PUSCH-PRACH Resource Mapping for 2-Step Random Access
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Solution Overview
Problem
User Equipment (UE) cannot select appropriate preamble sequence configuration information corresponding to the resource configuration of the Physical Uplink Shared Channel (PUSCH) resource during 2-step random access channel (RACH) or data transmission, leading to inefficient resource allocation and reception issues.
Innovation Solution
A method and apparatus that abide by a mapping relationship between the resource configuration of the PUSCH resource and preamble sequence configuration information, enabling the UE to determine and map the preamble sequence onto the Physical Random Access Channel (PRACH) resource, facilitating efficient resource selection and reception by the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE uses fixed preamble sequence configuration information, then the device complexity is reduced, but the adaptability to different PUSCH resource configurations deteriorates
Solution Approach 1:
The patent implements dynamic selection of preamble sequence configuration information based on PUSCH resource configuration. The UE determines the appropriate preamble configuration by mapping to the selected PUSCH resource configuration, allowing the system to adapt to different transmission scenarios (different payload sizes, different RRC states) while maintaining a finite set of configurable options, thus balancing complexity and adaptability
Solution Approach 2:
The patent changes the parameter of preamble sequence configuration from a fixed value to a dynamically selectable value based on PUSCH resource configuration parameters. By establishing a mapping relationship between PUSCH resource configuration and preamble sequence configuration, the system allows parameter adaptation without requiring complete reconfiguration, resolving the contradiction between fixed simplicity and dynamic adaptability
2Productivity
If the UE selects preamble sequence configuration corresponding to PUSCH resource configuration, then the resource allocation efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent pre-establishes a mapping relationship between PUSCH resource configuration and preamble sequence configuration. This preliminary setup allows the UE to quickly determine the appropriate preamble configuration by simply mapping to the selected PUSCH resource configuration, avoiding complex real-time calculations and reducing the actual operational complexity while maintaining high transmission efficiency
Solution Approach 2:
The patent introduces a mapping relationship as an intermediary between PUSCH resource configuration and preamble sequence configuration. This intermediary structure simplifies the selection process by providing a direct correspondence table, allowing the UE to efficiently determine preamble configuration without complex decision logic, thus improving productivity while managing device complexity
Data Source
AI summary
Provided are a data transmission method and apparatus, a user equipment, a base station, a communication system and a storage medium. The method includes abiding by a mapping relationship between the resource configuration of a physical uplink shared channel (PUSCH) resource and preamble sequence configuration information according to the resource configuration of the PUSCH resource and determining preamble sequence configuration information corresponding to the resource configuration of the PUSCH resource; mapping a preamble sequence onto a physical random access channel (PRACH) resource according to the preamble sequence configuration information; and sending a message containing the PRACH resource and the PUSCH resource.