Grant-Free Uplink Resource Allocation for Wireless Communication
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing control signaling overhead and scheduling delay, particularly in Grant-Free uplink transmission schemes where resource allocation complexity is high and flexibility is limited.
Innovation Solution
A method in a User Equipment (UE) for wireless communication that involves receiving configuration information to determine specific time-frequency resources, generating radio signals based on these resources, and implicitly configuring resources for subsequent signals to enhance transmission efficiency and reduce ambiguity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Grant-Free uplink transmission is implemented to reduce control signaling overhead and scheduling delay, then transmission efficiency is improved, but resource allocation flexibility deteriorates due to fixed resource sizes
Solution Approach 1:
The patent applies dynamics by enabling the UE to dynamically select from multiple first-type sets based on the number of first radio sub-signals (M1). This allows the resource allocation to adapt flexibly to different transmission scenarios while maintaining Grant-Free operation, resolving the contradiction between transmission efficiency and resource allocation flexibility.
Solution Approach 2:
The patent changes the parameter of resource set configuration by providing multiple first-type sets with different configurations. The UE selects the appropriate set based on M1, enabling parameter adaptation without requiring traditional Grant-based scheduling, thus improving transmission efficiency while maintaining flexibility.
2Adaptability or versatility
If multiple first-type sets are configured to enable flexible resource selection, then resource allocation flexibility is improved, but device complexity increases due to additional configuration management
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple first-type sets through configuration information received before transmission. This allows the UE to have flexible resource options ready in advance, eliminating the need for complex real-time resource allocation decisions and reducing device complexity during actual transmission.
3Loss of information
If implicit resource configuration is used to save control information, then control signaling overhead is reduced, but measurement precision deteriorates due to ambiguity in resource determination
Solution Approach 1:
The patent applies feedback by using the first sequence to generate first radio sub-signals, where the sequence acts as a reference that provides feedback information. This allows the receiver to accurately determine the selected first-type set through correlation detection, eliminating ambiguity in implicit resource configuration while minimizing control signaling overhead.
4Device complexity
If fixed resource allocation is used to simplify base station reception, then device complexity is reduced, but resource waste increases due to inability to adapt to varying data sizes
Solution Approach 1:
The patent applies segmentation by dividing the uplink transmission into multiple first radio sub-signals (M1). The UE selects from multiple first-type sets based on M1, allowing the resource allocation to be segmented and matched to the actual data size. This reduces resource waste while keeping base station reception simple through Grant-Free operation.
Data Source
AI summary
The present disclosure discloses a method and a device in wireless communication. A User Equipment receives first information; and then transmits a first radio signal; and transmits a second radio signal. The first information comprises P1 piece(s) of configuration information, each of which is used to determine first-type resources, a first-type integer, and a first-type set; the first radio signal and the second radio signal comprises M1 first and M2 second radio sub-signal(s), respectively; the M2 is an element within a target set which is a positive integer; time-frequency resources occupied by the first radio signal belong to the first-type resources determined by first configuration information, the M1 is the first-type integer determined by the first configuration information, the target set is the first-type set determined by the first configuration information. The present disclosure provides a method of determining a number of non-grant uplink repeated transmissions while avoiding timing confusion.