How To Extend LTE Coverage With Limited RRU Capacity Read Only PDF
How To Extend LTE Coverage With Limited RRU Capacity Read Only PDF
How To Extend LTE Coverage With Limited RRU Capacity Read Only PDF
UE RSRP_Pa -54.77dBm
0
1.Power per port antenna
0
@maxRRU 43dBm(20Wat),configuration 2T2R MIMO
1
@Power single port = pRRU-10Log (No. Antenna port)
= 43-10log (2)
2
@Power single port = 39.99 dBm or 10Wat/Antenna port
T E 0 ,1 , 2 ,3
L
2. Extend Coverage by Power bossing(PB) Level
0+1) = 15.22 dBm
@PB:0 CRS = 39.9 – 10 log(25*12)+10Log(
0
1.Power per port antenna
0
@maxRRU 46dBm(40Wat),configuration 2T2R MIMO
8
@Power single port = pRRU-10Log (No. Antenna port)
= 46-10log (2)
1
@Power single port = 42.9 dBm or 20Wat/Antenna port
T E 0 ,1 , 2 ,3
L
2. Extend Coverage by Power bossing(PB) Level
0+1) = 18.22 dBm
@PB:0 CRS = 42.9 – 10 log(100*12)+10Log(
30-35Mbps
25-30Mbps
20-25Mbps
15-20Mbps
10-15Mbps
CRS gain
eters
Ki lom
RSRP
5. How to CRS gain configuration 3 Vendors (Huawei,
Ericsson, Nokia) Existing Configuration Propose Configuration
VendorsParameter ID Meaning GUI Value Range Unit Defulte L21 E18 T23 L21 E18 T23 Command
Cell reference signal
212(21.23 182(18.2d 212(21.23 242(24.2dB MOD PDSCHCFG: LocalCellId=0,
ReferenceSignalPwr power of each physical -600~500 0.1dBm None
dBm) Bm) dBm) m) ReferenceSignalPwr=212;
antenna
Switch for adjusting the
MOD CELLDLPCPDSCHPA: LocalCellId=0,
PdschPaAdjSwitch PA through power OFF(Off), ON(On) None OFF OFF OFF ON ON
PdschPaAdjSwitch=ON, PaPcOff=DB_6_P_A;
control on the PDSCH
Energy Per Resource
MOD PDSCHCFG: LocalCellId=0,
Pb Element (EPRE) on the 0~3 None None 1 1 3 3
Huawei ReferenceSignalPwr=212; Pb=3;
PDSCH
DB_6_P_A(-6 dB),
DB_4DOT77_P_A(-4.77 dB),
PA to be used when PA DB_3_P_A(-3 dB),
DB_3_P_ DB_3_P_A( DB_6_P_A DB_6_P_A(- MOD CELLDLPCPDSCHPA: LocalCellId=0,
PaPcOff adjustment for PDSCH DB_1DOT77_P_A(-1.77 dB), dB None
A(-3 dB) -3 dB) (-6 dB) 6 dB) PdschPaAdjSwitch=ON, PaPcOff=DB_6_P_A;
power control DB0_P_A(0 dB), DB1_P_A(1
dB), DB2_P_A(2 dB),
DB3_P_A(3 dB)
Cell reference signal
0 { -300, -200, -100, 0, 177, [SectorEquipmentFunction]configuredOutput
crsGain power of each physical 0.01dB 0(0dB) 0(0dB) 0(0dB) 0(0dB) 600(3dB) 600(3dB) 600(3dB)
300, 477, 600 } Unit: 0.01dB Power[EUtranCellFDD] crsGain 600 (6 dB)
antenna
Ericsson
Energy Per Resource
0 { 0, 1, 2, 3 } define the gains
pdschTypeBgain Element (EPRE) on the None None 0 0 0 3 3 3 [EUtranCellFDD/TDD] pdschTypeBgain 3
(5/4,1,3/4,1/2)
PDSCH
LNCEL: -3dB (700), 0dB(1000),
Cell reference signal
1.77dB (1177), 3dB(1300), 3dB(1300 3dB(1300
dlRsBoost power of each physical dB None - 6dB(1600) - 6dB(1600) [LNCEL] pMax[LNCEL] dlRsBoost 1600(6 dB)
4.77dB (1477),6dB, (1600); ) )
antenna
Nokia 0dB
Energy Per Resource
[LNCEL] pMax[LNCEL] allowPbIndexZero 1
allowPbIndexZero Element (EPRE) on the 0 (false), 1 (true) None 0 (false) 0 (false) 0 (false) 1 1 1 1
(true)
PDSCH
Nokia set to 1 (Hard code)
Microsoft Excel
Worksheet
5. How to CRS gain configuration 3 Vendors (Huawei, BKK0009-L21> get . crsgain
Ericsson, Nokia)
MO Atribute Value
==========================================
477,60 EUtranCellFDD=L21-BKK0009-1A
