Abstract: Through dynamic game,we analyzed how networks asymmetric in size make a choice among interconnection models,transit or peering,and competed for users.Our paper presents that the interconnection modes of Internet backbone in our country should contain peering and transit,not only peering.Backbone networks are classified due to their different scale.The peering mode is applicable to the interconnection between backbones with similar scale,while the transit mode is better for that between backbones with asymmetric scale.Accordingly,at present,regulator should appropriately restrain the backbones with asymmetric scale adopting the peering mode,rather than promote it.

Key words: interconnection, network scale, regulatory policy, classify