427870400001 ()
Funder
ELLIIT - The Linköping‐Lund Initiative on IT and Mobile CommunicationsEU, Horizon 2020, 645705
Note

Funding agencies: EU project DECADE [H2020-MSCA-2014-RISE: 645705]; European Unions Horizon research and innovation programme; Swedish Foundation for Strategic Research (SSF); Swedish Research Council; ELLIIT; CENIIT

Available from: 2018-02-01 Created: 2018-02-01 Last updated: 2018-04-11
Chen, B., Chen, Z., Pappas, N., Yuan, D. & Zhang, J. (2017). Modeling and Analysis of MPTCP Proxy-based LTE-WLAN Path Aggregation. In: 2017 IEEE Global Communications Conference (GLOBECOM), Proceedings Singapore 4 – 8 December 2017: . Paper presented at IEEE Global Communications Conference (GLOBECOM), Singapore, December 4-8, 2017 (pp. 1-7). IEEE Communications Society
Open this publication in new window or tab >>Modeling and Analysis of MPTCP Proxy-based LTE-WLAN Path Aggregation
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2017 (English)In: 2017 IEEE Global Communications Conference (GLOBECOM), Proceedings Singapore 4 – 8 December 2017, IEEE Communications Society, 2017, p. 1-7Conference paper, Published paper (Refereed)
Abstract [en]

Long Term Evolution (LTE)-Wireless Local Area Network (WLAN) Path Aggregation (LWPA) based on Multi- path Transmission Control Protocol (MPTCP) has been under standardization procedure as a promising and cost-efficient solution to boost Downlink (DL) data rate and handle the rapidly increasing data traffic. This paper aims at providing tractable analysis for the DL performance evaluation of large-scale LWPA networks with the help of tools from stochastic geometry. We consider a simple yet practical model to determine under which conditions a native WLAN Access Point (AP) will work under LWPA mode to help increasing the received data rate. Using stochastic spatial models for the distribution of WLAN APs and LTE Base Stations (BSs), we analyze the density of active LWPA- mode WiFi APs in the considered network model, which further leads to closed-form expressions on the DL data rate and area spectral efficiency (ASE) improvement. Our numerical results illustrate the impact of different network parameters on the performance of LWPA networks, which can be useful for further performance optimization. 

Place, publisher, year, edition, pages
IEEE Communications Society, 2017
Keywords
LTE, WiFi, Path Aggregation, MPTCP, Stochastic Geometry
National Category
Communication Systems Telecommunications
Identifiers
urn:nbn:se:liu:diva-140159 (URN)10.1109/GLOCOM.2017.8254058 (DOI)000428054300138 ()9781509050192 (ISBN)9781509050208 (ISBN)
Conference
IEEE Global Communications Conference (GLOBECOM), Singapore, December 4-8, 2017
Projects
DECADE (Deploying High Capacity Dense Small Cell Heterogeneous Networks)
Funder
EU, Horizon 2020
Note

Funding agencies: This work was supported in part by the Swedish Foundation for Strategic Research (SSF), the Swedish Research Council (VR), ELLIIT, the joint research project DECADE (Deploying High Capacity Dense Small Cell Heterogeneous Networks), within the Research and Innovation Staff Exchange (RISE) scheme of the European Horizon 2020 Framework Program, under contract number 645705.

Available from: 2017-09-01 Created: 2017-09-01 Last updated: 2019-05-10Bibliographically approved
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