Environmental Design for Pervasive Computing Systems Ravi Jain
- Slides: 35
Environmental Design for Pervasive Computing Systems Ravi Jain John R. Wullert II Autonomous Comm. Lab Do. Co. Mo USA Labs Applied Research Telcordia Technologies jain@docomolabs-usa. com jwullert@telcordia. com Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved.
Outline • Do. Co. Mo USA Labs • • • Motivation and background Using less Using it longer Smart disposal Conclusions Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 2
Summary • Do. Co. Mo USA Labs is doing exciting research on 4 G wireless services, architectures, and networks • Pervasive computing offers tremendous opportunities but also possible negative environmental impacts • We need to treat environmental impact as a first-class design constraint • Increasingly software is a key to reducing environmental impact • We need research in many areas of system design for pervasive computing and communications Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 3
NTT Do. Co. Mo • Parent: NTT Corp (inc. 1952) • History – 1979: NTT offered a car-phone service • 21 units in Tokyo metro, $3 K monthly charge, $10 K security deposit – 1992: Do. Co. Mo spun out • 0. 5 M cellphone subscribers, 8 M pager subscribers – 1999: Do. Co. Mo launched i-mode data service – 2001: Do. Co. Mo launched W-CDMA (FOMA), world’s first 3 G service Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 4
NTT Do. Co. Mo Market Trends Source: NTT Do. Co. Mo website: http: //www. nttdocomo. com, Feb. 2003 Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 5
3 G (FOMA) Application Plan New servi ce d ep l o ymen t International roaming M-stage visual on FOMA M-stage music on FOMA Image-clipping with i-mode TV Phone Mobile EC Music Delivery i-motion i-mode Video Delivery Location information Visual mail Possible to use FOMA and 2 G phones with a single phone number Send images instantly as mail Dual network service Han d set en h an cemen t PDA type Upon service launch 2 G/3 G dual phone Smaller, lighter handsets with longer battery time Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 6
Do. Co. Mo’s R&D Centers Do. Co. Mo EUROPE 1998. Aug YRP 1998. Mar Do. Co. Mo USA LAB Do. Co. Mo EURO LAB 1999. Nov 2000. Nov Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 7
Do. Co. Mo USA Labs • About 45 employees, 35 researchers • CEO: Dr Minoru Etoh • Charter: Research on future 4 G architectures, services and networks • Since 1999 – IPR: Numerous patents filed and papers published – Substantial presence on standards bodies • IETF: Chairs of 3 IETF working groups, Seat on ISOC and IAB • 3 GPP 2, IEEE 802. XX, etc – Research presence: • Area editors of journals and magazines, Conference TPC memberships and chairs, etc – Collaborations: Several universities, companies and consortia Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 8
Do. Co. Mo USA Labs: Research Themes (1 of 2) • Seamless services over heterogeneous access networks and devices – Ubiquitous services and their control – Browser session mobility, service discovery, context awareness – Seamless AAA • Mobile middleware, platforms and handsets – Content Distribution Networks (CDN): Qo. S, security and APIs – Mobile servlets, lightweight security, disconnected operation • IP-based network architectures and protocols – Fast Mobile IP handoffs and micro-mobility protocols – Location estimation, prediction and privacy – Qo. S estimation, control and applications Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 9
Do. Co. Mo USA Labs: Research Themes (2 of 2) • Multi-hop, ad-hoc and hotspot radio networks – Signaling, Qo. S, cost and capacity – Cross-layer adaptation and WLAN • Security and cryptography – ID and Certificate-based encryption, anonymous credentials, micro-payment schemes and e-commerce • Advanced speech, audio and video coding – Unified speech and audio coder, Mobile 3 D audio and hi-fi video telephony We welcome meaningful research collaborations and partnerships Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 10
And now to shift gears … The Feature Presentation Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 11
Outline: Environmental Design for Pervasive Computing Systems • Do. Co. Mo USA Labs • • • Motivation and background Using less Using it longer Smart disposal Conclusions Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 12
Recycling Council of Ontario Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 13
