Abstract: We firstly gave a detailed analysis on the QoS routing protocols of ad hoc network. Then, the architecture of heterogeneous wireless networks and ad hoc multi-hop routing were illustrated in the environment of heterogeneous networks, including the position-based routing, the hierarchy routing, the multi-hop relaying routing to raise the network capacity, the routing for load balancing, and the cross-layer routing protocols. Finally, we summarized our previous research works about our proposed load balancing strategics based on the ad hoc multi hop routing in heterogeneous wireless networks,and analyzed the simulation results.

Key words: Heterogeneous networks, Ad Hoc network, Quality of service routing, Load balancing