Uplink blocking probabilities in priority-based cellular CDMA networks with finite source population

Fast proliferation of mobile Internet and high-demand mobile applications necessitates the introduction of different priority classes in next-generation cellular networks. This is especially crucial for efficient use of radio resources in the heterogeneous and virtualized network environments. Despite the fact that many analytical tools have been proposed for capacity and radio resource modelling in cellular networks, only a few of them explicitly incorporate priorities among services. We propose a novel analytical model to analyse the performance of a priority-based cellular CDMA system with finite source population. When the cell load is above a certain level, low-priority calls may be blocked to preserve the quality of service of high-priority calls. The proposed model leads to an efficient closed-form solution that enables fast and very accurate calculation of resource occupancy of the CDMA system and call blocking probabilities, for different services and many priority classes. To achieve them, the system is modelled as a continuous-time Markov chain. We evaluate the accuracy of the proposed analytical model by means of computer simulations and find that the introduced approximation errors are negligible

Big Data Meets Telcos: A Proactive Caching Perspective

Mobile cellular networks are becoming increasingly complex to manage while classical deployment/optimization techniques and current solutions (i.e., cell densification, acquiring more spectrum, etc.) are cost-ineffective and thus seen as stopgaps. This calls for development of novel approaches that leverage recent advances in storage/memory, context-awareness, edge/cloud computing, and falls into framework of big data. However, the big data by itself is yet another complex phenomena to handle and comes with its notorious 4V: velocity, voracity, volume and variety. In this work, we address these issues in optimization of 5G wireless networks via the notion of proactive caching at the base stations. In particular, we investigate the gains of proactive caching in terms of backhaul offloadings and request satisfactions, while tackling the large-amount of available data for content popularity estimation. In order to estimate the content popularity, we first collect users' mobile traffic data from a Turkish telecom operator from several base stations in hours of time interval. Then, an analysis is carried out locally on a big data platform and the gains of proactive caching at the base stations are investigated via numerical simulations. It turns out that several gains are possible depending on the level of available information and storage size. For instance, with 10% of content ratings and 15.4 Gbyte of storage size (87% of total catalog size), proactive caching achieves 100% of request satisfaction and offloads 98% of the backhaul when considering 16 base stations.Comment: 8 pages, 5 figure

Performance analysis of telecommunications regulations in Nigeria: A quality of service approach

The revolution of wireless communications regulations in Nigeria signifies enhancement in ICT innovation, investment opportunities, fair competition and inclusive growth through, strategic collaboration and partnerships to protect and empower consumers. The demand for data in the 4G (Fourth Generation networks) and 5G (Fifth Generation networks) is becoming excessively high and the solution is being investigated to effectively utilize the available spectrum at the physical layer across different protocols to speed-up bandwidth access from 2.5 to 10 times to support new high-performance applications (e.g. e-health, high definition video streaming, network gaming, e-commerce, e-government etc.) To realize the above targets the operators need to provide some form of Quality of Service (QoS) and Quality of Experience (QoE) assurance. The 8-Point Agenda of the EVC/CEO of Nigerian Communications Commission (NCC) factored upon a tripod of Availability, Accessibility and Affordability of Service, the Nigerian Communications Act 2003, the National Telecommunications Policy, the Strategic Management Plan of the Commission, the National Digital Economy Policy and Strategy and other extant regulatory provisions are utilized to regulate telecommunications services and promote universal access in Nigeria. This paper reviewed the QoS Key Performance Indicators (KPIs) like The CSSR, DCR, SDCONG, and TCHCONG CSSR, MTTR, and Power Availability for 2G, 3G and 4G according to the International Telecommunications Union Standards (ITU-T) and NCC criteria. Literature review on QoS and congestion control analysis were conducted and the research gaps were identified for the development of effective regulations and operational excellence. Recommendations were made on the way forward to explore the optimization of electricity supply to base station using hybrid system, renewable and green energy to reduce operational cost and emissions