Hybrid Access Handover Control for Low Latency
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low latency, particularly in hybrid access scenarios where handovers can lead to data flow interruptions due to overlapping radio connection handovers, making it difficult to meet latency requirements for applications like autonomous vehicles.
Innovation Solution
Implementing a system that controls multiple wireless interfaces to maintain non-overlapping handovers by synchronizing the timing of handovers across different radio connections, using techniques such as delaying measurement reports and configuring different time windows for handovers, ensuring uninterrupted data traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple radio connections are maintained for hybrid access to reduce latency, then bandwidth and latency performance are improved, but handover interruptions occur when handovers overlap in time
Solution Approach 1:
The system performs preliminary actions by delaying measurement reports and preparing handover configurations before actual handover execution. The network element controls handover timing by scheduling measurement report transmissions and configuring handover parameters in advance, ensuring that handovers are coordinated and do not overlap, thus preventing service interruptions while maintaining low latency
Solution Approach 2:
The system dynamically adjusts handover timing parameters based on real-time conditions. The network element monitors the status of multiple radio connections and dynamically modifies measurement report delays and handover execution timing to ensure non-overlapping handovers. This dynamic control allows the system to adapt to changing network conditions while maintaining reliable service quality during handovers
2Reliability
If handover timing is controlled to execute non-overlapping handovers, then service quality and reliability are improved, but handover coordination complexity increases
Solution Approach 1:
The network element acts as an intermediary that centralizes handover control functionality. It receives measurement reports from the user terminal, determines appropriate handover timing, and sends control decisions to coordinate handovers across multiple radio connections. This intermediary approach simplifies the overall system by consolidating complex timing coordination logic in a single entity rather than distributing it across multiple devices
Solution Approach 2:
The system implements feedback mechanisms where the network element monitors handover execution status and adjusts future handover timing based on observed performance. Measurement reports provide feedback about radio conditions, and the network element uses this feedback to optimize handover scheduling, ensuring non-overlapping handovers while adapting to changing network conditions
Data Source
AI summary
A solution for handover control in communication system is disclosed, the solution comprising controlling (300) more than one wireless interfaces configured to maintain more than one radio connection connecting the apparatus to one or more networks, the more than one radio connection being related to a same service and controlling (302) timing of handovers of the different radio connections to execute non overlapping handovers in time.