Master Base Station AMBR Allocation in Dual Connectivity
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Solution Overview
Problem
Current technologies lack methods for determining and coordinating the aggregate maximum bit rates of non-GBR services between master and secondary base stations in dual connectivity scenarios, leading to inefficiencies in data transmission.
Innovation Solution
A method for allocating and coordinating aggregate bit rates between base stations, where the master base station obtains and allocates the aggregate maximum bit rate (AMBR) for both itself and the secondary base station, using information such as quality of service requirements, current and historical bit rates, buffer information, and resource status to ensure the sum of bit rates does not exceed the UE-AMBR, thereby optimizing data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If aggregate maximum bit rates are allocated independently to MeNB and SeNB, then each base station can manage its own data bearers, but the coordination between base stations is insufficient leading to potential exceeding of UE-AMBR
Solution Approach 1:
The SeNB feeds back its allocated AMBR and actual bit rate usage information to the MeNB. The MeNB uses this feedback to calculate and allocate remaining AMBR to the SeNB, ensuring the sum of AMBRs from both base stations does not exceed the UE-AMBR while maintaining independent management capabilities.
Solution Approach 2:
The UE-AMBR is segmented into portions allocated to MeNB and SeNB respectively. The MeNB first determines its own AMBR allocation, then calculates the remaining AMBR for SeNB based on feedback information, achieving coordinated segmentation of the total bit rate budget.
2Reliability
If aggregate maximum bit rates are coordinated between base stations, then UE-AMBR compliance is ensured, but the complexity of bit rate allocation increases
Solution Approach 1:
The MeNB autonomously determines its own AMBR allocation and initiates the coordination process. The SeNB self-reports its allocated AMBR and usage information to the MeNB, allowing the MeNB to independently calculate and enforce the remaining AMBR allocation without requiring complex centralized control.
3Loss of time
If bit rates are dynamically regulated between base stations, then data transmission delay is reduced, but the complexity of real-time coordination increases
Solution Approach 1:
The AMBR allocation is made dynamic rather than static. The MeNB and SeNB continuously exchange feedback information about actual bit rate usage and buffer status, allowing real-time adjustment of AMBR allocations to match actual traffic conditions and reduce transmission delay.
Solution Approach 2:
Real-time feedback loops are established where the SeNB reports its actual bit rate consumption and buffer status to the MeNB, which then adjusts the AMBR allocation dynamically. This feedback mechanism enables the system to respond to changing traffic conditions and minimize data transmission delay.
Data Source
AI summary
A method for allocating an aggregate maximum bit rate (AMBR) of a user equipment (UE) includes obtaining, by a master base station (MeNB), the AMBR of the UE (UE-AMBR), and obtaining, by the MeNB, information for allocating an AMBR of a secondary base station (SeNB), and allocating, the AMBR of the SeNB according to the information, wherein a sum of the AMBRs of the MeNB and the SeNB is not greater than the UE-AMBR. A method for coordinating aggregate bit rates of non-GBR services between base stations includes sending, by an SeNB, information for allocating an aggregate maximum bit rate (AMBR) of the SeNB to an MeNB, and receiving, by the SeNB, the AMBR allocated by the MeNB.