The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The massive exploitation of P2P networks and the deployment of the video streaming services is bringing significant challenges for the service providers and leading to the network efficiency problem to utilize available network resources. In this paper, we propose an ISP-driven P2P framework that enables the better interaction among the ISPs and the P2P application providers. In this framework, the...
Various distributed multi-source applications such as 3D Virtual Immersive Systems (3DVIS), 2D/3D Videoconferencing, Multi-party games, etc. require the construction of a multicast overlay through which the video blocks are streamed from source to receiver. The most general multicast model involves a single source and a set of receiver nodes also known as multicast set with a single stream to each...
Admission and rate control are key components for providing QoS (Quality of Service) flows in multi- rate wireless ad hoc networks where transmission rate at the physical layer is adapted dynamically according to the channel condition. Key to these controls is the formulation of a rate constraint that can regulate the flow rate passing through each node. This paper formulates a cross-layer rate constraint...
This paper describes how Quality of Service (QoS) support can be introduced to Overlay Multicast in a Chord Peer-to-Peer network. We support the concept of QoS classes (to support various hop-by-hop QoS parameters such as bandwidth requirements) as well as node to root Round Trip Time (RTT) constraints. Our evaluations show that we can guarantee QoS without changing the basic properties of Chord significantly.
There have been several approaches to provisioning traffic between core network nodes in Internet Service Provider networks. Such approaches aim to minimize network delay, increase capacity, and enhance security services. MATE (Multipath Adaptive Traffic Engineering) has been proposed for multipath adaptive traffic engineering between an ingress node (source) and an egress node (destination). Its...
This paper presents an enhanced channel access mechanism for the newly introduced Mesh Deterministic Access (MDA) mechanism for IEEE 802.11s based Wireless Mesh Networks (WMNs). The MDA is an optional scheduled access mechanism which enables mesh nodes to negotiate periodic transmission opportunity (referred to as Mesh Deterministic Access Opportunity (MDAOP)) for a collision free transmission of...
In current wireless networks, channel access is controlled via either a TDMA- or a CSMA-based scheme. While usable in single-hop networks, these techniques are far from optimal and result in significant per-hop and per-packet delay an jitter. This makes multi-hop mesh networks unsuitable for several in-demand applications, including VoIP. We present a new medium access control (MAC) protocol for wireless...
The wide adoption of the P2P networks for the deployment of IPTV services at large scale seems very fascinating. However, it has started exposing the other side of canvas that is not acceptable for the provisioning of QoS for P2P applications. It is even more frustrating for the ISPs due to inefficient utilization of network resources. In this paper, we investigate the conflicting objectives of P2P...
In this paper we propose SWOR, an architecture to deliver Scalable Video Coding (SVC) contents over P2P network. SWOR architecture is based on twofold mechanisms: (1) organization of peers in Small-World (SW) overlay networks, (2) delivering SVC content using push-pull mechanism. SWOR is evaluated and compared with CoolStreaming/DONet (CS) on QoS metrics using NS-2 simulator. Performance evaluation...
With rapid growth of broadband network deployment and multimedia streaming development, IP multicast networks soon become a delivery mechanism for real-time broadcasting television content. Unlike analog television broadcasting, IPTV is to provide two-way interactive service for viewers to access the selected program channel with high quality multimedia presentation and fast channel surfing capability...
Enabling end-to-end quality of service (QoS) for realtime video content delivery across heterogeneous P2P networks is challenging but vital for the efficient service provision. In this paper, we present a P2P based admission control mechanism for real-time video streaming driven by service provider (SP). SP- driven P2P network is a network where service provider has a comprehensive control over contracted...
Due to its bandwidth efficiency, multicast makes a group-centric communication more viable in wireless ad hoc networks with limited radio resources. PIM-SM, a de facto standard multicast protocol known for its high scalability, is a good fit for a large-scale ad hoc network. However, it does not provide a robust multicast communication under RP outage and host mobility. In this paper, we propose a...
In peer-to-peer (P2P) overlay networks, source peers holding multimedia objects can transmit the multimedia objects to receiver peers. In this paper, we discuss parallel types of multi-source streaming (MSS) models where a receiver peer can receive primitive objects of a multimedia object from multiple source peers which can support enough. A multimedia object is realized in a sequence of primitive...
We consider the following basic question: a source node wishes to stream an ordered sequence of packets to a collection of receivers, which are distributed among a number of clusters. A node may send a packet to another node in its own cluster in one time step, whereas sending a packet to a node in a different cluster takes longer than one time step. Each cluster has two special nodes. We assume that...
With the popularity of VoIP, Push-To-Talk (PTT) services over the IP networks have gained their momentum. This research aims at essential design issues for the quality of service of PTT services. We explore the relationship between the speech quality and system design issues. MOS (Mean Opinion Score), which is raised by the ITU-T (International Telecommunication Union) as one of the most common benchmarks,...
In peer-to-peer (P2P) overlay networks, multimedia objects are distributed in peers and source peers transmit a multimedia object to receiver peers. In this paper, we would like to discuss how multiples source peers deliver multimedia objects to receiver peers in a streaming model so that enough quality of service (QoS) required is supported in presence of QoS change. A multimedia object is realized...
In this paper, we propose QoS-constrained peer selection and nondisruptive rate adaptation schemes with considering shared bottleneck problem to provide a stable peer-to-peer live video streaming service during vertical handoff. In the proposed scheme, a QoS-constrained peer is selected by estimating bandwidth with active probing, and a reception rate converges to a stable state without any QoS degradation...
In this paper, we present an admission control mechanism for video streaming driven by service provider (SP) over P2P networks. SP-driven P2P network is a network in which service provider has a comprehensive control over contracted resources utilisation. SP assures the coordination and the creation of overlay P2P network and it is responsible for admission control and resource allocation among others...
Validity of content service on ad hoc networks is significantly affected by the QoS of network and quality of service content. Many current models of content service resolve mainly service selecting and accessing. However, many duplicate services in a heterogeneous environment have often been polluted before service published. Our work proposes an audition model to ensure availability of service content...
Link quality measurement (LQM), i.e. packet reception ratio (PRR) measurement, is becoming an indispensable component in multihop wireless networks. However, in all the existing LQM mechanisms, a common fact is that a node's knowledge about the forward PRR from itself to its neighbor is informed by the neighbor. On the one hand, this receiver- dependent measurement provides accurate and timely updates...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.