In many SIP deployments, SIP entities exist in the SIP signaling path between the originating and final terminating endpoints, which go beyond the definition of a SIP proxy, performing functions not defined in Standards Track RFCs. The only term for such devices provided in RFC 3261 is for a Back-to-Back User Agent (B2BUA), which is defined as the logical concatenation of a SIP User Agent Serve...

Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document specifies the SIP P-Profile-Key P-header. This header field is used in the 3rd-Generation Partnership Project (3GPP) IMS (IP Multimedia Subsystem) to provide SIP registrars and SIP proxy servers with t...

Abstract. Sense of indebtedness toward parents (SIP) refers to feelings debt give back for their migration-related sacrifices in second-generation immigrants. Based on Kang (2010), we developed a German SIP scale measure these feelings. The purpose this study was threefold: (1) provide evidence the theoretical factor structure underlying SIP, (2) test SIP’s measurement invariance four immigrant...

objective(s):cyclophosphamide (cp) toxicity on testis was hampered by squid ink polysaccharide (sip) via restoration of antioxidant ability in our previous investigations. this study investigated roles of nrf2/are signal pathway in testis of treated mice. materials and methods: male kunming mice were employed to undergo treatment with sip and/or cp. protein levels of nrf2, keap-1, histone deace...

The SIP retransmission mechanism can cause SIP network collapse with short term overload. In this paper, we investigate with a fluid modeling approach the chaotic behaviour of the SIP retransmission mechanism in SIP networks. We capture the complex correlation structure in SIP systems through a detailed and novel queuing analysis. To dimension a buffer size which can avoid unnecessary message d...

The SIP retransmission mechanism can cause SIP network collapse with short term overload. In this paper, we investigate with a fluid modeling approach the chaotic behaviour of the SIP retransmission mechanism in SIP networks. We capture the complex correlation structure in SIP systems through a detailed and novel queuing analysis. To dimension a buffer size which can avoid unnecessary message d...

As a result of its low costs and high degree of integration with other services, Voice over Internet Protocol (VoIP) has become very widely used, while Session Initiation Protocol (SIP) is one of the most important protocols for providing the VoIP service. Since SIP is an open source code with a simple structure and high expansibility, SIP servers are more vulnerable to attack by SIP messages m...

In this paper, we present a multiscale “squiral" (square spiral) image processing (SIP) framework. An efficient spiral addressing scheme is deployed for standard pixel based square images to facilitate fast image processing. A SIP-based convolution technique is developed by simulating the “eye tremor" phenomenon of the human visual system. The multiscale SIP operators are constructed by convert...

SIP (Session Initiation Protocol) has been chosen as the core signaling protocol of the NGN (Next Generation Network), but the large SIP message which is text-based is an obstacle with the planned usage of SIP in wireless mobile networks. Based on the SigComp (Signaling Compression) framework, some further improvements are made to the Deflate algorithm according to the characteristics of SIP in...