Base Station Uplink Control Information Multiplexing
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Solution Overview
Problem
In future radio communication systems like NR, the control of multiplexing uplink control information (UCI) on the Physical Uplink Shared Channel (PUSCH) is not fully studied, leading to potential deterioration in communication throughput and quality, especially in UL grant-based and grant-free transmissions.
Innovation Solution
A method is implemented where the base station controls the number of bits for the acknowledgement signal to be multiplexed on the PUSCH based on downlink control information, using rate-matching processing instead of puncturing, and dynamically configuring the codebook size of HARQ-ACK to optimize resource utilization and prevent communication degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiplexing of UCI on PUSCH is supported in UL grant-based and grant-free transmissions, then communication capacity and flexibility are improved, but communication throughput and quality may deteriorate due to insufficient control mechanisms
Solution Approach 1:
The patent applies parameter changes by dynamically controlling the codebook size of HARQ-ACK feedback and the number of bits for UCI multiplexing on PUSCH. The base station configures these parameters through downlink control information to optimize the balance between multiplexing capacity and communication reliability under different transmission conditions.
Solution Approach 2:
The patent implements dynamics by enabling flexible and dynamic control of UCI multiplexing parameters. The base station can adaptively adjust the codebook size and multiplexing configuration based on real-time channel conditions and transmission requirements, allowing the system to transition between different operating modes for grant-based and grant-free transmissions.
2Productivity
If codebook size of HARQ-ACK is dynamically configured, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring codebook size parameters through downlink control information before actual uplink transmission. This allows the terminal to prepare the appropriate HARQ-ACK feedback structure in advance, improving resource utilization while managing complexity through predetermined configurations rather than real-time calculations.
3Reliability
If rate-matching processing is used instead of puncturing for UCI multiplexing, then communication quality is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by performing rate-matching processing in advance during the uplink signal generation stage, before transmission. This ensures optimal communication quality by properly allocating resources for both data and control information, while managing complexity through systematic preprocessing rather than complex real-time adjustments during transmission.
Data Source
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AI summary
To prevent deterioration in communication throughput and so on also in a case that multiplexing of uplink control information on an uplink data channel is supported, one aspect of a base station according to the present disclosure includes a transmitting section that transmits downlink control information indicating UL transmission, and DL data, and a control section that controls scheduling such that the number of bits of a acknowledgement signal for the DL data, the acknowledgement signal being to be multiplexed on a first uplink shared channel that is transmitted based on the downlink control information and/or a second uplink shared channel that is transmitted independently of the downlink control information, is up to a given value.