Grant-Free PUSCH UCI Transmission Priority Rules
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Solution Overview
Problem
In New Radio (NR) networks, there is a challenge in handling simultaneous transmission of uplink control information (UCI) and grant-free Physical Uplink Shared Channel (PUSCH) transmissions due to potential collisions in time, which can lead to misalignment and processing delays, especially in ultra-reliable and low-latency communications (URLLC) scenarios where stringent latency requirements must be met.
Innovation Solution
The implementation of priority rules on User Equipment (UE) to manage the transmission of UCI and grant-free PUSCH, where the UE prioritizes URLLC transmissions over UCI, allowing for either dropping UCI, delaying PUSCH, or puncturing PUCCH to avoid collisions, and using power sharing mechanisms to ensure reliable decoding at the gNodeB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits both UCI and grant-free PUSCH simultaneously, then the control information and data can be delivered in parallel, but collisions in time occur leading to misalignment and processing delays
Solution Approach 1:
The patent implements dynamic priority rules that allow the UE to adaptively switch between transmission modes based on real-time conditions. When URLLC data arrives, the system dynamically prioritizes it over UCI, enabling flexible resource allocation that maintains reliability for time-critical transmissions while preserving overall system productivity through adaptive resource management.
Solution Approach 2:
The patent changes the transmission parameters by introducing power sharing mechanisms and priority-based resource allocation. By dynamically adjusting power distribution and resource assignment based on transmission priority, the system resolves collisions between UCI and grant-free PUSCH, ensuring that high-priority URLLC transmissions maintain their reliability while minimizing impact on overall system throughput.
2Loss of time
If the UE prioritizes URLLC transmissions over UCI, then latency requirements are met, but UCI transmission may be delayed or dropped
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of priority rules and power sharing algorithms that mediate between URLLC data transmissions and UCI transmissions. This intermediary layer ensures that when resources conflict, URLLC transmissions receive priority allocation to meet latency requirements, while UCI transmissions are systematically managed through power sharing and scheduling to minimize information loss.
Solution Approach 2:
The patent applies partial action by allowing UCI transmission to be partially maintained through power sharing mechanisms. Instead of completely dropping UCI when URLLC prioritization is needed, the system allocates reduced power resources to UCI, enabling partial transmission that preserves critical control information while meeting URLLC latency requirements.
3Reliability
If power sharing mechanisms are used to ensure reliable decoding, then transmission reliability improves, but system complexity increases
Solution Approach 1:
The patent implements self-service through autonomous priority-based resource allocation at the UE level. The UE automatically applies priority rules and power sharing mechanisms without requiring complex network coordination, enabling reliable decoding through local decision-making. This self-service approach maintains high reliability while minimizing system complexity by distributing intelligence to the edge devices.
Solution Approach 2:
The patent uses simplified, rule-based power sharing mechanisms that can be implemented with minimal processing overhead. Rather than employing complex adaptive algorithms, the system uses predetermined priority rules and straightforward power allocation strategies that achieve reliable decoding through simple, computationally efficient operations.
Data Source
AI summary
An apparatus of a New Radio (NR) User Equipment (UE), a method and system. The apparatus includes baseband circuitry including a radio frequency (RF) interface and one or more processors coupled to the RF interface and configured to execute the instructions to: encode a plurality of Transport Blocks (TBs) and encode a first uplink transmission using the TBs and in a grant-free mode to a NR evolved Node B (gNodeB); decode a downlink control information (DCI) from the gNodeB; based on the DCI, encode a second uplink transmission using the TBs to the gNodeB, wherein the second uplink transmission is one of in a grant-free mode and in a grant-based mode, and wherein the DCI includes information on an identification (ID) for a hybrid automatic repeat request-acknowledge feedback (HARQ) process (HARQ process ID) corresponding to the second uplink transmission, the HARQ process ID being based on a resource configuration index corresponding to the second uplink transmission; and send the TBs, the first encoded uplink transmission, and the second encoded uplink transmission to the RF interface.


