IEEE 802.11 based wireless Local Area Networks (WLANs) are fast becoming the standard in homes, businesses, and public hotspots. As well as supporting conventional Internet applications such as email, file transfer and web access, WLANs are increasingly required to support Quality of Service (QoS)-centric applications such as Voice over IP (VoIP) and Video over IP, which are delay sensitive and...

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In Intelligent Transportation Systems new applications based on cooperative approach are being created. These applications are characterized by the real time reconstruction of the driver environment used in combination of on-board sensors and cooperative system information. In this paper, we propose a traffic modeling and 802.11p access categories mapping of three main ITS services: warning to ...

IEEE 802.11e is the enhanced version of the IEEE 802.11 MAC dedicated to provide Quality of Service of wireless network. It supports QoS by the service differentiation and prioritization mechanism. Data traffic receives different priority based on QoS requirements. Fundamentally, applications are divided into four Access Categories (AC). Each AC has its own buffer queue and behaves as an indepe...

The CSMA/CA based random channel access mechanisms in Wireless Mesh Networks(WMNs), IEEE 802.11 DCF and EDCA, are inefficient to eliminate effectively hidden terminal and exposed terminal problems in multi-hop scenarios. In this paper, we propose efficient channel assignment and routing protocols for multi-radio multi-channel (MRMC) wireless mesh networks. These set of protocols are based on La...

Abstract—Wireless communication systems either ad hoc or infrastructure mode the key challenges that must be overcome to realize the practical benefits of Quality of Service (QoS). Generally the QoS is the ability for network element to provide some level of assurance for consistent network data delivery. The ability of Wireless Local Area Network (WLAN) to support real-time services is possibl...

—The video stream transmission over wireless sensor networks is specially required to consider the Quality of Service (QoS), such as low packet loss, low latency and high Peak Signal-to-Noise Ratio (PSNR). In order to improve the performance above, we propose a novel video transmission solution, named Dual Probability Selection Mapping Algorithm (DPSMA). In this solution, by analyzing differen...

In the last decade, both customers and researchers paid attention to wireless video communications applications because they contain abundant and visual information. However, characteristics of wireless networks such as limited resource and fluctuated link quality degrade video transmission quality. In this paper, multiple video streaming in IEEE 802.11e multihop networks is evaluated under dif...

The IEEE 802.11 wireless LAN (WLAN) is the most widely used standard nowadays for wireless LAN technology. However, the current standard does not provide QoS support required by the wide range of end applications (e.g., multimedia communications). Thus, a large number of enhancements to the standard are being proposed. This paper summarizes some of the most relevant schemes and presents a surve...