Terminal Uplink Band Selection for Three- and Four-Band Tx Switching
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Solution Overview
Problem
Existing technologies face ambiguity in selecting appropriate band combinations for uplink transmission when multiple bands are used, leading to multiple candidate combinations, which complicates the implementation of UL Tx switching schemes across three or four bands.
Innovation Solution
A terminal and base station system that includes a transmitting unit and a control unit to determine a specific band combination from multiple candidates based on a predefined rule, enabling clear selection and execution of UL Tx switching schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of bands for UL transmission is increased to three or four, then the data transmission capacity and system performance are improved, but the number of band combination candidates increases, leading to ambiguous state issues and complexity in selection
Solution Approach 1:
The patent changes the parameter of band combination selection from multiple candidates to a single determined combination by establishing specific determination rules based on transmission port instructions and band characteristics, thereby resolving the ambiguity while maintaining support for three or four bands
Solution Approach 2:
The system uses the transmission port instruction information that is already available in the communication process to self-determine the band combination, eliminating the need for additional signaling or complex external coordination for band selection
2Adaptability or versatility
If multiple band combination candidates are assumed, then more transmission options are available, but the ambiguous state issue prevents appropriate execution of UL Tx switching schemes
Solution Approach 1:
The patent transforms the state from multiple ambiguous candidates to a single determined band combination by applying determination rules that consider transmission port instructions and band characteristics, ensuring reliable UL Tx switching execution
Solution Approach 2:
The patent performs preliminary determination of the band combination based on transmission port instructions before actual UL transmission, preventing ambiguity during the transmission process and ensuring reliable switching scheme execution
Data Source
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AI summary
A terminal includes a transmitting unit that performs uplink transmission using N (where N is a natural number equal to or less than M) bands selected from among M (where M is a natural number equal to or greater than 3) bands, and a control unit that, in a case where an instruction for transmission at one port is given and candidates of two or more band combinations are assumed, determines a band combination from among the two or more band combinations on the basis of a specific rule.