UE Uplink Resource Set Selection for URLLC Reliability
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Solution Overview
Problem
The 5G system faces challenges in ensuring transmission reliability of physical layer control channels, particularly for Ultra-Reliable and Low Latency Communications (URLLC), without compromising spectrum efficiency in other application scenarios.
Innovation Solution
A method for User Equipment (UE) and base station to select radio resources from a set of K resource sets, each designed for varying transmission reliability requirements, using signaling to implicitly indicate a target parameter set for optimal resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple resource sets with different reliability parameters are configured for URLLC, then transmission reliability is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements dynamic selection of resource sets based on real-time transmission requirements. The UE and base station dynamically choose appropriate resource sets from pre-configured options based on current reliability needs, payload size, and channel conditions, rather than using a fixed resource allocation scheme. This dynamic adaptation allows the system to maintain high reliability when needed while reducing complexity for less demanding transmissions.
Solution Approach 2:
The patent changes key parameters such as payload size thresholds, resource set indices, and reliability requirements to optimize resource allocation. By adjusting these parameters based on traffic characteristics and channel conditions, the system can adaptively select from multiple configured resource sets, achieving high transmission reliability for URLLC while managing device complexity through parameter-based differentiation rather than structural complexity.
2Loss of information
If implicit indication of target parameter set is used, then signaling overhead is reduced, but measurement precision and resource allocation accuracy may be affected
Solution Approach 1:
The patent designs the implicit indication mechanism to serve multiple functions simultaneously: it indicates the target parameter set for resource selection, conveys reliability requirements, and enables efficient resource allocation all through a compact signaling format. The implicit indication works across different payload sizes and reliability scenarios, making the signaling mechanism universally applicable while maintaining accuracy through clever encoding of multiple pieces of information in a unified indication structure.
Solution Approach 2:
The patent introduces an intermediate mapping relationship between the implicit indication and the actual resource set selection. Rather than directly specifying resource parameters, the indication serves as an intermediary that maps to pre-configured parameter sets, allowing compact signaling while maintaining precise resource allocation through the pre-established mapping tables and configuration parameters stored at both UE and base station.
Data Source
AI summary
A method and device in UE and base station used for wireless communications are disclosed in the present disclosure. A UE receives a first signaling; and transmits a first radio signal in a first radio resource. The first radio resource belongs to a first resource set of K resource set(s), any of the K resource set(s) comprising a positive integer number of radio resource(s), K being a positive integer; the first signaling is used for determining a target parameter set, and the target parameter set is a first parameter set or a second parameter set, the first parameter comprising a positive integer number of first-type parameter(s) and the second parameter comprising a positive integer number of second-type parameter(s); the target parameter set is used for determining the first radio resource. The method herein applies to all requirements of uplink transmission reliability in various application scenarios.