Uplink Transmission Power Allocation for 5G Signal Collision
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Solution Overview
Problem
In 5G communication systems, the short-duration physical uplink control channel (PUCCH) carrying only a scheduling request (SR) often collides with other uplink channels on the same time domain resource, leading to signal transmission issues due to the flexible configuration of SR periods and varying channel lengths.
Innovation Solution
A method where a terminal transmits a first uplink channel with a specific transmit power on a shared time domain resource, and a second uplink channel with a different transmit power on the same resource, ensuring the total power allocation meets the requirements of both channels, thereby resolving collisions and enabling simultaneous transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a short-duration PUCCH carrying only SR is transmitted flexibly on any symbol, then the SR transmission requirement with short delay is supported, but collision with another uplink channel on the same time domain resource occurs
Solution Approach 1:
The patent changes the power allocation parameters dynamically based on channel collision detection. When collision is detected, the terminal adjusts the transmit power of PUCCH and PUSCH according to predefined power allocation ratios, ensuring both channels can be transmitted simultaneously with reliable signal quality.
Solution Approach 2:
The patent introduces dynamic power adjustment mechanism where the terminal can flexibly change transmit power levels based on real-time collision detection results. This dynamic adaptation allows the system to handle varying collision scenarios while maintaining transmission reliability.
2Productivity
If SR and other uplink control information are jointly encoded and transmitted on long-duration PUCCH, then resource utilization is improved, but transmission requirement for short delay SR cannot be supported
Solution Approach 1:
The patent segments the uplink control information into separate channels: SR is transmitted on short-duration PUCCH while other uplink control information is transmitted on long-duration PUCCH or PUSCH. This segmentation allows SR to be transmitted with short delay while other information utilizes available resources efficiently.
Solution Approach 2:
The patent introduces a new dimension by creating short-duration PUCCH as a separate transmission channel from long-duration PUCCH. This dimensional separation in time domain (short vs long duration) enables different QoS requirements to be met simultaneously - SR gets fast transmission while other information uses longer duration for better resource utilization.
3Reliability
If multiple uplink channels are transmitted simultaneously on the same time domain resource, then transmission reliability is improved, but power allocation complexity increases
Solution Approach 1:
The patent implements self-service power allocation where the terminal autonomously determines power distribution between PUCCH and PUSCH based on predefined rules and collision detection results. The network side provides configuration parameters, and the terminal automatically adjusts power levels without requiring complex real-time negotiation or external control.
Data Source
AI summary
An uplink transmission method and a terminal applied to the field of communications technologies to resolve a signal transmission problem that arises when a short-duration physical uplink control channel carrying only a scheduling request (SR) collides with another uplink channel on a same time domain resource. The method includes transmitting a scheduling request on a first uplink channel using a first time domain resource a first transmit power, where the first uplink channel comprises a first time domain resource and transmitting information on a second uplink channel using a second transmit power, where the second uplink channel comprises the first time domain resource, and where the first time domain resource represents some or all time domain resources in the second uplink channel.