Tng quan v mng di ngCDiT - 2013Trnh by: D Anh Tun Phng NCPT Mng & H thng Mobile: 0903280403Email: email@example.comMc ch ca bui hcGip hc vin nm bt c:Cc khi nim c bn v mng di ngS khc bit gia cc th h mng di ng 2G, 3G, 4G.Tnh hnh pht trin ca cc mng di ng ca VN ni chung v ca VNPT ni ring.March 3, 20132Ni dungMt s khi nim c bnCc giai on pht trin ca mng di ngKin trc ca cc mng di ngHin trng mng di ng ca VNPT v ca cc nh mng khc ti Vit Nam.March 3, 20133Mt s khi nim c bn v mng di ngMarch 3, 20134Mng di ng l g?Mng di ng - mobile network (hay mng thng tin di ng mt t) cn c tn gi khc l mng thng tin di ng t bo (cellular network).y l mng v tuyn, c phn b theo cc cell, ti mi cell c mt trm thu pht sng thng c gi l cc trm BTS/NodeB.
March 3, 20135Cc dng Cell c s dng trong mng di ngMarch 3, 20136
Mng di ng 2GL mng di ng th h th 2 (Second Generation).c pht trin theo 2 nhnh chnh:a truy nhp phn chia theo thi gian (TDMA Time Division Multiple Access), in hnh l GSM.Ti VN: Vinaphone, Mobifone, Viettel, Gtel, Vietnamobile (trc y l HT Mobile).a truy nhp phn chia theo m (CDMA Code Division Multiple Access), in hnh l cdmaOne.Ti VN: S-Fone, EVN Telecom, HT Mobile (tn gi c ca Vietnamobile).Cc dch v in hnh:Voice Call, SMS.March 3, 20137Mng di ng 3GL mng di ng th h th 3 (Third Generation).c pht trin theo 2 nhnh chnh:UMTS (Universal Mobile Telecommunication System), da trn cng ngh truy cp v tuyn W-CDMA, l gii php ni chung thch hp vi cc nh khai thc dch v di ng (Mobile network operator) s dng GSM.Ti VN: Vinaphone, Mobifone, Viettel, VietnamobileCDMA2000 l th h k tip ca cc chun 2G cdmaOne.Ti VN: khng c nh mng no trin khai.Cc dch v in hnh:Video Call, MMS, Mobile TV, Mobile Internet, SMS, Voice Call.March 3, 20138Mng di ng 4GL mng di ng th h th 4 (Fourth Generation).Theo ITU (International Telecommunication Union) th c 2 nhm cng ngh u c coi l mng 4G:Khng p ng chun IMT-Advanced (Peak download 1 Gbps, Peak upload 500 Mbps): LTE, Mobile WiMAX (IEEE 802.16e), HSPA+.Ti VN: ang th nghim mng LTE.p ng IMT-Advanced: LTE-Advanced v WiMAX-Advanced (IEEE 802.16m).Ti VN: cha th nghim.Cc dch v in hnh:Mobile Internet tc cao, March 3, 20139Cc giai on pht trin ca mng di ngMarch 3, 20131010Cc giai on pht trin ca mng di ng
March 3, 201311First Generation (nearly all retired) Advanced Mobile Phone Service (AMPS) US trials 1978; deployed in Japan (79) & US (83) 800 MHz; two 20 MHz bands; TIA-553 Nordic Mobile Telephony (NMT) Sweden, Norway, Demark & Finland Launched 1981 450 MHz; later at 900 MHz (NMT900) Total Access Communications System (TACS) British design; similar to AMPS; deployed 1985.
