N-PreTG: A network-based approach to optimize handoff performance of Universal Network

Universal Network is a new Internet architecture which can provide the better mobility support by splitting the identifier and location of traditional IP address. However, the current mobility support is triggered by communicating data, which may increase handover delay if there is no packets transmission after the handover. In this paper, we analyze the mobility management proposals for traditional IP networks and the Universal Network, and propose a novel approach, named by N-PreTG (Network-based Pre-Trigger) to optimize handoff performance N-PreTG considers two important factors. First, it is a network-based approach which means any mobile terminal running standard protocol stacks needs not to do any changes. Second, it uses Pre-Trigger, which detects the attachment status via Layer 2 frames and notifies related entities to update mapping relationship earlier, to decrease the handoff latency. To evaluate its performance, we implement the proposed approach in our test-bed, and test its performance under different mobile devices to verify the compatibility of this approach. The experimental results show that N-PreTG reduces handoff delay by an average of 500ms, has a good stability and improves the quality of communication for mobile users.