Hiren Kumar Deva Sarma

Learn More
Wireless Sensor Network Systems can be applied to monitor different environments ranging from military to civil applications. It has been observed that different protocols required for smooth functioning of the network system are highly application specific. Another important fact is that the communication protocols have significant role in achieving right(More)
Wireless sensor network (WSN) is an emerging field. Theses are normally designed to perform a set of high level information processing tasks, for example detection, tracking or classification. Different application areas of WSNs are environmental monitoring, industrial sensing and diagnostics, infrastructure protection, battle field awareness, context aware(More)
Wireless sensor networks (WSNs) are required to provide different levels of Quality of Services (QoS) based on the type of applications. Providing QoS support in wireless sensor networks is an emerging area of research. Due to resource constraints like processing power, memory, bandwidth and power sources in sensor networks, QoS support in WSNs is a(More)
In this paper, we present a novel energy efficient routing protocol for wireless sensor networks in which the sensor nodes as well as the base station are mobile. The protocol is hierarchical and cluster based from network structure perspective. Each cluster contains one cluster head node and two deputy cluster head nodes. The re-clustering time and energy(More)
In Cognitive Radio Network (CRN) Cognitive Users (CUs also called Secondary Users (SUs)) make use of frequency band used by Primary Users (PUs) in an opportunistic way. Routing in CRN is a challenging job because the packets within SUs need to be routed only when channels of PUs are idle. The CRN routing protocols proposed so far, does not assume that the(More)
In this paper, a route selection mechanism for cognitive radio network (CRN)is proposed where the route construction process selects only those channels which have the maximum probability of being stable. By the term stable channel, we mean that the channel will not be claimed by primary users (PUs) frequently. A probabilistic approach for finding the(More)
Cognitive Radio Networks (CRNs) increase spectrum utilization by opportunistically sharing licensed spectrum with cognitive capable devices. There are many routing algorithms proposed for CRNs so far. Most of these algorithms discover single path from source to destination and consume considerable amount of bandwidth during route discovery. On the other(More)