Date Added: Jun 2011
This paper proposes a heterogeneous wireless communication network with soft handover in the application layer. The proposed network requires no upgrades of wireless infrastructure and mobile terminals to evolve the present homogeneous networks to the proposed heterogeneous network. Only installing application programs on the content server side and the mobile terminal side is required. The performance of the proposed network has been evaluated in a field trial using a Mobile Broadband Wireless Access (MBWA) air interface with wide coverage and a Wireless Local Area Network (WLAN) air interface with high throughput.