計概報告家妃.Ppt
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This document discusses wireless personal area networks (WPANs) and some common WPAN technologies used within short distances of less than 5 meters. It describes Bluetooth, which was originally proposed in 1998 for short-range wireless applications between devices like phones and cameras. Bluetooth uses frequency hopping spread spectrum in the 2.4 GHz band. ZigBee is also discussed as dealing with very low data rates but long battery life for applications like wireless sensor networks.
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Wireless Personal Area Networks (WPAN): Lowrate amd High Rate
This document provides an overview of wireless personal area networks (WPANs) and discusses two specific WPAN standards, 802.15.3 (WPAN-LR) and 802.15.13a (WPAN-HR). It describes the components and design considerations of wireless sensor networks, including their applications, network models, protocol stacks involving different layers, and power, mobility and task management planes. Diagrams are included illustrating a WPAN standard summary, wireless sensor network model, sensor node components, and the sensor network protocol stack.
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Wireless Communication ppt
In layman language it is communication in which information is transferred between two or more points without any wire
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Wireless networks allow devices to connect to each other or to access points without the use of cables. Digital devices represent information using binary digits of 0 and 1. Mobile phones and other wireless devices now access the internet for photos, videos, music and more through high-speed wireless networks. Wireless transmission uses technologies like microwave systems and communication satellites. Common wireless devices include cell phones, PDAs and smartphones. Wireless networks are convenient, flexible and lower cost than wired networks. Standards like GSM, CDMA, Bluetooth and Wi-Fi govern wireless connectivity and communication.
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This document provides an overview of wireless personal area networks (WPANs), with a focus on Bluetooth technology. Some key points:
- WPANs like Bluetooth operate over short ranges (around 10 meters) and support connections between devices in close proximity, using the ad hoc network model.
- The IEEE 802.15 standards group develops specifications for WPANs, adopting parts of the Bluetooth standard. It focuses on high and low data rate networks.
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Wireless networks allow devices to connect to each other or to access points without the use of cables. Digital devices represent information using binary digits of 0 and 1. Mobile phones and other wireless devices now access the internet for photos, videos, music and more through high-speed wireless networks. Wireless transmission uses technologies like microwave systems and communication satellites. Common wireless devices include cell phones, PDAs and smartphones. Wireless networks are convenient, flexible and lower cost than wired networks. Standards like GSM, CDMA, Bluetooth and Wi-Fi govern wireless connectivity and communication.
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This document summarizes wireless communication, including its introduction, applications, advantages and disadvantages, ways of communication, and security concerns. Wireless communication allows for the transfer of information over a distance without wires by using unguided media like radio waves. It has applications in WiFi, Bluetooth, and infrared. The advantages include simplicity, flexibility, reliability, higher data rates and reach, and cost savings, while the disadvantages are potential lack of data security, health risks from waves, and need for better technology and security protocols to address hacking risks from the shared wireless medium.
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Bluetooth
Bluetooth is a short-range wireless technology that allows data exchange between devices like phones, laptops, and printers. It was developed in 1994 and uses radio waves in the 2.4 GHz band to connect devices within a 10-100 meter range. Bluetooth devices can form ad-hoc networks called piconets to share data and voice signals. While convenient, Bluetooth has limitations like low data rates, short range, and potential security issues if not configured properly. It finds applications in wireless headsets, car infotainment systems, and wireless speakers. Future developments aim to improve bandwidth, reduce interference, and streamline connection setup while maintaining compatibility.
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計概報告 家妃 970701
Wireless Personal Area Networks (WPANs) allow for wireless communication over short distances and include technologies like Bluetooth, ZigBee, and WiMax. These technologies provide wireless connectivity in personal, local area networks to connect devices like phones, computers, printers, and other electronics without wires. WPANs offer connectivity options beyond traditional wireless standards like GSM, WAP, GRPS, PHS and upcoming technologies like ultra-wideband communications.
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Wireless communication involves transmitting information over distances without wires through technologies like radio waves, infrared, Wi-Fi, and Bluetooth. There are several types of wireless communication including infrared, satellite, radio broadcasting, and microwave transmission which have a variety of applications. While wireless communication provides flexibility and easy setup, limitations include weak signals blocked by obstacles and lower bandwidth compared to wired connections. Overall, wireless communication plays a major role in modern society and enables monitoring patients from long distances.
