BWP Switch Time Gap Indication for Scheduling Delays
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently indicating a scheduling delay for shared channels during bandwidth part (BWP) switching, particularly in higher frequency bands where subcarrier spacing is greater and slot size is shorter.
Innovation Solution
The system introduces a time gap between a DCI message scheduling a shared channel and the actual transmission or reception of the shared channel, based on at least one time parameter associated with the BWP switch. This time gap is designed to accommodate the BWP switch delay and is indicated using a quantity of slots, allowing for efficient resource allocation even in higher frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a BWP switch is performed before shared channel communication in higher frequency bands, then the system can adapt to frequency-specific requirements, but the slot size becomes shorter and scheduling delay indication becomes less efficient
Solution Approach 1:
The patent changes the time parameter representation from absolute time values to slot-based indexing. The DCI message includes a time gap indicator that specifies a slot offset (K0 or K2) relative to the current slot, allowing flexible scheduling delays that adapt to different BWP configurations and frequency bands without requiring precise absolute timing indications.
2Ease of manufacture
If a fixed time gap is used for BWP switching, then implementation is simpler, but resource usage efficiency decreases due to unnecessary delays
Solution Approach 1:
The patent implements dynamic time gap adjustment by allowing the base station to flexibly select and indicate different slot offsets (K0 for downlink, K2 for uplink) based on actual BWP switch timing requirements. This dynamic indication in DCI messages enables the system to minimize delays while maintaining implementation simplicity through standardized signaling mechanisms.
3Reliability
If a longer time gap is used to accommodate BWP switch delay, then reliability of channel communication improves, but scheduling efficiency decreases
Solution Approach 1:
The patent applies preliminary action by indicating the time gap (slot offset) in advance within the DCI message that schedules the shared channel. The UE uses this pre-indicated time gap to prepare for the BWP switch and subsequent channel communication, ensuring reliable execution while maintaining scheduling efficiency through proactive timing information provision.
Data Source
AI summary
Methods, apparatuses, and computer readable media for indicating a time gap in case of a BWP switch are provided. A base station may transmit to a UE, and the UE may receive from the base station, an indication of a BWP switch from a first BWP to a second BWP. The UE and the base station may communicate with each other via a PDSCH or a PUSCH, in the second BWP based on a time gap. The time gap may be based on at least one of a first time parameter associated with the indication or a second time parameter associated with the BWP switch. The time gap may have a duration that is at least as long as a first duration of a BWP switch delay associated with switching from the first BWP to the second BWP.