Academic literature on the topic 'Home subscriber server'

Abstract The article describes the architecture and standardization of the IP Multimedia Subsystem (IMS) from the perspective of the new generations of networks (NGN). Further, it discusses the database structure and derives the Home Subscriber Server (HSS) equation to be used for designing the load of this database in two proposed scripts. At the end the article compares the plot of each method and evaluates which method is preferable.

The internet of Things for Smart Home is here to offer convenience in controlling electrical devices or lectronic devices remotely by only giving voice commands that have been integrated with Google Assistant services, now traveling home in uncertain times no longer need to worry about turning on or turn off electrical appliances at home with a smart home. The design of this prototype tool implements lights and fans as electrical devices, in making smart home systems require a microcontroller namely the ESP8266 NodeMCU V3 CH340 module as MQTT Broker protocol, IFTTT as a subscriber, and the publisher Google Assistant using MTTQ (Message Queuing Telemetry Transport) method. MQTT used today is using a free cloud server provided by Adafruit. Based on the results of testing the prototype of the IoT-based smart home control system with the MQTT method using google assistant proved that the number of tests for Relay 1, Relay 2 and Relay 3 is six(6), succeeded 5 and failed 1 then the accuracy of success on Relay 1 testing was 88%. Only by giving the command "Ok Google turn on/off the lamp 1 or turn on/off a fan" to the Google Assistant installed on the Smartphone, lights and fans can be controlled remotely as long as NodeMCU ESP8266 gets an internet network.

Òhe functional architecture of the subsystem picture messaging-IMS (Internet Protocol Multimedia Subsystem) for multimedia session management for multiservice NGN/IMS networks that determine the interaction systems and NGN protocols are investigated. The basic element of the IMS core network architecture are session control function CSCF (Call/Session Control Function) which is implemented on the SIP-server (Session Initiation Protocol) using the protocol. A block diagram of the functioning of the traffic service model of multimedia services in the NGN/IMS network when establishing sessions that use the network elements of the user data server HSS (Home Subscriber Server), CSCF control system core, signaling and media gateways (SGW & MGW, Signaling Gateway & Media Gateway). The characteristics of the effectiveness of the IMS and found that in the NGN / IMS multimedia services network in real time significantly alter the traffic characteristics as a service, and efficiency, which requires new models and approaches to assess the main indicators of quality of the service Triple Play. Based on the analysis of the quality NGN/IMS networks in the provision multimedia services, the mathematical model for evaluating the quality of services. This model takes into account the properties of self-similar random process with Hurst index and describes the quality of functioning of NGN/IMS architectural concept. Based on the model studied when performing voice services with the ability to activate multimedia applications, video telephony, multimedia traffic, Triple Play services. According to the study of mathematical models of NGN / IMS networks using SIP-servers analytical expressions to assess the indicators of a common set of operating characteristics of IP-based networks, which take into account the recommendations of ITU-T Y.1540 and Y.2000 and determined the average waiting time in the queue IMS system in the provision of multimedia services with the required parameters, providing a guaranteed quality of service QoS (Quality of Service). According to the latest recommendations of the ITU-T and based on SMO with queues can be defined by five network characteristics that are indicative of the effectiveness of multi-service NGN/IMS networks and an important indicator of QoS.

Providing IPTV in the IMS network is increasingly a problem solved today. All households are gradually passing through innovation and slowly every equipment becomes the so-called intelligent or smart and can be connected to a private or public network where it can be monitored, configured, diagnosed and then repaired.. This same upgrading takes place in television, and its current output is in the form of IPTV (Internet Protocol Television) provided in the IP Multimedia Subsystem Network, a new generation network that provides both audio and video data. IMS has originated in 1999 for the 3GPP standard in the 5th edition when switching from a 2G network to a 3G network. It has supported the older GSM and GPRS networks, but also a new UMTS network. In the sixth edition, it also has began to work on WLAN networks, more voice-oriented, or speech recognition services. This paper focuses on the provision of IPTV (Internet Protocol Television) in the IMS (IP Multimedia Subsystem) network. The aim of our paper is to design IPTV services in the IMS network, define the IMS architecture and the IMS network components such as HSS (Home Subscriber Server), various types of CSCF (Call State Control Function), describe the functionality and services provided by IMS and IPTV and, finally, compare the quality of the IPTV service provided by our network and by network of selected operator.

