Abstract
Along with the rapid deployment of WLAN, the density of the wireless AP will increase dramatically. In this circumstance, the continuity of service requires the wireless system to provide enough credence for those frequent handoffs among different base stations. Taking audio services over WLAN for example, the capacity should be guaranteed that the mobile client devices can establish a new association with another new AP as soon as possible after they terminate the connection with the former one. The latency derived from a handoff process is composed of three parts, including time for probing and detection, authentication and service re-association. If the latency exceeds 50 ms, the interruption will be sensed obviously by ears. Nevertheless, the latency in the present IEEE 802.11 network is usually several hundred milliseconds on average, which may lead to negative influences, such as the occasional transmission interruption, connection loss and deteriorated audio quality, and so forth. Therefore, the fast handoff protocol plays an essential part in the extensive deployment of audio services over IEEE 802.11 networks. In this chapter, according to a close scrutiny to IEEE 802.11r, which specifies fast handoff among APs in a WLAN ESS, the used security protocols are presented. To make up the deficiency in DoS-resilience of the scheme in the standard, we propose two new secure fast handoff schemes, which are MIC based and Hash chain based. At last, we present the secure and fast handoff solution based on location. This solution is characterized by the following functions, QoS guaranteeing, location probing, and location based fast switching.
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© 2009 Higher Education Press, Beijing and Springer-Verlag Berlin Heidelberg
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Ma, J., Wang, C., Ma, Z. (2009). Security Protocols for Fast BSS transition. In: Security Access in Wireless Local Area Networks. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00941-9_4
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DOI: https://doi.org/10.1007/978-3-642-00941-9_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-00940-2
Online ISBN: 978-3-642-00941-9