In view of the problem faced in Aviation Information Network (AIN) that the unbalanced load of platforms caused by the dynamically arrived service function chains (SFCs), we formulate the SFC migration problem into a multi-objective optimization model and propose a coalitional game based migration algorithm (CGM). In this paper, we take the aviation platform as the game player, the virtual network function (VNF) as the game commodity, and perform the migration of VNFs through the comparation and swap between different platforms to realize the efficient management of network resources. Experimental results show that the proposed algorithm has the advantages of low computational complexity and fast convergence rate, which can effectively reduce the network energy consumption and migration overhead.
Based on non-regenerative relays, the bit error probability expressions of CSI-assisted relay and
fixed-gain relays for high altitude platform multi-hop optical communication is given. The effect of the factors, including
atmospheric turbulence pointing error and relay node position, on the performance of multi-hop optical links is analyzed.
The simulation results show that the influence of atmospheric turbulence on optical links is greater than that of pointing
error. The improvement of average SNR per hop and transmit power on multi-hop optical communications may be
restricted by pointing error. Compared to CSI-assisted relay, fixed-gain relay is suited to more hops links with the
condition of high average SNR per hop.
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