Radio Communication System Base Station Recognition Processing Load
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Solution Overview
Problem
In radio communication systems with multiple base stations operating on different frequency bands, the processing load on user devices to recognize base stations is high, leading to increased power consumption due to the need for correlation calculations across different frequency bands.
Innovation Solution
The system includes a first base station transmitting synchronization signals indicating its cell identity and a second base station transmitting identification signals indicating its cell identity, with the user device receiving synchronization state information and frequency information to identify the second base station without performing timing-search processing, thereby reducing the processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the user device performs cell searching in multiple frequency bands to recognize both macro base stations and small base stations, then the base station recognition capability is improved, but the processing load and power consumption increase
Solution Approach 1:
The macro base station transmits synchronization state information and frequency information in advance before the user device needs to search for small base stations. This preliminary provision of information allows the user device to skip time-consuming timing-search processing when detecting small base stations, thereby reducing power consumption while maintaining multi-frequency band recognition capability
Solution Approach 2:
The macro base station acts as an intermediary that provides synchronization state information and frequency information about small base stations to user devices. This intermediary role enables user devices to efficiently identify small base stations without having to perform exhaustive searches across multiple frequency bands, thus reducing processing load and power consumption
2Measurement precision
If the user device performs correlation calculations across different frequency bands to identify multiple base stations, then the base station identification accuracy is improved, but the processing load increases
Solution Approach 1:
The patent extracts and separates the timing-search processing step from the overall cell searching process. By obtaining synchronization state information and frequency information from the macro base station in advance, the user device can directly perform correlation calculations on the identification signal frequency without first conducting timing-search processing, thereby reducing processing load while maintaining identification accuracy
Solution Approach 2:
The macro base station performs preliminary actions by calculating and transmitting synchronization state information and frequency information before the user device needs to identify small base stations. This preliminary provision of accurate frequency information enables the user device to perform correlation calculations directly, maintaining identification accuracy while reducing processing complexity
Data Source
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AI summary
A radio communication system includes a first base station that is identified by a first cell identity, a second base station that is identified by a second cell identity, and a user device that can perform radio communication with each of the base stations. The user device detects a first transmission timing based on a first synchronization signal from the first base station and establishes synchronization with the first base station. The first base station notifies the user device of synchronization state information related to a synchronization state with the second base station and of frequency information related to an identification signal frequency that is used by the second base station to transmit an identification signal. The user device, based on the synchronization state information, performs identifying processing, on the identification signal frequency indicated by the frequency information, to identify the second cell identity indicated by the identification signal.