Mai Kididdigar Haruffan SMS - Lissafin GSM-7 & UCS-2

Saƙo Mai Girman Byte 140: Fahimtar Tsarin GSM 03.38 (GSM-7) da UCS-2

Kowane daidaitaccen tsarin Short Message Service (SMS) da ake watsawa ta hanyoyin sadarwa na salula an iyakance shi sosai zuwa bits 1,120 (octets/bytes 140). A ƙarƙashin ƙayyadaddun bayanai na 3GPP TS 23.038, lokacin da saƙo ke amfani da haruffa kawai daga tsoffin haruffa 128 na GSM-7 da haruffan da aka faɗaɗa, kowane harafi yana cunkushewa ta amfani da bits 7 (septet). Raba bits 1,120 da bits 7 a kowane septet yana samar da shahararren iyakar SMS na haruffa 160 ($1120 / 7 = 160$).

Duk da haka, a daidai lokacin da saƙo ya ƙunshi harafi wanda ke waje da tsarin haruffan GSM-7—kamar Cyrillic, Larabci, Hindi, ko glyph na Sinanci, emoji, ko alamar zance mai lankwasa (`U+2019`)—ƙofar SMS dole ne ta sake lissafta dukkan payload ɗin ta amfani da UCS-2 (bits 16 / bytes 2 a kowane rukunin lambobi). Raba bits 1,120 da bits 16 nan take yana rage ƙarfin saƙo ɗaya zuwa haruffa 70.

Manyan Bayanan Mai Amfani (UDH) da Lissafin Ɓoye na Haɗa Sassa da Yawa na SMS

Lokacin da saƙo ya wuce septets 160 na GSM-7 ko rukunin lambobi 70 na UCS-2, ba za a iya a 𝻬ura shi azaman tsarin PDU ɗaya ba. Maimakon haka, kamfanin sadarwa yana raba rubutun zuwa sassa da yawa kuma yana ɗora Babban Bayanin Mai Amfani mai girman bytes 6 (bits 48) (UDH) a kowane sashe wanda ke ƙunshe da ID na tunani, adadin sassa gabaɗaya, da lambar jerin gwano.

A yanayin GSM-7, bits 48 na UDH da bit 1 na cika guda ɗaya suna cinye bits 49—daidai da septets 7—wanda ke rage ƙarfin rubutun amfani na kowane sashe daga 160 zuwa septets 153. A yanayin UCS-2, waɗannan bits 48 suna cinye cikakkun rukunin lambobi 16 guda 3, wanda ke rage ƙarfin kowane sashe daga haruffa 70 zuwa 67. Saboda dandamalin CPaaS suna cajin kowane sashe da aka watsa maimakon kowane saƙo mai ma'ana, abin da ya faru na Unicode ba zato ba tsammani zai iya ninka kasafin kuɗin SMS na kamfanoni da kashi 200% zuwa 300% cikin dare guda.

Kawar da Saukar da Matsayi na Unicode da Ba a Yi Niyya Ba Kafin Ƙaddamar da Yaƙin Neman Zaɓe

Ƙungiyoyin tallatawa suna yawan tsara yaƙin neman zaɓen SMS a Notion, Google Docs, ko Microsoft Word, waɗanda ke maye gurbin apostrophes marasa lahani (`'`) da alamomin zance na dama (`’`) da hyphen biyu tare da em-dashes (`—`). Mai duba septet mai aiki na Multinook yana nuna kowane harafi wanda ba na GSM ba a cikin ja mai haske kuma yana ba da fassarar 1-click nan take a cikin RAM na burusa (browser) na gida.