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Method and terminal for realizing power headroom reporting

A power headroom and terminal technology, applied in the field of communication, can solve problems such as the lack of a clear specific implementation, and achieve the effects of promoting wide application, improving system performance, and enhancing adaptability

Active Publication Date: 2010-12-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the case of multiple carriers, how to schedule the uplink transmission resources supporting PHR in multiple component carriers, and how to send the PH of each component carrier when the PHR is triggered on the component carriers, there is no clear specific implementation of this in the prior art

Method used

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  • Method and terminal for realizing power headroom reporting
  • Method and terminal for realizing power headroom reporting
  • Method and terminal for realizing power headroom reporting

Examples

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Effect test

specific example 1

[0068] The UE works on 4 component carriers, that is, the UE is assigned to 4 component carriers, which are respectively component carrier 0, component carrier 1, component carrier 2 and component carrier 3. The PHR is triggered on the component carrier 0, the component carrier 1, the component carrier 2 and the component carrier 3, and each component carrier has an uplink transmission resource supporting the PHR.

[0069] If the UE determines a PH for each allocated component carrier, that is, the PH corresponds to only one component carrier, then the determined PHs are: PH i =P max / 4-P i , where i takes values ​​0, 1, 2, 3; PH i is the PH determined for component carrier i; P max is the nominal maximum transmit power of the UE, which is equally distributed among the 4 component carriers, correspondingly, P max / 4 is the average nominal maximum transmit power of the UE on each component carrier; P i Estimated UL-SCH transmit power for UE on component carrier i. In addi...

specific example 2

[0074] The UE works on 4 component carriers, that is, the UE is assigned to 4 component carriers, which are respectively component carrier 0, component carrier 1, component carrier 2 and component carrier 3. PHR is triggered on component carrier 1, and PHR is not triggered on other component carriers.

[0075] At time t1, there are uplink transmission resources supporting PHR on component carrier 2 and component carrier 3. Since the UE only selects at least one component carrier for PHR transmission when there is an uplink transmission resource supporting PHR on the component carrier corresponding to PH, so , at this time, the component carrier will not be selected to transmit the PH corresponding to component carrier 1.

[0076] time t 2 , t 2 >t 1 , there is an uplink resource supporting PHR on component carrier 1, at this time, UE determines PH for component carrier 1, that is, PH 1 , select component carrier 1 to send the PH corresponding to component carrier 1, that i...

specific example 3

[0078] The UE works on 8 component carriers, that is, the UE is allocated to 8 component carriers, which are respectively component carrier 0 to component carrier 7 . PHR is triggered on component carrier 0, and PHR is not triggered on other component carriers.

[0079] At the current moment, there are only uplink transmission resources supporting PHR on component carrier 0. As long as there are uplink transmission resources supporting PHR on at least one component carrier, the UE will select at least one component carrier for PHR transmission. Therefore, at this time, UE Determine PH for component carrier 0, ie PH 0 , select component carrier 0 to send the PH corresponding to component carrier 0, that is, PH 0 , the format of the MAC CE in this example is as follows image 3 shown. Since there is no fixed correspondence between the component carrier that sends the PH and the component carrier corresponding to the PH, it is necessary to identify the component carrier corres...

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Abstract

The invention discloses a method and a terminal for realizing power headroom reporting (PHR). In the method, user equipment (UE) which supports carrier aggregation technology determines one or more power headrooms (PH) for distributed component carriers and selects at least one component carrier in an uplink for PHR transmission. According to the scheme provided by the invention, clear description for specific implementation of PHR under a multi-carrier condition is provided, the development of the carrier aggregation technology can be promoted by combining the PHR in the carrier aggregation technology, and the broad application of multi-carrier technology can be promoted. Due to the PHR supporting the multi-carrier condition, the UE can perform PHR transmission for each component carrier, so that an evolved node base (eNB) can know more information on each component carrier on the side of the UE, the eNB or even a core network can conveniently control the UE, and the system performance can be improved. In addition, flexible various implementation modes are provided in the scheme of the invention, and a proper choice can be made according to the actual application condition, so that the adaptability of the overall scheme is enhanced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and a terminal for realizing power headroom reporting. Background technique [0002] The Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) of the third-generation mobile communication Long Term Evolution (LTE, Long Term Evolution) system is composed of a base station (eNB), and its radio interface media access control The (MAC, MediaAccess Control) protocol layer has a power headroom reporting (PHR, Power Headroom Reporting) functional entity. [0003] PHR means that the user terminal (UE, User Equipment) reports the UE's nominal maximum transmit power and estimated uplink shared channel (UL-SCH, UpLink Share Channel) to the eNB in ​​the form of a media access control element (MAC CE, MAC Control Element). ) The difference between the transmit power. [0004] There are mainly the following situations that ...

Claims

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Application Information

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IPC IPC(8): H04W24/10
Inventor 王涛张健戴谦张银成
Owner ZTE CORP