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Wireless communication technologies allow for mobility and flexibility through radio signals rather than wired connections. They include technologies like Bluetooth, WiFi, wireless LANs and MANs that enable applications such as video conferencing, telemedicine, and distance learning. Common wireless standards are IEEE 802.11 for WiFi and IEEE 802.16 for WiMax. Wireless networks face challenges of limited spectrum availability, lower bandwidth and higher delays compared to wired networks. Emerging wireless technologies are expanding connectivity and access to services for more users.
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Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for communication. It was invented by Professor Harald Haas and is a faster, more secure, and cheaper alternative to Wi-Fi. Li-Fi uses visible light communication and LED light bulbs to transmit data, allowing for much higher speeds than Wi-Fi. Some challenges remain around light not passing through objects and interference from other light sources, but Li-Fi shows promise for applications like traffic lights, hazardous environments, and undersea use where Wi-Fi cannot reach.
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The document provides an overview of wireless communication technologies including Bluetooth, Infrared Data Association (IrDA), HomeRF, IEEE 802.11 WiFi, 802.16 WiMax, and wireless hotspots. It defines wireless communication as the transfer of information between two or more points not connected by an electrical conductor using radio waves. Key aspects of various wireless standards are discussed, such as operating frequency and speed, range, and security features. Limitations of wireless technologies including a finite radio spectrum and potential for interference are also noted.
WIRELES NETWORK
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.
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Bluetooth is a wireless standard that allows electronic devices to connect and exchange information within short ranges without wires or cables. A Bluetooth connection forms a piconet, with up to 8 devices connected to a single master device using radio frequency. Bluetooth addresses security, interference, and power consumption concerns. It uses frequency hopping, authentication, and encryption to secure connections between devices in a piconet.
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Bluetooth is a wireless technology standard for exchanging data over short distances. It was originally conceived as a cable replacement and can be used for data transfer, wireless audio, etc. Bluetooth operates in the 2.4 GHz spectrum and has an effective range of about 10 meters. It works by establishing short-range radio links called piconets that allow devices to connect and exchange information securely in an ad-hoc manner. The technology has grown in popularity and future versions aim to improve capabilities such as speed, range and security.
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This document discusses Bluetooth technology. It begins with an introduction to Bluetooth, including its origins in 1994 and key founders. It then covers the different versions of Bluetooth and their maximum data transfer rates. The document outlines the main features of Bluetooth like low power consumption and low cost. It provides examples of common Bluetooth applications such as wireless networking between devices, using peripherals, and transferring files between devices. Finally, it discusses the advantages of Bluetooth such as not requiring line of sight and being cable-free, as well as the disadvantage of slower speeds compared to other wireless technologies.
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This document summarizes wireless communication, including its introduction, applications, advantages and disadvantages, ways of communication, and security concerns. Wireless communication allows for the transfer of information over a distance without wires by using unguided media like radio waves. It has applications in WiFi, Bluetooth, and infrared. The advantages include simplicity, flexibility, reliability, higher data rates and reach, and cost savings, while the disadvantages are potential lack of data security, health risks from waves, and need for better technology and security protocols to address hacking risks from the shared wireless medium.
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This document provides an overview of Bluetooth technology. It defines Bluetooth as a short-range wireless technology originally developed for exchanging data over short distances between fixed and mobile devices. The document then discusses the history of Bluetooth, its key characteristics such as frequency range and data rates, how it works using frequency hopping spread spectrum, its security features and advantages/disadvantages. Finally, it outlines some applications of Bluetooth and envisions its future including higher data rates, reduced power consumption and increased range.
Bluetooth paper (IEEE)
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Bluetooth
Bluetooth is a short-range wireless technology that allows data exchange between devices like phones, laptops, and printers. It was developed in 1994 and uses radio waves in the 2.4 GHz band to connect devices within a 10-100 meter range. Bluetooth devices can form ad-hoc networks called piconets to share data and voice signals. While convenient, Bluetooth has limitations like low data rates, short range, and potential security issues if not configured properly. It finds applications in wireless headsets, car infotainment systems, and wireless speakers. Future developments aim to improve bandwidth, reduce interference, and streamline connection setup while maintaining compatibility.
