Dynamic Uplink Carrier Selection in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in improving communication performance due to limitations in frequency band deployment and processing, necessitating more flexible and efficient use of multiple uplink carriers for enhanced performance.
Innovation Solution
A wireless communication method where a network device determines and indicates to a terminal device which uplink carrier to use for transmission, allowing for flexible selection and configuration of uplink carriers, including activation, configuration, and power adjustment, to improve communication performance by dynamically scheduling and switching between carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed uplink carrier and fixed downlink carrier are used in LTE system, then system simplicity is maintained, but communication performance cannot be improved sufficiently
Solution Approach 1:
The patent implements dynamic carrier indication mechanisms where the network device can flexibly indicate different uplink carriers for different terminal devices or different transmission scenarios. This allows the system to adapt carrier selection dynamically rather than using fixed carrier assignments, thereby improving communication performance while managing complexity through standardized indication procedures
Solution Approach 2:
The patent changes the parameter of carrier selection from fixed to variable by introducing indication information that specifies which uplink carrier should be used. This parameter change enables the system to optimize communication performance by selecting appropriate carriers based on current network conditions, terminal capabilities, and service requirements
2Adaptability or versatility
If multiple uplink carriers are deployed for terminal device, then uplink transmission flexibility is improved, but system complexity increases
Solution Approach 1:
The patent segments the uplink carrier selection process into distinct components: carrier configuration by the network device, carrier indication through specific signaling, and carrier execution by the terminal device. This segmentation allows multiple carriers to be managed systematically, improving uplink transmission flexibility while controlling complexity through divided responsibilities
Solution Approach 2:
The patent introduces indication information as an intermediary mechanism between the network device and terminal device for carrier selection. This intermediary carries the carrier selection decision from the network to the terminal, enabling flexible multi-carrier operation without requiring complex direct negotiation or configuration between devices
3Adaptability or versatility
If network device provides carrier indication to terminal device, then uplink transmission adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent designs the indication information to serve multiple functions: it identifies the uplink carrier, implies transmission parameters, and coordinates network-terminal actions. This multi-functionality reduces the need for separate signaling for each parameter, thereby improving uplink transmission adaptability while minimizing signaling overhead through consolidated indication
Data Source
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AI summary
Embodiments of this application provide a wireless communication method and a device, to improve communication performance in terms of frequency band deployment, use, and processing. The method includes: determining, by a network device, a first uplink carrier, where the first uplink carrier is one of a plurality of uplink carriers that can be used for a terminal device; and sending, by the network device, first information to the terminal device, where the first information indicates that the terminal device uses or can use the first uplink carrier to perform uplink transmission or processes the first uplink carrier.