Deployment of TISPAN/NGN at Brasil Telecom


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  • TISPAN architecture is based on a concept in which various subsystems, among them the IMS and the PES, will communicate through standardized interfaces, with functional elements common to all subsystems. The main elements of the TISPAN architecture are the RACS and the NASS. The main functions of the NASS are: Dynamic provision of IP address and other user equipment configuration parameters (e.g. using DHCP); User authentication, prior or during the IP address allocation procedure; Authorization of network access based on user network profile; Access network configuration, based on user profile; Location management (e.g. for emergency call, …); CPE configuration; NASS provides support for nomadicity and roaming and can be distributed between a visited and home network. With respect to RACS, it is responsible for: Service Based Local Policy Control: It means, authorization of QoS requests and definition of the polices to be enforced by the bearer service network elements. Support for Application Function (AF) including QoS support over multiple access networks (for instance ADSL and GPRS) and CPE types. Apply admission control to resource reservation requests according to network policies. This is applied based on knowledge of transport resource availability over the “last-mile access” and aggregation segments of the access network NAPT/ Gate Control: controls near-end and far-end NAPT and FW functions, when required, between two core TISPAN NGN networks or, at the border between core and access TISPAN NGN networks. Last December, it was concluded TISPAN release 1. The major issues of this release are presented in the next slide.
  • The release 1 focused on PSTN Replacement and Multimedia mainly. It was defined the PES Softswitch and IMS based. Re-use (all or part) of the IMS functional architecture to specify the internal structure of the PSTN/ISDN Emulation subsystem. Driven by IMS/PES commonalities like: Session-based subsystems Network features (Common IP network, QoS, Routing, Charging, Security) Impact due to regulatory requirements Other important points are Real time Voice and Multimedia communication services, includes PSTN Simulation (PSS), it means provide PSTN-like services to IP-Terminals. Messaging (Instant Messaging, MMS), Presence Management Nomadicity/user-controlled Roaming IMS support for Transit Calls Security: Location based; SIP digest in addition to SIP AKA RACS/NASS Secure IMS Core NAT/Firewall Network Asserted Location Supplementary Service – Extend SIP capabilities It was also defined many service requirements.
  • Access Management Function (AMF): traduz sinalização entre o CPE e o NACF/UAAF Network Address Configuration Function (NACF): Alocação de endereço IP e distribuição de outros parâmetros de configuração de rede como um endereço do DNS server, endereçamento de proxies de sinalização para protocolos específicos. Customer Premises Equipment Control Function (CPECF): fornece a informação da configuração além da fornecida pelo NACF. Connectivity Session Location Repository Function (CLF): registra a associação entre a configuração IP, informação específica da linha de acesso e perfil do usuário. Provê mapeamento da informação para o RACS. Provê informação de localização para o core TISPAN NGN User Access Authorization Function (UAAF): executa a autenticação do usuário, bem como a verificação da autorização, baseado em perfis de usuário, para o acesso a rede. Profile Database (PDBF): armazena o perfil de rede do usuário As principais funções do NASS são: Aprovisionamento dinâmico do endereçamento IP e de outros parâmetros de configuração do equipamento do usuário (usando DHCP); Registro e Autenticação do usuário, antes e durante o procedimento de alocação do endereço IP (permitindo nomadismo); Autorização de acesso a rede baseado no profile do usuário; Configuração da rede de acesso, baseada no profile do usuário; Gerenciamento de localização (para chamadas de emergência, …); Configuração do CPE; O NASS provê suporte para nomadismo e roaming e pode ser distribuído entre uma rede visitada e a rede de origem.
