UCI Multiplexing on PUSCH with Dynamic HARQ-ACK Resource Reservation
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Solution Overview
Problem
In 5G New Radio (NR) wireless communication systems, there is a challenge in implementing the multiplexing of Uplink Control Information (UCI) on the Physical Uplink Shared Channel (PUSCH) effectively, particularly in supporting the transmission of two codewords, which affects the resource allocation and performance of UCI and Hybrid Automatic Repeat Request (HARQ) feedback.
Innovation Solution
A method is introduced where a first signaling determines parameters for two Transport Blocks (TBs), including MCS-related parameters or the number of transmission layers, to schedule a PUSCH carrying a target coded bit group. This method optimizes the allocation of resources by using a reserved resource pool for HARQ-ACK transmission, depending on the number of HARQ-ACK bits, thereby improving UCI and HARQ-ACK feedback performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reserved resource pool is established for HARQ-ACK transmission, then the reliability of HARQ-ACK feedback is improved, but the resource allocation flexibility deteriorates
Solution Approach 1:
The patent applies dynamics by making the reserved resource pool configuration conditional rather than fixed. The network device dynamically determines whether to establish the reserved resource pool based on the number of HARQ-ACK bits, allowing the system to adapt between reliable reserved resources and flexible dynamic allocation depending on actual feedback requirements
Solution Approach 2:
The patent changes the parameter of resource reservation status from a fixed state to a variable state controlled by the HARQ-ACK bit count. When the number of HARQ-ACK bits exceeds a threshold, the reserved resource pool is established; otherwise, it is not established, allowing optimal parameter configuration based on actual needs
2Reliability
If the reserved resource pool is established for all PUSCH transmissions, then the performance of UCI feedback is improved, but the resource waste increases
Solution Approach 1:
The patent applies partial action by establishing the reserved resource pool only when necessary (when HARQ-ACK bits exceed the threshold). This avoids the excessive action of always establishing the reserved pool, thereby reducing resource waste while maintaining UCI feedback performance when needed
Solution Approach 2:
The system changes the parameter of reserved resource pool establishment based on the HARQ-ACK bit count, transitioning between two states: established (when bits > threshold) and not established (when bits ≤ threshold). This parameter-based control optimizes the balance between feedback performance and resource efficiency
3Device complexity
If the first parameter is always used to determine the first reserved resource pool, then the complexity of resource management is reduced, but the resource allocation precision deteriorates
Solution Approach 1:
The patent introduces dynamics into the resource management process by making the use of the first parameter conditional. The first parameter is used to determine the reserved resource pool only when the number of HARQ-ACK bits exceeds the threshold, otherwise a different determination method is used, optimizing both complexity and precision based on actual conditions
Data Source
AI summary
A first receiver receives a first signaling, the first signaling is used to determine a first parameter and a second parameter, the first parameter and the second parameter are respectively for two TBs, the first parameter is one of MCS-related parameters or a number of transmission layer(s), and the second parameter is one of MCS-related parameters or a number of transmission layer(s); a first transmitter transmits a first PUSCH, the first PUSCH carries a target coded bit group; herein, a first UCI coded bit sequence comprises coded bits for UCI, and a length of the first UCI coded bit sequence depends on the second parameter, the target coded bit group depends on the first UCI coded bit sequence, and at least one of the target coded bit group or the first UCI coded bit sequence depends on a target HARQ-ACK bit block.