Secondary Cell Status Management for Wireless Measurement
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Solution Overview
Problem
In wireless communication systems, especially in 5G networks, the process of frequency measurement and carrier aggregation configuration is hindered by the time-consuming nature of frequency scanning and the need for precise gain control in mmWave bands, which increases latency and reduces data transmission efficiency.
Innovation Solution
A method and apparatus that enable rapid frequency measurement and reporting in wireless communication systems by identifying and managing the statuses of secondary cells (SCells) through MAC control elements, allowing for earlier frequency measurement and configuration of carrier aggregation or dual connectivity, thereby reducing latency and enhancing data transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency scanning is performed to access eNB in beamforming communication system, then frequency measurement accuracy is improved, but time consumption increases
Solution Approach 1:
The patent applies preliminary action by performing frequency measurement and SCell status identification before network connection establishment. The terminal identifies SCell statuses and receives MAC CEs during the connection setup phase, allowing frequency measurement to be completed in advance rather than after connection, thus reducing time consumption while maintaining measurement accuracy.
2Power
If gain control is performed for each beam in beamforming communication system, then signal gain is improved, but frequency scanning time increases
Solution Approach 1:
The patent performs frequency measurement and SCell status identification before network connection establishment, allowing the terminal to complete frequency scanning and gain control measurements in advance. This preliminary action reduces the time required for frequency scanning while maintaining the signal gain benefits of beamforming by establishing the measurement results before connection setup begins.
3Manufacturing precision
If carrier aggregation configuration is performed after frequency measurement, then network configuration accuracy is improved, but configuration latency increases
Solution Approach 1:
The patent applies preliminary action by completing frequency measurement and SCell status identification before network connection establishment. The terminal identifies SCell statuses and receives MAC CEs during connection setup, allowing carrier aggregation configuration to be prepared in advance with accurate frequency measurement results, thus reducing configuration latency while maintaining accuracy.
Solution Approach 2:
The terminal autonomously identifies SCell statuses and processes MAC CEs without requiring additional network coordination after connection establishment. This self-service approach allows the terminal to prepare frequency measurement results and SCell status information independently before connection, enabling faster carrier aggregation configuration while maintaining accuracy.
Data Source
AI summary
A method performed by a terminal includes identifying a first status for a secondary cell (SCell) of the terminal, identifying whether a first medium access control (MAC) control element (CE) or a second MAC CE is received from a base station, wherein the first MAC CE indicates that the SCell is transitioned into an activated state or a deactivated state, and the second MAC CE indicates that the SCell is transitioned into the activated state or a dormant state, and determining a second status for the SCell based on the first status and the first MAC CE, in case that the first MAC CE is received from the base station and the second MAC CE is not received from the base station, wherein, in case that the first status for the SCell is the dormant state and the first MAC CE indicates that the SCell is transitioned into the activated state, the second status for the SCell is determined to be maintained as the dormant state, and wherein, in case that the first status for the SCell is the dormant state and the first MAC CE indicates that the SCell is transitioned into the deactivated state, the second status for the SCell is determined as the deactivated state.