QoS Offset Handover Controller for Wireless Network Efficiency
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Solution Overview
Problem
Current wireless communication networks do not efficiently and effectively use Quality-of-Service (QoS) offsets to control handovers of user equipment between access nodes, leading to suboptimal handover decisions.
Innovation Solution
Implementing a handover controller that determines Quality-of-Service Flow Identifier (QFI) offsets based on performance metrics such as packet loss, scheduling delay, resource block usage, data rate, and Channel Quality Index, allowing for informed decisions on handovers between source and target access nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If serving access nodes use traditional signal strength comparison for handovers, then handover decisions are simple to implement, but handover efficiency and effectiveness are poor
Solution Approach 1:
The patent introduces QoS offsets as an additional parameter to modify the handover decision process. By changing the parameters considered in handover decisions from only signal strength to signal strength plus QoS offset, the system achieves more efficient and effective handovers while maintaining a relatively simple control mechanism.
Solution Approach 2:
The QoS offset acts as an intermediary element that mediates between the source and target access node QoS levels. This intermediary parameter enables the system to make informed handover decisions by comparing QoS differences, thereby improving handover efficiency without significantly increasing overall system complexity.
2Measurement precision
If serving access nodes consider QoS parameters for handovers, then handover decisions become more accurate, but the complexity of handover control increases
Solution Approach 1:
The patent enhances handover decision accuracy by introducing QoS offset parameters that reflect the difference in QoS levels between source and target access nodes. This parameter addition allows the system to make more accurate decisions based on both signal strength and service quality requirements.
Solution Approach 2:
The handover decision process is segmented into distinct components: signal strength measurement, QoS offset calculation, and combined decision-making. This segmentation allows each component to be optimized independently, improving overall decision accuracy while managing complexity through modular processing.
3Reliability
If the network determines QoS offset based on QoS difference between source and target access nodes, then handover performance improves, but the processing requirements increase
Solution Approach 1:
The patent improves handover reliability by determining QoS offset based on the QoS difference between source and target access nodes. This parameter-based approach ensures that handovers are made only when appropriate QoS conditions are met, thereby increasing reliability while keeping processing requirements manageable through focused calculations.
Data Source
AI summary
A wireless communication network delivers a wireless data service from a source access node and a target access node. The network determines a source QoS for the wireless data service from the source access node and a target QoS for the wireless data service from the target access node. The network determines a QoS offset based on a QoS difference between the source QoS and the target QoS. To handover a User Equipment (UE), the network receives source signal strength for the source access node and target signal strength for the target access node from the UE. In response, the network selects the target access node for the handover based on the QoS offset and a signal strength difference between the source signal strength and the target signal strength. The network signals the UE and the target access node to handover the UE to the target access node.