Random Access Configuration Parameter Selection for Interference Reduction
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Solution Overview
Problem
Current random access methods in communication systems have low efficiency due to simple random access channel (RACH) resource configuration and power ramp parameters, leading to increased interference to neighboring cells and prolonged processing delays.
Innovation Solution
Configuring user equipment (UE) with multiple groups of random-access configuration parameters, allowing selection based on the number of transmit beams and thresholds to optimize random access, reducing interference and improving network access efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple RACH resource configuration and power ramp parameters are used, then device complexity is reduced, but random access efficiency deteriorates and processing delays increase
Solution Approach 1:
The patent segments the random access configuration into multiple groups of parameters (e.g., different power ramping configurations, different RACH resource sets) that can be independently selected based on beam characteristics. This allows the system to maintain simplicity by selecting from predefined groups while achieving improved efficiency through appropriate parameter selection for different beam scenarios.
Solution Approach 2:
The patent introduces dynamic parameter selection where the UE can choose different groups of random access parameters based on the quantity of transmit beams and channel conditions. This dynamic adaptation enables the system to optimize random access efficiency for different scenarios without requiring complex centralized control, resolving the contradiction between simplicity and efficiency.
2Reliability
If blind power ramp on candidate RACH resources is performed, then random access reliability is improved, but interference to neighboring cells increases
Solution Approach 1:
The patent applies local quality by configuring different power ramp parameters and RACH resources specifically for different beam directions and candidate RACH resources. Instead of uniform blind power ramping across all resources, the system tailors the power ramping behavior to local beam conditions, improving reliability for each beam while reducing unnecessary interference to neighboring cells from inappropriate beam transmissions.
Solution Approach 2:
The patent changes parameters such as power ramping step size, maximum power ramping iterations, and RACH resource selection based on beam quantity and channel conditions. By dynamically adjusting these parameters, the system achieves reliable random access when needed while minimizing interference by reducing power ramping activity in scenarios where beams are likely to cause neighboring cell interference.
3Productivity
If multiple groups of random-access configuration parameters are configured and selected based on beam quantity, then random access efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple groups of random access parameters with different characteristics (e.g., aggressive power ramping for good conditions, conservative for poor conditions) before the actual random access procedure. The UE simply selects from these pre-prepared groups based on beam quantity thresholds, avoiding complex real-time optimization while achieving improved efficiency through appropriate parameter matching.
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously select appropriate parameter groups based on its own beam quantity and channel conditions without requiring complex network control or coordination. The device serves itself by making intelligent parameter selections based on simple criteria, improving random access efficiency while keeping the overall system complexity manageable.
Data Source
AI summary
A random access method, user equipment, and a network device are provided to reduce interference to a neighboring cell. The method includes: receiving at least two groups of random-access configuration parameters from a network device, where each group of random-access configuration parameters includes a power adjustment step for retransmission of a random access preamble; selecting one group of random-access configuration parameters from the at least two groups of random-access configuration parameters based on a threshold; determining transmit power of the random access preamble based on a power adjustment step for retransmission of the random access preamble in the selected random-access configuration parameters; and sending the random access preamble to the network device at the transmit power.