Cache Device Handover Detection via Retransmission Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Content Delivery Network (CDN) technologies lack an effective method for detecting handovers of user terminals during content transmission in mobile networks, which can lead to data loss and transmission delays due to the lack of recognition of network structures and characteristics.
Innovation Solution
A cache device and cache control device system that monitors content retransmission requests from user terminals, extracts terminal address information, and compares it with stored access information to detect handovers, allowing for notification to other cache devices and seamless content transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CDN service is applied to mobile networks without handover detection, then content delivery is provided, but data loss and transmission delays occur due to undetected handovers
Solution Approach 1:
The cache device monitors content retransmission request messages from user terminals and uses this feedback to detect handovers. When a retransmission request is received, the device extracts terminal address information and checks it against stored terminal access information to determine if a handover has occurred, enabling reliable content delivery continuity
Solution Approach 2:
The cache device stores terminal access information including terminal address information and cache device identification information before handover occurs. This preliminary storage of access information enables the device to quickly detect and respond to handovers by comparing current requests against stored information
2Productivity
If CDN service is applied to mobile networks without handover detection, then content delivery is provided, but transmission delays occur
Solution Approach 1:
The system uses feedback from content retransmission request messages to detect handovers in real-time. By monitoring these messages and comparing terminal address information against stored access information, the system identifies handovers and can switch cache devices promptly, reducing transmission delays
Solution Approach 2:
The cache device acts as an intermediary between the user terminal and the content delivery network. It monitors communication between terminals and other cache devices, detecting handovers through retransmission requests and facilitating seamless content transfer to maintain access speed
3Measurement precision
If handover detection is implemented by monitoring content retransmission requests and comparing terminal address information, then handover detection accuracy is improved, but device complexity increases
Solution Approach 1:
The cache device performs handover detection using its own monitoring capabilities and stored terminal access information. By self-managing the detection process through comparing terminal address information from retransmission requests against stored data, the device achieves accurate handover detection without requiring complex external systems
Solution Approach 2:
The cache device uses existing terminal access information storage for multiple purposes: both for normal content delivery operations and for handover detection. This multi-functionality allows accurate handover detection without adding separate complex detection systems, as the same stored information serves dual purposes
Data Source
AI summary
For a user terminal connected to one of cache devices distributed in a network and receiving contents, terminal access information including terminal address information about the user terminal and identification information of the cache device is stored and managed. If a content retransmission request message of the user terminal is detected at other cache device, this is regarded as a handover of the user terminal. This allows a simple detection of handover that occurs during content transmission.