Grant-less Uplink Prioritization for Low Latency Data
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Solution Overview
Problem
Current communication technologies, such as MulteFire, prioritize scheduled PUSCH transmissions over grant-less uplink (GUL) transmissions, leading to increased latency and overhead in high reliable low latency communication networks, particularly in scenarios where GUL resources collide with scheduled PUSCH resources.
Innovation Solution
The method involves prioritizing grant-less uplink transmissions for high reliable low latency communications by allowing user equipment to autonomously select between GUL and scheduled PUSCH formats, using specific rate matching parameters to map data onto available resources, and including GUL uplink control information to distinguish the transmission format, thereby enabling efficient transmission even when GUL resources are not available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scheduled PUSCH transmissions are prioritized over grant-less uplink transmissions, then resource allocation reliability is improved, but transmission latency increases and overhead increases
Solution Approach 1:
The patent implements dynamic prioritization where the UE can switch between scheduled PUSCH and grant-less uplink formats based on data characteristics. HRLLC data automatically triggers GUL format selection, while non-HRLLC data uses scheduled PUSCH, allowing the system to adapt transmission mode to requirements in real-time
Solution Approach 2:
The patent changes the transmission format parameter based on data type. When HRLLC data is detected, the system changes from scheduled PUSCH format to grant-less uplink format, fundamentally altering the transmission parameters to achieve lower latency and overhead while maintaining reliability for critical data
2Extent of automation
If scheduled PUSCH transmissions are prioritized over grant-less uplink transmissions, then resource scheduling control is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the scheduling request and grant signaling elements from the transmission process by using grant-less uplink format. The UE autonomously selects and executes the transmission without requiring uplink grants, removing the signaling overhead associated with scheduled PUSCH while maintaining network control through configuration parameters
Solution Approach 2:
The UE performs self-service by autonomously selecting the transmission format based on data characteristics. The device independently determines when to use grant-less uplink versus scheduled PUSCH without network intervention, eliminating signaling overhead while maintaining proper resource management through pre-configured parameters
3Loss of time
If grant-less uplink transmissions are prioritized for high reliable low latency communications, then transmission latency is reduced, but collision probability increases when GUL resources overlap with PUSCH
Solution Approach 1:
The patent applies different transmission format qualities to different data types. HRLLC data receives the high-priority grant-less uplink format with autonomous transmission characteristics, while non-critical data uses the controlled scheduled PUSCH format, creating localized optimization without system-wide collision issues
Solution Approach 2:
The network pre-configures multiple grant-less uplink formats and parameters before transmission occurs. The UE has advance knowledge of available formats and selection criteria, allowing immediate transmission when HRLLC data arrives without requiring real-time scheduling decisions that could cause collisions
4Productivity
If user equipment autonomously selects between GUL and scheduled PUSCH formats, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent simplifies the autonomous selection process by using clear parameter-based decision rules. The UE checks data characteristics (HRLLC flag) and automatically selects the appropriate format based on pre-configured parameters, transforming a complex selection problem into a simple parameter-driven decision process
Solution Approach 2:
The UE performs self-service format selection based on simple criteria rather than requiring complex network coordination. The device independently evaluates its own data buffer and selects the optimal format using pre-configured rules, reducing both device complexity and network signaling requirements
Data Source
AI summary
In accordance with example embodiments of the invention there is at least a method and apparatus to perform receiving at a user equipment an indication of a scheduled resource for an uplink shared channel transmission by the user equipment; determining that a high reliability low latency communication is to be transmitted by the user equipment; and based on the determining, prioritizing a transmission of the high reliability low latency communication on the scheduled resource of the uplink shared channel using a selected transport format to encode the high reliability low latency communication. Further, there is at least a method and apparatus to perform sending to a user equipment an indication of a scheduling resource for an uplink shared channel transmission by the user equipment; and in response to the sending, receiving from the user equipment said uplink shared channel transmission using a selected transport format.