PRACH Beam Configuration for Wireless Random Access
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Solution Overview
Problem
Current wireless communication systems face challenges in performing efficient random access procedures between user equipment and base stations, especially when signals are transmitted and received through multiple beams, which can lead to interference and increased execution time for 'Tx/Rx reciprocity' unestablished user equipment.
Innovation Solution
The method involves configuring user equipment to transmit Physical Random Access Channel (PRACH) using a maximum number of simultaneously transmittable beams or repetition count allowed, allowing for adaptive and differential penalties to reduce interference and optimize random access execution time by using the same or different resources for beam transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If user equipment transmits PRACH using multiple beams simultaneously, then random access execution time is reduced, but interference to adjacent base stations increases
Solution Approach 1:
The patent applies local quality by differentiating the treatment of beams based on their spatial characteristics. The base station configures different maximum beam numbers for different spatial regions or beam directions, allowing closer beams to be limited more strictly while farther beams can have higher transmission counts. This localized differentiation resolves the contradiction by enabling multi-beam transmission in certain regions while controlling interference in adjacent regions.
Solution Approach 2:
The patent implements dynamics through adaptive configuration where the base station dynamically adjusts the maximum number of allowable beams based on real-time channel conditions and spatial relationships. The configuration information can be updated based on current network state, allowing the system to flexibly balance between reducing access time and controlling interference as conditions change.
2Reliability
If user equipment transmits PRACH using more beams, then connection reliability improves, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure and provide configuration information about the maximum number of allowable beams before the random access procedure begins. This advance configuration eliminates the need for real-time complex calculations and decisions at the user equipment, reducing device complexity while maintaining reliable multi-beam transmission capabilities.
Solution Approach 2:
The patent implements feedback mechanisms where the base station receives configuration information about beam transmission and can provide feedback through random access responses. This feedback loop allows the system to adjust beam management parameters dynamically, improving connection reliability while keeping user equipment complexity manageable through network-side coordination.
Data Source
AI summary
Disclosed are a method for performing a random access procedure between a terminal and a base station in a wireless communication system and a device supporting the same. More particularly, the present invention provides a description of a method for performing a random access procedure between a terminal and a base station in a wireless communication system capable of transmission or reception of a signal through a plurality of beams. The terminal is capable of communicating with at least one of another terminal, a terminal related to an autonomous driving vehicle, the base station or a network.