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Method for measuring power headroom, method for reporting power headroom and terminal

A technology of power headroom and measurement method, which is applied in the field of reporting method and terminal, power headroom measurement, and can solve the problem that PUSCH and PUCCH cannot be sent at the same time

Active Publication Date: 2014-12-31
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] It should be noted that in the LTE system, in order to maintain the single-carrier characteristics of the uplink signal, PUSCH and PUCCH cannot be sent at the same time for the same UE

Method used

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  • Method for measuring power headroom, method for reporting power headroom and terminal
  • Method for measuring power headroom, method for reporting power headroom and terminal
  • Method for measuring power headroom, method for reporting power headroom and terminal

Examples

Experimental program
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Effect test

Embodiment 1

[0267] Suppose an LTE-A system works in Frequency Division Duplex (FDD) mode, and there are two downlink component carriers D1 and D2 and two uplink component carriers U1 and U2 in the system. Wherein, U1 and D1 are located in the same frequency band, and U2 and D2 are located in another frequency band.

[0268] A user terminal supports sending uplink signals on U1 and U2.

[0269] The UE measures power headroom on the component carriers U1 and U2 respectively.

[0270] Assuming that a user terminal transmits PUSCH on component carrier U1 in subframe i, the user terminal measures power headroom PH(i, 1) on component carrier U1 in subframe i.

[0271] Assume that the transmit power of the PUSCH on the component carrier U1 estimated by the user terminal in subframe i is P′ PUSCH (i, 1), and the maximum transmission power configured by the user terminal on the component carrier U1 is P CMAX (1), then the power headroom of the user terminal on the component carrier U1 in subfra...

Embodiment 2

[0299] Suppose an LTE-A system works in FDD mode, there are four downlink component carriers D1, D2, D3 and D4, and four uplink component carriers U1, U2, U3 and U4 in the system. Among them, U1, U2, D1, and D2 are located in the same frequency band, U3 and D3 are located in another frequency band, and U4 and D4 are located in the third frequency band.

[0300] A user terminal supports sending uplink signals on U1, U2, U3 and U4. Then U1 and U2 are a component carrier group (component carrier group 0), and U3 and U4 are each a component carrier group (component carrier group 1 and component carrier group 2).

[0301] The user terminal measures the power headroom on the component carrier group, that is, measures the power headroom on the component carriers U1 and U2 together, and measures the power headroom on the component carriers U3 and U4 respectively.

[0302] Assuming that a user terminal transmits PUSCH on component carrier U1 in subframe i, the user terminal measures p...

Embodiment 3

[0342] Suppose an LTE-A system works in TDD mode, and there are five component carriers C0, C1, C2, C3 and C4 in the system. Wherein, C0 and C1 are located in the same frequency band, C2 is located in another frequency band, and C3 and C4 are located in the third frequency band.

[0343] A user terminal supports sending uplink signals on C0, C1, C2, C3, and C4.

[0344] The user terminal measures the power headroom on the component carriers C0, C1, C2, C3 and C4 respectively.

[0345] Suppose a user terminal is in subframe i, component carrier C k Send PUSCH on , the user terminal is in subframe i, component carrier C k Upper measurement power headroom PH(i,k), k=0,1,2,3,4.

[0346] Assuming that the user terminal estimates that in subframe i, component carrier C k The transmit power of the PUSCH on is P′ PUSCH (i, k), and the user terminal is on the component carrier C k The maximum transmit power configured above is P CMAX (k), then the user terminal is in subframe i,...

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Abstract

A method for measuring power headroom includes: when a user terminal transmits uplink physical channels on the subframe i, the component carrier group j, the user terminal measures the power headroom on the subframe i, the component carrier group j; wherein, the uplink physical channel is a Physical Uplink Shared CHannel (PUSCH) and / or a Physical Uplink Control CHannel (PUCCH), and the component carrier group j includes one or more component carriers. A method for reporting power headroom includes: the user terminal reports the power headroom to a base station, and indicates the component carrier or the component carrier group to which the reported power headroom belongs. The present invention also provides a terminal. The present invention enhances the timeliness for reporting the power headroom.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method for measuring and reporting power headroom and a terminal. Background technique [0002] In the 3GPP LTE (The 3rd Generation Partnership Project Long Term Evolution, 3rd Generation Partnership Project Long Term Evolution) system, uplink power control (uplink power control, referred to as uplink power control or power control) is used to control the uplink physical channel (uplink physical channel) to compensate for path loss and shadowing of the channel, and to suppress inter-cell interference. Wherein, the uplink physical channels controlled by the uplink power control include a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH), a physical uplink control channel (Physical Uplink Control Channel, PUCCH) and a measurement reference signal (Sounding Reference Signal, SRS). LTE uplink power control adopts a control method combining open loop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/10H04W52/36
CPCH04W24/10
Inventor 朱鹏郝鹏喻斌王瑜新
Owner ZTE CORP
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