This Article 
 Bibliographic References 
 Add to: 
Hand-Off Evolution with Multiple Interfaces
September/October 2008 (vol. 10 no. 5)
pp. 22-28
Ching-Lun Lin, Institute for Information Industry (III)
Chih-Hsiang Ho, WiMAX Technology Center at III
Jen-Yi Pan, National Chung Cheng University
Under the upcoming 4G network, mobile devices will have to handle multiple interfaces. Each network mechanism has its merits, such as WiFi's high speed and the long transmission range of High Speed Download Packet Access (HSDPA), but managing a combination of different interfaces during a hand-off procedure presents new challenges for next-generation networks because the network environment will continue to become more complex. A hand-off mechanism called hand-around allows users to manage multiple interfaces, but can cause bandwidth exhaustion and signal integrity problems. Interface scheduling could offer routing optimization, connection QoS, power savings, and bandwidth utilization. New issues, such as simultaneous location, will also arise under the upcoming 4G network, making multiple-interface integration an urgent topic.

1. C. Perkins, IP Mobility Support for IPv4, IETF RFC 3344, Aug. 2002;
2. N. Shenoy and R. Montalvo, "A Framework for Seamless Roaming across Cellular and Wireless Local Area Networks," IEEE Wireless Comm., vol. 12, no. 3, 2005, pp. 50–57.
3. J.-L. Lin and J.-Y. Pan, "Hand-Around: A Hand-Off Evolution with Monami6," Proc. 3rd IEEE Int'l Conf. Wireless Comm., Networking, and Mobile Computing (WiCOM '07), IEEE CS Press, 2007, pp. 1775–1778.
4. IEEE 802.21/D9.0, Draft IEEE Standard for Local and Metropolitan Area Networks: Media Independent Handover Services, IEEE, 2008.
5. B. Hamdaoui and P. Ramanathan, "A Network-Layer Soft Hand-Off Approach for Mobile Wireless IP-Based Systems," IEEE J. Selected Areas in Comm., vol. 22, no. 4, 2004, pp. 630–642.
6. R. Wakikawa, T. Ernst, and K. Nagami, "Multiple Care-of Addresses Registration," IETF Internet draft, May 2008; work in progress.
7. D. Johnson, C. Perkins, and J. Arkko, Mobility Support in IPv6, IETF RFC 3775, June 2004;
8. C. Larsson et al., "A Filter Rule Mechanism for Multiaccess Mobile IPv6," IETF Internet draft, Mar. 2007; work in progress.
9. K. Aso and B. Koh, "Multiple Forwarding Destinations Notification," IETF Internet draft, Jan. 2006; work in progress.

Index Terms:
Multiple interfaces, hand-off, 802.21, MIP, MCoA
Ching-Lun Lin, Chih-Hsiang Ho, Jen-Yi Pan, "Hand-Off Evolution with Multiple Interfaces," IT Professional, vol. 10, no. 5, pp. 22-28, Sept.-Oct. 2008, doi:10.1109/MITP.2008.102
Usage of this product signifies your acceptance of the Terms of Use.