A Concept for Radio Standard Spanning Communication in Mobile Ad Hoc Networks (original) (raw)
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A transport layer interoperability model for mobile ad-hoc environment
2011 International Conference on Communications and Information Technology (ICCIT), 2011
Mobile ad-hoc networks (MANETs) are dynamic in nature. Links between nodes may constantly change due to mobility. The performance of the transmission control protocol (TCP) degrades in such an environment mainly due to its inability to differentiate between congestion and link failures which are frequent in MANETs. Several TCP variants were proposed to adapt TCP to a mobile environment. In addition, other reliable transport protocols were especially designed for MANETs as an alternative to these TCP variants. Several network settings might require different transport protocols to coexist and interoperate. In this paper we present a model that can be used to achieve interoperability between reliable transport protocols. The proposed model consists of forming an intermediate easy-to-implement thin layer between the network layer and the transport layer in the TCP/IP stack. Such layer will be invoked at the receiver side and will preserve the semantics of the sender's transport protocol. Our proposed model focuses on TCP and ATP, the ad-hoc transport protocols, but it can be expanded to accommodate other protocols.
Design of a Flexible Cross-Layer Interface for Ad Hoc Networks
Cross layering has recently emerged as a new trend to cope with performance issues of mobile ad hoc networks. The concept behind this technique is to exploit local information produced by other protocols, so as to enable optimizations and deliver better network performance. However, the need for a new interaction paradigm inside the protocol stack has to face with the legacy aspects of classical architectures (e.g., the Internet), where layer separation allows for easy standardization and deployment. In this paper, we show that cross layering can be achieved maintaining a clean architectural modularity, making protocols exchange information through a vertical interface. Specifically, we present the design of a cross-layer module, and provide a proof of concepts of its "usability" at different layers of the protocol stack, considering two case studies from a design and implementation standpoint. ¡
Enhanced Integrated IP/MAC/PHY Services for Ad hoc Networks
2008
This demo presents a new wireless ad hoc network architecture that supports multi-hop communications efficiently. This architecture contains a cluster based MAC layer and a reliable PHY layer closely integrated. Link state routing tied to the MAC layer through a cross-layer interface to improve overall performances. We have implemented the architecture in software and ported it on an RT (Real Time) Linux platform equipped with a PCMCIA board containing an FPGA and two RF chains. We will demonstrate the equipment for audio and surveillance data applications through multi-hop communication.
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Recent advances in portable computing and wireless technologies are opening up exciting possibilities for the future of wireless mobile networking. A Mobile Ad hoc NETwork (MANET) consists of mobile platforms which are free to move arbitrarily. This is in contrast with the topology of the existing Internet, where the router topology is essentially static (barring network configuration or router failures). In a MANET, the nodes are mobile and inter-node connectivity may change frequently during normal operation. In this course we will focus our attention on current protocols which provide connectivity in mobile ad hoc networks, such as routing and MAC protocols. Moreover, we will also cover an emerging promising area within ad hoc networks called Sensor Networks and demonstrate its wide applicability. We will conclude this course by discussing current challenges to mobile networking that have not received as much attention from the research community, and then highlighting some of the current wireless protocol standardization efforts within the IETF and the Bluetooth SIG (Special Interest Group).
A Study of Transport Protocols For Wireless Ad Hoc Networks
Ad hoc network is infrastructure less. Each individual node in an ad hoc network must be capable of acting as a host and as a router. The benefits of ad hoc architecture leads to self-reconfiguration and adaptability to highly variable mobile characteristics such as power and transmission conditions, traffic distributions, and load balancing. These benefits come at a cost. Randomness of network topology due to node mobility in ad hoc networks create new challenges, which, together with the local broadcast capability, causes a set of apprehensions relating to medium access control protocol issues, routing and forwarding issues, transport protocol issues and security issues.
