DCIM: Distributed Cache Invalidation Method for Maintaining Cache Consistency in Wireless Mobile Networks Partial Doc , For more project contact : Ambitlick@gmail.com , PH : 8940956123

1. DCIM: DISTRIBUTED CACHE
INVALIDATION
METHOD FOR MAINTAINING CACHE
CONSISTENCY IN
WIRELESS MOBILE NETWORKS

2. ABSTRACT:
 In mobile ad hoc networks (MANETs) DCIM that is totally
client-based.
 DCIM is a pull-based algorithm that implements adaptive
time to live (TTL), piggybacking, and pre-fetching, and
provides near strong consistency capabilities.
 Cached data items are assigned adaptive TTL values that
correspond to their update rates at the data source, where
items with expired TTL values are grouped in validation
requests to the data source to refresh them, whereas unexpired
ones but with high request rates are pre-fetched from the
server.
 DCIM is analyzed to assess the delay and bandwidth gains (or
costs) when compared to polling every time and push-based
schemes.

3. EXISTING SYSTEM :
1. Distributed cache invalidation mechanism
2. COACS Architecture
3. Push-based mechanisms
4. Pull-based approaches

4. PROPOSED SYSTEM :
 Hybrid mechanisms (Client – server Authentication)
 MD5 Algorithm
 Time to live (TTL)
 A data which stores in cache will be expired if it
has not used within threshold time since last
update
 Simplicity, good performance, flexibility to assign
TTL values

5. OVERALL BLOCK DIAGRAM :
ServerQD (query directories) Caching nodes
Network Failure
Request Response
1. Cache Consistency Algorithm
2. Time to live
3. Bit sequence Algorithm
Invalidation Server
Bandwidth Utilization
Cache Delay
Average Time
MD5 – Algorithm

6. MODULES
1. Design of caching architecture
2. Parameter functions of COACS in MANETs
3. Client- Server Update Mechanism
4. Implementation of MD5 algorithm
5. Performance Analysis
 Query delay
 Overhead traffic

7. REFERENCES
[1] T. Andrel and A. Yasinsac, “On Credibility of MANET
Simulations,” IEEE Computer, vol. 39, no. 7, pp. 48-54, July
2006.
[2] H. Artail, H. Safa, K. Mershad, Z. Abou-Atme, and N.
Sulieman, “COACS: A Cooperative and Adaptive Caching
System for MANETS,” IEEE Trans. Mobile Computing, vol.
7, no. 8, pp. 961- 977, Aug. 2008.
[3] D. Barbara and T. Imielinski, “Sleepers and Workaholics:
Caching Strategies for Mobile Environments,” Proc. ACM
SIGMOD, pp. 1- 12, May 1994.
[4] G. Cao, “A Scalable Low-Latency Cache Invalidation Strategy
for Mobile Environments,” IEEE Trans. Knowledge and Data
Eng.,vol. 15, no. 5, pp. 1251-1265, Sept./Oct. 2003.
[5] D. Li, P. Cao, and M. Dahlin, “WCIP: Web Cache Invalidation
Protocol,” IETF Internet draft, http://tools.ietf.org/html/draft-
danli-wrec-wcip-01 , Mar. 2001.