31 research outputs found
VoLTE service implementation in EPS-IMS networks
DiplomovĂĄ prĂĄce popisuje VoLTE sluĹžbu, vĂ˝voj a nasazenĂ LTE (zavĂĄdÄcĂ fĂĄzi, skuteÄnĂ˝ LTE stav a vĂ˝hledy do budoucna atd.), EPC-IMS architekturu (popis funkce uzlu, rozhranĂ atd.) Komunikace mezi uzly a funkce, rozhranĂ a protokoly jsou pouĹžĂvĂĄny v prĹŻbÄhu signalizace (SIP SDP) a datovĂ˝ tok (RTCP RTP). PrĂĄce struÄnÄ popisuje zĂĄkladnĂ toky hovorĹŻ, typy nosiÄĹŻ (GBR and N-GBR), a to vytvoĹenĂ / mazanĂ nosiÄĹŻ bÄhem komunikace. DalĹĄĂ ÄĂĄst diplomovĂŠ prĂĄce o implementaci volte, instalace a konfigurace IMS. ZĂĄvÄreÄnĂĄ ÄĂĄst diplomovĂŠ prĂĄce popisuje zkouĹĄky sĂtÄ a, analĂ˝zu protokolu.The master's thesis describes VoLTE service, LTE evolution and deployment (deployment phases, actual LTE state and future perspectives etc.), EPC-IMS architecture (functional node description, interfaces etc.). Communications between nodes and functions, interfaces and protocols which are used during signaling (SIP-SDP) and data flow (RTCP RTP). Thesis briefly describe basic call flows, bearers types (GBR and N-GBR) and their establishment/delete during communication. The next part of master's thesis is about VoLTE implementation solutions, IMS installation and configuration. The final part of master's thesis describes the network and protocols tests, analyzes.
Optimizing IETF multimedia signaling protocols and architectures in 3GPP networks : an evolutionary approach
Signaling in Next Generation IP-based networks heavily relies in the family of multimedia signaling protocols defined by IETF. Two of these signaling protocols are RTSP and SIP, which are text-based, client-server, request-response signaling protocols aimed at enabling multimedia sessions over IP networks. RTSP was conceived to set up streaming sessions from a Content / Streaming Server to a Streaming Client, while SIP was conceived to set up media (e.g.: voice, video, chat, file sharing, âŚ) sessions among users. However, their scope has evolved and expanded over time to cover virtually any type of content and media session.
As mobile networks progressively evolved towards an IP-only (All-IP) concept, particularly in 4G and 5G networks, 3GPP had to select IP-based signaling protocols for core mobile services, as opposed to traditional SS7-based protocols used in the circuit-switched domain in use in 2G and 3G networks. In that context, rather than reinventing the wheel, 3GPP decided to leverage Internet protocols and the work carried on by the IETF. Hence, it was not surprise that when 3GPP defined the so-called Packet-switched Streaming Service (PSS) for real-time continuous media delivery, it selected RTSP as its signaling protocol and, more importantly, SIP was eventually selected as the core signaling protocol for all multimedia core services in the mobile (All-)IP domain. This 3GPP decision to use off-the-shelf IETF-standardized signaling protocols has been a key cornerstone for the future of All-IP fixed / mobile networks convergence and Next Generation Networks (NGN) in general.
In this context, the main goal of our work has been analyzing how such general purpose IP multimedia signaling protocols are deployed and behave over 3GPP mobile networks. Effectively, usage of IP protocols is key to enable cross-vendor interoperability. On the other hand, due to the specific nature of the mobile domain, there are scenarios where it might be possible to leverage some additional âcontextâ to enhance the performance of such protocols in the particular case of mobile networks.
With this idea in mind, the bulk of this thesis work has consisted on analyzing and optimizing the performance of SIP and RTSP multimedia signaling protocols and defining optimized deployment architectures, with particular focus on the 3GPP PSS and the 3GPP Mission Critical Push-to-Talk (MCPTT) service. This work was preceded by a detailed analysis work of the performance of underlying IP, UDP and TCP protocol performance over 3GPP networks, which provided the best baseline for the future work around IP multimedia signaling protocols.
