Base Station Buffer Grouping for Dual Connectivity Flow Control
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Solution Overview
Problem
In dual connectivity wireless communication systems, frequent flow control signals in units of data radio bearers lead to increased communication band consumption and potential throughput reduction, especially for terminals with unchanged positions, as existing technologies do not efficiently manage data transfer between master and secondary base stations.
Innovation Solution
The system transmits information on free buffer space of data radio bearer groups from the secondary base station to the master base station in units of data radio bearer groups, allowing for efficient communication band usage by reducing unnecessary flow control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flow control signals are transmitted frequently in units of data radio bearers to appropriately perform data transfer from MeNB to SeNB, then data transfer appropriateness is improved, but communication band consumption increases and throughput may decrease
Solution Approach 1:
The patent merges multiple data radio bearers into a single data radio bearer group for flow control purposes. Instead of transmitting separate flow control signals for each individual data radio bearer, the system transmits a single flow control signal that represents the aggregate buffer status of the entire group. This combining approach maintains appropriate data transfer control while significantly reducing the number of flow control signals transmitted over the communication band.
2Measurement precision
If flow control signals are transmitted for each data radio bearer, then flow control precision is improved, but the number of flow control signals increases in proportion to the number of data radio bearers
Solution Approach 1:
The patent combines multiple data radio bearers into a single group and transmits flow control information at the group level rather than individual bearer level. The flow control signal contains buffer status information that represents the aggregate state of all data radio bearers within the group, thereby reducing the quantity of flow control signals from being proportional to the number of individual bearers to a fixed small number based on the number of groups.
Solution Approach 2:
The patent segments data radio bearers into multiple groups, where each group is managed by a single flow control signal. This segmentation allows the system to maintain flow control precision at the group level while reducing the overall number of flow control signals. The segmentation creates a hierarchical structure where individual bearers are aggregated into groups, and flow control is performed at the group level rather than the individual bearer level.
Data Source
AI summary
To enable a communication band between base stations to be efficiently used, a wireless communication system provided with a main base station and a secondary base station. A wireless communication system, wherein when dual connectivity, which is an operation mode that allows connection to both the main base station and the secondary base station by a terminal, is executed, the secondary base station transmits information pertaining to the free buffer space of a wireless data bearer group comprising a plurality of wireless data bearers to the main base station in units of a wireless data bearer group.