Radio Base Station Path Search Unit for CDMA Reception Accuracy
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Solution Overview
Problem
In CDMA radio communication systems, especially those using UMTS or radio LAN, the existing path search mechanisms are inefficient when handling multiple users or systems, leading to reduced reception accuracy and transmission efficiency due to the need for multiple searchers and delayed path detection, which can result in unnecessary re-transmissions and lowered efficiency.
Innovation Solution
A radio communication apparatus that incorporates a control unit and a path search unit to identify and prioritize transmitting destinations based on synchronization and data accumulation, utilizing shared channels for data transmission and response verification, allowing for efficient path search and data transmission control to improve reception accuracy and reduce re-transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a searcher is provided for each system to process received signals, then reception accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple searchers into a single shared searcher that serves multiple systems. The searcher is time-division multiplexed among different systems, allowing one physical searcher unit to perform path search functions for multiple users or systems sequentially, thereby reducing device complexity while maintaining reception accuracy through proper timing control and signal separation.
Solution Approach 2:
The searcher is designed with universal functionality to handle multiple systems. By implementing multi-functionality, the single searcher can identify and process signals from different systems using the same hardware resources, eliminating the need for dedicated searchers for each system while preserving the ability to accurately detect and correlate signals across multiple systems.
2Device complexity
If a shared searcher is used among multiple systems, then device complexity is reduced, but path detection timing is delayed
Solution Approach 1:
The patent implements preliminary action by performing path search operations in advance for multiple systems before actual data transmission begins. The searcher proactively identifies and stores path information for multiple systems ahead of time, so when data transmission starts, the path detection is already prepared, eliminating delays and enabling immediate efficient data reception across multiple systems.
Solution Approach 2:
The searcher operates continuously to maintain path detection for multiple systems simultaneously. By keeping the search function active and continuous rather than intermittent, the system ensures that path information is always available for multiple systems without interruption or delay, allowing seamless transition between different systems during time-division multiplexing operations.
3Measurement precision
If path search is performed for all transmitting destination apparatuses, then reception accuracy is improved, but transmission efficiency decreases due to unnecessary re-transmissions
Solution Approach 1:
The patent employs feedback mechanisms where receiving apparatuses send acknowledgment signals back to transmitting apparatuses. Based on this feedback information about successful receptions, the system can identify which data transmissions were successfully received and eliminate unnecessary re-transmissions, thereby improving transmission efficiency while maintaining high reception accuracy through targeted path search only where needed.
Solution Approach 2:
The system dynamically adjusts path search parameters and priorities based on real-time transmission conditions and feedback information. By changing the search parameters adaptively rather than performing uniform exhaustive searches for all apparatuses, the system optimizes reception accuracy for critical transmissions while reducing unnecessary path search operations that would lower overall transmission efficiency.
Data Source
AI summary
To improve accuracy for verifying reception in the data transmission utilizing the common channel. A radio communication apparatus for transmitting the data to the transmitting destination apparatus selected from a plurality of transmitting destination apparatuses using the shared channel, comprises a control unit for controlling data transmission and a path search unit for identifying the transmitting destination apparatus as the object of the path search in accordance with control of data transmission.