Sidelink Synchronization Carrier Frequency Segmentation
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Solution Overview
Problem
Current sidelink communication technologies face challenges in ensuring reliable and efficient transmission of synchronization information across multiple carrier frequencies, particularly in scenarios with limited transmission capabilities and varying communication conditions, leading to inefficiencies and power consumption issues.
Innovation Solution
A method where a terminal device configures and prioritizes the transmission of sidelink synchronization information on specific carrier frequencies based on conditions such as the availability of candidate synchronization carrier frequencies, measured RSRP, and communication types, ensuring that each peer terminal device receives synchronization information on at least one carrier frequency, even when the list of candidate synchronization carrier frequencies is not pre-configured or includes frequencies not used for sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink synchronization information is transmitted on all configured carrier frequencies, then reliability of synchronization information reception is improved, but power consumption increases
Solution Approach 1:
The patent segments the set of configured carrier frequencies into two groups: a first set of carrier frequencies for transmitting sidelink synchronization information, and a second set of carrier frequencies for other sidelink communications. This segmentation allows the terminal device to transmit synchronization information selectively on only the first set of frequencies rather than all configured frequencies, thereby reducing power consumption while maintaining reliable synchronization for peer devices that monitor the designated frequencies.
Solution Approach 2:
The patent applies local quality by assigning different functions to different carrier frequencies based on their characteristics and usage patterns. Specifically, certain carrier frequencies are designated with the special quality of being synchronization carrier frequencies optimized for transmitting synchronization information, while other frequencies maintain their general-purpose communication function. This localized optimization ensures reliable synchronization transmission on designated frequencies without requiring all frequencies to be used for synchronization purposes.
2Adaptability or versatility
If sidelink synchronization information is transmitted on multiple carrier frequencies, then coverage and accessibility are improved, but device complexity increases
Solution Approach 1:
The patent segments carrier frequencies into distinct functional groups (synchronization carrier frequencies versus other carrier frequencies), allowing the system to achieve wide coverage by transmitting on multiple frequencies while managing complexity through clear segmentation. Peer terminal devices can be configured to monitor specific synchronization carrier frequencies, reducing their complexity while maintaining broad coverage through the distributed frequency approach.
Solution Approach 2:
The patent introduces dynamic configurability where the network can configure which carrier frequencies serve as synchronization carrier frequencies based on communication conditions, terminal capabilities, and service requirements. This dynamic assignment allows the system to adapt to varying coverage and accessibility needs without hardcoding complex multi-frequency transmission logic in each device, thereby managing device complexity while maintaining versatility.
3Adaptability or versatility
If sidelink synchronization information is transmitted on carrier frequencies not used for sidelink communication, then synchronization coverage is improved, but loss of information increases
Solution Approach 1:
The patent segments carrier frequencies into those used for sidelink communication and those not used for sidelink communication, and further identifies which frequencies from each segment should serve as synchronization carrier frequencies. This segmentation enables the system to transmit synchronization information on frequencies that may not carry data traffic, improving synchronization coverage for devices that may be active only on specific frequencies, while the structured approach prevents information loss through proper configuration and monitoring.
Data Source
AI summary
The present disclosure provides a method in a terminal device configured with a plurality of carrier frequencies for sidelink communication with a plurality of peer terminal devices. The method includes: transmitting, to each of the plurality of peer terminal devices, sidelink synchronization information on at least one carrier frequency for sidelink communication with the peer terminal device.