8.6 Uplink Power Control for 3.84 Mcps TDD Option
25.1023GPPRelease 17TSUser Equipment (UE) radio transmission and reception (TDD)
Power control in the uplink is the ability of the UE to converge to the required link quality set by the network while using minimum uplink power.
8.6.1 Test Conditions
During period T1, the PCCPCH and a second Beacon Channel are transmitted in the DL in designated slots within each frame and at the same power level.
The UE transmits, using the channel of TS25.105, Annex A.2.1 UL reference measurement channel (12.2 kbps) in one UL slot. For different parts of the test, different UL slots will be designated.
The values of table 8.14, period T1 shall be selected. Then, with the received PCCPCH and Beacon power set at -60 dBm, the value of DPCH constant value shall be adjusted so that the mean UE output power is 5 dBm. These conditions are held steady during period T1.
Periods T1 and T2 are each 5 seconds long.
Table 8.14: UL Power Control Test Conditions
|
Period T1 |
Period T2 |
||
|
IBTS all slots |
dBm |
-60 |
|
|
PCCPCH Power -Broadcast |
dBm |
18 |
|
|
PCCPCH power – Received |
dBm |
-60 |
-70 |
|
Mean UE transmit power |
dBm |
5 |
According to tables 8.15 and 8.16 |
|
SIRTARGET |
dB |
6 |
|
|
Ioc in PCCPCH and Beacon Slots |
dBm |
-60 |
|
|
IE (information element) Alpha |
As defined in 25.331 |
1.0 |
|
|
PCCPCH slot position |
Integer 0 -14 |
0 |
|
|
Beacon slot position |
Integer 0-14 |
8 |
|
Figure 8.1
8.6.2 Performance
At the end of period T1, the PCCPCH and Beacon Received power shall be simultaneously decreased by 10 dB. These conditions are summarized in table 8.14, period T2.
For the first frame including the change in received power the UE output power shall satisfy the values in table 8.15.
For the 20th frame after the change in received power the UE output power shall satisfy the values in table 8.16.
Table 8.15: Required UE Output Power, Frame Containing Power Level Change
|
Parameter |
Units |
Value |
|
|
UL transmission slot position |
1,9 |
7,14 |
|
|
UE output power |
dBm |
15 ±4.0 |
5 ±0.5 |
Table 8.16: Required UE Output Power, 20 Frames after Power Level Change
|
Parameter |
Units |
Value |
|
|
UL transmission slot position |
1,9 |
7,14 |
|
|
UE output power |
dBm |
15 ±4.0 |
15 ±4.0 |