Design of a Caching Replacement Policy Based on Cooperative Trust for Ubiquitous Computing Networks
Ye Hu · Journal of Changsha University · 2013
A great amount of data flow with nodes movement in ubiquitous computing network when wireless devices are carried by humans.The nodes have the problem of how to choose the latest or the most valuable data to cache.Therefore,the design of corresponding cache data replacement policy is an important issue.In this paper,a cache data replacement policy that uses cooperative trust relationship of node is proposed referred as CTRP.CTRP chooses the data item to replace based on the correlation between the nodes and the data item.It utilizes the trust degree and the probability of destination-matching to judge the correlation.Moreover,the visit and update frequency ratio is used to design the standard of cache data replacement.The simulation results show that our policy can improve the cache hit ratio of data and reduce the data latency of remote data access effectively.