1 / 22

Mobile Applications

Mobile Applications Justin Champion Room C208 - Tel: 3273 www.staffs.ac.uk/personal/engineering_and_technology/jjc1 MCCS – New Technology Contents Operators offering value added services Changing use of mobile devices Device Technology Mobile Applications MCCS – New Technology

Télécharger la présentation

Mobile Applications

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.


Presentation Transcript

  1. Mobile Applications Justin Champion Room C208 - Tel: 3273 www.staffs.ac.uk/personal/engineering_and_technology/jjc1

  2. MCCS – New Technology • Contents • Operators offering value added services • Changing use of mobile devices • Device Technology • Mobile Applications

  3. MCCS – New Technology • Operators recognised that data services could make them money • 02 worldwide got 17.3% of there income from data transfer (www.mmo2.com/docs/media/financial_performance_preliminary3.html, 2003) • Mostly from SMS usage, but this will change • E-commerce is the most likely reason for a change • Using a phone like a credit card • Possibly e-voting • (news.bbc.co.uk/1/hi/uk_politics/3300425.stm, 2003) • Elections could be help more regularly if it was cheaper and easier to hold them • To increase this the devices will have to become more capable

  4. MCCS – New Technology • Changes will need to take place in • Displays • Processing • Operating Systems • Ability to receive data at the correct rate

  5. MCCS – New Technology • Displays • The ultimate aim is to provide the information in a clear manner with the minimum of battery usage • With the increased use of photo quality images a full palette of colours must be capable of being displayed • The resolution must be suitable for close proximity usage • Most devices will be held in the hand when being used • A number of technologies have emerged as potential solutions

  6. MCCS – New Technology • Displays Continued • Liquid Crystal Displays • Passive Matrix • Active Matrix Thin Film Transistor (TFT) • These displays are capable • Using low power • Displaying at least 64,000 colours • Refreshing at a rate for 15 frames a sec with MPEG • 25 is the standard frame rate • Future general public (In research use now) • ThinCRT • Light Emitting Polymers • Plastics which produce light when an electrical charge is put into them • Phillips should have released a version now! • Cambridge are carrying out research on this • (http://www.cdtltd.co.uk/, 2004)

  7. MCCS – New Technology • Device Capabilities • Technology is moving away from a device that contains all that it needs to work • Now the user has a base set of functionality anything additional can then be transferred into the device • This allows the customisation of the device with only that which is required. • The first step to this is to create an Operating System (OS) that supports add-ons. • Each device will only have the functionality that it requires and this can change over time • A potential “All in one device” PDA, Phone, Fax machine, games, web surfing, etc. • These are here now and will be demonstrated during this course

  8. MCCS – New Technology • Operating System • Modular design to allow faster development times • Each layer can only communicate with the layer next to it User J2ME Program C++ Program Java Virtual Machine Operating System Device Hardware

  9. MCCS – New Technology • Current Device OS’s • Symbian, (PSION) • Open source anyone can develop for them • At this time Symbian is the market leader with new 2.5/3G phones • Supported by Nokia and other major manufacturers • (http://www.canalys.com/pr/r2004011.htm, 2004) • Palm OS (PSION) • Windows Smartphone (Microsoft) • Windows Mobile 2003 (Microsoft) • Controlled developments by Microsoft • Other contenders for future consideration • Linux (Red Hat) • Openwave • Savaje • Future • Although devices are hoping to share a single transmission medium the development for these devices will be more problematic • There will be no single defining OS for devices

  10. MCCS – New Technology • Current Device OS’s • Developing application can take place in • C++ • Most manufacturers provide the SDK’s to allow this • Issues around the application working on more than one device though • Java 2 Micro Edition (J2ME) • All of the current OS’s support this language • In theory a program written once can run on all devices • Reality might be slightly different • Microsoft .NET • Only works on the Microsoft based devices • These are limited at the moment • A question could be • How long before someone develops a virus for a 3G phone ?

