Web Services for Quality of Service Based Charging

2010 ◽  
pp. 219-236
Author(s):  
Evelina Pencheva ◽  
Ivaylo Atanasov
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
Telecommunication Network ◽  
Single Point ◽  
Multimedia Networks ◽  
Qos Management ◽  
Charging Control ◽  
Underlying Network

Parlay X is a set of Web Service interfaces. These interfaces are designed to provide open access to telecommunication network functions in order to hide underlying network technology, and its control protocol complexity, from application developers. The Parlay X “intelligence” is concentrated in a node called Parlay X Gateway which converts interfaces methods in protocol messages and vice versa. An inherent constraint on any implementation requires the Parlay X Gateway to govern the interface to the underlying network i.e., to provide a single point of contact at which vertical signaling is received from the network. This chapter presents a study on alternatives for Parlay X Web Service deployment in Internet Protocol based multimedia networks (IMS). The focus is set on Parlay X Web Services for application-driven quality of service (QoS) management and charging control. It is presented as an analysis of the interfaces. Particularly the discussion is about their applicability to Policy and Charging Control architecture in IMS. Going further, the Web Service interfaces are mapped onto network protocols that they affect, namely Session Initiation Protocol (SIP) and Diameter. On that base an improvement is suggested concerning Parlay X interfaces for QoS management without violating the specified interface functionality. The usage of Web Services is exemplified with an application for charging control based on the provided QoS.

scholarly journals Open Access to Resource Management through Web Services

2012 ◽  
Vol 12 (1) ◽  
pp. 78-96
Author(s):  
Ivaylo Atanasov ◽  
Evelina Pencheva ◽  
Dora Marinska
Keyword(s):  
Quality Of Service ◽  
Resource Management ◽  
Open Access ◽  
Web Services ◽  
Multimedia Networks ◽  
Network Operator ◽  
Qos Management ◽  
Charging Control ◽  
Service Control

Abstract The paper investigates the capabilities for open access to resource management in multimedia networks through Parlay X Web Services. Resource management allows the network operator to provide Quality of Service (QoS) to user sessions and to apply advanced charging. The study is based on the analysis of Policy and Charging Control (PCC) functions defined for evolved packet systems The PCC comprises flow-based charging including charging control and online credit control, gating control, and Quality of Service Control (QoS) control. The required functionality for open access to QoS management and advanced charging is identified. Parlay X Web Services are evaluated for the support of PCC and some enhancements are suggested. Implementation aspects are discussed and Parlay X interfaces are mapped on IMS control protocols. Use Cases of Parlay X Web services for PCC are presented.

scholarly journals Parlay X Web Services for Policy and Charging Control in Multimedia Networks

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Ivaylo Atanasov ◽  
Evelina Pencheva ◽  
Dora Marinska
Keyword(s):  
Open Access ◽  
Web Services ◽  
Multimedia Networks ◽  
Packet Networks ◽  
The Core ◽  
Qos Management ◽  
Charging Control ◽  
Implementation Aspects ◽  
Core Features

The paper investigates the capabilities of Parlay X Web Services for Policy and Charging Control (PCC) in managing all Internet-protocol-based multimedia networks (IMSs). PCC is one of the core features of evolved packet networks. It comprises flow-based charging including charging control and online credit control, gating control, and Quality of Service (QoS) control. Based on the analysis of requirements for PCC, the functionality for open access to QoS management and advanced charging is identified. Parlay X Web Services are evaluated for the support of PCC, and some enhancements are suggested. Implementation aspects are discussed, and Parlay X interfaces are mapped onto IMS control protocols. Use cases of Parlay X Web Services for PCC are presented.

Multi-criteria Web Services Selection: Balancing the Quality of Design and Quality of Service

2022 ◽  
Vol 22 (1) ◽  
pp. 1-31
Author(s):  
Marwa Daaji ◽  
Ali Ouni ◽  
Mohamed Mohsen Gammoudi ◽  
Salah Bouktif ◽  
Mohamed Wiem Mkaouer
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
State Of The Art ◽  
Service Selection ◽  
Service Design ◽  
Design Quality ◽  
Trade Off ◽  
Selection Approach

