LTE технологийн талаар
Улаанбаатар 2013
Үүрэн холбооны технологийн хөгжил
Convergence of telecommunication technology permits the manipulation of all forms of
information, voice, data, and video. Telecommunication has changed from a world of scarcity
to one of seemingly limitless capacity.
Үүрэн холбооны технологийн хөгжил
Due to the network evolution and multimedia service, Data traffic explosion
will happen severely in the mobile world.
Үүрэн холбооны технологийн хөгжил
Үүрэн холбооны технологийн хөгжил
Үүрэн холбооны технологийн хөгжил
As of Dec 2012, 145 operators in 66 countries have commercialized LTE networks,
and 90% of them use FD-LTE
【 LTE Service Area by End of 2012】
【 TD-LTE Service Map 】
North
South
America
America
42
22
29%
15%
Europe
Asia
No.
58
%
40%
Africa
SUM
14
9
145
10%
6%
100%
※ 13 commercial TD-LTE networks are launched
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FD-LTE: Frequency Division LTE, TD-LTE: Time Division LTE
LTE технологийн үндсэн үзүүлэлтүүд
 Scalable bandwidth of 20, 15, 10, 5, 3 and 1.4MHz
 Data Rate
– Instantaneous downlink peak data rate of 100Mbit/s in a
20MHz downlink spectrum(i.e. 5 bit/s/Hz)
– Instantaneous uplink peak data rate of 50Mbit/s in a 20MHz
uplink spectrum(i e.. 2 5. bit/s/Hz)
 Cell range
– 5 km optimal size
– 30km sizes with reasonable performance
– up to 100 km cell sizes supported with acceptable
performance
 Cell capacity
– up to 200 active users per cell(5 MHz) (i.e., 200 active data
clients)
LTE технологийн үндсэн үзүүлэлтүүд
LTE has high frequency efficiency compared to WCDMA and can cope with
data explosion situation in mobile market
VoLTE
adoption
LTE
adoption
Vacant
3G
Voice
3G
Voice
3G
Data
Vacant
Vacant
3G
Data
3G
Data
3 times
Frequency
Efficiency
1 ~ 3 times
Frequency
Efficiency
Frequency
Time
-8-
3G
Voice
Cope with
Data Explosion
LTE сүлжээний бүрдэл хэсгүүд
(MME/UPE)
E-UTRAN
EPC (Evolved Packet Core)
 No RNC, The evolved Node B take over all radio management functionality.
 All IP transport layer
UL/DL resource scheduling
Packet switched domain only
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LTE-A технологи
LTE-A comply with ITU-R requirements for 4G standards: 100Mbps for mobile
users and 1Gbps for low mobility communication
- 10 -
LTE-A carrier aggregation
For increasing capacity in LTE-A carrier aggregation is used. Each aggregated carrier is referred to as a
component carrier. The component carrier can have a bandwidth of 1.4, 3, 5, 10 or 20MHz and maximum
5 carriers can be aggregated
- 11 -
HetNet/eICIC
LTE Advanced Heterogeneous Networks (HetNet) use a mix of macro, Pico, femto and
relay base stations, effectively bringing the network closer to the user
- 12 -
High order MIMO
NTT DoCoMo announced the completion of a LTE-A trial where it archived a top rate of 5Gbps DL in
100MHz band using 12 transmit and 12 receive antennas at speed of 10km/h in 2007.
- 13 -
Voice service in LTE: circuit voice
LTE is a data focused technology, originally 3GPP not specified voice call service
There are 2 methods to provide circuit voice service in LTE Network named CSFB/SVLTE
- 14 -
Voice service in LTE: HD voice
VoLTE service named “HD Voice” to lead integrated, seamless communication
services in preparation for the coming All-IP environment
- 15 -
Cloud Belt
Cloud Belt(Ring MUX) is a solution to cut down network CapEx and OpEx and can increase network
O&M stability
- 16 -
Cloud Belt
It also result in less handover and better network KPI
- 17 -
Femtocell
LTE Femtocell can secure indoor quality with cost efficiency and easy to install, operate and can also
provide WiFi service simultaneously
- 18 -
Шинэ инженерт тавигдах шаардлага
Өнөө үед шинжлэх ухаан технологийн үсрэнгүй өөрчлөлттэй холбоотойгоор инженер хүн зөвхөн
бусдын санаа санаачлагыггүйцэтгэгч бус харин шинийг санаачлагч идэвхитэй багийн тоглогч байхыг
шаардаж байна.
- 19 -
Шинэ инженерт тавигдах шаардлага
Скайтел компаний хувьд шинээр инженер сонгон шалгаруулахдаа дараах
үндсэн шаардлагуудыг тавьдаг:
-
Онолын өндөр мэдлэгтэй байх
Аналитик/логик сэтгэлгээ
Бүтээлч
Багийн ажиллагаа
Хэлний мэдлэг
Байнгын суралцагч байх
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Нээлттэй ажлын байр
- Техник төлөвлөлтийн инженер – 2 (цахилгаан холбооны инженер 1,
мэдээллийн технологийн инженер 1)
- Систем админ – 1 (мэдээллийн технологи/ сүлжээний инженер)
- Радио холбооны инженер - 1
- Ээлжийн инженер – 1
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