5G NR Control Signal Segmentation for HARQ-ACK Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional 5G NR systems face challenges in flexibly supporting HARQ-ACK feedback delays, which limits the peak data rate for half-duplex terminals, as they cannot configure all necessary feedback situations effectively due to limited scheduling delay fields.
Innovation Solution
The system and method provide a mechanism for determining PDSCH scheduling delay and HARQ-ACK feedback delay by receiving control signals indicating combinations of these delays from a wireless communication node, allowing the UE to determine when to receive PDSCH and transmit corresponding HARQ-ACK feedback, using fields with varying bit lengths to indicate multiple possible delay values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional 5G NR systems use limited scheduling delay fields, then the system structure remains simple, but the flexibility in supporting HARQ-ACK feedback delays is reduced
Solution Approach 1:
The scheduling delay indication is divided into multiple separate fields: a first field indicating PDSCH scheduling delay and a second field indicating HARQ-ACK feedback delay. This segmentation allows independent configuration of each delay parameter, enabling flexible support for various HARQ-ACK feedback delay scenarios without requiring an excessively complex unified scheduling delay field.
Solution Approach 2:
The patent introduces a new dimension by adding a separate HARQ-ACK feedback delay field alongside the existing PDSCH scheduling delay field. This dimensional expansion transforms the single-parameter delay indication into a two-parameter system, enabling the network to independently control and optimize both the data scheduling delay and the acknowledgment feedback delay, thereby achieving greater flexibility in supporting diverse communication scenarios.
2Productivity
If the system configures all necessary feedback situations for half-duplex terminals, then peak data rate is supported, but the scheduling delay field requires more bits
Solution Approach 1:
By segmenting the delay indication into separate PDSCH scheduling delay and HARQ-ACK feedback delay fields, the system can efficiently cover all necessary feedback situations for half-duplex terminals. Each field uses an appropriate number of bits optimized for its specific purpose, avoiding the need for a single overly long field while ensuring comprehensive support for various feedback scenarios, thus maintaining peak data rate capability.
Solution Approach 2:
The patent changes the parameter structure by introducing distinct delay parameters for PDSCH scheduling and HARQ-ACK feedback. This parameter transformation allows the system to independently optimize each parameter's bit representation, reducing the total bit length required compared to a single comprehensive scheduling delay field, while still supporting all necessary feedback situations for achieving peak data rate.
3Adaptability or versatility
If multiple delay values are indicated using varying bit lengths, then HARQ-ACK binding window flexibility is improved, but the control signal complexity increases
Solution Approach 1:
The control signal is segmented into multiple fields with different bit lengths: a first field for PDSCH scheduling delay and a second field for HARQ-ACK feedback delay. This segmentation enables the system to indicate multiple delay values with appropriate precision for each parameter, providing flexible HARQ-ACK binding window configuration while keeping each individual field's complexity manageable through optimized bit allocation.
Data Source
AI summary
A system and method of providing a mechanism for determining control information, such as PDSCH scheduling delay and/or HARQ-ACK delay. The system and method include receiving, by a wireless communication device from a wireless communication node, a control signal indicating one of a plurality of physical downlink shared channel (PDSCH) scheduling delays and one of a plurality of hybrid automatic repeat request-acknowledgement (HARQ-ACK) delays; receiving, by the wireless communication device from the wireless communication node, based on the PDSCH scheduling delays, a PDSCH; transmitting, by the wireless communication device to the wireless communication node, based on the HARQ-ACK delays, a HARQ-ACK that corresponds to the received PDSCH.