Predictive Data Caching for Wireless Zone Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication networks face challenges in maintaining continuous data coverage in temporarily unreachable zones, such as elevators, where user terminals experience disconnection due to changing signal availability, leading to poor quality-of-service and increased end-to-end transmission delays.
Innovation Solution
A serving wireless communication node predicts data to be transmitted to a user terminal when it enters an unreachable zone and transfers this data to a cache node positioned within the zone, enabling the cache node to provide continuous data service even when the user terminal is unreachable, with handover mechanisms ensuring seamless data transfer and prioritizing the cache node during signal availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the serving node continues to serve the user terminal in a temporarily unreachable zone, then the user terminal can access data, but the serving node must allocate extensive resources to a link with very poor signal-to-noise ratio, reducing network efficiency
Solution Approach 1:
The serving node predicts which data will be needed by the user terminal before the terminal enters the unreachable zone. This preliminary prediction allows the network to prepare and cache necessary data in advance, so when the terminal becomes unreachable, the data is already available at the cache node without requiring continuous resource allocation from the serving node to maintain poor signal quality connections.
Solution Approach 2:
A cache node is introduced as an intermediary between the serving node and the user terminal. The cache node stores predicted data and serves the user terminal directly when the terminal is in the unreachable zone, eliminating the need for the serving node to maintain resource allocation to the poor signal quality link while still providing continuous data service.
2Reliability
If the serving node allocates extensive resources to maintain connection in an unreachable zone with poor signal-to-noise ratio, then continuous data service can be provided, but the end-to-end transmission delay of long files increases
Solution Approach 1:
The system performs preliminary data prediction and caching before the user terminal enters the unreachable zone. By anticipating which data will be needed and preparing it in advance at the cache node, the system eliminates the need for sequential transmission of long files through the poor signal quality link, thereby reducing transmission delay while maintaining continuous service availability.
Solution Approach 2:
The cache node acts as an intermediary that stores predicted data locally. When the user terminal is in the unreachable zone, the cache node can serve data requests directly from its local cache rather than transmitting through the serving node over the poor signal quality link, significantly reducing end-to-end transmission delay for long files.
3Adaptability or versatility
If the network uses traditional handover mechanisms for user terminals entering unreachable zones, then the user terminal can be served by alternative nodes, but disconnection periods occur and quality-of-service deteriorates
Solution Approach 1:
The serving node performs preliminary prediction of data needs before the user terminal enters the unreachable zone. This allows the system to prepare data for caching in advance, so when handover to the cache node occurs, the data is already available and the terminal can continue receiving service without disconnection gaps, thereby improving service continuity while maintaining handover adaptability.
Solution Approach 2:
The cache node is introduced as an intermediary that bridges the serving node and the user terminal during unreachable periods. Instead of traditional handover that may cause disconnection, the cache node maintains continuous service by storing predicted data and serving the terminal directly, eliminating disconnection periods while preserving the ability to adapt to zone accessibility changes.
Data Source
AI summary
The present disclosure relates to a serving wireless communication node (AP1) in a wireless communication system (1), wherein the serving node (AP1) is adapted to determine that a served user terminal (2) is going to enter a zone (3) that switches between being reachable and unreachable for the serving node (AP1), and to predict data (xm+1 . . . xn) to be transmitted to the user terminal (2) for at least a part of the time the user terminal (2) is in the zone (3) and is unreachable for the serving node (AP1). When the zone (3) is reachable, the sewing node (AP1) is adapted to transfer predicted data (xm+1 . . . xn) to a cache node (APC) positioned within the zone (3), enabling the cache node (APC) to transfer the predicted data (xm+1 . . . xn) to the user terminal (3) when the user terminal (2) is in the zone (3) and is unreachable for the serving node (AP1).