Random Access Resource Mapping for Flexible Two-Step RA
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Solution Overview
Problem
Existing wireless communication networks face challenges in efficiently configuring and performing random access procedures, particularly in two-step RA procedures, due to issues with resource allocation and beam management, leading to suboptimal performance and resource utilization.
Innovation Solution
A method and apparatus for flexible resource configuration in RA procedures, allowing adaptive association between synchronization signals and physical random access channels, enabling efficient mapping of preambles to PUSCH resources, thereby improving resource utilization and reducing beam collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed association between SSB and PRACH occasion is used for RA procedure, then the configuration is simple and reliable, but the flexibility and adaptability of resource configuration is reduced
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed static association between SSB and PRACH occasion to a dynamic adaptive association mechanism. The network node can flexibly configure the association relationship based on current network conditions and terminal device requirements, allowing the system to adapt to varying operational scenarios while maintaining manageable configuration complexity through automated determination rules.
2Adaptability or versatility
If adaptive association configuration is implemented for RA procedure, then the flexibility and diversity of resource configuration is improved, but the configuration complexity and processing overhead increase
Solution Approach 1:
The patent applies parameter changes by enabling the network node to modify association parameters dynamically. Instead of using a fixed association mapping, the system allows flexible configuration of which SSB is associated with which PRACH occasion based on configurable parameters such as time resources, frequency resources, and beam directions. This enables diverse resource configuration scenarios while the network node manages the complexity through standardized parameter modification procedures.
3Productivity
If flexible mapping of SSB to PUSCH RU is allowed, then the resource allocation efficiency and beamforming performance is improved, but the signaling transmission complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the RA procedure into distinct configurable components: SSB selection, PRACH occasion mapping, and PUSCH RU allocation. Each component can be independently configured and optimized. The association relationship is segmented into manageable mapping rules that the network node can apply systematically, reducing the perceived complexity of the overall signaling transmission while enabling flexible and efficient resource allocation across different beam directions and time-frequency resources.
Data Source
AI summary
A method for random access which may be performed by a terminal device comprises receiving configuration information for a random access procedure from a network node. The method further comprises determining an association between random access resource and shared channel resource for the random access procedure, according to the configuration information. The association is based at least in part on a configuration of the shared channel resource. An association between signaling transmissions in a random access procedure can be configured flexibly and efficiently.