Steady-State Availability Evaluation for Heterogeneous Edge Computing-Enabled WSNs with Malware Infections

Table 1

Symbols.

Symbol	Description
	Number of HSNs in HECWSNs infected by malware.
	State set of an HSN in HECWSNs infected by malware.
	Probability of an HSN being in state at time .
	Probability of an HSN changing from state to at time .
	Degree of an HSN.
	Initial infection probability of an HSN with degree .
	Number of neighbour nodes in active state of an HSN.
	Number of malware attacks on an HSN.
	Optimal infection probability of malware.
	Death probability of an HSN.
	Update probability of dead HSNs.
	Probability of an HSN changing from state R to S.
	Detection rate of the IDS.
	Probability of an HSN transitioning into state .
	Steady-state probability of an HSN staying in state .
	State transition matrix of an HSN.
	Steady-state availability of an HSN with degree of type with topology .
	Total number of common sensor nodes connecting to a sink sensor node in HECWSNs with star topology.
	Minimum number of common sensor nodes connecting to a sink sensor node in HECWSNs with star topology.
	Number of common working sensor nodes connecting to a sink sensor node in HECWSNs with star topology.
	Steady-state availability of a sink sensor node with degree in HECWSNs with star topology.
	Steady-state availability of HECWSNs with star topology.
	Total number of common sensor nodes connecting to a cluster sensor node in HECWSNs with cluster topology.
	Steady-state availability of a cluster head node in HECWSNs with cluster topology.
	Steady-state availability of a common sensor node in a cluster in HECWSNs with cluster topology.
	Steady-state availability of a sink sensor node in HECWSNs with cluster topology.
	Total number of cluster head nodes connecting to a sink sensor node in HECWSNs with cluster topology.
	Minimum number of cluster head nodes to which a sink sensor node needs to connect in HECWSNs with cluster topology.
	Number of cluster head working nodes connecting to a sink sensor node in HECWSNs with cluster topology.
	Steady-state availability of HECWSNs with cluster topology.
	Total number of common sensor nodes connecting to a sink sensor node in HECWSNs with mesh topology.
	Minimum number of common sensor nodes to which a sink sensor node needs to connect in HECWSNs with mesh topology.
	Number of common sensor nodes connecting to a sink sensor node in HECWSNs with mesh topology.
	Total number of sink sensor nodes in HECWSNs with mesh topology.
	Minimum number of sink sensor nodes that are required for normal work in HECWSNs with mesh topology.
	Number of sink working sensor nodes in HECWSNs with mesh topology.
	Steady-state availability of a common sensor node in HECWSNs with mesh topology.
	Steady-state availability of a sink sensor node in HECWSNs with mesh topology.
	Steady-state availability of HECWSNs with mesh topology.