|
?淶?л???????β?跢2005420?С
?
?淶 ? ???????????????淶?л????淶
? 淶л????????????
淶?????????????????????????
??????淶涨?????
淶???????????????
淶?????????Ч?????????
л?????????????淶??淶???
????????????淶????
淶У???????
??????????????淶
????Ч???
?????涨??????棬?????
??????涨???档1?У???1й??в???棬????
? ??????????????Χ????
????·豸???缰????????????С??漰??????С?????????????档
?????????????漰???
? ????й???й?涨??Ч????????
? ?????????????????Χ????????绰?绰???????????
????????С?????
?? ???κη?????????豸??????????ú??в??
??绰??绰???????潨??绰???
? ?????????????????桢?
? ???÷??????????
????????????????????
????м?ж????
? ??????????飬??
??????????????绰????????????????????
??????????????
? ????????????÷г??
??????????????Υ?Σ???÷??????Ч????䶮
????????涨?????Σ????档
? ???????????б淶???????????λ??
? ???????淶??о??????淶?????
????涨????е???
? ???????й????????????淶???????
? ?????δ??淶?????????????棬???μ?䶮
?? ????????????1??
??? 涨2005420?У??????У?[2000]27????
?1?淶DD????绰?
?2?淶DD????
?3?淶DD??
?4?淶DDIP绰?
?5?淶DD??
?6?淶DD??
?7?淶DDС????VSAT??
?8?淶DD??? ?1 ?淶DD????绰?
1.1????绰???
1.1.1????????????1???绰????·?
1.1.2绰???:??15???25?
?壺??20???30?
绰?????????????????
1.1.3绰?:??12С???24С?
绰?????????й??绰?????
1.1.4?л??:??12С???24С?
?л????????绰??????????
1.1.5????:??12С???24С?
??????????????????
1.1.6绰???:??24С???48С?
?壺??36С???72С?
绰?????????????????1 ?1?????о?л??·豸?? 1.1.7?????绰?????45????15???μ?绰????45?????????绰???????????
1.1.8绰???90?
绰???ú????
1.1.9绰??????????15?
?(??)????????????
绰??????????15????85
?????????????????绰??????????????????
1.1.10????涨?绰????绰????95
绰?????绰?????????????????
1.1.11?????绰ù淶?????÷??????????????????????顣
1.1.12?????????嵥????5?
1.2????绰??
1.2.1??:??0.8???1?
??????
1.2.2??
????绰???е??????1.9???5.3?й????10?
????绰???е??????2.2???7?й????12?
?绰???????????????2.3???7.2?й????13?
????????????
1.2.3?:?????е?????95
??????е?????90
?绰?????????е???85
??У??80
???????????????Чд??????????
УЧд=д-(???+??+??+?)
1.2.4:????21dB
???佨???
1.2.5?:??0.1???1
1.2.6?:г????1
1.2.7?:????????0.1
???????1
1.2.8?:?绰?13?
????·??85?
??DCME豸?μ?·??150?
1.2.9?ж:?ж?2104
?ж????У???
1.2.10?????
???????20???45?
??????????????????????????н?+??????з?+??к??????
1.2.11????:?????95
????????м????????Ч?м???
1.2.12??洢Ч:???洢Ч?72С?
???洢Ч???????????????????Ч洢?Ρ??洢??????жη???????????
1.2.13??:????10???24С?????99
????????????????
?????涨?????????????
1.2.14??:?? 104
???豸?????1??
?м????=д?/?
????Σ??=/? ?2 ?淶DD????
2.1??????
2.1.1????縲?ΧηΧ
2.1.2????????????1???绰????·?
2.1.3?绰?:??1С???24С?
?绰?????????й???绰?????
2.1.4?绰??:??1С???24С?
?绰????????????????
2.1.5?绰????:??24С???48С?
?绰???????????????????绰??????
2.1.6?????绰????45????15???μ?绰????45?????????绰???????????
2.1.7?绰???90?
?绰???ú????
2.1.8绰??????????15?
?(??)?????????????
绰????????15????85
?????????????????绰??????????????????
2.1.9?????????嵥??????绰????????????5?
2.2??????
2.2.1?:縲?90λ?99??20???硣
2.2.2?:??????У??90
???????У??85
?У??У??80
????????????в?к?ε???Чд??????????
2.2.3??
??????????9???12.5?
??????????9???16?
??????????10.3???19?
???????????????
2.2.4?ж??:?5
???У???
2.2.5????:???3
???????????
2.2.6?????:??????99
?????????????￡????
2.2.7????
??????3???24С???????95
?????????????￡???
???????涨?????????????
