Uplink Carrier Frequency Management in HSUPA Multi-Cell Systems
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Solution Overview
Problem
Existing multi-cell High Speed Uplink Packet Access (HSUPA) technologies lack implementation solutions for managing uplink carrier frequencies, leading to inefficient data transmission and user experience issues due to high load and interference when handling large amounts of uplink data.
Innovation Solution
A method and system that dynamically adjusts the number of uplink cells by determining state switching based on scheduling information, current cell load, and signal quality, involving a base station, User Equipment (UE), and Radio Network Controller (RNC) to activate or deactivate secondary uplink carrier serving cells, thereby managing uplink carrier frequencies and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple uplink cells are activated for multi-cell HSUPA collaboration, then uplink data transmission capacity is improved, but interference and system complexity increase
Solution Approach 1:
The patent implements dynamic state switching for secondary uplink carrier serving cells, allowing the system to adaptively activate or deactivate cells based on current load conditions and signal quality. This dynamic adjustment enables the system to optimize uplink data transmission capacity by activating multiple cells when needed while reducing interference by deactivating them when conditions deteriorate, thus resolving the contradiction between productivity and harmful factors.
Solution Approach 2:
The patent changes the operational state parameter of secondary uplink carrier serving cells between active and inactive states based on scheduling information, cell load, and signal quality metrics. By dynamically adjusting this parameter, the system can increase uplink data transmission capacity through multi-cell collaboration when conditions are favorable, while minimizing interference by switching to single-cell operation when conditions deteriorate.
2Productivity
If multiple uplink cells are activated for multi-cell HSUPA collaboration, then uplink data transmission capacity is improved, but device complexity increases
Solution Approach 1:
The patent introduces dynamic state switching mechanisms that control the activation and deactivation of secondary uplink carrier serving cells based on real-time conditions. This dynamic approach allows the system to achieve high uplink data transmission capacity through multi-cell collaboration only when necessary, while maintaining lower complexity by operating in single-cell mode during normal conditions, thus resolving the contradiction between productivity and device complexity.
Solution Approach 2:
The patent segments the uplink transmission system into primary and secondary carrier serving cells with distinct functional roles. The primary cell handles normal operations with low complexity, while secondary cells are available for activation to boost capacity when needed. This segmentation allows the system to achieve high productivity through multi-cell collaboration only when required, while maintaining simplicity during standard operation.
3Productivity
If state switching is performed on secondary uplink carrier serving cells, then data transmission efficiency is improved, but control signaling overhead increases
Solution Approach 1:
The patent applies partial action by performing state switching only on secondary uplink carrier serving cells when specific conditions are met, rather than continuously managing all cells. The base station determines state switching based on scheduling information, cell load, and signal quality, activating or deactivating secondary cells only when this improves data transmission efficiency. This selective approach achieves productivity improvement while minimizing control signaling overhead by avoiding unnecessary switching operations.
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AI summary
A method for managing uplink carrier frequencies is provided, which is applicable to the field of communication. The method includes the following steps: determining (1001), by a base station, a state switching on a secondary uplink carrier serving cell by a User Equipment, UE; sending (1001), by the base station, a state switching request message to the UE for requesting the UE to perform the state switching on the secondary uplink carrier serving cell; receiving(1003), by the base station, a state switching response message sent by the UE, wherein the state switching response message comprises a result of state switching performed by the UE on a secondary uplink carrier serving cell; and notifying(1004), by the base station, the result of the state switching to a secondary uplink carrier non-serving cell in a secondary carrier active set through a Radio Network Controller, RNC. A device and a system for managing uplink carrier frequencies are further provided. Through the method, device, and system provided in embodiments of the present invention, the uplink carrier frequencies are managed, so as to facilitate transmission of uplink data during multi-cell collaboration.