Our contributions include the proposal of new optimizations to enhance multimedia streaming session setup procedures, detailed analysis and optimizations of a SIP-based Presence service and, finally, the definition of new use cases and optimized deployment architectures for the 3GPP MCPTT service. All this work has been published in the form of one book, three papers published in JCR cited International Journals, 5 articles published in International Conferences, one paper published in a National Conference and one awarded patent.
This thesis work provides a detailed description of all contributions plus a comprehensive overview of their context, the guiding principles beneath all contributions, their applicability to different network deployment technologies (from 2.5G to 5G), a detailed overview of the related OMA and 3GPP architectures, services and design principles. Last but not least, the potential evolution of this research work into the 5G domain is also outlined as well.Els mecanismes de SenyalitzaciĂł en xarxes de nova generaciĂł es fonamenten en protocols de senyalitzaciĂł definits per IETF. En particular, SIP i RTSP sĂłn dos protocols extensibles basats en missatges de text i paradigma peticiĂł-resposta. RTSP va ser concebut per a establir sessions de streaming de continguts, mentre SIP va ser creat inicialment per a facilitar lâestabliment de sessions multimèdia (veu, vĂdeo, xat, comparticiĂł) entre usuaris. Tot i aixĂ, el seu Ă mbit dâaplicaciĂł sâha anat expandint i evolucionant fins a cobrir virtualment qualsevol tipus de contingut i sessiĂł multimèdia. A mesura que les xarxes mòbils han anat evolucionant cap a un paradigma âAll-IPâ, particularment en xarxes 4G i 5G, 3GPP va seleccionar els protocols i arquitectures destinats a gestionar la senyalitzaciĂł dels serveis mòbils presents i futurs. En un moment determinat 3GPP decideix que, a diferència dels sistemes 2G i 3G que fan servir protocols basats en SS7, els sistemes de nova generaciĂł farien servir protocols estandarditzats per IETF. Quan 3GPP va començar a estandarditzar el servei de Streaming sobre xarxes mòbils PSS (Packet-switched Streaming Service) va escollir el protocol RTSP com a mecanisme de senyalitzaciĂł. Encara mĂŠs significatiu, el protocol SIP va ser escollit com a mecanisme de senyalitzaciĂł per a IMS (IP Multimedia Subsystem), lâarquitectura de nova generaciĂł que substituirĂ la xarxa telefònica tradicional i permetrĂ el desplegament de nous serveis multimèdia. La decisiĂł per part de 3GPP de seleccionar protocols estĂ ndards definits per IETF ha representat una fita cabdal per a la convergència del sistemes All-IP fixes i mòbils, i per al desenvolupament de xarxes NGN (Next Generation Networks) en general. En aquest context, el nostre objectiu inicial ha estat analitzar com aquests protocols de senyalitzaciĂł multimèdia, dissenyats per a xarxes IP genèriques, es comporten sobre xarxes mòbils 3GPP. Efectivament, lâĂşs de protocols IP ĂŠs fonamental de cara a facilitar la interoperabilitat de solucions diferents. Per altra banda, hi ha escenaris a on ĂŠs possible aprofitar informaciĂł de âcontextâ addicional per a millorar el comportament dâaquests protocols en al cas particular de xarxes mòbils. El cos principal del treball de la tesi ha consistit en lâanĂ lisi i optimitzaciĂł del rendiment dels protocols de senyalitzaciĂł multimèdia SIP i RTSP, i la definiciĂł dâarquitectures de desplegament, amb èmfasi en els serveis 3GPP PSS i 3GPP Mission Critical Push-to-Talk (MCPTT). Aquest treball ha estat precedit per una feina dâanĂ lisi detallada del comportament dels protocols IP, TCP i UDP sobre xarxes 3GPP, que va proporcionar els fonaments adequats per a la posterior tasca dâanĂ lisi de protocols de senyalitzaciĂł sobre xarxes mòbils. Les contribucions inclouen la proposta de noves optimitzacions per a millorar els procediments dâestabliment de sessions de streaming multimèdia, lâanĂ lisi detallat i optimitzaciĂł del servei de Presència basat en SIP i la definiciĂł de nous casos dâĂşs i exemples de desplegament dâarquitectures optimitzades per al servei 3GPP MCPTT. Aquestes contribucions ha quedat reflectides en un llibre, tres articles publicats en Revistes Internacionals amb Ăndex JCR, 5 articles publicats en Conferències Internacionals, un article publicat en CongrĂŠs Nacional i lâadjudicaciĂł dâuna patent. La tesi proporciona una descripciĂł detallada de totes les contribucions, aixĂ com un exhaustiu repĂ s del seu context, dels principis fonamentals subjacents a totes les contribucions, la seva aplicabilitat a diferents tipus de desplegaments de xarxa (des de 2.5G a 5G), aixĂ una presentaciĂł detallada de les arquitectures associades definides per organismes com OMA o 3GPP. Finalment tambĂŠ es presenta lâevoluciĂł potencial de la tasca de recerca cap a sistemes 5G.Postprint (published version
Serviços multimÊdia multicast de próxima geração
Mestrado em Engenharia ElectrĂłnica e TelecomunicaçþesUma das mais recentes conquistas na evolução mĂłvel foi o 3G, permitindo o acesso a serviços multimĂŠdia com qualidade de serviço assegurada. No entanto, a tecnologia UMTS, tal como definida na sua Release â99, ĂŠ apenas capaz de transmitir em modo unicast, sendo manifestamente ineficiente para comunicaçþes multimĂŠdia almejando grupos de utilizadores.
