Base Station Access Stratum Control for Bearer Split Fairness
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Solution Overview
Problem
In LTE networks, dual connectivity involving bearer split leads to potential unfairness in resource allocation between logical channels not subjected to bearer split and those that are, affecting the performance of MAC PDU generation, uplink and downlink control, and overall access stratum control.
Innovation Solution
A radio communication system where a first base station receives bearer split status information from a second base station to perform control of the access stratum related to a network bearer split across both stations, ensuring balanced resource allocation and intended performance in Layer 1/Layer 2 control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual connectivity involving bearer split is implemented to improve resource allocation flexibility and communication performance, then adaptability and productivity are improved, but fairness in resource allocation between logical channels deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the first base station receives bearer split status information from the second base station. This feedback loop enables the first base station to adjust its resource allocation decisions based on the actual split status, ensuring that logical channels subjected to bearer split receive appropriate resource allocation while maintaining fairness with non-split logical channels.
Solution Approach 2:
The patent introduces bearer split status information as an intermediary element that mediates between the dual connectivity functionality and the resource allocation fairness. This status information acts as a signal that enables coordinated resource allocation across both base stations, ensuring that the bearer split operation does not compromise the fairness of resource distribution.
2Measurement precision
If bearer split status information is exchanged between base stations to maintain resource allocation fairness, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential bearer split status information from the second base station and transmits it to the first base station. By taking out only the necessary status information rather than complete resource allocation details, the patent achieves accurate bearer split awareness while minimizing the communication overhead and complexity between base stations.
Data Source
AI summary
A radio communication system includes a first base station that manages a first cell (110), a second base station (12) that manages a second cell (120), and a radio terminal (2). The radio terminal (2) supports dual connectivity involving a bearer split in which a first network bearer between the radio terminal (2) and a core network (3) is split over the first base station (11) and the second base station (12). The first base station (11) receives, from the second base station (12), bearer split status information about communication of the first network bearer in the second base station (12), and performs control of an access stratum related to the first network bearer. It is thus possible to contribute, for example, to an improvement in control of an access stratum when dual connectivity involving a bearer split is performed.