Performance comparison of cache invalidation techniques in mobile computing environment

Advancement in evolution of Internet technologies like 3G, 4G, and 5G, there is a need of good quality of service (QoS) for such wireless networks. Faster responses are required for various queries raised by mobile terminals (MTs) from any mobile computing environment. There has been many research works proposed in the past to address the QoS issue by using an Invalidation Report (IR)-based cache management schemes. In all such cases, IRs become unmanageable due to the poor utilization of available bandwidth and larger size of IRs. Broadcast times are fixed and longer due to which IR looses its effectiveness and hit ratio degrades, So, to address these issues, in this paper, we have simulated cache invalidation techniques scenario on NS2.35, peer cache invalidation techniques like Time Stamping and Update Invalidation Report based techniques are simulated and tested to show performance on basis of various parameters like Hit Ratio, Query Delay by varying cache update interval and cache size. At the end we have also suggested the future directions for such techniques.