Multi-Preamble Random Access for Multi-Beam Uplink Selection
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Solution Overview
Problem
User equipment (UE) without transmission-reception (Tx-Rx) correspondence capability struggles to determine its uplink beam in a multi-beam scenario, necessitating multiple preamble transmissions for random access, which is inefficient and resource-intensive.
Innovation Solution
A method for UE to determine whether to use multi-preamble transmission based on various criteria, including service type, enabled functions, UE type, and capabilities, and transmit preambles through acquired multi-preamble opportunities, optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE transmits multiple preambles to ensure base station reception in multi-beam scenario, then random access reliability is improved, but transmission resources are consumed
Solution Approach 1:
The patent changes the parameter of preamble transmission by introducing multi-preamble transmission opportunities with different time-frequency resources. The UE selects appropriate preambles based on beam parameters and transmission opportunities, optimizing the balance between reliability and resource consumption through parameter adjustment rather than fixed transmission patterns.
Solution Approach 2:
The patent implements dynamic preamble transmission where the UE adapts its transmission strategy based on current beam conditions, transmission opportunity availability, and service requirements. The system dynamically selects which preambles to transmit and when, rather than using a static transmission approach, thereby improving reliability while conserving resources.
2Reliability
If UE transmits multiple preambles through multi-preamble opportunities, then random access success rate is improved, but transmission time is increased
Solution Approach 1:
The patent applies preliminary action by having the UE prepare and select preambles in advance based on downlink beam measurements and transmission opportunity predictions. The UE determines the appropriate preamble transmission strategy before actual transmission, reducing trial-and-error iterations and minimizing the time required to achieve successful random access.
Solution Approach 2:
The patent implements feedback mechanisms where the UE monitors downlink beam signals and adjusts its preamble transmission strategy accordingly. Based on feedback from beam measurements and previous transmission outcomes, the UE optimizes its selection of preambles and transmission timing, improving success rate while reducing overall transmission time through iterative learning.
Data Source
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AI summary
The present disclosure relates to a random access method and device, user equipment, a base station and a computer-readable storage medium. The random access method includes: determining to initiate a random access; judging whether to use multi-preamble transmission; and when determining to use multi-preamble transmission, transmitting a preamble through an acquired multi-preamble transmission opportunity, so as to perform random access. In the embodiments of the present disclosure, whether current UE can use a multi-preamble transmission is determined by determining whether to use multi-preamble transmission, and if it is determined that the multi-preamble transmission can be used, the preamble is transmitted by means of the multi-preamble transmission opportunity, thereby saving the limited multi-preamble transmission resources.