Design and implementation of a fast handoff scheme supporting vehicular mobility over IEEE 802.11 WLAN
| Autor: | Made Harta Dwijaksara, Wha Sook Jeon, Minsik Hwang, Dong Geun Jeong |
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| Rok vydání: | 2017 |
| Předmět: |
Network architecture
Dynamic Host Configuration Protocol Service set business.industry Computer science ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 020206 networking & telecommunications 020302 automobile design & engineering Throughput 02 engineering and technology Subnet law.invention IEEE 802.11 0203 mechanical engineering Handover law 0202 electrical engineering electronic engineering information engineering Wi-Fi business Computer network |
| Zdroj: | SAC |
| Popis: | The wide spread deployment of IEEE 802.11 based wireless local area network (WLAN) and its ability to provide low cost as well as high speed Internet access attract the information technology (IT) practitioners to utilize the WLAN to also serve mobile stations with vehicular speed. However, there are some issues in its realization due to significant amount of time required to finish handoff process and small coverage area of WLAN access point (AP). To cope with these issues, we propose a network assisted fast handoff scheme. The information of AP is stored in the server, thus by requesting this information a user knows the working channel of AP. In addition, we suggest a cluster based network architecture, in which the APs in a single cluster are assigned the same BSSID. These two techniques allow only channel switching during the handoff process. We also propose a semi-static IP address allocation for efficient handoff between APs with different subnet addresses. This reduces the delay caused by the DHCP process during the L3-handoff. We have implemented the proposed handoff scheme using existing devices and evaluated its performance through experiments. It is shown that the proposed handoff scheme outperforms the legacy handoff in terms of handoff delay as well as throughput. |
| Databáze: | OpenAIRE |
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