LTE-A Power Configuration for Overlapping Subframes
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Solution Overview
Problem
In LTE-A systems with dual connectivity, improper power allocation across multiple channels leads to insufficient power for important information, affecting transmission performance due to asynchronous base stations and overlapping uplink channels.
Innovation Solution
A power configuration method that allocates transmit power to subframes based on channel priorities and upper limits, ensuring that the power for subsequent subframes is adequately considered, thereby ensuring proper allocation to important information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is allocated to the first subframe j and second subframe i according to channel priorities, then transmission reliability of high-priority channels is improved, but power for the third subframe i+1 becomes insufficient
Solution Approach 1:
The patent performs preliminary power allocation by determining a power upper limit for the first subframe based on the power requirements of the third subframe before actual power distribution. This advance planning ensures that power reserved for subsequent high-priority transmissions is not depleted by current allocations, resolving the contradiction between maintaining transmission reliability now and preserving power for future transmissions.
2Ease of operation
If all portions of the first subframe j are transmitted at equal power, then transmission simplicity is improved, but transmission performance of overlapping channels deteriorates
Solution Approach 1:
The patent applies different power allocation strategies to different portions of the first subframe based on their overlap characteristics. For portions overlapping with the third subframe, a power upper limit is imposed to preserve power for the subsequent transmission. For non-overlapping portions, equal power allocation can be applied. This localized differentiation resolves the contradiction by maintaining simplicity where possible while ensuring performance where needed.
Data Source
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AI summary
This application provides a power configuration method, user equipment, and a base station, where the method includes: when the UE sends data to a first network side device over a first channel and to a second network side device over a second channel, determining that the first channel separately overlaps the second channel and a third channel, where an overlap exists between a first portion of a first subframe j in which the first channel is located and a second subframe i in which the second channel is located; an overlap exists between a second portion, other than the first portion, of the first subframe j and a first portion of a third subframe i+1 in which the third channel is located; and the third subframe i+1 is a next subframe of the second subframe i; and allocating, according to priorities of the first channel and the second channel, first transmit power to the first subframe j and second transmit power to the second subframe i, where the first transmit power is less than or equal to a first power upper limit, a sum of the first transmit power and the second transmit power is less than or equal to a first threshold, and a sum of third transmit power of the third subframe i+1 and the first power upper limit is less than or equal to a second threshold.