Dynamic SSB Slot Counting for Uplink Repetition Coordination
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Solution Overview
Problem
In wireless communications systems, dynamic updates to synchronization signal block (SSB) scheduling can cause interference and inefficient use of resources due to overlapping uplink and downlink transmissions, leading to decreased reliability and increased latency.
Innovation Solution
The UE receives control signaling for dynamic adaptation of SSB allocation, updating the set of slots for uplink repetition counting to efficiently utilize available resources by accounting for changes in SSB scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic updates to SSB scheduling are implemented, then resource utilization efficiency is improved, but interference between uplink and downlink transmissions increases
Solution Approach 1:
The patent implements dynamic SSB slot allocation where the network can update the set of slots allocated for SSB transmissions based on current system conditions. This dynamic adaptation allows the system to optimize resource utilization by adjusting SSB positions in real-time while maintaining clear separation between uplink and downlink transmissions, thereby preventing interference.
Solution Approach 2:
The patent employs feedback mechanisms where the network monitors the current SSB slot allocation and transmission patterns, then provides update indications to adjust the slot allocation. This feedback loop enables the system to respond to changing conditions and maintain optimal resource utilization while avoiding uplink-downlink interference by reallocating slots as needed.
2Reliability
If dynamic SSB slot allocation is used, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent divides the time domain into distinct slot structures with clear identification of which slots are allocated for SSB transmissions versus uplink transmissions. By segmenting the time resources and providing explicit allocation indicators, the system achieves reliable communication through structured resource separation while managing complexity through organized slot management rather than chaotic dynamic adjustments.
Solution Approach 2:
The patent performs preliminary allocation of SSB slots before uplink transmissions occur. The network provides update indications that establish the SSB slot allocation in advance, allowing UEs to plan their uplink transmissions accordingly. This preliminary action ensures reliable communication by preventing conflicts before they occur, rather than requiring complex real-time arbitration mechanisms.
3Loss of time
If SSB slot allocation is updated dynamically, then latency is reduced, but resource coordination difficulty increases
Solution Approach 1:
The patent introduces an intermediary indication mechanism where the network provides explicit update indications regarding SSB slot allocations. This intermediary signaling layer simplifies resource coordination by providing clear, standardized information about slot availability, allowing UEs to quickly determine which slots are free for uplink transmissions without complex coordination protocols, thereby reducing latency while managing coordination complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive first control signaling indicating a first set of slots allocated for one or more synchronization signal blocks (SSBs). A first set of candidate uplink slots for uplink repetition may be based on the first set of slots. The UE may receive second control signaling that indicates an update to the first set of slots allocated for the one or more SSBs resulting in a second set of slots allocated for the one or more SSBs. A second set of candidate uplink slots for uplink repetition may be based on the second set of slots. The UE may perform an uplink repetition counting procedure based on the second set of candidate uplink slots for uplink repetition.