RRC Message Configuration for UE-to-Network Relaying
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing radio resource allocation for UE-to-Network relaying, particularly in supporting UE autonomous resource selection and network scheduling for sidelink communication, which affects data transmission and reception in scenarios where direct network access is not available.
Innovation Solution
The method involves a network node establishing a Radio Resource Control (RRC) connection with a remote UE via a relay UE, transmitting an RRC message that includes configurations for UE autonomous resource selection while excluding configurations for network scheduling, and receiving a complete RRC message from the remote UE, facilitating sidelink communication through sidelink RLC bearers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network node includes both UE autonomous resource selection configuration and network scheduling configuration in the first RRC message, then the remote UE can flexibly adapt to different sidelink communication scenarios, but the message size and configuration complexity increase
Solution Approach 1:
The patent segments the sidelink resource allocation configuration into two separate fields: one for UE autonomous resource selection and another for network scheduling. This allows the network node to selectively include only the necessary configuration type in the first RRC message, reducing message complexity while maintaining adaptability for different sidelink scenarios.
Solution Approach 2:
The patent implements dynamic configuration selection where the network node determines which configuration type (autonomous or network-scheduled) to include based on the specific sidelink communication scenario. This dynamic approach allows the system to adapt to different requirements without permanently increasing message complexity.
2Ease of operation
If the network node allows UE autonomous resource selection for sidelink communication, then the remote UE can transmit data independently without network scheduling, but the network loses control over resource allocation efficiency
Solution Approach 1:
The patent enables dynamic switching between autonomous resource selection and network-scheduled resource allocation based on scenario requirements. The network node can configure UE autonomous resource selection for scenarios requiring rapid response, while maintaining the option to use network scheduling for scenarios requiring optimized resource utilization.
Solution Approach 2:
The patent implements self-service capability where the remote UE can autonomously select and allocate sidelink resources without network intervention when configured to do so. This allows the UE to independently handle resource allocation in scenarios where network control is not available or not required.
3Reliability
If the network node establishes RRC connection and transmits full configuration messages to remote UE via relay UE, then the remote UE can be configured for sidelink communication, but the signaling overhead and transmission delay increase
Solution Approach 1:
The patent extracts only the essential sidelink resource allocation configuration from the full RRC message and includes it in the first RRC message transmitted via the relay UE. This extraction approach reduces the message size and transmission delay while maintaining the reliability of the critical configuration parameters.
Solution Approach 2:
The patent segments the RRC message transmission into phases, with the first RRC message containing critical sidelink configuration parameters. This segmentation allows the most time-sensitive configuration data to be transmitted first, reducing overall delay while ensuring reliable delivery of essential parameters.
Data Source
AI summary
A method and device are disclosed for radio resource allocation to support User Equipment-to-Network (UE-to-Network) relaying. The network node establishes a Radio Resource Control (RRC) connection with a remote UE via a relay UE. The network node transmits a first RRC message to the remote UE via the relay UE, wherein the first RRC message includes a Uu radio bearer configuration and a Sidelink (SL) Radio Link Control (RLC) bearer configuration associated with a data radio bearer (DRB) or a signalling radio bearer (SRB) and wherein the network node is allowed to include a first field used to indicate a configuration for UE autonomous resource selection for sidelink communication transmission in the first RRC message and the network node is not allowed to include a second field used to indicate a configuration for UE to transmit sidelink communication based on network scheduling in the first RRC message.