HARQ Timing Determination for UCI in 5G Wireless Systems

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Solution Overview

Problem

In 5G communication systems, the existing methods for transmitting uplink control information (UCI) face complexity in determining HARQ-ACK timing for dynamically scheduled PDSCH, SPS PDSCH, and PDCCH, which complicates efficient HARQ-ACK feedback.

Innovation Solution

A method that determines HARQ timing for dynamically scheduled PDSCH, SPS PDSCH, and PDCCH based on information sent from the base station, using higher layer signaling, DCI indications, or preset configurations, to simplify the transmission of HARQ-ACK information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate HARQ timing determination methods are used for dynamically scheduled PDSCH, SPS PDSCH, and PDCCH, then each channel can be optimized independently, but the overall system complexity increases and timing coordination becomes difficult

Engineering Contradiction:

Improvechannel optimization flexibilityVSAvoidHARQ timing determination complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the HARQ timing determination for dynamically scheduled PDSCH, SPS PDSCH, and PDCCH into a unified framework. The base station configures a common set of HARQ timing values that can be applied across different channel types, reducing the number of separate timing mechanisms while maintaining optimization capabilities for each channel type through selective application of the unified timing parameters.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal HARQ timing configuration mechanism where a single set of timing parameters configured by higher layer signaling can serve multiple channel types (dynamically scheduled PDSCH, SPS PDSCH, and PDCCH). This multi-functional approach allows the same timing determination framework to handle different channel types, reducing overall system complexity while maintaining adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If complex HARQ timing determination methods are used to achieve precise timing control, then timing accuracy improves, but the processing overhead and signaling complexity increase

Engineering Contradiction:

ImproveHARQ timing accuracyVSAvoidtiming determination processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the base station pre-configure HARQ timing values through higher layer signaling before actual data transmission occurs. These pre-configured timing values are stored and reused for multiple transmissions, eliminating the need for complex real-time timing calculations and reducing processing overhead while maintaining timing accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses parameter changes by allowing the network to configure specific HARQ timing values through higher layer signaling parameters. Instead of using complex algorithms to determine timing, the system changes the approach to using pre-defined timing parameters that can be easily configured and updated, simplifying the determination process while maintaining precision.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If unified HARQ timing configuration is used for all channels, then system complexity is reduced, but flexibility in optimizing individual channel performance is limited

Engineering Contradiction:

ImproveHARQ timing configuration simplicityVSAvoidindividual channel optimization capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent applies segmentation by dividing the unified HARQ timing configuration into channel-specific application rules. While the timing parameters are configured centrally, the system segments the application of these parameters across different channel types (dynamically scheduled PDSCH, SPS PDSCH, PDCCH), allowing each channel to be optimized independently based on its specific requirements while using the same underlying timing framework.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11101943B2Method and apparatus for transmitting UCI in wireless communication system

Publication Date: 2021.08.24 SAMSUNG ELECTRONICS CO LTD

AI summary

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure discloses a method of a user equipment (US) for transmitting uplink control information (UCI) in a wireless communication system. The method performed by the user equipment includes: determining a hybrid automatic retransmission request (HARQ) timing or HARQ timings of a dynamically scheduled physical downlink shared channel (PDSCH) and/or a semi-persistent scheduling (SPS) PDSCH and/or a physical downlink control channel (PDCCH) that indicates SPS releasing according to information sent from a base station; and transmitting generated hybrid automatic retransmission request acknowledgement (HARQ-ACK) information according to the HARQ timing or the HARQ timings determined. By applying present disclosure, it is possible to simplify the HARQ-ACK timing determination mode and can perform HARQ-ACK information transmission in time.