Cache Synchronization Dispersion Parameters for Wireless Handovers
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Solution Overview
Problem
Existing cache synchronization systems face challenges in maintaining seamless content transmission and Quality of Service (QoS) during handovers in wireless networks, particularly due to inefficient load management and synchronization methods that can lead to interruptions or delays.
Innovation Solution
A cache synchronization system comprising a cache controller and local caches that manage synchronization policy and position information to set a synchronization range using dispersion parameters, allowing for efficient content propagation and load dispersion across neighboring caches, ensuring continuous service during handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cache synchronization is performed across all local caches in a wireless network, then content availability during handovers is improved, but system complexity and synchronization overhead increase significantly
Solution Approach 1:
The patent applies local quality by differentiating synchronization behavior based on content characteristics. Different dispersion parameters are assigned to different content items, allowing the system to synchronize content selectively based on its importance, size, and access patterns rather than applying uniform synchronization to all content, thus reducing overall system complexity while maintaining reliability for critical content
Solution Approach 2:
The patent introduces dispersion parameters as a configurable variable to control synchronization range. By adjusting this parameter, the system can dynamically modify the extent of content propagation across caches, enabling flexible trade-offs between content availability and synchronization overhead based on network conditions and content priorities
2Reliability
If content is synchronized to multiple local caches to ensure continuous service during handovers, then Quality of Service is improved, but network bandwidth consumption and synchronization time increase
Solution Approach 1:
The patent implements partial action by synchronizing content to only the necessary number of caches based on the dispersion parameter, rather than propagating content to all possible caches. This selective synchronization reduces the time required for content distribution while still ensuring adequate coverage for handover scenarios
Solution Approach 2:
The system performs preliminary synchronization of content to neighboring caches before handovers occur, using the dispersion parameter to pre-determine the synchronization range. This advance preparation ensures content is available when needed without requiring real-time synchronization during actual handover events, thereby reducing perceived synchronization time
3Reliability
If dispersion parameter is increased to expand synchronization range, then content availability across network is improved, but load on individual caches and network increases
Solution Approach 1:
The patent applies local quality by assigning different dispersion parameters to different content items based on their characteristics. Popular or critical content receives higher dispersion parameters for wider distribution, while less important content has lower dispersion parameters, optimizing the distribution of data load across caches according to actual content priorities and access patterns
Data Source
AI summary
Disclosed are a cache synchronization system, a cache synchronization method and a local cache to perform synchronization. The local cache is configured to determine whether to perform synchronization for specific content on the basis of synchronization policy information, if it is determined that synchronization is to be performed, to set a dispersion parameter that defines a synchronization range for the specific content according to the synchronization policy information, and to transmit synchronization information about the specific content, which includes the dispersion parameter, to at least one neighboring local cache.