gsm原理介紹(英文版)-資料下載頁(yè)
2025-02-27 00:48本頁(yè)面
【正文】 t Stongest BCCH YES NO YES NO NO Location = Previous Location? YES YES MS camped on listens for page, can request service Using SACCH adjust power, TA report RX Qual etc MS goes to the assigned SDCCH ( Freq., timeslot, ... ) for authentication + location Update MS sends RACH BS assigns SDCCH to MS using the CCCH NOKIA Orignated Call BS pages MS using the CCCH MS sends RACH BS ORIGINATED CALL MS ORIGINATED CALL MS responds with RACH BS assigns MS to SDCCH or TCH MS transmits and receives speech on TCH TCH Using the FACCH on TCH authentication location update Using the SDCCH, authentication, call setup, and TCH assignment Using the SACCH, BS mands MS to adust power + timing, MS reports power + Rx quality of BCCH + adjacent BCCH MS transmits + receives speech on TCH Using the SACCH on TCH, MS reports power + Rx quality , BS mands MS to adjust power ,TA During inactive timeslots, MS measures adjacent cells, BCCH Call disconnected by MS or BS NOKIA Subscriber Identity Module ( SIM ) SIM contains ( at least ) following information : ? IMSI (International Mobile Subscriber Identification) ? MCC MNC (Mobile Country Code and mobile Network Code) ? Any other user specific information NOKIA International Mobile Subscriber Identity ( IMSI ) IMSI = MCC + MNC + MSIN NMSI 3 digits 2 digits Not more than 15 digits IMSI = International Mobile Subscriber Identity MCC = Mobile Country Code MNC = Mobile Network Code MSIN = Mobile Station Identification Number NMSI = National Mobile Subscriber Identity NOKIA International Mobile Equipment Identity ( IMEI ) IMEI = International Mobile Equipment Identity TAC = Type Approval Code FAC = Final Assembly Code SNR = Serial Number SP = Spare IMEI = TAC + FAC + SNR SP + 6 digits 2 digits 6 digits 1digit NOKIA 演講完畢，謝謝觀看！
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