Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guia Do Desenho
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Enterprise Mobility 4.1 Design Guide
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Chapter 5 Cisco Unified Wireless QoS
Wireless QoS Deployment Schemes
Wireless QoS Deployment Schemes
In the past, WLANs were mainly used to transport low-bandwidth, data-application traffic. Currently,
with the expansion of WLANs into vertical (such as retail, finance, and education) and enterprise
environments, WLANs are used to transport high-bandwidth data applications, in conjunction with
time-sensitive multimedia applications. This requirement led to the necessity for wireless QoS.
with the expansion of WLANs into vertical (such as retail, finance, and education) and enterprise
environments, WLANs are used to transport high-bandwidth data applications, in conjunction with
time-sensitive multimedia applications. This requirement led to the necessity for wireless QoS.
Several vendors, including Cisco, support proprietary wireless QoS schemes for voice applications. To
speed up the rate of QoS adoption and to support multi-vendor time-sensitive applications, a unified
approach to wireless QoS is necessary. The IEEE 802.11e working group within the IEEE 802.11
standards committee has completed the standard definition, but adoption of the 802.11e standard is in
its early stages, and as with many standards there are many optional components. Just as occurred with
802.11 security in 802.11i, industry groups such as the Wi-Fi Alliance and industry leaders such as Cisco
are defining the key requirements in WLAN QoS through their WMM and Cisco Compatible Extensions
programs, ensuring the delivery of key features and interoperation through their certification programs.
speed up the rate of QoS adoption and to support multi-vendor time-sensitive applications, a unified
approach to wireless QoS is necessary. The IEEE 802.11e working group within the IEEE 802.11
standards committee has completed the standard definition, but adoption of the 802.11e standard is in
its early stages, and as with many standards there are many optional components. Just as occurred with
802.11 security in 802.11i, industry groups such as the Wi-Fi Alliance and industry leaders such as Cisco
are defining the key requirements in WLAN QoS through their WMM and Cisco Compatible Extensions
programs, ensuring the delivery of key features and interoperation through their certification programs.
Cisco Unified Wireless products support Wi-Fi MultiMedia (WMM), a QoS system based on
IEEE 802.11e that has been published by the Wi-Fi Alliance, and WMM Power Save, as well as
Admission Control.
IEEE 802.11e that has been published by the Wi-Fi Alliance, and WMM Power Save, as well as
Admission Control.
shows a sample deployment of wireless QoS based on Cisco Unified Wireless technology
features.
Figure 5-1
QoS Deployment Example
QoS Parameters
QoS is defined as the measure of performance for a transmission system that reflects its transmission
quality and service availability. Service availability is a crucial element of QoS. Before QoS can be
successfully implemented, the network infrastructure must be highly available. The network
transmission quality is determined by latency, jitter, and loss, as shown in
quality and service availability. Service availability is a crucial element of QoS. Before QoS can be
successfully implemented, the network infrastructure must be highly available. The network
transmission quality is determined by latency, jitter, and loss, as shown in
.
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WMM downstream QoS
WMM upstream and downstream QoS
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