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Replacement based content popularity and cache gain for 6G Content-Centric network

机译：基于内容为中心的网络的更换内容流行度和缓存增益

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摘要

In Content-Centric network (CCN), the capacity of router nodes caches the contents to satisfy the requests from subsequent consumers, and reduce the network overhead. Considering the limited cache capacity, the update of cached contents becomes a key element affecting the caching performance for the future 6G network. In this paper, a replacement strategy based content popularity and cache gain (PGR) is proposed for 6G-CCN. In the proposed scheme, the popularity of contents in the current cycle is determined according to the time interval and frequency of consumers' requests. In addition, the distance between the router node and consumer affects the gain of caching. Further considering the dynamic popularity of content and gain of caching, a realistic content value function is provided. When the cache space reaches the upper bound, for the router node, the existing content with lower value will be replaced by newly arrived content with a higher value. Simulation results show that, compared with the conventional least frequently used (LFU) and least recently used (LRU), the proposed replacement strategy can effectively improve the space utilization and cache hit rate of router nodes, as well as reduce the average hops of consumers' content acquisition for 6G-CCN. (C) 2020 Elsevier B.V. All rights reserved.
机译：在以内容为中心的网络（CCN）中，路由器节点的容量缓存内容以满足来自后续消费者的请求，并减少网络开销。考虑到有限的缓存容量，缓存内容的更新成为影响未来6G网络缓存性能的关键元素。在本文中，提出了一种基于替代策略的内容流行度和高速缓存增益（PGR），用于6G-CCN。在所提出的方案中，根据消费者请求的时间间隔和频率确定当前周期中的内容的普及。此外，路由器节点和消费者之间的距离会影响缓存的增益。进一步考虑到内容的动态普及和高速缓存的增益，提供了一个现实的内容值函数。当缓存空间到达上限时，对于路由器节点，具有较低值的现有内容将被新到达的内容更换，具有更高的值。仿真结果表明，与传统最少使用（LFU）和最近使用的（LRU）相比，所提出的替换策略可以有效地提高路由器节点的空间利用率和高速缓存命中率，以及减少消费者的平均跳跃'6G-CCN的内容采集。 （c）2020 Elsevier B.v.保留所有权利。

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