This document discusses wireless communications and ad hoc networks. It begins with an introduction to wireless communications, including the generations of wireless technologies and electromagnetic spectrum used. It then covers wireless computer networks, focusing on wireless local area networks (WLANs) and transmission techniques like infrared and spread spectrum. The document explains the IEEE 802.11 standard architecture, including components like access points, basic service sets, and extended service sets. It discusses security issues and considerations for wireless networks. Finally, it defines ad hoc networks as decentralized peer-to-peer networks without a central access point, set up temporarily to meet immediate needs.
An ad-hoc wireless network is a collection of wireless nodes that can dynamically be set up anywhere and anytime without using an existing network infrastructure or centralized administration. There are different types including wireless mesh networks, wireless sensor networks, and hybrid wireless networks. Wireless mesh networks provide many paths for data transfer between sources and destinations with advantages like high data rates and scalability. Wireless sensor networks consist of sensor nodes that monitor regions without infrastructure by working together. Hybrid wireless networks incorporate properties of multi-hop relaying along with existing infrastructure for higher capacity and flexibility. Applications include monitoring, tracking, location services, and future scopes involve connecting more devices and enabling access to real-world information.
The document discusses ad hoc wireless networks and their applications. It describes key characteristics of ad hoc networks including being self-organizing and lacking centralized administration. It outlines several applications of ad hoc networks such as military operations, emergency response, wireless mesh networks, and wireless sensor networks. It also examines important technical issues for ad hoc networks related to medium access, routing, multicasting, transport protocols, energy management, and deployment considerations.
The document discusses ad-hoc networks and their key characteristics. It describes several challenges in ad-hoc networks including limited battery power, dynamic network topology, and scalability issues. It also summarizes several ad-hoc network routing protocols (e.g. DSDV, AODV, DSR), addressing both table-driven and on-demand approaches. Additionally, it outlines some ad-hoc MAC protocols like MACA and PAMAS that aim to manage shared wireless medium access.
This document discusses the origins and development of ad hoc networks. It describes how packet radio networks (PRNETs) in the 1970s, developed by DARPA, were the first generation of ad hoc networks. PRNETs used multi-hop routing between mobile radio terminals and packet radios to communicate without fixed infrastructure. The document outlines the key components and routing techniques of PRNETs, including point-to-point and broadcast routing. It also discusses how subsequent generations in the 1980s-1990s focused on improving performance, scalability, and developing commercial applications like Bluetooth.
Mobile ad-hoc networks (MANETs) allow devices to connect without a centralized infrastructure by forming a multi-hop wireless network. MANETs are useful in situations where infrastructure is unavailable, expensive to set up, or where rapid deployment is needed. Routing in MANETs is challenging due to the dynamic topology, asymmetric wireless links, and interference. Common routing protocols for MANETs include DSDV, DSR, AODV, and protocols that use clustering or geographic position information to improve routing performance.
This document provides an introduction to mobile ad hoc networks (MANETs) and discusses associated research issues. It defines MANETs as infrastructureless, self-configuring networks formed spontaneously by wireless devices. Key characteristics of MANETs include dynamic topology, limited bandwidth, and lack of centralized management. The document outlines several research areas in MANETs, including power management, MAC layer protocols, routing, transport protocols, security, and data management. It discusses challenges in each area posed by the mobile and decentralized nature of MANETs.
This document discusses mobile ad-hoc networks (MANETs) and wireless sensor networks (WSNs). It defines a MANET as a network formed spontaneously by wireless mobile nodes without any preexisting infrastructure. Key characteristics of MANETs include dynamic topologies, energy-constrained operation, limited bandwidth, and security threats. Applications include collaborative work, crisis management, and personal area networks. The document also describes different routing protocols for MANETs including table-driven, source-initiated, and hybrid protocols. It then discusses challenges in WSNs such as ad-hoc deployment, limited resources, scalability, and fault tolerance and how these influence routing protocol design.
