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802.11b协定 [复制链接]

Hugo801122 (离线)
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揭晓于 2014-4-24 00:57:09 |只看该作者 |倒序浏览
要害词: wifi
价钱克己的便携式盘算机、移动德律风和手持式嵌入式系统装备的日趋盛行,和Internet应用法式模范模范和电子商务的快速生长,应用户须要随时阻拦群集毗连。为知足这些需求,可以应用两种措施将便携式装备毗连到群集,而没有电缆所带来的未便。这两种尺度就是802.11b和Bluetooth。802.11b是一种11Mb/s 无线尺度,可为条记本电脑或桌面电脑用户供应完全的群集服务。
以往,无线局域网生长迟缓,推行应用艰辛,主若是由于传输速率低、资源高、产物系列无限,且许多产物不克不及相互兼容。如之前无线局域网的速率只需1~2Mb/s,而许多应用也是凭证10Mb/s以太网速率设计的,限制了无线产物的应用种类。针对现在高速增添的数据营业和多媒体营业,无线局域网取得停留的要害就在于高速新尺度的制订,和基于该尺度的10Mb/s以致更高速率产物的泛起。IEEE 802.11b从基本上改变了无线局域网的设计和应用现状,知足了人们在一定区域内完成不一连移动办公的需求,为我们创作缔造了一个自在的空间。



Contents
3.8 Basic service set (BSS) basic rate set..........................................................................................1
4. Abbreviations and acronyms................................................................................................................2
7.2.3.1 Beacon frame format................................................................................................................2
7.2.3.9 Probe Response frame format..................................................................................................3
7.3.1.4 Capability Information field....................................................................................................3
7.3.1.9 Status Code field......................................................................................................................5
7.3.2.2 Supported Rates element..........................................................................................................5
9.2 DCF..............................................................................................................................................5
9.6 Multirate support..........................................................................................................................6
10.3.2.2 MLME_scan.confirm.............................................................................................................6
10.3.2.2.2 Semantics of the service primitive......................................................................................7
10.3.3.1.2 Semantics of the service primitive......................................................................................8
10.3.10 Start.........................................................................................................................................8
10.3.10.1.2 Semantics of the service primitive....................................................................................9
10.4.4 PLME_DSSSTESTMODE.....................................................................................................10
18. High Rate, direct sequence spread spectrum PHY specification.......................................................11
18.1Overview....................................................................................................................................11
18.2High Rate PLCP sublayer..........................................................................................................12
18.3High Rate PLME........................................................................................................................27
18.4High Rate PMD sublayer...........................................................................................................30
Annex A (normative), Protocol implementation conformance statement (PICS) proforma.........................59
Annex C (normative), Formal description of MAC operation......................................................................64
Annex D (normative), ASN.1 encoding of the MAC and PHY MIB............................................................88
Annex F (informative), High Rate PHY/frequency-hopping interoperability...............................................89
下载: 802.11b.rar (685.68 KB, 下载次数: 3)




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