Network-Coordinated Sidelink Radio Bearer Configuration for Matched UEs
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Solution Overview
Problem
The configuration of sidelink radio bearers (SL RBs) at the receive end of user equipment (UE) often does not match the configuration at the transmit end, leading to low reliability in data transmission between UE devices.
Innovation Solution
A method and apparatus for configuring sidelink radio bearers (SL RBs) where a terminal device requests network device assistance to establish SL RBs, ensuring synchronized configurations at both ends by reporting QoS requirements and receiving SL RB radio resource configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UE at the receive end autonomously configures SL RB based on local QoS requirements, then the configuration process is simple and fast, but the SL RB configuration at the receive end does not match the configuration at the transmit end, resulting in low transmission reliability
Solution Approach 1:
The network device serves as an intermediary that coordinates SL RB configuration between transmit and receive ends. The network device receives QoS requirements from the transmit end, determines appropriate SL RB configuration parameters, and provides this configuration information to both ends, ensuring consistent configuration without requiring complex autonomous negotiation between UEs.
Solution Approach 2:
The transmit end feeds back QoS requirement information to the network device, which then determines the SL RB configuration. This feedback mechanism ensures that the configuration is based on actual service requirements while maintaining consistency across both ends through network-controlled distribution of the determined configuration.
2Adaptability or versatility
If UE at the transmit end and receive end use different SL RB configuration methods, then each end can optimize for its local requirements, but the configurations become inconsistent, leading to configuration mismatch
Solution Approach 1:
The network device ensures that both the transmit end and receive end receive the same SL RB configuration information, creating an equipotential state where both ends operate with identical configuration parameters. This eliminates configuration mismatches while still allowing each end to function independently with the standardized configuration.
3Productivity
If SL RB configuration is fully automated without network intervention, then the configuration speed is fast and resource consumption is low, but the ability to ensure configuration consistency between ends is reduced
Solution Approach 1:
The network device performs preliminary determination of SL RB configuration parameters based on QoS requirements before distributing the configuration to both ends. This preliminary action ensures that the configuration is optimized for the service requirements while maintaining consistency, and the actual configuration process at both ends is simply applying the pre-determined parameters, maintaining speed.
Data Source
AI summary
One example method includes sending, by a first terminal device, a first request message to a network device, where the first request message is used to request to establish a sidelink radio bearer (SL RB) between the first terminal device and a second terminal device, where the first request message includes at least one of a parameter index or at least one parameter. The first terminal device can then receive a first response message from the network device, where the first response message includes one or more of admission control indication information, the at least one parameter, the parameter index, or first SL RB radio resource configuration information, where the admission control indication information indicates that the network device allows establishment of the SL RB, and where the first SL RB radio resource configuration information includes at least one of an SL RB identifier or protocol layer configuration information.