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In wireless communication for data integrity hash functions are commonly used. It is also an important cryptographic primitives, which is very critical for data integrity assurance and data origin authentication in security services. SHA hash functions are set of cryptographic hash function designed by NSA. SHA-1 produces message digest that of is 160 bits long. Later it has been identified that security...
In heavy traffic cellular networks low priority handover requests will increase handover drops. In current handover queuing schemes, slow signal strength changing mobile units with low priority handover requests can occupy the handover queue space. As a result, high priority requests will be dropped. This effect could be eliminated utilizing a new scheme called comparative queuing. Prioritization...
In this research, our aim is to increase the efficiency of individual visitors and the whole system by reducing traffic congestion in large-scale crowdpsilas activities. To achieve the goal, a route guidance mechanism with centralized information control (CIC) is proposed by granting priority to visitors using CIC. Through multi-agent simulation, we confirmed that the CIC mechanism was effective in...
Selection relaying is a promising technique for practical implementation of cooperative systems with multiple relays. However, to select the best relay, globe channel knowledge is required at the selecting entity. In this paper, we consider the relay selection problem in dual-hop amplify-and-forward (AF) communication systems with partial channel state information (CSI). We present relay selection...
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