Abstract: Based on the research background of multi-path choosing between gateways in hierarchy routing, this work exploited the guarantee method of traffic flow's specific QoS requirements and put forward some relevant policies and methods, including representation, transition and computation of traffic flows' QoS preference. On the basis of traffic flows' QoS preference, the strategy of optimal service selection was brought forward. Then, with the extension of GPSR algorithms,put forward a traffirprefer-based multi objective hierarchy routing TMQODR which is GPSR QoS Routing algorithms. The analysis on relevant performance for the algorithm has confirmed its feasibility and effectively.

Key words: Mobile ad hoc network, QoS routing, Multi object decision, Traffic flow preference