Uplink Configured Grants Using Multi-DCI Framework
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink communications from user equipment (UE) to multiple transmission and reception points (TRPs), particularly in 5G systems, where high reliability and low latency are crucial.
Innovation Solution
The UE configures multiple uplink grant configurations (ULCGs) associated with different CORESET pool index values, allowing for the use of a same transport block and HARQ identifiers for uplink transmissions, thereby enhancing communication efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple uplink grant configurations are used for communications to multiple TRPs, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the uplink grant configuration by associating each configuration with a specific CORESET pool index value. This allows the UE to manage multiple uplink grant configurations (first ULCG configuration with first CORESET pool index, second ULCG configuration with second CORESET pool index) independently, reducing the complexity of managing multiple configurations for multiple TRPs while maintaining high reliability through diversified transmission paths
2Productivity
If multiple uplink transmissions use the same transport block, then productivity is improved, but loss of information increases
Solution Approach 1:
The patent applies local quality by associating each uplink grant configuration with distinct HARQ identifier sets specific to that configuration. The first uplink transmission uses HARQ identifiers from the first set associated with the first ULCG configuration, while the second uplink transmission uses HARQ identifiers from the second set associated with the second ULCG configuration. This ensures that even though the same transport block is transmitted multiple times, each transmission can be independently tracked and managed without HARQ identifier confusion
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A communication device, otherwise known as a user equipment (UE) may determine a first uplink configured grant configuration corresponding to a first value of a control resource set (CORESET) pool index, and determine a second uplink configured grant configuration corresponding to a second value of the CORESET pool index different from the first value of the control resource set pool index. The UE may transmit a first uplink transmission during a first uplink grant occasion according to the first uplink configured grant configuration and a second uplink transmission during a second uplink grant occasion according to the second uplink configured grant configuration. Both the first uplink transmission and the second uplink transmission may correspond to a same transport block and a hybrid automatic repeat request (HARQ) identifier.