Configured Grant Sharing for Idle UE Resource Reuse
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless networks operating at millimeter wave frequencies, directional transmission and reception are challenged by high propagation loss, oxygen absorption, and penetration issues, leading to inefficient use of configured grant resources due to continuous UE transmissions without data, reducing spectral efficiency.
Innovation Solution
A secondary user equipment (UE) determines when a primary UE is not transmitting on a shared configured grant (CG) resource and transmits data on that resource, optimizing resource use by either partially or fully utilizing the unused portions, and implementing different mapping types or shorter durations for secondary UE transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If configured grant resources are continuously allocated to primary UE for directional transmission, then transmission reliability is improved, but spectral efficiency deteriorates due to idle resources when no data is transmitted
Solution Approach 1:
The configured grant resource is designed to serve multiple purposes: primarily for the primary UE's directional transmission, and secondarily for secondary UEs' uplink data transmission when the primary UE has no data. This multi-functionality allows the same resource to adapt to different transmission needs, improving spectral efficiency without compromising the primary UE's transmission reliability.
Solution Approach 2:
The system enables secondary UEs to autonomously detect when the primary UE is not transmitting and independently utilize the idle configured grant resources for their own uplink data transmission. This self-service mechanism eliminates the need for continuous network scheduling decisions, allowing efficient resource utilization while maintaining the primary UE's dedicated resource allocation for when needed.
2Stability of the object's composition
If configured grant resources are allocated exclusively to primary UE, then transmission stability is improved, but resource utilization efficiency deteriorates due to idle periods
Solution Approach 1:
The resource allocation scheme transitions from a static exclusive allocation to a dynamic shared allocation. The configured grant resource dynamically switches between being dedicated to the primary UE and being available for secondary UEs based on real-time transmission needs. This dynamic adjustment maintains transmission stability for the primary UE while improving resource utilization efficiency during idle periods.
Solution Approach 2:
The system implements periodic monitoring of the primary UE's transmission status on configured grant resources. Secondary UEs periodically check whether the primary UE is transmitting, and when no transmission is detected, they periodically utilize the resource for their own data transmission. This periodic action pattern maintains stability while enabling efficient resource reuse during idle intervals.
3Productivity
If secondary UE transmits on shared CG resource, then spectral efficiency is improved, but risk of transmission collision increases
Solution Approach 1:
The system implements feedback mechanisms where secondary UEs monitor the configured grant resource for presence of primary UE transmissions before initiating their own transmissions. This feedback loop allows secondary UEs to detect and avoid collision scenarios, ensuring that they only transmit when the resource is confirmed to be idle, thus improving spectral efficiency without significantly compromising transmission reliability.
Data Source
AI summary
The invention refers to a method (400) performed by a secondary user equipment, UE, the method comprising determining (s402) a transmission activity of a primary UE on a configured grant, CG, resource that is shared by the primary UE and the secondary UE; and transmitting data (s404) on the CG resource after determining that the primary UE will not transmit or is not transmitting data on the CG; the invention further refers to a corresponding user equipment.