LTE Radio Parameters RL60 - Power Control-NokiaDeskripsi lengkap
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LTE Technology
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Home > Project Properties > Calculations > LTE Technology
SET LTE TECHNOLOGY PROPERTIES With the LTE technology, several power downlink settings need to be defined for the corresponding LTE signals. These signals are: Reference Signal (RS): This signal is similar to pilot signal in CDMA technology. It is always transmitted by LTE eNodeB, and is used by mobile to rank different LTE sectors according to signal strength. Physical Broadcast Channel (PBCH): This signal transmits a limited number of the most frequently transmitted parameters essential for initial access to the cell. Synchronization Signal (SS): Primary (P-SS) and Secondary (S-SS) synchronization signals enable Synchronization time and frequency synchronization between eNodeB and UE. Physical Downlink Control Channel (PDCCH): This signal carries information about UE resource assignment and other control information. Physical Downlink Shared Channel (PDSCH): This signal is the main data bearing downlink channel in LTE. It is shared among all users, but it also carries paging messages as well as some broadcast system information not carried on PBCH signal.
1.
In the Project Properties, click Calculations > LTE technology. technology.
2.
Set the value values s for LTE trans transmit mit power setti settings. ngs. Tx_RE_dlrs: Transmit power per resource element for downlink reference signal (RS) given in dBm. (Default is 0 dBm.) Tx_RE_Offset_pbch: Transmit power offset for physical broadcast channel (PBCH) relative to TX_RE_dlrs given in dB. (Default is 0 dB.) Tx_RE_Offset_ss: Transmit power offset for primary synchronization channel (P-SCH) and secondary synchronization channel (S-SCH) relative to Tx_RE_dlrs given in dB. (Default is 0 dB.) Tx_RE_Offset_pdcch: Transmit power offset for Physical Downlink Control Channel (PDCCH) relative to Tx_RE_dlrs. (Default is 0 dB.) Tx_RE_Offset_pdsch: Transmit power offset for P hysical Downlink Shared Channel (PDSCH) relative to Tx_RE_dlrs. (Default is 0 dB.) The above power settings are not independent of each other. The following sets of power checks must be satisfied otherwise a warning message is displayed, and transmit power levels will need to be re-entered. Click here for suggested power level values. Num. OFDM for PDCCH: Number (1, 2, 3) of OFDM symbols reserved for PDCCH in the first slot of the subframe. In the above example, Num. OFDM for PDCCH is set to 1. NOTE These settings can be redefined when you add a system using LTE technology.
3.
When the Apply these default values to all sources of all systems check mark is selected, all the power values in the existing systems are replaced with these values, and these values also become default values for future systems. When this check mark is cleared, these values become default values for future systems only; the existing
LTE Technology
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systems keep their values. 4.
Click OK to save and close the Project Properties.
SUGGESTED POWER LEVEL VALUES The following table lists suggested power level values under the assumption that all offsets are set to 0, and the N_odfm_pdcch is set to 1. From these examples, it is possible to compute Power per RE (Tx_RE_dlrs) levels for other maximum system power levels.
System (RF source) power maximum power set at 24 dBm CHANNEL BANDWIDTH
NUMBER OF SUBCARRIERS PE R RESOURCE BLOCK
TOTAL NUMBER OF SUBCARRIERS
TOTAL POWER
TOTAL POWER
[MHz]
NUMBER OF RESOURCE BLOCKS
POWER PER RE (Tx_RE_dlrs)
[mW]
[dBm]
5
25
12
300
250
24.0
-0.8
10
50
12
600
250
24.0
-3.8
15
75
12
900
250
24.0
-5.6
20
100
12
1200
250
24.0
-6.8
TOTAL NUMBER OF SUBCARRIERS
TOTAL POWER
TOTAL POWER
POWER PER RE (Tx_RE_dlrs)
[W ]
[dBm]
System (RF source) power maximum power set at 43 dBm CHANNEL BANDWIDTH
NUMBER OF SUBCARRIERS/
[MHz]
NUMBER OF RESOURCE BLOCKS
5
25
12
300
20
43.0
18.2
10
50
12
600
20
43.0
15.2
15
75
12
900
20
43.0
13.5
20
100
12
1200
20
43.0
12.2
TOTAL NUMBER OF SUBCARRIERS
TOTAL POWER
TOTAL POWER
POWER PER RE (Tx_RE_dlrs)
[W ]
[dBm]
RESOURCE BLOCK
System (RF source) power maximum power set at 46 dBm CHANNEL BANDWIDTH
NUMBER OF SUBCARRIERS/
[MHz]
NUMBER OF RESOURCE BLOCKS
5
25
12
300
40
46.0
21.2
10
50
12
600
40
46.0
18.2
RESOURCE BLOCK
LTE Technology
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15
75
12
900
40
46.0
16.5
20
100
12
1200
40
46.0
15.2
WHAT WOULD YOU LIKE TO DO? Set LTE Network Optimization Properties Create an LTE Output Map