Web service composition allows developers to create applications via reusing available services that are interoperable to each other. The process of selecting relevant Web services for a composite service satisfying the developer requirements is commonly acknowledged to be hard and challenging, especially with the exponentially increasing number of available Web services on the Internet. The majority of existing approaches on Web Services Selection are merely based on the Quality of Service (QoS) as a basic criterion to guide the selection process. However, existing approaches tend to ignore the service design quality, which plays a crucial role in discovering, understanding, and reusing service functionalities. Indeed, poorly designed Web service interfaces result in service anti-patterns, which are symptoms of bad design and implementation practices. The existence of anti-pattern instances in Web service interfaces typically complicates their reuse in real-world service-based systems and may lead to several maintenance and evolution problems. To address this issue, we introduce a new approach based on the Multi-Objective and Optimization on the basis of Ratio Analysis method (MOORA) as a multi-criteria decision making (MCDM) method to select Web services based on a combination of their (1) QoS attributes and (2) QoS design. The proposed approach aims to help developers to maintain the soundness and quality of their service composite development processes. We conduct a quantitative and qualitative empirical study to evaluate our approach on a Quality of Web Service dataset. We compare our MOORA-based approach against four commonly used MCDM methods as well as a recent state-of-the-art Web service selection approach. The obtained results show that our approach outperforms state-of-the-art approaches by significantly improving the service selection quality of top- k selected services while providing the best trade-off between both service design quality and desired QoS values. Furthermore, we conducted a qualitative evaluation with developers. The obtained results provide evidence that our approach generates a good trade-off for what developers need regarding both QoS and quality of design. Our selection approach was evaluated as “relevant” from developers point of view, in improving the service selection task with an average score of 3.93, compared to an average of 2.62 for the traditional QoS-based approach.

A PLATFORM FOR SERVICE PROVIDER TO ADVERTISE QUALITY OF SERVICE USING WSDL

2011 ◽  
Vol 08 (04) ◽  
pp. 291-302
Author(s):  
RAVI SHANKAR PANDEY
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
Service Provider ◽  
Quality Attributes ◽  
The Internet ◽  
Service Description ◽  
Description Language ◽  
Java Code

Web services are programs which perform some elementary business process of an application and are distributed over the Internet. These services are described, discovered and executed using standard languages WSDL, SOAP and UDDI. Proliferation of web services has resulted in intense competition between providers, which provide the same service. To survive in such a competitive environment, they need to advertise the quality of their service. Web service description language does not provide support to describe quality attributes. Recently, DAmbrogio proposed QOS model of web services based on a meta model of WSDL. In this paper, we present a platform to advertise QOS as declared by the service provider. This tool generates a WSDL file from Java code along with its quality of service attributes. It accepts Java code and a file containing quality attributes. These attributes include reliability, availability, and operation demand and operation latency. These attributes are included in WSDL file as a content of description element.

scholarly journals Open Access to Resource Management in Multimedia Networks

2009 ◽  
Vol 5 (1) ◽  
Author(s):  
Evelina Nikolova Pencheva ◽  
Ivaylo Ivanov Atanasov
Keyword(s):  
Quality Of Service ◽  
Resource Management ◽  
Web Service ◽  
Service Management ◽  
Value Added ◽  
Third Party ◽  
Multimedia Networks ◽  
Service Access ◽  
Management Functions

The paper is dedicated to mechanisms for open access to resource management in the Internet Protocol (IP) multimedia networks. First we present the concept of IP Multimedia Subsystem (IMS) and explain the IMS functional architecture, principles of quality of service management and service control in IMS. Then we describe the idea behind the opening of network interfaces for third parties so that others besides the network operator can create and deploy services. Open Service Access (OSA) and Parlay appear to be the technologies for value-added service delivery in multimedia networks. In the paper we take a closer look to the Parlay/OSA interfaces that allow third party applications to access the resource management functions in IMS. OSA "Connectivity Manager" interfaces and OSA "Policy Management" interfaces are considered. Parlay X Web Services interfaces provide a higher level of abstraction than Parlay/OSA interfaces and gain an amazing amount of support among service developers. We address "Applicationdriven Quality of Service" Parlay X Web Service and "Policy" Parlay X Web Service also.

Third Party Multimedia Streaming Control with Guaranteed Quality of Service in Evolved Packet System

2014 ◽  
pp. 505-526
Author(s):  
Evelina Pencheva
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
Multimedia Streaming ◽  
Third Party ◽  
Application Server ◽  
Guaranteed Quality ◽  
State Models ◽  
And Control

This paper studies implementation issues of Parlay X “Multimedia Streaming Control” and “Application-driven Quality of Service” web services in the Evolved Packet System (EPS). EPS is defined as evolution of mobile communication networks with broadband radio interface and Internet Protocol (IP) based core. The main signalling protocols in EPS used for multimedia session management and quality of service control are respectively Session Initiation Protocol (SIP) and Diameter. The functional architecture for third party multimedia streaming control with guaranteed quality of service considers deployment of an application server which exposes web service interfaces toward applications and control protocols toward the network. In a role of mediation functionality, this application server is responsible for the translation between web services interface operations and control protocol messages. In addition, it needs to maintain synchronized state models that reflect both third party application view and protocol view. An approach to automated functional verification of such type of application server providing “Multimedia Streaming Control” and “Application-driven Quality of Service” web service interfaces is suggested. Use cases that illustrate the approach applicability are described.

