Daniel Camps Mur
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I am currently leading the Ubiquitous Internet Technology Group (UITU) at the I2CAT Foundation. Our group's insterest lies generally in the wireless domain, and especifically on embedding wireless interfaces in devices constrained in power and energy. Thus, 802.15.4, 802.11, 6LoWPAN, CoAP, and in general the Internet of Things (IoT) are technologies we enjoy tinkering with, always with an experimental approach. In addition to IoT we also investigate architectures and algorithms to improve the capacity of mobile communication networks, focusing here on Wi-Fi based access networks and on the application of logically centralized SDN protocols to improve performance and manageability of the wireless access. Previous to working at I2CAT, I was a researcher at NEC Networks Laboratories in Heidelberg, Germany. My work at NEC focused on wireless networks, QoS, and energy efficiency. At NEC I was also involved in standardization for wireless LANs and have contributed both to the Wi-Fi Alliance and to the IEEE 802.11 working group.
If interested you can also check my Google Scholar profile.
Wireless research related to QoS and energy efficiency in Wi-Fi and WiMAX networks:
Anna Tzanakaki, Markos Anastasopoulos, Ignacio Berberana, Dimitris Syrivelis, Paris Flegkas,Thanasis Korakis, Daniel Camps-Mur, Ilker Demirkol, Jesús Gutiérrez, Eckhard Grass, Qing Wei, Emmanouil Pateromichelakis, Nikola Vucic, Albrecht Fehske, Michael Grieger, Michael Eiselt, Jens Bartelt, Gerhard Fettweis, George Lyberopoulos, Eleni Theodoropoulou, and Dimitra Simeonidou, Wireless-Optical Network Convergence: Enabling the 5G Architecture to Support Operational and End-User Services , IEEE Communications Magazine 55, no. 10 (2017): 184-192. link, pdf
Bartelt, J., Vucic, N., Camps-Mur, D., Garcia-Villegas, E., Demirkol, I., Fehske, A., Grieger, M., Tzanakaki, A., Gutiérrez, J., Grass, E. and Lyberopoulos, G. 5G transport network requirements for the next generation fronthaul interface , EURASIP Journal on Wireless Communications and Networking, 2017(1), p.89. link, pdf
Gutiérrez, Jesús, Nebojsa Maletic, Daniel Camps-Mur, Eduard García, Ignacio Berberana, Markos Anastasopoulos, Anna Tzanakaki et al., 5G-XHaul: a converged optical and wireless solution for 5G transport networks., Transactions on Emerging Telecommunications Technologies, January, 2016.link, pdf
D. Camps-Mur, E. Garcia-Villegas, E. Lopez-Aguilera, P. Loureiro, P. Lambert, A. Raissinia, Enabling always on service discovery: Wifi neighbor awareness networking , Wireless Communications, IEEE , vol.22, no.2, pp.118,125, April 2015. link, pdf
A. Garcia-Saavedra, B. Rengarajan, P. Serrano, D. Camps-Mur, X. Costa-Pérez, SOLOR: Self-Optimizing WLANs with Legacy-Compatible Opportunistic Relays , IEEE/ACM Transactions on Networking, accepted for publication, April 2014. pdf
D. Camps Mur, A. Garcia and P. Serrano, Device to device communications with Wi-Fi Direct: overview and experimentation , Wireless Communications Magazine, IEEE , vol.20, no.3, pp.96,104, June 2013.link, pdf
D. Camps Mur, M. Gomony, X. Pérez-Costa, S.Sallent, Leveraging 802.11n Frame Aggregation to enhance QoS and Energy Efficiency in Wi-Fi Networks, Computer Networks, Available online 19 May 2012, ISSN 1389-1286, 10.1016/j.comnet.2012.05.004. link, pdf
