Challenges of 5G Networking in Access and Core Networks

2015 ◽  
pp. 161-188 ◽  
Author(s):  
Vasilis Friderikos ◽  
Giorgos Chochlidakis ◽  
Hamid Aghvami ◽  
Mischa Dohler
Keyword(s):  
Mobile Communication ◽  
Management Strategies ◽  
Minimum Cost ◽  
Wireless Access ◽  
Core Network ◽  
Core Networks ◽  
The Core ◽  
Data Rates ◽  
Network Orchestration

The 5th Generation wireless and mobile communication is expected to provide ultrahigh data rates over wireless in the range of Gbps. But 5G will also be about providing consistency and supporting Quality of Experience in a personalized manner. We foresee an evolution in terms of physical layer enhancements to provide increased data rates, whereas a revolutionary step is required in terms of network orchestration and management to provide consistency and efficient utilization of the available resources at a minimum cost. In this chapter, key trends in wireless access technologies and thus-required network management strategies with respect to the core network are discussed. In the roadmap towards 5G networks, we envision an evolution of technologies for supporting Gbps wireless transmission, whereas a revolution would be required from the current modus operandi in the ways network orchestration and resource management is performed in these complex, hierarchical, heterogeneous and highly autonomous wireless networks.

Hybrid Simulated-Emulated Platform – HySEP

2016 ◽  
pp. 380-409
Author(s):  
Igor Bisio ◽  
Stefano Delucchi ◽  
Fabio Lavagetto ◽  
Mario Marchese ◽  
Giancarlo Portomauro ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Traffic Control ◽  
Low Cost ◽  
Access Network ◽  
Wireless Access ◽  
Core Network ◽  
The Core ◽  
Wireless Access Network ◽  
Real Traffic

The main contribution of this chapter is the description of HySEP, Hybrid Simulated-Emulated Platform, developed by the authors and aimed at simulating/emulating heterogeneous networks to validate and test algorithms for traffic control and Quality of Service (QoS) assurance. Main features of HySEP are the appropriate level of accuracy and detail reached by using equipments available in most communication research laboratories, at low cost, and the easy configurability. HySEP is divided into three parts connected each others: the emulated core network; the simulated wireless access network communicating with the core network; and the real remote host. The overall platform is able to handle real traffic flows and overcomes the limitations introduced by other network simulators. HySEP is characterized by remarkable versatility and wide applicability to support the validation of different algorithms.

A controlled deflection routing and wavelength assignment based scheme in Optical Burst Switched (OBS) networks

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Bakhe Nleya ◽  
Philani Khumalo ◽  
Andrew Mutsvangwa
Keyword(s):  
Wavelength Conversion ◽  
Wavelength Assignment ◽  
Wavelength Converters ◽  
Core Network ◽  
Least Cost Path ◽  
Deflection Routing ◽  
Backbone Networks ◽  
The Core ◽  
Optical Burst

AbstractHeterogeneous IoT-enabled networks generally accommodate both jitter tolerant and intolerant traffic. Optical Burst Switched (OBS) backbone networks handle the resultant volumes of such traffic by transmitting it in huge size chunks called bursts. Because of the lack of or limited buffering capabilities within the core network, burst contentions may frequently occur and thus affect overall supportable quality of service (QoS). Burst contention(s) in the core network is generally characterized by frequent burst losses as well as differential delays especially when traffic levels surge. Burst contention can be resolved in the core network by way of partial buffering using fiber delay lines (FDLs), wavelength conversion using wavelength converters (WCs) or deflection routing. In this paper, we assume that burst contention is resolved by way of deflecting contending bursts to other less congested paths even though this may lead to differential delays incurred by bursts as they traverse the network. This will contribute to undesirable jitter that may ultimately compromise overall QoS. Noting that jitter is mostly caused by deflection routing which itself is a result of poor wavelength and routing assigning, the paper proposes a controlled deflection routing (CDR) and wavelength assignment based scheme that allows the deflection of bursts to alternate paths only after controller buffer preset thresholds are surpassed. In this way, bursts (or burst fragments) intended for a common destination are always most likely to be routed on the same or least cost path end-to-end. We describe the scheme as well as compare its performance to other existing approaches. Overall, both analytical and simulation results show that the proposed scheme does lower both congestion (on deflection routes) as well as jitter, thus also improving throughput as well as avoiding congestion on deflection paths.

