無線

無線射頻辨識系統原理與應用報告

組員 : 李兆峻 曾鑫梓 葉偉仁

主題 :Wireless

指導老師 : 宋志揚

Agenda

• 2010無線網路發展趨勢• 802.11n and MIMO

• Wireless Security

2010無線網路發展趨勢

IS-95Acdma

IS-136TDMAGSM PDC 802.11b

802.11a

IS-95Bcdma

HSCSD GPRS iMode

IS-95Ccdma2000

TD-SCDMALCR-TDD

E-GPRSEDGE

W-CDMAFDD

W-CDMATDD

1xEV-DORelease 0

1xEV-DORelease A

HSDPAFDD & TDD

1xEV-DORelease B

HSUPAFDD & TDD

802.16eMobile

WiMAX

LTERel-8

EDGEEvolution

HSPA+

LTEAdvanced

Rel-10

802.16mWiMAX 2

802.11ac802.11ad

802.11n

802.11g

802.11h

2G

2.5G

3G

3.5G

3.9G

4G

Wireless evolution 1990 - 2010

What exactly is Wi-Fi CERTIFIED Wi-Fi Direct? Wi-Fi CERTIFIED Wi-Fi Direct is an upcoming program from the Wi-Fi Alliance that defines a new way for Wi-Fi devices to work together. Wi-Fi devices will be able to make direct

Wi-Fi Direct

WiMAX 2

802.16m will be significantly faster than its predecessor. WiMAX forum vice president Mohammad Shakouri says the goal is for the new WiMAX standard to deliver average downlink speeds of more than 100Mbps to users. In contrast, Sprint's initialXohm WiMAX offering, which debuted commercially in 2008, delivered downlink speeds ranging between 3.7M to 5Mbps.

Item Wimax Wimax 2通信協定 802.16e 802.16m速率 3.7M to 5Mbps 100Mbps up

短距離傳速度 70M 300M

基地台涵蓋率 31 平方英里 31 平方英里

DSRC

802.11n and MIMO

多通道 雙層道 共乘系統

Wireless Security無線網路加密真的很容易破解嗎？

由於WEP本身存有漏洞，很容易透過收集封包，以反向運算的方式破解

原本一直被認為是安全的WPA 、 WPA2，也在 2006年宣告破解，現在可以透過字典檔攻擊的方式，從而找出無線網路的加密金鑰