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Present 3G Mobile Devices are often supports multiple communication technologies. If software developers want to control the configuration or monitor the characteristics of active Radio Access Technologies (RATs), their mobile applications will have to use different programming interfaces for each technology on various supported platform. We propose Modular Data Link Layer M-DALL for a NEXT GEN Mobile...
In order to effectively monitor the application of the network performance and service quality, rapidly response users' needs and complaints, telecom operators find that the demands for service quality are in an urgent case. According to the requirement analysis on quality monitoring for streaming media service, together with the characteristics of stream media transport protocol, this paper introduced...
The move towards an increasingly heterogeneous infrastructure has been one of the directions followed by most mobile operators in recent years. Here, one of the problems still waiting for a solution is how to enable multi-mode mobile terminals to freely roam between the different wireless systems used by the network operator for providing access to its users. The IEEE 802.21 is just one of the standardization...
Header compression is the process of reducing protocol header overhead in order to improve link efficiency while maintaining the end-to-end transparency. Robust header compression (ROHC) is a scheme for IMS (IP multimedia subsystem) and MBMS (multimedia broadcast multicast service). ROHC is defined for 2.5 Gm (GPRS) and according to 3Gpp2 next generation network, in CDMA2000 1x EV-DO and 1x EV-DV...
With the popularity of wireless communication, the security of mobile networks becomes more and more important. However, due to the computation limitation, many existing authentication key agreement protocols are not suitable for wireless mobile networks. In 2005, Sui et al. proposed an efficient authentication key agreement protocol, but their protocol can not resist the off-line password guessing...
This paper presents a study of the dynamic complexity of the Transmission Control Protocol (TCP) over mobile connections in the Universal Mobile Telecommunications System (UMTS) network. Using the concept of time-dependent exponent curves, the dynamic characteristics of TCP are studied and analysed from a simulation model of the UMTS network. Time-dependent exponent graphs have been used to test for...
This contribution addresses the case when live packet-switched video is used to enrich circuit-switched speech calls in mobile telephony. Circuit-switched and packet-switched transmissions generally operate on completely different transmission paths resulting in different QoS in terms of delay and loss rates. In this case, video and audio data recorded at the same time are not multiplexed together...
EAP-AKA is the extensible authentication protocol (EAP) mechanism for authentication and key distribution using the authentication and key agreement (AKA) mechanism used in the 3rd generation mobile networks. The improved authentication tests model is a formal verification method for security protocol analysis, which enhances the original authentication tests model in proving symmetric key protocol...
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