The arrangement graph was proposed as a generalization of the star graph topology. In this paper we investigate the topological properties of the (n, k)-arrangement graph &k. It has been shown that the (n, n-2)arrangement graph An,+2 is isomorphic to the n-alternating group graph AGn In addition, the exact value of average distance of A,,& has been derived.
—This paper proposes a network-initiated terminal mobility mechanism (NITM) to facilitate handover with the session initiation protocol (SIP) in 3GPP Voice over WLAN (3GPP VoWLAN). We design the E2E tunnel state model running on the packet data gateway (PDG) using the CAMEL concept, and introduce the mobility server (MS) as a SIP application server to… (More)
The key exchange protocol is the most important cryptography mechanism to protect end-to-end communications by the secret session key encryption. This paper focuses on the four-party key exchange protocol in a environment in which two clients (or UEs) are registered under two distinct servers. We propose a Three-Way Key Exchange and Agreement Protocol,… (More)