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See all Premium member Presentation Transcript Slide 1: Miss Gurvinder kaur CONTENT : : CONTENT : Introduction of mobile computing Goals of mobile computing Example of mobile computing Framework of mobile computing Wireless delivery technology and switching methods Mobile info access devices Mobile data internetworking standards Cellular data communication protocols Application of mobile computing Advantages and disadvantages of mobile computing Conclusion Introduction of : Introduction of DEFINITION : DEFINITION Mobile computing means different things to different people . The key feature of mobile computing environment is that the user need . It is important for persons who travel away from their primary workplace. GOAL : GOAL The main goal of mobile computing is to work toward true computing freedom from anywhere , anytime and operate as if they were sitting in the “HOME” or “OFFICE” EXAMPLE : EXAMPLE Business professionals are working on a project with colleagues . A short time after making some crucial edits to the new product design , they plugs in the pc , hits a few keys and sends the version. Slide 7: MOBILE USERS WILL BE CONSUMERS AS WELL AS PRODUCERS OF DATA. THE EMPLOYEE IN THE FIELD COULD BE INITAING PRODUCTION ACTIVITY BY TAKING ORDERS AND PERFORMING ORDER ENTRY ROLE. Slide 8: MOBILE COMPUTING FRAMEWORK WIRELESSDELIVERY TECHLONOGY AND SWITCHING METHODS MOBILE INFO ACCESS DEVICES MOBILE DATA INTERNETWORKING STANDARDS AND EQUIPMENTS MOBILE COMPUTING BASED BUSINESS APPLICATION WIRELESS DELIVERY TECHNOLGY AND SWITCHING METHODS : WIRELESS DELIVERY TECHNOLGY AND SWITCHING METHODS METHODS Radio based Light based Land based Satellite based RADIO BASED COMMUNICATION : RADIO BASED COMMUNICATION Radio frequency signals that travel over frequencies from 100khz to 20 GHz. Slide 11: TYPES OF RF COMMUNICATIONS One -way Two-way local Covers 10 miles Covers 6 miles Covers quarter miles THE AVERAGE RANGE FOR LOCAL AREA RF EQUIPMENT IS FROM 30 FEET TO 100 YARDS LAND BASED RADIO SYSTEMS : LAND BASED RADIO SYSTEMS These systems send and receive data using low power transmitters and receivers. Private packet network. Circuit switched cellular services. Wireless WAN including spread spectrum. CELLULAR COMMUNICATION : CELLULAR COMMUNICATION Today ,the industry is moving simultaneously in three directions. 1. INCREASING CAPABILITY AND WIDE SPREAD COVERAGE FOR CORDLESS TELEPHONES : Cellular technology is evolving toward taller base station antennas and larger cells to provide economical coverage of populated areas. 2. DECREASING CELL SIZE AND POWER LEVELS FOR HAND HELD AND VEHICULAR CELLULAR RADIO: Antennas within buildings to provide higher overall capacity and to provide better coverage to the lower power cellular pocket phones that are now in increasingly wide spread usage. SPECIALIZED WIRELESS DATA SYSTEMS : SPECIALIZED WIRELESS DATA SYSTEMS These data oriented wireless systems are also emerging through cellular packet data systems and smaller area coverage. WORKING OF A CELL In the cellular systems, the areas of coverage are divided into hexagonal cells that overlap at the outer boundaries . communication takes place through a grid of transmitters and receivers each one called cell. The average cell is 2-10 miles across with actual size depending on the number of users in the cell. FREQUENCIES ARE DIVIDED INTO CELL BANDS WITH BUFFER ZONE TO PREVENT JAMMING OF NEIGHBOURING CELLS FREQUENCIES. Slide 15: Mobile telephone switching office (MTSO) Overlap coverage Receiver\ transmitter Other MTSO’S Other MTSO’S Cell structure with radio transceivers HAND OFF PROCES as a cellular device such as portable phone ,moves from one spot to another the signal may drop off momentarily due to movement from the area covered by one cell into the area covered by different cell. : HAND OFF PROCES as a cellular device such as portable phone ,moves from one spot to another the signal may drop off momentarily due to movement from the area covered by one cell into the area covered by different cell. A B BS1 BS2 Slide 17: Handset Handset ok Go ahead ok Use channel 3 Outgoing