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It needs to consider the establishment and release of IP telephony signaling-SIP or H.323 while analyzing VoIP network performance with OPNET, involving complex protocol configuration such as MGCP. What's more, the simulation efficiency will be greatly reduced in large-scale network. This paper presented an new idea to study the performance of VoIP network, it used the built-in hybrid simulation mechanism...
As a key problem in wavelength switched optical networks (WSON) in which wavelengths are the most important resources, routing and wavelength assignment (RWA) problem has been researched extensively. Due to the advantages of path computation in multi-layer and multi-domain networks, especially in multi-constraints scenarios, path computation element (PCE) has been introduced into WSON, which provides...
Efficient communications are crucial for disaster response and recovery. However, most current public safety land mobile radio (LMR) networks only provide narrowband voice service with limited support of low-speed data services. In this paper, we study to enhance the interoperability of LMR with commercial wireless cellular networks, by which a wide variety of benefits can be offered to disaster responders,...
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