This research enhances a home security service with information stations. The service is based on a web-based multiple stations supervisory control framework. A service server (or cloud) kept in a company to serve numerous homes for security monitoring. Arduino controllers are used as home security controllers. An Arduino controller senses door switch, motion detection, smoke detection, gas detection, CO detection, an emergency button, RFID tag, and a spare sensing contact. The controller also drives door lock, two relays to perform security task. RFID is used to help personnel in/out management and alert enable/disable. The controller reads inputs, uploads input/output data to the service server, executes commands from the server, and drives output continuously. Camera servers are added to a house to provide video surveillance. Camera alert events are sent to the service server. Information stations, like earthquake alert station and weather station, are established in the server to provide environmental information. Users can subscribe certain information data and put them in the control laws of the Arduino controllers with condition control. With input/output authorization, the home security of one user is associated with others. Therefore, the whole security service forms a social security group.

This paper describes the architecture, design patterns, and implementation of a Unified Communications Solution (UCS) over a home grown thin implementation of IP Multimedia Subsystem (IMS). This thin-IMS implementation makes use of IMS core components, and can serve as a first step towards migration to full IMS. The unified communications solution offers a rich set of services including duplex VoIP, video conferencing, instant messaging, media sharing, child position tracking, active contacts, and email reading. Subscriber profile is leveraged by a targeted video advertisement preview service as a payment method for calls terminating at landline or mobile networks. Subscribers can also use prepaid service for calls terminating outside of the IP networks. In addition to system and software design patterns, the paper addresses critical deployment issues, such as scalability, NAT traversal, network interconnect, ease of service provisioning and administration, and last but not least, user experience. Finally, the paper contrasts the thin-IMS platform to 3GPP standard IMS release 7 specifications.

Shahal serves over 40,000 cardiac, pulmonary and blood pressure subscribers. The system combines emergency home care and telemedicine in a patient-initiated system geared towards the prevention of cardiac and pulmonary complications. About 150,000 calls are received per year. The median time from onset of symptoms to a call for help is 44 min. It is a unique system which has been shown to facilitate improved home health-care control, enabling patients to manage their own health condition and providing them with a higher quality of life and enhanced peace of mind.

The value of a partnership between teachers and parents in the promotion of children's literacy appears self-evident. It symbolizes both the school's accountability to the community it serves and the complementary responsibility of families to support the school's agenda of empowering their children with the tools of civilization. Many parents and teachers across the world perceive, however, that there is something amiss with the relations between them. On the one hand, they share an interest in the literacy development of the same children, and in some sense, they subscribe to an implicit contract to share responsibility for promoting it. Yet, disagreement frequently arises about how this contract is to be executed in practice. In this eclectic review of research, I consider three complementary ways in which the nature of the connection between children's homes and the schools they attend can be problematized, each focusing on a different criterial dimension for evaluating the home-school connection: (a) congruence of family life with the agenda of schooling, (b) intimacy, or depth of understanding, between teachers and parents, and (c) sociocultural productivity of the interaction between the school and its students' home communities.

The goal of this paper is to identify all the essential costs of building broadband access networks, and then to comparise different technologies in various scenarios. Different market segments (Scenarios) have different geographical characteristics and will require different amounts of access bandwidth. These different market segments will be served by alternative access technologies that minimise overall costs. In order to do this, we have developed a model framework and an evaluation tool. To measure the attractiveness of several broadband access technologies, the proposed tool compares the costs, revenues, NPV, IRR, payback periods etc for 3 scenarios. The paper presents a techno‐economic analysis of 8 broadband technologies for access networks: digital subscriber line (DSL), hybrid fibre coax (HFC), power line communications (PLC), fibre to the home (FTTH), fibre to the curb (FTTC), fibre to the cabinet (FTTCab), and wireless alternatives such as WiMAX and satellite.