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計概報告 家妃 970701
Wireless Personal Area Networks (WPANs) allow for wireless communication over short distances and include technologies like Bluetooth, ZigBee, and WiMax. These technologies provide wireless connectivity in personal, local area networks to connect devices like phones, computers, printers, and other electronics without wires. WPANs offer connectivity options beyond traditional wireless standards like GSM, WAP, GRPS, PHS and upcoming technologies like ultra-wideband communications.
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This document summarizes the Bluetooth protocol stack. It discusses the baseband protocols, link manager protocol, L2CAP, service discovery protocol, and various adopted protocols like RFCOMM, TCS, PPP, TCP/IP, WAP, and OBEX. The baseband and link control layer control the physical RF link and links can be either SCO or ACL. The link manager protocol handles link setup and power modes. L2CAP provides multiplexing and segmentation. Service discovery allows finding and searching for Bluetooth services. RFCOMM provides emulation and transport capabilities for cables replacement. TCS deals with telephony control and configurations. Adopted protocols allow communication with other Bluetooth devices and bringing internet to phones.
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Bluetooth is a wireless technology standard that allows for short-range transmission of data between fixed and mobile devices over UHF radio waves. It was developed in 1994 by Ericsson and later standardized by the Bluetooth Special Interest Group. Bluetooth uses short-range high-frequency communication and operates in the unlicensed ISM band at 2.4 GHz. It connects devices within a 10-100 meter range, allowing for data transfer between devices like phones, laptops, printers and more without cables.
Wireless Body Area Networks
This document discusses wireless body area networks (WBANs) and some of the key considerations for their design and implementation. WBANs allow for communication between devices worn on or implanted in the human body. Key application areas include healthcare, fitness/sports, defense, and entertainment. Moving communications to higher millimeter wave frequencies offers advantages like increased data rates and security, but introduces challenges from atmospheric absorption and varying channel characteristics based on the human body. Ongoing research seeks to better characterize the on-body communication channel and develop optimized antennas and sensor network designs for WBANs.
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This document provides an overview of wireless personal area networks (WPANs), including Bluetooth, ZigBee, and Ultra-Wideband. It describes the key features and applications of each technology, how their protocols are structured, and how they compare to each other. Bluetooth supports data rates up to 2 Mbps over short ranges and is used in devices like phones, laptops, and printers. ZigBee focuses on low power consumption and supports thousands of nodes in a mesh network for uses like smart homes and buildings. Ultra-Wideband provides high data rates over short ranges and is used in applications like TVs, DVD players, and mobile devices.
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Bluetooth technology allows devices to connect wirelessly via piconets and scatternets. Bluetooth profiles define how devices interconnect and communicate for various uses like file sharing, headsets, networking, and more. Bluetooth offers security features to protect connections and addresses issues like bluejacking and bluesnarfing. It has applications in home automation, connectivity between devices like phones and printers, and potential future uses.
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Wireless TechnologiesPresented bySean Shields AndGabriel.docx
Wireless Technologies
Presented by
Sean Shields
And
Gabriel Taveras
Definition
Term “Wireless” refers to all the communications sent and received without wires.
So Wireless Technology
Means a technology that use radio waves to transmit or receive data.
Wi-Fi
Bluetooth
Cellular
Wimax
TYPES OF
TECHNOLOGIES
INTRODUCTION:
Wireless Fidelity termed as Wi-Fi uses the IEEE 802.11 specification to create a wireless local-area network.
A Wi-Fi network basically consists of a wired connection to the Internet that leads to a wireless router for transmutation and receiving data from individual devices, connecting them not only to the outside world but also to each other.
HOW WIFI WORKS?
