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Power control method, terminal and network side equipment

A network-side device and power control technology, applied in power management, electrical components, error prevention/detection through diversity reception, etc., can solve the problem of low data retransmission success rate, inability to increase data retransmission power, and inability to obtain TPC commands and other issues to achieve the effect of improving the success rate of retransmission

Active Publication Date: 2021-05-07
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a power control method, a terminal, and a network-side device to solve the problem in the prior art that a terminal whose random access fails cannot obtain the TPC command sent by the network-side device through the PDCCH, and thus cannot improve data. Retransmission power, resulting in a low success rate of data retransmission

Method used

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  • Power control method, terminal and network side equipment
  • Power control method, terminal and network side equipment
  • Power control method, terminal and network side equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] Embodiment 1: power climbing step size.

[0158] Step 0: The network side device configures the power ramping configuration parameters sent by the terminal configuration data (for example, PUSCH), the "power ramping configuration parameters for data transmission" includes:

[0159] Power ramping step (that is, the power ramping value for each retransmission (such as PUSCH_POWER_RAMPING_STEP). For example, the power ramping step is 2dB.

[0160] Step 1.1: UE triggers the transmission of data (for example, PUSCH), and the power ramp value of the data transmission is calculated according to the number of transmissions. Such as:

[0161] PUSCH_POWER_RAMPING=(PUSCH_POWER_RAMPING_COUNTER–1)×PUSCH_POWER_RAMPING_STEP

[0162] in:

[0163] PUSCH_POWER_RAMPING: Power ramping value. The ramp power value is the ramp power value of the T+1th actual retransmission of the terminal, and T indicates the actual number of retransmissions, that is, the number of times the terminal actu...

Embodiment 2

[0173] Embodiment 2: Msg2 provides a power control command.

[0174] Step 1: UE triggers data (for example, PUSCH) transmission, for example, UE triggers Msg1 transmission of 2-step RACH.

[0175] Step 2: The UE receives a feedback message sent by the network side equipment, such as Msg2 of 2-step RACH. The feedback message indicates the power adjustment value (or called the power adjustment amount) when the terminal performs the next data transmission, such as the feedback The message may carry TPC commands including power adjustment values.

[0176] Step 3: When the UE transmits data next time (for example, Msg1 retransmission of 2-step RACH), it adjusts the power of data transmission according to the power adjustment amount in step 2. Calculated as follows:

[0177]

[0178] This formula is equivalent to the formula in the second way. For details, please refer to the description of the formula in the second way above, and will not be repeated here.

Embodiment 3

[0179] Embodiment 3: Choose one of Msg2 power control or terminal power ramping.

[0180] Step 0: Same as Step 0 in Example 1.

[0181] Step 1: The terminal triggers the transmission of data (for example, PUSCH), for example, triggers the transmission of Msg1 of the 2-step RACH.

[0182] Step 2:

[0183]If the terminal receives the power adjustment amount information sent by the network side equipment (such as the power adjustment command in Msg2 of 2-step RACH), the terminal uses the power adjustment method in Embodiment 2 to transmit the next data (such as, 2-stepRACH Msg1 retransmission) power is adjusted.

[0184] If the terminal does not receive the power adjustment amount information sent by the network side, the terminal uses the power adjustment method in Embodiment 1 to adjust the power of the next data transmission (eg, Msg1 retransmission of 2-step RACH).

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Abstract

The present invention provides a power control method, a terminal and a network side device. Wherein, the power control method applied to the terminal includes: acquiring a power control parameter; and controlling the retransmission power of the data part in the message 1 of the random access procedure according to the power control parameter. It can be seen that when the terminal retransmits the data part in message 1, it can adjust its retransmission power based on the obtained power control parameters, so as to improve the retransmission success rate of the data part in message 1.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to a power control method, a terminal, and a network side device. Background technique [0002] At present, the network side device sends a TPC (Transmit Power Control, transmission power control) command carrying power control information to the terminal through the PDCCH (Physical Downlink Control Channel, physical downlink control channel), so that the terminal Controls the retransmission power of data. [0003] In the prior art, if the terminal wants to obtain the TPC, it needs to decode the PDCCH to obtain it, and the decoding of the PDCCH requires the C-RNTI (Cell-Radio Network Temporary Identifier, Cell-Radio Network Temporary Identifier) ​​of the terminal to descramble. [0004] However, for a terminal whose random access is unsuccessful, the network side device does not allocate a C-RNTI, so the terminal cannot obtain the TPC command...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/48H04W52/54H04W74/08
CPCH04W52/48H04W52/54H04W74/0833H04L1/06H04W52/362H04W52/50
Inventor 吴昱民
Owner VIVO MOBILE COMM CO LTD
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