The system test is very significant in the development life cycle of a telecommunication network node. Tools such as TITANSim are used to develop the test framework upon which a load test application is created. These tools need to be highly efficient and optimized to reduce the cost of the system test. This thesis project created a load test application based on the distributed scheduling architecture of TITANSim, whereby multiple users can be simulated using a single test component. This new distributed scheduling system greatly reduces the number of operating system processes involved, thus reducing the memory consumption of the load test application; hence higher loads can be easily simulated with limited hardware resources. The load test application used for system test of the HSS is based on the central scheduling architecture of TITANSim. The central scheduling architecture is a function test concept, where every user is simulated by a single test component. In the system test several thousand users are simulated by the test system. Therefore, the load application based on central scheduling architecture uses thousands of test components leading to high memory consumption in the test system. In this architecture, the scheduling of test components is centralized which results in a lot of communication overhead within the test system, as thousands of test components communicate with a master scheduling component during the test execution. On the other hand, in the distributed scheduling architecture the scheduling task is performed locally by each test component. There is no communication overhead within the test system. Therefore, the test system is highly efficient. In the distributed scheduling architecture the traffic flow of the simulated users are described using the Finite State Machines (FSMs). The FSMs are specified in the configuration files that are used by the test system at run time. Therefore, implementing traffic cases using the distributed scheduling architecture becomes simpler and faster as there is no (TTCN-3) coding/compilation. The HSS is the only node (within Ericsson) whose system test is performed using the central scheduling architecture of TITANSim. The other users (nodes) of TITANSim are using the distributed scheduling architecture for its apparent benefits. Under this circumstance, this thesis project assumes significance for the HSS. When a decision to adapt the distributed scheduling architecture is made for the system test of the HSS, the load application created in this thesis project can be used as a model, or extended for the migration of the test modules for the HSS from the central scheduling architecture to the distributed scheduling architecture. By creating this load application we have gained significant knowledge of the TITANSim framework; most importantly, the necessary modifications to the TITANSim framework required to create a distributed scheduling architecture based load application for the HSS. The load application created for this project was used to (system) test the HSS by generating load using real system test hardware. The results were analytically compared with the test results from the existing load application (which is based on the central scheduling architecture). The analysis showed that the load application based on distributed scheduling architecture is efficient, utilizes less test system resources, and capable of scaling up the load generation capacity
Systemet test är mycket betydelsefullt i utvecklingen livscykeln för ett telenät nod.Verktyg som TITANSim används för att utveckla testet ram på vilken ett belastningsprov program skapas. Dessa verktyg måste vara mycket effektiv och optimerad för att minska kostnaderna för systemet testet. Detta examensarbete skapat ett program belastningsprov bygger på distribuerad schemaläggning arkitektur TITANSim, där flera användare kan simuleras med hjälp av ett enda test komponent. Det nya distribuerade schemaläggning systemet minskar kraftigt antalet operativsystem inblandade system processer, vilket minskar minnesförbrukning av lasten testprogram, därav högre belastningar kan enkelt simuleras med begränsade hårdvara resurser. Lasten testa program som används för systemtest av HSS är baserad på den centrala schemaläggning arkitektur TITANSim. Den centrala schemaläggning arkitektur är ett funktionstest koncept, där varje användare simuleras med ett enda test komponent. I systemet testa flera tusen användare är simulerade av testsystemet.Därför använder belastningen program baserat på centrala schemaläggning arkitektur tusentals testa komponenter leder till hög minnesförbrukning i testsystemet.I denna arkitektur är schemaläggning av test komponenter centraliserad vilket resulterar i en mycket kommunikation overhead inom testsystem, som tusentals testa komponenter kommunicerar med en mästare schemaläggning komponent under testexekvering. Å andra sidan, i den distribuerade schemaläggning arkitekturen schemaläggning uppgiften utförs lokalt av varje test komponent. Det finns ingen kommunikation overhead i testsystemet. Därför är testsystemet mycket effektiv. I distribuerad schemaläggning arkitekturen trafikflödet av simulerade användare beskrivs med Finite State Machines (FSMs). Den FSMs anges i konfigurationsfiler som används av testsystemet vid körning. Därför genomföra trafiken fall med distribuerad schemaläggning arkitektur blir enklare och snabbare eftersom det inte finns någon (TTCN-3) kodning / sammanställning. HSS är den enda nod (inom Ericsson) vars system test utförs med hjälp av den centrala schemaläggningen arkitektur TITANSim. Den andra användare (noder) i TITANSim använder distribuerad schemaläggning arkitektur för sina uppenbara fördelar. Under denna omständighet, förutsätter detta examensarbete betydelse för HSS. När ett beslut att anpassa distribuerad schemaläggning arkitektur är gjord för systemet test av HSS, kan belastningen program som skapats i detta examensarbete kan användas som en modell, eller förlängas för migration av testet moduler för HSS från den centrala schemaläggningen arkitektur för distribuerade schemaläggning arkitektur. Genom att skapa denna belastning ansökan har vi fått stor kunskap om TITANSim ramen, viktigast av allt, de nödvändiga ändringar av TITANSim ramverk som krävs för att skapa en distribuerad schemaläggning arkitektur baserad belastning ansökan för HSS. Lasten program som skapats för detta projekt har använts för att (system) testa HSS genom att generera last använda riktiga maskinvarusystem test. Resultaten analytiskt jämfört med provresultaten från den befintliga belastningen ansökan (som är baserad på den centrala schemaläggning arkitektur). Analysen visade att belastningen ansökan baseras på distribuerad schemaläggning arkitektur är effektiv, använder mindre resurser testsystem, och kan skala upp kapaciteten last generation

