Mixed Micro/Macro Cache for Device-to-Device Caching Systems in Multi-Operator Environments
Minjoong Rim
TL;DR
This paper explores combining micro and macro caching in device-to-device systems to improve network efficiency in multi-operator environments.
Contribution
The study introduces a mixed micro/macro caching strategy for D2D systems with multiple operators and evaluates its performance.
Findings
Combining micro and macro caching improves performance in multi-operator D2D systems.
Micro caching is effective when users continue viewing content and updates are frequent.
Performance benefits increase when operators are independently under low load.
Abstract
In a device-to-device (D2D) caching system that utilizes a device’s available storage space as a content cache, a device called a helper can provide content requested by neighboring devices, thereby reducing the burden on the wireless network. To enhance the efficiency of a limited-size cache, one can consider not only macro caching, which is content-based caching based on content popularity, but also micro caching, which is chunk-based sequential prefetching and stores content chunks slightly behind the one that a nearby device is currently viewing. If the content in a cache can be updated intermittently even during peak hours, the helper can improve the hit ratio by performing micro caching, which stores chunks that are expected to be requested by nearby devices in the near future. In this paper, we discuss the performance and effectiveness of micro D2D caching when there are multiple…
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Taxonomy
TopicsCaching and Content Delivery · Advanced Data Storage Technologies · IoT and Edge/Fog Computing