Group-Common SPS Activation via DCI Feedback Process Field
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Solution Overview
Problem
Current wireless communication systems lack efficient methods for activating and releasing semi-persistent scheduling (SPS) configurations for group-common downlink shared channels, particularly in multicast/broadcast services, leading to inaccurate and inefficient configuration of user equipment (UEs) within the same multicast/broadcast services group.
Innovation Solution
The described techniques enable user equipment (UEs) to activate or release SPS configurations for group-common downlink shared channels based on signaling from a base station, using downlink control information (DCI) with a feedback process field, and transmit acknowledgment feedback, allowing for activation and release of SPS configurations via group-common or UE-specific downlink control channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If group-common transmissions are configured for multiple UEs, then communication efficiency is improved, but configuration accuracy and control precision deteriorate
Solution Approach 1:
The patent segments the control mechanism by introducing separate activation and release signaling procedures for group-common SPS configurations. The base station can independently activate or release SPS configurations for multiple UEs through dedicated DCI messages, allowing precise control over each UE's reception behavior while maintaining group-common transmission efficiency. This segmentation resolves the contradiction by enabling both group-level efficiency and individual-level accuracy.
2Productivity
If SPS configurations are activated for group-common channels, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where UEs send acknowledgment messages (ACK/NACK) in response to activation and release DCI messages. This feedback loop allows the base station to verify successful configuration deployment and trigger retransmission or correction if needed, thereby managing system complexity through structured communication protocols while maintaining high resource utilization through efficient SPS activation.
3Measurement precision
If activation and release signaling is implemented for SPS configurations, then control precision is improved, but signaling overhead increases
Solution Approach 1:
The patent designs the DCI format to serve multiple functions: it can activate SPS configurations, release SPS configurations, and carry acknowledgment feedback, all within a unified signaling framework. The same DCI structure is used for both activation and release operations, reducing the need for separate specialized messages and thereby controlling signaling overhead while maintaining precise control over SPS configuration states.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may activate or release one or more semi-persistent scheduling (SPS) configurations for group-common downlink shared channels based on signaling from a base station. For example, the UE may receive downlink control information (DCI) from the base station that includes a feedback process field, where a value of the feedback process field indicates at least one of one or more SPS configurations is to be activated. In some examples, the base station may transmit the DCI in a group-common downlink control channel or in a UE-specific downlink control channel. Additionally, the base station may transmit a deactivation message to the UE to indicate for the UE to release one or more activated SPS configurations, where the deactivation message is transmitted in a group-common downlink control channel or a UE-specific downlink control channel.