Base Station Downlink Data Discard Mechanism
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Solution Overview
Problem
In wireless communication systems with Dual Connectivity, there is a lack of specified means for a first base station to discard downlink data that has been transmitted to a second base station, leading to internal errors and data management issues.
Innovation Solution
A method where the second base station identifies and transmits information for discarding downlink data to the first base station, which then discards the data not transmitted to the terminal, using specific commands and formats to manage data transmission and discard instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the second base station transmits downlink data to the first base station for forwarding to the terminal, then data transmission capability is improved, but data management complexity and error risk increase due to lack of discard control mechanisms
Solution Approach 1:
The second base station performs preliminary identification of downlink data that needs to be discarded before transmission, and sends discard indication information to the first base station in advance. This allows the first base station to discard the identified data without attempting transmission, thereby simplifying data management while maintaining efficient data transmission capability.
2Productivity
If the first base station receives downlink data from the second base station, then data reception capability is improved, but reliability decreases due to inability to discard erroneous or unnecessary data
Solution Approach 1:
The second base station provides feedback information (discard indication) to the first base station regarding which downlink data should be discarded. This feedback mechanism enables the first base station to reliably manage received data by discarding erroneous or unnecessary data, thereby improving transmission reliability while maintaining reception capability.
3Adaptability or versatility
If downlink data is transmitted through multiple base stations, then network coverage and transmission flexibility are improved, but loss of information increases due to lack of discard control
Solution Approach 1:
The second base station identifies and marks downlink data that should be discarded before transmission to the first base station. This preliminary action prevents unnecessary data from being transmitted through the multi-base station path, thereby reducing information loss while maintaining the transmission flexibility provided by multiple base stations.
Data Source
AI summary
A wireless communication system of the present invention includes a first base station (30) and a second base station (20) configured to be capable of transmitting downlink data received from a core network to a terminal via the second base station (20) and the first base station (30). The second base station (20) transmits, to the first base station (30), information for identifying downlink data to be discarded from among the downlink data transmitted to the first base station (30) and a command for discarding the downlink data identified by the information. The first base station (30) discards downlink data not transmitted to the terminal from among the downlink data identified by the information.