Quality-of-Service Based Web Service Composition and Execution Framework

2014 ◽  
pp. 74-93
Author(s):  
Bassam Al Shargabi ◽  
Osama Al-haj Hassan ◽  
Alia Sabri ◽  
Asim El Sheikh
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
Service Composition ◽  
Service Selection ◽  
Web Service Composition ◽  
Web Service Selection ◽  
Selection Decisions ◽  
Uddi Registry

Software is gradually becoming more built by composing web services to support enterprise applications integration; thus, making the process of composing web services a significant topic. The Quality of Service (QoS) in web service composition plays a crucial role. As such, it is important to guarantee, monitor, and enforce QoS and ability to handle failures during execution. Therefore, an urgent need exists for a dynamic Web Service Composition and Execution (WSCE) framework based on QoS constraints. A WSCE broker is designed to maintain the following function: intelligent web service selection decisions based on local QoS for individual web service or global QoS based selection for composed web services, execution tracking, and adaptation. A QoS certifier controlled by the UDDI registry is proposed to verify the claimed QoS attributes. The authors evaluate the composition plan along with performance time analysis.

scholarly journals Effective Quality Of Service Browsing For Web Service Selection

2021 ◽  
Author(s):  
Shilpi Verma
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
User Study ◽  
Clustering Algorithms ◽  
Service Selection ◽  
Interval Data ◽  
Weighted Clustering ◽  
Web Service Selection

The growing number of Services on the Web has made locating desired Web Services a sizable challenge. Web Service requestors deem a Quality of Service (QoS) based Web Service selection important in terms of providing a relevant and user centric service selection experience. In this thesis an interactive QoS based Web Service browsing mechanism is proposed, which makes use of three clustering algorithms including vector-based, preference-based and weighted clustering. We use symbolic interval data as the principle representation of QoS attributes. The browsing mechanism which was implemented as part of this research allows service requestors to prioritize their search by hierarchically clustering their web services. This is done in order of their preferences and also by attaching a weight to each QoS attribute, which is a beneficial compromise between performance-high preference-based clustering and time-efficient vector-based clustering, Along with several extensive experiments, a user study was conducted in order to test the usability of this browsing mechanism and to test the overall efficiency and performance of the three clustering algorithms in comparison. The result of the experiment led to evidences that preference-based browsing approach was the most efficient one when compared to vector-based or weighted clustering approaches.

scholarly journals Effective Quality Of Service Browsing For Web Service Selection

2021 ◽  
Author(s):  
Shilpi Verma
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
User Study ◽  
Clustering Algorithms ◽  
Service Selection ◽  
Interval Data ◽  
Weighted Clustering ◽  
Web Service Selection

The growing number of Services on the Web has made locating desired Web Services a sizable challenge. Web Service requestors deem a Quality of Service (QoS) based Web Service selection important in terms of providing a relevant and user centric service selection experience. In this thesis an interactive QoS based Web Service browsing mechanism is proposed, which makes use of three clustering algorithms including vector-based, preference-based and weighted clustering. We use symbolic interval data as the principle representation of QoS attributes. The browsing mechanism which was implemented as part of this research allows service requestors to prioritize their search by hierarchically clustering their web services. This is done in order of their preferences and also by attaching a weight to each QoS attribute, which is a beneficial compromise between performance-high preference-based clustering and time-efficient vector-based clustering, Along with several extensive experiments, a user study was conducted in order to test the usability of this browsing mechanism and to test the overall efficiency and performance of the three clustering algorithms in comparison. The result of the experiment led to evidences that preference-based browsing approach was the most efficient one when compared to vector-based or weighted clustering approaches.

Third Party Multimedia Streaming Control with Guaranteed Quality of Service in Evolved Packet System

2013 ◽  
Vol 8 (3) ◽  
pp. 1-21
Author(s):  
Evelina Pencheva
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Web Service ◽  
Multimedia Streaming ◽  
Third Party ◽  
Functional Verification ◽  
Application Server ◽  
Guaranteed Quality ◽  
And Control

This paper studies implementation issues of Parlay X “Multimedia Streaming Control” and “Application-driven Quality of Service” web services in the Evolved Packet System (EPS). EPS is defined as evolution of mobile communication networks with broadband radio interface and Internet Protocol (IP) based core. The main signalling protocols in EPS used for multimedia session management and quality of service control are respectively Session Initiation Protocol (SIP) and Diameter. The functional architecture for third party multimedia streaming control with guaranteed quality of service considers deployment of an application server which exposes web service interfaces toward applications and control protocols toward the network. In a role of mediation functionality, this application server is responsible for the translation between web services interface operations and control protocol messages. In addition, it needs to maintain synchronized state models that reflect both third party application view and protocol view. An approach to automated functional verification of such type of application server providing “Multimedia Streaming Control” and “Application-driven Quality of Service” web service interfaces is suggested. Use cases that illustrate the approach applicability are described.

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