Terminal Resource Pool Selection for LBT-Compliant Unlicensed D2D
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Solution Overview
Problem
Device-to-device communication in higher frequency bands, particularly in unlicensed bands, requires compliance with regulations such as listen before talk (LBT) for channel access, which existing technologies have not adequately addressed.
Innovation Solution
A terminal is configured to identify and utilize a specific resource pool configuration in the unlicensed band by applying a specific value from a group of values, enabling effective D2D communication that adheres to regulatory requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication is performed in high frequency unlicensed band, then channel capacity is improved, but compliance with regulatory requirements (LBT) becomes more difficult to achieve
Solution Approach 1:
The patent applies parameter changes by selecting specific values from groups of configurable parameters (such as subchannel size, number of subchannels, and resource pool configuration) to ensure compliance with LBT regulations in unlicensed bands while maintaining high channel capacity for D2D communication
2Adaptability or versatility
If multiple parameter values are available for resource pool configuration, then system flexibility is improved, but device complexity increases due to need to select appropriate values for unlicensed band
Solution Approach 1:
The patent extracts and applies only the necessary specific parameter values from the available groups, filtering out unnecessary options to simplify device operation while maintaining the ability to comply with unlicensed band regulations
Solution Approach 2:
The patent performs preliminary configuration by pre-determining which parameter values should be applied for unlicensed band operation, eliminating the need for complex real-time selection and reducing device complexity
Data Source
AI summary
A terminal includes: a control unit configured to identify, based on a parameter specifying a resource in a frequency domain, a configuration of a resource pool in an unlicensed band; a reception unit configured to receive a signal from another terminal in the resource pool; and a transmission unit configured to transmit a signal to the another terminal in the resource pool, and, in this terminal, the control unit applies, to the resource pool, only a specific value in a group of values each capable of configuring the parameter.