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IEEE802.11的WLAN英文ppt

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介绍了下面的内容The wireless revolution IEEE 802.11 vs. 802.3 Architecture (introduction) WLAN 802.11 requirements Wireless Network Overview IEEE 802.11 services MAC Layer Reliability of data delivery service Control of shared WL network Frame Types Management Frame Types Privacy service Open Issues The IEEE task groups for 802.11 802.11 documentation
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IEEE 802.11 overview 1
IEEE 802.11 WLAN
By
Orly Meir & Ilan Bar

IEEE 802.11 overview
Agenda
The wireless revolution
IEEE 802.11 vs. 802.3
Architecture (introduction)
–
WLAN 802.11 requirements
–
Wireless Network Overview
–
IEEE 802.11 services
MAC Layer
–
Reliability of data delivery service
–
Control of shared WL network
–
Frame Types
–
Management Frame Types
–
Privacy service
Open Issues
The IEEE task groups for 802.11
802.11 documentation

IEEE 802.11 overview
The wireless revolution
NO WIRES
Goals
–
One Wireless standard for at Home, in the Office, and on the Move.
–
Interoperability with wired networks
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Security, QOS, Roaming users.
Usage:
–
Entertainment (films, shows, gaming, music,..)
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Information (Internet, ..)
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E-commerce (secure home shopping,..)
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Social contacts (email, voice, interest groups,..)
–
PC (documents, data, printing, scanner, server, ...)
–
Control (A/V devices, security, ..)

IEEE 802.11 overview
IEEE 802.11 vs. 802.3
Similarity
–
Same LLC (Logical Link Control). There in no differences for upper layer protocol
Differences
–
WLAN is not private (not protected)
–
WLAN is exposed to more distractions (environment problems)
•
Reflectors
•
Changes in strength on the Rx signal in small position change
•
Moving object can change the wave signal
•
Other infrared devices overlap the Tx path.
•
Etc…
–
Mobility
•
The WLAN user can move from one place to another – big advantage. But it cause internal complexity.
Roaming between access points and between different IP networks (Mobile IP or DHCP).
•
Servers and services need to be changed (Printer, Proxy server, file server, etc…)
–
IEEE 802.11 PHY has NO collision detection
•
IEEE 802.3 use collision detection algorithm.
•
IEEE 802.11 use collision avoidance algorithm.
Translation of 802.11 802.3 is not on the scope of the IEEE 802.11 spec’

IEEE 802.11 overview
Architecture
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资源评论

- 菜鸟一枚哈哈哈2012-10-06这个就是一篇文章,不是具体的讲述IEEE协议的,内容很简单
- shadyzf2012-02-21ppt文档 讲述了Wlan的原理等,很适合学习使用

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