Frequently Raised Objections (FRO) • Just throw all the old PCs and cellphones into the sea – Ahem … • This is a naïve and ambitious plot to overthrow the capitalist system – No … we are just promoting environmentally sustainable design – Environmental responsibility has been embraced by many major corporations and governments • This is not really a big problem – We hope to show data that indicates otherwise • This is not my problem … why would I (or anyone) pay for this? – Legislation and consumer pressure is building – Market-leader advantages • This is not a computer science problem – We believe software, not hardware or materials, is increasingly important • This is not a research problem – We believe environmental factors can affect all layers of system design – Analogy with battery power considerations in mobile computing Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 14
Computer waste (so far …) • • • Estimate: Over 75% of all computers ever bought in the US are stored in people’s attics, basements, garage … (MCC, 1996) The growth of electrical/electronic waste is 3 times the growth of other municipal waste (AEA, 1997) Estimate: By 2004 there will be over 315 million obsolete computers in the US alone (NSC, 1999) – 4 billion pounds of plastics waste alone • Toxic materials in PCs (MCC, 1996) – – – Lead, Mercury, Cadmium, Arsenic, Chromium Polyvinyl Chloride (PVC) Polybrominated Diphenylethers (PBDE) … “New personal computers release over 100 different chemical compounds as gases, adversely affecting the health and performance of office workers”, • • Technical Univ. of Denmark study, Environment Daily, 9 Sep 2002 Accounts for a significant proportion of U. S. energy consumption – ~3% of residential use, 5 -10% of commercial use, and growing fast (Rosen & Meier, 2000; EPA, 2003) Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 15
This is just the beginning Source: Rainer Malaka, EML ICDE 2001 Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 16
Pervasive Computing • Most pervasive computing devices consume less material than traditional PCs • However pervasive computing devices: – Will be far more numerous • Example: 13 M Bluetooth devices shipped in 2001; Expect 780 M by 2005 (Cahners In-stat) … compare with black phones – Rapid replacement due to low cost or immature technology – Can be disposable • Example: disposable cell phones (Telespree, Hop. On) – Will be embedded in other products • Jewelry, clothing, smart floors, sensor networks, … • Makes location, extraction, collection, recycling harder – More likely to be lost, forgotten, or simply abandoned – Use batteries, likely exclusively – Will bring computer environmental impacts to regions where none exist at present Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 17
A Challenge • Reduce total-lifecycle per capita computer & communications environmental impacts – Material and energy consumption by 10 x – Non-recycled material and non-renewed energy consumption by 100 x – Toxic and harmful byproducts by 1000 x Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 18
Design motivations • Not “The sky is falling …”, but pervasive computing does pose a new environmental risk • Design for the environment – Reduction of resource consumption – Reuse of resources and products – Recycling * Needs to be an integral part of the design process, not an afterthought * Recycling is important, but is not the answer * Software is increasingly important • We have an opportunity to do this while still at the start of the technology wave • Legislative and consumer pressure – Extended Producer Responsibility (EPR) in Europe • First-mover advantage (e. g. NEC Eco PC) – Many “socially responsible” advances are first resisted (e. g. Cellular 911) – Foresight sees market opportunities and differentiators Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 19
One Example: NEC Eco PC • • Oct. 2002: NEC Powermate Eco receives PC Magazine award for technical excellence in desktop PC category Editors cite: – The only desktop PC that doesn’t use a fan • Uses less energy, is quieter – The first to address PC recycling • • • Motherboard uses lead-free solder Chassis is made with 100% recyclable plastic Chassis plastic uses non-toxic flame retardant • The largest opinion expressed by visitors at the NEC Internet Environmental Forum is “Like NEC because of its positive stance” • NEC President K. Nishigaki: “We are coming to a stage where, if a product is not environmentally sound, consumers will not buy it”. Source: NEC 2002 Annual Environmental Report, http: //www. nec. co. jp/eco/en/annual 2002/ Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 20
