Survivable Virtual Sensor Networks Embedding Strategy for Link Failures

Abstract

The introduction of network virtualization into wireless sensor networks can effectively improve resource utilization. However, in a virtualized environment, the failure of the physical layer will affect the availability of virtual sensor networks, resulting in network service interruption. Aiming at the virtual sensor network mapping problem under the condition of link failure in the physical network, a virtual sensor network survivability embedding model is constructed, and a differentiated service survivability virtual network embedding algorithm is proposed. For high-priority virtual sensor network requests, a protection mechanism is adopted to construct a protection path for the virtual sensor network during virtual network mapping; for low-priority virtual sensor network requests, a fault virtual line migration strategy based on link availability is proposed. Migration strategy to maximize the integrity of the virtual sensor network and the continuity of network services. Simulation results show the superiority of the proposed algorithm in the fault recovery rate and resource utilization of the virtual sensor network.