scholarly journals A study of DiffServ based QoS issues in next generation mobile networks

2021 ◽  
Author(s):  
Thimma V. J. Ganesh Babu ◽  
Alagan Anpalagan ◽  
Jeremiah F. Hayes
Keyword(s):  
Mobile Networks ◽  
Orthogonal Frequency Division Multiplexing ◽  
Radio Resource Management ◽  
Functional Integration ◽  
Management Technique ◽  
Multicarrier Cdma ◽  
Next Generation ◽  
Network Resources ◽  
Multimedia Services ◽  
Radio Access

To provide data rates of the order of hundreds of Mbps and multimedia services, standardization efforts for next generation (4G) systems are focusing on target technologies and seamless connectivity through various types of networks, including wireline networks and WLANs. Different types of multiple access techniques, such as the ones based on multicarrier CDMA and OFDM (orthogonal frequency division multiplexing) have been proposed. There is a need for functional integration of the multiple networks, and, with the evolution of IPv6 and QoS support for IP networks, an IP based interconnectivity is best suited. A QoS aware adaptive radio resource management technique based on multi-code multicarrier CDMA is discussed. We develop a novel radio access method and develop algorithms for allocating and controlling radio network resources so that system performance can be maximized and guaranteed QoS for multimedia services can be provided within the DiffServ environment.

A study of DiffServ based QoS issues in next generation mobile networks

2021 ◽  
Author(s):  
Thimma V. J. Ganesh Babu ◽  
Alagan Anpalagan ◽  
Jeremiah F. Hayes
Keyword(s):  
Mobile Networks ◽  
Orthogonal Frequency Division Multiplexing ◽  
Radio Resource Management ◽  
Functional Integration ◽  
Management Technique ◽  
Multicarrier Cdma ◽  
Next Generation ◽  
Network Resources ◽  
Multimedia Services ◽  
Radio Access

To provide data rates of the order of hundreds of Mbps and multimedia services, standardization efforts for next generation (4G) systems are focusing on target technologies and seamless connectivity through various types of networks, including wireline networks and WLANs. Different types of multiple access techniques, such as the ones based on multicarrier CDMA and OFDM (orthogonal frequency division multiplexing) have been proposed. There is a need for functional integration of the multiple networks, and, with the evolution of IPv6 and QoS support for IP networks, an IP based interconnectivity is best suited. A QoS aware adaptive radio resource management technique based on multi-code multicarrier CDMA is discussed. We develop a novel radio access method and develop algorithms for allocating and controlling radio network resources so that system performance can be maximized and guaranteed QoS for multimedia services can be provided within the DiffServ environment.

scholarly journals Transition technologies towards 6G networks

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Thiago R. Raddo ◽  
Simon Rommel ◽  
Bruno Cimoli ◽  
Chris Vagionas ◽  
Diego Perez-Galacho ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Mobile Networks ◽  
Multiple Input Multiple Output ◽  
Mobile Systems ◽  
60 Ghz ◽  
Next Generation ◽  
Space Optics ◽  
V Band ◽  
Radio Access ◽  
Next Generation Mobile Networks

AbstractThe sixth generation (6G) mobile systems will create new markets, services, and industries making possible a plethora of new opportunities and solutions. Commercially successful rollouts will involve scaling enabling technologies, such as cloud radio access networks, virtualization, and artificial intelligence. This paper addresses the principal technologies in the transition towards next generation mobile networks. The convergence of 6G key-performance indicators along with evaluation methodologies and use cases are also addressed. Free-space optics, Terahertz systems, photonic integrated circuits, softwarization, massive multiple-input multiple-output signaling, and multi-core fibers, are among the technologies identified and discussed. Finally, some of these technologies are showcased in an experimental demonstration of a mobile fronthaul system based on millimeter 5G NR OFDM signaling compliant with 3GPP Rel. 15. The signals are generated by a bespoke 5G baseband unit and transmitted through both a 10 km prototype multi-core fiber and 4 m wireless V-band link using a pair of directional 60 GHz antennas with 10° beamwidth. Results shown that the 5G and beyond fronthaul system can successfully transmit signals with both wide bandwidth (up to 800 MHz) and fully centralized signal processing. As a result, this system can support large capacity and accommodate several simultaneous users as a key candidate for next generation mobile networks. Thus, these technologies will be needed for fully integrated, heterogeneous solutions to benefit from hardware commoditization and softwarization. They will ensure the ultimate user experience, while also anticipating the quality-of-service demands that future applications and services will put on 6G networks.

scholarly journals Performance Prediction of OFDM-Based Cognitive Radio for Next-Generation Networking Capabilities

2020 ◽  
Vol 9 (1) ◽  
pp. 1911-1919
Keyword(s):  
Cognitive Radio ◽  
Mobile Networks ◽  
Orthogonal Frequency Division Multiplexing ◽  
New Technology ◽  
False Alarm Probability ◽  
Probability Of Detection ◽  
Next Generation ◽  
Spectral Correlation ◽  
Multicarrier Transmission ◽  
Daily Life Activities

