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  • Examples of effectiveness of mobile computing
    • Rent a car check in at the curb
    • Real time Bus schedules for students
    • Push button access to nurse practitioners
  • in future any micro-processor will have a wireless access

Wireless

  • WiFi 802.11a, b, g, n (reliability, performance, security, ubiquity (starting to appear on airlines)
  • 802.11n throughput increase 8 times per radio, WiFi connect rates increase nearly 6 times
  • Reliability vs wired
    • RF obstacles like walls, heavy channel utilization, poor RF network design, bad client drivers, difficulty of management
    • WiFi relies on shared access RF medium in unlicensed spactra prone to interference.
    • Requires multiprong approach resilient architecture with no single point of failure, mesh support, power adjustments and automatic channel changing to cover gaps if AP goes offline, automatic backup cellphone link
  • Mesh networks of clients discover each other, connect securely (WiFi Direct standard) in ad hoc networks. As long as carriers allow it, they will also be able to serve as hubs for small local networks, linking several devices via Wi-Fi and letting them share the phone's 3G or 4G Internet connection.
  • 802.16m will be significantly faster than its predecessor. WiMAX Forum Vice President Mohammad Shakouri has said the goal is for the new WiMAX standard to deliver average downlink speeds of more than 100Mbps to users. In contrast, Sprint's initial Xohm WiMAX offering, which debuted commercially in 2008, delivered downlink speeds ranging between 3.7M to 5Mbps. But while 802.16m will give WiMAX a major speed boost, don't expect it to propagate any further than the current WiMAX technology that covers around 31 square miles per access point.

Integration with phones

The number of phones shipped with Wi-Fi jumped to 139.3 million in 2009, up from 92.5 million in 2008, ABI's research indicates that annual shipping number will surpass 500 million units by 2014, when 90 percent of all smartphones will have the technology. At least one phone with 11n – Samsung's Wave – has been announced. An 11n network is also more efficient, so the phone will expend less energy communicating http://www.networkworld.com/news/2010/032310-wi-fi-spreading-fast-among.html