1. All devices use a wireless adapter to convert request into a radio signal and broadcasts it into the air.
2. The Wi-Fi device, or wireless router, picks up the signal and translates it back into its original form.
3. The router passes the request to the Internet using a hardwired connection.
4. The Internet returns the requested information to the router across the same connection.
5. The router converts the information into a radio signal and broadcasts it into the air.
6. The computer or cell phone's wireless adapter picks up the information and displays it on your screen
WIFI TOPOLOGIES
Wifi have following topologies
AP-based topology (Infrastructure Mode)
Peer-to-peer topology (Ad-hoc Mode)
Point-to-multipoint bridge topology
Wi Fi Network
Wireless Standards
802.11
In 1997, the Institute of Electrical and Electronics Engineers (IEEE) created the first WLAN standard. They called it 802.11 after the name of the group formed to oversee its development. Unfortunately, 802.11 only supported a maximum network bandwidth of 2 Mbps - too slow for most applications. For this reason, ordinary 802.11 wireless products are no longer manufactured.
Wireless Standards
802.11b
IEEE expanded on the original 802.11 standard in July 1999, creating the 802.11b specification. 802.11b supports bandwidth up to 11 Mbps, comparable to traditional Ethernet.
Wireless Standards
802.11a
Supports bandwidth up to 54 Mbps and signals in a regulated frequency spectrum around 5 GHz. This higher frequency compared to 802.11b shortens the range of 802.11a networks. The higher frequency also means 802.11a signals have more difficulty penetrating walls and other obstructions.
Wireless Standards
802.11g
Attempts to combine the best of both 802.11a and 802.11b. 802.11g supports bandwidth up to 54 Mbps, and it uses the 2.4 Ghz frequency for greater range. 802.11g is backwards compatible with 802.11b, meaning that 802.11g access points will work with 802.11b wireless network adapters and vice versa.
Wireless Standards
802.11n
The newest IEEE standard in the Wi-Fi category is 802.11n.
802.11n connections support data rates of over 100 Mbps. 802.11n also offers somewhat better range over earlier Wi-Fi standards due to its increased signal.
Wireless lan
A wireless local area network (WLAN) allows devices to connect to a local area network through radio waves instead of cables. WLANs use Wi-Fi or Bluetooth protocols and can connect many device types within a range of hundreds of feet. They utilize wireless access points that connect clients to the network and can bridge to wired networks. WLANs offer mobility over wired LANs but have disadvantages like slower speeds, weaker security, and interference issues compared to wired connections.
Wireless LANs and Mobile Networks
The document provides information on the history and types of wireless LANs and mobile networks. It discusses:
- The early development of wireless technologies from 1971 including ALOHAnet and experimental wireless networks. Standards like IEEE 802.11 were introduced from 1997.
- Types of wireless LANs including infrared, spread spectrum, and narrowband microwave networks. Key standards are also discussed like IEEE 802.11, HiperLAN, Bluetooth, and HomeRF.
- Challenges for wireless networks including improving data rates, addressing security and interference issues, and ensuring system interoperability. Seamless handoff between access points is also discussed.
UWB and applications
UWB technology uses very short pulse signals that have a wide frequency spectrum, allowing it to provide high data rates over short ranges. It has advantages over other wireless technologies like resistance to multipath interference and ability to detect moving objects. The document discusses UWB modulation techniques, FCC regulations, and applications of UWB in areas like communications, radar, and geolocation. Major application areas discussed are wireless personal area networks, wireless USB, and ground penetrating radar.
Pan seminar
Personal area networks (PANs) allow communication between devices within close proximity of an individual. There are two main types of PANs - wired and wireless. Wireless PANs (WPANs) use technologies like infrared, Bluetooth, and HomeRF to connect devices within 10 meters. Common WPAN devices include PDAs, phones, and laptops. WPANs offer advantages like easy setup and portability but have limitations such as low data rates and limited range compared to wireless local area networks. WPANs can be used in education for sharing files between devices and printing wirelessly. The future of WPANs involves using human body signals to transmit data between devices.
Wireless networks by Engineer Geremew T,
Wireless networks can use a variety of technologies to connect devices without cables over different ranges. Short-range personal area networks connect devices within arm's reach using technologies like Bluetooth, while local area networks use WiFi to connect devices within a building. Wireless performance is ultimately limited by available bandwidth and the signal-to-noise ratio between transmitting and receiving devices. Real-world throughput is often lower than theoretical maximums due to interference, distance between devices, and other factors that impact signal quality.
