Aggregated PUSCH Resource Units for Two-Step Random Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently handling variable payload sizes and modulation and coding schemes for random access messages, leading to suboptimal resource usage, reliability, and latency in random access procedures.
Innovation Solution
Aggregating multiple physical uplink shared channel (PUSCH) resource units based on payload size and modulation and coding scheme to transmit random access messages, using time and frequency resources across multiple occasions, ensuring consistent power and coding schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple PUSCH resource units are aggregated to support larger payload sizes, then the payload capacity is improved, but the resource allocation complexity increases
Solution Approach 1:
The PUSCH resources are divided into multiple discrete resource units that can be individually selected and aggregated. Each resource unit represents a separable allocation that can be combined based on payload requirements, making the complex resource allocation manageable through modular selection rather than continuous adjustment.
Solution Approach 2:
The system dynamically adjusts the number of PUSCH resource units aggregated based on the actual payload size and modulation and coding scheme requirements. This dynamic aggregation allows the resource allocation complexity to scale adaptively with the payload size rather than being fixed at a high level, optimizing the balance between capacity and complexity.
2Reliability
If multiple PUSCH resource units are aggregated to reduce modulation and coding scheme, then the transmission reliability is improved, but the transmission time increases
Solution Approach 1:
The system changes the modulation and coding scheme parameters based on the aggregated resource units. By adjusting these parameters to match the aggregated resource allocation, the system achieves more reliable transmission without unnecessarily extending transmission time, as the parameters are optimized for the actual resource availability rather than using fixed conservative settings.
3Productivity
If PUSCH resource units are aggregated across multiple occasions, then the resource usage efficiency is improved, but the scheduling complexity increases
Solution Approach 1:
The system performs preliminary aggregation of PUSCH resource units across multiple occasions before actual transmission scheduling. By pre-identifying and aggregating suitable resource units, the system improves resource usage efficiency while reducing the real-time scheduling complexity, as the aggregation decisions are made in advance based on predicted requirements rather than under time pressure.
Data Source
AI summary
This disclosure relates to methods, devices, and systems for wireless communications, and more particularly to aggregating physical uplink shared channel (PUSCH) resource units relating to a random access message. A user equipment (UE) may identify a random access message of a random access procedure. The random access message may include a random access preamble and a random access payload. The UE may aggregate multiple PUSCH resource units of a set of PUSCH resource units associated with one or more PUSCH occasions (POs) based on one or more of a payload size of the random access payload or a modulation and coding scheme associated with the random access payload. As a result, the UE may transmit the random access payload of the random access message on a PUSCH using time and frequency resources of the aggregated multiple PUSCH resource units over the one or more POs.