This document provides an overview of a course on mobile and ad hoc networks. It lists two textbooks that will be used and states that the goal is to cover fundamental design issues and solutions for network architecture and protocols. It also lists some related websites and outlines the objectives of chapters that will introduce wireless communication technologies, network standards, and multiple access techniques for ad hoc networks.
This document provides an overview of wireless ad-hoc networks. It discusses the definition and types of multi-hop wireless networks. Some key technical challenges for ad-hoc networks are limited wireless range, mobility, and energy constraints. The document reviews several media access and routing protocols used in ad-hoc networks, including MACA, DSDV, AODV and DSR. It also discusses providing quality of service in ad-hoc networks and some of the challenges in routing, maintenance and variable resources. In conclusion, the document states that flexibility, low cost and applications make ad-hoc networks an essential part of future pervasive computing environments.
This document discusses routing protocols for ad hoc wireless networks. It begins by outlining some key issues in designing routing protocols for these networks, such as mobility, bandwidth constraints, and frequent topology changes. It then classifies routing protocols as being either table-driven, on-demand, or hybrid approaches. Table-driven protocols maintain consistent, up-to-date routing information through periodic table updates. On-demand protocols only discover routes when needed, to reduce overhead. The document proceeds to describe several examples of these different routing protocol types.
The document discusses mobile ad-hoc networks (MANETs). It provides an introduction to MANETs and their history. It describes different routing protocols for MANETs including reactive, proactive, and hybrid protocols. It discusses some problems with MANETs and applications of MANETs such as for business meetings. It proposes a solution for secure data transmission in MANETs and concludes with a comparison of MANET routing protocols.
Mobile Ad hoc Networks (MANETs) allow devices to connect spontaneously without infrastructure by acting as both hosts and routers, forwarding traffic in a multi-hop fashion. They face challenges from dynamic topology, limited bandwidth and security, and use reactive routing protocols like Dynamic Source Routing (DSR) that discover routes on demand through flooding route requests. MANETs have applications in military operations, disaster relief, vehicular networks, and personal area networks.
An ad hoc network is a type of wireless network that does not require a central router or base station. Nodes communicate directly with each other or through intermediate nodes in a multi-hop fashion without any fixed infrastructure. Routing and resource management are distributed. Common types include wireless mesh networks, wireless sensor networks, and hybrid wireless networks. Ad hoc networks face challenges related to medium access, routing, security, and resource constraints due to the lack of centralized control.
This document discusses mobile ad-hoc networks (MANETs) and wireless sensor networks. It describes how MANETs are self-configuring networks formed by mobile nodes connected wirelessly without any fixed infrastructure. Each node acts as a router to forward packets. Wireless sensor networks are similar but use smart sensor nodes that can sense environmental data and disseminate it through the network. Examples of MANET and sensor network applications include content sharing between devices, industrial plant monitoring, and traffic monitoring. Security challenges in these networks are also discussed.
The document summarizes a student project on improving energy efficiency in mobile ad hoc networks (MANETs) using random casting. The proposed approach aims to control overhearing, reduce packet loss, and improve quality of service. Simulation results show the DSR routing protocol performed better than AODV, AOMDV, and DSDV in terms of higher packet delivery ratio and lower packet loss. Future work includes analyzing the performance of the random cast architecture and applying it to more routing protocols and applications in MANET environments.
Mobile ad-hoc networks (MANETs) are self-configuring networks of mobile routers connected by wireless links. They form a random, changing topology as routers move freely and unpredictably. MANETs are suitable for emergency situations where infrastructure is not available. They use routing protocols that are either table-driven and proactively maintain routes, or on-demand driven where routes are created as needed. Examples of protocols discussed are DSDV, AODV, DSR, and TORA. MANETs face challenges from their changing topology, but enable communication in infrastructure-less scenarios.
This document discusses mobile ad-hoc networks (MANETs). It defines MANETs as collections of wireless mobile nodes that can dynamically form a network without any centralized administration. The document outlines the characteristics, mechanisms, transmission standards, routing protocols, applications, and future aspects of MANETs. It explains that MANETs are self-configuring, infrastructureless networks suitable for situations where fixed networks are not available or are too expensive to deploy.