D. Camps-Mur, X. Perez-Costa, S. Sallent-Ribes, Designing energy efficient access points with Wi-Fi Direct, Computer Networks, Volume 55, Issue 13, 15 September 2011, Pages 2838-2855, ISSN 1389-1286. link, pdf
A.Zubow, D. Camps, X. Perez, P. Favaro. Greedy Scheduling Algorithm (GSA). Design an Evaluation of an Efficient and Flexible WiMAX OFDMA Scheduling Solution. Computer Networks, Volume 54, Issue 10, 1 July 2010, Pages 1584-1606, ISSN 1389-1286. link, pdf
D. Camps Mur, X. Perez-Costa, V. Marchenko, S. Sallent Ribes. On Centralized Schedulers for 802.11e WLANs: Distribution vs Grouping of Resources Allocation, Wiley Wireless Communications and Mobile Computing Journal, 28 December 2010. link, pdf
D. Camps Mur, X. Perez-Costa, S. Sallent Ribes, An Adaptive Solution for Wireless LAN Distributed Power Saving Modes, Computer Networks, Volume 53, Issue 18, 24 December 2009, Pages 3011-3030, ISSN 1389-1286. link, pdf
X.Pérez-Costa, D.Camps-Mur and Albert Vidal. On the Distributed Power Saving Mechanisms of Wireless LANs 802.11e U-APSD vs 802.11 Power Save Mode. Computer Networks, Volume 51, Issue 9, (1) Advances in Smart Cards and (2) Topics in Wireless Broadband Systems, 20 June 2007, Pages 2326-2344, ISSN 1389-1286. link, pdf
X.Pérez-Costa, D.Camps-Mur and T.Sashihara. Analysis of the Integration of IEEE 802.11e Capabilities in Battery Limited Mobile Devices. IEEE Wireless Communications Magazine (WirComMag), special issue on Internetworking Wireless LAN and Cellular Networks, Volume 12, Issue 6, December 2005. link, pdf
Dimitris Giatsios, Kostas Choumas, Paris Flegkas, Thanasis Korakis, Joan Josep Aleixendri Cruelles, and Daniel Camps-Mur Design and evaluation of a hierarchical SDN control plane for 5G transport networks IEEE ICC 2019, Shanghai, China. pdf
Joan Josep Aleixendr, August Betzler, and Daniel Camps-Mur A practical approach to slicing Wi-Fi RANs in future 5G networks IEEE WCNC 2019, Marrachech. pdf
G. Lyberopoulos, E. Theodoropoulou, I. Mesogiti, K. Filis, R. Canto Palacar, N.A. Serrano, D. Camps-Mur, and J. Terran Gutierrez. Network Services SLAs over 5G Infrastructure Converging Disaggregated Network and Compute Resources IEEE CAMAD 2018, Barcelona. pdf
Grandi, M., Camps-Mur, D., Betzler, A., Aleixendri, J. J., and Catalan-Cid, M. SWAM: SDN-based Wi-Fi Small Cells with Joint Access-Backhaul and Multi-Tenant Capabilities. IEEE/ACM IWQoS, Canada, 2018. Poster versionFull version
D. Giatsios, K. Choumas, P. Flegkas, T. Korakis, D. Camps-Mur SDN Implementation of Slicing and Fast Failover in 5G Transport Networks European Conference on Networks and Communications (EuCNC), Oulu, 2017. pdf
I. Demirkol, D. Camps-Mur, J. Bartelt, J. Zou 5G Transport Network Blueprint and Dimensioning for a Dense Urban Scenario European Conference on Networks and Communications (EuCNC), Oulu, 2017. pdf
E. Garcia-Villegas, D. Sesto-Castilla, S. Zehl, A. Zubow, A. Betzler, D. Camps-Mur SENSEFUL: an SDN-based Joint Access and Backhaul Coordination for Dense Wi-Fi Small Cells IWCMC 2017, Valencia, 2017. pdf
S. Surroca, D. Camps-Mur, I. Demirkol Addressing the eduroam inter-domain mobility problem through virtual APs IWCMC 2017, Valencia, 2017. pdf
D. Camps-Mur, P. Flegkas, D. Syrivelis, Q. Wei, J. Gutierrez 5G-XHaul: Enabling scalable virtualization for future 5G Transport Networks IUCC 2016, En2ESO Workshop, Granada, Spain, December 2016. pdf.
