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Multiparty Services in the IP Multimedia Subsystem
No full textEditor: Mohammad Ilyas,
New York 2008TRUEpu
Una Arquitectura para la Protección de la Privacidad de las Comunicaciones
Get PDFSHIP6 is an architecture that aims to enable private communications by preventing eavesdroppers from using network or transport level parameters to correlate packets that belong to the same communication. SHIP6 extends the ability of SHIM6 to vary securely the locators used for a communication. The SHIM6 Context Establishment exchange is protected through the negotiation of Diffie-Hellman keys. A mechanism based in pseudo-random sequences is specified to vary the IP address, along with other relevant parameters of the communication such as transport ports, etc., for an ongoing communication. Additionally, a synchronization mechanism that allows unlimited variation for the parameters considered is presented.TRUEpu
Signalling cases and QoS management within TISPAN NGN residential environments
Get PDFThe TISPAN group from ETSI is currently working on the specification a Next Generation Network (NGN), based on the IP Multimedia Subsystem (IMS) as the service control architecture. This NGN provide a extensible platform that supports the delivering of next generation multimedia services with QoS requirements over multiple access network
technologies. Nevertheless, the QoS solutions developed by
TISPAN in the first release of specifications for the NGN are
mainly focused on the access network, and QoS coverage
is not provided for the core network and the residential
environment, where the end user terminals are located. In
this paper a proposal is presented to extend the TISPAN
QoS solution to the residential environment, by means of
a Residential Gateway (RGW). This RGW will process the signalling messages that are exchanged between the end user
terminals and the Core IMS in the NGN, performing an
adequate QoS resource management within the residential
environment. Several signalling scenarios are presented,
covering the cases related to the establishment and release
of multimedia sessions within the TISPAN NGN. For each
case, the procedures executed in the RGW in respect to the
signalling and QoS management are detailed.TRUEpu
IPv6 Multihoming Support in the Mobile Internet
Get PDFFourth-generation mobile devices incorporate multiple interfaces with diverse access technologies. The current Mobile IPv6 protocol fails to support the enhanced fault tolerance capabilities that are enabled by the availability of multiple interfaces. In particular, established MIPv6 communications cannot be preserved through outages affecting the home address. In this article, we describe an architecture for IPv6 mobile host multihoming that enables transport layer survivability through multiple failure modes. The proposed approach relies on the cooperation between the MIPv6 and the SHIM6 protocols.TRUEpu
QoS and authentication experiences in a residential environment within a broadband access framework
Get PDFIt is sometimes believed that a “broadband access” network,
providing ample transmission capacity to residentia l environments, is enough so
as to allow a flawless delivery of advanced service s. However, the provisioning
of a combination of multiple services with guarante ed quality up to the end-user
terminal requires a carefully designed architecture incorporating the
appropriated Quality of Service (QoS) concepts thro ughout the data path. And
this path includes the Residential Gateway (RGW) as the last hop towards the
home network. This paper describes the different ex periences performed with
the RGW prototype developed within the framework of the European IST
research project MUSE. Special emphasis will be mad e on the QoS capabilities
of the RGW as well as on authentication and auto-con figuration featuresTRUEpu
SHIM6: Mas que Tolerancia a Fallos en IPv6
Get PDFSHIM6 es un protocolo definido para preservar las comunicaciones en caso de fallos entre nodos con
figurados con múltiples direcciones IPv6. En este póster presentamos varias propuestas desarrolladas por los autores con el objeto de obtener otras propiedades adicionales a las inicialmente previstas para SHIM6. Estas propiedades son independencia del proveedor en la conexión a Internet, mejora en la privacidad en las comunicaciones y tolerancia a fallos para nodos móviles.TRUEpu
A broadcasting enabled Residential Gateway for Next Generation Networks
Get PDFTo date, broadcasting traffic data represents a low percentage of the total traffic in the Internet when compared to other kinds of
information. This may be caused by difficulties with multicast transmissions (i.e filtering by ISPs), low bandwidth rates in the last mile access,
quality of service (QoS) and the use of Network Address Translation
(NAT) boxes in SME's and home offices (SOHOs). Research efforts in
Next Generation Networks (NGN) are under way to create networks
with true triple-play capabilities to overcome these problems. Several
standardisation bodies like ITU-T and ETSI have working groups aimed
at developing a general NGN architecture able to transport any type of
traffic with an associated QoS. There are several results available (for
example, ETSI TISPAN has published its Release 1) but there is still
on-going work on different subjects, such as broadcasting transport in
NGNs, where ETSI TISPAN has approved the study of IPTV in NGN as
a high priority issue. This article focuses on the problems and solutions
of a flexible, easily upgradeable broadcast enabled RGW (Residential
Gateway) designed to work in an NGN scenario where multicast traffic,
NAT boxes and QoS must be taken into consideration.TRUEpu
Fault Tolerant Scalable Support for Network Portability and Traffic Engineering
Get PDFThe P-SHIM6 architecture provides ISP independence to IPv6 sites without compromising scalability. This architecture is based on a middle-box, the P-SHIM6, which manages the SHIM6 protocol exchange on behalf of the nodes of a site, which are configured with provider independent addresses.
Incoming and outgoing packets are processed by the P-SHIM6 box, which can assign different locators to a given communication, either when it is started, or dynamically after the communication has been established. As a consequence, changes required for provider portability are minimized, and fine-grained Traffic Engineering can be enforced at the P-SHIM6 box, in addition to the
fault tolerance support provided by SHIM6.TRUEpu
An Architecture for Network Layer Privacy
Get PDFWe present an architecture for the provision of network layer privacy based on the SHIM6 multihoming protocol. In its basic form, the architecture prevents on-path eavesdroppers from using SHIM6 network layer information to correlate packets that belong to the same communication but use different locators. To achieve this, several extensions to the SHIM6 protocol and to the HBA (Hash Based Addresses) addressing model are defined. On its full-featured mode of operation, hosts can vary dynamically the addresses of the packets of on-going communications. Single-homed hosts can adopt the SHIM6 protocol with the privacy enhancements to benefit from this protection against information collectors.TRUEpu
IMS signalling for multiparty services based on network level multicast
Get PDFThe standardization process of the UMTS technology has led to the development of the IP Multimedia Subsystem
(IMS). IMS provides a framework that supports the negotiation
of the next generation multimedia services with QoS requirements that are envisioned for 3G networks. But even though
many of these services involve the participation of multiple users
in a multiparty arrangement, the delivery technology at network
level is still unicast based. This approach is not optimum, in
terms of transmission efficiency. In this paper, a new approach
is presented proposing to use a network level multicast delivery
technology for the multiparty services that are signalled through
IMS. The main advantages and drawbacks related with this
new approach are analyzed in the article. Finally, as a starting
point in the development of the presented solution, a new SIP
signalling dialogue is proposed allowing the negotiation of a
generic multiparty service, and supporting at the same time
the configuration of the corresponding network level multicast
delivery service with QoS requirements that will be used in the
user plane.TRUEpu