PUCCH Power Selection Using Last-SLIV PDSCH
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Solution Overview
Problem
The existing wireless communication systems face challenges in managing uplink transmission and reception, particularly in determining the transmission power of a Physical Uplink Control Channel (PUCCH) with Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information when time domain bundling is configured, leading to instability in feedback.
Innovation Solution
A method and apparatus for determining the transmission power of PUCCH based on specific Physical Downlink Shared Channel (PDSCH) associated with the last SLIV (Start and Length Indicator value) in the time domain resource allocation, ensuring stable HARQ-ACK feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transmission power of PUCCH is determined without specific PDSCH association, then calculation is simpler, but HARQ-ACK feedback stability deteriorates
Solution Approach 1:
The patent introduces a specific PDSCH (associated with the last SLIV in the TDRA row) as an intermediary reference for determining PUCCH transmission power. This specific PDSCH acts as a mediator between the multiple PDSCHs and the PUCCH, providing a stable basis for power calculation that ensures HARQ-ACK feedback stability while maintaining calculation simplicity.
2Productivity
If multiple PDSCHs are received in time domain bundling, then data throughput increases, but determining which PDSCH to base PUCCH power on becomes complex
Solution Approach 1:
The patent applies local quality by identifying a specific PDSCH (the one associated with the last SLIV in the TDRA row) among multiple PDSCHs to serve as the reference for PUCCH transmission power determination. This approach allows the system to handle multiple PDSCHs for increased throughput while maintaining simple power determination by focusing on a specific local element rather than considering all PDSCHs equally.
3Speed
If PUCCH transmission power is not accurately determined, then transmission is faster, but uplink transmission performance deteriorates
Solution Approach 1:
The patent performs preliminary action by determining the PUCCH transmission power in advance based on the specific PDSCH (associated with the last SLIV) before actual PUCCH transmission. This preliminary power determination ensures that the transmission is performed with accurate power levels, improving uplink transmission performance while maintaining efficient transmission speed.
Data Source
AI summary
A method and apparatus for transmitting a PUCCH in a wireless communication system are disclosed. According to an embodiment of the present disclosure, the method includes receiving, from a base station, first configuration information related to time domain bundling, receiving, from the base station, at least one PDSCH in at least one PDSCH reception occasion, and transmitting, to the base station, a PUCCH including HARQ-ACK information for the at least one PDSCH, and transmission power for the PUCCH is based on a specific PDSCH among the at least one PDSCH, and the specific PDSCH is associated with a last SLIV among at least one SLIV included in a TDRA row indicated by DCI.