A tecnologia IMS surge na Release 5 do 3GPP que começou a responder jĂĄ a algumas necessidades, permitindo comunicaçþes sobre IP oferecendo serviços Internet a qualquer momento e em qualquer lugar sobre tecnologias de comunicação mĂłveis fornecendo pela primeira vez sessĂľes multimĂŠdia satisfatĂłrias. A Release 6 por sua vez trouxe a tecnologia MBMS que permite transmissĂľes em broadcast e multicast para redes mĂłveis. O MBMS fornece os serviços de aplicaçþes multimĂŠdia que todos estavam Ă espera, tanto para os utilizadores como para os prestadores de serviços. O operador pode agora fazer uso da tecnologia existente aumentando todo o tipo de benefĂcios no serviço prestado ao cliente. Com a possĂvel integração destas duas tecnologias passa a ser possĂvel desenvolver serviços assentes em redes convergentes em que os conteĂşdos sĂŁo entregues usando tecnologias unicast, multicast ou broadcast. Neste contexto, o principal motivo deste trabalho consiste essencialmente em fazer uso dos recursos da rede terminando com o desperdĂcio dos mesmos e aumentando a eficiĂŞncia dos serviços atravĂŠs da integração das tecnologias IMS e MBMS.
O trabalho realizado começa com o estudo do estado da arte das telecomunicaçþes mĂłveis com referĂŞncia Ă s tecnologias referidas, seguindo-se a apresentação da possĂvel integração IMS-MBMS e terminando com o projecto de uma plataforma de demonstração que no futuro possa ser uma implementação de serviço multimĂŠdia multicast. O objectivo principal ĂŠ mostrar os benefĂcios de um serviço que era normalmente executado em unicast relativamente ao modo multicast, fazendo uso da nova convergĂŞncia de tecnologias IMS e MBMS. Na conclusĂŁo do trabalho sĂŁo referidas as vantagens do uso de portadoras multicast e broadcast, tendo como perspectiva de que este trabalho possa ser um ponto de partida para um novo conjunto de serviços poupando recursos de rede e permitindo uma eficiĂŞncia considerĂĄvel em serviços inovadores.3G is bang up to date in the mobile phone industry. It allows access to multimedia services and gives a guarantee of quality of service. The UMTS technology, defined in 3GPP Release â99, provides an unicast transmission, but it is completely inefficient when it comes to multimedia group communications.
The IMS technology first appeared in Release 5 that has already started to consider the interests of the clients. It provides communications over IP, offering Internet services anytime, anywhere on mobile communication technologies. Also, it offers for the first time satisfactory multimedia sessions. On the other hand, Release 6 gave rise to the MBMS technology that provides broadcast and multicast transmissions for mobile networks. The MBMS provides multimedia applications services that everyone was waiting, including users and service providers. Now the operator makes use of existing technology in order to provide better costumer services. The possible integration of these two technologies will contribute to develop services based on converged networks in which contents are delivered through the unicast, multicast or broadcast technologies. Therefore, the objective of this work is basically to make use of network resources avoiding wastes and improving customer services through the integration of the IMS and the MBMS technologies.
