Core Network Controlled Traffic Transmission in Dual Connectivity
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Solution Overview
Problem
Current 5G network architectures lack the ability for core networks to differentiate and control the usage of LTE and NR access technologies, hindering service quality and charging policies in dual-connectivity scenarios, as the split bearer decision is transparent to core network entities.
Innovation Solution
A mechanism is introduced for core network-controlled traffic transmission in dual/multiple-connectivity systems, where a policy is determined and provided to radio access network nodes based on the status of dual/multiple connectivity, enabling differentiated charging and service quality management by determining the usage policy for LTE and NR access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the split bearer decision is made transparent to core network entities, then the radio access network can autonomously manage bearer splitting based on radio resource status, but the core network loses the ability to differentiate and control usage of LTE and NR access technologies for charging and QoS policies
Solution Approach 1:
The patent segments the bearer splitting control function by introducing separate indication fields for each RAT type (E-UTRA and NR) in the QoS parameters. This allows the core network to independently control and differentiate usage of different access technologies while maintaining autonomous management capabilities at the radio access network level.
Solution Approach 2:
The patent introduces an intermediary mechanism through modified QoS parameters that carry RAT-specific usage indication fields. These parameters act as mediators between the core network policy decisions and the radio access network bearer splitting operations, enabling controlled transparency.
2Adaptability or versatility
If the core network entities have full visibility and control of bearer splitting decisions, then charging policies and QoS differentiation can be implemented, but the radio access network loses autonomy in managing bearer splitting based on real-time radio resource status
Solution Approach 1:
The patent implements dynamic control by introducing RAT-specific usage indication fields that can be flexibly configured for different bearers. The radio access network can dynamically adjust bearer splitting based on real-time radio conditions while the core network maintains policy control through the indication fields, creating a dynamic balance between autonomy and control.
Solution Approach 2:
The patent changes the QoS parameter structure by adding RAT-type usage indication fields to PQQI and 5QI parameters. This parameter modification enables the core network to control bearer splitting decisions while maintaining the autonomous management interface, resolving the contradiction through parameter-level control.
3Productivity
If differentiated charging rates and QoS policies are implemented for LTE and NR usage, then operator revenue management and service differentiation are improved, but the system complexity increases due to the need for core network control mechanisms
Solution Approach 1:
The patent applies local quality by introducing RAT-specific indication fields only where needed in the QoS parameter structure. This localized modification enables differentiated charging and QoS policies without requiring comprehensive system-wide changes, thereby limiting the increase in system complexity to specific parameter areas.
4Speed
If the bearer splitting is controlled autonomously by radio access network based on radio resource status, then real-time resource optimization is achieved, but the core network cannot obtain knowledge on how UE is served by LTE or NR for charging purposes
Solution Approach 1:
The patent implements feedback by incorporating RAT-specific usage indication fields in QoS parameters that provide the core network with visibility into how UE is served by different access technologies. This feedback mechanism allows the core network to obtain charging-relevant information while the radio access network maintains autonomous real-time resource optimization.
Data Source
AI summary
This invention relates to a method for Core Network (CN) controlled traffic transmission in a dual/multiple-connectivity system. The method comprises the following steps: receiving a request containing information about a status of dual/multiple connectivity from the radio access network node; determining and providing a policy on a usage of dual/multiple connectivity to the radio access network node. This invention also relates to a system of Core Network (CN) controlled traffic transmission for a dual/multiple-connectivity, an apparatus for Core Network (CN) controlled traffic transmission in a dual/multiple-connectivity system and a non-transitory computer-readable medium with executable instructions for executing the method.