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On real-time video streaming, the distribution with multi-tree Application Level Multicast (ALM) is effective in terms of delay and jitter. In constructing multi-tree networks, a joining node selects counterpart nodes based on their performance or bandwidth capacity and they are connected each other. However, tree-based ALM has the overhead of reconstructing the tree topology when any node leaves...
The paper proposes an FPGA-like approach to on-chip communication and comes up with a design methodology where switches are avoided and where two any IPs are connected if and only if they are communicating. It avoids the problem of costly (time, area, energy) intermediate hop counts of on-chip networks (NOCs) between any two source-destination pairs. The second novelty is that without knowing the...
In this paper, the first results to show the power, bandwidth and RMS delay spread of an intra-vehicle optical wireless communication system from a passenger perspective are presented. This work builds upon a previous investigation of ours which had demonstrated potential for optical wireless deployment within a vehicle as a potential competitor to RF based systems. By now incorporating the presence...
The character of the input flow changes with an increasing amount of multimedia services. The most common classical stochastic models suppose an exponential distribution of interarrival times, i.e. the Poisson input flow. This paper shows the significant influence of probability distribution functions of interarrival times, such as the exponential, the hyper-exponential and the Erlang's of the order...
Over 40 research projects are currently on-going worldwide aimed at designing the new architecture of the Internet. One of these projects — System IIP led in Poland — covers a wide spectrum of issues including network technologies, architectures, virtualization aspects, and applications. In this paper, we focus on implementation issues of network resource provisioning in System IIP, as well as on...
This paper proposed a coding mode selection method for video transmission over wireless networks. Unlike previous mode selection methods disregarding channel distortion or assuming constant packet loss rate (PLR), this method includes a cross-layer controller to collect both source and channel information. The mode selection process is formulated as a delay constrained distortion minimization problem...
Most user terminals or Internet hosts are equipped with two or more interfaces that can simultaneously be attached to different access networks. These multihomed hosts can offer ubiquitous and cost-effective connectivity, while improving resiliency and bandwidth. Each interface would get an address (or locator) from the edge network to which it attaches. Thus the multihomed host has multiple locators...
The integrated architecture of complementary Ethernet Passive Optical Network (EPON) and Worldwide Interoperability for Microwave Access (WiMAX) technologies combine the benefits of optical fiber capacity and wireless network mobility, which will become one of the promising broadband access technologies for next-generation network. In this paper, we propose a novel hybrid dynamic bandwidth allocation...
We propose a novel cost-effective architecture of passive optical network (PON), which can support multiple optical line terminals (OLTs). We also propose Guaranteed Limited Dynamic Bandwidth Allocation (GLDBA) scheme for flexibly managing downstream bandwidth among multiple OLTs. For upstream transmission in the proposed multi-OLT PON system, we modify Limited Dynamic Bandwidth Allocation (LDBA)...
In this paper, we propose photonic crystal waveguide structure to attain enhanced slow light performances by carrying out various optimizations on a regular triangular lattice photonic crystal. While residing at a moderate slow down factor (group index), the investigated structure provides a very large delay bandwidth product factor. This value outperforms the previously declared numbers available...
Swarm intelligence inspired by the social behavior of ants boasts a number of attractive features, including adaptation, robustness, decentralized and self-organizing nature, which are well suited for routing in modern communication networks. This paper describes a new adaptive dynamic routing algorithm for packet-switched communications networks based on simple biological “ants” that explore the...
Five types of service flows are defined in the standard of IEEE 802.16. Each service flow has its own type of quality of service (QoS) requirement. Some scheduling algorithm is needed to satisfy the QoS requirement of each class. Traditional base station (BS) allocates bandwidth according to the request of user. However, the request may not equal to the real requirement in some situation. Thus, the...
This document is written to give the chronology of technological evolution at IIT Bombay in Distance Education activity. Various technologies used are described in brief. The next technology have emerged out of some need that was unfulfilled in the previous technology used. A glimpse of future technologies likely to be used in distance learning are mentioned. The impact of distance education on different...
An improved algorithm for arterial traffic coordinated control was described, The algorithm used optimization of the maximum bandwidth for the upper target, and used the optimization of the minimum delay of the turning traffic flow for the lower target, to get the best phase difference. A mixed integer linear programming was built based on MAXBAND method. And evaluation result using Vissim simulation...
Increased commodity use of mobile devices has the potential to enable mission-critical monitoring applications. However, these mobile-enabled monitoring applications have to often work in environments where a delay-tolerant network (DTN) is the only feasible communication paradigm. Detection of complex (composite) events is fundamental to monitoring applications. However, the existing plan-based CED...
Secure Shell (SSH) is a multi-channel security protocol running over the Transmission Control Protocol (TCP), which offers channels for several services over a secured connection, such as remote shells and connection forwarding. In this paper we introduce a method for using SSH over the Stream Control Transmission Protocol (SCTP), a transport protocol supporting multi-homing and multi-streaming. We...
We propose and evaluate a novel energy and delay efficient OFDMA-based master medium access control (MAC) framework — the meta-MAC — for heterogeneous coexistence in next-generation PON, featuring both low computational complexity and low end-to-end packet delay.
We propose the Most-Emergent-First (MEF) scheduler which regard the emergency score obtained from the delay status and traffic specification (TSPEC) to determine transmit sequence of flows. Via cross-layer signaling, transmission opportunities (TXOPs) of flows are dynamically adjusted to meet the TSPEC while the bandwidth utilization in a IEEE 802.11e environment is maintained. The proposed prioritized...
How to provide quality of service (QoS) guarantees in routing and switching systems has become one of the key research topics in the areas of routing and switching technologies. Differentiated services architecture (DiffServ) is known as a promising way for supporting QoS in a high-speed backbone network scenario. However, the measurement indexes for realtime multimedia traffic, which plays very important...
Most home computers have upload bandwidths that do not allow them to stream good quality video. As a result, they cannot fully participate in peer-to-peer video streaming solutions. We propose to address that issue by letting these clients use the storage space they have on one or more remote servers. Each time a client plays a streaming video, it will upload a copy of that video to one of these servers...
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