Full-Duplex SSB Transmission for Uplink Self-Interference Control
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Solution Overview
Problem
Full-duplex communication systems face challenges with self-interference due to signal leakage between transmission and reception in the same frequency band, particularly when synchronization signal blocks (SSBs) overlap with uplink bands in full-duplex slots.
Innovation Solution
Base stations employ techniques such as muting, puncturing, frequency-shifting, or partitioning SSBs to ensure they are transmitted only in the downlink band of full-duplex slots, or adjust SSB transmission to avoid overlaps with uplink bands, while user equipment adjusts its uplink transmissions accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SSB transmission is performed in full-duplex slots overlapping with uplink bands, then communication flexibility and spectrum utilization are improved, but self-interference and signal reliability deteriorate
Solution Approach 1:
The patent segments the SSB transmission by dividing it into multiple parts (first SSB and second SSB) that can be transmitted in different slots. This allows the SSB to be split across downlink-only and full-duplex slots, maintaining transmission reliability while enabling flexible spectrum utilization. The segmentation principle resolves the contradiction by allowing partial transmission in flexible slots while ensuring critical portions are transmitted in reliable downlink-only slots.
Solution Approach 2:
The patent implements dynamic SSB transmission strategies where the network can adaptively configure SSB transmission in different slots based on traffic conditions and interference levels. The UE can dynamically select between receiving SSB in downlink-only slots or full-duplex slots with uplink bands, allowing the system to optimize between flexibility and reliability in real-time based on current network conditions.
2Reliability
If SSB transmission excludes uplink bands in full-duplex slots, then interference between SSB and uplink signals is reduced, but spectrum utilization and communication efficiency deteriorate
Solution Approach 1:
By segmenting SSB transmission into multiple parts across different slot types, the patent enables reliable transmission in downlink-only slots while utilizing full-duplex slots for additional SSB transmissions. This segmentation allows the system to maintain high communication reliability through careful slot selection while improving overall spectrum utilization by transmitting SSB in both downlink-only and full-duplex slots, thereby resolving the contradiction between reliability and efficiency.
Solution Approach 2:
The patent changes the transmission parameters of SSB by allowing different SSB parts to be transmitted with different configurations in different slots. The network can adjust the number of SSB parts, their locations, and transmission power based on network conditions, enabling the system to optimize both communication reliability and spectral efficiency by adapting transmission parameters to current full-duplex operation conditions.
3Productivity
If SSB transmission overlaps with uplink bands in full-duplex slots, then spectrum utilization is improved, but self-interference increases
Solution Approach 1:
The patent segments SSB transmission into multiple parts that can be distributed across different slot types. By transmitting some SSB parts in downlink-only slots and others in full-duplex slots, the system achieves better spectrum utilization while controlling self-interference through careful allocation. The segmentation allows the network to balance spectrum usage against interference levels by adjusting the distribution of SSB parts across different slot configurations.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network configures and signals SSB transmission patterns to UEs, acting as a mediator that coordinates between the conflicting requirements of spectrum utilization and interference management. The network determines optimal SSB transmission configurations and communicates them to UEs, enabling UEs to properly receive SSB while the network manages uplink transmissions to minimize self-interference, thus resolving the contradiction through centralized coordination.
Data Source
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AI summary
Methods related to wireless communication systems and transmission and/or reception of synchronization signal block (SSB) transmissions (e.g., in full-duplex slots) are provided. For example, a wireless communication device receives a synchronization signal block (SSB) transmission schedule. The SSB transmission schedule is at least partially overlapping with an uplink (UL) frequency portion of a full-duplex slot. The wireless communication device receives a first portion of a SSB in a downlink (DL) frequency portion of the full-duplex slot; and receiving a second portion of the SSB in the UL frequency portion of the full-duplex slot based on the SSB being scheduled in the full-duplex slot and at least partially overlapping with the UL frequency portion of the full-duplex slot.. Other features are also claimed and described.