User Equipment Dynamic Uplink Grant Priority Conflict Resolution
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Solution Overview
Problem
In wireless communications, particularly in industrial IoT scenarios, user equipment faces challenges in resolving conflicts between dynamic and configured grants on different HARQ processes, leading to inefficiencies in processing uplink and downlink data channels, and conflicts between uplink grants and MAC PDUs within the same HARQ process.
Innovation Solution
The implementation of enabling priority indicators allows user equipment to determine and manage conflicts by comparing priorities between uplink grants and MAC PDUs, ensuring that higher priority grants override lower priority ones and optimizing resource allocation through the use of priority indicators configured by the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a MAC PDU is stored in the HARQ buffer for a lower priority uplink grant, then the grant cannot be used to transmit the MAC PDU, but this leads to resource wastage and transmission delays
Solution Approach 1:
The patent introduces dynamic priority indicators (priority indication information) that allow the priority relationship between uplink grants to be flexibly adjusted based on current network conditions and traffic requirements. This enables the system to dynamically change which grant has higher priority, resolving the contradiction by allowing resources to be reallocated efficiently when conditions change, rather than being locked into static priority assignments
Solution Approach 2:
The patent changes the parameter of grant priority by introducing priority indication information that can modify the priority relationship between grants. When a priority indicator is present, it overrides the default priority rules, allowing the system to adapt priority assignments to current needs. This parameter change enables efficient resource utilization while maintaining transmission reliability
2Device complexity
If multiple configured uplink grants are mapped to different HARQ processes, then HARQ processes are differentiated, but conflicts still occur when grants from different HARQ processes overlap in time
Solution Approach 1:
The patent introduces priority indication information as an intermediary mechanism that mediates conflicts between grants from different HARQ processes. When time domain overlap occurs, the priority indicator serves as the deciding factor, allowing quick resolution without complex arbitration procedures. This intermediary enables efficient conflict resolution while maintaining the benefits of multiple HARQ processes
Solution Approach 2:
The patent applies preliminary action by pre-configuring priority relationships between grants before conflicts occur. The priority indication information is provided in advance, so when conflicts arise, the resolution rule is already established, eliminating the need for real-time complex decision-making and reducing resolution time
3Productivity
If priority processing is implemented at the MAC layer, then resource conflict resolution is improved, but the system complexity increases due to additional priority comparison mechanisms
Solution Approach 1:
The patent extracts the priority determination logic from complex MAC layer processing by using simple priority indication information that can be directly compared. The critical priority comparison function is separated out and simplified, allowing efficient resource conflict resolution without requiring complex MAC layer intervention for every decision
Data Source
AI summary
According to the present invention, a method performed by user equipment (UE) is provided, comprising: receiving dynamic uplink grant for a medium access control (MAC) entity; determining, for the received dynamic uplink grant, whether a first configuration condition is satisfied; and if the first configuration condition is satisfied, delivering the uplink dynamic grant to a hybrid automatic repeat request (HARQ) entity.