Seamless Handoff Between Heterogeneous Wireless Networks Haipeng Jin and Kameswari Chebrolu, UCSD Aditya Pande and Xiaohua Chen, Stanford University Javad Razavilar, Magis Networks Inc., San Diego Barani Subbiah, 3Com Corp., Santa Clara
Future Wireless systems will be characterized by their heterogeneity.
Multiple access technologies provide access to internet content.
Indoor Environment – 802.11, Bluetooth, HomeRF, IrDA etc.
Outdoor Environment – GPRS, CDMA2000, Satellite etc.
Systems differ in terms of coverage, bandwidth, delay, cost etc.
Universal Wireless Communication System
Anytime, Anywhere Coverage
Three Layers of Coverage – coverage decreases from top to bottom.
Topmost Layer – Satellite Systems
Middle Layer – Cellular Networks
Bottom Layer – Local Area Networks
Hot Spot Coverage
A common IP based network will connect them to each other.