Uplink Resource Utilization via Unused CG-PUSCH Indication
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Solution Overview
Problem
Current 5G NR systems face challenges in efficiently managing uplink transmission resources, particularly when multiple configured grant (CG)-physical uplink shared channel (PUSCH) transmissions are configured, leading to underutilization of transmission resources due to pre-defined and inflexible transmission periods and areas.
Innovation Solution
A method is introduced to dynamically indicate unused CG-PUSCH transmission occasions using uplink control information (UCI), allowing terminals to configure and transmit UCI to indicate unused resources, which can be reused for other transmissions, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple CG-PUSCH transmission occasions are configured with pre-defined transmission periods and areas, then transmission resource allocation is simplified and reliable, but transmission resource utilization deteriorates due to underutilization of available resources
Solution Approach 1:
The patent introduces dynamic indication mechanisms where terminals can signal unused transmission occasions to the base station through uplink control information (UCI) or scheduling requests (SR). This allows the transmission system to transition from static pre-defined resource allocation to dynamic resource indication, enabling real-time adaptation of resource usage based on actual transmission needs while maintaining the reliability of the configured grant framework.
Solution Approach 2:
The patent enables parameter changes by allowing terminals to indicate which transmission occasions remain unused through configurable parameters such as bitmap fields in UCI or SR. The base station can then adjust resource allocation parameters dynamically based on these indications, changing the state of resource utilization from fixed to flexible while maintaining system reliability through controlled parameter modification.
2Ease of operation
If transmission occasions are pre-defined in CG-PUSCH configuration, then system complexity is reduced and operation is easier, but adaptability deteriorates due to inflexible transmission periods and areas
Solution Approach 1:
The patent implements feedback mechanisms where terminals provide information about unused transmission occasions back to the base station through UCI or SR. This feedback loop enables the base station to adapt the transmission configuration dynamically while maintaining the operational simplicity of configured grants. The system retains ease of operation through pre-defined configurations while gaining adaptability through terminal-initiated feedback about actual resource usage patterns.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple transmission occasions and the mechanisms for indicating unused resources (UCI/SR configurations) in advance. This preliminary setup maintains operational simplicity while enabling future adaptability, as the terminal and base station already have the necessary configurations in place to dynamically adjust resource usage without complex real-time negotiations.
3Ease of operation
If unused transmission resources are not indicated and reused, then system operation remains simple, but resource capacity is lost and transmission efficiency deteriorates
Solution Approach 1:
The patent enables self-service by allowing terminals to autonomously identify and indicate their own unused transmission occasions through UCI or SR mechanisms. The terminal serves itself by monitoring its transmission patterns and reporting unused resources without requiring complex base station scheduling interventions. This maintains operational simplicity while enabling resource reuse that improves transmission capacity and efficiency.
Solution Approach 2:
The patent implements discarding and recovering by identifying unused transmission occasions (discarded resources) through terminal indication and then recovering these resources for reallocation. The base station can recover the indicated unused resources and reallocate them to other terminals or purposes, transforming wasted capacity into productive resources while maintaining simple configured grant operations through the indication mechanism.
Data Source
AI summary
Provided are a method and apparatus for controlling uplink transmission in a wireless communication system. A base station may configure and transmit information on one configured grant (CG)-physical uplink shared channel (PUSCH) configuration information including multiple transmission occasions to a terminal. The terminal may perform the one CG-PUSCH configuration, configure uplink control information (UCI) for indicating an unused transmission occasion of the one CG-PUSCH configuration, and transmit the UCI for indicating the unused transmission occasion of the one CG-PUSCH configuration to the base station. The UCI for indicating the unused transmission occasion is configured regarding whether to include the UCI in at least one of the multiple transmission occasions of the one CG-PUSCH configuration and based on an indication from a base station.