I am confused about the definition of heterogeneity in sensor node. Some papers define the heterogeneity that the sensor node has more resources (i.e., more memory, high-bandwidth and more energy) and others define it that the sensor nodes have different resources (i.e., different memory capacities, different bandwidths and different energies).
With an example, it can be clarified.
Let there be different number of sensors are deployed in a hierarchical manner.In this case, the leaf nodes are typically energy-constraint, and we do not require much memory in these nodes. Now, consider the nodes which are at the top level. These nodes should have larger memory to store and process information from their child nodes. However, they can be charged. So, we have at least two types of nodes with different properties - energy and memory. Such a sensor network can be treated as heterogeneity sensor networks.
Dear Moahmmed Qasem Al-Maolegi
Heterogeneity means different resources of nodes i.e energy, memory, bandwidth etc,
With an example, it can be clarified.
Let there be different number of sensors are deployed in a hierarchical manner.In this case, the leaf nodes are typically energy-constraint, and we do not require much memory in these nodes. Now, consider the nodes which are at the top level. These nodes should have larger memory to store and process information from their child nodes. However, they can be charged. So, we have at least two types of nodes with different properties - energy and memory. Such a sensor network can be treated as heterogeneity sensor networks.
The heterogeneity quite contextual in WSN. In case of hardware terms, there might be different kind of communication protocol, MAC layer, memory, Computing architecture. In abstract or higher level of thinking you may can consider different numbers of neighbors surrounding by a node might be different than others, in this way either of the nodes are heterogenous to each other. Might be those nodes neighbors are pushing traffics on different rates or moving fast or slow etc. These contextual differences make WSN also heterogenous.
Very good question you asked. I got this answer after a long time. Whenever you simulate any network, most of the time we simulate all nodes having same properties (for instance, internal memory, processing speed, power consumption etc.). In real scenario, all nodes will have different values for all properties.
For example, in any network if we use 100 nodes with same energy level, after some time all nodes will not have same remaining energy.
So, when we simulate any network, heterogeneity of the nodes should be maintain to get realistic kind of the results.
if there will be difference in at least in one of the resources of the node such as energy , bandwidth, and memory capacity then that is Heterogeneous WSN
Heterogenous WSN: It means that the network contains different types of sensors in terms of sensors' activities, batteries, memory and so on.
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