LTE-WLAN Aggregation Buffer Status Reporting for ACDC Access Control
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting multi-connectivity across different radio access technologies and effectively applying application-specific congestion control for data communication (ACDC) information in a wireless communication system, particularly during handovers.
Innovation Solution
The system broadcasts ACDC configuration information to terminals, allowing them to determine access based on ACDC parameters, enabling seamless communication across various radio access technologies and maintaining connectivity during handovers through LTE-WLAN aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE-WLAN aggregation is implemented for multi-connectivity, then communication speed and data volume are improved, but device complexity and network management difficulty increase
Solution Approach 1:
The patent segments the communication system into distinct functional modules: ACDC parameter determination module, access control module, and buffer status reporting module. This segmentation allows each module to handle specific tasks independently, reducing overall system complexity while enabling LTE-WLAN aggregation functionality.
Solution Approach 2:
The patent implements preliminary action by having the terminal determine ACDC parameters and access control decisions before actual data transmission. The buffer status is reported in advance to the base station, allowing the network to pre-configure resources and maintain connectivity during handovers, thus simplifying real-time decision-making.
2Measurement precision
If ACDC information is broadcast to all terminals, then access control precision is improved, but information transmission overhead increases
Solution Approach 1:
The patent applies local quality by providing ACDC configuration information specifically tailored to terminals belonging to the HPLMN. The base station broadcasts ACDC parameters that are locally optimized for the home network's congestion control requirements, rather than using generic parameters for all terminals, thus improving access control precision without excessive overhead.
Solution Approach 2:
The patent implements universality by designing the ACDC parameter structure to serve multiple functions: it provides access control decisions, congestion level indication, and buffer status reporting triggers. This multi-functionality reduces the need for separate information elements, thereby reducing overall information overhead while maintaining precise access control.
3Measurement precision
If buffer status reporting is enhanced for ACDC, then network control accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the buffer status reporting function with existing uplink signaling mechanisms. The terminal incorporates buffer status information into regular uplink transmissions or combines it with other control information, rather than using separate dedicated reporting channels. This merging reduces signaling overhead while maintaining accurate network control through the ACDC framework.
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AI summary
Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The disclosed communication technique and system therefor can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety related services, and the like) on the basis of 5G communication technology and IoT-related technology. More specifically, a communication method of a terminal in a mobile communication system comprises the steps of: receiving, from a base station, system information including application specific congestion control for data communication (ACDC) configuration information for indicating whether to apply ACDC to a terminal belonging to a home public land mobile network (HPLMN); determining whether to permit access to the base station on the basis of parameters relating to the ACDC, when the application of the ACDC to the terminal belonging to the HPLMN is set according to the ACDC configuration information; and communicating with the base station according to the determination result.