Sidelink Semi-Persistent Resource Configuration via RRC Signaling
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Solution Overview
Problem
In scenarios involving cross-radio access type (RAT) scheduling, particularly where LTE user equipment interfaces schedule New Radio (NR) PC5 interfaces, the lack of support for Downlink Control Information (DCI) signaling makes it difficult to configure semi-persistent resources for sidelink communication.
Innovation Solution
The method involves a terminal acquiring configuration information for semi-persistent resources through Radio Resource Control (RRC) signaling, which includes time information for initial and retransmission resources, allowing the terminal to transmit data using these resources without relying on DCI signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DCI signaling is used to configure semi-persistent resources, then resource configuration is supported in NR system, but resource configuration cannot be implemented in cross-RAT scheduling scenarios where LTE Uu interface schedules NR PC5 interface
Solution Approach 1:
The patent introduces RRC signaling as an intermediary mechanism to enable resource configuration in cross-RAT scenarios. Instead of relying on DCI signaling which is not supported in LTE Uu interface scheduling, the system uses RRC signaling as a mediator to transmit configuration information between the network and terminal, thereby solving the incompatibility issue between LTE scheduling and NR sidelink resource configuration
Solution Approach 2:
The patent makes RRC signaling serve multiple functions: it not only handles traditional radio resource control but also enables semi-persistent resource configuration for sidelink communication. This multi-functional approach allows the same signaling mechanism to work across different RAT scenarios, providing universal resource configuration capability without requiring separate mechanisms for each mode
2Productivity
If DCI signaling is not supported in cross-RAT scheduling, then LTE Uu interface can schedule NR PC5 interface, but semi-persistent resource configuration becomes difficult to implement
Solution Approach 1:
RRC signaling acts as a reliable intermediary that ensures proper resource configuration in cross-RAT scenarios. By using RRC signaling instead of DCI signaling, the system maintains configuration reliability through the more robust and standardized RRC protocol, which is specifically designed for control signaling and configuration purposes
3Adaptability or versatility
If semi-persistent resources are configured without DCI signaling, then cross-RAT scheduling is enabled, but configuration information transmission becomes more complex
Solution Approach 1:
The patent extends RRC signaling to handle both traditional Uu interface resource control and NR PC5 sidelink resource configuration. By making RRC signaling universal, the system ensures that all necessary configuration information can be transmitted through a single reliable channel, preventing information loss while maintaining cross-RAT scheduling capability
Solution Approach 2:
The patent performs preliminary resource configuration through RRC signaling before actual data transmission occurs. By pre-configuring semi-persistent resources using RRC signaling, the system establishes all necessary parameters and timing information in advance, ensuring that configuration information is complete and ready for subsequent transmission operations
Data Source
AI summary
A resource configuration method and apparatus, a terminal, and a non-transitory storage medium. The method includes: a terminal obtains configuration information, sent by a network side entity by means of radio resource control (RRC) signaling, of semi-persistent resources (S702), wherein the configuration information is used for indicating at least one of the following information: time information of retransmission resources, time offset position information of the retransmission resources with respect to initial transmission resources, time information of the initial transmission resources, the time information of the initial transmission resources associated with the retransmission resources; and the terminal performs, on the basis of the configuration information, data transmission by using the semi-persistent resources (S704).