  • Service Police Decision Function (SPDF): Provides to AF um ponto único de decisão para autorização de recursos de QoS. Border Gateway Function (BGF): Localizado na borda das redes (acesso/core – core/core), responsável por NAPT, Gate Control, marcação de pacote, medição de uso, policiamento de tráfego Resource Control Enforcement Function (RCEF): Localizado na rede de acesso responsável por Gate control, marcação de pacote, policiamento de tráfego,packe marking, policing. Access-Resource and Admission Control Function (A-RACF): Localizado na rede de acesso responsável pelo controle de admissão e reserva de recursos Controle de admissão no recebimento do pedido de recurso. O RACS mantém um topologia lógica da rede de acesso, assim como mantêm um contador das sessões ativas, (& da banda consumida através da topologia lógica). Assim podemos determinar se a banda está disponível. Provê suporte de QoS para rede fixa BB (as currently no “in-band” resource reservation protocol defined like in the case of 3GPP Access Network, or DOCSIS Cable network). Resource reservation signalling can be: Controle de Serviços baseado em políticas locais: isto significa, autorização de requisições de QoS e garantir que as políticas definidas sejam enviadas aos elementos de rede que fazem parte do serviço. Suporte para o Application Function (AF) incluindo suporte a QoS sobre múltiplas redes de acesso (por exemplo ADSL e GPRS) e múltiplos tipos de CPE. Aplicar o controle de admissão para as requisições de reserva de recursos de acordo com as políticas de rede. Isto é aplicado baseado no conhecimento da disponibilidade de recursos de transporte sobre o last-mile e os segmentos de agregação da rede de acesso. NAPT/ Gate Control: controla as funções de near-end e far-end NAPT e FW entre duas redes TISPAN NGN core ou entre o core e o acesso de redes TISPAN NGN. RACS – Gerencia o QoS management no Acesso ( Assume-se que o Core terá over-provisionig no release 1 )
  • Deployment of TISPAN/NGN at Brasil Telecom

    1. 1. Deployment of TISPAN/NGN at Brasil Telecom November/2006
    2. 2. Sum mary <ul><li>Service convergence demands </li></ul><ul><li>Why to adopt a standard </li></ul><ul><li>Why Brasil Telecom choose TISPAN NGN </li></ul><ul><li>TISPAN NGN Architecture </li></ul><ul><li>Brasil Telecom actions </li></ul><ul><li>Network Planning </li></ul>
    3. 3. Services Services Network Technology and IT Convergence Industry Sector
    4. 4. IPTV WEB Conference MMS Video Conference Games on-line Location Services E-commerce Instant Messenger VoIP MultimediaAdvertising Presence
    5. 5. The 90% Client Don’t See Network The 10% Client See Services
    6. 6. How to build this Network? Adopte a standard
    7. 8. <ul><li>3GPP R4 - separated call control and transport for CS WCDMA networks </li></ul><ul><li>3GPP R5 – first introduction of SIP-based IMS </li></ul><ul><li>3GPP R6 </li></ul><ul><li>3GPP R7 - adds broadband / wireline access capabilities </li></ul><ul><li>3GPP2 – defined CDMA2000 multi-media domain (MMD) based on 3GPP IMS R5 </li></ul><ul><li>TISPAN – defines NGN architecture for fixed access networks </li></ul><ul><li>ITU-T NGN Focus Group – venue to make TISPAN NGN a global spec </li></ul><ul><li>ATIS NGN FG – formally collaborating with ETSI as of April 2005 </li></ul><ul><li>PacketCable Release 2.0 – specifying portions of 3GPP </li></ul>2000 2001 2002 2003 2004 2005 3GPP Rel 4 3GPP IMS Rel 5 3GPP IMS Rel 6 TISPAN R1 3GPP2 MMD ITU-T NGN FG ATIS NGN FG 2006 Packet cable 2.0 3GPP IMS Rel 7 TISPAN R2
    8. 9. Why Brasil Telecom choose IMS/TISPAN NGN <ul><li>TISPAN defines a new telecommunications network for broadband fixed access and facilitates convergence of networks and services. </li></ul><ul><li>IMS/TISPAN provides: </li></ul><ul><ul><li>a multi-service, multi-protocol, multi-access, IP based network - secure, reliable and trusted: </li></ul></ul><ul><ul><ul><li>Multi-services: delivered by a common QoS enabled core network. </li></ul></ul></ul><ul><ul><ul><li>Multi-access: several access networks; fixed and mobile terminals. </li></ul></ul></ul><ul><ul><ul><li>Not one network, but different networks that interoperate seamlessly. </li></ul></ul></ul>
