Terminal Uplink Band Selection for Multi-Band Carrier Aggregation
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Solution Overview
Problem
Conventional technologies lack the ability to select the optimal combination of three or four uplink bands for improved throughput in carrier aggregation, leading to suboptimal performance.
Innovation Solution
A terminal with a control unit that selects a combination of uplink bands, including a first band for a first uplink, a second band for a second uplink, a third band for a third uplink with a different frequency, and a fourth band for a fourth uplink, and a transmitting unit that performs uplink transmission using these selected bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional carrier aggregation is used with limited band selection, then device complexity is reduced, but uplink throughput is limited
Solution Approach 1:
The patent implements dynamic band selection by enabling the terminal to choose from multiple uplink bands (first, second, third, and fourth bands with different frequency characteristics) based on real-time channel conditions. The control unit dynamically determines which bands to aggregate, allowing the system to adapt to varying network conditions and optimize throughput without being fixed to a predetermined band configuration.
Solution Approach 2:
The patent changes the parameter of available band combinations by introducing multiple uplink bands with different frequency characteristics. Instead of being limited to a single band or fixed combination, the system can vary the band selection parameters (frequency, bandwidth, aggregation configuration) to optimize performance. This includes selecting from different frequency ranges and adjusting aggregation parameters based on channel conditions.
2Productivity
If multiple uplink bands are selected for carrier aggregation, then uplink throughput is improved, but the number of possible configurations increases
Solution Approach 1:
The patent employs feedback mechanisms where the control unit receives channel state information and network conditions, then uses this feedback to determine the optimal band combination. The terminal reports its capabilities and the network provides guidance on suitable bands, creating a feedback loop that guides the selection process. This ensures that the increased flexibility in band selection is managed through intelligent decision-making based on real-time conditions.
3Productivity
If fixed band selection is used, then ease of operation is maintained, but optimal throughput cannot be achieved
Solution Approach 1:
The patent implements self-service through automatic band selection where the terminal autonomously determines the optimal band combination based on its own capabilities and detected channel conditions. The control unit automatically evaluates available bands and selects appropriate combinations without requiring manual intervention. This maintains ease of operation while achieving optimal throughput, as the system serves itself by making intelligent decisions about band aggregation.
Data Source
AI summary
A terminal includes: a control unit that selects a plurality of bands from among a first band for a first uplink, a second band for a second uplink which supplements the first uplink, a third band for a third uplink in which a frequency band is different from frequency bands in the first band and the second band, and a fourth band for a fourth uplink which supplements the third uplink; and a transmitting unit that performs an uplink transmission using a combination of component carriers allocated to the selected plurality of bands.