call message Call on channel 4 I am here Unit 6 where Are you transceiver Outgoing and incoming call handshake between transceiver and handset Slide 18: Log-on :Each cellular handset is assigned a unique identity or numeric arrangement module (NAM). Monitoring: Once the handset is powered on monitors the control channels to get information on local paging channels. Incoming calls: When an incoming call is received by mobile telephone switching office (MTSO),it sends a signal to all the cells in that traffic area. Outgoing calls: To make a call the user enters the telephone number and transmit it to the MTSO by an available access channel. WIRELESS PACKET DATA NETWORK : WIRELESS PACKET DATA NETWORK Most wireless data schemes use “packet” techniques for transferring data .packet radio is a communications method that transmits packets of data over a network via signals. WORKING : WORKING A special transceiver known as RF modem breaks down data into 128 byte pieces or packets. It then transmit a stream of these packets into the air. Each packet is numbered, so that message can be reassembled at the receiving end. If a packet is not received in good condition the receiving service automatically asks the sending modem to resend the missing receive other packets. SATELLITE NETWORKS : SATELLITE NETWORKS satellite network allow global communication and serve thousands of locations all over the world. Satellite networks are useful in any situation where data need to be dispersed to or gathered from many remote nodes where end to end delay is not a primary concern. INFRARED OR LIGHT-BASED MOBILE COMPUTING : INFRARED OR LIGHT-BASED MOBILE COMPUTING Infrared works by sending pulses of light emitting diode to a photo sensor that decodes the signals . Infrared devices like TV remote controls which can only send signals , computing device both sending and receiving infrared signals. MOBILE INFORMATION ACESS DEVICES : MOBILE INFORMATION ACESS DEVICES portable computers Hybrid pen computers Personal digital assistant Palmtops Cellular modems and PCMCIA MOBILE DATA INTERNETWOKING STANDARDS : MOBILE DATA INTERNETWOKING STANDARDS CODE DIVISION MULTIPLEACCESS: it has been used in military satellite systems for decades because it is secure. CDMA is a wide band “spreads “ multiple conversions across a wide segment of the cellular broadcast spectrum. TIME DIVISION MULTIPLE ACCESS : TIME DIVISION MULTIPLE ACCESS TDMA is the first digital system standardized in north America. It squeezes three calls onto a single 30 KHz transmission channel . calls are given separate time slots on a frequency , layered in between other signals and transported from cell site to cell site. CELLULLAR DATA COMMUNICATIONS PROTOCOLS : CELLULLAR DATA COMMUNICATIONS PROTOCOLS CIRCUIT SWITCHED CELLULAR TRANSMISSION: In wireless cellular communication a cell phone is connected to a cellular modem ,which in turn is linked to a mobile unit via a data terminal equipment cable. CELLULAR DIGITAL PACKET DATA: Cellular digital packet is a digital data transmission that overlays existing analog cellular network and provides packet data services needed for mobile computing . MOBILE COMPUTING APPLICATIONS : MOBILE COMPUTING APPLICATIONS Tracking and dispatching Online transaction processing Healthcare Travelling professionals Members of work groups Slide 28: ADVANTAGES DISADVANTAGES Improved decision making Increased productivity Improved customer relations Transmission interferences Potential health hazards Slide 29: At last we can say that today, in all fields like buss ion ,medical , engineering travelling professions mobile computing is too beneficial for people near and far , with the advancement of internet technologies it is too beneficial for the people related to all fields. Slide 30: ANY QUESTION???? You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