The executed work starts with the mobile telecommunications state of the art with reference to the referred technologies, followed by the IMS-MBMS convergence presentation and finishing with the proposal for implementation of a service platform that can be used for a multimedia multicast service. The main point is to show the benefits of a service that has been normally executed in unicast mode over the multicast mode, making use of the new IMS and MBMS technologies integration. To closure the work it is referred the advantages to use multicast and broadcast bearers, with the perspective that this work could be a starting point to a new set of services, saving network resources and allowing for innovate services a considerable efficency
Combining circuit and packet based services in converging networks
Tämän diplomityÜn tavoitteena on tutkia sekä 3GPP:n standardoiman CSICS palvelun ensimmäisen vaiheen toiminnallisuutta että standardointiprosessin tilaa. DiplomityÜssä arvioidaan miten konferenssipalvelu voitaisiin toteuttaa käyttäen ensimmäisen vaiheen CSICS palvelua hyväksi.
TyÜn alussa esitellään 3GPP:n standardointi prosessi, matkaviestinverkon kehitys sekä matkaviestinverkon kannalta tärkeitä standardointi organisaatioita. Tämän jälkeen esitellään ne lisäpalvelut, jotka vaikuttavat CSICS:n toimintaan sekä IMS-palveluympäristÜ. Seuraavaksi käydään läpi julkaistujen 3GPP:n standardien mukainen ensimmäisen vaiheen CSICS-toiminnallisuus. Lopuksi esitellään tunnistetut vaihtoehdot CSICS:ää hyÜdyntävän konferenssipalvelun toteutukseksi sekä vertaillaan esitettyjä vaihtoehtoja toisiinsa. Arviointi on suoritettu kirjallisuustutkimuksena.
Tämän diplomityÜn tuloksena on kuvaus ensimmäisen vaiheen CSICS palvelun toiminnasta sekä arvio 3GPP CSICS:n standardoinnin tämänhetkisestä tilasta. MyÜs ensimmäisen vaiheen CSICS palvelua hyÜdyntävän konferenssipalvelun toteuttaminen on päätelty mahdolliseksi ja tunnistetuista toteutusvaihtoehdoista on valittu toteutettavaksi soveltuvimmat.The aim of this thesis is to study the functionality and the current status of the 3GPP CSICS phase 1 specifications. This thesis also evaluates how the conferencing service could be implemented with the CSICS phase 1 functionality.
First the standardization procedure of the 3GPP, the development of the mobile network and some important bodies involved in the standardization of the mobile network are introduced. Thereafter the supplementary services that have an effect on the CSICS functionality and the IMS are presented. Next the current specifications of 3GPP regarding the CSICS are studied. Last the different approaches of implementing a conference service based on these specifications are evaluated. The evaluation is based on a literature study.
As a result, the functionality described in the CSICS phase 1 specifications and evaluation of the state of the the standardization of the CSICS phase 1 are presented. Also the conference service is determined to be feasible to implement utilising the CSICS phase 1 functionality. From the recognised approaches the most suitable ones for implementation are chosen
Optimizing IETF multimedia signaling protocols and architectures in 3GPP networks : an evolutionary approach
Signaling in Next Generation IP-based networks heavily relies in the family of multimedia signaling protocols defined by IETF. Two of these signaling protocols are RTSP and SIP, which are text-based, client-server, request-response signaling protocols aimed at enabling multimedia sessions over IP networks. RTSP was conceived to set up streaming sessions from a Content / Streaming Server to a Streaming Client, while SIP was conceived to set up media (e.g.: voice, video, chat, file sharing, âŚ) sessions among users. However, their scope has evolved and expanded over time to cover virtually any type of content and media session.
As mobile networks progressively evolved towards an IP-only (All-IP) concept, particularly in 4G and 5G networks, 3GPP had to select IP-based signaling protocols for core mobile services, as opposed to traditional SS7-based protocols used in the circuit-switched domain in use in 2G and 3G networks. In that context, rather than reinventing the wheel, 3GPP decided to leverage Internet protocols and the work carried on by the IETF. Hence, it was not surprise that when 3GPP defined the so-called Packet-switched Streaming Service (PSS) for real-time continuous media delivery, it selected RTSP as its signaling protocol and, more importantly, SIP was eventually selected as the core signaling protocol for all multimedia core services in the mobile (All-)IP domain. This 3GPP decision to use off-the-shelf IETF-standardized signaling protocols has been a key cornerstone for the future of All-IP fixed / mobile networks convergence and Next Generation Networks (NGN) in general.
