Beam Management for Random Access Using Candidate Beam Indication
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Solution Overview
Problem
Wireless communication networks face challenges in beam management during random access procedures, particularly in scenarios where multiple UEs attempt to access the network simultaneously, leading to congestion, delays, and inefficient power consumption due to suboptimal beam selection and beam refinement processes.
Innovation Solution
The method involves detecting and indicating multiple candidate beams by a UE, allowing the base station to select the most suitable beam for communication, and using traffic information to intelligently select beams that minimize congestion and optimize resource allocation, while also employing beam refinement techniques to improve communication efficiency through precise beam pairing and sweeping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple candidate beams are indicated by a UE during random access, then beam selection accuracy is improved, but message overhead increases
Solution Approach 1:
The patent combines multiple beam indications into a single message by mapping multiple candidate beams to a single RACH occasion. This allows the UE to indicate multiple candidate beams (improving beam selection accuracy) while using only one uplink message (reducing message overhead), directly resolving the technical contradiction.
2Productivity
If beam refinement is performed to narrow the beam width, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent performs beam refinement during the random access procedure before正式 communication begins. By narrowing beams and establishing precise beam pairing early in the access process, the system achieves high communication efficiency for subsequent data transmission without adding complexity to the ongoing communication protocol.
Solution Approach 2:
The patent segments the beam management process into distinct phases: initial wide beam detection during random access, followed by beam refinement to narrow beams. This segmentation allows the system to achieve high communication efficiency through narrow beams while managing complexity by confining the refinement operations to specific access procedures rather than continuous operation.
3Productivity
If traffic information is used to select beams, then load balancing is improved, but information processing requirements increase
Solution Approach 1:
The patent enables UEs to autonomously select beams based on traffic information provided by the network. The base station broadcasts traffic information indicating beam load status, and UEs independently make beam selection decisions without requiring complex centralized coordination. This improves load balancing while keeping information processing requirements manageable by distributing the decision-making to individual UEs.
Data Source
AI summary
A method for random access in a communication network may include detecting a first candidate beam at a UE, detecting a second candidate beam at the UE, transmitting, from the UE, one or more first messages of a random access procedure, and indicating, by the one or more first messages, the first candidate beam and the second candidate beam. Another method for random access in a communication network may include detecting a first candidate beam at a UE, detecting a second candidate beam at the UE, receiving, at the UE, traffic information for the first candidate beam and the second candidate beam, selecting the first candidate beam based on the traffic information, and transmitting, based on the selecting, a first message of a random access procedure using the first candidate beam. The traffic information comprises load information.