Multi-Panel PRACH Occasion Configuration for Flexible Access
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in random access channel occasion configuration due to analog beam restrictions and lack of flexibility in multi-panel communication, leading to reduced throughput and increased latency for user equipment accessing network nodes.
Innovation Solution
The proposed solution involves configuring random access channel resources across multiple panels of a network node, allowing for flexible association of synchronization signal blocks with PRACH resources based on the number of usable panels, using techniques such as frequency division multiplexing, root-based splits, or cyclic shift-based splits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PRACH resources are configured for multi-panel communication, then communication flexibility and throughput are improved, but resource allocation complexity increases
Solution Approach 1:
The PRACH resources are segmented into multiple panels, where each panel can be independently configured and activated. The network can selectively enable certain panels based on channel conditions and UE capabilities, allowing flexible resource allocation without requiring complex configuration for all possible panels simultaneously.
Solution Approach 2:
The PRACH resource configuration is made dynamic through network control, where the network can activate or deactivate specific panels based on real-time channel conditions, UE mobility state, and load requirements. This dynamic activation approach simplifies resource allocation by only managing active panels rather than all possible panels.
2Reliability
If multiple panels are used for PRACH communication, then communication reliability is improved, but device complexity increases
Solution Approach 1:
Multiple panels are configured with universal PRACH resource structures, where each panel follows the same resource allocation patterns and procedures. This universality allows UEs to handle multiple panels using standardized protocols, reducing device complexity while maintaining reliability through diverse panel usage.
Solution Approach 2:
Different panels can be assigned different quality characteristics based on their specific channel conditions and coverage areas. The network can configure certain panels for high-reliability scenarios while others serve different purposes, allowing reliability improvement without uniformly increasing complexity across all panels.
3Loss of time
If PRACH resources are optimized for multi-panel scenarios, then access latency is reduced, but configuration complexity increases
Solution Approach 1:
PRACH resources are pre-configured across multiple panels during initial network setup, with resource allocations prepared in advance for different panel scenarios. This preliminary configuration allows UEs to immediately utilize available panels without complex real-time configuration, reducing access latency while managing configuration complexity through advance preparation.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a physical random access channel (PRACH) resource allocation, of a set of PRACH resources, associated with a synchronization signal block (SSB), of a set of SSBs. The UE may identify a quantity of panels usable for communication in a PRACH procedure. The UE may transmit a communication using an SSB beam associated with the SSB in a PRACH resource of the set of PRACH resources that are configured in accordance with the quantity of panels usable for communication in the PRACH procedure. Numerous other aspects are described.