Efficient Bandwidth Utilization in Mobile Environments for Cache Consistency Using Queried Data (CCUQD) Approach

摘要

Mobile computing is becoming extremely popular due to its mobility and portability features, but it is impinged with low bandwidth and high latency problems. To cope with the bandwidth and latency problems, mobile units (MU) go for a novel technique called caching. Consistency in cache can be achieved by the cache invalidation strategies. In this paper we propose a novel algorithm called Cache Consistency Using Queried Data (CCUQD) which maintains cache consistency by broadcasting IRs periodically and maximizes bandwidth utilization by making a batch and delaying the broadcast of queried data (QD) by the MU to the server. Latency is handled by immediately broadcasting those data items that have been queried by maximum number of MUs. Hence the data is broadcasted only once for a number of requests which utilizes the bandwidth efficiently. The cache hit ratio of other MU is also increased by pre fetching the data items that have been broadcasted.