    9. 10. <ul><ul><li>enabler for Service Providers to offer: </li></ul></ul><ul><ul><ul><li>real-time and non real-time communication services; </li></ul></ul></ul><ul><ul><ul><li>between peers or in a client-server configuration; </li></ul></ul></ul><ul><ul><ul><li>interworking towards circuit switched voice. </li></ul></ul></ul><ul><ul><li>Nomadicity and Mobility: </li></ul></ul><ul><ul><ul><li>of both users and devices; </li></ul></ul></ul><ul><ul><ul><li>intra- and inter-Network Domains, eventually between Fixed and Mobile networks </li></ul></ul></ul><ul><li>IMS maintains Service Operator control for signalling & media traffic. </li></ul>Why Brasil Telecom choose ETSI/TISPAN
    10. 11. IMS allows the operator to maintain the service control Network Access Network Transport Internet access Multimedia The IMS allows the Operator to offer differentiate services and controlling by the network Only Service Transportation Internet Network Access Wi-Fi AP IMS Internet Network Access Wi-Fi AP Billing QoS Service creation and New Services Self Provisioning Service Portal Session Control Access control of the service Security and Privacy User Data Control
    11. 12. TISPAN NGN Architecture:
    12. 14. Release 1 – PSTN Replacement & Multimedia - Major Achievements: <ul><li>PSTN Emulation (PES) – Softswitch and IMS based </li></ul><ul><ul><li>Real time Voice/MM communication services </li></ul></ul><ul><ul><ul><ul><li>Messaging (Instant Messaging, MMS), Presence Management </li></ul></ul></ul></ul><ul><ul><li>Nomadicity / user-controlled Roaming </li></ul></ul><ul><ul><li>IMS support for Transit Calls </li></ul></ul><ul><ul><li>Security: Location based; SIP digest in addition to SIP AKA </li></ul></ul><ul><ul><li>RACS/NASS </li></ul></ul><ul><ul><li>Secure IMS Core </li></ul></ul><ul><ul><li>NAT/Firewall </li></ul></ul><ul><ul><li>Network Asserted Location </li></ul></ul><ul><ul><li>Supplementary Service – Extend SIP capabilities </li></ul></ul>
    13. 15. NASS Architecture
    14. 16. RACS Architecture
    15. 18. What are the advantages of being part of an organization which establishes the standards? <ul><li>To protect the investments already realized; </li></ul><ul><li>To avoid wasteful duplication of investments; </li></ul><ul><li>To know the standards deeply; </li></ul><ul><li>To be able to influence the definition of the standards; </li></ul><ul><li>To assure that the characteristics of Brazilian network are taken into consideration. </li></ul>
    16. 19. <ul><li>Brasil Telecom is the founder-member of FMCA. </li></ul><ul><li>It is participating effectively of TISPAN and 3GPP meetings since July 2005. </li></ul><ul><li>It has been presenting contributions to TISPAN work groups, mainly to subjects referring to FMC and network architecture. </li></ul><ul><li>In November 2006, Brasil Telecom hosted the first TISPAN meeting out of Europe. </li></ul><ul><li>Brasil Telecom launched a RFI based in IMS R6 and TISPAN R1 in September 2006. </li></ul>Brasil Telecom’s actions related to international forums
    17. 20. Network Planning <ul><li>There are basically two ways to plan. </li></ul>
    18. 21. Network Planning Market demands to current and future services Information about the existent network Information about the equipments and roadmaps Information about the technical standards CAPEX and OPEX EVA Network Architecture
    19. 22. Market demands to current and future services Information about the existent network Information about the equipments and roadmaps Information about the technical standards Network Time line Network Planning D D-1 D D-2 D-2 D+1
    20. 23. Three years ago… <ul><li>There weren’t Skype, Google Talk, i-Tunes store, Orkut, You Tube etc.; </li></ul><ul><li>Ericsson and Marconi, Alcatel and Lucent, Siemens and Nokia were competitors; </li></ul><ul><li>IMS was a standard only for mobile networks; </li></ul><ul><li>There wasn’t TISPAN; </li></ul><ul><li>The PSTN replacement would be through softswitch. </li></ul>
    21. 24. Thank You! MÁRCIO RODRIGO BORGES [email_address] Tel: +55 61 3415-1307