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.

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.

An Analysis of Traffic and Throughput for UMTS Packet Core Networks

2012 ◽  
pp. 82-107
Author(s):  
Ye Ouyang ◽  
M. Hosein Fallah
Keyword(s):  
Mobile Communications ◽  
Network Size ◽  
Service Market ◽  
Data Services ◽  
Core Networks ◽  
Mobile Industry ◽  
Universal Mobile Telecommunications System ◽  
Design Plan

Mobile packet services are penetrating mobile markets rapidly. The mobile industry relies heavily on data services to replace traditional voice services. Designing a reliable packet service network is critical to the mobile operators’ ability to maintain their core competence in a data service market. The 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 plan and dimensioning for the core networks. This paper introduces the algorithms to dimension the throughput for packet switched domain of a UMTS network. The analysis is based on the traffic and data throughput generated and absorbed in the interfaces of network entities in UMTS PS network. A case study is provided to verify the algorithms created for UMTS PS network. This paper provides UMTS PS network operators an optimum network size and network structure to deliver an optimum quality of service for users.

An Analysis of Traffic and Throughput for UMTS Packet Core Networks

2010 ◽  
Vol 2 (2) ◽  
pp. 1-26 ◽  
Author(s):  
Ye Ouyang ◽  
M. Hosein Fallah
Keyword(s):  
Mobile Communications ◽  
Network Size ◽  
Service Network ◽  
Service Market ◽  
Data Services ◽  
Core Networks ◽  
Mobile Industry ◽  
Universal Mobile Telecommunications System

Mobile packet services are penetrating mobile markets rapidly. The mobile industry relies heavily on data services to replace traditional voice services. Designing a reliable packet service network is critical to the mobile operators’ ability to maintain their core competence in a data service market. The 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 plan and dimensioning for the core networks. This paper introduces the algorithms to dimension the throughput for packet switched domain of a UMTS network. The analysis is based on the traffic and data throughput generated and absorbed in the interfaces of network entities in UMTS PS network. A case study is provided to verify the algorithms created for UMTS PS network. This paper provides UMTS PS network operators an optimum network size and network structure to deliver an optimum quality of service for users.

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.

When Law and Order Works: Boston's Innovative Approach to the Problem of Racial Violence

1986 ◽  
Vol 32 (2) ◽  
pp. 205-223 ◽  
Keyword(s):  
Police Department ◽  
The United States ◽  
Racial Violence ◽  
Policy Implications ◽  
Innovative Approach ◽  
Law And Order ◽  
Innovative Strategies ◽  
Racial Incidents

Racial and ethnic violence continues to be a major problem in the United States. Boston, which experienced hightened racial turmoil since its desegregation process, presents an excellent case study of a police department that faced the problem in a straightforward manner. Traditional methods of classifying and investigating racial incidents were viewed as ineffective. The Boston Police Department developed an innovative approach to the handling of racially motivated crime, which involved implementing a departmentwide policy and creating a specialized police unit. This unit was highly successful in uncovering incidents that under traditional reporting methods appeared commonplace. Upon further examination, these incidents, taken together, indicated persistent and compelling patterns of racial animus. The uncovering of these incidents, the subsequent relabeling of them into “community disorders,” and the development of innovative strategies are described. Policy implications and recommendations are presented. Critics may question the allocation of police resources to a problem that on the surface may appear minor. However, racial violence viewed in the aggregate form has dramatic impact on the quality of life for the victim. A police department that recognizes the significance of this problem is making an important statement about the kind of society we are and what we as a nation stand for.

Rethinking the Relationship Between Public Regulation and Private Litigation: Evidence from Securities Class Action in China

2018 ◽  
Vol 19 (1) ◽  
pp. 333-361
Author(s):  
Robin Hui Huang
Keyword(s):  
The United States ◽  
Class Action ◽  
Public And Private ◽  
Securities Law ◽  
Recent Developments ◽  
Public And Private Enforcement ◽  
The Relationship ◽  
The U.S

Abstract China has a civil procedure for collective litigation, which is dubbed Chinese-style class action, as it differs from the U.S.-style class action in some important ways. Using securities class action as a case study, this Article empirically examines both the quantity and quality of reported cases in China. It shows that the number of cases is much lower than expected, but the percentage of recovery is significantly higher than that in the United States. Based on this, the Article casts doubt on the popular belief that China should adopt the U.S.-style class action, and sheds light on the much-debated issue concerning the relationship between public and private enforcement of securities law. The Article also discusses the future prospects of securities class action in China in light of some recent developments which may provide its functional equivalents, including the regulator-brokered compensation fund and public interest group litigation.

scholarly journals Optimising Differentiated Services Strategies under IMS

2018 ◽  
Vol 2 (3) ◽  
pp. 1-10
Author(s):  
David K. Osei-Aboagye ◽  
Peter S. Excell
Keyword(s):  
Mobile Communications ◽  
Network Architecture ◽  
Discrete Event ◽  
Differentiated Services ◽  
Main Concern ◽  
Network Architectures ◽  
Network Simulator ◽  
Core Network ◽  
Network Technologies

