Cell Activation L3 Reporting Delay for Faster Network Handover
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Solution Overview
Problem
The transition from a deactivated to an activated cell status in wireless communication systems, such as NR and LTE, takes an undefined and potentially lengthy period, which is not optimized for efficient cell activation.
Innovation Solution
A method for determining a time period for reporting Layer 3 (L3) measurements upon cell activation, allowing the terminal device to transmit L3 reports within specific time constraints, based on various factors including transmission of reports, reception of commands, or information from the network device, to reduce activation delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device waits for an undefined period before activating the cell, then the cell activation process is simple, but the activation delay becomes excessive and inefficient
Solution Approach 1:
The patent changes the time parameter from undefined to defined by establishing specific reporting delay values (e.g., 3ms, 4ms, 5ms) for L3 measurement reporting after cell activation. This parameter change enables the network to predict and optimize activation timing, directly reducing the activation delay while maintaining system simplicity.
Solution Approach 2:
The patent applies preliminary action by having the terminal device prepare and report L3 measurements within a defined time period after receiving the activation command. This preliminary reporting allows the network to pre-plan resource allocation and activation timing, reducing the overall activation delay without complicating the activation process itself.
2Loss of time
If the terminal device reports L3 measurements immediately upon cell activation, then the activation delay is reduced, but the complexity of determining the reporting time period increases
Solution Approach 1:
The patent uses feedback mechanisms where the network device provides configuration information to the terminal device regarding the reporting time period. The terminal device then follows these configured parameters to determine when to report L3 measurements, reducing the complexity of time period determination while enabling timely reporting that reduces activation delay.
Solution Approach 2:
The patent introduces dynamic time period determination where the reporting delay can be configured based on different scenarios (e.g., 3ms for FR2, 5ms for FR1). This dynamic approach allows the system to adapt the reporting timing to specific activation scenarios, reducing delay without requiring complex real-time calculations at the terminal device.
3Measurement precision
If the network device waits for L3 measurements before completing cell activation, then measurement accuracy is improved, but the overall activation time increases
Solution Approach 1:
The patent applies preliminary action by having the terminal device complete L3 measurements and reporting within a defined time period before the activation process is fully completed. This preliminary measurement and reporting enables the network to have accurate measurement data available for decision-making without extending the overall activation duration, as the measurements are performed in parallel with the activation process.
Solution Approach 2:
The patent allows the activation process to proceed through defined time periods (e.g., 3ms, 4ms, 5ms) without requiring the network to wait indefinitely for measurements. The system rushes through the activation process with predetermined timing, ensuring measurements are obtained within acceptable windows without blocking the overall activation flow.
Data Source
AI summary
Embodiments of the present disclosure relate to a reporting delay for cell activation. In an aspect, a terminal device receives from a network device, a cell activation command for activation of the cell. The terminal device determines a time period for reporting layer 3 (L3) measurement for the activation of the cell based on one of (i) transmitting of a report from the terminal device, (ii) receiving of a command from the network device, or (iii) information for determining the time period received from the network device. Then the terminal device transmits the L3 measurement to the network device within the time period. As such, the terminal device can determine a time period to be used for reporting L3 measurement upon cell activation command and transmits L3 report to the network device within the time period.