【正文】 i o n R e c o n f i g u r a t i o n C o m p l e t eP a th S w itc h R e q u e s tU p d a te B e a r e r R e q u e s tU p d a te B e a r e r R e s p o n s eP a th S w itc h R e q u e s t A c kLTE切換信令流程 55 eNodeB間 EPC內(nèi)（ S1） UE SeNodeB TeNodeB MME SGW m e a s u r e m e n t R e p o r tr r c C o n n e c t i o n R e c o n f i g u r a t i o nr r c C o n n e c t i o n R e c o n f i g u r a t i o n C o m p l e t eP a th S w itc h R e q u e s tU p d a te B e a r e r R e q u e s tU p d a te B e a r e r R e s p o n s eP a th S w itc h R e q u e s t A c ke N B S t a t u s T r a n f e rM M E S ta tu s T r a n f e rC r e a te B e a r e r R e q u e s tC r e a te B e a r e r R e s p o n s e源 MME與源SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 目標(biāo) MME與目標(biāo) SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 LTE切換信令流程 56 eNodeB間 EPC間 UE SeNodeB TeNodeB SMME SSGW m easurem entR eportTMME TSGW PGW H a n d o v e r R e q u i r e dForw ard R elocation R equestC r e a t e B e a r e r R e q u e s tC re a te B e a re r R e q u e stC re a te B e a re r R e sp o n seC r e a t e B e a r e r R e s p o n s eH a n d o v e r R e q u e s tH a n d o v e r R e q u e s t A c kC r e a t e B e a r e r R e q u e s tC r e a t e B e a r e r R e s p o n s eF orw ard R elocation R esponseC r e a t e B e a r e r R e q u e s tC r e a t e B e a r e r R e s p o n s eH a n d o v e r C o m m a n d目標(biāo) MME與目標(biāo) SGW建立上行承載 切換準(zhǔn)備過程 LTE切換信令流程 57 eNodeB間 EPC間 rrc C o n n e c tio n R e c o n fig u ra tio ne N B S t a t u s T r a n f e rPD C P STA TU S TR A N SFERM M E S t a t u s T r a n f e rr r c C o n n e c t i o n R e c o n f i g u r a t i o n C o m p l e t eH a n d o v e r N o t i f yForw ard R elocation C om pleteF o rw a rd R e lo c a tio n C o m p le te A c kU p d a t e B e a r e r R e q u e s tU p d a te B e a re r R e q u e stU pdate B earer R esponseU p d a t e B e a r e r R e s p o n s eU L I n f o r m a t i o n T r a n s f e rU p l i n k N A S T r a n s p o r tU E C O N T E X T R E L E A S E C O M M A N DD e l e t e B e a r e r R e q u e s tU E C O N T E X T R E L E A S E C O M P L E T ED e l e t e B e a r e r R e s p o n s e連接態(tài) TAU流程 UE SeNodeB TeNodeB SMME SSGW TMME TSGW PGW 切換執(zhí)行過程 源 MME與源SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 目標(biāo) SGSN與目標(biāo) SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 LTE切換信令流程 58 LTE到 TDSCDMA切換 UE eNodeB NodeB MME SSGW SGSN TSGW PGW RNC measurementReportH a n d o v e r R e q u i r e dForward Relocation RequestC r e a t e B e a r e r R e q u e s tCreate Bearer RequestCreate Bearer Response目標(biāo) SGSN與目標(biāo) SGW建立上行承載 C r e a t e B e a r e r R e s p o n s eR e l o c a t i o n R e q u e s tR e l o c a t i o n R e q u e s t A c k建立 NodeB與RNC的 Iub連接 C r e a t e B e a r e r R e q u e s tC r e a t e B e a r e r R e s p o n s eForward Relocation ResponseC r e a t e B e a r e r R e q u e s tC r e a t e B e a r e r R e s p o n s eH a n d o v e r C o m m a n d切換準(zhǔn)備過程 LTE切換信令流程 59 LTE到 TDSCDMA切換 UE eNodeB NodeB MME SSGW SGSN TSGW PGW RNC M o b ility F ro m E U T R A N C o m m a n dH a n d o v e r t o U T R A N C o m p l e t eH andover to U TR A N C om pleteR e l o c a t i o n C o m p l e t eForward Relocation CompleteF o rw a rd R e lo c a tio n C o m p le te A c kU p d a t e B e a r e r R e q u e s tUpdate Bearer RequestUpdate Bearer ResponseU p d a t e B e a r e r R e s p o n s eTD網(wǎng) RAU流程 D e l e t e B e a r e r R e q u e s tU E C O N T E X T R E L E A S E C O M P L E T ED e l e t e B e a r e r R e s p o n s e切換執(zhí)行過程 源 MME與源SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 目標(biāo) MME與目標(biāo) SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 LTE切換信令流程 60 TDSCDMA到 LTE切換 UE SNodeB SRNC SSGSN SSGW TMME TSGW PGW TeNodeB measurementReportForward Relocation RequestC r e a t e B e a r e r R e q u e s tCreate Bearer RequestCreate Bearer Response目標(biāo) MME與目標(biāo) SGW建立上行承載 C r e a t e B e a r e r R e s p o n s eForward Relocation Response切換準(zhǔn)備過程 m easurem entR eportR e l o c a t i o n R e q u i r e dH a n d o v e r R e q u e s tH a n d o v e r R e q u e s t A c kI n d i r e c t d a t a f o r w a r d i n g t u n n e l s r e q u e s tI n d i r e c t d a t a f o r w a r d i n g t u n n e l s r e s p o n s eI n d i r e c t d a t a f o r w a r d i n g t u n n e l s r e q u e s tI n d i r e c t d a t a f o r w a r d i n g t u n n e l s r e s p o n s eR e l o c a t i o n C o m m a n dLTE切換信令流程 61 TDSCDMA到 LTE切換 UE SNodeB SRNC SSGSN SSGW TMME TSGW PGW TeNodeB H O F r o m U T R A N C o m m a n dH O F r o m U T R A N C o m m a n dr r c C o n n e c t i o n R e c o n f i g u r a t i o n C o m p l e t eF o r w a r d D L d a t aForw ard D L dataF o r w a r d D L d a t aH a n d O v e r N o t i f yForward Relocation CompleteF o rw a rd R e lo c a tio n C o m p le te A C KM o d i f y B e a r e r R e q u e s tM odify Bearer RequestModify Bearer ResponseM o d i f y B e a r e r R e s p o n s eD e l e t e B e a r e r R e q u e s tI u r e l e a s e c o m m a n dD e l e t e B e a r e r R e s p o n s eI u r e l e a s e c o m p l e t eLTE網(wǎng) TAU流程 切換執(zhí)行過程 源 MME與源SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 目標(biāo) SGSN與目標(biāo) SGW建立數(shù)據(jù)轉(zhuǎn)發(fā)承載 LTE切換信令流程 62 LTE到 GERAN切換 UE eNodeB BTS MME SSGW SGSN TSGW PGW BSC measurementReportH a n d o v e r R e q u i r e dForward Relocation RequestC r e a t e B e a r e r R e q u e s tCreate Bearer RequestCreate Bearer Response目標(biāo) SGSN與目標(biāo) SGW建立上行承載 C r e a t e B e a r e r R e s p o n s eR e l o c a t i o n R e q u e s tR e l o c a t i o n R e q u e s t A c kC r e a t e B e a r e r R e q u e s tC r e a t e B e a r e r R e s p o n s eForward Relocation ResponseC r e a t e