Sidelink Capability Reporting for LTE-NR Band Combinations
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Solution Overview
Problem
In existing D2D communication systems, there is no specific method for terminal devices to report their capability information, particularly regarding frequency-band combinations, which hinders efficient sidelink communication.
Innovation Solution
A sidelink capability sending method and a terminal device are provided, which generate and send a capability-reporting message containing information about the terminal device's capabilities, including combinations of LTE PC5 and NR PC5 frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If no specific capability reporting method is implemented, then the system maintains simplicity, but the network cannot obtain terminal device capability information including frequency-band combination information
Solution Approach 1:
The capability information is segmented into different types (SL capability, frequency-band combination information, etc.) and reported through structured capability-reporting messages. This segmentation allows the network to obtain specific capability information while keeping the reporting mechanism organized and manageable.
Solution Approach 2:
The terminal device proactively reports its capability information including frequency-band combination information to the network before actual sidelink communication occurs. This preliminary action ensures the network has the necessary capability information for resource allocation and configuration without requiring complex on-demand querying mechanisms.
2Productivity
If detailed capability information including frequency-band combination information is reported, then the network can optimize sidelink communication, but the message size and processing complexity increase
Solution Approach 1:
The patent extracts and reports only the essential capability information elements needed for sidelink communication optimization, such as frequency-band combination information, supported codecs, and modulation schemes. By taking out only the necessary information elements, the message size is minimized while still enabling effective network optimization of sidelink resources and configurations.
Solution Approach 2:
The capability reporting mechanism uses parameter-based representation of frequency-band combinations and other capability elements. Instead of reporting detailed configuration data, the system reports compact parameter sets that define the terminal's capabilities, reducing message data volume while maintaining the information needed for productivity optimization.
3Reliability
If comprehensive capability reporting is implemented, then spectral efficiency can be improved, but the implementation complexity and standardization effort increase
Solution Approach 1:
The capability-reporting message structure is designed to be universal and multi-functional, supporting various types of capability information (SL capability, frequency-band combinations, codec support, modulation schemes) within a single standardized framework. This universality enables comprehensive capability reporting for improved spectral efficiency while avoiding the need for multiple separate reporting mechanisms, thereby reducing implementation complexity.
Solution Approach 2:
The standardized capability-reporting message acts as an intermediary structure that mediates between the terminal's diverse capabilities and the network's resource allocation requirements. This intermediary framework translates complex terminal capabilities into a standardized format that the network can efficiently process, reducing implementation complexity while enabling improved spectral efficiency through better resource matching.
Data Source
AI summary
A sidelink capability sending method, a sidelink capability receiving method, and a terminal device are provided. The sidelink capability sending method includes generating, by a terminal device, a capability-reporting message, the capability-reporting message including capability information of the terminal device, and the capability information including at least one of: a combination of Long Term Evolution (LTE) PC5 frequency bands; a combination of New Radio (NR) PC5 frequency bands; and a combination of LTE PC5 frequency bands and NR-PC5 frequency bands; and sending, by the terminal device, the capability-reporting message. In this way, the capability information of the terminal may be reported.