Wireless Data Transmission with Dynamic HARQ Ack/Nack Resource Mapping
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing and transmitting Hybrid Automatic Repeat Request (HARQ) Acknowledgment/Negative Acknowledgment (Ack/Nack) signals for downlink data, particularly when data is transmitted through different resources and configurations, leading to delays and inefficiencies.
Innovation Solution
A method for generating and transmitting Ack/Nack signals for downlink data using dynamic methods, where different resources are scheduled by distinct downlink control information (DCI) within a single slot, allowing separate generation and transmission of Ack/Nack for each data stream, facilitated by configuring control resource sets (CORESETs) and using downlink assignment indicators (DAI) to determine Ack/Nack values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink data is transmitted through different resources with different DCIs, then data transmission capacity and flexibility are improved, but Ack/Nack signal management complexity and transmission delay increase
Solution Approach 1:
The patent segments the Ack/Nack transmission by associating each DCI with a specific PUCCH resource, enabling independent transmission of Ack/Nack signals for different downlink data streams. This segmentation allows the system to manage multiple data transmissions simultaneously without signal interference, resolving the complexity issue while maintaining high transmission capacity.
Solution Approach 2:
The patent introduces a mapping relationship between DCIs and PUCCH resources as an intermediary mechanism. This mapping table or configuration serves as a mediator that guides the UE in selecting the correct PUCCH resource for each DCI, simplifying the Ack/Nack transmission process despite the increased number of data streams.
2Productivity
If multiple downlink data streams are transmitted simultaneously through different resources, then system throughput is improved, but Ack/Nack transmission delay and interference increase
Solution Approach 1:
By segmenting the Ack/Nack transmission into separate PUCCH resources for each DCI, the patent eliminates temporal and spatial interference between Ack/Nack signals of different data streams. This allows simultaneous transmission of multiple data streams without delay, as each Ack/Nack can be transmitted independently in its designated resource.
Solution Approach 2:
The patent transitions from a single-dimensional Ack/Nack transmission approach to a multi-dimensional approach by assigning different PUCCH resources (time, frequency, or code domain) to different DCIs. This dimensional expansion allows multiple Ack/Nack signals to be transmitted simultaneously without interference, maintaining system throughput while eliminating delay.
3Adaptability or versatility
If dynamic Ack/Nack generation method is used with multiple CORESETs, then adaptability to different transmission configurations is improved, but signal generation and processing complexity increase
Solution Approach 1:
The patent creates a universal mapping mechanism that works across multiple CORESETs and DCI types. The same PUCCH resource allocation principle applies regardless of which CORESET or DCI format is used, providing adaptability while avoiding the need for separate complex processing logic for each configuration type.
Solution Approach 2:
The patent utilizes parameter changes in the DCI (such as resource allocation indicators) to dynamically select the appropriate PUCCH resource. By changing parameters like time domain resource assignment or frequency domain allocation based on the DCI content, the system achieves adaptability to different transmission configurations through a unified processing approach.
Data Source
AI summary
The present specification relates to a method for a base station transmitting/receiving data in a wireless communication system. More specifically, a terminal receives, from the base station, configuration information for configuring a control resource set (CORESET). Then, on the basis of the configuration information, the terminal receives first downlink control information (DCI) and second DCI for generating an ACK/NACK using a dynamic method. The terminal receives, on a resource scheduled by the first DCI, a first physical downlink shared channel (PDSCH) and a second PDSCH, and transmits a first Ack/Nack for the first PDSCH and an Ack/Nack for the second PDSCH.