PUSCH Repetition Request in RACH Procedure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing physical uplink shared channel (PUSCH) repetitions during radio resource control (RRC) connection requests in random access channel (RACH) procedures, particularly due to coverage limitations and resource wastage in scheduling PUSCH repetitions for UEs with adequate coverage.
Innovation Solution
The system allows user equipment (UE) to request and transmit PUSCH repetitions using specific alternate frequency resources to communicate PUSCH repetition information to the base station, enabling efficient scheduling based on actual coverage needs, rather than relying on conventional data signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUSCH repetitions are scheduled for all UEs during RRC connection requests, then coverage is improved for UEs with coverage limitations, but resources are wasted for UEs with adequate coverage
Solution Approach 1:
The patent applies parameter changes by introducing a new parameter (PUSCH repetition request indicator) that allows UEs to dynamically indicate their coverage status. This enables the base station to adaptively adjust PUSCH repetition scheduling parameters based on actual UE needs, transitioning from a static all-or-nothing approach to a dynamic conditional approach that optimizes both coverage and resource efficiency
Solution Approach 2:
The patent implements dynamics by making PUSCH repetition scheduling adaptive rather than static. The base station dynamically decides whether to schedule PUSCH repetitions based on the UE's indicated coverage status. This dynamic adjustment allows the system to provide enhanced coverage when needed while avoiding resource wastage when not needed, resolving the contradiction between reliability improvement and energy loss
2Ease of manufacture
If conventional data signaling is used to communicate PUSCH repetition information, then resource allocation is straightforward, but signaling overhead increases and efficiency decreases
Solution Approach 1:
The patent merges the PUSCH repetition request indication with the existing random access procedure by embedding the indicator in the PRACH message or associated uplink transmission. This consolidation eliminates the need for separate dedicated signaling messages, thereby reducing signaling overhead while maintaining straightforward resource allocation through the existing random access resource framework
Solution Approach 2:
The patent applies universality by making the existing random access resources serve dual purposes: both for initiating random access and for conveying PUSCH repetition request information. This multi-functionality allows the system to communicate coverage status information using already-allocated resources, avoiding additional signaling overhead while preserving scheduling simplicity
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, a request for physical uplink shared channel (PUSCH) repetition associated with a radio resource control (RRC) connection request message of a random access channel (RACH) procedure. The UE may transmit at least one PUSCH repetition associated with the RRC connection request message based at least in part on the request. Numerous other aspects are described.