eNB Traffic Dispatch via Backhaul Offload
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Solution Overview
Problem
LTE-A networks face challenges in maintaining good quality of experience for user equipment (UEs) as traffic load increases, leading to potential degradation in service quality due to insufficient bandwidth handling capabilities.
Innovation Solution
Implementing a traffic dispatch scheme between first and second eNBs, where the first eNB uses a predict module and a split decision module to estimate and manage traffic distribution based on measurement reports from UEs and status reports from second eNBs, utilizing backhaul connections to offload traffic and optimize network throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traffic load increases in LTE-A network, then network capacity utilization improves, but quality of experience for UEs deteriorates
Solution Approach 1:
The network traffic is segmented and distributed across multiple eNBs (first eNB and second eNB). The first eNB handles control plane services while the second eNB handles user plane services, dividing the traffic load to prevent any single eNB from becoming overloaded and degrading QoE.
Solution Approach 2:
The patent introduces a new dimension of traffic management by implementing dual connectivity architecture where UEs can connect to both first eNB and second eNB simultaneously. This dimensional expansion allows traffic to be routed through multiple paths, maintaining QoE even when overall network load increases.
2Productivity
If more bandwidth is allocated to handle heavy traffic, then network throughput improves, but device complexity increases
Solution Approach 1:
The first eNB acts as an intermediary between the core network and the second eNB. It receives control plane signals from the core network and user plane data, then forwards appropriate traffic to the second eNB, simplifying the overall network architecture while enabling enhanced throughput.
Solution Approach 2:
The first eNB performs multiple functions including control plane processing, user plane processing, and traffic routing to the second eNB. This multi-functionality reduces the need for separate dedicated devices, managing complexity while maintaining high throughput capability.
3Reliability
If traffic is offloaded from first eNB to second eNB, then quality of experience is maintained, but backhaul connection requirements increase
Solution Approach 1:
The first eNB predicts future traffic conditions and proactively offloads traffic to the second eNB before the first eNB becomes overloaded. This preliminary action prevents QoE degradation while optimizing backhaul utilization by distributing traffic in advance rather than reacting to congestion.
Solution Approach 2:
The system implements feedback mechanisms where the first eNB monitors traffic conditions and dynamically adjusts the amount of traffic offloaded to the second eNB. This feedback control ensures QoE is maintained while optimizing backhaul connection capacity utilization.
Data Source
AI summary
A traffic dispatch method of a first eNB comprises the following steps: generating an estimation result according to measurement reports of a plurality of user equipments (UEs), wherein parts of the measurement reports are provided by a second eNB connected to the first eNB through a backhaul connection and parts of the measurement reports are provided by parts of the UEs, wherein coverage area of the second eNB is encompassed by the first eNB; receiving a status report from the second eNB; and making a traffic split decision according to the estimation result and the status report of the second eNB to dispatch traffic to the second eNB through the backhaul connection.