August Betzler, Ferran Quer, Daniel Camps-Mur, Ilker Demirkol, and Eduard Garcia-Villegas, On the Benefits of Wireless SDN in Networks of Constrained Edge Devices European Conference on Networking and Communications (EuCNC), Athens, June, 2016. link, pdf.
A. Tzanakaki, M. Anastasopoulos, D. Simeonidou, I. Berberana, D. Syrivelis, T. Korakis, P. Flegkas, D. Camps Mur, I. Demirkol, J. Gutiérrez, E. Grass, Q. Wei, E. Pateromichelakis, A. Fehske, M. Grieger , M. Eiselt, J. Bartelt, G. Lyberopoulos, E. Theodoropoulou, 5G Infrastructures Supporting End-User and Operational Services: The 5G-XHaul Architectural Perspective IEEE International Conference on Communications Workshops (ICC) 2016 May 23 (pp. 57-62). link, pdf.
M.S. Afaqui, E. Garcia-Villegas, E. Lopez-Aguilera, D. Camps-Mur, Dynamic Sensitivity Control of Access Points for IEEE 802.11ax. IEEE International Conference on Communications (ICC) 2016 May 22 (pp. 1-7). link, pdf.
J. Ferrandiz-Lahuerta, D. Camps-Mur, and J. Paradells-Aspas, A reliable asynchronous protocol for VLC communications based on the rolling shutter effect IEEE Global Communications Conference (GLOBECOM) 2015 Dec 6 (pp. 1-6). link, pdf.
A. Hurtado-Borras, J. Pala-Sole, D. Camps-Mur and S. Sallent-Ribes, SDN wireless backhauling for Small Cells Communications (ICC), 2015 IEEE International Conference on, London, 2015, pp. 3897-3902. link, pdf.
M.S. Afaqui, E. Garcia-Villegas, E. Lopez-Aguilera, G. Smith, D. Camps Mur, Evaluation of dynamic sensitivity control algorithm for IEEE 802.11ax. Wireless Communications and Networking Conference (WCNC), 2015 IEEE , vol., no., pp.1060,1065, 9-12 March 2015 link, pdf.
P. Garfias, S. Sallent, L. Gutierrez, D. Camps-Mur. Real-Time Services in EPON. In Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper JTh2A.26. link, pdf
X. Pérez-Costa, P. Favaro, A. Zubow, D. Camps-Mur and J. Arauz. On the Challenges for the Maximization of Radio Resources Usage in WiMAX Networks. In Proceedings of IEEE CCNC Broadband Wireless Access (BWA), Las Vegas, USA, January 2008. link, pdf
X. Pérez-Costa and D. Camps Mur. A Protocol Enhancement for IEEE 802.11 Distributed Power Saving Mechanisms: No Data Acknowledgment. IST Mobile Summit 2007 Conference, Budapest, Hungary, July 2007.link, pdf
X.Pérez-Costa, D.Camps-Mur, J. Palau, D. Rebolleda and S. Akbarzadeh. OAS-APSD: Design and Evaluation of an Overlapping Aware Scheduled Automatic Power Save Delivery Algorithm. In Proceedings of In Proceedings of European Wireless Conference (EW), Paris, France, April 2007. pdf
X.Pérez-Costa and D.Camps-Mur. AU-APSD: Adaptive IEEE 802.11e Unscheduled Automatic Power Save Delivery. In Proceedings of IEEE International Conference on Communications (ICC), Istanbul, Turkey, June 2006. link, pdf
X.Pérez-Costa, A.Vidal and D.Camps-Mur. SU-APSD: Static IEEE 802.11e Unscheduled Automatic Power Save Delivery. European Wireless Conference (EW), Athens, Greece, April 2006. pdf
X.Pérez-Costa and D.Camps-Mur.APSM: Bounding the Downlink Delay for 802.11 Power Save Mode. In Proceedings of IEEE International Conference on Communications (ICC), Seoul, Korea, May 2005. link, pdf
J. Arauz, P. Favaro, D. Camps-Mur and X. Pérez-Costa. Research Challenges in Multimedia WiMAX. Handbook of Research on Mobile Multimedia, Second Edition. IGI Global, 2009. 36-50. Web. 28 Aug. 2011. link, pdf
