Multi-RNTI PUCCH Resource Selection for HARQ-ACK Multiplexing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently determining and multiplexing acknowledgment information and power for multicast acknowledgment transmissions, particularly in 5G/NR mobile communications, which are essential for supporting increased data traffic and diverse applications.
Innovation Solution
The method involves determining and multiplexing hybrid automatic repeat request acknowledgment (HARQ-ACK) information by using specific resources for PUCCH transmissions based on different radio network temporary identifiers (RNTIs), allowing separate handling of HARQ-ACK information for different sets of RNTIs, and transmitting this information using a unified resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate resources are allocated for HARQ-ACK information corresponding to different RNTIs, then the reliability of acknowledgment transmission is improved, but the device complexity and resource management overhead increase
Solution Approach 1:
The patent segments HARQ-ACK resources by associating them with specific RNTI types (first RNTI for unicast, second RNTI for multicast). The UE determines separate PUCCH resources for each RNTI type, allowing independent resource allocation and reducing interference between different acknowledgment streams while maintaining clear resource separation.
Solution Approach 2:
The patent enables a single PUCCH resource to serve multiple functions by allowing multiplexing of HARQ-ACK information from different RNTI types on the same resource. The UE multiplexes first HARQ-ACK information (from first RNTI) and second HARQ-ACK information (from second RNTI) onto a unified PUCCH resource, reducing overall resource consumption while maintaining reliability.
2Adaptability or versatility
If multiple separate PUCCH resources are maintained for different RNTI types, then the adaptability of the system is improved, but the loss of time for resource determination increases
Solution Approach 1:
The patent performs preliminary resource determination by maintaining separate PUCCH resource configurations for different RNTI types in advance. When HARQ-ACK information needs to be transmitted, the UE can immediately select the appropriate pre-configured resource based on the RNTI type without performing complex real-time resource allocation, thus reducing time loss.
Solution Approach 2:
The patent merges the resource determination process by establishing a unified mapping rule that links both first RNTI and second RNTI to their respective PUCCH resources through a common determination mechanism. This reduces the time required for resource selection while maintaining adaptability to different RNTI types.
3Reliability
If separate power management procedures are used for different HARQ-ACK transmissions, then the reliability of power control is improved, but the use of energy increases
Solution Approach 1:
The patent applies partial power management by allowing the UE to transmit only the necessary HARQ-ACK information on shared resources rather than maintaining full separate power control for all RNTI types. When multiple HARQ-ACK messages share the same PUCCH resource, the UE transmits a multiplexed version, reducing overall energy consumption while maintaining sufficient power control reliability for the combined transmission.
Data Source
AI summary
Methods and apparatuses for determining and multiplexing acknowledgment information. A method for operating a user equipment includes receiving: information for first resources for physical uplink control channel (PUCCH) transmissions to provide hybrid automatic repeat request acknowledgement (HARQ-ACK) information in response to semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) receptions associated with a first radio network temporary identifier (RNTI) from a first set of RNTIs, and information for second resources for PUCCH transmissions to provide HARQ-ACK information in response to SPS PDSCH receptions associated with a second RNTI from a second set of RNTIs. The method further includes determining a first resource from the first resources for a first PUCCH to provide only: first HARQ-ACK information in response to first SPS PDSCH receptions associated with the first RNTI, and second HARQ-ACK information in response to second SPS PDSCH receptions associated with the second RNTI; and transmitting the first PUCCH.