State of the art baseband DSP platforms for Software Defined Radio: A survey

Software Defined Radio (SDR) is an innovative approach which is becoming a more and more promising technology for future mobile handsets. Several proposals in the field of embedded systems have been introduced by different universities and industries to support SDR applications. This article presents an overview of current platforms and analyzes the related architectural choices, the current issues in SDR, as well as potential future trends.Peer reviewe

Performance Evaluation of v-eNodeB using Virtualized Radio Resource Management

With the demand upsurge for high bandwidth services, continuous increase in the number of cellular subscriptions, adoption of Internet of Things (IoT), and marked growth in Machine-to-Machine (M2M) traffic, there is great stress exerted on cellular network infrastructure. The present wireline and wireless networking technologies are rigid in nature and heavily hardware-dependent, as a result of which the process of infrastructure upgrade to keep up with future demand is cumbersome and expensive. Software-defined networks (SDN) hold the promise to decrease network rigidity by providing central control and flow abstraction, which in current network setups are hardware-based. The embrace of SDN in traditional cellular networks has led to the implementation of vital network functions in the form of software that are deployed in virtualized environments. This approach to move crucial and hardware intensive network functions to virtual environments is collectively referred to as network function virtualization (NFV). Our work evaluates the cost reduction and energy savings that can be achieved by the application of SDN and NFV technologies in cellular networks. In this thesis, we implement a virtualized eNodeB component (Radio Resource Management) to add agility to the network setup and improve performance, which we compare with a traditional resource manager. When combined with dynamic network resource allocation techniques proposed in Elastic Handoff, our hardware agnostic approach can achieve a greater reduction in capital and operational expenses through optimal use of network resources and efficient energy utilization. Advisor: Jitender S. Deogu

Systems action design research : delineation of an application to develop hybrid local climate services

In this thesis, a Systems Action Design Research (SADR) model was developed, which allows the Action Design Research Paradigm to be extended to process hybrid systems of stationary or changing interacting systems; including both quantitative and qualitative aspects. The crucial challenge is to get the experts and grass-root end-users to work together actively in a participatory and cocreative way instead of the foremost current expert dominated practices. Hence the basic model is engaged with an epistemic Delphi entry process, which considers the particular application. This study delineates a unique application to develop hybrid local climate services, which take into account also humanitarian values and presents three case studies done in Mozambique, Kenya, and Tanzania conducted by design thinking.Tutkimuksessa on kehitetty vuorovaikutteisten järjestelmien toiminnan suunnittelun tutkimusmalli, joka laajentaa aikaisempia toiminnan suunnittelun tutkimusmalleja stationaarisiin tai muuttuviin vuorovaikutteisiin mahdollisimman kokonaisvaltaisiin eli hybrideihin järjestelmiin. Malli ottaa huomioon sekä määrällisiä että laadullisia tekijöitä. Vielä nykyisin vallalla olevien asiantuntijapainotteisten käytäntöjen välttämättömänä haasteena on saattaa asiantuntijat ja ruohonjuuritason loppukäyttäjät työskentelemään yhteisen luovuuden merkeissä osallistavalla tavalla. Tästä syystä kehitetyn mallin olennaisena osana on episteeminen, sovelluskohtainen Delphi-prosessi. Sovelluksena toteutettavien hybridien paikallisten loppukäyttäjien tietotarpeita palvelevien mobiili-ilmastomallien osalta viitoitetaan tämän sovelluksen pääpiirteet tutkimuksessa esitetyn mallin näkökulmasta sekä esitetään kolmen Itä-Afrikassa (Mosambik, Kenia ja Tansania) suunnitteluajattelun mukaisesti toteutetun ideointiprojektin ehdotukset. Kehitettävissä mobiiliilmastopalveluissa otetaan soveltuvin osin huomioon myös humanitaariset arvot. Tulokset osoittavat, että kehitetty malli voi avata uusia näköaloja hybridien paikallisten mobiili-ilmastopalvelujen kehittämiseen ruohonjuuritason viljelijöille

Flexible and Distributed Real-Time Control on a 4G Telecom MPSoC

International audienceApplications like 4G baseband modem require single-chip implementation to meet the integration and power consumption requirements. These applications demand a high computing performance with real-time constraints, low-power consumption and low cost. With the rapid evolution of telecom standards and the increasing demand for multi-standard products, the need for exible baseband solutions is growing. The concept of Multi-Processor System-on-Chip (MPSoC) is well adapted to enable hardware reuse between products and between multiple wireless standards in the same device. Based on the experience of two heterogeneous Software Defined Radio (SDR) telecom chipsets, this paper presents a distributed control architecture for the homoGENEous Processor arraY (GENEPY) platform for 4G applications. This MPSoC platform is built with telecom baseband processors interconnected with a Network-on-Chip. The control is performed by a MIPS processor embedded in each baseband processor. This control processor can locally reconfigure and schedule the applications with real-time telecom constraints

