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Saturday, September 26, 2009

Mark版稻香

Wednesday, September 16, 2009

Google 甜甜圈Android Donut SDK

新聞連結:

Google釋出Android Donut SDK

請點這裡download

Android 1.6 Version Notes

Android 1.6 Platform Highlights

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有一些修改:)

Quick Search Box for Android

Camera, Camcorder, and Gallery

VPN, 802.1x

Battery usage indicator

Accessibility

宣傳影片



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其他文章:

Androud Donut update information

Note 2.0: Android 到底有沒有TTS

Sunday, September 6, 2009

什麼是 EVDO ?

EVDO (Evolution-Data Optimized or Evolution-Data)


網路上查詢 EVDO在 英文的定義結果:


EV-DO - Evolution-Data Optimized or Evolution-Data only, abbreviated as EV-DO or EVDO and often EV, is a telecommunications standard for the wireless ...


en.wikipedia.org/wiki/EV-DO


ev do - A wireless radio broadband data standard adopted by many CDMA mobile-phone service providers in Japan, Korea, Brazil, Israel, the United States, Australia, Canada, New Zealand, Venezuela and Mexico. ...


www.goingwimax.com/wimax-glossary/


Part of the CDMA2000 family of standards, it is wireless radio broadband protocol that delivers download data rates of up to 2.4 Mbps. ...


about.telus.com/investors/annualreport2005/en/glossaryBot.html


Evolution data maximized (CMDA2000 1x EVDO) is based on CDMA2000. EVDO supports mobile data communications at speeds ranging from 400 Kbps to 2 Mbps.


resources.bandwidthmarket.com/corporate/whatis.techtarget.com/definition/0,,sid9_gci1193741,00.html


ev do - evolution-data only. This is the fastest cellphone data technology available in the US and is available only on CDMA networks. ...


www.chrsolutions.com/TelecomGlossary.html




3G is designed to provide voice and high-speed mobile data using the cellular approach already proven to work in mobile phone networks. The biggest obstacle to implementing high speed wireless networks is the lack of bandwidth, or range of usable frequencies. Just as only so many radio stations can be squeezed onto the FM dial, only so much data can be transmitted across the available bandwidth. EVDO is an advanced CDMA technology developed by Qualcomm to deal with this limitation.








From Something about Movie

什麼是 CDMA ?

網路上查詢 CDMA的定義結果:

CDMA,英文全寫為Code Division Multiple Access,翻譯作码分多址或分码多工或分码复存,是一種多路複用的無線通訊技術。

zh.wikipedia.org/wiki/CDMA

CDMA經常被廣泛和不嚴格地用來稱呼使用CDMA技術實現的無線網路及其制式,比較常見的是由Qualcomm主要支持和最先投入商用的數位細胞電話制式,包括IS-95(CDG為其申請註冊商標為cdmaOne)和它的演進版本IS-2000(CDMA2000),其他很少這樣使用。由於WCDMA和TD-SCDMA也使用了CDMA技術,這樣的稱呼可能會造出一些混亂。

這裏需要注意:

CDMA(分碼複存/復用技術)理論被應用於WCDMA無線介面。
WCDMA無線介面被應用於國際3G標準UMTS和日本3G標準——FOMA(由日本電信和沃達豐共同開發)。
CDG、TIA和3GPP2等制訂的俗稱為CDMA的系列標準族(包括cdmaOne和CDMA2000)和3GPP的WCDMA標準族無論無線訊號和核心網都不兼容。

碼多分址技術。是近年來在數字通信過程中出現的一種先進的無線擴頻通信技術,它能夠滿足市場對移動通信 ...
soft.shouji56.com/article/256.html

碼分多址,是移動通信的一種國際技術標準,屬於第二代(2G)的移動通信技術,起源於美國,盛行於韓國和 ...
blog.ednchina.com/kingargos/74699/message.aspx

相關文章:

什麼是GSM ?

什麼是 GPRS ?

什麼是 MTP ? Media Transfer Protocol

網路上查詢 MTP的定義結果:

出現 :

信息傳遞部分(MTP),在SS7/C7協議組中的協議,傳輸信號信息和執行相關的功能,例如錯誤控制和信令鏈接安全。 ...
www.networkdictionary.cn/protocols/m.php

感覺很拗口,因為是機器翻譯的?@@

實際上要講的是 What is MTP (Media Transfer Protocol) ?

wiki : Media Transfer Protocol

The Media Transfer Protocol is a devised set of custom extensions to the Picture Transfer Protocol (PTP).

Media Transfer Protocol supports the transfer of music files on digital audio players and movie files on portable media players.

from Definition of "Media Transfer Protocol"

The Media Transfer Protocol is a system devised by Microsoft that allows for the synchronization of media files between a personal computer and a device such as a cell phone or MP3 player.

所以看來是跟微軟有關的

那去google group上發問

看到這個

Is there any plan to support MTP protocol in Donut or later?

所以G1上應該是有3rd party來做MTP, Google android project open source的部份不支援MTP !

From Something about Movie


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update 2011

Android 3.0 開始在Nvdia的平台上開始有支援MTP嚕

不過MTP跟adb之前還有一些問題,

所以不建議同時開始MTP以及adb


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