Jaloliddin BoykulovJaloliddin Boykulov
 
Instantaneous downlink peak data rate of at least 100 Mb/s within 20 MHz
Instantaneous uplink peak data rate of 50 Mb/s
E-UTRAN optimised for low mobile speed: 0-15 km/h. Higher mobile speed
between 15-120 km/h should be supported with high performance. Mobility
shall be maintained at speeds 120km/h-350km/h (or even up to 500 km/h
depending on the frequency band)
Spectrum flexibility: scalable to operate in 1.4, 2.5, 5, 10, 15 and 20Mhz;
Co-existence with GERAN/3G on adjacent channels: with other operators on
adjacent channels: overlapping or adjacent spectrum at country borders:
handover with UTRAN and GERAN
 
LTE is the natural evolution for GSM and HSPA network operators
Re-use of several existing network assets
Deliver new, improved services and applications
With LTE, an operator can achieve a sustainable competitive advantage
LTE also brings a much improved Business Proposition compared to the
legacy technologies
Spectrum flexibility: Can use new or re-farmed spectrum, FDD and TDD.
Variable channel bandwidth
 
• UzACI license on allocation of frequency bands for LTE equipment (in our case 700Mhz, 2.6GHz);
• Resolution of GKRCH on usage LTE equipment in telecommunication networks of Uzbekistan;
• CEMS permission for import of equipment across the border of Uzbekistan;
• Lease contract with Landlord of building/greenfield for installation 2G/3G/LTE equipment;
• Permission from National AirLines for installation of LTE equipment;
• Permission from CSSES (Center of State Sanitary and Epidemiological Surveillance) for installation of LTE equipment with compliance level of the electromagnetic radiation;
• SEMS permission for design, construction & operation of LTE eNode-B;
 
• LTE provides flexibility for spectrum re-farming and new spectrum
• LTE can operate in a number of different frequency bands
• Simplified, flat network architecture based on IP reduces operators’ cost per bit significantly
• Interworking with legacy systems is an integral part of service continuity
• Re-use of existing equipment as much as possible
Improved flexible radio technology Simpler architecture for reduced OPEX
 
  s
f 
f 
t
f 
t
f 
• Orthogonal
subcarriers
 – 15 kHz subcarrier spacing
 – 20 MHz = 1200 subcarriers
 – 10 MHz = 600 subcarriers etc.
 – Scalability between 1.4 – 20 MHz ( 1.4 / 3.0 / 5.0 / 10 / 20 MHz )
Up to 20 MHz (1200 subcarriers)
15 kHz
Downlink:
OFDMA
• User multiplexing in frequency domain
• Terminals are required to be able to receive up to 20 MHz
but only to transmit up to 10 MHz
IFFT 
several Tx antennas
•Spatial multiplexing (SM)
several Tx antennas
•Spatial multiplexing (SM)
MIMO• Physical Broadcast Channel (PBCH): The transport blocks are mapped
into four subframes within a 40-ms interval and then decoded with no special
signaling. This channel is used for correcting mobile frequencies, control
channel structure, frame synchronization, and etc.;
• Physical Control Format Indicator Channel (PCFICH): This channel is
transmitted in every subframe and indicates the number of OFDMA symbols
used for the PDCCH;
• Physical Downlink Control Channel (PDCCH): This channel carries the
uplink scheduling information and informs the UE about resource allocation and
hybrid automatic repeat request (HARQ) for the paging channel (PCH) and the
downlink synchronization channel (DL-SCH);
the HARQ of acknowledge/not-acknowledge (ACK/NACK) for the uplink
transmissions;
• Physical Downlink/Uplink Shared Channel (PDSCH/PUSCH): This
channel carries the DL synchronization channel (SCH) and UL-SCH as well as
PCH information;
information;
MIMO• Physical Uplink Control Channel (PUCCH): This channel carries HARQ
for the downlink transmissions, as well as scheduling requests and channel
quality indicator (CQI) reports;
random access preamble;
Downlink
Uplink
LTE performance targets for Throughput and Latency Initially up to 173Mbps DL, 58Mbps UL and latency of 10-20ms
Latency (Rountrip delay) *
0 20 40 60 80 100 120 140 160 180 200
LTE
HSPAevo
min max
 
• LTE handover principles • Lossless: Packets are forwarded from the source to the target • Network-controlled:
Target cell is selected by the network, not by the UE • UE-assisted: Measurements are reported by the UE to the network • Late path switch:
Only once the handover is successful, EPC is involved
MME
UE
Serving
MME
UE
Serving
 
FS
SA
BPLPM
 – WEIGHT: <= 15 Kg
 – System Module
System Module
3-sector RF
 
complete 3 sector
S y s te m  Mod u le
 WC D M A /  L T E
 R F  Mod u le
 
BBUBBU
On the Wall
RRURRU
BBU & RRU indoor
http://www.gsacom.com/downloads/pdf/Global_LTE_commitments_and_trials_List_110511.php