SCell Activation Beam Reporting for Early Data Transmission
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Solution Overview
Problem
The activation delay for secondary cells (SCells) in communication systems like NR and LTE is significant, particularly for unknown SCells in FR2, leading to wasted channel capacity and reduced throughput due to the time required for beam detection and measurement.
Innovation Solution
A terminal device determines the possibility of early data transmission during SCell activation by reporting one or more transmit beams to the network device, allowing the network to schedule and initiate data transmission before complete activation is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device waits for complete SCell activation before data transmission, then the activation procedure is completed properly with accurate beam detection, but the activation delay increases and channel capacity is wasted
Solution Approach 1:
The terminal device performs beam detection and measurement procedures in advance during the SCell activation process, and reports beam information to the network device before complete activation is achieved. This allows the network to prepare scheduling decisions earlier, reducing the overall activation delay while ensuring reliable data transmission.
2Productivity
If early data transmission is enabled during SCell activation, then the activation delay is reduced and channel capacity is utilized, but the risk of transmission errors may increase due to incomplete activation
Solution Approach 1:
The terminal device completes beam detection and reports beam information to the network device during the activation process, enabling the network to make informed scheduling decisions before full activation is complete. This preliminary beam information ensures that early data transmission uses appropriate beams, maintaining reliability while reducing delay.
Solution Approach 2:
The terminal device provides beam reports as feedback to the network device during the activation process. This feedback mechanism allows the network to adjust scheduling decisions based on actual beam conditions, ensuring reliable data transmission even during early activation stages.
3Measurement precision
If the terminal device performs comprehensive beam detection and measurement, then the beam selection accuracy is improved, but the activation time increases
Solution Approach 1:
The terminal device performs partial beam detection and measurement during the activation process, reporting beam information to the network device before complete activation. This partial action approach provides sufficient beam accuracy for early data transmission while avoiding the full time cost of comprehensive beam detection, thus reducing activation time.
Data Source
AI summary
Embodiments of the present disclosure relate to data transmission at SCell activation. A terminal device determines that a first data transmission in a secondary cell provided by a network device is possible during an activation procedure of the secondary cell. Then, the terminal device transmits, to the network device, a first beam report of one or more transmit beams for the secondary cell. Moreover, the terminal device receives, from the network device, scheduling of the first data transmission in the secondary cell. As a result, the efficiency of data transmission at secondary cell (SCell) activation may be improved.