As a pioneering technology, next generation of mobile networks would overcome many problems of daily life activities. This new technology has many challenges that are tried to be destroyed. In this regard, to optimize the utilization of the allowed spectrum, an essential tool such as cognitive radio (CR) must be employed. It provides opportunity to use spectrum in strategic manner to both licensed and unlicensed users in such a way that the available spectrum is exploited in an efficient strategy. Meanwhile, the orthogonal frequency division multiplexing (OFDM) multicarrier transmission mechanism represents one of the more familiar techniques that are widely applied in free space systems of communication. Since this algorithm has the capability of satisfying the prime aspect of CR, which is associated with locally exploiting the unused spectrum autonomously, OFDM procedure is investigated as a CR system’s candidate. In other words, it is of interest to study its behavior when it is combined with CR technology. Here, our goal is to treat the problem of spectrum sensing techniques in conjunction with OFDM signal. Simulation results show that OFDM spectral correlation can be enhanced via varying the number of samples. Also, OFDM pilot is mandatory and acts as a flag for OFDM frames. So, it is of importance to boost it for better detection. Additionally, the probability of detection (Pd ) is estimated for different values of signal strength when the false alarm probability (Pf ) is fixed. Moreover, receiver operating characteristic, which is the variation of Pd as a function of Pf for a fixed SNR, is drawn for two cases; theoretical and simulated. It is found that the two cases are of high degree of coincidence.

STRATEGIES FOR REDUCING INTER-DOMAIN PRESENCE TRAFFIC: AN ANALYTICAL STUDY

2010 ◽  
Vol 19 (03n04) ◽  
pp. 205-238 ◽  
Author(s):  
VICTORIA BELTRAN ◽  
JOSEP PARADELLS
Keyword(s):  
Mobile Networks ◽  
Instant Messaging ◽  
Great Success ◽  
Next Generation ◽  
Multimedia Services ◽  
Communication Services ◽  
Analytical Formulas ◽  
Main Barrier ◽  
And Control ◽  
Or Applications

Presence information was the key enabler to the great success of instant messaging applications. First, this information was limited to simple binary states such as online, offline or busy. However, this is, currently, evolving towards a much more generic, flexible concept to include all context that allows users or applications to adapt and control communications in a more efficient and personalized manner. Presence paves the way for the deployment of advanced communication services and is therefore a key component in the Next-Generation Networks (NGNs). These networks aim to unify fixed and mobile networks in order to provide users with global connectivity to always-on multimedia services. The main barrier to the implantation of next-generation presence-based services is the great amount of traffic involved in the distribution of presence information across domains. We study two strategies described in IETF drafts and one novel solution for reducing inter-domain presence traffic. We present the analytical formulas that calculate the traffic for the three strategies. Building on the analytical results, we analyze the factors that have impact on these strategies and study the suitability of each one under different conditions.

Transparent IP radio access for next-generation mobile networks

2003 ◽  
Vol 10 (4) ◽  
pp. 26-35 ◽  
Author(s):  
D. Wisely ◽  
H. Aghvami ◽  
S.L. Gwyn ◽  
T. Zahariadis ◽  
J. Manner ◽  
...  
Keyword(s):  
Mobile Networks ◽  
Next Generation ◽  
Radio Access ◽  
Next Generation Mobile Networks

scholarly journals Next Generation of SDN in Cloud-Fog for 5G and Beyond-Enabled Applications: Opportunities and Challenges

Network ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 28-49
Author(s):  
Ehsan Ahvar ◽  
Shohreh Ahvar ◽  
Syed Mohsan Raza ◽  
Jose Manuel Sanchez Vilchez ◽  
Gyu Myoung Lee
Keyword(s):  
Internet Of Things ◽  
Data Sharing ◽  
Mobile Networks ◽  
The Other ◽  
The Internet ◽  
Hybrid Cloud ◽  
Next Generation ◽  
Delay Constraints ◽  
Mission Critical ◽  
Iot Devices

In recent years, the number of objects connected to the internet have significantly increased. Increasing the number of connected devices to the internet is transforming today’s Internet of Things (IoT) into massive IoT of the future. It is predicted that, in a few years, a high communication and computation capacity will be required to meet the demands of massive IoT devices and applications requiring data sharing and processing. 5G and beyond mobile networks are expected to fulfill a part of these requirements by providing a data rate of up to terabits per second. It will be a key enabler to support massive IoT and emerging mission critical applications with strict delay constraints. On the other hand, the next generation of software-defined networking (SDN) with emerging cloudrelated technologies (e.g., fog and edge computing) can play an important role in supporting and implementing the above-mentioned applications. This paper sets out the potential opportunities and important challenges that must be addressed in considering options for using SDN in hybrid cloud-fog systems to support 5G and beyond-enabled applications.

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