Base Station Data Delivery Control via Mobile Station Buffer Feedback
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Solution Overview
Problem
In dual connectivity wireless communication systems, the communication quality between primary and secondary wireless base stations is low, leading to delayed data acquisition and inappropriate data transmission control, resulting in data delivery delays and potential data loss due to the inability to accurately reflect the latest data retention state in the RLC layer.
Innovation Solution
Implementing a method where the mobile station notifies the primary base station of its data retention state through a PDCP status report, allowing the primary base station to control the data delivery amount to the secondary base station based on the reported retention amount, thereby improving communication efficiency by using a wired link for notification and wireless communication for data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is transmitted from the PDCP layer to the RLC layer via the link between primary and secondary base stations, then data delivery is enabled, but communication quality is low and data acquisition is delayed
Solution Approach 1:
The mobile station acts as an intermediary to forward data retention state information from the secondary base station to the primary base station. This resolves the contradiction by enabling the primary base station to make informed data transmission decisions despite the low-quality link between base stations, as the mobile station relays critical buffer status information that allows for appropriate data delivery control.
2Ease of operation
If the PDCP layer transmits data based on retained data amount in the RLC layer, then data transmission control is enabled, but information on the retention amount is delayed due to low communication quality
Solution Approach 1:
A feedback mechanism is established where the mobile station periodically reports the data retention state in the RLC layer buffer to the primary base station. This feedback loop enables the primary base station to continuously adjust data transmission control based on current buffer status, resolving the time delay issue by providing timely information about the retention amount despite the low-quality inter-base-station link.
3Productivity
If data is delivered from the PDCP layer to the RLC layer without accurate retention information, then data transmission continues, but data loss occurs due to buffer overflow
Solution Approach 1:
The feedback mechanism where the mobile station reports buffer retention state to the primary base station enables reliable data transmission control. The primary base station uses this feedback information to stop or resume data delivery to the RLC layer based on whether the buffer is full or has available space, thus preventing buffer overflow and data loss while maintaining continuous transmission when conditions permit.
Solution Approach 2:
The system enables self-service data flow control where the primary base station autonomously regulates data delivery to the RLC layer based on the retention information received from the mobile station. This self-service mechanism allows the system to automatically prevent buffer overflow without external intervention, maintaining both transmission continuity and data integrity.
Data Source
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AI summary
A base station (100) for communicating data with a mobile station (300), comprising: a communication unit for transmitting data to the mobile station (300); a transfer unit for transferring a portion of data to be transmitted to the mobile station to another wireless communication apparatus (200); and a receiving unit for receiving, from the mobile station, data related information for data transferred to the another wireless communication apparatus, wherein the data related information includes a sequence number of a packet to be received first among packets which have not arrived from the another wireless communication apparatus.