Random Access PUSCH Allocation for PSD-Compliant Coverage
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Solution Overview
Problem
Wireless communication systems face challenges in complying with Maximum Power Spectral Density (PSD) regulations, leading to limitations in transmission power and coverage, particularly in 2-step random access procedures due to insufficient interlace resources and the need for enhanced signaling in uplink transmissions.
Innovation Solution
Implementing a flexible PUSCH resource allocation mode that includes full interlace, partial interlace, or non-interlace configurations, based on factors like payload size, downlink quality, channel occupancy, and device capabilities, to optimize resource allocation for random access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If 2-step random access procedure is implemented to reduce latency, then random access latency is reduced, but compliance with PSD regulations becomes difficult to achieve
Solution Approach 1:
The patent introduces a PUSCH resource allocation mode parameter that can be configured based on payload size, downlink quality, channel occupancy, and device capabilities. This parameter enables the system to adjust transmission characteristics to comply with PSD regulations while maintaining the low latency benefit of 2-step random access procedure.
Solution Approach 2:
The patent implements dynamic resource allocation by selecting different PUSCH resource allocation modes (full interlace, partial interlace, or non-interlace) based on real-time conditions such as payload size, downlink quality, channel occupancy, and device capabilities. This dynamic adaptation allows the system to maintain PSD compliance across varying operational conditions.
2Area of stationary object
If transmission power is increased to improve coverage, then coverage is improved, but PSD regulation compliance is violated
Solution Approach 1:
The patent uses PUSCH resource allocation mode as a parameter to control transmission characteristics. By selecting appropriate allocation modes (full interlace, partial interlace, or non-interlace) based on payload size, downlink quality, channel occupancy, and device capabilities, the system can maintain coverage while complying with PSD regulations.
Solution Approach 2:
The patent applies different resource allocation strategies to different transmission scenarios. Instead of using a uniform approach, the system adapts the PUSCH allocation mode locally based on specific conditions such as payload size, downlink quality, channel occupancy, and device capabilities, allowing optimized performance in each scenario.
3Productivity
If interlace resources are increased to improve RA capacity, then RA capacity is improved, but device complexity increases
Solution Approach 1:
The patent segments the PUSCH resource allocation into distinct modes (full interlace, partial interlace, non-interlace) that can be selectively applied. This segmentation simplifies the resource allocation process by providing discrete, manageable options rather than requiring complex continuous optimization, while still enabling improved RA capacity through appropriate mode selection.
Solution Approach 2:
The patent introduces partial interlace as an intermediate option between full interlace and non-interlace modes. This partial action approach allows the system to achieve some level of RA capacity improvement without always implementing the full complexity of complete interlace allocation, providing a balanced solution that avoids excessive device complexity.
Data Source
AI summary
Methods and apparatuses for random access procedure. A method at a terminal device comprises receiving information of a physical uplink shared channel (PUSCH) resource allocation mode from a network node. The PUSCH resource allocation mode includes at least one of interlace or non-interlace. The method further comprises transmitting a first message including a random access preamble and payload to the network node. The payload is transmitted on a PUSCH based on the PUSCH resource allocation mode.