Network Architecture Design and Integration:

• HIM: Heterogeneous Intersystem Mobility
• Heterogeneous Intersystem Mobility
• We have proposed an architecture to coordinate the mobility protocols between IPv4 and IPv6. Besides, the implementation is constructed to prove the functionality and performance.


• Main achievements and outcomes
• Research or technology outcomes
• As far as we know, the proposed HIM is the first mobility management that considers both Mobile IPv4 and IPv6 over heterogeneous network. The proposed method has been published in Proc. of IEEE Consumer Communications and Networking Conference (CCNC '06)

• The two-tier heterogeneous MANET architecture
• The low tier of the network consists of a set of mobile hosts each equipped with a IEEE 802.11 wireless LAN card.
• To connect to the Internet, the high tier is comprised of a subset of the mobile hosts, called gateways, which can access to cellular/infrastructure networks.

• RAMP: Reconfigurable Architecture and Mobility Platform
• Reconfigurable Architecture and Mobility Platform
• We have proposed an architecture to accommodate, control, and coordinate various types of mobility management protocols. Both analytical model and simulation have been developed to analyze the architecture


• Main achievements and outcomes
• Research or technology outcomes
• So far, no network can support more than one mobility management protocols. RAMP is the first mobility platform that can support more than one mobility management protocol in any network topologies. The proposed mechanism has been published in IEEE Transactions on Wireless Communications (vol. 6, no. 8, pp. 3102-3113, Aug. 2007.)

• Two-tier Authentication for Cluster and Individual Sets in Mobile Ad Hoc Networks
• We have proposed a two-tier authentication scheme for cluster and individual sets in MANETs, providing fast message verification, group identification and secure user identification. The first tier provides fast message verification and group identification. The second tier provides secure user identification. The proposed two-tier authentication scheme can prevent internal and external attacks, including black holes, impersonation, routing table overflows and energy consummation attacks.


• Main achievements and outcomes
• Research or technology outcomes
• We introduce the secret sharing technology into MANET authentication. This scheme can be applied to multicast applications in MANETs. These results have been published in Journal of Computer Networks.

• sRAMP: secured Reconfigurable Architecture and Mobility Platform
• secured Reconfigurable Architecture and Mobility Platform
• RAMP provides mobility management choices. We have implement the security mechanisms into RAMP to make the RAMP system more secure.


• Main achievements and outcomes
• Research or technology outcomes
• sRAMP is the first mobility platform that considers both mobility management and security issues. With sRAMP, each network can use ANY mobility schemes and ANY security schemes based on the userˇ¦s choice.

• Mobility Supports using Mobile SCTP in 4G Heterogeneous All-IP Core Networks
• We proposed a vertical handoff architecture to support mobility among heterogeneous access networks by employing mobile SCTP protocol. We utilized the multi-homing feature of SCTP to achieve the seamless handoff for next generation 4G systems.


• Main achievements and outcomes
• Research or technology outcomes
• Previous works selected an appropriate transmission path based on the signal strength, bandwidth or round trip time delay. Our work designs criteria to select the best transmission path by considering the bandwidth, round trip time delay and power consumption at the same time.

• Network Mobility (NEMO) with Fast Mobile IP Support for Integrated WiMAX-WLAN Wireless Networks
• We have designed and implemented mechanisms to support network mobility (NEMO) with fast mobile IP (FMIP) capability over next generation heterogeneous all-IP 4G systems.


• Main achievements and outcomes
• Research or technology outcomes
• Previous works considered the issues for NEMO and FMIP independently. The NEMO without FMIP layer-2 support usually suffers from significantly long delay, which is intolerable for real-time multimedia applications. Our work designs and implements mechanisms to integrate NEMO with FMIP and resolves the resultant tromboning routing.

• Wire1X
• A FREE supplicant of 802.1X. It provides various authentication types and several encryption algorithms. It complies IEEE 802.1X, 802.11i, WPA, WPA2, etc.


• Main achievements and outcomes
• Research or technology outcomes
• Wire1X has been cited frequently in many areas. (1) Recommendations of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce. (2) IETF and IEEE standards meetings. (3) Internet2: the foremost U.S. advanced networking consortium. (4)In many articles and websites. (5) Google: around 745 links for ˇ§WIRE1xˇ¨