mobile computing meetujain Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 5449 Category: Education License: All Rights Reserved Like it (19) Dislike it (0) Added: April 11, 2010 This Presentation is Public Favorites: 16 Presentation Description plz gv me ur id's toooo Comments Posting comment... By: priyangar10 (8 month(s) ago) i want this presentation. please mail me sir priyangar10@gmail.com Saving..... Post Reply Close By: keerthir (4 month(s) ago) if any one gets this presentation,can u plz mail to keerukeerthi3@gmail.com Saving..... Edit Comment Close By: navgill17 (8 month(s) ago) please mail me on navgill17@yahoo.com Saving..... 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See all Premium member Presentation Transcript Slide 1: Miss Gurvinder kaur CONTENT : : CONTENT : Introduction of mobile computing Goals of mobile computing Example of mobile computing Framework of mobile computing Wireless delivery technology and switching methods Mobile info access devices Mobile data internetworking standards Cellular data communication protocols Application of mobile computing Advantages and disadvantages of mobile computing Conclusion Introduction of : Introduction of DEFINITION : DEFINITION Mobile computing means different things to different people . The key feature of mobile computing environment is that the user need . It is important for persons who travel away from their primary workplace. GOAL : GOAL The main goal of mobile computing is to work toward true computing freedom from anywhere , anytime and operate as if they were sitting in the “HOME” or “OFFICE” EXAMPLE : EXAMPLE Business professionals are working on a project with colleagues . A short time after making some crucial edits to the new product design , they plugs in the pc , hits a few keys and sends the version. Slide 7: MOBILE USERS WILL BE CONSUMERS AS WELL AS PRODUCERS OF DATA. THE EMPLOYEE IN THE FIELD COULD BE INITAING PRODUCTION ACTIVITY BY TAKING ORDERS AND PERFORMING ORDER ENTRY ROLE. Slide 8: MOBILE COMPUTING FRAMEWORK WIRELESSDELIVERY TECHLONOGY AND SWITCHING METHODS MOBILE INFO ACCESS DEVICES MOBILE DATA INTERNETWORKING STANDARDS AND EQUIPMENTS MOBILE COMPUTING BASED BUSINESS APPLICATION WIRELESS DELIVERY TECHNOLGY AND SWITCHING METHODS : WIRELESS DELIVERY TECHNOLGY AND SWITCHING METHODS METHODS Radio based Light based Land based Satellite based RADIO BASED COMMUNICATION : RADIO BASED COMMUNICATION Radio frequency signals that travel over frequencies from 100khz to 20 GHz. Slide 11: TYPES OF RF COMMUNICATIONS One -way Two-way local Covers 10 miles Covers 6 miles Covers quarter miles THE AVERAGE RANGE FOR LOCAL AREA RF EQUIPMENT IS FROM 30 FEET TO 100 YARDS LAND BASED RADIO SYSTEMS : LAND BASED RADIO SYSTEMS These systems send and receive data using low power transmitters and receivers. Private packet network. Circuit switched cellular services. Wireless WAN including spread spectrum. CELLULAR COMMUNICATION : CELLULAR COMMUNICATION Today ,the industry is moving simultaneously in three directions. 1. INCREASING CAPABILITY AND WIDE SPREAD COVERAGE FOR CORDLESS TELEPHONES : Cellular technology is evolving toward taller base station antennas and larger cells to provide economical coverage of populated areas. 2. DECREASING CELL SIZE AND POWER LEVELS FOR HAND HELD AND VEHICULAR CELLULAR RADIO: Antennas within buildings to provide higher overall capacity and to provide better coverage to the lower power cellular pocket phones that are now in increasingly wide spread usage. SPECIALIZED WIRELESS DATA SYSTEMS : SPECIALIZED WIRELESS DATA SYSTEMS These data oriented wireless systems are also emerging through cellular packet data systems and smaller area coverage. WORKING OF A CELL In the cellular systems, the areas of coverage are divided into hexagonal cells that overlap at the outer boundaries . communication takes place through a grid of transmitters and receivers each one called cell. The average cell is 2-10 miles across with actual size depending on the number of users in the cell. FREQUENCIES ARE DIVIDED INTO CELL BANDS WITH BUFFER ZONE TO PREVENT JAMMING OF NEIGHBOURING CELLS FREQUENCIES. Slide 15: Mobile telephone switching office (MTSO) Overlap coverage Receiver\ transmitter Other MTSO’S Other MTSO’S Cell structure with radio transceivers HAND OFF PROCES as a cellular device such as portable phone ,moves from one spot to another the signal may drop off momentarily due to movement from the area