【正文】 幀間間隔 InterFrameSpacing DIFS AIFS PIFS SIFS RTS CTStoself DATA SIFS CTS DATA ACK SIFS SIFS SIFS SIFS Data ACK SIFS ACK EIFS AIFS DIFS AIFS PIFS SIFS 1: Data + ACK 2: CTStoself + Data + ACK 3: RTS + CTS + Data + ACK 幀交換示例 Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 Station 1 Station 2 AP 1 Station 1 IFS timer AP IFS timer Station 2 IFS timer 幀間間隔（ Inter Frame Spacing） DIFS SIFS PIFS IFS DIFS SIFS IFS DIFS SIFS PIFS IFS Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 Station 1 Station 2 AP 1 Station 1 backoff timer AP backoff timer 0 NAV Station 2 Backoff timer 隨機后退算法（ Random Backoff Algorithm） BT BT BT Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 分布式協(xié)調(diào)功能 (DCF) Station 1 Station 2 AP 1 BT 0 NAV + 1 + 2 + 3 3 2 1 CCA DIFS SIFS PIFS BT 0 NAV + 1 + 2 + 3 3 2 1 CCA DIFS SIFS PIFS IFS IFS Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 無線訪問接入點 協(xié)調(diào)功能 (PCF) Point Coordination Function MAC 架構(gòu) 分布式協(xié)調(diào)功能 Distributed Coordination FunctionDCF 增強型分布式信道 存取 (EDCA) HCF Contention Access HCF控制信道接入 HFC Controlled Access (HCCA) MAC Extent 量化 QOS服務(wù) 優(yōu)先級 QOS服務(wù) 沒有 QOS服務(wù) 需求的工作站 Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 HCF控制信道接入 (HCF Controlled Channel Access : HCCA) Qos (+) CF Poll Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 增強型分布式信道存取 （ EDCA） QOS DATA SIFS ACK Voice = SIFS + 2 Slots + 03 Slots Video = SIFS + 2 Slots + 07 Slots Best Effort = SIFS + 3 Slots + 015 Slots Background = SIFS + 7 Slots + 015 Slots Access Category (AC) Timings SIFS AIFS QAP Voice Video Best Effect Background Voice Video Best Effect amp。 Background QOS主要在下行數(shù)據(jù)方向 Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 WMM接入分類（ AC） 接入分類 描述 D 流量類型 語音（ Voice）優(yōu)先級 高優(yōu)先級 支持低延遲和高質(zhì)量要求的VOIP 7， 6 視頻（ Video）優(yōu)先級 一個 a通道能支持3～ 4路 SDTV或 1路 HDTV 5， 4 盡力而為（ Best Effort）優(yōu)先級 對延遲不敏感，但高延遲會對應(yīng)用產(chǎn)生影響的應(yīng)用，如Web等 0， 3 背景（ Background）優(yōu)先級 低優(yōu)先級（文件下載等）沒有嚴(yán)格延遲和帶寬需求的流量 2， 1 Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 WiFi 多媒體 Voice Video Best Effort Background 到天線 網(wǎng)絡(luò)數(shù)據(jù)流優(yōu)先級 Motorola Document Classification, Beyond the Four Walls MOTOROLA and the Stylized M Logo are registered in the US Patent amp。 Trademark Office. All other product or service names are the property of their respective owners. 169。 Motorola, Inc. 2022 AP上啟用 WMM