An Overview of Mobile Ad Hoc Networks for the Existing Protocols and Applications
International Journal on Applications of Graph Theory in Wireless Ad Hoc Networks and Sensor Networks, 2010
Mobile Ad Hoc Network (MANET) is a collection of two or more devices or nodes or terminals with wireless communications and networking capability that communicate with each other without the aid of any centralized administrator also the wireless nodes that can dynamically form a network to exchange information without using any existing fixed network infrastructure. 88 past few years the rapid popularization of mobile phones can be seen to communicate with others anytime, anywhere, get the latest information, or exchange the required information is no longer a dream, And we have gradually become an integral part of life. Military purposes, as is often considerable danger in field environment, some of the major basic communication facilities, such as base stations, may not be available, in this case, different units, or if you want to communicate between the forces, we must rely on This cannot MANET network infrastructure limitations. In emergency relief, the mountain search and rescue operations at sea, or even have any infrastructure can not be expected to comply with the topographical constraints and the pressure of time under the pressure, Ad Hoc Network completely wireless and can be any mobile feature is especially suited to disaster relief operations. When personal communication devices and more powerful, some assembly occasions, if you need to exchange large amounts of data, whether the transmission of computer files or applications that display. if we can link into a temporary network structure, then the data transmission will be more efficient without the need for large-scale projection equipment would not have point to point link equipment (such as network line or transmission line). The current wireless LAN technology, Bluetooth is has attracted considerable attention as a development plan. Bluetooth's goal is to enable wireless devices to contact with each other, if the adding the design of Ad Hoc Network (MANET).
Towards a new communication paradigm for mobile ad hoc networks
2005
In mobile ad hoc networks, we envision a network where mobile users obtain services from close-by instances. The architecture of today's Internet was designed for fixed users that obtain services from stationary servers and is not well suited for such scenarios. The reason is that (i) the architecture combines identity and location in an IP address and thus forces mobile elements to change their identity when moving over subnet boundaries; and that (ii) the layered architecture implies a separation of service discovery/selection and routing, which is inflexible and also leads to protocol overhead. In this paper, we revise the existing Internet architecture and propose a novel architecture that is better suited for mobile ad hoc networks. There, clients bind to location-independent service identifiers and send packets that are routed to any instance of the desired service in proximity. The routing mechanism is based on the concept of (electrical) fields with which packets are forwarded towards a region with a high density of service nodes. As a result, this architecture increases the probability of successful packet delivery and leads to a robust routing substrate even in very unstable network conditions.
Special Issue on “Mobile Ad-Hoc Wireless Networks”
Journal of Advanced Research, 2011
Mobile Ad Hoc wireless Networks (MANETs) is defined as a multi-hop infrastructureless wireless network which is self-organized and connects two or more stations spontaneously in the absence of central point or any access point. It allows peer-to-peer connections between devices that are operating in ad-hoc mode and are within the wireless range. They can form standalone groups of wireless nodes and can be connected to a cellular or fixed network. Nodes in a mobile adhoc network are free to move and organize themselves in an arbitrary fashion. Each user is free to roam about while communicating with others. Ad-hoc networks are suited for use in situations where an infrastructure is unavailable or when the costs to deploy one are very high.
Collation of Mobile Ad-Hoc Network Protocols
Mobile ad-hoc network means moving and temporary networks i.e. without any prior infrastructure. So MANET is a network that provides easy way to exchange packet while moving from one state to another. They are deployed in 1990's and after that, they are researched for a long time. Basically, these are a collection of nodes that is connected through a wireless medium forming rapidly changing topologies. To provide efficient end to end communication they demand new strategies to be implemented. As the demand for wireless devices are growing rapidly because of the features that provide flexibility and reliability which includes computed speed ,portability of devices etc. MANETS represent complex distributed systems that comprise wireless mobile nodes that can freely self-organise arbitrary and temporary network technologies. These are useful where infrastructure is not possible, where; people and devices are allowed to work seamlessly e.g. Disaster Recovery Environments. Routing in MANET although face challenges due to frequent change in topologies but they can be dealt and provide advantages to us. This paper is an overview of routing protocol, Challenges and protocol comparisons of MANET.