ngan hang de ttdd
TRANSCRIPT
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Cu 1. Trnh by vic sp xp cc knh iu khin chung vo khe TS0 v tnhkhong thi gian thng tin iu khin trn cc knh c lp li?
Cu 2. Trnh by vic sp xp cc knh iu khin chung vo khe TS1v tnhkhong thi gian thng tin iu khin trn cc knh c lp li?
Cu 3. Trnh by cc knh logic trong GSM?
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Cu 4. T chc khung v cm trong GSM?
Cu 5. Cc phng php a truy cp trong thng tin di ng?
Cu 6. Cc knh logic CDMA?
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Cu 7. iu khin cng sut trong CDMA?
Cu 8. c im m PN?
Cu 9. Cu trc mng GSM?
Cu 10. Nhn thc trong GSM?
Cu 11. c im truyn sng trong thng tin di ng?
Cu 12. S x l thoi trong GSM, bin i A/D, m ha ting ni?
Cu 13. M ha knh trong GSM?
Cu 14. Nhiu C/A?
Cu 15. Tri ph trc tip v tri ph nhy tn?
Cu 16. iu khin cng sut trong CDMA?
Cu 17. iu khin chuyn giao trong CDMA?
Cu 18. Cu trc a l ca mng GSM?
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Cu 19.Nhiu C/I ?
Cu 20. Cc mu ti s dng tn s?
Cu 21. Cc loi m ha trong GPRS?
Cu 22. Qu trnh nng cp t cng ngh GSM (2G) ln cng ngh GPRS(2,5G) thc hin nh th no?
Cu 23.Cu trc Mng 3G theo chunWCDMA ?
Cu 24. Trnh by v bo hiu trong thng tin di ng?
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Cu 25. Suy hao ng truyn trong khng gian tdo c tnh theo cng thc:
Trong 1 cell, 1 MS ang lin lc vi BTS ti tn s
936 MHz. Hy cho bit:
a. Suy hao ng truyn khi MS cch BTS 3 km.
b. Gi s cng sut BTS ang pht sng l 20 W, hy cho bit MS c lin lc
c vi BTS khng khi nhy thu l -102 dBm ?
Cu 26. Theo m hnh Hata - Okomura
Ti vng th - URBAN
Lp (urb) = 69.55 + 26.16 * log(f) - 13.82*log(hb) -a(hm) +
( 44.9 - 6.55 * log( hb )) * log(d) (dB)
a(hm):H s hiu chnh anten MS,ph thuc din tch vng ph sng.
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- Din tch thnh ph trung bnh;
a(hm) = (1.1*log f - 0.7)hm -(1.56*log f - 0.8) (dB)
- Din tch thnh ph ln:
a(hm) = 8.29(log1.54hm)2
- 1.1 dB f = 300 MHz
Ti vng ngoi - SUBURBAN
Lp(sub) = Lp(urb)2 *( log(f/28))2 - 5.4 (dB)
Ti vng nng thn - RURAL (OPEN COUNTRY):
Lp(open) = Lp(urb)4.78 *(log(f))2 + 18.33*log(f) - 40.94 (dB)
Gi s ti mt cell vng ngoi , trm gc BS c cao 30 mt. Mt trm ding MS c cao anten trung bnh l 1,5 mt, ang lin lc vi trm gc titn s936 MHz. Hy xc nh:
a. Suy hao ng truyn khi MS cch BTS 3 km ?
b. Gi s cng sut BTS ang pht sng l 20 W, hy cho bit MS c lin lc
c vi BTS khng khi nhy my thu l -102 dBm ?
Cu 27.
Suy hao ng truyn trong khng gian tdo c tnh theo cng thc:
Trong 1 cell, 1 MS ang lin lc vi BTS ti tn s
950 MHz. Hy cho bit:
a. Suy hao ng truyn khi MS cch BTS 5 km.
b. Gi s cng sut BTS ang pht sng l 20 W, hy cho bit MS c lin lcc vi BTS khng khi nhy thu l -102 dBm ?
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Cu 28. Theo m hnh Hata - Okomura
Ti vng th - URBAN
Lp (urb) = 69.55 + 26.16 * log(f) - 13.82*log(hb) -a(hm) +
( 44.9 - 6.55 * log( hb )) * log(d) (dB)
a(hm):H s hiu chnh anten MS,ph thuc din tch vng ph sng.
