Sidelink PDCP Control Information Path Selection
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Solution Overview
Problem
In 5G NR sidelink communications, the PDCP duplication mechanism introduces complexity in determining a unique transmission path for PDCP control information, especially when multiple RLC entities are involved.
Innovation Solution
A method for transmitting control information through a sidelink interface, where a sidelink communication receiving terminal receives configuration information from a sidelink communication transmitting terminal and determines a target RLC entity for transmitting PDCP control information, ensuring unique and timely transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication mechanism is adopted in 5G NR sidelink unicast transmission, then reliability of data transmission is improved, but complexity in determining transmission path for PDCP control information increases
Solution Approach 1:
The transmitting terminal determines the target RLC entity for PDCP control information in advance based on configuration information, and the receiving terminal configures multiple RLC entities beforehand for PDCP duplication. This preliminary configuration enables the receiving terminal to quickly identify the correct transmission path without complex real-time determination.
Solution Approach 2:
Configuration information acts as an intermediary between the transmitting and receiving terminals, carrying the identity of the target RLC entity. This intermediary mechanism simplifies the control information transmission by providing pre-negotiated path identification rather than requiring complex real-time path selection.
2Reliability
If multiple RLC entities are configured for PDCP duplication, then transmission reliability is improved, but difficulty in uniquely determining target RLC entity increases
Solution Approach 1:
The transmitting terminal determines the target RLC entity identity in advance and includes it in the configuration information sent to the receiving terminal. This preliminary determination eliminates the need for the receiving terminal to complexly identify the target RLC entity when control information arrives, as the identity is pre-specified.
Solution Approach 2:
The patent uses configuration information parameters to encode the target RLC entity identity, transforming the complex problem of RLC entity identification into a simple parameter matching problem. The receiving terminal only needs to compare the received configuration information with its pre-configured RLC entities to identify the target.
3Measurement precision
If configuration information is transmitted to identify target RLC entity, then transmission accuracy is improved, but information overhead increases
Solution Approach 1:
The patent encodes the target RLC entity identity using compact parameter representations in the configuration information. Instead of transmitting full RLC entity descriptions, it uses efficient parameter encoding that achieves accurate identification with minimal overhead.
Solution Approach 2:
The configuration information contains a reference or identifier that copies the essential identity information of the target RLC entity without duplicating the entire RLC entity configuration data. This copying approach maintains transmission accuracy while reducing information overhead.
Data Source
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AI summary
The present disclosure provides a method for transmitting control information through a sidelink interface through a sidelink interface, a terminal, and a storage medium, and relates to the technical field of wireless communications. The sidelink communication receiving terminal may receive configuration information transmitted from a sidelink communication transmitting terminal through the sidelink interface, and determine, for the SLRB with configured and/or activated PDCP duplication, according to the configuration information, a target RLC entity used when transmitting the PDCP control information to the sidelink communication transmitting terminal, thus, it may be ensured that the PDCP control information is transmitted to the sidelink communication transmitting terminal in time through an appropriate RLC entity, and it is ensured that a transmission path of the PDCP control information is unique in a case of the PDCP duplication when a PDCP corresponds to a plurality of RLC entities.