EUtranCellFDD=L21-BKK0009-1B
crsGain
crsGain
0
300
LST CELLDLPCPDSCHPA:;
KBI0106-UL
EUtranCellFDD=L21-BKK0009-1C
EUtranCellFDD=L21-BKK0009-1D
crsGain
crsGain
0
0 0
List Pa parameters for PDSCH power control ==========================================
i
------------------------------------------ BKK0009-L21> get . pdschtypeb
Local cell ID PA adjusting switch PA for even power distribution(dB) MO Atribute Value
e
==========================================
1 Off -3 dB EUtranCellFDD=L21-BKK0009-1A pdschTypeBGain 0
ON -4.77,-6
w
EUtranCellFDD=L21-BKK0009-1B pdschTypeBGain 1
1,2,3
2 Off -3 dB
3 Off -3 dB EUtranCellFDD=L21-BKK0009-1C pdschTypeBGain 0
a
LST PDSCHCFG:; EUtranCellFDD=L21-BKK0009-1D pdschTypeBGain 0
KBI0106-UL ==========================================
u n
+++ KBI0106-UL 2018-01-22 14:49:22 BKK0009-E18> get . crsgain
Display PDSCHCfg MO Atribute Value
o
---------------- ===========================================
H
Local cell ID Reference signal power(0.1dBm) PB Reference Signal Power Margin(0.1dB) Offset of Ant0 to Tx Power(0.1dB) Offset of Ant1 to Tx Power(0.1dB) Offset of Ant2 to Tx Power(0.1dB) EUtranCellFDD=E18-BKK0009-1A crsGain 0 477,60
s
Offset of Ant3 to Tx Power(0.1dB) EUtranCellFDD=E18-BKK0009-1B crsGain 0
0
s
EUtranCellFDD=E18-BKK0009-1C crsGain 0
1 212 1 0 255 255 255 255 EUtranCellFDD=E18-BKK0009-1D crsGain 0
200-600 2,3
ic
2 212 1 0 255 255 255 255 ============================================
3 212 1 0 255 255 255 255 BKK0009-E18> get . pdschtype
r
(Number of results = 3) MO Atribute Value
--- END ============================================
E
EUtranCellFDD=E18-BKK0009-1A pdschTypeBGain 0
A
EUtranCellTDD=L23-BKK0024-1A crsGain 0
I
EUtranCellTDD=L23-BKK0024-1B crsGain 0
SiteName CellName MO pMax dlRsBoost allowPbIndexRatio EUtranCellTDD=L23-BKK0024-1C crsGain 0 477,60
K
L23-CMI0003 L23-CMI0003-1A PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-11 430 (43dBm) 1300 (3dB) 0 (false) EUtranCellTDD=L23-BKK0024-2A crsGain 0
L23-CMI0003
L23-CMI0003
L23-CMI0003-1B
L23-CMI0003-1C
PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-21
PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-31
430 (43dBm)
430 (43dBm)
1300 (3dB)
1300 (3dB)
0 (false)
0 (false)
EUtranCellTDD=L23-BKK0024-2B
EUtranCellTDD=L23-BKK0024-2C
crsGain
crsGain
0
0
0
O
L23-CMI0003 L23-CMI0003-2A PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-12 400 (40dBm) 1300 (3dB) 0 (false) EUtranCellTDD=L23-BKK0024-3A crsGain 0
L23-CMI0003 L23-CMI0003-2B PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-22 400 (40dBm) 1300 (3dB) 0 (false) EUtranCellTDD=L23-BKK0024-3B crsGain 0
N
L23-CMI0003 L23-CMI0003-2C PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-32 400 (40dBm) 1300 (3dB) 0 (false) EUtranCellTDD=L23-BKK0024-3C crsGain 0
L23-CMI0003
L23-CMI0003
L23-CMI0003-3A
L23-CMI0003-3B
PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-13
PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-23
400 (40dBm)
400 (40dBm) 1477
1300 (3dB)
1300 (3dB)
0 (false)
0 (false)
1 BKK0024-L23> get . pdschtyp
MO Atribute Value
,1600
L23-CMI0003 L23-CMI0003-3C PLMN-PLMN/MRBTS-400102/LNBTS-400102/LNCEL-33 400 (40dBm) 1300 (3dB) 0 (false)
