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• °²×¿ÊÖ»ú»ñÈ¡GSM³¡Ç¿ºÍÐźÅÇ¿¶ÈµÃµ½ber=99£¬Ôõô¼ÆËãÐźÅÇ¿¶È°¡£¿ 2019-12-26
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1) ÓÉÓÚBCCH²ÉÓÃ4¡Á3¸´Óã¬Ôò4¸ö»ùÕ¾12¸öСÇøËùÓõÄBCCHƵµãÊýΪ£º12¸ö£¬Ê£ÓàµÄ50£12£½38¸öƵµã£¬Ò»¸öΪ¸ôÀëƵµã£¬37¸öÊÇTCHƵµã¡£
Because 4 X 3 reuse mode is used for BCCH, then 12 cells in four base stations use 12 BCCH frequencies, and there are 50 ¨C 12 = 38 frequencies left, among which one is the isolation frequency, and 37 are TCH frequencies.
TCHÒ²²ÉÓÃ4¡Á3¸´Óã¬Ôò£º37/4=9£¬×ܹ²Ê£Ò»¸öƵµã¡£ËùÒÔÒ»¸ö»ùÕ¾µÄTCH¿ÉÒÔÅäÖÃΪ3£¬3£¬3;
4 X 3 reuse mode is also used for TCH, and 37/4 = 9, with one frequency left. So TCHs of one base station can be configured as 3, 3, 3.
ËùÒÔ»ùÕ¾µÄ×î´óÕ¾ÐÍΪ£ºS444£¨Èç¹û»Ø´ð³É£ºS544Ò²¿ÉÒÔ£¬ÒòΪʣÓàµÄÒ»¸öƵµã¿ÉÒÔÅäÖõ½Ëĸö»ùÕ¾ÖеÄÈκÎÒ»¸ö£¬ÅäÖþͳÉΪÁË£ºS544£©
Therefore, the maximum site of base station is S444 (S544 is also right, because the remaining one frequency can be configured to any of the four base stations to form S544)
Because 4 X 3 reuse mode is used for BCCH, then 12 cells in four base stations use 12 BCCH frequencies, and there are 50 ¨C 12 = 38 frequencies left, among which one is the isolation frequency, and 37 are TCH frequencies.
TCHÒ²²ÉÓÃ4¡Á3¸´Óã¬Ôò£º37/4=9£¬×ܹ²Ê£Ò»¸öƵµã¡£ËùÒÔÒ»¸ö»ùÕ¾µÄTCH¿ÉÒÔÅäÖÃΪ3£¬3£¬3;
4 X 3 reuse mode is also used for TCH, and 37/4 = 9, with one frequency left. So TCHs of one base station can be configured as 3, 3, 3.
ËùÒÔ»ùÕ¾µÄ×î´óÕ¾ÐÍΪ£ºS444£¨Èç¹û»Ø´ð³É£ºS544Ò²¿ÉÒÔ£¬ÒòΪʣÓàµÄÒ»¸öƵµã¿ÉÒÔÅäÖõ½Ëĸö»ùÕ¾ÖеÄÈκÎÒ»¸ö£¬ÅäÖþͳÉΪÁË£ºS544£©
Therefore, the maximum site of base station is S444 (S544 is also right, because the remaining one frequency can be configured to any of the four base stations to form S544)
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