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This paper is focused on Voice over LTE via Generic Access Network, which concept is to connect the already existing Mobile Switching Centers to the LTE network via a gateway supporting 2G or 3G voice environment.
It's necessary to enhance the capacity of wireless access network to provide mobile IPTV service. In this paper MMR(Mobile Multi-hop Relay) system is introduced to increase the performance of mobile system based on IEEE 802.16m which introduced network coding technology to increase the performance of radio link. Radio link quality and mobile terminal throughput are analysed by simulation when RS(Relay...
This paper addresses the important issue of how to optimize the performance of the current mobile backhaul radio access network (RAN) infrastructure to cope with the growing and dynamic nature of the emerging data-centric mobile multimedia traffic and services. Specifically, this work proposes and devises a simple and cost-effective EPON-based dynamic multiservice RAN architecture that efficiently...
Internet access for highly mobile users in high-speed trains or cars, underground walkways and tunnels is often challenged by intermittent connectivity with short and unpredictable connectivity opportunities. In such opportunistic communication scenarios, utilizing these connectivity opportunities to the best potential for the mobile user can be crucial to achieve an acceptable overall perceived service...
Ubiquitous Wireless Network will be the important infrastructure for ubiquitous information service in the future. Ubiquitous Wireless Network is objectively heterogeneous network, so vertical handoff is one of crucial topics. A vertical soft handoff scheme is proposed based on SIP using Wireless Access Gateway (RGW). RGW triggers and controls the handoff session to ensure same two-way delay of handoff...
With the development of wireless communication and mobile spatial information services, there is an increasing demand for current applications to have the capability of processing spatio-temporal data. Typical applications include intelligent transport systems, digital battlefield, location e-commerce, and so forth. Moving Objects Database, which manages dataset of moving objects, serves as an essential...
In this paper we describe the architecture and implementation details for a software system supporting session mobility at application level, based on standard SIP protocol. The target of our work is to build a more complex reconfigurable system with support for vertical handover in hybrid wireless networks. The presented system is a step toward this goal, providing a media session mobility solution...
Wireless 4G networks are the result of the interconnection of different wireless access networks and a core network. The heterogeneity of 4G networks require the implementation of a vertical authentication scheme that reduces the handover delay while preserving the security context of the ongoing communication. This paper proposes a complete vertical authentication scheme integrating the GSM, UMTS,...
Although IEEE 802.16 has emerged as one of the major candidates for next generation networks, it is also clear that in the near future the combination of several technologies will be required. In this sense, the support of mobility in heterogeneous environments, addressing broadband wireless, is one of the main requirements in next generation networks. This paper evaluates an architecture based on...
Long term evolution (LTE) is the next major step towards 4th generation of mobile communications. LTE introduces a new radio access network with technologies that offer higher data rates, efficiency and quality of services as well as lower costs and the integration with the existing open standards.
This paper presents a blueprint for proactive context-aware mobility support architecture for heterogeneous access networks called PRONET. In particular, we leverage upon the principles of cognitive networking to support proactive context-awareness for user-centric application adaptation via quality-of-experience (QoE) provisioning. Our proposed architecture is built upon port-based multi-homed mobile...
Collecting and analyzing massive mobility data from mobile network is becoming an emerging research topic in past years. It is proved to have great potential in lots of domains, e.g. intelligence traffic system, urban analysis, public safety etc. However, due to variety of data collection mechanisms, the data characteristics are various and need to be abstracted. In this paper, we outline the mobility...
Starting with an efficient mobility management scheme for heterogeneous wireless networks, this paper proposes a solution for AAA handling using a common database for storing user information. Regardless of the access technology selected, user@realm identities are used for authentication, authorization, and accounting. In particular, a new function is introduced in which port-based network access...
In order to access the Internet ubiquitously, most of the devices are equipped with multiple radio interfaces. In this way, the multi-homed node can attach to multiple access networks through multiple communication paths simultaneously. Flow based path selection is typically needed for the user to be always best connected. Meanwhile, autonomic feature can be introduced into the path selection system...
With the development of wireless communication technologies and mobile Internet, the demand for the ubiquitous service is increasing dramatically. However, there are many critical issues which prevent the performance in accessing the ubiquitous heterogeneous wireless networks. So the subject has become the focus of many research institutions. We establish a practical testbed which includes the different...
In recent years, the mobile equipments with powerful functions and convenient service feature are getting more and more popular. Those mobile equipments not only provide us many types of wireless network connections services but also with one of popular service which is video streaming. However, the most concerned problem is handover between networks during the video streaming transmission. So we...
An open onboard Internet system model based on the centralized access mode is designed for the m-commerce on train which is easy to merge the oncoming broadband wireless access and network technologies.The functionalities and entities in each layer are investigated and the hot issues are discussed according to this model. It is shown that the onboard Internet applications including the m-commerce...
The use of wireless communication technologies to increase road safety is rising within the automobile world. Vehicle to vehicle (V2V) communications is a very promising field but the slow vehicle renewal rate combined with the current world economic crisis turns V2V into a distant scenario. A more viable solution relies on Infrastructure to vehicle communications (I2V) and the use of the wireless...
In this paper, we present a method to optimally manage the access slots for the initial ranging contention process in IEEE802.16e air interface. In conventional method, the number of the initial access slot is fixed to a large number in common circumstance. The reason using the static large slot is to reduce the initial access collisions by slot contentions of the mobile terminals. Therefore the usage...
The mobility with quality of service in wireless networks is a reality ever closer. The need for mobility while communicating becomes more and more necessary. Technologies for wireless networks with interoperability develops the concept of "communications anytime anywhere". Interoperability uses the handover to ensure the mobility of a mobile terminal through various communication infrastructures,...
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