WMM详解.pdf

Wi-Fi Alliance Technical Committee Quality of Service (QoS) Task Group WMMTM (including WMMTM Power Save) Specification Wi-Fi Alliance Version 1.1 WMM_Specification_1-1.doc Page 1 of 36 Contents Contents 2 1 Overview 4 1.1 Purpose of This Document 4 1.2 Terms and Definitions 4 1.3 WMM Features 5 2 WMM Frame Formats 6 2.1 Data Frame Formats 6 2.1.1 Fields 6 2.1.2 Frame Control Field 6 2.1.3 Duration Field 7 2.1.4 Addresses 7 2.1.5 Sequence Control Field 7 2.1.6 QoS Control Field 7 2.2 Management Frame Formats 8 2.2.1 WMM Information Element 8 2.2.2 WMM Parameter Element 10 2.2.3 Beacon Frame 12 2.2.4 Probe Request Frame 12 2.2.5 Probe Response Frame 12 2.2.6 Association Request Frame 12 2.2.7 Association Response Frame 12 2.2.8 Re-Association Request Frame 12 2.2.9 Re-Association Response Frame 12 2.2.10 Management Action Frame 12 2.2.11 WMM TSPEC Element 14 3 WMM Protocol Specification 17 3.1 Association and Capability Negotiation 17 3.1.1 Procedure at an AP 17 3.1.2 Procedure at a STA in an Infrastructure Network 17 3.1.3 Procedure at a STA in an IBSS 17 3.2 Setting of WMM Parameters 18 3.2.1 Default WMM parameters 18 3.2.2 WMM Parameters in an Infrastructure Network 18 3.2.3 WMM Parameters in an IBSS 18 3.3 Ass