The evolving standards of mobile communications, the wide variety of services they offer and the rapid growth of the Internet have made a merger of the two network technologies inevitable. One of the most prominent platforms that has been developed to facilitate this is the IP Multimedia Subsystem (IMS) concept. Many mobile communications standards integrate IMS as the main core network architecture and Quality of Service (QoS) is the main concern for customer satisfaction. A major approach to optimisation of QoS is the Differentiated Services scheme, and a simulation study of implementations of this is presented. The study covered an IMS core network architecture modelled with discrete-event network simulator software, with a Differentiated Services QoS scheme run over it with differing bearer traffic scenarios. Implications for core network architectures are discussed.

scholarly journals Contextualisation: A case study of a team within an international missional order

2021 ◽  
Vol 42 (1) ◽  
Author(s):  
Kasebwe T.L. Kabongo
Keyword(s):  
South Africa ◽  
Local Community ◽  
The United States ◽  
Cultural Bias ◽  
Good News ◽  
Community Members ◽  
Incarnational Ministry ◽  
Biblical Values

Contextualisation is a process of seeking meaning and relevancy in a constantly changing world. It is a theological imperative if biblical values were to be relevant to everyone in the world. This research is a case study of InnerCHANGE South Africa (ICSA) efforts to be contextual. InnerCHANGE South Africa is part of an international missional order called InnerCHANGE, which was started in 1984 in the United States of America. International organisations face the danger of coming up with uniform principles and practices. Such uniformity is never innocent of cultural bias. It rendered their principles and practices relevant in some contexts and irrelevant in others. InnerCHANGE is an incarnational ministry that focuses on identification in communities of poverty. It described incarnational ministry as a model of Christ, a method, a message and a spiritual discipline. This study investigated how ICSA has been able to contextualise these four elements of incarnational ministry. It concluded that these contextualisation efforts are still work in progress. It pointed out the encouraging signs of seeing many local community members aligning themselves behind ICSA vision of seeing the gospel as the good news made visible. It finally pointed out the challenges of contextualisation it is still facing.Intradisciplinary and/or interdisciplinary implications: This article is based on the field of missiology. It engaged development studies, specifically grassroots community development, to point out one of the roles of the church in society, which is to participate in improving the quality of life of the vulnerable.

Initial Improvement in Ride Quality of Jointed, Plain Concrete Pavement with Microsurfacing: Case Study

1996 ◽  
Vol 1545 (1) ◽  
pp. 3-10 ◽  
Author(s):  
James S. Moulthrop ◽  
Larry Day ◽  
W. R. Ballou
Keyword(s):  
Plain Concrete ◽  
The United States ◽  
Concrete Pavement ◽  
Ride Quality ◽  
Construction Techniques ◽  
Before And After ◽  
Initial Improvement ◽  
And Performance

Safety, cost, ride quality, and performance are characteristics of pavement systems that are considered high-priority customer demands by transportation agencies throughout the world. Ride quality is the characteristic most notable to the traveling public. Throughout the United States, numerous state and federal agencies have developed specifications that require that road contractors meet a minimum level of ride quality before a pavement is approved for payment. Studies have shown that initial (as constructed) ride quality is an important factor in determining overall serviceability and length of time to rehabilitation or reconstruction. A case study in Cowley County, Kansas, in which the ride quality of an existing jointed, plain concrete pavement was significantly improved by the placement of a thin, polymer-modified, asphaltemulsion microsurfacing system, is described. The existing pavement conditions, the construction techniques used by the contractor, and the smoothness measurements before and after construction are noted and discussed. It was found that a marked reduction in roughness can be accomplished with unique construction techniques and microsurfacing.

Looming Threats to the Intimate Bond in Hospice Care? Economic and Organizational Pressures in the Case Study of a Hospice

2007 ◽  
Vol 54 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Elijah G. Ward ◽  
Audrey K. Gordon
Keyword(s):  
United States ◽  
Hospice Care ◽  
The United States ◽  
Ethnographic Case Study ◽  
Policy Changes ◽  
Client Care ◽  
Client Relationship ◽  
Midwestern City

Hospice organizations are assailed by stiff competition, ever-rising costs, limited funding, and policy changes. Do such pressures stifle the high quality of care these organizations strive to provide? As a case-in-point, we draw from the mid-1990s accounts of caregivers at a nonprofit hospice in a Midwestern city in the United States. We maintain that economic pressures drive organizational restructuring, which then weakens working conditions and, thereby, weakens the staff-client relationship. We discuss effects upon worker behaviors, the worker-client relationship, and client care. This ethnographic case study signals the need to closely examine the threats that current economic and organizational pressures in the United States may pose to the quality of hospice care.

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