Sidelink Radio Bearer Duplication With Dynamic Channel Allocation
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Solution Overview
Problem
The 5G NR V2X system's fixed association relationship between logical channel parameters for duplication transmission results in inflexible allocation of logical channels, leading to low utilization and reserved channels for sidelink interfaces, which affects the flexibility and efficiency of sidelink interface duplication transmission.
Innovation Solution
A method for sidelink interface duplication transmission that allows a network-side device to configure and control radio bearers of the sidelink interface through explicit or implicit indication information, enabling flexible activation or deactivation of duplication transmission based on terminal states and transmission parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed association relationship between logical channel parameters is used for duplication transmission, then the transmission reliability is improved, but the allocation flexibility of logical channels deteriorates
Solution Approach 1:
The patent introduces dynamic configuration of logical channel parameters through network-side signaling. Instead of a fixed association relationship, the network can dynamically adjust which logical channel parameters are associated with duplication transmission based on current network conditions and terminal requirements. This is achieved through configuration messages that allow flexible mapping of logical channel parameters to radio bearers for duplication transmission.
Solution Approach 2:
The patent enables changing the parameters of logical channels dynamically. The network can modify the association between logical channel parameters and radio bearers by sending configuration information to the terminal. This allows the system to adapt parameter mappings according to different transmission scenarios, improving both reliability through duplication transmission and flexibility in channel allocation.
2Reliability
If logical channels are reserved for duplication transmission, then the transmission reliability is improved, but the channel utilization deteriorates
Solution Approach 1:
The patent makes logical channels multi-functional by allowing them to serve both duplication transmission and other purposes. Through dynamic configuration, the same logical channel can be used for duplication transmission when needed, and reassigned to other functions when duplication is not required. This eliminates the need to reserve dedicated logical channels, improving overall channel utilization while maintaining reliability when duplication is activated.
Solution Approach 2:
The system dynamically allocates logical channels based on current transmission needs. When duplication transmission is required, the network configures appropriate logical channel parameters; when not required, these channels can be reallocated to other services. This dynamic approach prevents channel reservation and maximizes utilization across different network conditions.
Data Source
AI summary
Disclosed are a method for sidelink interface duplication transmission, a terminal, and a network-side device. The method includes: a terminal acquires duplication transmission configuration information of a sidelink interface; the terminal receives explicit instruction information or implicit instruction information transmitted by a network-side device and determines via the explicit instruction information or the implicit instruction information that at least one radio bearer of the sidelink interface activates or deactivates duplication transmission.