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This paper proposes an extension of Proxy Mobile IPv6 (PMIPv6) with bicasting for multi-homing and mobility support. In the proposed scheme, the Local Mobility Anchor (LMA) extends its Binding Cache Entry (BCE) for support of multiple bindings, and a mobile node (MN) performs the binding update to LMA. To support the handover, the LMA begins the bicasting of data packets to the New-Mobile Access Gateway (N-MAG) as well as Previous-Mobile Access Gateway (P-MAG). The proposed scheme is compared with the existing PMIPv6 handover by ns-2 simulations. From the numerical analysis, we can see that the proposed scheme can reduce the possible packet losses and handover latency, compared to the existing scheme, during handover in the multi-homing environment.