Inter-Base Station Carrier Aggregation Data Coordination
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Solution Overview
Problem
In inter-base station carrier aggregation, multiple base stations independently scheduling user equipment (UE) can lead to data receiving failures due to excessive data transmission exceeding the UE's radio access capability, resulting in data discarding and errors.
Innovation Solution
A communication method where a first base station sends data to the UE according to first data allocation information determined by its radio access capability, and a second base station sends data according to second data allocation information determined by the first base station, ensuring that the total data from both base stations in a transmission time interval does not exceed the UE's receiving capability, through coordinated data allocation and timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple base stations independently schedule user equipment in inter-base station carrier aggregation, then system bandwidth and data rate are improved, but data receiving reliability deteriorates due to excessive data transmission exceeding UE capability
Solution Approach 1:
The patent implements a feedback mechanism where the first base station receives data allocation capability information from the UE and uses this feedback to coordinate data allocation with the second base station. The UE reports its maximum data reception capability, and the base stations adjust their scheduling decisions based on this feedback to ensure the total allocated data does not exceed UE capacity, thereby maintaining reliability while achieving high throughput.
Solution Approach 2:
The first base station acts as an intermediary between the UE and the second base station. It receives scheduling requests from the second base station, coordinates data allocation based on UE capability, and manages the overall data distribution. This intermediary role ensures that independent scheduling by multiple base stations does not lead to excessive data allocation, resolving the contradiction between high productivity and reliable data reception.
2Speed
If multiple base stations send data simultaneously to UE, then transmission efficiency is improved, but data errors increase due to exceeding UE's processing capability
Solution Approach 1:
The patent dynamically adjusts the data allocation parameters of each base station based on the UE's reported capability and current network conditions. The first base station modifies scheduling parameters such as resource block allocation, modulation and coding schemes, and data volumes to ensure that the sum of data from all base stations matches the UE's processing capability. This parameter adjustment maintains high transmission speed while preventing data errors.
3Adaptability or versatility
If carrier aggregation is configured with multiple serving cells from different base stations, then spectrum utilization is improved, but scheduling complexity increases
Solution Approach 1:
The patent segments the scheduling function into two parts: the first base station handles overall coordination and data allocation management, while the second base station focuses on local resource scheduling. This segmentation reduces the scheduling complexity at each base station while maintaining the adaptability benefits of inter-base station carrier aggregation. The first base station uses simplified coordination messages to manage the second base station's scheduling decisions.
Data Source
AI summary
The present invention provides a communication method to solve a problem of a failure in data receiving that arises. The method includes: sending, by a first base station, first data to UE according to first data allocation information that is determined according to a radio access capability of the UE; and sending, by a second base station according to second data allocation information that is determined by the first base station according to the radio access capability of the UE, second data to the UE; where the first base station performs carrier aggregation with the second base station, and a total amount of data that is sent by the first base station and the second base station to the UE in a same TTI does not exceed a total amount of data that can be received according to the radio access capability of the UE.