Uplink Skipping Rules After Bandwidth Part Switching
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Solution Overview
Problem
Concurrent support of uplink skipping and BWP switching in wireless communications systems leads to ambiguity in UE behavior, resulting in potential desynchronization between the network entity and the UE due to unclear application of uplink skipping operations and successful BWP switching.
Innovation Solution
A framework is provided for determining whether to apply an uplink skipping operation after a BWP switch, where the UE decides based on scheduled reference signal transmission during a time interval, allowing for clear communication of successful BWP switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the network node applies uplink skipping operation after a BWP switch, then power consumption is reduced, but desynchronization between network entity and UE occurs
Solution Approach 1:
The patent introduces feedback mechanisms where the network entity monitors uplink transmissions and provides control information to the UE. The UE determines whether to apply uplink skipping based on feedback about scheduled reference signal transmissions, ensuring synchronization is maintained while enabling power-saving operations when appropriate.
Solution Approach 2:
The patent implements dynamic decision-making where the UE dynamically determines whether to apply uplink skipping on a per-time-interval basis. The skipping operation is dynamically adjusted based on whether reference signal transmissions are scheduled, allowing the system to adapt between power-saving mode and synchronization-maintaining mode as conditions change.
2Loss of time
If the network node skips uplink message transmission, then latency is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent applies partial skipping where the UE skips uplink message transmission only in specific time intervals when reference signals are scheduled, rather than continuously skipping. This partial application of the skipping operation reduces latency in critical scenarios while maintaining reliability through selective transmission when reference signals provide sufficient communication foundation.
3Adaptability or versatility
If the network node supports both uplink skipping and BWP switching, then system versatility is improved, but behavior ambiguity increases
Solution Approach 1:
The patent changes the parameter of decision-making criteria by introducing specific conditions based on scheduled reference signal transmissions. Instead of ambiguous behavioral choices, the UE follows clear parameter-based rules: check if reference signal is scheduled in the time interval, and accordingly determine whether to skip uplink transmission. This transforms behavioral ambiguity into parameter-driven deterministic decisions.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive first control information that enables the UE to skip transmission of a scheduled uplink message via an uplink skipping operation. The UE may receive second control information that requests the UE to switch an active BWP at the UE from a first BWP to a second BWP. The UE may receive third control information that schedules transmission of an uplink message at the UE during a time interval. Application of the uplink skipping operation to the uplink message may be based on the time interval being after the switch and whether the UE is scheduled to transmit a reference signal during the time interval. The UE may transmit, during the time interval and via the second BWP, a signal that is based on whether the UE applies the uplink skipping operation during the time interval.