Cooperative Base Station Resource Allocation via Threshold Feedback
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Solution Overview
Problem
In wireless communication systems, wireless communication terminals consume excessive uplink radio resources to transmit information required for base station cooperation, leading to reduced resources available for user data transmission, especially as the number of affiliated terminals increases, and the complexity of radio resource allocation in cooperative transmission scenarios becomes significant.
Innovation Solution
A wireless communication system where a first base station and a second base station connected through a wired network notify a wireless communication terminal of conditions for cooperative data transmission only when the communication quality meets a certain threshold, allowing the terminal to transmit necessary information, thereby optimizing resource allocation and reducing unnecessary resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations cooperate to transmit data to wireless communication terminals, then the user rate of cell edge terminals is improved, but the uplink radio resources consumed for transmitting cooperation information increases
Solution Approach 1:
The patent changes the parameter of information transmission by using differential feedback - terminals only feed back channel quality information when it changes beyond a threshold, rather than continuously feeding back all information. This reduces uplink radio resource consumption while maintaining the cooperative transmission capability that improves user rate.
Solution Approach 2:
The patent extracts only the necessary channel quality information that has changed beyond a threshold, rather than transmitting all channel information. By taking out only the essential changed parameters, the system reduces uplink resource consumption while preserving the core functionality of cooperative transmission.
2Productivity
If all wireless communication terminals transmit channel quality information periodically, then the base station can perform optimal resource allocation, but the uplink radio resources are wasted when communication quality is already sufficient
Solution Approach 1:
The patent implements periodic information transmission with a twist - terminals periodically monitor channel quality but only transmit feedback when changes exceed a threshold. This threshold-based periodic action reduces unnecessary transmissions while maintaining adequate resource allocation capability.
Solution Approach 2:
Instead of requiring all terminals to transmit all channel information, the patent uses partial action by having terminals transmit only when necessary (when channel quality changes beyond threshold). This reduces excessive resource consumption while maintaining sufficient information for resource allocation.
3Area of stationary object
If the number of affiliated terminals increases, then the network coverage is improved, but the complexity of radio resource allocation in cooperative transmission increases
Solution Approach 1:
The patent extracts only the essential changed channel quality information from terminals, reducing the data processing burden at the base station. By taking out only necessary information rather than processing all terminal data continuously, the system manages complexity while supporting increased network coverage.
Data Source
AI summary
The present invention is directed to achievement of a data transmission control to cause base stations to cooperate with one another, taking into account efficient use of radio resources. A wireless communication system, which is an aspect of the present invention, includes: a first base station; a second base station connected via a wired network; and a wireless communication terminal that conducts at least one of single data transmission in which a single base station transmits data and cooperative data transmission in which a plurality of base stations cooperate to transmit data. The base stations notify the wireless communication terminal of a condition indicating a case where the cooperative data transmission can be performed. If the communication quality of the propagation path meets the condition, the wireless communication terminal transmits, to the base stations, information that is required for the cooperative data transmission.