Dual Buffer Size Tables for Carrier Aggregation Reporting
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Solution Overview
Problem
The existing buffer size level tables in LTE wireless communication systems are insufficient for accurately reporting buffer sizes in scenarios with high data throughput, such as Carrier Aggregation and UL-MIMO, leading to limited throughput and potential over-allocation of resources.
Innovation Solution
Implementing a dual buffer size level table system, where a second table with a higher maximum buffer size value is used when Carrier Aggregation or UL-MIMO is configured, allowing more precise reporting and preventing resource wastage by dynamically selecting the appropriate table based on current conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single buffer size level table is used in LTE systems, then the system structure remains simple, but the reporting accuracy is insufficient for high data throughput scenarios
Solution Approach 1:
The patent divides the single buffer size level table into two separate tables: a first buffer size level table for conventional scenarios and a second buffer size level table for high throughput scenarios (Carrier Aggregation and UL-MIMO). This segmentation allows the system to select the appropriate table based on the operational mode, thereby improving reporting accuracy without permanently increasing system complexity.
Solution Approach 2:
The patent introduces dynamic selection between two buffer size level tables based on whether Carrier Aggregation or UL-MIMO is configured. The network can dynamically switch between tables according to the current operational requirements, allowing the system to adapt to varying throughput demands while maintaining optimal reporting accuracy.
2Productivity
If the first buffer size level table is used for high throughput scenarios, then the system structure remains simple, but the throughput is limited and resource allocation becomes inefficient
Solution Approach 1:
The patent applies different buffer size level tables to different operational contexts: the first table for conventional single-carrier scenarios and the second table for high throughput Carrier Aggregation and UL-MIMO scenarios. This local quality approach ensures that each scenario uses the most appropriate table for its specific requirements, optimizing both throughput and reporting accuracy for each case.
3Loss of energy
If buffer size reporting is not accurately matched to the communication mode, then the system operation remains simple, but resource wastage occurs due to over-allocation
Solution Approach 1:
The patent implements a feedback mechanism where the network determines the appropriate buffer size level table based on the configured communication mode (whether Carrier Aggregation or UL-MIMO is active). This feedback loop ensures that the correct table is selected, preventing over-allocation of resources and reducing waste while maintaining the necessary dual-table structure.
Data Source
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AI summary
A method and apparatus for handling buffer status reporting in a wireless communication system includes providing a first buffer size level table having a first maximum buffer size value, and providing a second buffer size level table having a second maximum buffer size value greater than the first maximum buffer size value. The method includes using the second buffer size level table when carrier aggregation (CA) is configured with more than one UL carrier component (CC) or when more than one UL CC is activated. To indicate whether to use the second buffer size level table or the first buffer size level table, an indication can be used in one of a Radio Resource Control (RRC) message, a Medium Access Control (MAC) Control Element or a corresponding subheader of the MAC Control Element.