2nd Generation 2G digital systems Leverage technology to increase capacity Speech compression; digital signal processing Utilize/extend Intelligent Network concepts Improve fraud prevention; Add new services Wide diversity of 2G systems IS-54/ IS-136 North American TDMA; & PDC (Japan) DECT and PHS; iDEN IS-95 CDMA (cdmaOne) GSM
*/1G-First generation (analog cellular) -Mang di ng th h 1 (chun analog)*/2G-Second generation (digital cellular) -Mang di ng th h th 2 (chun ky thut s)*/2.5G-Enhanced digital cellular -Mang di ng chun ky thut s nng cao*/3G-Third generation (multimedia cellular) -Mang di ng th h th 3 (a phng tin)*/4G-Fourth generation (broadband cellular)-Mang di ng th h th 4 (bng thng rng)*/GSM-Global System for Mobile-H thng truyn thng di ng toan cu, s dung hoan toan tin hiu s va c c thit k bi chu u*/HSPA-High-Speed Packet Access-Cac giao thc mi nhm nng cp va cai thin tc lu chuyn d liu trn mang UMTS. Bao gm HSDPA, HSUPA va HSOPA*/HSDPA-High-Speed Downlink Packet Access hoc High-Speed Downlink Protocol Access-1 Giao thc trong cng ngh mang di ng 3G. HSDPA giup nng cp ng truyn trn mang UMTS ln n 14.4 Mbps tc tai v trn ly thuyt. Thc t co th at n 3.6 Mbps tai v va 384 Kbps tc tai ln.11Cc giai on pht trin ca mng di ng (t)
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12Cc giai on pht trin ca in thoi di ng
March 3, 20131313Kin trc ca mng di ngMarch 3, 20131414Kin trc mng GSM
March 3, 201315Kin trc mng GPRS (2.5G)
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March 3, 201319So snh kin trc ca mng 3G v 4G
March 3, 201320So snh cc mng di ngChuyn mnh knh (CS)/ Chuyn mch gi (PS)
Tc d liu nh (L thuyt)Dch v c trng2G GSMCS9.6 KbpsVoice, SMS.2.5G GPRSCS + PS114 KbpsMMS, SMS, Voice Call, Mobile Internet.2.75G EDGECS + PS
384 KbpsMMS, SMS, Voice Call, Mobile Internet.3G UMTSCS + PS
2 MbpsMMS, SMS, Voice Call, Video Call, Mobile TV, Mobile Internet,4G HSPA+CS + PS168 MbpsMobile Internet, Video Call, Mobile TV, MMS, SMS, Voice Call,
4G LTEPS100 MbpsMobile Internet tc cao, HD Voice Call, 4G LTE advancedPS
1 GbpsMobile Internet tc cao, HD Voice Call,
March 3, 201321Hin trng mng di ng ca VNPT v ca cc nh mng khcti Vit Nam.March 3, 201322Mt s thng tin v hin trng cc mng di ng ti Vit NamNh mngCng nghThi im trin khai chnh thcDch v cung cpVNP (Vinaphone)2G26/6/1996Voice call, SMS,3G12/10/2009Video Call, Mobile TV, Mobile Internet, Mobile Broadband,VMS (Mobifone)2G16/4/1993Voice Call, SMS,3G15/12/2009Video Call, Mobile Internet, Mobile TV, Fast Connect (Mobile Broadband),Viettel2G15/10/2004Voice Call, SMS,3G25/03/2010Video Call, Mobile Internet, Mobile TV, Voice Call, SMS, MMSMarch 3, 201323Mt s thng tin v hin trng cc mng di ng ti Vit Nam(t)GtelMi trin khai mng 2G.Vietnamobile trin khai mng 3G.EVN Telecom st nhp vo Viettel.S-Fone xin chuyn t CDMA sang cng ngh 3G-WCDMA (UMTS850) v d tnh nm 2013 s pht sng mng 3G.
