Terminal Device Cell Detection Using Rx Beam Spatial Direction
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Solution Overview
Problem
In scenarios of carrier aggregation and dual connectivity, terminal devices face challenges in efficiently detecting cells due to limitations in Rx beam usage, leading to increased latency and power consumption.
Innovation Solution
The terminal device receives information to connect to a second cell aggregated with a first cell, determines the Rx beam on which this information is received, and detects a reference signal from the second cell on this spatial direction if it is unknown, allowing for efficient cell detection and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs comprehensive cell detection across all spatial directions, then the detection completeness is improved, but the search and measurement effort increases leading to higher latency and power consumption
Solution Approach 1:
The patent applies preliminary action by having the terminal device detect reference signals from the second cell in advance, before actually connecting to it. The terminal device performs this detection using the same Rx beam that received the connection information from the first cell, thereby preparing the detection results beforehand to avoid time-consuming comprehensive scanning when connection is needed.
Solution Approach 2:
The patent applies local quality by focusing the reference signal detection only in the specific spatial direction of the Rx beam used for receiving connection information, rather than performing omnidirectional detection. This localized detection approach maintains detection reliability for the relevant direction while significantly reducing the overall search and measurement effort.
2Reliability
If the terminal device performs comprehensive cell detection across all spatial directions, then the detection completeness is improved, but the power consumption increases
Solution Approach 1:
The terminal device performs reference signal detection in advance using the Rx beam that will be used for connection, so that when connection is required, the detection is already completed. This eliminates the need for power-intensive comprehensive spatial scanning at the moment of connection.
Solution Approach 2:
The detection is localized to the specific spatial direction of the Rx beam rather than performing full 360-degree scanning. This local quality approach maintains sufficient detection reliability for the relevant direction while dramatically reducing the total energy consumption associated with comprehensive detection.
3Device complexity
If the terminal device uses a single Rx beam for receiving connection information, then the device complexity is reduced, but the ability to detect cells in other spatial directions is limited
Solution Approach 1:
The patent applies local quality by concentrating the detection capability on the specific spatial direction of the Rx beam used for receiving connection information. The terminal device detects reference signals only in this local direction rather than requiring comprehensive omnidirectional detection, thereby maintaining sufficient detection capability while using a single Rx beam and reducing device complexity.
Data Source
AI summary
Embodiments of the disclosure provide a method, device and computer readable medium for detecting cells in scenarios of carrier aggregations. According to embodiments of the present disclosure, if the terminal device receives information indicating to connect to a different cell from the currently connecting cell, the terminal device detects the different cell in a spatial direction of the beam on which the information is received. In this way, a significant reduction in terminal device search and measurement effort is achieve, which leads to significant reduction in the latency.