As a local mobility management protocol, Proxy Mobile IPv6 (PMIPv6) is designed to enable mobile nodes to move in a domain without any involvement in the mobility signalling operation. However, a single domain cannot satisfy mobile nodes' movement requirement. Hence, we propose a solution to enable mobile nodes to move across multiple PMIPv6 domains. We introduce a new network entity called traffic distributor (TD) to manage the inter-domain handover. Through redirecting the traffic to the domain which currently visited by the mobile node, TD can ensure mobile node continue its session even when it moves across domains. We conduct a series of experiments to compare our proposal with Neumann proposal which is another proposal to handle inter-PMIPv6-domain issues. Experimental results show that our proposal is a viable alternative for inter-domain handover, it can outperform Neumann proposal in terms of binding cache entry numbers,transmission delay and handover delay.