Friday, June 13, 2008

[Korea 2008] 韓國巨大喜慶花籃



撮影日付:1st June 2008
撮影場所:Seoul, Korea. (韓国ソウル)
機材:EOS Kiss digital + EF 24-70mm

韓國的喜慶花籃的size還蠻驚人的,
不但比我還高出許多,而且總是一字排開~
在韓國,其實不太容易看到漢字,喜慶花籃的祝詞就是少數例外。

[Cat Note]
Transport Layer Protocol: 1) provides logical communication between applications on different host
2) implemented in the end systems but not in nw routers
3) TL Tx converts things to be sent into TL packets, known as TL segments. (TL header + chunk of things-to-be-sent)

[ACTIVATE PDP CONTEXT REQUEST]—[Quality of service]
maximum bit rate for uplink/downlink
In MS to network direction:
0 0 0 0 0 0 0 0 Subscribed maximum bit rate for uplink

Periodic Location Update:
1) to notify periodically the availability of MS to NW
2) controled by T3212 in MS (how to find the timer value? see 24.008/4.4.2)
3) will be delayed if met NO CELL AVAILABLE, LIMITED SERVICE, PLMN SEARCH

筆記一下Iu Mode(3G/WCDMA)的T3212要怎算,詳情請洽24.008和25.331
先找到System Information Block 1
最開頭是CN common GSM-MAP NAS system information
第一項CN domain system information list
的第一條cn-DomainIdentity cs-domain
的第一欄cn-Type gsm-MAP
會有4個16進位的digits像是'0A01'H
第一個Byte就是T3212啦,
不過,它是用十分之一小時(6分鐘)來表示的,
所以像這個例子,先把A換算成10進位等於10,然後乘6分鐘,
這個網路的T3212就是60分鐘啦。

再來是2G(GSM)的,2G是用System information type 3廣播,
找Control Channel Description的IE,
其中第4個octet定義成T3212 time-out value,
它的單位是decihours(6分鐘),所以找到這個值,換算成10進位後乘6就好了。
2G部分詳情請洽: 3GPP TS 04.18