Antenna-Aware UL Carrier Selection for Coverage and Delay
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently selecting between primary UL carriers and SUL carriers due to differences in frequency and signal quality, leading to suboptimal uplink transmission performance and increased transmission delays.
Innovation Solution
A method and apparatus that determine a decision parameter based on the antenna structure of a terminal to select between primary UL and SUL carriers using measurement values of a DL carrier, allowing for adaptive selection and load balancing to reduce handovers and transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the terminal uses the primary UL carrier for uplink transmission, then the uplink transmission rate is high, but the uplink coverage is limited and transmission performance deteriorates in power-limited regions
Solution Approach 1:
The patent implements dynamic carrier selection by introducing a decision parameter that adapts to the terminal's antenna structure. The terminal dynamically switches between primary UL carrier and SUL carrier based on comparing a measurement value (e.g., RSRP) against the decision parameter, enabling the system to optimize between high-rate transmission and reliable coverage depending on current conditions
Solution Approach 2:
The patent changes the selection criterion from fixed frequency-based carrier assignment to dynamic parameter-based selection. The decision parameter (threshold) is adjusted according to antenna structure characteristics, and the terminal dynamically changes which carrier to use based on real-time measurement values, transforming a static system into one that adapts to varying channel conditions
2Reliability
If the terminal uses the SUL carrier for uplink transmission, then the uplink coverage is extended and transmission performance is improved in power-limited regions, but the uplink transmission rate is reduced
Solution Approach 1:
The system dynamically selects between SUL and primary UL carriers based on real-time conditions. When measurement values indicate poor channel quality or when the terminal has specific antenna structures, the system transitions to SUL carrier for reliable transmission. When conditions improve, it switches back to primary UL carrier for higher rates
Solution Approach 2:
The patent introduces a decision parameter that changes based on antenna structure characteristics. This parameter serves as an adaptive threshold that modifies the carrier selection behavior, allowing terminals with different antenna capabilities to optimally choose between carriers based on their specific hardware characteristics and current channel conditions
3Device complexity
If the terminal operates on only one carrier at a time, then the device complexity is reduced, but the adaptability to different transmission conditions is limited
Solution Approach 1:
The patent implements a dynamic single-carrier operation mode where the terminal switches between primary UL and SUL carriers based on real-time conditions. This dynamic approach provides adaptability to different transmission scenarios while maintaining the simplicity of single-carrier operation at any given moment, avoiding the complexity of simultaneous multi-carrier operation
4Ease of operation
If different terminals with different antenna structures use the same carrier selection criteria, then the system operation is simplified, but terminals with suboptimal antenna structures experience poor transmission performance
Solution Approach 1:
The patent applies local quality by customizing the carrier selection criteria according to each terminal's specific antenna structure. Different terminals receive different decision parameters tailored to their hardware characteristics, ensuring that each terminal optimizes its performance based on its local (specific) antenna capabilities rather than using a one-size-fits-all approach
Data Source
AI summary
An information processing method performed by a terminal, including: determining a decision parameter according to an antenna structure of the terminal; and determining that an uplink transmission is performed on a primary uplink (UL) carrier or a supplementary uplink (SUL) carrier based on the decision parameter and a measurement value of a downlink (DL) carrier.