Cell phones

  • History (see http://electronics.howstuffworks.com/cell-phone4.htm)
    • 2G, 3G (GSM, CDMA), WiMAX, LTE,
  • How cell phones work (see presentation)
    • Towers: cost $120-500K, 9mos to 3 years (incl permits & construction), 80’-400’, 20 people
    • Sectors, frequencies (why low is good: potentially 2-3 times more cell towers for same coverage), channels, initial connection, hand-offs, tower radius <=10m in flat areas, often want less (e.g. by reducing power) in cities.
  • Importance, growth
    • Mobile telecommunications connections worldwide reached five billion in the first week of July on growth in India and China, and could triple by 2016, PRTM Management Consultants said. Revenue will “probably grow 20 percent to 30 percent in the same time,” Ameet Shah, a consultant for PRTM, said from London in a telephone interview. The current revenue figure is about US$900 billion, according to researcher The Mobile World.
      Operators must change their operating models and may need to merge to survive, Shah said. Instead of concentrating on “high value, high price and low volume” they must focus on “immense scale, low value and low prices,” he said. Some markets have grown to 150%-200% penetration relative to their populations. More penetration than Internet.
    • Contracts vs PAYG, unlimited data vs usage based (e.g. $15 for 250MB vs $30 unlimited), tethering, limit some services to WiFi
      H3. SmartPhones (see http://en.wikipedia.org/wiki/Smartphone),
  • 10% of camera phones in 2008, 58% of US had mobile with Web connectivity May 2009, 58% of online consumers currently own a mobile phone capable of connecting to the Web. Of the online consumers with Web-enabled phones, 21% own a smartphone, 8% own an iPhone(TM), and 29% own another type of Web-enabled phone. 42% of PriceGrabber survey respondents said they own a non-Web-enabled phone capable of using voice and text service plans only. iPhone, released on June 29, 2007, jump-started mainstream smartphone adoption, with 75% more online consumers purchasing their first Web-enabled phone in 2007 compared with 2006. Despite the economic climate, 8% of online consumers purchased their first Web-enabled phone in Q1 2009. iPhone holds 28% of smartphone market, Android 9%, RIM 35% (Palm OS 4%, Linux 3%, Symbian 2% (source: the Nielsen Company, see http://blog.nielsen.com/nielsenwire/online_mobile/iphone-vs-android/)
    10% of online consumers said they purchase online from their mobile device, 16% compare prices and another 16% research product details/specifications. Of the online consumers making purchases from their mobile phones, 58% have purchased digital content for their phone, 51% have purchased consumer electronics, 37% have purchased computers, 36% have purchased books, and 31% have purchased clothing. Smartphone and iPhone owners are comfortable using the mobile Internet to make purchases. 56% of Apple iPhone owners and 28% of smartphone owners already are comparing prices online with their mobile phones. Additionally, 27% of iPhone owners and 35% of smartphone owners anticipate that they will be comparing prices within two years. http://www.itfacts.biz/58-of-americans-have-a-mobile-phone-with-web-connectivity/12965 (http://www.itfacts.biz/58-of-americans-have-a-mobile-phone-with-web-connectivity/12965),
  • Smartphone processor chips contain: cpu (<1/4 chip), power saving, analog ccts, video DACs. Putting all on one chips saves space, faster access. iPhone 3GS 2009 ran on ARM Cortex A8clocked at 600MHz Apple A4 runs at 1GHz. In future teripheral functions such as GPS and cellular tower communication are candidates for integration into the chip.
  • 174M (Bijal Patel telecommunications@vgtelecoms.com) Smartphone shipments in 2009, Facebook users send 1B IMs/day (passed 500M users logging on in one per month in July 2010, Facebook alone accounting for 50% of the UK's entire mobile Internet traffic), mobile market growing to €417 billion in 2010. Strongest growth in VoIP, in 2010 mobile phone users will download 6B applications to their mobile phones, currently (2010) there are 4Billion mobile subscribers 6B by 2013, smartphones outsell PCs by 2011 and will be 50% of the handset market by end of 2013. Strongest market growth in the BRIC countries. In 2010 Chinese telecom market grows by 8% to €126 billion and the Indian market will grow by a staggering 15% to €40.5 billion. Mobile Device management market expected to grow to $9B by 2015.
  • Smartphone sales will surpass worldwide PC sales by the end of 2011, RBC says. Global mobile phone sales totalled 286.1 mln units in Q2 2009, a 6.1% decrease from Q2 2008, according to Gartner. However, smartphone sales surpassed 40 mln units, a 27% increase from Q2 2007, representing the fastest-growing segment of the mobile-devices market. http://www.pcworld.com/article/171380/
  • Increasing use of mobile browsing web, social networking, mobile banking, email, multimedia players, messaging services
  • May overload network, e.g. downloading videos, video iPhone (2 min 720p video is 47MB with 1Mbps uload takes 6.2 mins). Providers such as AT&T putting in limits on amount of data transmitted e.g. 200MBcost $15/month, 2GB costs $25/month, 65% users use < 200MB/month, 98% use < 2GB/month, and only WiFi for video chat
  • Security: today’s high end smartphones are 1GHz or higher, have up to 32GB store, and with 4G will have 3Gbps connection speeds. Expect to see a growth in malware and spyware. IT departments not ready to support the new OS’, yet smart phones may have access to sensitive corporate data and can get lost (need remote wipe (Blackberry and iPhone but not Android), need encryption for private data being sent on web (e.g. SSL, VPN), SMS being used for money transfer in Indonesia in small amounts $0.45-$0.90, infect phones with Trojan-SMS.Python.Flocker (exercise caution when browsing Internet to avoid contamination by mistakenly downloading Trojan)
  • YouTube 30-50% of actual Mobile traffic, video is 50% of mobile traffic see http://www.networkworld.com/community/blog/most-exciting-iphone-4-features-will-be-marre?source=NWWNLE_nlt_daily_am_2010-06-08
  • Handsets evolving, adding email, larger screens, touch screens, qwerty keyboards, integrating cameras, line between smartphone and mobile phone is merging
  • Emerging nations will move towards mobiles rather than more fixed lines
  • 247B emails/day, 1.4 unique email users worldwide, enormous market for mobile email
  • Major players: Blackberry (RIM), Nokia, Ericsson, Palm, Android (Google), iPhone (Apple), Microsoft
  • US providers
    • OS’: Symbian (open source, Feb 2010) , Windows, Android (Google built on Linux, open source and Open handset alliance – Intel, HTC, ARM, Motorola, eBay etc., version 2.2 supports Flash, Microsoft Exchange friendly), Palm WebOS (Linux), iPhone OS (BSD/NextStep)
    • Mobile phone, SMS, WiFi, Apps stores, touch screens, color displays, sync with computer
    • Internet apps (web, weather, YouTube, email, calendar, maps), camera, video, clock, calculator, phone, GPS, MP3 player, gyroscope in new iPhone (great for Wii type games), Mobile payment:
      • Apps stores: Apple (by April 2010 hosted > 185K apps, 3Billion downloads early Jan 2010), RIM, Nokia (Ovi launched May 2009), Palm (June 2009), Microsoft (October 2009 launch), Google
    • Delay Tolerant networking & Smartphones (ByteWalla),
      • Space Communicatons Protocol Specifications set of extensions to existing protocols (e.g. TCP, security (IPsec), FT == TCP)) developed by the Consultative Committee for Data Space Systems (CCSCS) to improve performance of Internet protocols in space environment
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