Bao Hieu Seminar

7/28/2019 Bao Hieu Seminar

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TNG QUAN V BO HIU

Bo hiu?

Phn loihthng bo hiu

L ngn ngtrao i gia cc thit b c lin quan n cc chdn iu khin, gim st cc kt ni cuc gi


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SP l node trong mng bohiu, thc hin cc chcnng cah thng bo hiu,

mi SP c mt m ring vduy nht

STP l mt SP c kh nng nhtuynbn tin bo hiun cc imch khc nhau


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SL (signaling Link) l ngd liuktni 2 im bo hiu

SLS (signaling Link Set) l tphpmts cc ng bo hiu song song ktni cng cc im bo hiu

SR (signaling Route) L

ng bo hiu xc nhtrc truyn bn tin bo hiu tngunnchSRS (signaling Route Set)

Nhm tt c cc tuyn trongmng bo hiu m c thtruyn ti bn tin bo hiu tngunnch


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CC LOI BN TIN


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Table 3-2, pg 31


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CC LOI BN TIN


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CL CO

SCCP

MTP

TCAP

MAP

BSSAP ISUP

NSP

TUP


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Cu trc h thng GSM


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C IM CA GIAO THC MAP

Trong m hnh OSI giao thc MAP nm trn giao thc TCAP v u

tngngvilp 7 ca OSI. Giao thc ny cthitlp trongMSC, VLR, HLR, EIR thchin:

- ng k v tr

- Hubv tr

- ng k li

- Gim st, qun l, khiphcli cc dchv thu bao

- Chuyn giao

- Truyn cc thng tinbomt, nhnthc


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CC THNH PHN CA GIAO THC MAP

Mi SSN c SCCP s dng a ch ho mt thc thmng GSM c nh


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Mi Application Entities (AE) bao gm mt s ApplicationService Elements (ASE) . Cc ASE c nhm phc vcc chc nng chung v chc nng ring


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MT S CHC NNG CA ASE TRONG MAP

ASE btk trong MAP u c khnng giao tipvi cc ASEkhc mt cch ngthi:

- Cpnhtv tr (VLRHLR)

- Hubv tr (HLRVLR)

- Chn dliu thu bao (HLRVLR)


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MAP in MSC/VLR and HLR

Khi MAP trong mt node c th giao tip vi cc khi MAP ca node khc. Mikhi giao tip vi mt khi thnh vin c lin quan n chc nng tng ng ca khi


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Protocols between MSC and MS

Giao thcgia BSS v MSC gm 3 giao thc:- DTAP: Direct Transfer Application Part : Cc bn tin qun l di ng, iukhin

ktnicucgi ch knh ni, iukhin cc dchv cung cp c lin quanncucgi

- Initial MS Message:

- BSSMAP: Base Station Subsystem Management Application Part


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Cc bn tin qun l di ng ca DTAP


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Cc bn tin kt ni ch knh ca DTAP


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CC LOI BN TIN INITIAL MS MESSAGES


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BSSMAP Message Structure


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X l gi cho thu bao thuc PSTN v thu bao thuc mng GSM

MAP/TCAP

TUP/ISUP ISUP

ISUP

BSSAP

TUP

LAPD

LAPDm


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KT LUN

Bo co chuyn : Bo hiu trong mng GSM tm hiu c:

- Tng quan v mng bo hiu

- Cu trc cc bn tin bo hiu

- Chc nng v cu trc cc bn tin cho phn ng dng di ng

- X l cuc gi qua mng GSM thng qua bo hiu- Phng php khc phc khi bn tin bo hiu b li

Bao Hieu Seminar

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