March 3, 201324Mt s thng tin v hin trng cc mng di ng ti Vit Nam(t)
March 3, 201325H tng truyn ti ca VNP, VMSMarch 3, 201326
- Cc nh trm: Thu VNPT Tnh/TP qun l- Truyn dn: Thu ca VNPT Tnh/TP hoc VTN.- S dng cc lung E1(TDM) /FE.- Truyn dn: Thu ca VNPT Tnh/TP hoc VTN.S dng cc lung E1, E3, (TDM) / FE, GE.- ang chuyn dn sang VN2.Kt ni n cc nh mng khc (Viettel, ) Hoc cc nh cung cp dch v, 3rd Party khc (Internet, IMS, ).M hnh kt ni ca VMS
March 3, 201327S kt ni gia Node-B vi RNC ca VMSMi trm BTS c cu hnh gm 2-4E1, trong , cu hnh 4E1 c s dng cho cc trm cu hnh cao (ti 10/10/10), tp trung ti cc khu vc c lu lng cao ti Tp HCM, HN, Mi trm node B c cu hnh 1E1 + 1FE, phn thoi v CS c chy trn ng E1, phn data/HSPA c chy trn ng FE. p ng tc HSDPA ti a 7.2Mbps, dung lng FE hin ti l 8Mbps.
March 3, 201328Tnh hnh th nghim mng 4G LTETrc xu th pht trin v p ng nhng mong mun ca cc doanh nghip vin thng, thng 9 nm 2010, B Thng tin v Truyn thng cp giy php th nghim cng ngh 4G cho 5 doanh nghip, bao gm VNPT, Viettel, CMC, FPT, v VTC. Cc doanh nghip c thi gian th nghim cng ngh 4G trong thi hn 1 nm nh gi cng ngh v nhu cu ca ngi s dng.Vi n lc ca cc n v trc tip tham gia d n, vo ngy 10 thng 10 nm 2010, Tp on Bu chnh Vin thng Vit Nam (VNPT) lp t trm pht sng cng ngh LTE u tin ti Vit Nam ti Nh Internet, L 2A, Lng Quc t Thng Long, Cu Giy, H Ni. T thng 12/2010, Tp on Vin thng Qun i (Viettel) trin khai xy dng th nghim mng 4G theo cng ngh LTE (Long Term Evolution) trn a bn H Ni.Vi FPT, ban u c mt s thng tin lin quan n vic lp t 4 trm pht sng phc v cho vic th nghim, nhng cng khng c thng tin g hn v kt qu hay cc thit b u cui c a vo th nghim. Ngoi 3 n v trn th CMC TI cng d kin s cung cp cc dch v trn nn tng 4G gm dch v truy cp internet bng thng rng, streaming video v s trin khai th nghim 4G trn hai a bn l H Ni v TPHCM nhng khng cng b thi gian c th, cn Cng ty Vin thng s ca VTC cho bit, cng ty ny s th nghim LTE khu vc H Ni, nhng vi quy m va mc nh gi, nhng cng khng cng b thi gian c th.March 3, 201329Q&A.March 3, 201330Trn trng cm n!March 3, 201331ng dng ca sng v tuyn trong i sngMarch 3, 201332
ng dng ca sng v tuyn trong i sng (t)March 3, 201333
ng dng ca sng v tuyn trong i sng (t)March 3, 201334
Mi quan h gia bc sng v tn sBc sng:
V: tc truyn sngF: tn sMarch 3, 201335
Cc cng ngh truy nhp c bn trong mng di ngMarch 3, 201336
FDMA (a truy nhp phn chia theo tn s): Mi cuc gi s s dng mt tn s.
CDMA (a truy nhp phn chia theo m): Cc cuc gi ng thi c s dng chung trong mt tn s.
TDMA (a truy nhp phn chia theo thi gian): Cc cuc gi s chim mt khong thi gian ng v vi mt tn s.
Difference between FDMA, CDMA and TDMA I guess, one of the most basic questions which goes in our mind regarding telecom is what is the difference between the technologies which people generally talks about? Right? They talk about CDMA, TDMA, FDMA! We know that these technologies are different but we genearlly are unable to understand the thingthat makes them difference! We think its too technical and stop ourselves from getting into it! Right? Guys believe me, understanding the difference between these technologies is just not difficult!
