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A conflict-insensitive NATed roaming framework using NAToD for proxy mobile IPv4 in WLANs

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Abstract

Providing efficient mobility management in the current Internet is increasingly important due to the quick growth of wireless mobile users. The emerging Proxy Mobile IPv4 (PMIPv4) technique brings a possible solution for that purpose. Since NAT function is widely adopted in IPv4 environment nowadays because of lacking IPv4 addresses, the PMIPv4 interoperating with NAT must be considered. Unfortunately, owing to the possible conflict of private IP address, we encounter a problem in broadcasted point-to-multipoint wireless networks such as IEEE 802.11 networks. To address this issue, we proposed a novel Network Address Translation on Demand (NAToD) scheme, which can well interoperate with the PMIPv4 solution. With our scheme, single public IPv4 addresses can be shared by multiple mobile nodes in both home and foreign networks, low-latency handoff can be achieved, deployment cost can be reduced, and software upgrade can be avoided for mobile nodes in wireless LANs. Our work allows mobile users in WLAN to access Internet based on the advantages of both PMIPv4 and NAT.

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Authors and Affiliations

  1. Department of Computer Science, National Chiao Tung University, 1001 University Road, 300, Hsinchu, Taiwan, ROC

    Wen-Kang Jia & Yaw-Chung Chen

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  1. Wen-Kang Jia
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  2. Yaw-Chung Chen
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Correspondence to Wen-Kang Jia.

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Jia, WK., Chen, YC. A conflict-insensitive NATed roaming framework using NAToD for proxy mobile IPv4 in WLANs. Telecommun Syst 53, 315–328 (2013). https://doi.org/10.1007/s11235-013-9700-7

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