Cluster‐Based Cooperative Cache Deployment and Coded Delivery Strategy in C‐V2X Networks

Abstract

Cellular vehicle-to-everything- (C-V2X-) based communications can support various content-oriented applications and have gained significant progress in recent years. However, the limited backhaul bandwidth and dynamic topology make it difficult to obtain the multimedia service with high-reliability and low-latency communication in C-V2X networks, which may degrade the quality of experience (QoE). In this paper, we propose a novel cluster-based cooperative cache deployment and coded delivery strategy for C-V2X networks to improve the cache hit ratio and response time, reduce the request-response delay, and improve the bandwidth efficiency. To begin with, we design an effective vehicle cluster method. Based on the constructed cluster, we propose a two-level cooperative cache deployment approach to cache the frequently requested files on the edge nodes, LTE evolved NodeB (eNodeB) and cluster head (CH), to maximize the overall cache hit ratio. Furthermore, we propose an effective coded delivery strategy to minimize the network load and the ratio of redundant files. Simulation results demonstrate that our proposed method can effectively reduce the average response delay and network load and improve both the hit ratio and the ratio of redundant files.

Cooperative caching strategy based mobile vehicle social‐aware in internet of vehicles

“…The existing research work on edge caching strategies in IoV focuses on the design of cooperative caching strategies between edge devices. In Reference 8, the authors selected vehicle cluster heads as cache nodes based on average relative speed, distance, and link availability. And they proposed a cooperative caching approach to reduce system latency.…”