An adaptive cache invalidation technique for wireless environments

With an evolution of Internet and related technologies such as 4G, and 5G, there is a need of fast response time for various queries raised by intermediate nodes and mobile terminals from infra structured-based/less networks. Although there has been many efforts in the past to address this issue by using an invalidation report (IR)-based cache management schemes which reduce the bandwidth requirements, and battery consumptions, but when the update rate of data at the server is high, then most of the existing approaches have long query latency due to large and fixed size of IRs, and broadcast time (BT) interval. To address these issues, in this paper, an adaptive cache invalidation technique (ACIT) is proposed. In comparison to the previous approaches, the proposed scheme uses different thresholds update rates for adaptive IR, and BT intervals. In the proposed scheme, only hot data updates in IR are recorded which results a less query delay, and bandwidth consumption. The performance of the proposed scheme was studied by extensive simulations by comparing it with the other state-of-the-art schemes using various metrics. The proposed scheme yields 1.5 times enhancement in query response time with a reduction in IR size to 25 % in comparison to other existing techniques. Moreover, there is a reduction of 119.89 % in broadcast time interval using the proposed scheme.