Niger's infrastructure : a continental perspective

Between 2000 and 2005 infrastructure made a net contribution of less than a third of a percentage point to the improved per capita growth performance of Niger, one of the lowest contributions in Sub-Saharan Africa. Raising the country's infrastructure endowment to that of the region’s middle-income countries could boost annual growth in Niger by about 4.5 percentage points. Niger has made significant progress in some areas of its infrastructure, including water and telecommunications. But the country still faces a number of important infrastructure challenges, the most pressing of which is probably in the water and sanitation sector, as 82 percent of Nigeriens still practice open defecation, the highest in the continent. Niger also faces significant challenges in the power sector, as only 8 percent of the population is electrified. Niger currently spends about $225 million per year on infrastructure, leaving an annual funding gap of$460 million even after savings from curing inefficiencies are taken into account. Niger can close that gap by tapping alternative sources of financing or by adopting lower-cost technologies. There is plenty of room for private-sector participation in Niger's infrastructure sectors, and the adoption of lower-cost technologies could reduce the funding gap by almost half.Transport Economics Policy&Planning,Infrastructure Economics,Town Water Supply and Sanitation,Water Supply and Systems,Energy Production and Transportation

Energy and throughput efficient strategies for heterogeneous future communication networks

As a result of the proliferation of wireless-enabled user equipment and data-hungry applications, mobile data traffic has exponentially increased in recent years.This in-crease has not only forced mobile networks to compete on the scarce wireless spectrum but also to intensify their power consumption to serve an ever-increasing number of user devices. The Heterogeneous Network (HetNet) concept, where mixed types of low-power base stations coexist with large macro base stations, has emerged as a potential solution to address power consumption and spectrum scarcity challenges. However, as a consequence of their inflexible, constrained, and hardware-based configurations, HetNets have major limitations in adapting to fluctuating traffic patterns. Moreover, for large mobile networks, the number of low-power base stations (BSs) may increase dramatically leading to sever power consumption. This can easily overwhelm the benefits of the HetNet concept. This thesis exploits the adaptive nature of Software-defined Radio (SDR) technology to design novel and optimal communication strategies. These strategies have been designed to leverage the spectrum-based cell zooming technique, the long-term evolution licensed assisted access (LTE-LAA) concept, and green energy, in order to introduce a novel communication framework that endeavors to minimize overall network on-grid power consumption and to maximize aggregated throughput, which brings significant benefits for both network operators and their customers. The proposed strategies take into consideration user data demands, BS loads, BS power consumption, and available spectrum to model the research questions as optimization problems. In addition, this thesis leverages the opportunistic nature of the cognitive radio (CR) technique and the adaptive nature of the SDR to introduce a CR-based communication strategy. This proposed CR-based strategy alleviates the power consumption of the CR technique and enhances its security measures according to the confidentiality level of the data being sent. Furthermore, the introduced strategy takes into account user-related factors, such as user battery levels and user data types, and network-related factors, such as the number of unutilized bands and vulnerability level, and then models the research question as a constrained optimization problem. Considering the time complexity of the optimum solutions for the above-mentioned strategies, heuristic solutions were proposed and examined against existing solutions. The obtained results show that the proposed strategies can save energy consumption up to 18%, increase user throughput up to 23%, and achieve better spectrum utilization. Therefore, the proposed strategies offer substantial benefits for both network operators and users

Heterogeneous vs Homogeneous MPSoC Approaches for a Mobile LTE Modem

International audienceApplications like 4G baseband modem require single-chip implementation to meet the integration and power consumption requirements. These applications demand a high computing performance with real-time constraints, low-power consumption and low cost. With the rapid evolution of tele- com standards and the increasing demand for multi-standard products, the need for flexible baseband solutions is growing. The concept of Multi-Processor System-on-Chip (MPSoC) is well adapted to enable hardware reuse between products and between multiple wireless standards in the same device. Heterogeneous architectures are well known solutions but they have limited flexibility. Based on the experience of two heterogeneous Software De- fined Radio (SDR) telecom chipsets, this paper presents the homoGENEous Processor arraY (GENEPY) platform for 4G ap- plications. This platform is built with SMEP units interconnected with a Network-on-Chip. The SMEP, implemented in 65nm low- power CMOS, can perform 3.2 GMAC/s with 77 GBits/s internal bandwidth at 400MHz. Two implementations of homogeneous GENEPY are compared to the heterogeneous MAGALI platform in terms of silicon area, performance and power consumption. Results show that a homogeneous approach can be more efficient and flexible than a heterogeneous approach in the context of 4G Mobile Terminals