The document discusses free computer science eBooks and technology news that are being provided. It includes links to blogs sharing this free content and encourages clicking on advertisements to support their work. It then discusses the topics of wireless technologies and Wi-Fi networks in particular, covering introductions, architectures, elements, how they work, topologies and configurations.
This document provides an overview of wireless networks and protocols. It discusses wireless personal area networks (WPANs) such as Bluetooth and infrared, wireless local area networks (WLANs) using IEEE 802.11 standards, and wireless metropolitan area networks (WMANs) such as WiMAX. For WLANs, it describes wireless access points, common network architectures, and media access control protocols including carrier sense multiple access with collision avoidance (CSMA/CA) and carrier sense multiple access with collision detection (CSMA/CD).
The document discusses Wi-Fi technology, including its standards, architecture, security techniques, and applications. It describes the IEEE 802.11 standards for Wi-Fi networks, including 802.11b, 802.11a, and 802.11g. It outlines the basic components of a Wi-Fi network including access points, Wi-Fi cards, and security measures. It also summarizes common Wi-Fi network configurations, topologies, and applications as well as security techniques such as SSID, WEP, WPA, and 802.1x access control.
The document discusses wireless local area networks (WLANs) and the IEEE 802.11 standard. It provides an overview of wired and wireless LANs, the development and specifications of IEEE 802.11, and differences between wireless and wired networks that 802.11 addresses like power management, security, and bandwidth. It also covers wireless LAN topologies, media access control, security issues, and physical layer standards defined in original 802.11 like frequency hopping spread spectrum and direct sequence spread spectrum.
6LoWPAN allows for low-cost wireless connectivity for applications with limited power and bandwidth needs. It provides IPv6 networking over IEEE 802.15.4 networks, which are characterized by short range, low bit rate, low power, and low memory usage. 6LoWPAN networks consist of devices that send data to full function devices and gateways that forward the packets outside the 6LoWPAN network. Common applications include automation and industrial monitoring.
Wireless HART is a wireless sensor networking technology based on HART that communicates process data over 2.4 GHz radio. It uses a wireless mesh network where each device can serve as a router. This provides redundant pathways. A network manager is responsible for config
The document discusses the history and development of wireless networks. It describes the progression from 1G analog networks to 2G digital networks to 3G broadband networks. It also defines different types of wireless networks including ad-hoc peer-to-peer networks and infrastructure networks using access points. Finally, it outlines some common applications that use wireless networking like satellite communication, wireless local loops, and cellular networks.
This document discusses various topics related to ad-hoc wireless networks including wireless network concepts, radio propagation mechanisms, characteristics of wireless channels, cellular networks, ad hoc networks, medium access control, routing protocols, multicasting, and transport layer protocols for ad hoc networks. It provides classifications and examples of different types of network architectures, protocols, and issues/challenges in ad hoc wireless networks.
MANET stands for mobile ad hoc network. It is a type of wireless network that can change locations and configure itself without a centralized administration. Nodes in a MANET can connect to each other to form a temporary network without any existing network infrastructure. Routing in MANETs is challenging due to the dynamic network topology, asymmetric links, and interference. Common routing algorithms for MANETs include distance vector, link state, and various protocols designed specifically for MANETs to handle mobility.
The document summarizes routing security in ad hoc wireless networks. It discusses the characteristics of ad hoc wireless networks and routing protocols used, including proactive, reactive, and hybrid protocols. It then covers various security attacks on routing protocols like passive attacks, active attacks, impersonation attacks, and attacks using modification or fabrication. Finally, it discusses some security mechanisms and routing protocols that aim to provide security, such as SEAD, Ariadne, SAR, and SRP.
An ad-hoc wireless network is a collection of wireless nodes that can dynamically be set up anywhere and anytime without using an existing network infrastructure or centralized administration. There are different types including wireless mesh networks, wireless sensor networks, and hybrid wireless networks. Wireless mesh networks provide many paths for data transfer between sources and destinations with advantages like high data rates and scalability. Wireless sensor networks consist of sensor nodes that monitor regions without infrastructure by working together. Hybrid wireless networks incorporate properties of multi-hop relaying along with existing infrastructure for higher capacity and flexibility. Applications include monitoring, tracking, location services, and future scopes involve connecting more devices and enabling access to real-world information.
