PUCCH Resource Configuration for HARQ-ACK Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing PUCCH resources for HARQ-ACK signal transmissions, particularly in scenarios involving EPDCCHs, leading to resource collisions and increased overhead, especially when spatial multiplexing and antenna diversity are employed.
Innovation Solution
The solution involves configuring separate PUCCH resources for HARQ-ACK signal transmissions associated with PDCCHs, distributed EPDCCHs, and localized EPDCCHs, using explicit offsets and adaptive antenna diversity, and incorporating a HARQ-ACK Resource Offset (HPRO) field in DCI formats to avoid collisions and minimize overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PUCCH resources are configured for PDCCH, distributed EPDCCH, and localized EPDCCH, then resource collisions are avoided and transmission reliability is improved, but device complexity and resource overhead increase
Solution Approach 1:
The patent segments PUCCH resources into separate configurations for different control channel types (PDCCH, distributed EPDCCH, localized EPDCCH). Each control channel type has its own dedicated PUCCH resource set, preventing resource collisions and ensuring reliable HARQ-ACK transmission regardless of which control channel type is used.
Solution Approach 2:
The patent introduces a new dimension of resource separation by associating PUCCH resources with specific control channel types rather than using a unified resource pool. This dimensional separation in the resource allocation space eliminates collisions while maintaining manageable complexity through structured configuration.
2Productivity
If explicit offsets and adaptive antenna diversity are used for PUCCH resource configuration, then spectral efficiency is improved and overhead is reduced, but device complexity increases
Solution Approach 1:
The patent employs explicit offset parameters and adaptive antenna diversity parameters to configure PUCCH resources. By changing and optimizing these parameters based on channel conditions and control channel type, the system achieves higher spectral efficiency while keeping the configuration manageable through parameter-based control rather than structural complexity.
3Quantity of substance
If PUCCH resources are shared across multiple control channel types, then resource overhead is reduced, but resource collisions occur and transmission reliability deteriorates
Solution Approach 1:
The patent segments the PUCCH resource space into separate allocations for different control channel types. This segmentation prevents resource collisions that would occur with shared resources, ensuring that each control channel type has dedicated resources for reliable HARQ-ACK transmission.
Solution Approach 2:
The patent resolves the conflict between resource overhead and reliability by introducing a new dimension of control channel type association. Resources are allocated in this additional dimension, allowing the system to maintain lower overhead through efficient allocation while avoiding collisions through dimensional separation.
Data Source
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AI summary
Methods and apparatus are described for a User Equipment (UE) to transmit and for a base station to receive a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) signal in a resource of a Physical Uplink Control CHannel (PUCCH). The HARQ-ACK signal is transmitted from the UE in response to a detection of a PDCCH transmitted from the base station and conveying a DCI format that, depending on the PDCCH type, can include a HARQ-ACK PUCCH Resource Offset (HPRO) information field. The UE and the NodeB determine the PUCCH resource depending on the PDCCH type and, if the DCI format includes the HPRO, also depending on a PDCCH transmission type.