Student Number : 9812990V - MSc project report - School of Electrical Engineering - Faculty of Engineering and the Built Environment / The NGN is a multi-service network which inter-works with the Public Switched Telephone Network (PSTN), the voice network and the data network provided by Internet. Through network independent APIs such as OSA-Parlay, the NGN slowly migrates and converges Telecoms and IT networks, voice and Internet, into a common packet infrastructure. The OSA/Parlay group defines a softswitch architecture which provides network independent APIs or SCFs that enable cross network application development The Parlay softswitch provides connectivity to underlying transport networks for application providers. The standard specifies the interaction between application providers and the softswitch. However, the standard does not specify an interface to regulate the interaction between service providers and the consumer/end user domain. This means that applications housed in the service provider domain have no defined interfaces to manage service delivery to the consumer domain. For most service providers, the lack of a non-standardized API set impedes efforts to decrease application creation and deployment time. This research investigates the design and implementation of a standard consumer interface which can be used by application providers within an OSA/Parlay system to deliver service content to end users. The main objectives with regard to the functionality provided by the interface include the integration of facilities which will assist application providers to manage end user access and authentication (to enable users to establish a secure context for service usage), subscription (to handle the subscription life cycle), and service usage management (to enable the initiation and termination of services). The TINA-Consortium (TINA-C) has developed a service architecture to support the creation and provisioning of services in the NGN. The TINA architecture offers a comprehensive set of concepts and principles that can be used in the design of NGN services. The architecture consists of a set of reusable and interoperable service components encapsulating a rich and well defined set of APIs aimed at supporting the interaction between application providers and consumers. TINA’s session concepts, information structures, interfaces and service components can be used to support the design of a consumer premises end user interface for OSA/Parlay. This research also aims to explore the feasibility of using the TINA API within an OSA/Parlay system to support consumer domain service delivery. In order to implement the consumer interface for Parlay applications, the ability of the TINA service architecture to provide Access and Authentication management; Subscription and Profile management; and Service Usage management was investigated. The report documents the design and implementation of an OSA/Parlay consumer interface utilizing TINA service components and interfaces.

The market for IP telephony has increased over the years, more organizations integrate this technology with their existing networks. The advantages with IP telephony are the possibility to integrate different networks and transfer voice, data and video. However, the technology does not differ from other new technologies when it comes to handling security problems. The risks may increase when voice and data are transferred in the same network. Therefore it is important to elucidate the security aspects for IP networks. This thesis evaluates the technology by performing a comparison between traditional telephony and IP telephony in order to analyze the maintenance and security aspects of these two technologies. The comparison is based on the security services, authentication, integrity, confidentiality, non-repudiation and availability since these are the fundamental security aspects of IP telephony according to the authors. The result of the comparison indicates that IP telephony fulfils the most important security services, i.e. authentication, integrity and confidentiality. The PSTN (Public Switched Telephone Network) is seen as a secure network, because it is closed, e.g. only the operator has access.

The development and research of Artificial Intelligence have had a recent surge in recent years, which includes the medical field. Despite the new technology and tools available, the staff is still under a heavy workload. The goal of this thesis is to analyze the possibilities of a chatbot whose purpose is to assist the medical staff and provide safety for the patients by guaranteeing that they are being monitored. With the use of technologies such as Artificial Intelligence, Natural Language Processing, and Voice Over Internet Protocol, the chatbot can communicate with the patient. It will work as an assistant for the working staff and provide the information from the calls to the medical staff. With the answers provided from the call, the staff will not be needing to ask routine questions every time and can provide help more quickly. The chatbot is administrated through a web application where administrators can initiate calls and add patients to the database.

No description available.