I will try to put it in a very simple way
Frequency division multiple access (FDMA): It is a technology by which the total bandwidth available to the system is divided into frequencies. This division is done between non overlapping frequencies that are then assigned to each communicating pair (2 phones)FDMA is used mainly for analog transmission. Its not that this technology is not capable of carrying digital information, but just that it is not considered to be an efficient method for digital transmission. Because just imagine if the frequencies to handle the customers gets over? What if more capacity is required? The only option would be to drill down the existing frequencies to a much narrower amount which will not be very competent. In FDMA all users share the satellite simultaneously but each user transmits at single frequency.To understand this technology better, just imagine how FM radio works. All the radios have their own frequency bands and they send their signals at the carefully allocated unique frequencies within the available bands.
Code division multiple access (CDMA):Unlike FDMA, CDMA separates calls by code. Every bit of a conversation is been tagged with a specific and unique code. The system gets a call, it allocates a unique code to that particular conversation, now the data is split into small parts and is tagged with the unique code given to the conversation of which they are part of. Now, this data in small pieces is sent over a number of the discrete frequencies available for use at any time in the specified range. The system then at the end reassembles the conversation from the coded bits and deliver it Does it make sense? Just think about how you recollect your luggage at the end of the flight journey. When you check in, a tag with a code is given to you which is also given to your luggage And at the destination, you collects your luggage on the basis of that I know you will say that you recognize your bag, but then I have a habit of always matching the codes of my bag and the one on the tag given to me and that is how I become sure of not picking up the wrong luggage
Time division multiple access (TDMA):Unlike FDMA and CDMA, In TDMA the division of calls happens on time basis. The system first digitizes the calls, and then combines those conversations into a unified digital stream on a single radio channel. Now it divides each cellular channel into three time slots that means three calls get put on a single frequency and then, a time slot is assigned to each call during the conversation, a regular space in a digital stream. The users transmit in rapid succession, one after the other, each using its own time slot. This allows multiple stations to share the same transmission medium (e.g. radio frequency channel) while using only a part of its channel capacity.This technology enables three different users to use one frequency at the same time.Here there is no need for three separate frequencies like in FDMA. As in FDMA, instead of monopolizing a single radio channel for a single call, TDMA efficiently carries three calls at the same timeBTW, this technology is the one used in our GSM system
Have tried to explain the above technologies via a diagram which is below:
36Cc cng ngh truy nhp c bn trong mng di ng (t)March 3, 201337
Khc bit gia CDMA v WCDMA1. CDMA l cng ngh truy nhp ca mng 2G cn WCDMA l cng ngh truy nhp ca mng 3G.2. CDMA v WCDMA khng c s dng ng thi.3. WCDMA c tc kt ni nhanh hn nhiu so vi CDMA.4. CDMA s dng cc di bng tn 1.25Mhz cn WCDMA s dng cc di bng tn 5Mhz.5. Kin trc ca WCDMA khc hn so vi CDMA.
March 3, 201338Khc bit gia UMTS v HSDPA1. UMTS l cng ngh mng 3G s dng WCDMA, HSDPA l bc pht trin k tip ca mng 3G, HSDPA tp trung vo vic tng tc download (c th ln n 42 Mbps).2. Ngoi ra HSDPA cng lm gim tr ca cc ng dng.
March 3, 201339Ti liu tham kho3G Tutorial Brough Turner & Marc Orange.Wireless Tutorial Brough Turner NMS Communications.Bi ging kha hc Cng ngh 3G WCDMA UMTS TS. Nguyn Phm Anh Dng.Mng UMTS TS. Nguyn Phm Anh Dng.http://en.wikipedia.org/wiki/2Ghttp://en.wikipedia.org/wiki/3Ghttp://en.wikipedia.org/wiki/4G
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