Terminal Capability Reporting in Random Access Procedure
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently reporting terminal capability information, particularly for reduced capability (redcap) terminals, which require adaptive communication mechanisms to balance low cost, coverage enhancement, and power saving, while existing methods struggle with signaling overhead and accurate capability assessment.
Innovation Solution
A method where terminal capability information is sent to a base station during the random access procedure, indicating supported capabilities such as the number of antennas and communication bandwidth, allowing the base station to determine network access and reduce signaling overhead by acquiring this information in advance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If terminal capability information is reported after connection establishment, then the random access procedure remains simple, but signaling overhead increases and network access determination is delayed
Solution Approach 1:
The patent applies preliminary action by having the terminal report capability information during the random access procedure (specifically in Msg1 or Msg3) before the connection establishment is complete. This allows the base station to determine network access and configure appropriate parameters in advance, reducing the overall time for network access determination while the random access procedure itself remains a standardized process.
2Measurement precision
If terminal capability information is reported in multiple stages, then capability assessment accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential capability information needed for initial network access determination and includes it in the random access messages (Msg1 or Msg3). This selective extraction provides sufficient accuracy for the base station to make initial access decisions and configure appropriate parameters, while avoiding the need to report all possible capability details, thus reducing signaling overhead compared to comprehensive multi-stage reporting.
3Use of energy by moving object
If redcap terminals use standard terminal procedures, then protocol compatibility is maintained, but power consumption increases and coverage enhancement is reduced
Solution Approach 1:
The patent applies local quality by allowing redcap terminals to report specific capability indicators (such as redcap indication bits, reduced capability fields) within the existing random access message structure. This enables the terminal to convey its reduced capability status using minimal additional signaling, allowing the network to apply appropriate power saving and coverage enhancement configurations specifically tailored to redcap terminals without requiring complete protocol modification or increasing overall power consumption.
Data Source
AI summary
A method for reporting terminal capability information, performed by a terminal, includes: sending the terminal capability information to a base station in a random access procedure; in which the terminal capability information is configured to indicate a terminal capability supported by the terminal.