Θα περιγράψουμε τις βασικές λειτουργίες ενός VoIP δικτύου, τα συστατικά του μέρη, καθώς και τα πρωτόκολλα που είναι υπεύθυνα για την εγκατάσταση, τον έλεγχο και τον τερματισμό μιας VoIP υπηρεσίας-συνομιλίας. Τα πρωτόκολλα αυτά ονομάζονται πρωτόκολλα σηματοδοσίας. Τα πρωτόκολλα σηματοδοσίας για VoIP εφαρμογές και ιδιαίτερα το πρωτόκολλο SIP (Session Initiation Protocol) είναι το βασικό θέμα της παρούσας εργασίας. Συγκεκριμένα, έγινε ανάπτυξη ενός SIP User Agent, το λογισμικό του οποίου θα εκτελείται στο δικτυακό επεξεργαστή IXP425 της Intel, μαζί με τα απαραίτητα πρωτόκολλα για την κωδικοποίηση-αποκωδικοποίηση και μετάδοση δειγμάτων φωνής σε μορφή πακέτων δεδομένων. Το αποτέλεσμα αναμένεται να είναι ένα ολοκληρωμένο προϊόν (VoIP phone) για την πραγματοποίηση VoIP κλήσεων. / -

Development and research on Artificial Intelligence have increased during recent years, and the field of medicine is not excluded as a target audience for this top modern technology. Despite new research and tools in favor of medical care, the staff is still under heavy workloads. The goal of this thesis is to analyze and propose the possibility of a chatbot that aims to ease the pressure on the medical staff. To provide a guarantee that patients are being monitored. With Artificial Intelligence, VOIP, Natural Language Processing, and web development, this chatbot can communicate with a patient, which will act as an assistant tool that conducts preparatory work for the medical staff. The system of the chatbot is integrated through a web application where the administrator can initiate call and store clients onto the database. To ascertain that the system operates in real-time, several tests have been carried out to tests concerning the latency between subsystems and the quality of service. / I utvecklingen av intelligenta system har sjukvården etablerat sig som en stor målgrupp. Trots avancerade tekniker så är sjukvården fortfarande under tung belastning. Målet för detta examensarbete är att undersöka möjligheten av en chatbot vars syfte är att lätta på arbetsbelastningen hos sjukvårdspersonalen och samtidigt erbjuda en garanti för att patienter får den tillsyn och återkoppling de behöver. Med hjälp av Artificiell Intelligens, VOIP, Natural Language Processing och webbutveckling kan denna chatbot kommunicera med patienten. Chatboten agerar som ett assisterande verktyg som står för ett förarbete i beslutstagandet för sjukvårdspersonal. Ett systemsom inte bara ger praktisk nytta utan också ett främjande av den utveckling som Artificiell Intelligens gör inom sjukvården. Systemet administreras genom en hemsida som kopplar samman de flera olika komponenterna. Här kan en administratör initiera samtal och spara klienter som ska ringas till databasen. För att kunna fastställa att systemet opererar i realtid har görs flertalet prestandatester avseende både tidsfördröjningar och samtalskvalité.

This Master’s Thesis in Electrical Engineering concerns the introduction of a Parlay gateway in Skanova’s public circuit switched telephone network, what network integrity problems this brings, and how to preserve the integrity of the network. There is a rising demand from the market on Skanova to be able to offer integrated and useful services via their network. Examples of such services are Web Controlled Call Forwarding and Virtual Call Centres. Until now, these services have been implemented with the Intelligent Network concept which is a technology for concentrating the service logic in the telephone network to centralised service platforms within the network operator’s domain. Developing new services in this environment is expensive and therefore, Skanova wants to open the network for third party service providers. The opening of the network is enabled by the introduction of a gateway implementing the open service interface Parlay. The crucial point when opening the network for third party service providers is to maintain the integrity of the network. Parlay is an object oriented Application Programming Interface that enables a third party service access to core network resources in a controlled manner. The authors’ definition of network integrity is: “the ability of a network to steadily remain in a safe state, while performing according to the expectations and specifications of its owner, i.e. delivering the expected functionality and providing means to charge for utilised network resources”. The thesis describes a few services implemented via the Parlay interface and points out examples of activities in these services that may jeopardise the integrity of the network. The described activities belong to one of the two categories: Call Control Functionality or Lack of Charging Instruments. The thesis also describes two important methods for addressing encountered integrity problems. The methods are: Parlay Service Level Agreement and Policy Management.</p> Finally, the solutions are compared and the conclusion is that Policy Management is a conformable and flexible method for addressing lots of integrity problems and that these are important qualities, since new integrity problems will arise all the time.