Configured Grant Collision Resolution for Reliable Uplink Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing collisions between multiple configured grants, particularly in supporting Ultra Reliable and Low Latency Communications (URLLC) and Industrial Internet of Things (IIoT), where collisions can lead to data transmission conflicts and inefficiencies.
Innovation Solution
A method and apparatus for a user equipment (UE) to receive and verify collisions among configured grants, select a single grant based on priority and time order, and transmit data using the selected grant, while also enabling retransmission of omitted data through uplink grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple configured grants are supported for different services, then service flexibility and adaptability are improved, but collision probability and transmission conflicts increase
Solution Approach 1:
The patent segments the grant management by introducing separate handling mechanisms for different service types (URLLC and IIoT) and their respective configured grants. The UE identifies and processes grants based on service type, applying different collision resolution strategies for each service category, thereby maintaining service flexibility while reducing transmission conflicts through targeted segmentation.
Solution Approach 2:
The patent implements preliminary collision detection and resolution mechanisms where the UE proactively identifies potential conflicts between multiple configured grants before transmission occurs. By verifying transmission time overlaps in advance and pre-selecting appropriate grants based on service priority and type, the system prevents transmission conflicts rather than reacting to them after they occur.
2Reliability
If configured grants are selected based on priority, then transmission reliability is improved, but processing complexity increases
Solution Approach 1:
The patent applies local quality by assigning different selection criteria to different service types. For URLLC services, the UE prioritizes grants based on strict timing requirements and reliability needs, while for IIoT services, the UE uses different priority rules suited to their operational characteristics. This localized differentiation simplifies the overall complexity by avoiding a single complex universal selection algorithm.
Solution Approach 2:
The UE autonomously performs priority verification and grant selection based on pre-configured service parameters and RRC messages received from the base station. The self-service mechanism reduces the need for complex centralized control by enabling the UE to independently manage grant selection according to its own service requirements and priority levels.
3Productivity
If collision resolution is implemented, then transmission efficiency is improved, but processing time and latency increase
Solution Approach 1:
The patent applies skipping by enabling the UE to rapidly identify and select the appropriate configured grant when collisions are detected, bypassing exhaustive search or deliberation processes. The UE uses pre-established priority rules and service type identification to quickly determine which grant to transmit, minimizing processing time while maintaining transmission efficiency.
Solution Approach 2:
The UE performs preliminary verification of transmission time overlaps and pre-determines grant selection criteria before actual transmission occurs. By preparing collision resolution decisions in advance based on configured grant parameters and service priorities, the system reduces real-time processing time and latency during critical transmission moments.
Data Source
AI summary
The present disclosure can provide a method in which a terminal performs transmission in a wireless communication system. The method for performing transmission can comprise the steps in which: a terminal receives a plurality of pre-configured resources; the device confirms as to whether the plurality of pre-configured resources collide; the terminal selects any one pre-configured resource among a plurality of collided pre-configured resources; and transmission for the selected preconfigured resource is performed.