Master Base Station UE-AMBR Allocation for Dual Connectivity Rate Control
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Solution Overview
Problem
In dual connectivity (DC) systems, effectively allocating the user equipment aggregate maximum bit rate (UE-AMBR) to control transmission rates between each base station and user equipment (UE) is challenging, as it requires balancing the sum of rates of non-guaranteed bit rate (non-GBR) services across multiple base stations to prevent exceeding the UE-AMBR limit.
Innovation Solution
A method where the master base station determines and allocates a first UE-AMBR for itself and a second UE-AMBR for a secondary base station, with the ability to adjust these allocations based on network resource status information, ensuring that the sum of transmission rates does not exceed the total UE-AMBR. This involves sending the second UE-AMBR to the secondary base station and providing instruction information for data splitting control, allowing each base station to manage its transmission rates accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE-AMBR is allocated to multiple base stations in a DC system, then the transmission rate control is improved, but the complexity of rate allocation and coordination between base stations increases
Solution Approach 1:
The patent segments the total UE-AMBR into separate AMBR values for each base station (first AMBR for master base station, second AMBR for secondary base station). This segmentation allows each base station to independently control its transmission rate without requiring complex real-time coordination, thus improving reliability while managing complexity through pre-defined rate allocations.
Solution Approach 2:
The patent applies preliminary action by determining and allocating the first AMBR and second AMBR in advance before actual data transmission. The master base station calculates these values based on the total UE-AMBR and network conditions, then distributes them to respective base stations. This pre-allocation eliminates the need for complex real-time rate coordination during transmission.
2Productivity
If the transmission rate is increased to utilize both base stations, then the throughput is improved, but the risk of exceeding the UE-AMBR limit increases
Solution Approach 1:
The patent segments the total UE-AMBR into first AMBR and second AMBR, assigning specific rate limits to each base station. This ensures that even when both base stations transmit simultaneously at their allocated rates, the sum will not exceed the total UE-AMBR, thus maintaining reliability while enabling high throughput through coordinated multi-base station transmission.
Solution Approach 2:
The patent implements feedback mechanisms where the master base station monitors the actual transmission rates and network conditions, then adjusts the first AMBR and second AMBR allocations accordingly. This dynamic feedback ensures that the UE-AMBR limit is never exceeded while maximizing throughput based on real-time network capacity.
3Adaptability or versatility
If dynamic adjustment of AMBR allocation is implemented, then the resource utilization is improved, but the signaling overhead and control complexity increase
Solution Approach 1:
The patent applies dynamics by enabling the master base station to adjust the first AMBR and second AMBR allocations based on changing network conditions, traffic patterns, and base station capacities. This dynamic adjustment improves resource utilization and adaptability while maintaining manageable signaling overhead through efficient update mechanisms.
Data Source
AI summary
Example transmission rate control methods and apparatus are described. One example method includes obtaining a user equipment aggregate maximum bit rate (UE-AMBR) by a master base station. The master base station determines, based on the UE-AMBR, a first UE-AMBR used for the master base station and a second UE-AMBR used for a secondary base station. The master base station sends the second UE-AMBR to the secondary base station, and sends instruction information used to instruct the secondary base station to control data splitting for the master base station to the secondary base station. In this application, a transmission rate between each base station and a UE is controlled by allocating a UE-AMBR.