PUCCH Resource Mapping for Dynamic HARQ-ACK Feedback
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in resource allocation and collisions between resources assigned for legacy UEs and eIMTA UEs due to the use of a single reference UL-DL subframe configuration, leading to suboptimal HARQ timing and resource allocation in dynamically adapted systems.
Innovation Solution
A hybrid design combining both reference and dynamic UL-DL subframe configurations, where UEs determine HARQ ACK/NACK timing and resource allocation based on a reference configuration while adapting to dynamic changes, optimizing resource utilization and minimizing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reference UL-DL subframe configuration is used for resource allocation, then resource allocation is simplified, but resource allocation inefficiencies and collisions occur in dynamically adapted systems
Solution Approach 1:
The patent applies dynamics by enabling the system to switch between a reference UL-DL subframe configuration and a dynamic UL-DL subframe configuration. The reference configuration provides a stable baseline for resource allocation, while the dynamic configuration allows adaptation to changing traffic conditions. This dynamic switching mechanism resolves the contradiction by maintaining simplicity through the reference configuration while achieving efficiency through dynamic adaptation when needed.
2Device complexity
If a single reference UL-DL subframe configuration is used for resource allocation, then configuration management is simplified, but resource collisions between legacy UEs and eIMTA UEs occur
Solution Approach 1:
The patent segments the resource allocation into two distinct parts: resources allocated based on the reference UL-DL subframe configuration and resources allocated based on the dynamic UL-DL subframe configuration. This segmentation allows legacy UEs to operate with the reference configuration while eIMTA UEs can utilize the dynamic configuration, thereby preventing resource collisions between the two types of UEs while maintaining manageable complexity through the dual-configuration approach.
3Adaptability or versatility
If dynamic subframe configuration is implemented, then system adaptability improves, but HARQ timing determination becomes complex
Solution Approach 1:
The patent introduces the reference UL-DL subframe configuration as an intermediary between the dynamic configuration and the HARQ timing determination process. The reference configuration serves as a mediator that provides a stable framework for HARQ timing, while allowing dynamic adjustments through the dynamic configuration. This intermediary approach enables the system to maintain high adaptability while simplifying HARQ timing determination by anchoring it to the reference configuration.
Data Source
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AI summary
Aspects of the present disclosure relate to techniques that may help enable the determination of uplink resource allocation in systems that support dynamic uplink- downlink subframe configurations.An example method generally includes receiving signaling indicating a dynamic uplink-downlink (UL-DL) subframe configuration, determining hybrid automatic repeat request (HARQ) acknowledgment/negative acknowledgment (ACK/NACK) timing based on a reference UL-DL subframe configuration,and determining HARQ resource allocation based on the dynamic UL- DL subframe configuration.