Terminal MCS Table Selection for Direct Communication
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Solution Overview
Problem
In terminal-to-terminal direct communication in NR systems, it is unclear how parameters specifying MCS are applied to multiple MCS tables, leading to challenges in configuring an appropriate code rate for effective communication.
Innovation Solution
A terminal is configured with a reception unit to receive MCS information, a control unit to determine the appropriate MCS table and code rate from the received information, and a communication unit to perform direct communication using the determined MCS, with the control unit setting upper and lower limits of available MCSs based on provided parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple MCS tables are configured for terminal-to-terminal direct communication, then the adaptability of modulation and coding schemes is improved, but the complexity of determining which MCS table to use increases
Solution Approach 1:
The patent applies parameter changes by introducing specific parameters (such as sl-MCS-Table-PSSCH and related indication parameters) that control which MCS table is selected. These parameters allow the system to dynamically switch between different MCS tables based on communication conditions, resolving the contradiction by providing a clear parameter-based selection mechanism that maintains adaptability while reducing determination complexity.
2Adaptability or versatility
If parameters specifying MCS are applied to multiple MCS tables, then the versatility of parameter usage is improved, but the clarity of parameter application becomes ambiguous
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of indication parameters that explicitly link the MCS parameters to the specific MCS table they should be applied to. This intermediary clarifies the application relationship, preventing information loss while maintaining the versatility of parameter reuse across different MCS tables.
3Adaptability or versatility
If the range of available MCSs is not clearly defined in multiple MCS tables, then the flexibility of MCS selection is improved, but the precision of code rate configuration deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the MCS parameter space into distinct segments for each MCS table, with clear boundary definitions. Each MCS table has explicitly defined ranges for available MCS indices, ensuring that while flexibility is maintained through multiple tables, the precision of code rate configuration is preserved through clear segmentation of the parameter space.
Data Source
AI summary
A terminal includes: a reception unit configured to receive information related to MCS (Modulation and coding scheme) applied to a terminal-to-terminal direct communication; a control unit configured to determine, in a case where a plurality of MCS tables are configured by the information, which MCS table is to be used, and to determine an MCS from the determined MCS table; and a communication unit configured to perform the terminal-to-terminal direct communication using the determined MCS, wherein the control unit determines an upper limit and a lower limit of available MCSs in the determined MCS table, based on a parameter included in the information.