Dynamic Cache Invalidation Scheme in IR-Based Wireless Environments

Traditional cache invalidation schemes are not suitable to be employed in wireless environments due to the affections of mobility, energy consumption, and limited bandwidth. Cache Invalidation Report (IR) is proposed to deal with the cache consistency problem. However, the main drawback of IR-based schemes is the long latency of data access because the Mobile Hosts (MHs) need to wait next IR interval for cache invalidation when the cache hit happens. In this paper, the authors propose a Dynamic Invalidation Report (DIR) to reduce the latency of data access when the MHs query data. DIR contains an early cache validation mechanism by utilizing the validation messages.