建置救災簡訊系統 NCC：需再和業者商討 ??

建置救災簡訊系統　NCC：需再和業者商討 ??

http://mol.mcu.edu.tw/show_2009.php?nid=136993

　日本震災訊息傳遞快速，台灣為效法因應緊急災害通知簡訊，國家通訊傳播委員會（NCC）18日邀電信業者商量，NCC發言人陳正倉表示，礙於台灣手機格式不是統一設備，目前實行機率不高。

　NCC說明，必須以一種「細胞廣播」通訊技術，發送給各手機門號，便能最快將訊息傳給民眾，至於軟體建置還需討論。

另外一則報導

http://www.nownews.com/2011/03/21/91-2698453.htm

蘇蘅今日說，中華電信已經有LBS（小區域簡訊發送系統），至於俗稱細胞廣播的CBS（數位訊息廣播），中華電信表示還需要1年時間研發，其他業者還在了解中，如需強制業者建置必須修法

中華電信進一步說明，「細胞廣播」的通訊技術不僅只是電信業者方面增置，行動終端業者硬體方面也要配合，據了解目前3G手機部份廠商如諾基亞、iPhone等就未建置此硬體功能，因此「細胞廣播」要建置完成，需要多方協商議談。

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以上

1. NCC發言人陳正倉表示，礙於台灣手機格式不是統一設備，目前實行機率不高

"簡訊" 是GSM 標準，每一家手機都一樣。

2. 簡訊細胞廣播SMS-CB( SHORT MESSAGE CELL BOARDCASTING )是 GSM/UTMS 標準，不管2G.3G的手機都支援。NOKIA 部分與IPHONE 其實是少數例外

http://en.wikipedia.org/wiki/Cell_Broadcast

http://zh.wikipedia.org/wiki/%E5%B0%8F%E5%8C%BA%E5%B9%BF%E6%92%AD

至於傳輸格式的部分，其實早有規範

A Cell Broadcast message page comprises 82 octets, which, using the default character set, equates to 93 characters. Up to 15 of these pages may be concatenated to form a Cell Broadcast message. Each page of such a CB message will have the same message identifier (indicating the source of the message), and the same serial number. Using this information, the mobile telephone is able to identify and ignore broadcasts of already received messages.

Cell Broadcast Centre (CBC) - a node which is a source of SMS-CB - is connected to Base Station Controller (BSC) in GSM networks or to Radio Network Controller (RNC) in UMTSnetworks via standardized interface over TCP/IP. The BSC-CBC interface is described in 3GPP standard TS 48.049. The RNC-CBC interface is described in 3GPP standard TS 25.419. CBC sends to the BSC/RNC SMS-CB messages with a list of cells where the message shall be broadcast and the requested repetition rate and number of times they shall be broadcast. BSC and RNC responsibility is to deliver the SMS-CB messages to the Base Station (BTSs) and NodeBs which handle the requested cells.

In GSM SMS-CB messages are broadcast over air interface on special signaling channel - Cell Broadcast Channel (CBCH). CBCH reuses one of signalling channels (SDCCH). There is only one CBCH in each cell in cellular network. GSM specification allows to send only one SMS-CB message page every 1.883s in basic mode and another one in extended mode. However extended mode is optional in GSM thus neither network nor mobile phones are required to support it, thus the real throughput is only one message page each 1.883s in basic mode.

Broadcast messages will be used in the United States to send emergency alerts, using the CMAS C-interface protocol, which has been specified jointly by ATIS and TIA. All four major providers have agreed to take part.

目前已經建置的範例包括(中國)

1. ^ 深圳市分區預警方案
2. ^ 氣象科技服務中心加緊建設小區廣播
3. ^ 科皓公司簽約內蒙古自治區氣象局小區廣播預警信息發布系統項目
4. ^ iMobile小區廣播系統
5. ^ CBC – Cell Broadcast Center