Punz, G., D. Camps-Mur, and Konstantinos Samdanis.Energy Saving Standardisation in Mobile and Wireless Communication Systems.. Green Communications: Principles, Concepts and Practice (2015): 237-256. link, pdf
5G-XHaul (Dynamically Reconfigurable Optical-Wireless Backhaul/Fronthaul with Cognitive Control Plane for Small Cells and Cloud-RANs). 5G-XHaul is a project that investigates the design of transport networks for 5G mobile networks. The main areas investigated in the project are: Wireless backhauling using a combination of Sub6 and mmWave technologies, optical transport based on WDM-PON and reconfigurable active optical networks based on TSON, RAN functional splits to enable massive-MIMO in an scalable way, and an SDN control plane to orchestrate wireless and optical transport technologies. Our work on this project focuses on SDN control for the wireless Small Cell backhaul. I am the Technical Manager (TM) of 5G-XHaul. More information on the project can be found here: 5G-XHaul. This projects belongs to the 5GPPP program sponsored by the European Commission.
SESAME (Small Cell Coordination for Multi-Tenancy and Edge Services). SESAME investigates architecture to enable the concept of Small Cell as a Service (SCaaS) in 5G networks. Our work in the project focuses on enabling virtualization in the wireless Small Cell backhaul, and in the Small Cells based on 802.11 technologies. More information on the project can be found here: SESAME. This projects belongs to the 5GPPP program sponsored by the European Commission.
WISHFUL (Wireless Software and Hardware platforms for Flexible and Unified radio and network controL). We participated in WISHFUL through an open call. In WISHFUL we investigated an SDN architecture for joint control of access and backhaul wireless networks of Small Cells. In particular an access controller, and a backhaul controller communicated through an API defined in the project. More information on the project can be found here: WISHFUL.
FLEX (FIRE LTE testbeds for open EXperimentation). We participated in FLEX through an open call. In FLEX we added GTP support to a software SDN switch, and demonstrated how this feature can be applied in wireless backhaul networks of Small Cells. More information on the project can be found here: FLEX.
Since 2004 I have been involved in a long running project aimed at optimizing the QoS and energy efficiency of the Wi-Fi chipsets embedded in several NEC Wi-Fi dual mode terminals. In particular our work was related to the N900iL, N902iL and N906iL NEC mobile phones.
I was also part of the team that developed enhanced QoS and MAP schedulers for NEC's WiMAX Base Stations. NEC's WiMAX Base Stations implement our proposed scheduling algorithms.
I have contributed to standardization efforts for wireless LANs both in the Wi-Fi Alliance , and in the IEEE 802.11 task group where I hold voting rights . In particular my main contributions have been in the following groups:
Wi-Fi Direct: Wi-Fi Direct is a new technology developed by the Wi-Fi Alliance that allows two or more devices to establish a Wi-Fi network without the presence of an Access Point. The Wi-Fi Direct technology is based on the concept of SoftAPs. Wi-Fi Direct is described in the P2P specification that can be retrieved from here . In addition, a good white paper giving an overview of the technology can be found here.
