UE-AMBR Calculation for Dynamic PDU Session Bandwidth Control
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Solution Overview
Problem
The challenge in 5G mobile communication systems is determining how the base station obtains the UE-AMBR for bandwidth control on PDU sessions, which is not adequately addressed in current technologies.
Innovation Solution
A method and device for the base station to acquire and calculate UE-AMBR by receiving initial context requests from the core network, updating AMBRs, and recalculating UE-AMBR based on subscribed or authorized values for each established PDU session, ensuring accurate bandwidth control for Non GBR services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base station uses the subscribed UE-AMBR value directly from the core network, then the bandwidth control is simple to implement, but it cannot adapt to dynamic changes in PDU session bandwidth requirements
Solution Approach 1:
The patent implements dynamic UE-AMBR calculation by continuously monitoring PDU session establishment, modification, and release events. The base station recalculates UE-AMBR whenever PDU sessions change, ensuring the bandwidth control parameter adapts dynamically to current network conditions and service requirements rather than using a static subscribed value.
Solution Approach 2:
The patent performs preliminary calculation of UE-AMBR by summing the AMBR values of all established PDU sessions before actual data transmission begins. This pre-calculated UE-AMBR is then used for bandwidth control, ensuring that resource allocation is optimized in advance based on the current set of active PDU sessions.
2Measurement precision
If the base station calculates UE-AMBR by summing all PDU session AMBRs, then the bandwidth control accuracy is improved, but the calculation complexity and signaling overhead increase
Solution Approach 1:
The patent implements a feedback mechanism where the base station receives AMBR values for each PDU session from the core network and uses this feedback information to continuously update the UE-AMBR calculation. This feedback loop ensures accurate bandwidth control while avoiding redundant calculations by only recalculating when PDU session information changes.
Solution Approach 2:
The base station performs self-service by autonomously calculating UE-AMBR based on received PDU session AMBR information without requiring additional core network intervention. The base station maintains local tracking of PDU session states and performs calculations independently, reducing signaling overhead while maintaining precision.
3Reliability
If the base station updates UE-AMBR frequently to reflect PDU session changes, then the service quality is improved, but the signaling frequency and network load increase
Solution Approach 1:
The patent implements periodic updates of UE-AMBR triggered by specific PDU session events (establishment, modification, release) rather than continuous updates. This event-driven periodic action ensures service quality is maintained by updating bandwidth control parameters at appropriate intervals while minimizing unnecessary signaling and network load.
Data Source
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AI summary
Provided is a user equipment maximum bandwidth control method and device, and computer storage medium. The method includes that a gNodeB acquires a first user equipment-aggregated maximum bit rate (UE-AMBR) and an aggregated maximum bit rate (AMBR) corresponding to all established protocol data unit (PDU) sessions from a core network; the gNodeB calculates a second UE-AMBR based on the first UE-AMBR and the AMBR corresponding to all the established PDU sessions; and the gNodeB executes bandwidth control on a Non-Guaranteed Bit Rate (Non GBR) service of a user equipment (UE) in accordance with the second UE-AMBR.