Next generation heterogeneous wireless networks are expected to interwork with Internet Protocol (IP)-based infrastructures. Conventional network services operate like silos in that a specific set of services are offered over a specific type of access network. As access networks evolve to provide IP-based packet access, it becomes attractive to break these “service silos” by offering a converged set of IP-based services to users who may access these services using a number of alternative access networks. This trend has started with third generation cellular mobile networks, which have standardized on the use of the IP Multimedia Subsystem (IMS) to manage user access to a wide variety of multimedia services over the mobile Internet, while facilitating interworking of heterogeneous wireless and landline access networks. The future users of communication systems will subscribe to both IP-based and Circuit Switched (CS) based services and in the foreseeable future a single database that handles user profiles across all domains will be required. Home Subscriber Server (HSS) as an evolved version of Home Location Register (HLR) is one of the key components of IMS. In deploying HSS as a central repository database, in a fully overlapped heterogeneous network setting, changes of access mode are very frequent and conveying this information to HSS imposes excessive signaling load and delay. In our proposed scheme we introduce an Interface Agent (IA) for each location area that caches the location and information about the access mode through which a user can be reached. This method results in significant amount of savings in signaling cost and better delay performance. The existing call delivery approaches in cellular networks may not be well suited for future communication systems because they suffer from unnecessary usage of network resources for call attempts that may fail which adds to excessive signaling delays and queuing costs. Reducing the number of queries and retrievals from the database will have a significant impact on the network performance. We present a new scheme based on Reverse Virtual Call setup (RVC) as a solution to the call delivery problem in heterogeneous wireless networks and evaluate the performance of this framework.

This Master’s thesis deals with IMS architecture problems. This thesis describes its creation and progress, also structure of this architecture is mentioned. Text of this thesis describes function of the most important parts of the architecture, such as Proxy-CSCF, Interrogating-CSCF, Serving-CSCF and HSS. IMS architecture uses SIP protocol for establishment, maintenance and closing session and Diameter protocol for network management functions. That is why this thesis also describes characteristics of these two protocols. Next part of the thesis is focused on Open-source platform Open IMS Core and its installation. Open IMS Core platform was developed for testing IMS technologies within an internal project at the Fraunhofer Institute FOKUS in Berlin. Nowadays it is used by major part of vendors and providers for testing their products and services. As a main theme of this thesis, there was made a simple network, which consists of three users. This network is established on fundamentals of IMS and it was made in Open IMS Core. So in one chapter is outlined a process of its creation. There is described a process of adding a user list to database server HSS. In the next part there are mentioned some information about setup of virtual IMS terminal. Eventually there are shown some possibilities of how to catch traffic in the network. In this chapter there are also state diagrams, which describe a process of registration of IMS terminal and also a process of establishment, maintenance and closing session.

碩士
國立宜蘭大學
電子工程學系碩士班
100
IP Multimedia Subsystem play an important role for the next generation of fixed and mobile network, with network broadband the popularity and data transfer rate, the network service nature is gradually changing. Service providers need new integrated network infrastructure meet the needs of users. In order to establish long-term application to meet the future bandwidth services, next-generation network is proposed as the core, mainly to packet-switched. The key technologies of the control layer in NGN, IP multimedia subsystem become the next generation of fixed and mobile network convergence architecture to meet user demand and provide a variety of services. Amount of IMS Bench SIPp tool measured centralized and distributed IP Multimedia Subsystem architecture, IP multimedia subsystem overloading clarify the cause and the cause of the delay element, and propose a cache to develop methods and mechanisms to implement to the domicile of the user servo element, so that the components extracted data to reduce to the main memory and disk access caused by load and delay, and effectively improve the overall IMS performance.