2.2.8????:?????105
????????????24С?????￡?н????
2.2.9???洢Ч
???洢Ч?72С?
???洢Ч?????????б???????Ч洢?Ρ??洢?????жγ???????????
2.2.10??:???104
???豸?????1??
??=д?/?
?3?淶DD??
3.1????
3.1.1????
3.1.1.1??????翪??
??12С???24С?
??????翪????????й????????
3.1.1.2????????
??12С???24С?
?????????????????????
3.1.1.3????????????????
3.1.1.4?????????
3.1.1.5?豸???:??8С???12С?
?豸?????????????????
3.1.2????
3.1.2.1???:??90
?????????????
3.1.2.2????:???8???11?
??????????????????
3.1.2.3 ??:???99
??????μ???
????????ий?99%???????
3.2????
3.2.1????
3.2.1.1??????????縲??Χ??
3.2.1.2??:??3???5?
??????????????????
3.2.1.3??:??2???4?
?????????磬?????
?:???в?С?·??
3.2.1.4?豸???:??8С???12С?
?豸?????????????????
3.2.2????
С?涨???Χ??????IP?λ?е??????????е??()Щ????????У?о?1000?
3.2.2.1IP?:???200?
IP????IP???(A)???(B)????(A)???
3.2.2.2IP??仯:??仯??80?
IP??仯??β??IP?IPС????
3.2.2.3IP?:???2%
IP??IP?????
3.2.2.4IP?:IP??99.9
IP?????IP??IP?????5??IP????75????????
3.3X.25DDN?м????
3.3.1X.25DDN?м????
3.3.1.1??:??4???8?
??????????????????
3.3.1.2??
???3???5?
????4???7?
???????????????
3.3.1.3?豸???:??4С???8С?
?豸?????????????????
3.3.2X.25DDN?м????
3.3.2.1X.25????
3.3.2.1.1н???1
??н??????????????1н?????1еX?2
3.3.2.1.2?鴫???3
?鴫?????????,÷???????3 ?鴫?????3еY?4
1н?????
?? () ???() ()
A B A B A B
?? 2000+2X 2600+2X 1000+X 1600+X 250 1600
95? 2700+2X 3100+2X 1500+X 2100+X 250 1800
?1.95?ζ95?н????2.A???3.B????·????ε?4.A?????·?5.B???·??Σ??·??ε?6.X=400/RR????λkbit/s7.?DУδ?ITU-T X.25?涨κ????зκκ??D?涨??·??????D?н?·?漰25λ顣
2н?????X?
R(kbit/s) X()
2.4 167
4.8 84
9.6 42
48.0 9
64.0 6
3?鴫?????
?? () ???() ()
A B A B A B
?? 700+2Y 1000+2Y 350+Y 650+Y 215 950
95%?? 950+2Y 1250+2Y 525+Y 825+Y 215 1125
?1.?????鴫????,涨????2.95?ζ95?鴫????3.AB4.2?4.?D??ε??128λ飬??Σ·?136λ飻D?涨???DTE·?????
4?鴫?????Y?
R(kbit/s) Y()
2.4 453
4.8 227
9.6 113
48.0 23
64.0 20
?:R????λkbit/s
3.3.2.1.3??5
??λ???????γ?(????)???5???
5???
?? ?bit/s ?bit/s
A B A B
?? 3500 2400 2000 2000
95? 2400 2000 1800 1800
?1.??????2.95?ζ95???3.AB4.2?4.?D·?·?9600bit/s?D??γ?128λ飬??D·ε?鴰?С?2·??С?7D?D?D=0DЩ?κδ???D?????豸??D???2002?
3.3.2.1.4н??н??95
н??н??????δ
3.3.2.1.5??99.99
???????????
3.3.2.2DDN????
3.3.2.2.1???
1?·
?·????UNIDDN????·?????·
?M.2100顶PDH?κ???????M.2101顶SDH????????
2?·
?·????UNI????·
?YD/T748-95PDH????YDN 026-1997SDH?DSDH???ε??????
3.3.2.2.2????
164kbit/s??·???40?
22Mbit/s??·????0.5N+0.005G?N?·?豸G?·?km
31?2???·???300?
?DDN?????????
3.3.2.2.3??99.99
????????????
3.3.2.3?м????
3.3.2.3.1??(FTD)??(FTD)< 400?
????????м???
?????FTD= t2-t1
?Уt1????ε?1??????
t2??β???????
3.3.2.3.2??(FLR)??(FLR)< 3X10-5
????????з???
?????FLR=
?УFL ?????FS ????
FE ??
???????(CIR)??????(FLRE)???(FLRC)?
3.3.2.3.3???99.99
????????????
