本論文針對第三代行動通訊和無線區域網路整合的問題,提出了兩個議題.首先, 實作IP封包標頭壓縮協定(IPHC protocol)來降低每個封包標頭的量.其次, 提出了"先認證機制"來降低在兩個系統下,使用者作換手時,過大的換手延遲. 雖然3GPP已經制定關於第三代行動通訊跟無線區域網路整合的方法跟流程. 然而, 此方法會有過大的換手延遲的問題. 此問題將會不利於兩網路系統的整合. 如此, 基於3GPP所提出的架構, 我們提出了先認證的方法來解決這個問題.

This thesis comprises two topics for the integrated 3GPP and WLAN networks. First,
IP Header Compression protocol (IPHC) is implemented to reduce packet loss rate over lossy
links. Second, the proposed pre-authentication could reduce the handoff delay in integrated
3GPP/WLAN networks. 3GPP has already proposed an architecture for the interworking of
3GPP and WLAN systems. However, the 3GPP solution leads to one issue: each time when
handoff happens, there is a long delay incurred by authentication before one can access
to WLAN or 3GPP system. This is unfavorable for the integration of 3GPP and WLAN
systems. Based on 3GPP architecture, this thesis presents a pre-authentication technique in
which the authentication procedure could be executed before handoff.

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[3] S. P. B. Nordgren, “IP Header Compression.” IETF RFC 2507, Feb. 1999.
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[15] 3GPP TR 22.934, “Feasibility study on 3GPP system to Wireless Local Area Network
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[16] 3GPP TR 23.934, “3GPP system to wireless local area network (WLAN) interworking;
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[17] 3GPP TS 23.228, “IP Multimedia Subsystem; Stage 2,” June 2002.
[18] ETSI TR 101 683, “Broadband Radio Access Networks (BRAN); HIPERLAN Type2;
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[19] ETSI TR 101 957, “Requirements and architecturearchitectures for interworking between HIPERLAN/
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service (RADIUS).” IETF RFC 2865, June 2000.
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