Η παρούσα διπλωματική εργασία είναι η υλοποίηση σε λογισμικό του Home Subscriber Server (HSS). Ο HSS είναι ένας εξυπηρετητής ζωτικής σημασίας για το IP Multimedia Subsystem (IMS). Αποτελεί την κύρια βάση του δικτύου που περιέχει σημαντικές πληροφορίες για τους χρήστες και επιτελεί, μαζί με κάποιες άλλες οντότητες,την πιστοποίηση και την εξουσιοδότηση των χρηστών, που επιθυμούν να χρησιμοποιήσουν το IMS δίκτυο.
This thesis is the software implementetion of a Home Subscriber Server (HSS). The HSS is a server vital for IP Multimedia Subsystem (IMS). It is the main basis of the network which contains important information for users and it performs, along with some other entities, certification and authorization of users who wish to use the IMS network.

Tara, a twenty-seven-year-old classically trained pianist with a masters degree in music, subscribes to the Tin Pan Alley method of music production, conceptualizing the song as a distinct entity from the recording. In search of a more polished sound than she has been able to achieve recording herself with Logic, Tara hired a friend of a friend to serve as the sound engineer for a week of home recording sessions. Battling the unflattering acoustics of a concrete loft apartment, noisy neighbors, the unapologetic New York subway, the trappings of perfectionism, and the creeping resentment that stems from communication breakdowns, Tara questioned if she would be better off going to a professional recording studio, but persevered to see her project through to the stage of mixing.

The “Little Readers’ Circle” was born as an attempt to encourage reading in a class of young adolescents. One of the authors worked in a middle school that served a socially and economically weak area in the North of Italy. The class, in its first year at the school, was composed of 11-to-12-year-olds. Over the course of a school year, one hour a week was spent sharing what had been read at home, presenting books that had been particularly loved, writing quotes on a dedicated poster, reading out favourite passages. Thanks to a well-organised school library and to enthusiastic support staff, all children could access books, some of them reading three books a month. Many even subscribed to the City Library to be able to continue reading over school holidays.

Cryptography has been used since ancient times in many different shapes and forms to protect messages from being intercepted. However, since 1976, cryptography started to be part of protected public communication when e-mail became commonly used by the public. Webmail (or Web-based e-mail) is an e-mail service intended to be primarily accessed via a web browser, as opposed to through an e-mail client, such as Microsoft Outlook, Mozilla‘s Thunderbird Mail. Very popular webmail providers include Gmail, Yahoo! Mail, Hotmail and AOL. Web based email has its advantages, especially for people who travel. Email can be collected by simply visiting a website, negating the need for an email client, or to logon from home. Wherever a public terminal with Internet access exists one can check, sends and receive email quickly and easily. Another advantage of web based email is that it provides an alternate address allowing user to reserve his/her ISP address for personal use. If someone would like to subscribe to a newsletter, enter a drawing, register at a website, participate in chats, or send feedback to a site, a web based email address is the perfect answer. It will keep non-personal mail on a server for you to check when you wish, rather than filling up your private email box. Web service is defined as “a software system designed to support interoperable machine-to-machine interaction over a network”. Web services are frequently just Internet application programming interfaces (API) that can be accessed over a network, such as the Internet, and executed on a remote system hosting the requested services. Other approaches with nearly the same functionality as web services are Object Management Group‘s (OMG) Common Object Request Broker Architecture (CORBA), Microsoft‘s Distributed Component Object Model (DCOM) or SUN‘s Java/Remote Method Invocation (RMI). Integrating Encryption with web service could be performing in many ways such as: XML Encryption and XML Signature. In this article we present client and Web-based E-mail, next generation E-mail and secure E-mail, followed by cryptography in web service and the last part is the future of web service security. The article start with the integration of cryptography with E-mail client and web base then the integration of cryptography and web service is presented. At the end of the major two sections: e-mail service and web service there is a general prospect vision of encryption future for e-mail service and web service. This section presents our view for the cryptography integration with the second generation of e-mail and web service.