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Relays are mobile network base stations, which connect to the network via an in-band wireless backhaul link instead of using a dedicated wired or microwave backhaul link as regular base stations do. Connecting through a wireless backhaul raises difficulties when it comes to accessing the operator's Operation, Administration and Maintenance (OAM) System, since prior to the appearance of relay nodes,...
Spurred by the increasing demand for mobile broadband services and the growing number of devices supporting multiple radio access technologies (e.g., cellular, WiMAX, Wi-Fi, Bluetooth), much research is being done to improve the user experience while addressing issues related to network efficiency, congestion, interference, and cost to operators, service providers, manufacturers, and consumers alike...
Mobility in a wireless heterogeneous scenario in which the mobile devices are able to connect to more than one access technology available in their vicinity requires a re-consideration on the access network reselection mechanisms. The present paper describes and evaluates the opportunity of introducing novel access reselection procedures which enable a network provider to optimize the allocation of...
In this paper we propose a fast and energy efficient service provisioning approach. In our work, we focus towards the management of already discovered services. We assert that if the sensor nodes share the important service information among each other, then the service re-discovery can be reduced at greater extent. Hence a significant amount of Service Discover (SD) time and the network energy cost...
Increasing demand for mobile data communications and for various applications encourages mobile network operators (MNOs) to deploy new radio access technologies (RATs). The third generation partner project (3GPP) has specified an all-IP-based mobile core network: evolved packet core (EPC) which can can accommodate a 3.9-G RAT (Long Term Evolution [LTE]) as well as conventional RATs, such as UMTS and...
In the Internet, nodes are identified using IP addresses that depend on their topological location. IPv4/IPv6 translation technology involves address mapping between IPv6 and IPv4 nodes and the methods used to translate protocols, where nodes are in their respective IP version of network. The various IPv4 addressing mechanisms and addressing architectures are studied. The detailed study reveals that...
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.
This paper provides a technological overview of the system architecture evolution (SAE) of LTE networks. The target of this overview is to provide a basic knowledge on 4G cellular network structure, entities responsibilities and protocol-stack. The overview is mainly based on the relevant 3GPP standards and on Chapter 3 of the book "LTE for UMTS: OFDMA and SC-FDMA based radio access" edited...
A technical prerequisite for a converged network is a common service delivery platform that is independent from the access networks below. The 3GPP SIP-based IP multimedia subsystem (IMS) is defined for this purpose. By specification, IMS is the first implementation towards reaching converged communications which allows users to communicate with video, audio and multimedia content, via any fixed,...
The Home NodeB has been the hotspot in the mobile communication field. Comparing with Macro NodeB, Home NodeB has several features which bring the challenges for management. The paper proposes two alternative management architectures for the Home NodeB access network based on the different management requirements, and discusses the management elements in detail. These two kinds of architectures can...
In this paper we propose a hybrid radio access network architecture that aims to connect remote areas to broadband networks. The proposed architecture consists in a WiMAX network for final users which hence can be connected to the internet backbone. In the other hand the WiMAX base stations are connected via the satellite to the wired network to circumvent mobility and long distance issues. To allow...
Wireless mesh network is a new broad bandwidth distributing wireless access network system. It can access Internet through gateway nodes. When network load of access is heavy or network size is expanding, one gateway node will become a bottleneck of the access network because of the serious congestion of a large number of data packets transmitted to the gateway node. Based on the research of DSR (dynamic...
Recently, wireless mesh networks (WMNs) have attracted attention as a way to provide alternative Internet connectivity to rural areas or communities. In WMNs, wireless access points communicate with each other wirelessly, forming a true wireless mesh based access network of mesh relay nodes (MRNs). A major problem is, however, scalability of WMNs as well as MAC and PHY layer overhead for packet transmission...
We propose in this paper, to replace the two layer 3 Handover mechanisms defined for the situation of macro mobility with IP address change in IEEE 802.16e: ldquoClient-MIP and Proxy-MIPrdquo, by the new protocol created specially for the mobility without services interruptions: ldquoMSCTPrdquo, which has the peculiarity to support several IP sessions at the same time.The purpose of this proposal...
More and more of wireless sensor networks (WSN) are proposed in the past years. However, due to the differences of protocols between WSN and Internet, data exchange with these heterogeneous networks is a serious issue. In this paper, we propose an architecture, named IAPA (integrated wireless access point architecture) for WSN, that amended WLAN AP to convergence the heterogeneous networks. It is...
Among the research community, on-going efforts are being continued to efficiently interconnect MANETs to fixed infrastructure in order to expand the reach of the Internet to Wireless access networks. Such scenario gives raise to a number of challenges that require solutions involving Internet gateway selection scheme, extensions to ad hoc routing technique. In this paper, we depict a network architecture...
Infrastructure meshed networks provide access to wireless clients that do not participate in traffic forwarding. This paper proposes minimalist instant handoff for wireless access networks (MIHAN), allowing for seamless movement of nodes in coverage areas, while maintaining connectivity. The approach of MIHAN is that all client frames, send in radio range of an access node, are received and forwarded...
The capabilities of the wireless networks are continuously being enhanced to meet ever growing demand of the higher data rates for accessing wide range of Internet services in the mobile node. The IEEE 802.16e mobile worldwide interoperability for Microwave Access (WiMAX), 3GPP long term evolution (LTE) and 3GPP2 ultra mobile broadband (UMB) wireless technologies are identified as next generation...
The next generation broadband wireless access networks are expected to support a variety of multimedia rich applications which can lead to very high traffic demand. With the development of high speed radio access technologies the backhaul network can become the bottleneck if not upgraded and configured optimally to support the expected increase in date rates and traffic demands. To deliver high data...
Wireless mesh networks (WMNs) are an emerging architecture for multi-hop transmission where the nodes have relative fixed positions and communicate to the Internet through one or more gateways. Our goal is to maximize the network utilization by balancing the traffic load, while providing fair service and QoS guarantees to the users. In this paper, we provide an efficient method that elegantly balances...
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