UE Uplink Grant Conflict Resolution Without LCH Prioritization
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Solution Overview
Problem
Existing methods for resolving intra-user equipment uplink resource conflicts in wireless communication, particularly in industrial internet of things (IIoT) applications, require both physical layer-based prioritization (PHY-based) and media access control (MAC) logical channel-based prioritization (LCH-based) capabilities, limiting versatility and leading to inefficiencies such as MAC PDU loss, retransmission, or cancellation when LCH-based prioritization is not configured.
Innovation Solution
A method that configures PHY-based prioritization without LCH-based prioritization, where the physical layer delivers information for resolving overlapping conflicts by comparing PHY priorities directly to the MAC layer, allowing only one MAC PDU to be generated for one of the uplink grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both PHY-based prioritization and LCH-based prioritization are configured, then uplink resource conflict resolution is comprehensive, but UE capability complexity increases and versatility decreases
Solution Approach 1:
The patent extracts the PHY priority comparison function from the MAC layer and places it in the PHY layer. The PHY layer now directly compares PHY priorities of uplink grants and provides resolution information to the MAC layer, eliminating the need for LCH-based prioritization capability while maintaining reliable conflict resolution for IIoT applications.
Solution Approach 2:
The PHY layer is enhanced to perform multiple functions: it not only handles physical transmission but also performs PHY priority comparison and conflict resolution. This multi-functionality allows UEs to operate with only PHY-based prioritization configured, reducing capability complexity while maintaining effective uplink resource management.
2Device complexity
If LCH-based prioritization is not configured, then UE capability complexity is reduced, but MAC PDU loss and retransmission inefficiencies occur
Solution Approach 1:
The PHY layer acts as an intermediary that bridges the gap between grant reception and MAC PDU generation. By comparing PHY priorities and providing resolution information to the MAC layer, the PHY layer enables the MAC layer to generate only one MAC PDU per conflict, preventing loss and retransmission issues without requiring LCH-based prioritization.
3Adaptability or versatility
If PHY-based prioritization is used without LCH-based prioritization, then UE capability versatility is enhanced, but uplink transmission efficiency may deteriorate
Solution Approach 1:
The PHY layer performs preliminary PHY priority comparison when receiving uplink grants, resolving conflicts before they reach the MAC layer. This preliminary action ensures that the MAC layer receives pre-resolved grant information, allowing it to generate the correct number of MAC PDUs efficiently and maintain high uplink transmission productivity.
Data Source
AI summary
A method, a UE, and a non-transitory computer readable medium for PHI-based prioritization without LCH-based prioritization are provided. In an embodiment, the method includes when the LCH-based prioritization is not configured, and the PHY-based prioritization is configured in the UE, receiving, by a PHY layer of the UE, a first uplink grant and a second uplink grant that have an overlapping conflict in time domain, and have a first PHY priority and a second PHY priority, respectively; when uplink transmission for the uplink grants is not on-going, delivering, by the PHY layer, first information to a MAC layer of the UE, wherein the first information is for resolving the overlapping conflict by comparing the first PHY priority with the second PHY priority, and generating, by the MAC layer, only a first MAC protocol data unit for a first one of the uplink grants using the first information.