The document discusses ad hoc wireless networks and their applications. It describes key characteristics of ad hoc networks including being self-organizing and lacking centralized administration. It outlines several applications of ad hoc networks such as military operations, emergency response, wireless mesh networks, and wireless sensor networks. It also examines important technical issues for ad hoc networks related to medium access, routing, multicasting, transport protocols, energy management, and deployment considerations.
The document discusses ad-hoc networks and their key characteristics. It describes several challenges in ad-hoc networks including limited battery power, dynamic network topology, and scalability issues. It also summarizes several ad-hoc network routing protocols (e.g. DSDV, AODV, DSR), addressing both table-driven and on-demand approaches. Additionally, it outlines some ad-hoc MAC protocols like MACA and PAMAS that aim to manage shared wireless medium access.
This document discusses the origins and development of ad hoc networks. It describes how packet radio networks (PRNETs) in the 1970s, developed by DARPA, were the first generation of ad hoc networks. PRNETs used multi-hop routing between mobile radio terminals and packet radios to communicate without fixed infrastructure. The document outlines the key components and routing techniques of PRNETs, including point-to-point and broadcast routing. It also discusses how subsequent generations in the 1980s-1990s focused on improving performance, scalability, and developing commercial applications like Bluetooth.
Mobile ad-hoc networks (MANETs) allow devices to connect without a centralized infrastructure by forming a multi-hop wireless network. MANETs are useful in situations where infrastructure is unavailable, expensive to set up, or where rapid deployment is needed. Routing in MANETs is challenging due to the dynamic topology, asymmetric wireless links, and interference. Common routing protocols for MANETs include DSDV, DSR, AODV, and protocols that use clustering or geographic position information to improve routing performance.
This document provides an introduction to mobile ad hoc networks (MANETs) and discusses associated research issues. It defines MANETs as infrastructureless, self-configuring networks formed spontaneously by wireless devices. Key characteristics of MANETs include dynamic topology, limited bandwidth, and lack of centralized management. The document outlines several research areas in MANETs, including power management, MAC layer protocols, routing, transport protocols, security, and data management. It discusses challenges in each area posed by the mobile and decentralized nature of MANETs.
This document discusses mobile ad-hoc networks (MANETs) and wireless sensor networks (WSNs). It defines a MANET as a network formed spontaneously by wireless mobile nodes without any preexisting infrastructure. Key characteristics of MANETs include dynamic topologies, energy-constrained operation, limited bandwidth, and security threats. Applications include collaborative work, crisis management, and personal area networks. The document also describes different routing protocols for MANETs including table-driven, source-initiated, and hybrid protocols. It then discusses challenges in WSNs such as ad-hoc deployment, limited resources, scalability, and fault tolerance and how these influence routing protocol design.
Lecture 1 mobile and adhoc network- introductionChandra Meena
This document provides an overview of a course on mobile and ad hoc networks. It lists two textbooks that will be used and states that the goal is to cover fundamental design issues and solutions for network architecture and protocols. It also lists some related websites and outlines the objectives of chapters that will introduce wireless communication technologies, network standards, and multiple access techniques for ad hoc networks.
This document provides an overview of wireless ad-hoc networks. It discusses the definition and types of multi-hop wireless networks. Some key technical challenges for ad-hoc networks are limited wireless range, mobility, and energy constraints. The document reviews several media access and routing protocols used in ad-hoc networks, including MACA, DSDV, AODV and DSR. It also discusses providing quality of service in ad-hoc networks and some of the challenges in routing, maintenance and variable resources. In conclusion, the document states that flexibility, low cost and applications make ad-hoc networks an essential part of future pervasive computing environments.
