Robust Adaptive Congestion Control for Next Generation Networks

This paper deals with the problem of congestion control in a next-generation heterogeneous network scenario. The algorithm runs in the 'edge' routers (the routers collecting the traffic between two different networks) with the aim of avoiding congestion in both the network and the edge routers. The proposed algorithm extends congestion control algorithms based on the Smith's principle: i) the controller, by exploiting on-line estimates via probe packets, adapts to the delay and rate variations; ii) the controller assures robust stability in the presence of time-varying delays

ISDN3: The next generation networks

Two generations of Integrated Services Digital Network (ISDN), namely ISDN1 and ISDN2, have been developed in the last century. In our view, the convergence of ATM, Internet and active networks will form the basis for the next generation networks called ISDN3. In this paper, we first review ISDN1 and ISDN2 as well as the Internet and active networks. We then discuss some fundamental questions related to the design of ISDN3. Finally, we compare ISDN3 with ISDN1 and ISDN2, and outline what ISDN3 might look like.published_or_final_versio

Investment in Next Generation Networks and the Role of Regulation: A Real Option Approach

The current regulatory debate in the telecommunications industry in Europe and elsewhere is dominated by the issue of if and how to regulate next generation networks (NGN) which operators plan to roll out in the near future. The crucial issue is whether an extension of current regulatory obligations onto future networks would hamper the investment by large European operators. The paper applies a real option model to explain the investment decision in next generation networks. One important result of the model is that regulation affects the investment decision only in the initial period when uncertainty is still very high. The real option model has been calibrated with parameters drawn from real data for a new entrant and from educated estimates for an established operator. Four different regulatory regimes and their impact on the timing of the investments have been simulated: a temporary regulatory holiday is shown to be an effective regulatory tool in order to induce immediate investments.real options; telecommunication; regulated industries; Next Generation Networks.

Convergence and next generation networks

Convergence and next generation networks and their potential impact on policies and regulations is the subject of this report, covering issues of competition in the new fibre environment, convergence of video, voice and data services, the rapid growth of new technologies, such as HDTV and mobile television, and the related demand for spectrum, as well as new possible "divides" between urban and rural areas created by the uneven development of high-speed fibre networks

Multimedia Traffic Engineering in Next Generation Networks

Due to high speed Internet and Multimedia applications, future wireless communication are expected to support multimedia traffic such as voice, video and text with a variety of Quality of Service (QoS) requirements and make efficient use of radio resources. Such kind of traffic requires high level of QoS guarantees. Traffic management is a process of regulating the traffic over network. Since, multimedia traffic is more sensitive, therefore it requires special measures while transmission, especially in wireless networks. There are different queuing disciplines which are used to police the traffic, the Priority Queue and RIO (RED with In/Out) are queuing disciplines, PQ is used to prioritize the traffic, and the later is used to drop the lower priority packets at the time of congestion. Proposed solution is the integration of Priority Queue with RIO, which will serve as a classifier to prioritize the traffic and then it will also serve as a scheduler by dropping lower priority traffic when the congestion state occur. Simulation results show that by applying proposed Traffic Management Strategy (PriRIO), it assigns stable bandwidth to the Multimedia Traffic Flow and enhances its throughput. It also shows that Packet Losses for Multimedia Traffic are very minor, that is, equivalent to none. Further, delay values for Multimedia traffic also remain below the Best Effort traffic flows. Thus, on the basis of these simulation results and analysis, PriRIO outperforms significantly, as compare to other Traffic Management Strategies