Using less: Minimizing physical materials • Minimizing physical materials – Doing more with less, not Doing with less • Two parallel trends – Integration: cell phone as pager, organizer, e-wallet, radio, media player etc. . . – Specialization: different functionality, form factors, power requirements, connectivity, processing and storage, fashion niches • Reducing physical materials within a single device – Modular design should allow configuration on a per-user basis – Similar to PC configuration options but with smaller option units • Device sharing – Example: Environmental impacts of answering machines ~10 x more than centralized voicemail (Taiariol, 2001) – But voicemail still lacks features (e. g. live screening) and a good UI Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 21
Using less: Device sharing on a larger scale • 150 M hosts connected to the Internet, mostly underutilized – Have been harnessed for tasks that would be impossible otherwise • Mersenne Prime Search (GIMPS): 130 K users, 1. 5 TFlops • 213466917 -1 (4 M digits), Michael Cameron (Age 20), Canada, 800 MHz PC • Two key challenges (Anderson & Kubiatowicz, 2001) – Internet Scale Operating System (ISOS) for resource allocation, security … – Economic models to provide private owners with incentives • Additional challenge: take environmental concerns into account – Energy: Preferentially utilize computers in cold regions, or those that are not in dormant mode, or depending on available cycles – Materials: Utilize CPU and storage that would otherwise be wasted • Sharing in enterprise and wireless networks – Pervasive computing environment in user’s home, office, car – More device & network heterogeneity, limited resources, restricted UI Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 22
Using less: Minimizing energy usage • Formal models of energy consumption (Big-oh joules) – Needed to motivate algorithm improvements – Analogy to formal models of disk I/O • Energy-efficient applications and architectures – Example: Half-duplex multiparty calls (“Push-to-talk”) use 50% less power than voice calls • Most 2 G/3 G systems do not support this feature • Need to consider total-lifecycle energy impacts – Cellphone consumes ~6 k. J/day. Charger: ~110 k. J/day (Nicolaescu, 2001) – Do. Co. Mo cut total consumption from 115 k. J/day (1992) to 3 k. J/day (2002) – Nearly 90% of energy usage in cordless phones and answering machines is in standby mode (U. S. Do. E, 2002) – Consider energy consumed in manufacture, distribution, and disposal • Alternative energy sources – Solar energy – Human energy: wrist movement (Citizen eco-drive watch), footfalls can generate 50 m. W (Paradiso, 2000), keystrokes Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 23
Using it longer Programmability • Software Sprawl – SLOC = 13992 e 0. 74 yrs R 2 = 0. 98 SLOC = Lines excluding comments and blank lines Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 24
Using it longer Programmability • Software Sprawl Again Office Productivity Suite Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 25
Using it longer Programmability • Most users do not need all the features of the program (or even know they exist) at any one time • Need mechanisms to – – discover system capabilities discover applications and components auto-configure software secure, just-in-time, just-right plug-in upgrades • Hardware requirements should be written not only for entire applications, but based on user-level features • Automated testing techniques need to be developed that support modular hardware • Similar considerations apply to data sprawl Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 26
Using it longer: Extending storage space • Estimate: 30 -60% of disk space on a computer is wasted (Lyman & Varian, 2000) – Example: Multiple revisions of the same document, or outdated software • This Data Sprawl also costs energy (for search and retrieval) and creates usability issues • Need self-managing and self-destroying data • Need better knowledge management support, duplicate prevention, on-line or automatic compression. Examples: – Few word processors offer journaling to store and locate most recent version – Duplicate deletion needs to be done for user’s entire pervasive environment – E-mail attachments are copied to multiple mailboxes instead of being automatically stored in a location and the URL being sent • “Storage is cheap” hides the environmental (and usability) costs of obsolete or useless data Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 27
Using it longer Just-right hardware upgrades • Design hardware and software to support hardware upgrades • Possible example • The OS for PC Y can treat multiple heterogeneous CPUs and disks as single logical units • Upgraded PC cost = 10% for CPU, 10% for disk, and 5% for memory • Techniques for doing this to a user’s pervasive computing devices are required Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 28
