Full-Duplex RACH Occasion Indication for Dynamic Resource Control
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Solution Overview
Problem
Existing wireless communication systems lack efficient methods for dynamically indicating the availability of resources for full duplex random access channel (RACH) occasions, leading to suboptimal resource utilization and interference in uplink and downlink communications.
Innovation Solution
Implementing dynamic signaling to configure and indicate the use of RACH resources, allowing UEs and base stations to transmit RACH messages based on real-time availability, thereby optimizing resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If static resource configuration is used for RACH occasions, then device complexity is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic indication of RACH occasion availability through downlink control information (DCI) messages. The base station can dynamically indicate whether a RACH occasion is available for uplink transmission by setting a specific field in the DCI message, allowing the system to adapt resource allocation in real-time based on downlink transmission needs, thereby improving resource utilization efficiency while maintaining manageable signaling complexity through standardized message formats.
2Productivity
If dynamic signaling is implemented for RACH resource indication, then resource allocation efficiency is improved, but interference between uplink and downlink deteriorates
Solution Approach 1:
The patent employs feedback mechanisms where the base station monitors channel conditions and interference levels, then uses DCI messages to dynamically control UE uplink transmissions. The base station can indicate RACH occasion availability based on real-time assessment of downlink transmissions and interference conditions, creating a closed-loop system that adapts to changing channel conditions and minimizes uplink-downlink interference while maintaining efficient resource allocation.
Solution Approach 2:
The patent prevents interference by proactively controlling UE transmissions through dynamic RACH occasion indication. Before interference can occur, the base station assesses the scheduling situation and uses DCI messages to prevent UEs from transmitting in RACH occasions that would cause interference with downlink transmissions. This preliminary anti-action approach blocks potential interference before it manifests, rather than attempting to mitigate it afterward.
3Productivity
If full duplex operation is enabled, then spectral efficiency is improved, but difficulty of detecting and measuring deteriorates
Solution Approach 1:
The patent segments the communication resources into distinct RACH occasions that are dynamically indicated as available or unavailable. By controlling which RACH occasions are active through DCI messages, the system creates clear temporal or frequency separations between uplink random access transmissions and downlink transmissions, reducing self-interference and making signal detection easier while still enabling full duplex operation to improve spectral efficiency.
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 configuration of a resource associated with a random access channel (RACH) message. The UE may receive an indication of whether the resource associated with the RACH message is permitted to be used for transmission of the RACH message, wherein the indication is included in a dynamic signaling communication. The UE may transmit the RACH message in accordance with the indication. Numerous other aspects are described.