- Din tch thnh ph trung bnh;
a(hm) = (1.1*log f - 0.7)hm -(1.56*log f - 0.8) (dB)
- Din tch thnh ph ln:
a(hm) = 8.29(log1.54hm)2
- 1.1 dB f = 300 MHz
Ti vng ngoi - SUBURBAN
Lp(sub) = Lp(urb)2 *( log(f/28))2 - 5.4 (dB)
Ti vng nng thn - RURAL (OPEN COUNTRY):
Lp(open) = Lp(urb)4.78 *(log(f))2 + 18.33*log(f) - 40.94 (dB)
Gi s ti mt cell vng ngoi , trm gc BS c cao 30 mt. Mt trm ding MS c cao anten trung bnh l 1,5 mt, ang lin lc vi trm gc titn s 950 MHz. Hy xc nh:
a. Suy hao ng truyn khi MS cch BTS 5 km ?
b. Gi s cng sut BTS ang pht sng l 20 W, hy cho bit MS c lin lc
c vi BTS khng khi nhy my thu l -102 dBm ?
Cu 29.Suy hao ng truyn m hnh cost231:
Lp(urb) = 46.3 + 33.9*log(f) - 13.82*log(hb) - a(hm)
+ [44.9 - 6.55*log(hb)]*log(d) + Cm (dB)
vi:
a(hm) = [1.1*log(f) - 0.7]*hm - [1.56*log(f) - 0.8]
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Ti thnh ph ctrung bnh hoc trung tm ngoi
Cm = 0 dB
Ti trung tm th
Cm = 3 dB
Gi s ti mt cell vng ngoi , trm gc BS c cao 30 mt. Mt trm ding MS c cao anten trung bnh l 1,5 mt, ang lin lc vi trm gc titn s 950 MHz. Hy xc nh:
a. Suy hao ng truyn khi MS cch BTS 5 km ?
b. Gi s cng sut BTS ang pht sng l 20 W, hy cho bit MS c lin lcc vi BTS khng khi nhy my thu l -102 dBm ?
Cu 30. Cho s chuyn giao sau, cho bit y l loi chuyn giao no vtrnh by qu trnh chuyn giao ny?
Cu 31. Cho s chuyn giao sau, cho bit y l loi chuyn giao no vtrnh by qu trnh chuyn giao ny?
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Cu 32. Cho s chuyn giao sau, cho bit y l loi chuyn giao no vtrnh by qu trnh chuyn giao ny?
Cu 33. Trnh by qu trnh thc hin dch v bn tin ngn SMS?
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Cu 34. Trnh by qu trnh thc hin cuc gi ny?
Cu 35.Trnh by qu trnh thc hin cuc gi ny?
Cu 36. Trnh by cp nht v tr trong MSC/VLR mi
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Cu 37. Trnh by cp nht v triws trong cng MSC/VLR
Cu 38. Trnh by qu trnh nhp mng IMSI.
Cu 39. Trnh by cc trng hp c khi MS trng thi ri
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Cu 40.Trnh by cc trng hp c khi MS trng thi bn
Cu 41.
Mng Viettel c cp 40 tn s, s dng mu lp 7/21 th hin lp tn s?
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Cu 42.
Mng Viettel c cp 40 tn s, s dng mu lp 3/9 th hin lp tn s?
Cu 43.
Mng Viettel c cp 40 tn s, s dng mu lp 4/12 th hin lp tn s?
Cu 44.
Mng Mobifone c cp 24 tn s, s dng mu lp 3/9 th hin lp tn s?
Cu 45.
Mng Mobifone c cp 24 tn s, s dng mu lp 4/12 th hin lp tn s?
Cu 46.
Mng Mobifone c cp 24 tn s, s dng mu lp 7/21 th hin lp tn s?
Cu 47.
Mng Vinafone c cp 30 tn s, s dng mu lp 3/9 th hin lp tn s?
Cu 48.
Mng Vinafone c cp 30 tn s, s dng mu lp 4/12 th hin lp tn s?
Cu 49
Mng Vinafone c cp 30 tn s, s dng mu lp 7/21 th hin lp tn s?
Cu 50
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