










TRƢƠ
̀
NG ĐA
̣
I HO
̣
C CÔNG NGHÊ
̣

===============
CAO THIÊ
̣
N THĂ
́
NG
LUÂ
̣
N VĂN THA
̣
C SĨ CÔNG NGHÊ
̣
ĐIÊ
̣
N TƢ
̉
- VIÊ
̃
N THÔNG H NI - 2013









A MÔ
̣
T SÔ
́

THUÂ
̣
T TOA
́
N LÂ
̣
P LI
̣
CH TRÊN ĐƢƠ
̀
NG
DOWNLINK TRONG MA
̣
NG LTE  n T - Vig


: K thun t
: 60 52 02 03 LUÂ
̣


 








  
.
 


, 02 12 
TÁC GIẢ CAO THIỆN THẮNG






s 

















  






























.









.
 , 









 ,  ,





























 






 , 







 

, 


, 02 12 
HỌC VIÊN CAO THIỆN THẮNG 3

DANH MU
̣
C KY
́
HIÊ
̣
U VA
̀
TƢ
̀
VIÊ
́
T TĂ
́
T

3GPP
Third Generation Partnership Project

HSDPA
High Speed Downlink Packet Access
LA
Link Adaptive
LTE
Long Term Evolution
MIMO
Multiple Input Multiple Output
MME
Mobile Management Entity
MS
Mobile Station
NACK
Not Acknowledge
OFDM
Orthogonal Frequency Division Multiplexing
OFDMA
Orthogonal Frequency Division Multiplex Access
OLSM
Open Loop Spatial Multiplexing
4

OPP
Object Oriented Programming
PBCH
Physical Broadcast Channel
PCFICH
Physical Control Format Indicator Channel
PDCCH
Physical Downlink Control Channel

UMTS
Universal Mobile Telecommunications System
UpPTS
Uplink Pilot Time Slot
WCDMA
Wideband Code Division Multiple Access
5

MC LC
LƠ
̀
I CAM ĐOAN 0
LƠ
̀
I CA
̉
M ƠN 2
DANH MU
̣
C KY
́
HIÊ
̣
U VA
̀
TƢ
̀

T QUA
̉
MÔ PHO
̉
NG 32
ng LTE System Level Simulator 32
ch bt qu ng 35
6

p lch s dng chung
c 36
3.2.2.









 44
3.2.3.



 45
3.2.4.




1.1.  17
 25
 37
 41
 45
C 45
  49
 51
8

DANH MU
̣
C HI
̀
NH A
̉
NH

1.1.  15
1.2. C 16
1.3. Frame loi 2 16
1.4. ng xung LTE 17
1.5. u tham chiu downlink LTE s dng tin t lp normal 19
1.6. ng downlink LTE 20
1.7. T chng downlink 21
1.8.  21
1.9. ng downlink LTE 22
2.1. n LA 24
2.2.  gi  25





,  42
9

3.9.   

 _speed = 0.1km/h, PF
scheduler 44
    

 _speed = 100km/h, PF
scheduler 44
3.11.  46
3.12.  46
 



5 UEs/cells, PF Scheduler 47
3.14.  



50UEs/cell, PF Scheduler 48
3.15. i 5 UEs/cel, PF Scheduler 48
3.16. i 50UEs/cell, PF Scheduler 49
3.17.   

 
      1       

 
     N       
 [3]   so

        trong  
LTE.







 , 

 






 



 , 
12

1
TỔNG QUAN VỀ MẠNG LTE





 

 

 3




3

. 
























 . 3





, 












LTE  
d Sau
  
 
 

LTE.
1.1. Một số đặc trƣng của mạng LTE
1.1.1.  
LTE 
 
  
- Downlink: 2 antenna thu 
- Uplink: 1 antenna  



 
 
              

14

  
gian TDD.   . 
 2 


   trong khi


1.1.6. 

 

 
 
, 

1.2. Tổng quan về đƣờng downlink LTE
               

 MS OFDMA 

 


15kHz1.2.
x 1 subcarrier
(frequency)  
 1   (RB) 1 timeslot x 12
subcarriers.  
,  
OFDM 
 
16
1.2.C [6]


FDD trong
rD.
Frame l 
            
lot (DwPTS),
Guard Period (GP) ilot Time Slot (UpPTS)

 
. 


.  1.3.

1.3.Frame loi 2

  OFDMA.  
QAM 
.
Kênh hoa tiêu dạng điều khiển PCFICH
  


Kênh điều khiển đƣơ
̀
ng xuô
́
ng PDCCH
PDCCH 
. 


Kênh truyê
̀
n multicast PMCH
              
              

Kênh hoa tiêu yêu câ
̀
u tƣ
̣
đô
̣
ng truyê
̀

                Hybrid
Automatic Retransmission Request (H-ARQ) 
 
20


t
1.6). 
















 

. 




1.6.ng downlink LTE
         TB    
nhau. 
 transmission diversity, 
        spatial multiplexing   
21





1.7. T chtuyng downlink
1.3. Mô hình kênh truyền đa anten MIMO

 
 thu 
ng 

 1.8.MMIMO
22





 



 n quan
, ng
trong  . 
LTE, ng. 
 

 LTE.



  
 eNodeB  
  ph  = 
k
 CQI, 
   


  

 

 eN 
 

