A new multimedia-oriented architecture and protocol for wireless ad hoc networks

Díaz, J.R.; Lloret, Jaime; Jiménez, Jose M.; Hammoumi, Mohammed

doi:10.1504/ijahuc.2014.062486

Cited by 5 publications

(7 citation statements)

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“…In [ 21 ] we presented multimedia-oriented architecture and protocol for wireless ad hoc networks. This proposal takes into account the multimedia services offered by the nodes in the wireless ad hoc network in order to select the best multimedia service provider node at application layer.…”

Section: Related Workmentioning

confidence: 99%

MWAHCA: A Multimedia Wireless Ad Hoc Cluster Architecture

Díaz

Lloret

Jiménez

et al. 2014

The Scientific World Journal

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Wireless Ad hoc networks provide a flexible and adaptable infrastructure to transport data over a great variety of environments. Recently, real-time audio and video data transmission has been increased due to the appearance of many multimedia applications. One of the major challenges is to ensure the quality of multimedia streams when they have passed through a wireless ad hoc network. It requires adapting the network architecture to the multimedia QoS requirements. In this paper we propose a new architecture to organize and manage cluster-based ad hoc networks in order to provide multimedia streams. Proposed architecture adapts the network wireless topology in order to improve the quality of audio and video transmissions. In order to achieve this goal, the architecture uses some information such as each node's capacity and the QoS parameters (bandwidth, delay, jitter, and packet loss). The architecture splits the network into clusters which are specialized in specific multimedia traffic. The real system performance study provided at the end of the paper will demonstrate the feasibility of the proposal.

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Section: Related Workmentioning

confidence: 99%

MWAHCA: A Multimedia Wireless Ad Hoc Cluster Architecture

Díaz

Lloret

Jiménez

et al. 2014

The Scientific World Journal

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“…The aim of this model is to provide the reference framework in order to build an efficient and robust network protocol which can improve QoS and QoE parameters on multimedia transmissions through ad hoc wireless networks. The architecture has been successfully implemented in a wireless ad hoc protocol [13] and tested on IEEE 802.11 networks and wireless sensor networks (WSN) [10].…”

Section: Fault Tolerance In the Multimedia Wireless Ad Hoc Networkmentioning

confidence: 99%

“…The convergence time depends on many factors: topology size, amount of nodes into the cluster, average adjacencies by a node, average distance between nodes, and node settings such as timers. From previous studies performed by us through simulations and real scenarios [10,13], the convergence time can be estimated and it takes values in a wide range of values, on general between one and sixty seconds. For some applications, such as Internet Protocol Television (IPTV) or Video on Demand (VoD), convergence time values around a few seconds can be admissible because the multimedia transmission will be lost for a while but it will be restored quickly.…”

Section: Adding Fault Tolerance To the Mwahca Architecturementioning

confidence: 99%

“…Figure 4 shows the new optimal route, called restored path, for the red multimedia flow, where the number of hops has been minimized (underused nodes were preferred). For the nodes in this new route, a normal resource allocation has been performed following the MWAHCA architecture specifications and the original developed protocol [11,13]. Finally, when the resource reservation for the restored path is completely confirmed, the source gateway node stops sending red multimedia packets over the FSP and starts sending them along the restored path.…”

Section: Fault Tolerant Mechanism Based On a Fast Switching Pathmentioning

confidence: 99%

“…The goal of a good implementation should be a network with low handover and small end-to-end delays for multimedia applications. Packet loss ratios as well as efficient network selection processes will also be enhanced in comparison with other proposals which do not consider these parameters [13].…”

Section: Introductionmentioning

confidence: 99%

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Fault Tolerant Mechanism for Multimedia Flows in Wireless Ad Hoc Networks Based on Fast Switching Paths

Díaz

Lloret

Jiménez

et al. 2014

Mathematical Problems in Engineering

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Multimedia traffic can be forwarded through a wireless ad hoc network using the available resources of the nodes. Several models and protocols have been designed in order to organize and arrange the nodes to improve transmissions along the network. We use a cluster-based framework, called MWAHCA architecture, which optimizes multimedia transmissions over a wireless ad hoc network. It was proposed by us in a previous research work. This architecture is focused on decreasing quality of service (QoS) parameters like latency, jitter, and packet loss, but other network features were not developed, like load balance or fault tolerance. In this paper, we propose a new fault tolerance mechanism, using as a base the MWAHCA architecture, in order to recover any multimedia flow crossing the wireless ad hoc network when there is a node failure. The algorithm can run independently for each multimedia flow. The main objective is to keep the QoS parameters as low as possible. To achieve this goal, the convergence time must be controlled and reduced. This paper provides the designed protocol, the analytical model of the algorithm, and a software application developed to test its performance in a real laboratory.

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