3 Wlan Qos 3.2.1 Legacy Channel Access Methods 3.2.1.1 Legacy Contention-based Channel Access 3.2.1.2 Legacy Polled Channel Access
نویسنده
چکیده
With both the enterprise and residential sectors embracing voice over IP (VoIP) at an accelerating pace, and the pervasive use of wireless local area networks (WLANs), the natural requirement emerged for a technology to support VoIP over WLANs without degradation of its quality of service (QoS). QoS requirements for WLANs are imposed also by video and multimedia applications tailored for use with WLANs. A QoS-focused MAC Layer standard, IEEE 802.11e, was developed to meet the QoS requirements of a range of applications. In addition to VoIP/ multimedia QoS, the new standard serves mission-critical functions by reducing latency across a WLAN. This chapter discusses the enhancements the new standard adds to WLAN technology with respect to QoS performance, channel use efficiency, and power management of battery-based wireless devices.
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تاریخ انتشار 2007