covered by one cell into the area covered by different cell. : HAND OFF PROCES as a cellular device such as portable phone ,moves from one spot to another the signal may drop off momentarily due to movement from the area covered by one cell into the area covered by different cell. A B BS1 BS2 Slide 17: Handset Handset ok Go ahead ok Use channel 3 Outgoing call message Call on channel 4 I am here Unit 6 where Are you transceiver Outgoing and incoming call handshake between transceiver and handset Slide 18: Log-on :Each cellular handset is assigned a unique identity or numeric arrangement module (NAM). Monitoring: Once the handset is powered on monitors the control channels to get information on local paging channels. Incoming calls: When an incoming call is received by mobile telephone switching office (MTSO),it sends a signal to all the cells in that traffic area. Outgoing calls: To make a call the user enters the telephone number and transmit it to the MTSO by an available access channel. WIRELESS PACKET DATA NETWORK : WIRELESS PACKET DATA NETWORK Most wireless data schemes use “packet” techniques for transferring data .packet radio is a communications method that transmits packets of data over a network via signals. WORKING : WORKING A special transceiver known as RF modem breaks down data into 128 byte pieces or packets. It then transmit a stream of these packets into the air. Each packet is numbered, so that message can be reassembled at the receiving end. If a packet is not received in good condition the receiving service automatically asks the sending modem to resend the missing receive other packets. SATELLITE NETWORKS : SATELLITE NETWORKS satellite network allow global communication and serve thousands of locations all over the world. Satellite networks are useful in any situation where data need to be dispersed to or gathered from many remote nodes where end to end delay is not a primary concern. INFRARED OR LIGHT-BASED MOBILE COMPUTING : INFRARED OR LIGHT-BASED MOBILE COMPUTING Infrared works by sending pulses of light emitting diode to a photo sensor that decodes the signals . Infrared devices like TV remote controls which can only send signals , computing device both sending and receiving infrared signals. MOBILE INFORMATION ACESS DEVICES : MOBILE INFORMATION ACESS DEVICES portable computers Hybrid pen computers Personal digital assistant Palmtops Cellular modems and PCMCIA MOBILE DATA INTERNETWOKING STANDARDS : MOBILE DATA INTERNETWOKING STANDARDS CODE DIVISION MULTIPLEACCESS: it has been used in military satellite systems for decades because it is secure. CDMA is a wide band “spreads “ multiple conversions across a wide segment of the cellular broadcast spectrum. TIME DIVISION MULTIPLE ACCESS : TIME DIVISION MULTIPLE ACCESS TDMA is the first digital system standardized in north America. It squeezes three calls onto a single 30 KHz transmission channel . calls are given separate time slots on a frequency , layered in between other signals and transported from cell site to cell site. CELLULLAR DATA COMMUNICATIONS PROTOCOLS : CELLULLAR DATA COMMUNICATIONS PROTOCOLS CIRCUIT SWITCHED CELLULAR TRANSMISSION: In wireless cellular communication a cell phone is connected to a cellular modem ,which in turn is linked to a mobile unit via a data terminal equipment cable. CELLULAR DIGITAL PACKET DATA: Cellular digital packet is a digital data transmission that overlays existing analog cellular network and provides packet data services needed for mobile computing . MOBILE COMPUTING APPLICATIONS : MOBILE COMPUTING APPLICATIONS Tracking and dispatching Online transaction processing Healthcare Travelling professionals Members of work groups Slide 28: ADVANTAGES DISADVANTAGES Improved decision making Increased productivity Improved customer relations Transmission interferences Potential health hazards Slide 29: At last we can say that today, in all fields like buss ion ,medical , engineering travelling professions mobile computing is too beneficial for people near and far , with the advancement of internet technologies it is too beneficial for the people related to all fields. Slide 30: ANY QUESTION????