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Uplink power control method and device

A technology of power control and power control parameters, which is applied in the communication field and can solve problems such as shortTTI uplink power control

Active Publication Date: 2020-12-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides an uplink power control method and device to at least solve the problem of short TTI uplink power control in the related art

Method used

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  • Uplink power control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] This embodiment provides a method for transmitting information.

[0089] For the existing LTE system, if the timing between the uplink grant and the PUSCH is modified, then the calculation formula of the PUSCH transmission power should be modified accordingly, that is, the definition of the closed-loop power control part should be modified accordingly. The formula of the PUSCH transmission power in the existing LTE is:

[0090]

[0091] Among them, P O_PUSCH (j), including P O_NOMINAL_PUSCH (j) and P O_UE_PUSCH (j), P O_NOMINAL_PUSCH (j) is the cell-specific power parameter of PUSCH, P O_UE_PUSCH (j) is the UE-specific power parameter of PUSCH, α c (j) is the path compensation coefficient of PUSCH.

[0092] For cumulative TPC commands, the power cumulative amount f on subframe i c (i)=f c (i-1)+δ PUSCH,c (i-K PUSCH ), where δ PUSCH,c (i-K PUSCH ) is the power offset, if the subframe i-K PUSCH There is a TPC command, then δ PUSCH,c (i-K PUSCH) is the po...

Embodiment 2

[0109] This embodiment also provides a method for solving the problem in the first embodiment. In the method of this embodiment, for accumulating TPC commands, the two timings can be mutually accumulated, but the problem described in the first embodiment needs to be avoided.

[0110] In this method, the power adjustment amount f on subframe i c (i) is the power adjustment f on the subframe i-m c (i-m) and δ PUSCH,c (i-K PUSCH ) sum, namely f c (i)=f c (i-m)+δ PUSCH,c (i-K PUSCH ), subframe i-m is the closest subframe of ion frame i before subframe i that satisfies the following conditions: PUSCH is not sent or PUSCH is sent but its corresponding TPC command is before subframe i.

[0111] Alternatively, subframe i-m is the closest subframe of ion frame i before subframe i that satisfies the following condition: there is no corresponding TPC command or the corresponding TPC command is before subframe i.

[0112] UE can obtain subframe i-m, f according to one of the follo...

Embodiment 3

[0126] This embodiment provides a method for configuring parameters of power control.

[0127] In this embodiment, the UE supports TTIs of at least two lengths. The length of the TTI can be 1 ms TTI in the existing LTE system, or the TTI includes 2 symbols or 4 symbols or 7 symbols. The 2 The symbols or 4 symbols or 7 symbols may be physically contiguous or not. For example, when the TTI length is 2, the DMRS is sent on the first symbol of a subframe, and the uplink data is sent on the third symbol of the subframe. The method given in this embodiment can be used for PUSCH and PUCCH.

[0128] For the power calculation formula of PUSCH, for different TTI lengths, the eNB configures the same parameters for the UE. For example, the existing PUSCH calculation formula is:

[0129]

[0130] Among them, P O_PUSCH (j), including P O_NOMINAL_PUSCH (j) and P O_UE_PUSCH (j), P O_NOMINAL_PUSCH (j) is the cell-specific power parameter of PUSCH, P O_UE_PUSCH (j) is the UE-specific...

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Abstract

The present invention provides an uplink power control method and device. The method includes: when using one of multiple TTI lengths to transmit an uplink channel, or one of multiple timings to transmit an uplink channel, UE The side acquires power control parameters; and determines the transmit power of the uplink channel according to the power control parameters, where the uplink channel is PUSCH or PUCCH. In the present invention, by adopting the above steps, the problem of uplink power control using TTIs of various lengths in the related art is solved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to an uplink power control method and device. Background technique [0002] The rapid development of mobile Internet and Internet of Things has triggered the explosive growth of data traffic and the widespread rise of diversified and differentiated services. As a new generation of mobile communication technology, 5G will support higher speed (Gbps), massive links (1M / Km2), ultra-low latency (1ms), higher reliability, and 100-fold energy efficiency improvement compared with 4G. Support new demand changes. Among them, ultra-low latency, as a key indicator of 5G technology, directly affects the development of latency-limited services such as Internet of Vehicles, industrial automation, remote control, and smart grid. Currently, a series of standard research on 5G latency reduction is being gradually advanced. [0003] Transmission Time Interval (TTI) reduction is an important rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W52/18H04W52/24
CPCH04W52/146H04W52/18H04W52/242H04W52/38H04W52/221H04W52/365H04L1/0003H04L25/0226H04W52/42
Inventor 张雯夏树强石靖韩祥辉梁春丽张文峰
Owner ZTE CORP