عنوان المقالة:Review on QoS provisioning approaches for supporting video traffic in IEEE802.11e: challenges and issues Review on QoS provisioning approaches for supporting video traffic in IEEE802.11e: challenges and issues
MOHAMMED A. AL-MAQRI, MOHAMED A. ALRSHAH, AND MOHAMED OTHMAN
English Authors
MOHAMMED A. AL-MAQRI, MOHAMED A. ALRSHAH, AND MOHAMED OTHMAN
Abstract
Recently, the demand for multimedia applications is dramatically increased, which in turn
increases the portion of video traffic on the Internet. The video streams, which require stringent Quality
of Service (QoS), are expected to occupy more than two-thirds of web traffic by 2019. IEEE802.11e
has introduced HCF Controlled Channel Access (HCCA) to provide QoS for delay-sensitive applications
including highly compressed video streams. However, IEEE802.11e performance is hindered by the
dynamic nature of Variable Bit Rate (VBR) video streams in which packet size and interval time are
rapidly fluctuating during the traffic lifetime. In order to make IEEE802.11e able to accommodate with
the irregularity of VBR video traffic, many approaches have been used in the literature. In this article, we
highlight and discuss the QoS challenges in IEEE802.11e. Then, we classify the existing QoS approaches in
IEEE802.11e and we also discuss the selection of recent promising and interesting enhancements of HCCA.
Eventually, a set of open research issues and potential future directions is presented.
Abstract
Recently, the demand for multimedia applications is dramatically increased, which in turn
increases the portion of video traffic on the Internet. The video streams, which require stringent Quality
of Service (QoS), are expected to occupy more than two-thirds of web traffic by 2019. IEEE802.11e
has introduced HCF Controlled Channel Access (HCCA) to provide QoS for delay-sensitive applications
including highly compressed video streams. However, IEEE802.11e performance is hindered by the
dynamic nature of Variable Bit Rate (VBR) video streams in which packet size and interval time are
rapidly fluctuating during the traffic lifetime. In order to make IEEE802.11e able to accommodate with
the irregularity of VBR video traffic, many approaches have been used in the literature. In this article, we
highlight and discuss the QoS challenges in IEEE802.11e. Then, we classify the existing QoS approaches in
IEEE802.11e and we also discuss the selection of recent promising and interesting enhancements of HCCA.
Eventually, a set of open research issues and potential future directions is presented.
أستاذ مساعد د. محمد الهادي الرشاح | Assist. Prof. Dr. Mohamed A. Alrshah | 23059