This document discusses routing protocols for ad hoc wireless networks. It begins by outlining some key issues in designing routing protocols for these networks, such as mobility, bandwidth constraints, and frequent topology changes. It then classifies routing protocols as being either table-driven, on-demand, or hybrid approaches. Table-driven protocols maintain consistent, up-to-date routing information through periodic table updates. On-demand protocols only discover routes when needed, to reduce overhead. The document proceeds to describe several examples of these different routing protocol types.
The document discusses mobile ad-hoc networks (MANETs). It provides an introduction to MANETs and their history. It describes different routing protocols for MANETs including reactive, proactive, and hybrid protocols. It discusses some problems with MANETs and applications of MANETs such as for business meetings. It proposes a solution for secure data transmission in MANETs and concludes with a comparison of MANET routing protocols.
Mobile Ad hoc Networks (MANETs) allow devices to connect spontaneously without infrastructure by acting as both hosts and routers, forwarding traffic in a multi-hop fashion. They face challenges from dynamic topology, limited bandwidth and security, and use reactive routing protocols like Dynamic Source Routing (DSR) that discover routes on demand through flooding route requests. MANETs have applications in military operations, disaster relief, vehicular networks, and personal area networks.
An ad hoc network is a type of wireless network that does not require a central router or base station. Nodes communicate directly with each other or through intermediate nodes in a multi-hop fashion without any fixed infrastructure. Routing and resource management are distributed. Common types include wireless mesh networks, wireless sensor networks, and hybrid wireless networks. Ad hoc networks face challenges related to medium access, routing, security, and resource constraints due to the lack of centralized control.
This document discusses mobile ad-hoc networks (MANETs) and wireless sensor networks. It describes how MANETs are self-configuring networks formed by mobile nodes connected wirelessly without any fixed infrastructure. Each node acts as a router to forward packets. Wireless sensor networks are similar but use smart sensor nodes that can sense environmental data and disseminate it through the network. Examples of MANET and sensor network applications include content sharing between devices, industrial plant monitoring, and traffic monitoring. Security challenges in these networks are also discussed.
The document summarizes a student project on improving energy efficiency in mobile ad hoc networks (MANETs) using random casting. The proposed approach aims to control overhearing, reduce packet loss, and improve quality of service. Simulation results show the DSR routing protocol performed better than AODV, AOMDV, and DSDV in terms of higher packet delivery ratio and lower packet loss. Future work includes analyzing the performance of the random cast architecture and applying it to more routing protocols and applications in MANET environments.
Mobile ad-hoc networks (MANETs) are self-configuring networks of mobile routers connected by wireless links. They form a random, changing topology as routers move freely and unpredictably. MANETs are suitable for emergency situations where infrastructure is not available. They use routing protocols that are either table-driven and proactively maintain routes, or on-demand driven where routes are created as needed. Examples of protocols discussed are DSDV, AODV, DSR, and TORA. MANETs face challenges from their changing topology, but enable communication in infrastructure-less scenarios.
This document discusses mobile ad-hoc networks (MANETs). It defines MANETs as collections of wireless mobile nodes that can dynamically form a network without any centralized administration. The document outlines the characteristics, mechanisms, transmission standards, routing protocols, applications, and future aspects of MANETs. It explains that MANETs are self-configuring, infrastructureless networks suitable for situations where fixed networks are not available or are too expensive to deploy.
The document discusses free computer science eBooks and technology news that are being provided. It includes links to blogs sharing this free content and encourages clicking on advertisements to support their work. It then discusses the topics of wireless technologies and Wi-Fi networks in particular, covering introductions, architectures, elements, how they work, topologies and configurations.
This document provides an overview of wireless networks and protocols. It discusses wireless personal area networks (WPANs) such as Bluetooth and infrared, wireless local area networks (WLANs) using IEEE 802.11 standards, and wireless metropolitan area networks (WMANs) such as WiMAX. For WLANs, it describes wireless access points, common network architectures, and media access control protocols including carrier sense multiple access with collision avoidance (CSMA/CA) and carrier sense multiple access with collision detection (CSMA/CD).
