A5040049089- IoT and Edge/Fog Computing
- Wireless Networks and Protocols
- Software-Defined Networks and 5G
- Advanced MIMO Systems Optimization
- Network Traffic and Congestion Control
- Energy Efficient Wireless Sensor Networks
- Cloud Computing and Resource Management
- Telecommunications and Broadcasting Technologies
- Blockchain Technology Applications and Security
- Cooperative Communication and Network Coding
- Mobile Ad Hoc Networks
- Smart Grid Security and Resilience
- Smart Grid Energy Management
- Software System Performance and Reliability
- IoT Networks and Protocols
- Energy Harvesting in Wireless Networks
- Multimedia Communication and Technology
- IPv6, Mobility, Handover, Networks, Security
- Opportunistic and Delay-Tolerant Networks
- Optical Network Technologies
- Image and Video Quality Assessment
- Molecular Communication and Nanonetworks
- Scientific Computing and Data Management
- PAPR reduction in OFDM
- ICT in Developing Communities
i2CAT
2015-2024
National Statistical Institute of Portugal
2022
Universitat Politècnica de Catalunya
2013-2016
University of the Basque Country
2016
Fundació ACE
2014
The Constrained Application Protocol (CoAP) is a lightweight RESTful application layer protocol devised for the Internet of Things (IoT).Operating on top UDP, CoAP must handle congestion control by itself.The core specification defines basic mechanism, which however not capable adapting to network conditions.Yet, IoT scenarios exhibit significant resource constraints pose new challenges design mechanisms.In this paper we present Simple Congestion Control/Advanced (CoCoA), an advanced...
The 5G network solutions currently standardised and deployed do not yet enable the full potential of pervasive networking computing envisioned in initial visions: services slices with different QoS profiles span multiple operators; security, trust automation is limited. evolution towards a truly production-level stage needs to heavily rely on automated end-to-end operations, use distributed Artificial Intelligence (AI) for cognitive orchestration management minimal manual interventions...
The increased carrier bandwidth and the number of antenna elements expected in 5G networks require a redesign traditional IP-based backhaul CPRI-based fronthaul interfaces used 4G networks. We envision future mobile to encompass these legacy together with novel RAN functional splits. In this scenario, consistent transport network architecture able jointly support 4G/5G is paramount importance. article we present 5G-XHaul, featuring wireless optical technologies multi-technology software...
The development of IPv6 stacks for wireless constrained devices that have limited hardware resources has paved the way many new areas applications and protocols. Constrained Application Protocol (CoAP) been designed by IETF to enable manipulation are capable connecting Internet. Due radio channel capacities resources, congestion is a common phenomenon in networks devices. CoAP implements basic control mechanism transmission reliable messages. Alternative approaches recent topic interest CoRE...
The Constrained Application Protocol (CoAP) is a new Web protocol for the Internet of Things that allows to connect IoT devices directly services hosted in cloud. CoAP based on UDP better fit requirements constrained environments with resource-constrained nodes and low-power communication links. Being an protocol, must still adhere congestion control, primarily keep backbone network stable. Thus, base specification uses conservative parameter values number open requests, retransmission...
As the complexity of electric systems increases, so does required effort for monitoring and management grid operations. To solve performance issues, smart grids require exchange higher volumes data, high availability telecommunication infrastructure, very low latency. The fifth generation (5G) mobile network seems to be most promising technology support such requirements, allowing utilities have dedicated virtual slices resources maximize service in case congestions. Regarding this evolving...
Dense deployments of small cells (SCs) are key to fulfill the capacity requirements future 5G networks. However, two roadblocks adoption SCs are: 1) limited availability and cost sites with wired backhaul resources 2) complexity manage a dense deployment wireless nodes. Towards these challenges we propose SODALITE, novel system that applies software-defined networking (SDN) network. We present, how SODALITE can be integrated 3GPP's 4G architectures, show feasibility through LTE network...