Multicommodity-Based Delay Analysis for Heterogeneous Wireless Services in Core Network

2012 ◽  
Vol 198-199 ◽  
pp. 1733-1738
Author(s):  
Xiao Wei Qin ◽  
Feng Chen
Keyword(s):  
Access Network ◽  
Core Network ◽  
Wireless Applications ◽  
Core Networks ◽  
Service Delay ◽  
Wireless Access Network ◽  
The Cost ◽  
Mathematics Problem ◽  
Minimal Cost Flow

With the explosive growth of wireless applications, the subscribers’ requirements of QoS (Quality of Service) are increasing as well. In this paper, the upper bound of the tolerant delay of services in wireless access network is investigated, by mapping core network onto a cost-variable directed graph, where the cost is construed as the average service delay of the flows traveling in core network that depends on the current load. A multicommodity minimal cost flow mathematics problem is then derived and solved by Price-directive Decomposition and Lagrangian Relaxation. Simulations are carried out in two typical core networks and some valuable conclusions are gained.

Web Caching

2011 ◽  
pp. 4058-4063
Author(s):  
Antonios Danalis
Keyword(s):  
World Wide Web ◽  
World Wide ◽  
Web Caching ◽  
Core Network ◽  
Implementation Challenges ◽  
Design And Implementation ◽  
The Core ◽  
The World ◽  
Overall Performance

The popularity of the World Wide Web has led to an exponential increase of the traffic generated by its users for over a decade. Such a growth, over such a long period of time, would have saturated both the content providers and the network links had Web caching not been efficiently deployed. Web caching can improve the overall performance of the World Wide Web in several ways, depending on the decisions made regarding the deployment of the corresponding caches. By placing caches in strategic positions, the core network traffic can be reduced, the load of a content provider can be scaled down, and the quality of service, as the users perceive it, can be improved. In this article we present an overview of the major design and implementation challenges in Web caching, as well as their solutions.

Planning and Dimensioning of the 3G UMTS Core Networks

2012 ◽  
pp. 1-29
Author(s):  
Ye Ouyang ◽  
M. Hosein Fallah
Keyword(s):  
Mobile Communications ◽  
The United States ◽  
Network Size ◽  
Core Network ◽  
Core Networks ◽  
Mobile Operator ◽  
Universal Mobile Telecommunications System ◽  
Design Plan

The current literature provides many practical tools or theoretical methods to design, plan, and dimension Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) radio networks, but overlooks the algorithms of the network planning and dimensioning for core networks of GSM, UMTS, and IP Multimedia Subsystem (IMS). This chapter introduces an algorithm for traffic, bandwidth, and throughput dimensioning of the network entities in the UMTS core network. The analysis is based on the traffic and throughput generated or absorbed in the interfaces of the network entities in the UMTS core network. Finally a case study is provided to verify the algorithms created for UMTS core network. This chapter is aimed at helping UMTS network operators dimension an optimum network size and build an optimum network structure to deliver an optimum quality of service for users. The algorithms developed in the chapter have been successfully applied in dimensioning a nationwide UMTS network in North Africa and adopted in an optimization tool by a mobile operator in the United States in 2008-09.

Integration Development of Network Communication and Computer Technology

2014 ◽  
Vol 539 ◽  
pp. 234-238
Author(s):  
Yang Yong Guo
Keyword(s):  
Communication Technology ◽  
Computer Technology ◽  
Mobile Communication ◽  
Computer Network ◽  
Telecommunication Network ◽  
Network Communication ◽  
Core Network ◽  
The Core ◽  
Exchange Management ◽  
Mobile Communication Technology

Through the computer network we can communicate with each other, and the development of the mobile communication technology cannot do without the computer technology. The program-controlled exchange, management, billing and so on in the telecommunication network are completed using the computers. The core network of the mobile communication system depends on the support of computer technology, and many of its elements are the computers of specific functions. The mobile communication and the computer network communication are the science processing the information, with the same signal styles, and they have many of the same subject theories, and a lot of the same technologies are also used in practice.

