Base Station Indication of Skipped Data Channel Occasions
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Solution Overview
Problem
In wireless communication systems, semi-persistent scheduling (SPS) configurations can result in wasted power and interference due to the need for user-equipment (UE) to monitor and acknowledge data channels that are not transmitted, as the base station (BS) does not provide prior indication of skipped data channel occasions.
Innovation Solution
The BS indicates to the UE whether a data channel will be skipped through demodulation reference signals, allowing the UE to forgo monitoring and acknowledgement transmission, thereby reducing power consumption and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistent scheduling is used to allocate data channels, then resource allocation efficiency is improved, but power consumption increases due to monitoring and acknowledging non-transmitted channels
Solution Approach 1:
The base station performs preliminary action by transmitting an indication signal in advance to notify the UE about skipped data channel occasions before the actual data transmission time. This allows the UE to proactively stop monitoring and processing for those occasions, avoiding wasted power consumption while maintaining the semi-persistent scheduling framework for efficient resource allocation.
2Productivity
If semi-persistent scheduling is used to allocate data channels, then resource allocation efficiency is improved, but interference increases due to unnecessary acknowledgement transmissions
Solution Approach 1:
The base station transmits an indication signal in advance to notify the UE about skipped data channel occasions. This preliminary notification allows the UE to skip acknowledgement transmissions for those occasions, eliminating unnecessary interference on the uplink control channel while preserving the efficient resource allocation benefits of semi-persistent scheduling.
3Reliability
If the UE monitors all scheduled data channels, then data reception reliability is maintained, but processing overhead increases due to handling non-transmitted channels
Solution Approach 1:
The base station sends a preliminary indication signal to inform the UE about skipped data channel occasions before the actual data transmission. This allows the UE to selectively skip monitoring and processing for those occasions without compromising data reception reliability for actually transmitted channels, thereby reducing processing overhead and device complexity.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for indicating unoccupied data channel occasions for semi-persistent scheduling of wireless data communications. One aspect provides a method for wireless communication by a user-equipment (UE). The method generally includes: receiving, from a base station (BS), scheduling of resources for reception of multiple data channels; determining, based on a resource for a first data channel of the multiple data channels, an indication of whether transmission of at least a second data channel of the multiple data channels will be skipped; and taking one or more actions associated with communication with the BS in accordance with the indication.