Random Access Feedback for Beam and BWP Parameter Tuning
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Solution Overview
Problem
The optimization of random access configuration parameters is crucial for improving network performance, as inappropriate settings can lead to increased collision probabilities, reduced preamble detection rates, and limited system coverage, especially in scenarios where network configurations change, such as adjustments to antenna tilt or cell transmit power.
Innovation Solution
A communication method where the terminal device reports specific information about successful and failed random access attempts, including beam, uplink carrier, and bandwidth part details, allowing the network device to optimize these parameters dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the random access configuration parameter is optimized to reduce collision probability, then the call setup success rate and handover success rate improve, but the system requires more complex parameter adjustment mechanisms and real-time feedback loops
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device reports random access failure information (including failure cause, cell identity, and beam identity) to the network device. The network device uses this feedback to dynamically adjust random access configuration parameters, creating a closed-loop system that improves reliability while automating the adjustment process rather than requiring manual intervention
Solution Approach 2:
The terminal device actively participates in the optimization process by autonomously identifying random access failures and reporting relevant information to the network device. This self-service approach allows the system to automatically detect and respond to performance issues without requiring external manual analysis or intervention
2Reliability
If the random access configuration parameter is adjusted to improve system coverage, then the preamble detection rate increases, but the collision probability may increase and requires careful parameter balancing
Solution Approach 1:
The patent dynamically adjusts multiple random access configuration parameters including power ramping step size, maximum preamble transmission power, and random access retry intervals based on the terminal's reported failure information. This allows the system to optimize the balance between detection rate and collision probability by adapting parameters to specific failure scenarios rather than using fixed conservative settings
Solution Approach 2:
The optimization is performed locally for each terminal device based on its specific failure conditions and environment. The network device adjusts parameters individually for different terminals and cells, allowing tailored optimization that addresses local coverage issues without adversely affecting other users or cells
3Productivity
If real-time feedback mechanisms are implemented to optimize parameters dynamically, then the random access performance improves, but the signaling overhead and processing complexity increase
Solution Approach 1:
The patent extracts only the essential information needed for optimization from the terminal device, specifically focusing on failure cause, cell identity, and beam identity. By selecting and reporting only these critical parameters rather than comprehensive channel state information, the system achieves effective optimization while minimizing signaling overhead
Data Source
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AI summary
This application provides a communication method, apparatus, and system. The method includes: determining first information, where the first information includes one or more types of information about an associated beam for a random access success of the terminal device, information about an associated uplink carrier for a random access success of the terminal device, or information about an associated bandwidth part BWP for a random access success of the terminal device, and/or includes information about a random access channel RACH resource for a random access failure of the terminal device, and the random access failure of the terminal device includes one or more of a 2-step (2-step) random access failure, a 4-step (4-step) random access failure, a dedicated random access channel RACH resource random access failure, or a common RACH resource random access failure; and sending the first information. According to the method provided in embodiments of this application, a configuration parameter used in a random access procedure can be optimized.