Dynamic Signaling for Configured Grant Uplink Efficiency
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Solution Overview
Problem
In wireless communication systems, particularly in 5G New Radio Access Technology, the multi-antenna related information for uplink precoding configured by the base station through higher-layer signaling is often inapplicable due to long periodicity, leading to poor uplink performance, intra-user interference, and power waste.
Innovation Solution
A method where User Equipment (UE) receives first and second signalings indicating time-frequency resource pools and spatial parameter groups, allowing it to autonomously determine whether to transmit a radio signal within the resource pool, using dynamic signaling to assess the applicability of preconfigured multi-antenna information and adjust transmission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the base station configures multi-antenna related information through higher-layer signaling with long periodicity, then signaling overhead is reduced, but the configured information becomes inapplicable in some time windows leading to poor uplink performance
Solution Approach 1:
The patent introduces dynamic signaling (DCI) that can dynamically indicate whether preconfigured multi-antenna information is applicable in each time window, making the system adaptive to changing channel conditions while maintaining the low overhead benefit of RRC configuration
Solution Approach 2:
The base station provides feedback through downlink control information about the applicability of preconfigured multi-antenna parameters, enabling the UE to adjust its transmission based on current channel conditions without requiring frequent reconfiguration
2Productivity
If the UE autonomously transmits in preconfigured resources using previous precoding, then transmission continuity is maintained, but intra-user interference and power waste occur when previous precoding is no longer applicable
Solution Approach 1:
The base station sends feedback information through downlink control information indicating whether the UE should continue using preconfigured multi-antenna parameters, allowing the UE to maintain transmission continuity while avoiding power waste through accurate channel adaptation
Solution Approach 2:
The UE autonomously determines whether to transmit in preconfigured resources based on receiving DCI, balancing autonomous operation with network control to maintain productivity while reducing energy waste
Data Source
AI summary
The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE receives a first signaling for indicating a first time-frequency resource pool and a first spatial parameter group and a second signaling for indicating a second spatial parameter group in turn, the first spatial parameter group being associated to the first time-frequency resource pool including a first time-frequency resource set; the UE judges whether the first time-frequency resource set can transmit a radio signal; if so, the UE transmits a first radio signal in the first time-frequency resource set; otherwise, the UE gives up transmitting a radio signal in the first time-frequency resource set; the first spatial parameter group and the second spatial parameter group judge whether the first time-frequency resource set can transmit a radio signal. The disclosure improves efficiency of configured grant uplink transmission.