PUSCH Occasion Aggregation for Random Access
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low latency and increased reliability for random access procedures, particularly in supporting small data transmissions and spectral efficiency, due to limitations in channel capacity and robustness during two-step random access procedures.
Innovation Solution
The implementation of physical uplink shared channel occasion (PO) aggregation techniques in both time and frequency domains, allowing for flexible aggregation configurations based on signaling indications, slot formats, duplex modes, and UE location, to enhance spectral efficiency and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single PO transmission is used, then device complexity is low, but spectral efficiency is insufficient
Solution Approach 1:
The transmission resource is segmented into multiple Physical Uplink Shared Channel Occasions (POs) that are aggregated together. Instead of using a single PO, the system divides the transmission into multiple smaller PO units that can be independently configured and aggregated, thereby improving spectral efficiency while managing complexity through modular structure
Solution Approach 2:
The patent extends the PO structure from a single-dimensional resource allocation to multi-dimensional aggregation across time and frequency domains. By aggregating multiple POs in both time and frequency dimensions, the system achieves enhanced spectral efficiency without proportionally increasing device complexity
2Productivity
If PO aggregation in time and frequency domains is implemented, then spectral efficiency increases, but processing complexity increases
Solution Approach 1:
The aggregation configuration is made dynamic rather than static. The system can adaptively adjust the number and arrangement of aggregated POs in time and frequency domains based on channel conditions and traffic requirements, allowing efficient resource utilization without permanently increasing processing complexity
Solution Approach 2:
The patent changes key parameters such as the number of aggregated POs, their time-frequency positioning, and aggregation patterns based on system conditions. By dynamically adjusting these parameters, the system optimizes spectral efficiency while managing processing complexity through parameter optimization rather than structural complexity
3Power
If more POs are aggregated for data transmission, then data rate increases, but latency may increase due to aggregation overhead
Solution Approach 1:
The system performs preliminary configuration of PO aggregation parameters before actual data transmission. By pre-configuring aggregation patterns and resource allocations, the system prepares the transmission structure in advance, enabling high data rates without incurring additional latency from on-the-fly aggregation decisions
Solution Approach 2:
The patent ensures continuous utilization of aggregated PO resources for data transmission. By maintaining continuous transmission across aggregated time-frequency resources without idle gaps, the system achieves high effective data rates while minimizing latency overhead associated with resource switching and reconfiguration
Data Source
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AI summary
This disclosure describes methods, devices, and systems for techniques related to random access procedures, such as a two-step random access procedure. Generally, the described techniques support physical uplink shared channel (PUSCH) occasion (PO) aggregation in random access procedures, including aggregation configurations and communication schemes that support enhanced data transmissions, such as small data transmissions, in random access procedures. In some examples, the described techniques may include aggregating POs in a time domain, or a frequency domain, or both. A device, such as a user equipment (UE) may aggregate, in one or more of a time domain or a frequency domain, multiple POs of a set of POs, and transmit, to a device such as a base station, a random access payload of a random access message on a PUSCH using time and frequency resources of the aggregated multiple POs.