Power Headroom Reporting Type Indication for LTE-A Terminals

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Solution Overview

Problem

In the LTE-A system, measuring and reporting power headroom becomes complex due to carrier aggregation, leading to confusion about the type of reported power headroom, which affects resource scheduling and link adaptation.

Innovation Solution

A method for a terminal to measure and report power headroom on subframes and component carrier groups, indicating the type of power headroom during reporting to distinguish between PUSCH and PUCCH transmissions, ensuring accurate resource allocation and scheduling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If carrier aggregation is used in LTE-A system, then system capacity and bandwidth are improved, but power headroom measurement and reporting becomes complex and confusing

Engineering Contradiction:

Improvesystem capacityVSAvoidpower headroom measurement complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the power headroom reporting by introducing type indicators (Type 1 for PUSCH, Type 2 for PUCCH) to distinguish different uplink channel power headroom values. This segmentation allows the base station to clearly identify which uplink channel the power headroom corresponds to, resolving the confusion caused by carrier aggregation while maintaining high system capacity.

Inventive Principle:

Principle #1Segmentation

2Quantity of substance

If power headroom reporting is implemented without type indication, then reporting overhead is reduced, but base station cannot accurately determine the type of power headroom for proper resource scheduling

Engineering Contradiction:

Improvereporting overheadVSAvoidpower headroom type information

Core Design Contradiction:

Quantity of substanceVSLoss of information

Solution Approach 1:

The patent introduces a type indicator as an intermediary element in the power headroom reporting mechanism. This indicator acts as a mediator that connects the power headroom value to its corresponding uplink channel type (PUSCH or PUCCH), enabling the base station to correctly interpret the power headroom information without significantly increasing reporting overhead.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If power headroom measurement is performed for both PUSCH and PUCCH, then comprehensive power information is obtained, but confusion arises about which power headroom type is being reported

Engineering Contradiction:

Improvepower information completenessVSAvoidpower headroom type identification

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent uses type indicators as distinctive markers (analogous to color coding) to differentiate between PUSCH and PUCCH power headroom measurements. Type 1 indicator identifies PUSCH power headroom, while Type 2 indicator identifies PUCCH power headroom, making it easy for the base station to identify and process the correct power headroom type without confusion.

Inventive Principle:

Principle #32Color changes

Data Source

PatentEP2536198B1Power headroom processing method and terminal

Publication Date: 2015.10.21 ZTE CORP

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AI summary

The invention discloses a method for processing power headroom and a terminal thereof, wherein the method comprises: when transmitting a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH) on subframe i and component carrier group j, the terminal measures power headroom on the subframe i and the component carrier group j; the terminal reports the power headroom to the base station and indicates the type of the reported power headroom when reporting. The invention specifically indicates the type to which the power headroom belongs by reporting the type while reporting the power headroom, thereby avoiding confusion.