Along with the adoption of 5G, development neutral host solutions provides a unique opportunity for mobile networks operators to accommodate needs emerging use-cases and in consolidation new business models. By exploiting concept network slicing, as one key enabler transition infrastructure service providers can logically split shared physical into multiple isolated customized flexibly address specific demands those tenant slices. Motivated by this reality, H2020 5GCity project proposed...
In this manuscript, we present the main concepts of 5G-PPP SESAME project dedicated to implementation Cloud-Enabled Small Cells (CESCs), able support edge cloud computing in a multi-tenant, multi-service ecosystem. More particularly, give preview concept at component/sub-system, system and operation level. At component/sub-system level, detail our plan deploy multi-operator enabled small cells, enhanced with virtualised execution platform for 5G. envisaged architecture manage control...
Wireless home automation networks are gaining importance for smart homes. In this ambit, ZigBee play an important role. The specification defines a default set of protocol stack parameters and mechanisms that is further refined by the Home Automation application profile. holistic approach, we analyze how network performance affected with tuning across multiple layers investigate possible gains implementing testing alternative settings. evaluations carried out in testbed 57 TelosB motes....
To deliver on the vision of network slicing, future 5G networks will have to provide virtualization and isolation for a variety Radio Access Network (RAN) technologies. In this paper we study how implement RAN slicing in Wi-Fi networks. particular, present scheduling algorithm that allocates airtime through set virtual interfaces executing same or different physical radios, order fulfill each tenant's Service Level Agreement. We demonstrate practical implementation our scheduler Linux...
Smart cities are one of the most important 5G verticals due to their impact on people's life. The neutral host model is key for this vertical, specially promote infrastructure sharing between operators a pervasive deployment. However, it demands enhancements in today's virtualization technologies support geographically scattered and resource constrained computing networking elements (i.e., core data centers, edge point presences, far-edge servers at lampposts, etc.). This paper presents...
Networks of constrained devices play an important role in the Internet Things (IoT). In such networks congestion may lead to significant performance decrease and is a recurring phenomenon given restricted hardware capacities limitations low-power radios. The Constrained Application Protocol (CoAP) designed for IoT communications defines basic control mechanism exchange messages with end-to-end reliability between two endpoints. Yet, transmissions without CoAP base specification does not...
In this paper we study the benefits of applying Software Defined Networking (SDN) to control forwarding in a network constrained wireless edge devices. The proposed architecture is applicable dense Small Cell deployments featuring backhauling and computing capabilities, or wirelessly connected sensor nodes following fog paradigm. introduces novel path policy based on SDN, presents an experimental evaluation demonstrating mitigate external interference, achieve flow balancing, cope with CPU
The Internet of Things (IoT) intends to interconnect massive amount heterogeneous, smart devices, with the goal interweaving virtual world physical world. Smart Cities are typical IoT application domains, comprising networks large number sensors that survey environmental data in order provide different services, such as City Mobility solutions facilitate on-street parking and traffic flow monitoring. Standards specifications defined by Engineering Task Force (IETF), like IPv6, IPv6 over Low...
In this paper we present SWAM, a system that builds on commodity Wi-Fi routers with multiple wireless interfaces to provide access infrastructure supporting multi-tenancy, mobility, and integrated backhaul. An provider can deploy inexpensive SWAM nodes cover given geographical area providing on-demand connectivity for Mobile Network Operators. Our main contribution is the design of datapath control plane, which are inspired by overlay techniques used enable multi-tenancy in data-center...
To meet the communication expectations of future, mobile networks need to evolve quicker than ever toward systems with ultra-low latency, huge traffic volume and higher data rates. Cloud-enabled radio have been introduced as a promising solution these demands help network functions virtualization techniques edge processing capabilities, which allow for increased resource pooling, scalability, layer interworking spectral efficiency. Despite their potential benefits, joint radio-cloud pose...
Dense Small Cell networks are considered the most effective way to cope with exponential increase in mobile traffic demand expected for upcoming years and one of foundations future 5G. However, novel architectures required enable cost-efficient deployments very dense outdoor networks, complementing coverage layer provided by macro-cells. In this regard, two important challenges need be solved make vision a reality: i) increased dynamics, which translated into more frequent handovers, ii)...