QoE Measurement Report Delivery in Split RAN Architecture
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Solution Overview
Problem
In cellular communications systems with a split Radio Access Network (RAN) architecture, there is a challenge in configuring and executing Quality of Experience (QoE) measurement report delivery, particularly in scenarios with CU-DU and CU-CP - CU-UP splits, where it is unclear how measurement report delivery can be effectively managed.
Innovation Solution
The proposed solution involves setting up dedicated bearers for QoE measurement reporting through E1 and F1 signaling, configuring special QoS attributes, and using new Protocol Data Unit (PDU) types to ensure efficient delivery of QoE measurement reports over the user plane, allowing for faster reaction times and improved network resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QoE measurement reports are delivered over the control plane, then delivery reliability is ensured, but control plane resources become congested and delivery speed decreases
Solution Approach 1:
The patent segments the delivery path for QoE measurement reports by introducing dedicated bearers that separate control plane and user plane traffic. This allows QoE reports to be delivered over dedicated user plane bearers, preventing control plane congestion while maintaining reliable delivery through dedicated resources.
Solution Approach 2:
The patent introduces dedicated bearers as an intermediary mechanism between the control plane and user plane. These dedicated bearers act as a specialized channel that mediates QoE report delivery, allowing efficient user plane transmission while maintaining control plane integrity.
2Productivity
If dedicated bearers are set up for QoE measurement reporting, then delivery speed increases, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring dedicated bearers for QoE measurement reporting before actual measurements begin. The bearer setup, QoS parameter configuration, and reporting criteria are all established in advance through network signaling, enabling fast QoE report delivery without complex real-time decisions.
Solution Approach 2:
The patent utilizes parameter changes by configuring specific QoS parameters for dedicated bearers, including priority levels, guaranteed bit rates, and packet loss thresholds. These parameter configurations enable differentiated handling of QoE reports while maintaining manageable system complexity through standardized parameter sets.
3Measurement precision
If QoS attributes are configured for dedicated bearers, then measurement precision improves, but configuration complexity increases
Solution Approach 1:
The patent applies parameter changes by configuring specific QoS parameters for dedicated bearers, including priority levels, guaranteed bit rates, and packet loss thresholds. These parameter configurations enable differentiated handling of QoE reports while maintaining manageable system complexity through standardized parameter sets.
Solution Approach 2:
The patent implements feedback mechanisms where the network monitors QoE report delivery performance and adjusts QoS parameters accordingly. This feedback loop ensures measurement precision is maintained while avoiding overly complex manual configuration by allowing dynamic parameter optimization based on observed performance.
4Reliability
If QoE reports are forwarded to multiple nodes, then network resilience improves, but message routing complexity increases
Solution Approach 1:
The patent extracts the routing decision logic from individual nodes by implementing a centralized forwarding configuration mechanism. The network controller determines which nodes should receive QoE reports and configures forwarding rules accordingly, simplifying individual node operations while maintaining network-wide resilience through multiple delivery paths.
Data Source
AI summary
Systems and methods are disclosed that relate to Quality of Experience (QoE) measurement reporting in a cellular communications system having a split, or distributed, Radio Access Network (RAN) architecture. In one embodiment, a method performed in a RAN having a distributed RAN architecture comprises, at a control plane part of a central unit (CU-CP) of a base station of the RAN, sending one or more first messages to a user plane part of the central unit (CU-UP) to setup or modify one or more bearers and sending one or more second message to a distributed unit (DU) of the base station to setup or modify the one or more bearers.