=========================================================
EUtranCellTDD=L23-BKK0024-1A pdschTypeBGain 0
EUtranCellTDD=L23-BKK0024-1B pdschTypeBGain 0
EUtranCellTDD=L23-BKK0024-1C pdschTypeBGain 0
7. RAN Recommendations with PB value LTE Live Network
1. CRS gain configuration should be separate area coverage ,deep indoor or capacity area
RE
12REs
/1PRB Without Reference Signal
1.RSRP=N/A (since there is NO RS)
2Ttoal Power PDSCH
=p(25)+p(26)+p(27)+p(28)+p(29)+p(30)+p(31)+p(32)+p(33)+p(34)+p(35)+p(36)
=EPRE PDSCHx12 (In linear Scale)
3.Total Power PDSCH all Channel
=Total Power PDSCH
4.Total Power of PDSCH (Without Reference Signal)
= EPRE for PDSCH x Number of RB x 12 (assuming for the symbol with no Reference
Signal)
= EPRE for PDSCH + 10 Log(Number of RB x 12)
1. RE(Resource Element)
'= Engergy (Power) allocated to 1 RE is calleds EPRE(Energy Per 1Resource Element)
2. RSRP =If there is no noise at all, RSRP would be same as EPRE you set for Reference Signal
'= RE for reference Signal Average Power of all the RS(Reference Signal within a Symbol)
3. Total Power PDSCH This value may vary with different symbols
-Symbol 0 in first slot is made up of multiple component - PCFICH, HICH, RS.
-Symbol 4 is made up of PDSCH and Reference signal).
How to calculate and
Example
find the Total Power of PDSCH become
If Network allocated at -90 dBm/EPRE for PDSCH and allocated 100 RBs for the PDSCH(BW:20MHz),
Find the Total Power of PDSCH become as follows.
Total Power of PDSCH (in dB/dBm scale )
= EPRE for PDSCH + 10 Log(Number of RB x 12)
@ -90dBm = -90 + 10 Log(100 x 12)
= -90 + 30.8
= - 59.2 dBm
If allocated at -95 dBm Find the Total Power of PDSCH become as follows.
= -95 + 10 Log(100 x 12)
@ -95dBm = -95 + 30.8
= -64.2 dBm
If allocated at -100 dBm Find the Total Power of PDSCH become as follows.
= -100 + 10 Log(100 x 12)
@ -100dBm = -100 + 30.8
= -69.2 dBm
If allocated at -105 dBm Find the Total Power of PDSCH become as follows.
@ -105dBm = -105 + 10 Log(100 x 12)
= -105 + 30.8
= -74.2 dBm
If allocated at -110 dBm Find the Total Power of PDSCH become as follows.
@ -110dBm = -110 + 10 Log(100 x 12)
= -110 + 30.8
= -79.2 dBm RSRP =If there is no noise at all, RSRP would be same as EPRE you set for
Reference Signal
1.25MIMO Microsoft Excel
1MIMO Worksheet
0.75MIMO
0.5MIMO
‘@BW=5MHz ‘@25PRB ‘@RRU43dBm(20Wat) MIMO
PB level P_PDSCH_B
Power RS ref powerP_PDSCH_B = P_PDSCH_A * ρA/ ρB 0 19.04 dBm 3.81
Power RS ref powerP_PDSCH_B = P_PDSCH_A * ρA/ ρB 1 15.23 dBm 3.81
Power RS ref powerP_PDSCH_B = P_PDSCH_A * ρA/ ρB 2 11.42 dBm 3.81
power RS ref powerP_PDSCH_B = P_PDSCH_A * ρA/ ρB 3 7.61 dBm 3.81
Power With out RS
P_PDSCH_A = EPRE_0 - mimoComp P_PDSCH_A = EPRE_0 - mimoComp
power 15.23
PSD =(pMax)-10*LOG10(PRBs_DL*12),@pmax=39.9dBm
RS Power = PSD - PA
PDSCH Type B =PSD +10*LOG10(PB)
RS= RRU_single port(dBm)-10log(PRB*12)+10Log(Pb+1)
EPRE_0 = 15.23 dBm
When •PSD_CELL_RS = PSD_0_SISO + dlRsBoost (for 1Tx),
•PSD_CELL_RS = PSD_MIMO + dlRsBoost (for 2Tx)
• where PSD_0 = (pMax – CELL_PWR_RED) –
10log10(#PRBs_DL x 12)
• and PSD_MIMO = PSD_0 – MIMO_COMP
EPRE_0 = (pmax – dlCellPwrRed)-10log (#PRB * 12);
@pmax=39.9dBm