  11. MCCS – New Technology • Battery Life • The more the processor does and the better the graphics on the display the more battery power this takes • A fine line needs to be agreed between quality and battery • It is no use having 16 million colours if the battery lasts only a few hours • The increased functionality will mean an increase in processor & memory use • You can no longer put everything that you want to do in hardware, which is more power efficient • Early 3G experiments in Japan gave the devices a 1 hour battery life (http://www.iapplianceweb.com/story/OEG20021026S0017, 2003) • Battery size and weight • The physical size of battery can not change and neither can the weight as the user expects a certain size of device

  12. MCCS – New Technology • Current Battery Technology • All battery types work in the same way the only change is the metals used to produce the electrons • Nickel-Cadmium (NiCd) • Nickel-Metal Hydride (NiMH) • Suffers from a memory effect and is not widely used now • Lithium-ion battery (LiOn) • Future Batteries • Fuel Cell • Predicted for production in industrial mobile devices by early 2004 • Instead of recharging the fuel will be replaced in the device • The fuel could be either Methanol or Hydrogen • This method will work like a rechargeable cigarette lighter

  13. MCCS – New Technology • Other battery saving techniques • All of the OS’s have built into them that the device will turn off when not used except for the transmission of phone data. • Certain parts of the device are defined as not essential and will be switched off • Processors when not fully required will slow down the clock speed to reduce the power drain • As a part of 3G standards the device have built in power controllers for transmissions • This means that as you are closer to the base station the amount of power used for your transmissions will be reduced • The benefits of this technique are more than battery related as will be discussed in a future week • We have already looked at the improving situation with the display screens which take a lot of power

  14. MCCS – New Technology • Other battery saving techniques • ARM processors released in October 2003 • Have built into them “Intelligent Energy Manager” • This works out how much processor is required for a instruction and reduces the power to the processors accordingly

  15. MCCS – New Technology • Ability to receive data at the correct rate • This will be discussed in detail in future weeks

  16. MCCS – New Technology • Applications • With the increased computing power uses need to be developed • The communications with a device are referred to as Push/Pull • Push • Information is sent unsolicited to the user • This is starting now, with Orange sending out messages • Soon junk (SPAM) text messages will become popular • Pull • Information which you specially request

  17. MCCS – New Technology • Push Services • The same as email in reality but a little more personalised • A mobile device is aware of its current location • This is a requirement in the US with the Emergency (E-911) law • The emergency services need to know to within 50 metres the location of a device • Location based services • These services have a good use, they can also be used for commercial benefits • Services can be directed to you based on where you are • “Tell me where the nearest Chinese restaurant is?” • The phone then has the capability to show you a map of your current location and the destination • This is the logical upgrade to the Yellow Page services

  18. MCCS – New Technology • Location Based continued • As you walk past a shop the latest offers can be transferred into your phone. • This would rely on a profile being setup that tells the shop that you are interested in such items • Issues need considering like personal privacy • Do you want anyone to know where you are currently located • What else will be done with this information? • Becomes a issue of the data protection act • Does a phone number stored breach the Data Protection Act ? • They have nothing personal on you if the receiving company does not store personal details against this phone number

  19. MCCS – New Technology • Pull Services • These you would register for or you physically request at the time. • The previous example of the restaurant is a pull service • Football results service is a popular current service • Future usage • In the future companies are hoping that an increased video use will increase revenues • Football highlights sent directly to your phone

  20. MCCS – New Technology • Football highlights • This will become a issue when large numbers of people start to watch these video sequences • Consider if England won the world cup how many people would pay to see the actual goal ! • An Israeli company is working on a fix for this • The build up to the goal as in the 15 seconds before would be sent as vectors • You would see the details of the goal as though it is a computer game • Just before the actual goal the action would change to real video footage to show the goal and just after • This will save massive amounts of the data on the networks • New 3G devices all have full capability to render vector based graphics in real time with the minimum of the data transferred

  21. MCCS – New Technology • Application possibility • Any application available on a PC can be done a mobile device • The number of applications is limitless • As application become more demanding the capabilities of the devices will increase • Considerations always need to be given to • Battery life • Memory capacity • Usability with the current small screens • Input into the device

  22. MCCS – New Technology • Summary • Why we need advanced devices • Available Devices • What they support • Operating Systems • Battery Saving Options • Ubiquitous Computing • Uses of the services • Push • Pull

More Related