UE Uplink Slot Selection During SS/PBCH Overlap in Full Duplex
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Solution Overview
Problem
In full duplex (FD) operation of wireless communication systems, user equipment (UE) is restricted from performing uplink transmissions when synchronization signal/physical broadcast channel (SS/PBCH) blocks are transmitted, leading to inefficiencies in resource utilization and increased latency.
Innovation Solution
A method that allows UE to perform uplink channel transmissions, such as PUSCH/PUCCH repeats, by determining available slots that do not overlap with SS/PBCH reception symbols, enabling simultaneous FD operation without interfering with SS/PBCH measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE is restricted from performing uplink transmissions when SS/PBCH blocks are transmitted, then SS/PBCH measurement performance is maintained, but resource utilization efficiency deteriorates and latency increases
Solution Approach 1:
The patent applies local quality by allowing uplink transmissions only in specific frequency resources (uplink subbands) that do not overlap with downlink SS/PBCH transmissions within the same time slot. This enables spatial-frequency differentiation where different regions of the frequency spectrum have different transmission permissions, thereby maintaining measurement accuracy in downlink subbands while enabling productive uplink transmissions in uplink subbands.
Solution Approach 2:
The patent resolves the contradiction by introducing a frequency dimension differentiation within the same time domain. Instead of purely time-division multiplexing (restricting uplink to entire slots), the patent enables frequency-division multiplexing where uplink and downlink transmissions occur simultaneously in different frequency subbands within the same slot, thus maintaining measurement performance while improving resource utilization.
2Measurement precision
If UE is restricted from performing uplink transmissions when SS/PBCH blocks are transmitted, then SS/PBCH measurement performance is maintained, but transmission latency increases
Solution Approach 1:
The patent enables uplink transmissions in frequency regions local to the uplink subbands even during slots where SS/PBCH blocks are transmitted in downlink subbands. This localized permission approach reduces transmission latency for uplink data while maintaining measurement performance in downlink regions, as uplink transmissions no longer require waiting for entire slots to complete.
3Productivity
If full duplex operation is implemented allowing simultaneous downlink and uplink in same time resource, then resource utilization efficiency improves, but interference between downlink reception and uplink transmission occurs
Solution Approach 1:
The patent implements frequency-selective full duplex operation where downlink and uplink transmissions occur simultaneously in different frequency subbands within the same time slot. This spatial-frequency separation reduces mutual interference compared to uncontrolled full duplex, as each transmission type is confined to its designated frequency region, thereby enabling high resource utilization while managing interference.
Data Source
AI summary
Provided are a device operation method and a device in a wireless communication system. The device may be a terminal, a chipset, or a base station. When an uplink channel transmission symbol and a synchronization signal/physical broadcast channel (SS/PBCH) reception symbol overlap in a specific slot including a plurality of symbols in a time domain, the terminal determines whether uplink channel transmission is performed in the specific slot, and includes the specific slot among available slots for the uplink channel transmission on the basis of determining that the specific slot performs uplink channel transmission.