Long Term Evolution (LTE) and Cognitive Radio Network (CRN) are built to achieve high data rates with low latency and packet optimized system. Orthogonal Frequency Division Multiple Access (OFDM) is adopted as the access technology for LTE in modern technology. OFDM provides several techniques and advantages for spectrum allocations to network segments, intra-cell Radio Resource Management (RRM...

This paper discusses the motivation for developing a new QoS signaling protocol for IP-based Radio Access Networks. It describes the main characteristics of these networks and the special requirements imposed by these characteristics on QoS signaling solutions. 1 Introducing IP Transport in Radio Access Networks: Motivation Due to its flexibility and cost efficiency, IP transport is gradually i...

In a composite radio environment, different wireless access technologies can be co-operating components of a combined heterogeneous infrastructure. The exploitation of a wireless system, operating in a composite radio context, requires upgraded service and network management capabilities. This paper presents an integrated management system and gives evidence of its capability of optimising serv...

Cloud radio access network is one of the most promising cellular networks for the next generation of mobile networks. The basic idea of cloud RAN (radio access network) is virtualizing and centralizing the intelligent part of the base station, the base band unit, and keeping remote radio heads on cell site enabling a centralized processing and management. Offloading data computation to edge clo...

Abstract: This paper investigates the MAC-protocol performance of an IEEE 802.11 Network that deploys Radio over Fibre technology to distribute radio frequency signals from a central location to remote antenna sites for nomadic users. Our study is based on the current DCF access scheme specifications using both the Basic access method and the RTS/CTS access mechanism. The theoretical results sh...

background and objectives: there are different types of vascular access. we compared the patency rate for six months in ulnar-basilic fistula and radio-cephalic fistula for vascular access in hemodialysis patients.   methods: the study was performed on 60 patients of 50.6±13.5 years of age with end-stage renal failure undergoing hemodialysis from 2012-2014 in imam ali hospital in zahedan. patie...

The European Union funded DRiVE project (Dynamic Radio for IP Services in Vehicular Environments) aims at enabling spectrum-efficient high-quality wireless IP communication in a heterogeneous multi-radio environment to deliver in-vehicle multimedia services. Key issues are spectrum efficiency and dynamic spectrum allocation within different radio networks, the IPv6 based network infrastructure ...

Designing and developing a millimetre-wave (mmWave) based mobile Radio Access Technology (RAT) in the 6-100 GHz frequency range is a fundamental component in the standardization of the new 5G radio interface, recently kicked off by 3GPP. Such component, herein called the new mmWave RAT, will not only enable extreme mobile broadband (eMBB) services, but also support UHD/3D streaming, offer immer...

The virtualization of Radio Access Networks (RANs) has been proposed as one of the important use cases of Network Function Virtualization (NFV). In Virtualized Radio Access Networks (VRANs), some functions from a Base Station (BS), such as those which make up the Base Band Unit (BBU), may be implemented in a shared infrastructure located at either a data center or distributed in network nodes. ...

We address the latency challenges in a high-density and high-load scenario for an ultra-reliable low-latency communication (URLLC) network which may coexist with enhanced mobile broadband (eMBB) services evolving wireless networks. propose new radio resource management (RRM) scheme consisting of combination time domain (TD) frequency (FD) schedulers specific URLLC eMBB users. also develop user ...