By Jiannong Cao
This short offers an outline of the necessities, demanding situations, layout matters and significant concepts for seamless and safe communications over heterogeneous instant networks. It summarizes and gives specified insights into the most recent study on handoff administration, mobility administration, quick authentication and safety administration to help seamless and safe roaming for cellular consumers. The reader also will know about the demanding situations in constructing suitable applied sciences and supplying ubiquitous web entry over heterogeneous instant networks. The authors have wide adventure in enforcing such applied sciences over heterogeneous instant networks, hence permitting them to bridge the space among the theoretical result of study and the genuine perform. Combining uncomplicated theoretical strategies and useful implementation, this short is perfect for execs and researchers within the box. Advanced-level scholars attracted to desktop verbal exchange networks and instant applied sciences also will locate the content material helpful.
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Additional info for Seamless and Secure Communications over Heterogeneous Wireless Networks
The benefits of such a protocol design include flexibility on service requirements and scalability on system infrastructure. 323 (Packet-based multimedia communications systems) proposed by ITU-T. In this section, we briefly introduce the SIP protocol . 323, we refer the reader to the ITU’s standard . In standard operations of SIP calling, both end users have to register with their own SIP registration servers and obtain Uniform Resource Identifiers (URIs) as their subscriber identifications from the servers.
The standard is proposed for vertical handovers between different network technologies and administrative domains, which can also be used in homogeneous handovers. The MIH standard comprises a handover-featured framework, a set of handoverenabling functions (MIH Functions – MIHF), and a MIH Service Access Point (MIH SAP and MIH LINK SAP). In MIHF, the functions can be classified into three categories, including the Media-Independent Event Service (MIES), the MediaIndependent Command Service (MICS), and the Media-Independent Information 24 2 Heterogeneous Wireless Networks Service (MIIS).
323 (Packet-based multimedia communications systems) proposed by ITU-T. In this section, we briefly introduce the SIP protocol . 323, we refer the reader to the ITU’s standard . In standard operations of SIP calling, both end users have to register with their own SIP registration servers and obtain Uniform Resource Identifiers (URIs) as their subscriber identifications from the servers. After that, end users can initialize SIP requests and proceed the subsequent operations. The call flow of SIP is shown in Fig.