The document discusses Wi-Fi technology, including its standards, architecture, security techniques, and applications. It describes the IEEE 802.11 standards for Wi-Fi networks, including 802.11b, 802.11a, and 802.11g. It outlines the basic components of a Wi-Fi network including access points, Wi-Fi cards, and security measures. It also summarizes common Wi-Fi network configurations, topologies, and applications as well as security techniques such as SSID, WEP, WPA, and 802.1x access control.
The document discusses wireless local area networks (WLANs) and the IEEE 802.11 standard. It provides an overview of wired and wireless LANs, the development and specifications of IEEE 802.11, and differences between wireless and wired networks that 802.11 addresses like power management, security, and bandwidth. It also covers wireless LAN topologies, media access control, security issues, and physical layer standards defined in original 802.11 like frequency hopping spread spectrum and direct sequence spread spectrum.
6LoWPAN allows for low-cost wireless connectivity for applications with limited power and bandwidth needs. It provides IPv6 networking over IEEE 802.15.4 networks, which are characterized by short range, low bit rate, low power, and low memory usage. 6LoWPAN networks consist of devices that send data to full function devices and gateways that forward the packets outside the 6LoWPAN network. Common applications include automation and industrial monitoring.
Wireless HART is a wireless sensor networking technology based on HART that communicates process data over 2.4 GHz radio. It uses a wireless mesh network where each device can serve as a router. This provides redundant pathways. A network manager is responsible for config
The document discusses the history and development of wireless networks. It describes the progression from 1G analog networks to 2G digital networks to 3G broadband networks. It also defines different types of wireless networks including ad-hoc peer-to-peer networks and infrastructure networks using access points. Finally, it outlines some common applications that use wireless networking like satellite communication, wireless local loops, and cellular networks.
This document provides an overview of wireless networks. It describes different types of wireless networks including WLANs for local area connectivity, WMANs for metropolitan area networks, WPANs for personal area networks, and WWANs for wide area networks. It also discusses the IEEE 802.11 standards for wireless LAN technology and the protocols, frequency ranges, and devices associated with different standards such as 802.11b, 802.11g, and 802.11n. Additionally, it covers wireless network architectures including basic service sets, extended service sets, and distribution systems.
The document provides an overview of wireless networks, including their basic components, hardware, modes of operation, security methods, speed and range factors, wireless spectrum usage, evolution of mobile wireless technologies, and traffic routing methods. It describes key differences between wired and wireless networks, and ad-hoc versus infrastructure wireless network modes.
Wi-Fi uses radio waves to transmit data through the air according to the IEEE 802.11 standards. It allows computers and other devices to connect to the internet and each other wirelessly. The 802.11 standards include 802.11b, 802.11a, 802.11g, 802.11n, and 802.11ac which provide different speeds and capabilities. Wi-Fi networks use access points, wireless cards, and security protocols like WEP, WPA, and WPA2 to transmit data securely between devices over short ranges.
Wireless networking technology uses wireless stations like computers or devices with radios to transmit and receive data without wires. There are two main types of wireless networks: infrastructure networks with an access point that devices connect to and ad-hoc peer-to-peer networks without an access point where devices connect directly. Wireless networks use radio frequencies and transmission methods like frequency hopping spread spectrum or direct sequence spread spectrum to transmit data over the air. Newer standards are developing technologies like MIMO that use multiple antennas to improve wireless network performance and speeds.
Wireless networks transmit data through electrical waves without the use of wires or cables. They consist of basic components like wireless network cards, access points, routers, and antennas. There are different types of wireless networks including WLANs for local areas, WPANs for personal areas, WMANs for metropolitan areas, and WWANs for wide areas. Wireless network speed and range depend on factors like the technology used, distance between devices, and interference.
The document provides an overview of wireless networks, including:
1. Wireless networks interconnect systems capable of providing mobile service within a geographic region without physical cables.
2. Components include base stations, mobile switching centers, and public telephone networks. Wireless networks offer mobility, lower installation costs, and flexibility over wired networks but have lower speeds and security.