Smart disposal • Recent increase in recycling PCs – Manufacturer take-back legislation in US • Cellphone recycling in Japan (Belson, 2002) – Gold: 24 micrograms/phone. Total metal extracted: 21 cents/phone • Crushing devices into their raw materials loses the vast majority of their value • In addition, there are significant health and safety risks of recycling itself … Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 29
This is not a problem … Source: USA Today 2/25/02 Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 30
• Recycling should focus on – Identifying subassemblies and larger blocks for reuse • RF ID tags – “Upcycling” or remanufacturing into new products • Close the loop of product information Information Associated with Product Smart disposal – Provide quantitative Remanufacture feedback to designers on Resale actual use, upgrade and Production Retail Consumer failure of software and Disposal hardware Thomas, 2001 Product Lifecycle Stage Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 31
A process response: ISO 14000 • Standards & guidelines issued in 1996 for environmental management – – • Determining the environmental impact of an organization’s activities Establishing goals and targets for those impacts Evaluating how well the goals and targets are being achieved Continuously improving performance 2001: Over 20 K certified organizations in 98 countries – Certification requires formal assessment by a neutral third party • Does not provide specific targets or methods to achieve them – Processes, not products • Not a guarantee of improved environmental performance, but – A means of demonstrating voluntary corporate commitment – A set of formal methods towards achieving goals – Canadian survey (1999): almost all certified organizations found ISO 14000 beneficial. Improvements cited: environmental performance, cost reduction and competitive advantage • A Proposal: Need to consider the effects of software and hardware/software codesign in ISO 14000 targets Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 32
Summary • Environmental impacts need to be treated as a first-class design constraint • If applied consistently, they will have impacts at all levels of software and systems design … a major challenge to integrate total -lifecycle costs into all design aspects • Lower layers – – • – – – • Seamless integration of old and new hardware and just-right upgrades Environmental parameters to an Internet Scale OS Pervasive OS with environmental design Minimize OS and software sprawl – – • – Reduced requirements Intelligent hardware diagnostics and workarounds Present surviving resources to apps – – • • • Minimize data sprawl with better knowledge management, duplicate avoidance, retrieval, and automatic compression Discover system capabilities, software component discovery and composition, secure, just-in-time plug in Compiler and automated testing techniques Applications and UI – – Low-cost fault-tolerance techniques – – Applications support – Hardware requirements specification based on user-level features Modularly upgradeable hardware Identify subassemblies for recycling Software radios to adapt to new protocols and air interfaces OS and system software – • Just-right software upgrades Energy-efficient applications and architectures Improve UI for device sharing Make energy and toxic byproducts visible to users: • Energy. Star -> Non. Toxic. Star Formal models of energy consumption New design and modeling methodologies Use of alternative energy (human, solar) Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 33
Barriers • “A threat to growth / capitalism / our way of life” – Sustainable and environmentally responsible design is the best way to promote long-term growth – Carrots (economic incentives, secondary markets, broker opportunities) are better than sticks (legislation, consumer disaffection) • No immediate short-term benefits – But see NEC Eco PC, Electric cars, etc • Few professional incentives for R&D in this area – National or international R&D funding programs are needed – No workshops, journals or “tenure-friendly” forums and outlets • Research area is difficult: – need multidisciplinary approach (e. g. air bags) – need precise problem formulations – no established benchmarks Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 34
Summary • Do. Co. Mo USA Labs is doing exciting research on 4 G wireless services, architectures, and networks • Pervasive computing offers exciting opportunities but also possible negative environmental impacts • We need to treat environmental impact as a first-class design constraint • Increasingly software is a key to reducing environmental impact • We need research in many areas of system design for pervasive computing and communications Copyright © 2003 Do. Co. Mo Communications Laboratories USA, Inc. All Rights Reserved. 12/19/2021 Ravi Jain 35
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