While most vertical handoff schemes are based on single optimization policy in which service difference is not taken into consideration, we propose a service-based handoff decision model.

• 虽然大多数对于垂直交递是基于单一政策来优化服务，并未考虑不同服务间的差异。因此，我们提出了一个以服务差异为主的交递决策模式。