3. Basic components are wireless network interface cards, access points, and hardware like antennas. Wireless modes include ad-hoc peer-to-peer and infrastructure with access points. Security methods are SSIDs, MAC filtering, and encryption.
This document provides an overview of wireless communication and networking. It defines wireless communication and discusses wireless network topologies and integration with wired networks. It describes the IEEE 802.11 wireless standards including 802.11a, 802.11b, 802.11g and 802.11n. It also discusses wireless networking devices such as access points, wireless LAN controllers, and bridges. Finally, it covers common wireless security measures including SSID hiding, MAC address filtering, static IP addressing, 802.1X authentication, WEP, WPA, and WPA2 encryption.
A computer network connects multiple computers allowing them to communicate and share resources. It requires a minimum of two computers connected by cables or wirelessly with network interface cards. There are different types of networks including local area networks covering a small area like a building, metropolitan area networks spanning a city, and wide area networks covering larger distances like the internet. Networks can be configured in a peer-to-peer setup where computers act as equal partners or a client-server setup with dedicated server computers.
This chapter discusses exploiting wireless networks. It begins by explaining wireless technology and standards such as 802.11. It describes the basic components of a wireless network including access points and service set identifiers. It then covers wireless authentication methods like Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA), and wireless hacking tools and techniques like wardriving. The goal is to help security professionals understand wireless networks and how attackers may exploit them.
These ppt are the part 2 of mobile computing concepts. These ppt defines the following things
Wireless Networking
Wireless LAN Overview: IEEE 802.11
Wireless applications
Data Broadcasting
Bluetooth
TCP over wireless
Mobile IP
WAP: Architecture, protocol stack, application
environment, applications.
This document discusses wireless networking technologies including IEEE 802.11 (Wi-Fi), Bluetooth, and their standards and specifications. It describes the basic concepts of wireless LANs including connecting devices, medium access control, basic service sets, extended service sets, frame formats, and addressing mechanisms. It also discusses Bluetooth standards, layers, and topologies such as piconets and scatternets.
The document discusses the components and characteristics of wireless local area networks (WLANs). It describes the basic components of a WLAN including access points, WLAN adapters, and software. It discusses characteristics such as typical ranges of access points, the number of users supported, and how multiple access points can be connected. It also covers topics such as roaming between access points, infrastructure versus ad-hoc network architectures, and standards like IEEE 802.11.
Stoe Noll Westin Data Transmission PresentationJennifer Stoe
The document summarizes various methods of data transmission throughout history including Morse code, telegraphs, telephones, computers, and modern wireless technologies. It describes how data is encoded and transmitted through different channels like wired, wireless, satellite, and cellular networks. The key technologies discussed are analog and digital transmission, protocols, wired connections like Ethernet and USB, and wireless standards like Bluetooth, WiFi, WiMAX, and cellular networks.
Similar to Wireless communication & adhoc networks (20)
1. Wireless Communications & Adhoc NetworksJokhio Sultan Salahuddin Kohistani07CS24Computer Communication & Network ManagementDepartment of Computer Systems EngineeringMUET Jamshoro
4. Wireless Without wires or without physical conducting material or carrier.Unguided MediumCommunicationInformation propagation from source to destination.Hence, Wireless Communication;Transfer of information over a distance without utilizing electrical conductors or "wires".Wireless Communications (Introduction)
11. Wireless Local Area Networks (WLANs)Wireless Wide Area Networks (WWANs)Wireless Communications (Computer Networks)
12. A LAN with every end device/node having wireless access to share hardware, software and other devices and Resources.Wireless Communications (Computer Networks: WLANs)other devices
