?????????????

????2??FRR??????????й???

????FRR???????????????????????????й????

????a??????????棺

????b????????????????????????з?????

????c??????????????????????????????????????

?????ò???????????????仯??????

????OPEN -> CLOSE;

????OPEN -> RFA;

????OPEN -> TRA?? TRA -> RFC??

????3????????????

????????????????????????棬?????????м?????????????????????????????????????Follow-up?????С?

?????ò???????????????仯??????

????RFA -> ANA??

????4??NCB????

????NCB????????????Ρ??μ???????????????????????FRM???

?????????????????

?????? ??????????????????

?????? ?????????????????ж???

?????? ????WAIT??WAITCRB????NCR??NVL???????棬????μ??????????

??????????????飬??????????仯????????????????

????OPEN -> TRA??TRA -> RFC??

????ANA -> RFC??

????WAIT??NCR -> RFA??

????WAIT??RFC??NCR??NVL -> RFC??

????ANA??NCR??WAIT -> CLOSE??

????5??????????

???????????????????????????????????????????????????????????????????????????????????????????Follow-up?????????????????????????????????????????????????????????

?????ò???????????????仯??????

????RFC -> COR??

????RFC -> NCR??