Sidelink Semi-Persistent Scheduling Configuration Management
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Solution Overview
Problem
There is a need for supporting multiple semi-persistent scheduling (SPS) configurations for SPS scheduling in vehicle-to-everything (V2X) communication, as well as for activation, deactivation, and resource allocation for individual SPS configurations among multiple SPS configurations.
Innovation Solution
A method is provided to support multiple SPS configurations for SPS scheduling in V2X communication, including activation, deactivation, and resource allocation for individual SPS configurations. This method involves configuring multiple SPS configurations for a user equipment (UE) and managing their activation and deactivation through specific control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SPS configurations are supported for V2X communication, then communication performance and resource allocation flexibility are improved, but system complexity and control overhead increase
Solution Approach 1:
The patent segments the SPS configuration management by introducing separate configuration indices (first SPS configuration index and second SPS configuration index) to identify and manage different SPS configurations independently. This allows the system to handle multiple SPS configurations through structured segmentation of configuration parameters and control information
Solution Approach 2:
The patent creates a universal control mechanism where a single downlink control information (DCI) format can activate or deactivate any configured SPS configuration by including the appropriate configuration index. This multi-functional approach allows the same control channel to manage multiple SPS configurations without requiring separate control channels for each configuration
2Productivity
If individual activation and deactivation of SPS configurations is enabled, then resource allocation efficiency is improved, but control signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple SPS configurations and their indices before activation. The network configures the SPS configurations and communicates the configuration indices to the UE in advance, so that when activation or deactivation is needed, only a compact DCI with the pre-assigned index needs to be transmitted, rather than re-transmitting full configuration parameters
Solution Approach 2:
The patent uses copying by referencing the pre-configured SPS configuration through its index stored in the UE. Instead of transmitting the entire SPS configuration parameters again, the system transmits a compact copy identifier (the configuration index) that points to the full configuration already stored in the UE, significantly reducing signaling overhead
Data Source
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AI summary
A communication system configures a plurality of sidelink (SL) Semi-Persistent Scheduling (SPS) for a user device. In some embodiments, a method includes generating, by a base station, SL SPS configuration information for the user device, wherein the SL SPS configuration information comprises: an SL SPS radio network temporary identifier (RNTI) for the user device; and SL SPS index information to indicate a plurality of SL SPS configurations for the user device. The method further includes configuring a radio resource control (RRC) message comprising the SL SPS configuration information and transmitting, by the base station and to the user device, the RRC message.