RedCap UE PUSCH Repetition Around SS/PBCH Switching Gaps
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Solution Overview
Problem
Reduced-capability UEs (RedCap) face challenges in efficiently performing signal transmission and reception due to switching gaps, particularly in 5G and 6G wireless communication systems, which affect their ability to provide effective services.
Innovation Solution
A method and apparatus for RedCap UEs and base stations that involve identifying synchronization signal/physical broadcast channel (SS/PBCH) block positions and unavailable resources for physical uplink shared channel (PUSCH) repetition, allowing for efficient UL data transmission by avoiding resource overlap with SS/PBCH blocks and switching intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RedCap UEs perform signal transmission and reception in 5G/6G wireless communication systems, then service capability is provided, but switching gaps cause transmission inefficiency and resource waste
Solution Approach 1:
The base station preliminarily determines unavailable resources including switching gaps before UL data transmission, and notifies the UE in advance through indication information. This allows the UE to prepare and avoid transmitting data during switching gaps, eliminating transmission inefficiency caused by switching operations.
Solution Approach 2:
The base station acts as an intermediary by determining unavailable resources and conveying this information to the UE through indication information. This mediator role enables the UE to efficiently avoid switching gaps without requiring complex UE-side switching gap detection capabilities.
2Speed
If RedCap UEs transmit UL data without considering switching gaps, then transmission speed is maintained, but resource overlap with SS/PBCH blocks causes interference and transmission failure
Solution Approach 1:
The base station preliminarily determines unavailable resources including SS/PBCH block positions before UL data transmission, and notifies the UE in advance. This allows the UE to select transmission resources that do not overlap with SS/PBCH blocks, ensuring both transmission speed and reliability.
Solution Approach 2:
The base station provides feedback to the UE about unavailable resources through indication information. This feedback mechanism enables the UE to adjust its resource selection to avoid SS/PBCH block positions, preventing interference and transmission failures while maintaining transmission speed.
3Measurement precision
If RedCap UEs are equipped with full switching gap detection capability, then transmission accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The base station acts as an intermediary by performing switching gap detection and resource determination, then conveying results to the UE through simple indication information. This transfers the complex detection function from the UE to the base station, reducing UE hardware complexity while maintaining detection accuracy.
Solution Approach 2:
The base station serves itself by determining unavailable resources and managing switching gap coordination, eliminating the need for complex UE-side switching gap detection hardware. The UE simply follows base station instructions, reducing overall system complexity.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure relates to an operation of a RedCap UE and a base station in a wireless communication system. More specifically, the disclosure relates to an operation method of a RedCap UE considering a switching gap and an apparatus for performing the same. A method performed by a terminal in a communication system includes receiving, from a base station, information indicating positions of SS/PBCH blocks, identifying the positions of the SS/PBCH blocks based on the information, receiving, from the base station, configuration information on PUSCH repetition, identifying available resources for the PUSCH repetition by determining resources overlapped with the positions of the SS/PBCH blocks and switching intervals for the SS/PBCH blocks as unavailable resources for the PUSCH repetition, and repeatedly transmitting, to the base station, UL data on a PUSCH based on the available resources.