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1 ÐŵÀÇëÇó Channel Request £¨Rach £©MS ¨¤BTS
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2 ÉêÇëÐŵÀ Channel Required( BTS ¨¤BSC)
BTSÏòBSC·¢Ò»ÌõÉêÇëÐŵÀÏûÏ¢¡£Í¨¹ýÕâÌõÏûÏ¢£¬BTS½øÒ»²½ÏòBSC´«µÝÓÉÒƶ¯Ì¨·¢ÆðµÄÐŵÀÇëÇó¡£Êµ¼ÊÉÏ£¬ÉêÇëÐŵÀÏûÏ¢ÖгýÁË°üº¬ÐŵÀÇëÇóÏûÏ¢ÖеÄһЩÏûÏ¢Í⣬»¹°üÀ¨Í¨¹ýBTS¼ÓÈëµÄһЩÏûÏ¢¡£ÉêÇë²ÎÊýÖ±½Ó´ÓÐŵÀÇëÇóÏûÏ¢ÖÐÀ´£¬³õʼʱ¼äÌáÇ°Á¿ TA £¨½ÓÈëÑÓ³Ù£©ÓÉBTS ¼ÓÈëµ½ÕâÌõÏûÏ¢ÖÐÈ¥ ¡£
3 ÐŵÀ¼¤»î Channel Activation (BSC ¨¤BTS)
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4 ÐŵÀ¼¤»î֤ʵ Channel Activation ACK(BTS ¨¤BSC)
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5 Á¢¼´Ö¸ÅäÃüÁî immediate assignment (BSC ¨¤BTS)
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6 Á¢¼´Ö¸Åä immediate assignment (BTS ¨¤MS) AGCH
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7 CM ÒµÎñÇëÇó CM service request (MS ¨¤BTS ¨¤BSC ¨¤MSC)
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8 ÎÞ±àºÅÈ·ÈÏ UA(SDCCH)
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9 ¼øȨ Authentication Request MSC ¨¤BSC ¨¤BTS ¨¤MS
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10 TMSI ÔÙ·ÖÅäÃüÁî TMSI Reallocation
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11 ½¨Á¢ Setup
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12 ºô½Ð½ÓÐø Call Proceeding
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13 Ö¸ÅäÇëÇó Assigment Activation BSC ¨¤BTS
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