Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guia Do Desenho
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Enterprise Mobility 4.1 Design Guide
OL-14435-01
Chapter 5 Cisco Unified Wireless QoS
Wi-Fi Multimedia
The ADDTS contains the TSpec element that describes the traffic request. See
and
for examples of an ADDTS request and response between a Cisco 7921 WLAN handset and
a Cisco AP. Apart from key data describing the traffic requirements, such as data rates and frame sizes,
the TSpec element also tells the AP the minimum physical rate that the client device will use. This allows
the calculation of how much time that station can potentially consume in sending and receiving in this
TSpec, and therefore allowing the AP to calculate whether it has the resources to meet the TSpec. TSpec
admission control is used by the WLAN client (target clients are VoIP handsets) when a call is initiated
and during a roam request. During a roam, the TSpec request is appended to the re-association request.
the TSpec element also tells the AP the minimum physical rate that the client device will use. This allows
the calculation of how much time that station can potentially consume in sending and receiving in this
TSpec, and therefore allowing the AP to calculate whether it has the resources to meet the TSpec. TSpec
admission control is used by the WLAN client (target clients are VoIP handsets) when a call is initiated
and during a roam request. During a roam, the TSpec request is appended to the re-association request.
Figure 5-13
ADDTS Request Decode