In this context, the main goal of our work has been analyzing how such general purpose IP multimedia signaling protocols are deployed and behave over 3GPP mobile networks. Effectively, usage of IP protocols is key to enable cross-vendor interoperability. On the other hand, due to the specific nature of the mobile domain, there are scenarios where it might be possible to leverage some additional âcontextâ to enhance the performance of such protocols in the particular case of mobile networks.
With this idea in mind, the bulk of this thesis work has consisted on analyzing and optimizing the performance of SIP and RTSP multimedia signaling protocols and defining optimized deployment architectures, with particular focus on the 3GPP PSS and the 3GPP Mission Critical Push-to-Talk (MCPTT) service. This work was preceded by a detailed analysis work of the performance of underlying IP, UDP and TCP protocol performance over 3GPP networks, which provided the best baseline for the future work around IP multimedia signaling protocols.
Our contributions include the proposal of new optimizations to enhance multimedia streaming session setup procedures, detailed analysis and optimizations of a SIP-based Presence service and, finally, the definition of new use cases and optimized deployment architectures for the 3GPP MCPTT service. All this work has been published in the form of one book, three papers published in JCR cited International Journals, 5 articles published in International Conferences, one paper published in a National Conference and one awarded patent.
This thesis work provides a detailed description of all contributions plus a comprehensive overview of their context, the guiding principles beneath all contributions, their applicability to different network deployment technologies (from 2.5G to 5G), a detailed overview of the related OMA and 3GPP architectures, services and design principles. Last but not least, the potential evolution of this research work into the 5G domain is also outlined as well.Els mecanismes de SenyalitzaciĂł en xarxes de nova generaciĂł es fonamenten en protocols de senyalitzaciĂł definits per IETF. En particular, SIP i RTSP sĂłn dos protocols extensibles basats en missatges de text i paradigma peticiĂł-resposta. RTSP va ser concebut per a establir sessions de streaming de continguts, mentre SIP va ser creat inicialment per a facilitar lâestabliment de sessions multimèdia (veu, vĂdeo, xat, comparticiĂł) entre usuaris. Tot i aixĂ, el seu Ă mbit dâaplicaciĂł sâha anat expandint i evolucionant fins a cobrir virtualment qualsevol tipus de contingut i sessiĂł multimèdia. A mesura que les xarxes mòbils han anat evolucionant cap a un paradigma âAll-IPâ, particularment en xarxes 4G i 5G, 3GPP va seleccionar els protocols i arquitectures destinats a gestionar la senyalitzaciĂł dels serveis mòbils presents i futurs. En un moment determinat 3GPP decideix que, a diferència dels sistemes 2G i 3G que fan servir protocols basats en SS7, els sistemes de nova generaciĂł farien servir protocols estandarditzats per IETF. Quan 3GPP va començar a estandarditzar el servei de Streaming sobre xarxes mòbils PSS (Packet-switched Streaming Service) va escollir el protocol RTSP com a mecanisme de senyalitzaciĂł. Encara mĂŠs significatiu, el protocol SIP va ser escollit com a mecanisme de senyalitzaciĂł per a IMS (IP Multimedia Subsystem), lâarquitectura de nova generaciĂł que substituirĂ la xarxa telefònica tradicional i permetrĂ el desplegament de nous serveis multimèdia. La decisiĂł per part de 3GPP de seleccionar protocols estĂ ndards definits per IETF ha representat una fita cabdal per a la convergència del sistemes All-IP fixes i mòbils, i per al desenvolupament de xarxes NGN (Next Generation Networks) en general. En aquest context, el nostre objectiu inicial ha estat analitzar com aquests protocols de senyalitzaciĂł multimèdia, dissenyats per a xarxes IP genèriques, es comporten sobre xarxes mòbils 3GPP. Efectivament, lâĂşs de protocols IP ĂŠs fonamental de cara a facilitar la interoperabilitat de solucions diferents. Per altra banda, hi ha escenaris a on ĂŠs possible aprofitar informaciĂł de âcontextâ addicional per a millorar el comportament dâaquests protocols en al cas particular de xarxes mòbils. El cos principal del treball de la tesi ha consistit en lâanĂ lisi i optimitzaciĂł del rendiment dels protocols de senyalitzaciĂł multimèdia SIP i RTSP, i la definiciĂł dâarquitectures de desplegament, amb èmfasi en els serveis 3GPP