A Dimensioning Study for UMTS Core Networks

2010 ◽  
Vol 6 (2) ◽  
pp. 19-45
Author(s):  
Ye Ouyang ◽  
M. Hosein Fallah
Keyword(s):  
Mobile Communications ◽  
The United States ◽  
Radio Networks ◽  
Core Network ◽  
Core Networks ◽  
Mobile Operator ◽  
Universal Mobile Telecommunications System ◽  
Design Plan

Current literature provides many practical tools and theoretical methods to design, plan, and dimension Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) radio networks but overlooks the algorithms of network planning and dimensioning for core networks of GSM, UMTS and IP Multimedia Subsystem (IMS). This paper introduces an algorithm for traffic, bandwidth and throughput dimensioning of the network entities in the UMTS core network, based on the traffic and throughput generated or absorbed in the interfaces of the network entities. A case study is provided to verify the algorithms created for UMTS core network. This paper helps UMTS network operators dimension and build an optimum network to deliver the best quality of service for users. The algorithms developed in the paper have been successfully applied in dimensioning a nationwide UMTS network in North Africa and adopted in an optimization tool by a mobile operator in the United States in 2008-2009.

Web Caching

2005 ◽  
pp. 3048-3053
Author(s):  
Antonios Danalis
Keyword(s):  
World Wide Web ◽  
World Wide ◽  
Web Caching ◽  
Core Network ◽  
Implementation Challenges ◽  
Design And Implementation ◽  
The Core ◽  
The World ◽  
Overall Performance

The popularity of the World Wide Web has led to an exponential increase of the traffic generated by its users for over a decade. Such a growth, over such a long period of time, would have saturated both the content providers and the network links had Web caching not been efficiently deployed. Web caching can improve the overall performance of the World Wide Web in several ways, depending on the decisions made regarding the deployment of the corresponding caches. By placing caches in strategic positions, the core network traffic can be reduced, the load of a content provider can be scaled down, and the quality of service, as the users perceive it, can be improved. In this article we present an overview of the major design and implementation challenges in Web caching, as well as their solutions.

A Model for Providing Mobile Multimedia Services Over 4G Networks

2010 ◽  
pp. 523-533
Author(s):  
Kashinath Basu
Keyword(s):  
Mobile Networks ◽  
Significant Proportion ◽  
Access Network ◽  
Core Network ◽  
Research Activity ◽  
Multimedia Services ◽  
The Core ◽  
Traffic Characteristics ◽  
4G Networks

A significant proportion of the traffic on the 4th generation of mobile networks (4G) will be interactive multimedia traffic. This chapter presents the development and evaluation of an edge device model for the lu interface of a 4G network for mapping the Quality of Service (QoS) requirements and traffic characteristics of aggregated IP traffic flows belonging to multiple classes of continuous media (Audio and Video) sources and data classes from the core network onto a single ATM Virtual Channel (VC) at the access network. This model was developed as part of a wider range of research activity focused on supporting QoS in future mobile networks.

scholarly journals Triadic Closure in Core Networks: Disentangling the Effects of Social Distance, National Origin Similarity and Shared Contexts

2016 ◽  
Vol 6 (4) ◽  
pp. 146-162 ◽  
Author(s):  
Gerald Mollenhorst ◽  
Marijtje van Duijn ◽  
Jens Rydgren ◽  
Christofer Edling
Keyword(s):  
Social Distance ◽  
Social Contexts ◽  
Personal Networks ◽  
National Origin ◽  
Core Network ◽  
Core Networks ◽  
The Core ◽  
Composition And Structure ◽  
Triadic Closure ◽  
First And Second Generation

AbstractAcknowledging that the composition and structure of personal networks is affected by meeting opportunities, social distance, and national origin similarity, we aim to disentangle their association with triadic closure in the core of personal networks. We use data (collected 2009) on the core networks of three groups of Swedes (all born in 1990): native Swedes, and first- and second-generation immigrants from Iran and former Yugoslavia, where the respondent (ego) mentions up to five core network members (alters) and whether each pair of alters (dyad) know each other (triadic closure). A three-level multiple membership logistic regression model is performed, which allows the testing of dyadic alter-alter effects, ego effects, and their interaction (i.e., ‘triadic’ effects) on triadic closure. We show that social distance, national origin similarity, and the sharing of social contexts are all associated with triadic closure in the expected direction, and that the effects of social distance and national origin similarity become smaller if shared social contexts are taken into account. The effects of the sharing of social contexts are the largest and are robust, indicating that shared social contexts are a dominant and more important condition for triadic closure than are similarity on relevant socio-demographic characteristics.

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