Huawei MSC Pool Overview
-
Upload
nguyen-manh -
Category
Documents
-
view
342 -
download
5
Transcript of Huawei MSC Pool Overview
HUAWEI MSC POOL
Over View
N i DungT ng quan v MSC Pool(MiP) Cc khi ni m c b n trong MiP Cc v n c b n trong MiP
T ng quan
MSC Pool l m t m hnh u n i m i c pht tri n trn m hnh u n i MSC-BSC/RNC hi n t i. Trong m hnh MSC Pool, m i BSC/RNC c u n i v i t t c cc MSC trong Pool. M t s u i m chnh c a MSC Pool l: S d ng chung ti nguyn, cn b ng t i trn cc MSC, gi m s l n Location Update, gi m Handover inter MSC, t ng c ng kh n ng d phng cho MSC v kh n ng UCTT t c th i khi MSC b s c .
T ng quan
MSC1
MSC2
M ng hi n t iBSC1/ RNC1 BSC2/ RNC2 BSC3/ RNC3
MSC1
MSC2
MSC PoolBSC1/ RNC1 BSC2/ RNC2 BSC3/ RNC3
MSC pool capacityItem Maximum capacity supported by an MSC Pool Specifications Number of MSC servers Number of MGWs Number of connected RNCs (ATM networking mode) Maximum capacity supported by an MGW Number of connected BSCs (TDM networking mode) Number of connected BSCs/RNCs (IP networking mode) Value 32 300 50
50
128
M t s khi ni m trong MiP
MSC Pool and MSC Pool areaMSC Pool MSC1 MSC2
MSC Pool areaBSC1/ RNC1 BSC2/ RNC2 BSC3/ RNC3 BSC4/ RNC4
BSC/RNC out side
M t s khi ni m trong MiP
TMSI and NRI
TMSI: Temporary Mobile Station Identity NRI: network resource identifierTMSI
31 30
29 VLR restart
28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 ...
0
CS/PS
NRI range
NRI value
User infor
M t s khi ni m trong MiP
Null NRI: l m t gi tr c bi t c a NRI dng trong vi c thng bo r ng MSC ang out of service. Non-broadcast LAI: dng yu c u MS th c hi n LU sang MSC khc khi tr ng thi c a MSC c set l out of service. Virtual MGW: M t MGW th c c th c chia thnh nhi u MGW o, m i MGW o n i n 1 MSC_S.
M t s khi ni m trong MiP
Iu-Flex, A-Flex: L tnh n ng cho php RNC ho c BSC c th th c hi n u n i n nhi u MSC cng lc. Iu-Flex, A-Flex on MGW: L ch c n ng h tr RNC/BSC u n i n nhi u MSC cng lc trong tr ng h p RNC/BSC khng h tr Flex function.
Cc v n
c b n trong MiP
Load Balancing Cn b ng t i MGW v MGW qu n l CIC Location update Hand over Paging UCTT t c th i trong MiP
Load Balancing trong MiPLoad Balancing l thu t ton c BSC/RNC l a ch n MSC ph c v MS trong tr ng h p MS attach vo h th ng l n u.
Load balance here.
MSC1
MSC2
BSC1/ RNC1
BSC2/ RNC2
BSC3/ RNC3
MS LU trong l n
u tin.
Cn b ng t i gi a cc MGWCu c g i t ngoi pool n: MSC_S trong pools th c hi n ch n 1 trong cc MGW c u n i n BSC ch a thu bao ch thng qua vi c t l s d ng knh u n i gi a MGW v BSC. Cu c g i gi a 2 MSC trong pool: th MSC_S ch s ch n cng MGW v t l v i MSC_S kh i t o. Cu c g i trong cng MSC trong pool: MSC_S s ch n VMGW ch cng v i VMGW kh i t o.
MGW qu n l CICi v i m ng hi n t i, MSC_S s qu n l cc CIC v c p pht trong t ng cu c g i. i v i MSC pool, m t MGW ck tn i n nhi u MSC_S cng lc, do n u m i MSC_S u qu n l v c p pht CIC th s ph c t p v khng t i u ti nguy n. Gi i php l CIC k t n i n BSC s c config trn MGW v c MGW qu n l, c p pht khi nh n c yu c u t cc MSC_S trong pool.
Location update trong MiPTrong MSC pool, vi c LU v n th c hi n nh thng th ng. Trong tr ng h p thu bao di chuy n trong vng MSC pool th MSC v n c gi nguyn nh l n u tin MS register v h th ng. MSC1 MSC2
BSC1/ RNC1
BSC2/ RNC2
LAC1
LAC2
Handover trong MiPHandover trong vng ph c v MSC Pool: Vi c handover khi thu bao di chuy n trong t t c cc BSC thu c MSC pool gi ng nh handover trong cng MSC. Handover t vng MSC pool ra ngoi v t ngoi vo trong MSC pool: gi ng nh tr ng h p handover gi a 2 MSC thng th ng.
Paging trong MiPTrong MSC pool, vi c paging v n c th c hi n thng qua TMSI ho c IMSI nh bnh th ng. Khi BSC nh n c thng tin respone t thu bao c ch a TMSI(NRI) th BSC forward n MSC thng qua NRI. Khi BSC nh n c thng tin respone t thu bao ch ch a IMSI th BSC s l a ch n MSC forward b n tin thng qua vi c l u gi a t m th i IMSI tr c . Trong ton b MSC pool, vng ph c v l r t l n do c n cn nh c vi c th c hi n paging trn ton b cc LAI thu c MSC.
UCTT trong MiPMO call: Trong MSC pool, khi 1 MSC b s c th BSC s nh n ra i u ny v route t t cc cc d ch v c kh i t o sang 1 MSC khc trong pool theo thu t ton cn b ng t i:
i v i MS register m i: MSC trong pool s LU bnh th ng v cung c p d ch v . i v i MS c , thu c MSC l i: MSC m i s th c hi n LU t c th i v cho php d ch v nh bnh th ng
UCTT trong MiPMT call: Trong tr ng h p 1 MSC trong pool b s c , HLR khng th PRN thnh cng nn cu c g i s b fail, kh c ph c th trong MSC pool th c hi n nh sau:
HLR
STP
MSC1
MSC 2 MSC Pool
MSC3
Th c hi n khai bo backup trn STP g i PRN n MSC d phng trong pool. Th c hi n khai bo backup thng tin thu bao (IMSI, LAI, status) sang VLR d phng trong pool.
UCTT trong MiP (MT cont)MT call:
HLR
MSC3 nh n c PRN t HLR v n th c hi n paging n MS v i IMSI v LAI c c. Khi BSC nh n c response t thu bao v i IMSI, BSC s th c hi n forward n MSC3. MSC3 nh n c b n tin c a BSC, n s th c hi n LU t c th cho thu bao sau PRN cho HLR v cho php k t n i cu c g i nh bnh th ng.
STP
MSC1
MSC 2 MSC Pool
MSC3
Backup VLR
Thank you!