WMM (Wi-Fi Multimedia): WMM is the Wi-Fi Alliance flavor of the IEEE 802.11e QoS standard, that developed enhanced QoS and power saving mechanisms for Wi-Fi networks. My contributions to WMM were in the area of forwarding rules for WMM devices, and in the area of power saving protocols for management frames. The WMM spec is available here .
OPNET Significant Technical Challenge solved, link
My research has resulted so far in ten patent applications, two already granted, in the area of QoS and energy efficiency for wireless networks. A detailed list can be found here.
Here you can find several things that I have found useful during my research:
Intel's 802.11n OPNET model. This is an excellent OPNET process model developed to support the validation efforts of the IEEE TGn group during the downselection process of contending proposals. You need an OPNET account to download it though. I extended this model for my research on 802.11n here.
The Eurane project developed a set of tools to simulate 3G networks. I used the Matlab models provided by Eurane together with NS3 in order to create an HSDPA channel emulator that was integrated in a testbed to test the AP power saving algorithms for Wi-Fi Direct proposed here. A good tutorial on how to integrate NS3 within your testbed can be found here.
Anything related to wireless networking in Linux can be found in LinuxWireless. A good introduction to the Linux wireless subsystem can be found here. Also, here you have some dirty notes from myself on the mac80211/ath9k/ath5k interactions, use them at your own risk!
mac80211_hwsim is a truly remarkable wireless channel emulator for Linux. It loads as a module in the kernel, and it allows you to specify an arbitrary number of virtual wireless interfaces that your system will see as regular interfaces. It is a great tool to test upper MAC features in Wi-Fi, for instance Wi-Fi Direct or open80211s. Indeed, the open80211s project has developed a very interesting tool called wmediumd that provides a graphical interface on top of mac80211_hwsim to allow you to emulate and test your own 802.11s mesh networks.
Contributions made to the IEEE 802.11 working group are hosted in Mentor that is an open server. If you want to see what is going on in any 802.11 group you can take a look here
I like to play around with my home network. Here you can find some notes about my experiences enabling QoS in my home network.
Here you can find a list of IMHO interesting research articles about wireless and networking that I have recently read:
Zhen Wei Zhao, Y. C. Tay, A model for calculating channel share of 802.11 access points with overlapping wireless cells, Wireless Networks (19 July 2011), pp. 1-13. link.
Overlapping BSS is a very important problem in Wi-Fi that will even become more relevant in the future with the increased channel bandwidths used in 802.11ac. This paper presents a distributed algorithm that based on a set of SINR readings allows overlapping APs to compute their share of wireless bandwidth. Such an algorithm could have applications in smart channel selection algorithms.
Che-Jung Hsu, Huey-Ing Liu, Winston K.G Seah, Opportunistic routing - A review and the challenges ahead, Computer Networks, In Press, Accepted Manuscript, Available online 13 July 2011. link.
Opportunistic Routing is a fairly new routing paradigm that uses the inherent broadcast nature of the wireless channel to improve performance of wireless multihop networks. This paper provides a well presented overview of the current state of the art in this area.
Alexander Afanasyev, Neil Tilley, Peter Reiher, and Leonard Kleinrock, Host-to-Host Congestion Control for TCP. Communications Surveys & Tutorials, IEEE, Third Quarter 2010, Volume: 12 Issue: 3, pp. 304-342. link
I would call this paper the bible of all TCP flavors ever designed. Amazing survey!
Binbin Chen, Ziling Zhou, Yuda Zhao, Haifeng Yu, Efficient Error Estimating Coding: Feasibility and Applications, In Proceedings of the ACM SIGCOMM 2010. link.
This papers introduces the novel concept of Error Estimating Codes (EEC). Instead of traditional Error Correcting Codes (ECC), EEC allow a receiver to estimate, with very low overhead, the fraction of bits that are in error in a received packet, i.e. the BER. The paper then demonstrates some applications of EEC like Link Adaptation and multihop real-time video streaming with Forward Error Correction.
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