Uplink Sidelink Resource Overlap Priority Resolution
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Solution Overview
Problem
In wireless communication systems, particularly in V2X technology, there is a challenge in managing overlapped uplink and sidelink resources, where user equipment (UE) must prioritize transmissions to avoid conflicts and optimize communication efficiency during random access channel (RACH) procedures.
Innovation Solution
The method involves receiving an uplink resource grant from a base station, determining a sidelink resource that overlaps with the uplink resource, and prioritizing transmissions based on the type of RACH procedure, priority thresholds, and allocation modes to ensure efficient transmission, either prioritizing uplink or sidelink transmissions depending on their respective priorities and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink and sidelink resources are overlapped, then resource utilization is improved, but transmission conflicts and reliability deteriorate
Solution Approach 1:
The patent changes the parameter of transmission priority by introducing priority indicators in DCI formats and configuring priority thresholds. The base station dynamically adjusts the priority of uplink grants through DCI signaling, allowing the system to resolve conflicts between uplink and sidelink transmissions by comparing priority values and threshold comparisons, thus maintaining reliability while enabling resource overlap.
2Reliability
If uplink transmission is prioritized during RACH procedure, then random access reliability is improved, but sidelink transmission latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring priority thresholds and priority indicators before the conflict occurs. The base station configures priority thresholds for different RACH message types (Msg1, Msg3, etc.) in advance, and assigns priority indicators to uplink grants beforehand. When a conflict is detected, the pre-configured parameters enable rapid decision-making without real-time computation, thus prioritizing RACH transmissions while minimizing sidelink latency through efficient priority comparison.
3Reliability
If priority-based resource selection is implemented, then transmission conflict resolution is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the UE to autonomously determine transmission priorities using pre-configured parameters. The UE receives priority thresholds and priority indicators from the base station, then independently compares these parameters to decide whether to prioritize uplink or sidelink transmissions. This self-service mechanism eliminates the need for complex network-controlled arbitration, reducing device complexity while maintaining reliable conflict resolution through standardized priority comparison logic.
Data Source
AI summary
Aspects of the disclosure provide methods and an apparatus to transmit with resources overlapped. For example, the apparatus can include receiving circuitry, processing circuitry, and transmitting circuit. The receiving circuitry receives a grant of an uplink resource for an uplink transmission from a base station at a user equipment (UE). The processing circuitry determines a sidelink resource for a sidelink transmission based on a grant from the base station or an autonomous selection by the UE. The transmitting circuitry prioritizes the uplink transmission with the uplink resource over the sidelink transmission with the sidelink resource when the sidelink resource overlaps the uplink resource and a message of a random access channel (RACH) procedure is to be transmitted.