IP-based access networks for broadband multimedia services

Abstract

The increasing demand of new services and applications is pushing for drastic changes in the design of access networks for residential and SOHO users. Future access networks will provide full service integration, resource sharing at the packet level and QoS support. It is expected that using IP as the base technology, the ideal plug-and-play scenario, where the management actions of the access network operator are kept to a minimum, will be achieved easily. In this paper we start by giving an historical perspective of the evolution of access networks. We then describe an IP-based architecture targeted for the integrated support of broadband multimedia services, and designed to be low-cost and easily manageable. We illustrate the different phases of a multimedia Internet access session, when using SIP for session initiation, COPS and DIAMETER for QoS policy management and AAA and RSVP for resource reservation.

SIP-based multimedia conference system design and implementation

“…These interactive messages can be divided into three categories : the first is that the device management subsystem to send device control command to the MCU subsystem through the TCP packet ; the second is that the device management subsystem to query the current device status to the MCU subsystem through the TCP packet [4] ; the third is that the MCU subsystem report device information to the device management subsystem through the TCP packet .…”

Pricing the Internet With Multibid Auctions

“…What we represent by a link actually means the resource that has to be shared among users to reach the next point to the backbone; the first link is frequently a copper Digital Subscriber Line (DSL) connection, or a Local Area Network (LAN) with CSMA/CD, or a WLAN, which may be connected to the backbone via a wired or wireless link (802.16 WMAN for instance) 1 . As an example of topology for the upstream links, the tree-topology advocated in [19] relies on a two-level hierarchy of Synchronous Digital Hierarchy (SDH) rings, where residential users are connected to a second-level ring on xDSL over copper, while business users can be connected directly to the primary ring by SDH fiber connection. The authors argue that this tree topology simplifies a number of functions such as routing and addressing.…”

“…Indeed, each access network can be modeled this way, as described in [17]: customers are not directly connected to high-speed backbone networks, but rather to "local" access networks, which are then connected to regional networks, themselves being connected to national backbone networks. There exist several justifications in the literature to use this tree topology for access networks, for instance in the case of reliability versus costs trade-off [18] or in [19], where an IP-based architecture for broadband multimedia services is described. It is for instance shown in [18] that the tree topology reduces financial and engineering costs for access networks.…”

“…Nevertheless, we include them in this paper to make it self-contained. The tree-topology assumption made in this paper, that we believe to hold in the Internet (see [19]), significantly simplifies the allocation problem compared to a general network where routing also has to be taken into account, or to loop-free networks where the allocations on all links interact. Nevertheless, this model highlights new difficulties: in particular the mechanism has to ensure that no bandwidth is spared, i.e.…”

Deployment of service aware access networks through IPv6

“…The need for an IP-aware access network for tripleplay services is raised by both S. White et al [5] and S. Sargento et al [6]. However, both papers approach the issue from a QoS and application perspective, rather than from an IPv6 point of view.…”