?4?淶DDIP绰?
4.1IP绰???
4.1.1??????IP??СIP????Э?????????У????ɡ???????
4.1.2к??IP绰??
??24С???48С?
к??IP绰???????й??IP绰????
4.1.3к??IP绰?
??24С???48С?
к??IP绰????IP绰???й??IP绰?????
4.1.4??IP绰?????????????
4.1.5??IP绰???????β????
4.1.6IP绰?豸????
??12С???24С?
IP绰?豸?????????????????IP绰?豸????????IP绰???豸?
4.1.7?????к??IP绰??IP绰??嵥?л嵥?IP绰????5?
4.2IP绰???
4.2.1??
???????7???11?
???????11???21?
???????11???15?
???????15???24?
?β??????绰?λ????????
?β??????IP绰?λ?????λ????绰?λ?
4.2.2?????400?
???·????????
4.2.3??仯??仯??80?
??仯????γ?IPIP紫????β??IP?IPС????
4.2.4???5
????γ?RTPIP紫????RTP(??RTP)?RTP??
4.2.5????н??72
??н??????????yв???Ч???
4.2.6?ж??ж?5
?ж????У?ж???
?5?淶DD??
5.1????
5.1.1?????????????Χ????Χ
5.1.2???????12С???24С?
???????????й????????
5.1.3??????15?
??????????????
5.1.4????????
5.1.5????????????e????????10??e??????????10??
5.1.6????????????????
5.1.7?????90?
?????ú?????
5.1.8??????????????????
???λ???С15???151?
5.2????
5.2.1????
?λ???????????6?
?λ????????????10?
??????????????????????????????
5.2.2????????95????
????м??????Ч?????????м?
5.2.3??
?У???60???400?
?У??90?
?У??7?
?У??7?
κУ??10?
???????????????????в????
5.2.4??????95
????????????? ?6?淶DD??
6.1????и??????÷???????????????
6.2?????κг?????????????????????????
???????????????б????δ?????
??????????????????????????
6.3?????????δ????????????Σ????????????????????????
6.4???????岥????????????????ù??
6.5???????????飬????????????95?
6.6?????????????????????000000000???????
??????????????
6.7?????????????????????????绰?5???????????????嵥
6.8????绰????????????????????????????
6.9????????????????????Э???á
6.10???????绰?
?7?淶DDС????VSAT??
7.1С????VSAT????
7.1.1?????20???30?
???25???40?
???????????????????????豸???豸?????????
7.1.2??????3???7?
???7???15?
????????????????????????豸???豸?????????
7.1.3??
??VSAT????绰????VSAT??????
7.2С????(VSAT)????
7.2.1???
???99.5C???Ku???
???????????????VSAT?????豸?
7.2.2????????92
????VSAT??????VSAT???VSAT??????????ο?1???????????
7.2.3????
VSAT????????8???14?
VSAT????????16???25?
??VSAT??????11???18?
VSAT??????????4???8?
7.2.4?ж????ж?2104
???ж?????Э?
?ж????УVSAT????ж???
7.2.5????????107
?????VSAT????VSAT?????????
7.2.6??????104
????豸?????
?8?淶DD???
8.1?????
8.1.1??
8.1.1.1??·??
??3???5?
8.1.1.2?·??
??4???8?
8.1.1.3PDH??VC-n??????μ?????????????Э?
???????????????
8.1.2??
8.1.2.1??·?????20???30?
8.1.2.2?·????33.3.1.2?
8.1.2.3PDH??VC-n??????μ??????????????Э?
?????????????????
8.1.3???
8.1.3.1??·??????24С???48С?
8.1.3.2?·?????33.3.1.3?
8.1.3.3PDH??VC-n??????μ???????????????Э?
?????????????????
8.1.4??????24С???48С?
??????????????????
8.2?????
8.2.1?·??
?·?绰????????????桢???桢??仯λ?桢???䴙г??档???????GB 11053??·?GB 11054?·??
8.2.2?·???33.3.2.2ей??
8.2.3PDH??VC-n????
PDH???283445140Mbit/s???
VC-n???VC-12VC-3VC-4VC-4-Xc????
PDH??VC-n?????????????????
8.2.3.1
PDH????YD/T 748PDH?????
VC-n????YDN 026SDH?--SDH???ε??????
8.2.3.2?
?PDH??VC-n?????(0.5N+0.005G)?N?豸?G?
8.2.3.3
?????ò???????????????÷?????????Э?
8.2.4???o?μ??
???o????????o?μ???
???μ??????????YDN 099????
μ????????Э?
8.2.5??????
?????????????????????????????????YD/T 1012????м????? | 
3 37020202000334