PUSCH-Linked PRACH Preamble Mapping for Variable Payloads
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Solution Overview
Problem
User Equipment (UE) faces challenges in selecting 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, especially when the payload size exceeds 208 bits, leading to inefficient resource allocation and reception issues.
Innovation Solution
A method and apparatus that utilize a mapping relationship between the resource configuration of the PUSCH resource and preamble sequence configuration information to determine the correct preamble sequence configuration, enabling accurate mapping and transmission on both PRACH and PUSCH resources, facilitated by a UE and base station interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE uses fixed preamble sequence configuration information, then the mapping process is simple, but the UE cannot adapt to different payload sizes and PUSCH resource configurations
Solution Approach 1:
The patent makes the preamble sequence configuration dynamic by allowing the UE to select different configuration information based on the actual payload size and PUSCH resource configuration. Instead of using a fixed configuration, the system now adapts the preamble sequence parameters (such as cyclic shift, length, and starting position) according to the specific transmission requirements, enabling the same PRACH resource to support multiple payload sizes efficiently
Solution Approach 2:
The patent changes key parameters of the preamble sequence configuration (cyclic shift, length, starting position) based on the payload size and PUSCH resource allocation. By dynamically adjusting these parameters, the system can accommodate different message sizes without requiring separate dedicated resources for each payload type, thus improving adaptability while maintaining reasonable complexity
2Productivity
If the UE selects preamble sequence configuration based on PUSCH resource configuration, then resource allocation efficiency improves, but the configuration selection process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-establishing mapping relationships between PUSCH resource configurations and corresponding preamble sequence configurations. The network can pre-configure multiple preamble sequence sets and their associated PUSCH resource mappings, allowing the UE to quickly select the appropriate configuration based on pre-defined rules without performing complex real-time calculations, thus improving resource allocation efficiency while limiting selection complexity
Solution Approach 2:
The patent introduces an intermediary mapping relationship that connects PUSCH resource configurations to preamble sequence configurations. This mapping acts as a bridge that simplifies the selection process: the UE first determines the PUSCH resource configuration based on payload size, then uses the pre-established mapping to select the corresponding preamble sequence configuration, avoiding direct complex configuration selection
3Measurement precision
If different payload sizes use different PUSCH resource configurations, then transmission accuracy improves, but the UE cannot map preamble sequences without corresponding configuration information
Solution Approach 1:
The patent applies universality by designing a unified preamble sequence configuration mechanism that serves multiple payload sizes and PUSCH resource configurations. Instead of requiring separate dedicated preamble configurations for each payload size, the system uses a set of configurable parameters (cyclic shift, length, starting position) that can be adjusted to support different transmission scenarios, making the preamble mapping process universally applicable across various payload sizes while maintaining transmission accuracy
Solution Approach 2:
The patent segments the preamble sequence configuration into independent adjustable parameters (cyclic shift, length, starting position). This segmentation allows the system to fine-tune specific parameters based on payload size requirements without redesigning the entire configuration structure. The UE can selectively adjust individual parameters to match different PUSCH resource configurations, making the mapping process more manageable and accurate
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.