access category
接入类别
WME (Wireless Multimedia Extensions) defines the subset of prioritized QoS for IEEE 802.11. [...] Referring to FIG. 2, an illustrative functional block diagram of a WME-based interface, such as a network interface card (NIC) 200, is shown. The NIC 200 includes a transmit path 201 [...] The transmit path includes a priority resolver 204 and a transmit engine 205. The priority resolver 204 assigns an access category (AC) to each MSDU packet and forwards the MSDU packets to the transmit engine 205. The IEEE 802.11 standard defines four ACs: Background, Best Effort, Video, and Voice. Depending upon the AC assigned to a particular MDSU packet, the transmit engine 205 applies one or more enhanced distributed channel access function (EDCA) access parameters to the packet, such as the defined transmit opportunity limit duration (txoplimit), arbitration inter frame space (AIFS) interval, and/or the contention window (CW) interval (designated by CWmin and CWmax).
为了增强WLAN服务质量QoS (Quality of Service) 保障能力，IEEE802.11e标准在DCF的基础上引入了 EDCA (Enhanced Distribution Channel Access, 分布式协调扩展) 机制。IEEE802.11ac沿用了EDCA机制。在EDCA下，需要传输的MAC SDU (MSDU, MAC Service Data Unit, MAC服务数据单元) 被分成4个队列，每个队列对应一个接入类别AC (Access Category)。在每个非空闲队列上按照该接入类别AC的接入参数运行一个EDCA机制接入功能实例来进行传输机会TXOP (Transmission Opportunity) 竟争。"
access category
来自翻译宝典
- 英语>简体中文, 专利术语
access category
访问类别，存取范畴
访问类别，存取范畴
- 英语>简体中文, 英汉计算机词汇
access category
访问范畴
访问范畴
- 英语>简体中文, 简明英汉词典
access category
存取種類
存取種類
- 英语>繁体中文(台湾), 电子计算机名词