14. Limited to single roomb/c waves does not penetrate opaque wallsGHz to 400 THzExcellent potential for data transmissionKeyboard, mouse, Printers, and end devices can communicateOriginal standard data rate of 75 kbps for a distance up to 8 m. The recent standard defines a data rate of 4 Mbps.Wireless Communications (Computer Networks: WLANs: Transmission Techniques: Infrared LANs)
15. IEEE 802.11 committee StandardsMakes use of Spread Spectrum transmission techniques.Most Popular type of WLANUsable without having to go to licensing procedureOperates in ISM [Industrial, Scientific, and Medical {902-928MHz (915MHz), 2.4-2.4835GHz (2.4GHz), 5.725-5.825GHz(5.8GHz)}] microwave band.Higher the frequency, Higher the potential Bandwidth.Wireless Communications (Computer NWs: WLANs: Transmission Techniques: Spread Spectrum LANs)
17. Access Point (AP)Basic Services Set (BSS)Coordination FunctionDistribution SystemExtended Services Set (ESS)MAC protocol data Unit (MPDU)MAC service Data Unit (MSDU)Station/Node/End DeviceWireless Communications (Computer NWs : : : IEEE 802.11 Components)
18. Access Point (AP)Also called Wireless Access point (WAP) or central Base Station.a device that allows wireless communication devices to connect to a wireless network using Wi-Fi, Bluetooth or related standards.WAP or AP connects to router or any other Layer 3 deviceCan perform switching function b/w wireless devicesWired devices can also be connected to itWireless Communications (Computer NWs : : : : Access Point)
20. Basic Services Set (BSS)Building block of a wireless LAN.is made of stationary or mobile wireless stations and an optional central base station, also known as the access point (AP).*A BSS without an AP is called an ad hoc networkABSS with an AP is called an infrastructure network.Wireless Communications (Computer NWs : : : : Basic Services Set)
21. Access Point is OptionalWithout Access point stations still can communicationWireless Communications (Computer NWs : : : : Basic Services Set)
22. Coordination Functionlogical functionUses CSMA techniques with CADetermines when a station is permitted to transmitand may able to receive the PDU.Distribution FunctionA system used to interconnect A set of BSSs& integrated LAN to create ESSWireless Communications (Computer NWs : : : : Coordination and Distribution Function)
23. An Extended service set (ESS) is made up of two or more BSSs with APs. In this case, the BSSs are connected through a distribution system, which is usually a wired LAN. The distribution system connects the APs in the BSSs. IEEE 802.11 does not restrict the distribution system; it can be any IEEE LAN such as an Ethernet.Wireless Communications (Computer NWs : : : : Extended Services set)
24. MAC Protocol Data Unit (MPDU)The unit of data exchanged b/w two peer MAC entities using the services of the physical layer.MAC Protocol Data Unit (MSDU) Information that is delivered to the user.Stations Any device that contains an IEEE 802.11 conformant MAC and Physical layer.Wireless Communications (Computer NWs : : : : MPDU, MSDU & Stations)
27. Increase in Portable DevicesSimplicity and FlexibilityReliable and SecureHigher Data Rates, Speed and ReachTechnology Cost SavingsTrendWireless Communications (Computer NWs : : : : Why Wireless..?)
28. Data less secureThe waves could be damaging to our healthModulation technique required for efficient transmission.Wireless Communications (Computer NWs : : : : Why not Wireless)
29. AuthenticationA function that determines whether a Station is allowed to participate in network communication.Implementing network encryptionSecurity ProtocolsWEP (Wireless Equivalency protocol)WPA (Wireless Protected Access)Wireless Communications (Security)
30. Data is In AirEven with Encryption creative minded hackers can sniff your data and corporate confidential information.Even with encryption, the data between client and AP’s are available for anyone to capture.Danger for Humanity…Wireless Communications (Issues)
31. An Adhoc network is a peer-to-peer network (no central device) set up temporarily to meet some immediate needs.When all station are mobile stations, with no connection to other BSSs, the BS is called IBSS(Independent BSS), some times referred as Ad hoc network…In simple words, it is decentralized network…Wireless Communications (Adhoc Networks)
35. The World Wide web (Internet)Wikipedia-The Free Encyclopediahttp://www.wikipedia.org/enIEEEhttp://www.ieee.orgACMhttp://www.acm.orgBooksComputer NetworksTanebaum S. Andrew 4th ed.Data Communications and NetworkingForozon A. Behrouz 4th ed.Data and Computer CommunicationsStallings William 6th ed.References