PSS i 3GPP Mission Critical Push-to-Talk (MCPTT). Aquest treball ha estat precedit per una feina dâanĂ lisi detallada del comportament dels protocols IP, TCP i UDP sobre xarxes 3GPP, que va proporcionar els fonaments adequats per a la posterior tasca dâanĂ lisi de protocols de senyalitzaciĂł sobre xarxes mòbils. Les contribucions inclouen la proposta de noves optimitzacions per a millorar els procediments dâestabliment de sessions de streaming multimèdia, lâanĂ lisi detallat i optimitzaciĂł del servei de Presència basat en SIP i la definiciĂł de nous casos dâĂşs i exemples de desplegament dâarquitectures optimitzades per al servei 3GPP MCPTT. Aquestes contribucions ha quedat reflectides en un llibre, tres articles publicats en Revistes Internacionals amb Ăndex JCR, 5 articles publicats en Conferències Internacionals, un article publicat en CongrĂŠs Nacional i lâadjudicaciĂł dâuna patent. La tesi proporciona una descripciĂł detallada de totes les contribucions, aixĂ com un exhaustiu repĂ s del seu context, dels principis fonamentals subjacents a totes les contribucions, la seva aplicabilitat a diferents tipus de desplegaments de xarxa (des de 2.5G a 5G), aixĂ una presentaciĂł detallada de les arquitectures associades definides per organismes com OMA o 3GPP. Finalment tambĂŠ es presenta lâevoluciĂł potencial de la tasca de recerca cap a sistemes 5G
Convergence: the next big step
Recently, web based multimedia services have gained popularity and have proven themselves to be viable means of communication. This has inspired the telecommunication service providers and network operators to reinvent themselves to try and provide value added IP centric services. There was need for a system which would allow new services to be introduced rapidly with reduced capital expense (CAPEX) and operational expense (OPEX) through increased efficiency in network utilization. Various organizations and standardization agencies have been working together to establish such a system. Internet Protocol Multimedia Subsystem (IMS) is a result of these efforts. IMS is an application level system. It is being developed by 3GPP (3rd Generation Partnership Project) and 3GPP2 (3rd Generation Partnership Project 2) in collaboration with IETF (Internet Engineering Task Force), ITU-T (International Telecommunication Union â Telecommunication Standardization Sector), and ETSI (European Telecommunications Standards Institute) etc. Initially, the main aim of IMS was to bring together the internet and the cellular world, but it has extended to include traditional wire line telecommunication systems as well. It utilizes existing internet protocols such as SIP (Session Initiation Protocol), AAA (Authentication, Authorization and Accounting protocol), and COPS (Common Open Policy Service) etc, and modifies them to meet the stringent requirements of reliable, real time communication systems. The advantages of IMS include easy service quality management (QoS), mobility management, service control and integration. At present a lot of attention is being paid to providing bundled up services in the home environment. Service providers have been successful in providing traditional telephony, high speed internet and cable services in a single package. But there is very little integration among these services. IMS can provide a way to integrate them as well as extend the possibility of various other services to be added to allow increased automation in the home environment. This thesis extends the concept of IMS to provide convergence and facilitate internetworking of the various bundled services available in the home environment; this may include but is not limited to communications (wired and wireless), entertainment, security etc. In this thesis, I present a converged home environment which has a number of elements providing a variety of communication and entertainment services. The proposed network would allow effective interworking of these elements, based on IMS architecture. My aim is to depict the possible advantages of using IMS to provide convergence, automation and integration at the residential level
Multimedia in mobile networks: Streaming techniques, optimization and User Experience
1.UMTS overview and User Experience
2.Streaming Service & Streaming Platform
3.Quality of Service
4.Mpeg-4
5.Test Methodology & testing architecture
6.Conclusion
Adaptive header compression techniques for mobile multimedia networks
EThOS - Electronic Theses Online ServiceGBUnited Kingdo