WI-FI and Wi Max
Wi-Fi and WiMAX are wireless networking technologies. Wi-Fi uses radio waves to connect devices in local areas like homes and offices, while WiMAX can connect devices over longer distances of up to 30 miles, making it suitable for connecting entire cities. Both technologies transmit data using radio signals in specific frequency ranges and support various transmission speeds and encryption standards. Wi-Fi devices connect directly to a local wireless router or access point, while WiMAX uses wireless towers similar to cellular networks to connect multiple users over wider areas.
WLL,WLAN & BLUETOOTH
This document summarizes key information about wireless communication technologies including Wireless Local Loop (WLL), Wireless Local Area Network (WLAN), and Bluetooth.
WLL uses radio signals to connect subscribers to telephone networks as an alternative to copper wiring, reducing construction and operating costs. WLAN allows wireless connectivity between devices within a limited area like a home or office, providing installation flexibility and reduced costs compared to wired networks. Bluetooth operates in the unlicensed 2.4 GHz band using frequency-hopping spread spectrum, chopping up and transmitting data across multiple bands to enable short-range wireless communication between devices.
Wireless-Network-Technologies.pptx
Wireless networks use radio waves or infrared signals to transmit data between devices without requiring physical wired connections. They provide flexibility, mobility and convenience by allowing devices like smartphones, laptops and tablets to connect to a network without being tethered to a specific location. Common types of wireless networks include wireless local area networks (WLANs), wireless metropolitan area networks (WMANs), wireless personal area networks (WPANs) and wireless wide area networks (WWANs). Wireless technologies like Wi-Fi, Bluetooth, Zigbee and LTE enable wireless connectivity and communication over different ranges.
Wireless connectivity for iot
The document discusses various wireless connectivity technologies for internet of things applications. It introduces concepts like frequency bands, communication protocols, network topologies, and specific technologies including 6LoWPAN, Bluetooth, WiFi, and ZigBee. Each technology is described in terms of its data rates, range, advantages, and disadvantages. The conclusion states that the key challenge is selecting the appropriate connectivity technology for effective implementation of internet of things applications.
What is the 2.4 GHz Wifi Bluetooth.pdf
The document discusses 2.4 GHz WiFi, Bluetooth, and Zigbee wireless technologies. It explains that while they all operate in the 2.4 GHz frequency band, they differ in their protocols and use cases. Bluetooth uses FHSS and is suited for personal area connectivity between devices within 10 meters. WiFi uses IEEE 802.11b and provides wireless internet access over larger ranges of up to 100 meters. Zigbee is used more for industrial applications requiring low power, low cost, and stable networking.
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計概報告家妃.Ppt
- 1. Wireless Personal Area Network ， WPAN 工系 林妃 教 家
- 2. NB: Wireless Communications Center In the near feature, no matter where your are, you could use wireless communications via NB.
- 3. Wireless Technology Used in NB Nowadays, we could only use wireless communications via NB within limit distance . WLAN WPAN - 802.11b - Bluetooth - 802.11a - Infrared rays - 802.11g < 50 m <5m
- 4. Wireless Personal Area Network WPAN Bluetooth ZigBee WiMax GSM, WAP, GRPS, PHS , UWB
- 5. Infrared ray Difused Directed
- 6. Bluetooth (1/2) Bluetooth is an emerging technology for short-range, low power wireless applications. The original purpose of Bluetooth proposed by Ericsson, IBM, Nokia, Intel, and Toshiba in February 1998. is used to replace cables with RF transmission and apply to cellular phones, PDAs, digital Cameras
- 7. BlueTooth (2/2) BlueTooth is an open standard version of WPAN (Wireless Personal Area Network). Identical to IEEE 802.11b, BlueTooth v1.x adopts 2.4 GHz as its operation frequency band but it utilizes FHSS (Frequency Hopping Spread Spectrum) as its modulation scheme. However, compared with IEEE 802.11, BlueTooth has different market partition The hopping frequency of BlueTooth is 1600 hops per second, the frequency spectrum is normally divided into 79 channels with 1 MHz channel spacing per channel.
- 8. ZigBee ZigBee deals with low data rate but very long battery life (months or even years) and very low complexity.The first edition of the 802.15.4 standard was released in May 2003. In March 2004 ZigBee has two PHY layers that operate in two separate frequency ranges: 868/915 MHz and 2.4GHz.
- 11. ~Thanks for Your Time~