Jump to content

Freedom of Mobile Multimedia Access: Difference between revisions

From Wikipedia, the free encyclopedia
Browse history interactively
← Previous editNext edit →
Content deleted Content added
VisualWikitext
Vegaswikian (talk | contribs)
270,510 edits
Unlinked: Battery life
→History: removing unsourced claims
(23 intermediate revisions by 16 users not shown)
Line 1: Line 1:
{{Short description|Mobile network in Japan}}
⚫
'''Freedom of Mobile Multimedia Access''' ('''FOMA''') is the [[brand name]] of the [[W-CDMA]]-based [[3G]] [[telecommunications]] services being offered by the [[Japan]]ese [[telecommunications service provider]] [[NTT DoCoMo]]. It is an implementation of the [[Universal Mobile Telecommunications System]] (UMTS) and was the world's first 3G service to commence operation.
{{Redirect|FOMA||Foma (disambiguation)}}
⚫
'''Freedom of Mobile Multimedia Access''' ('''FOMA''') is the [[brand name]] of the [[W-CDMA]]-based [[3G]] [[telecommunications]] services being offered by the Japanese [[telecommunications service provider]] [[NTT DoCoMo]]. It is an implementation of the [[Universal Mobile Telecommunications System]] (UMTS) and was the world's first 3G mobile data service to commence commercial operations.


[[File:FOMA N900iS.jpg|thumbnail|A typical FOMA phone]]
⚫
NTT DoCoMo also offers [[High Speed Packet Access|HSPA]] services branded '''FOMA High-Speed''' ('''FOMAハイスピード'''), which offers downlink speeds up to 7.2 Mbit/s and uplink speeds up to 5.7 Mbit/s.<ref>{{cite web|url=http://www.nttdocomo.co.jp/service/func_tool/high_speed/|title=FOMAハイスペード|author=NTT DoCoMo|language=Japanese|accessdate=2009-06-10}}</ref>

⚫
NTT DoCoMo also offers [[High Speed Packet Access|HSPA]] services branded '''FOMA High-Speed''' ('''FOMAハイスピード'''), which offers downlink speeds up to 7.2&nbsp;Mbit/s and uplink speeds up to 5.7&nbsp;Mbit/s.<ref>{{cite web|url=http://www.nttdocomo.co.jp/service/func_tool/high_speed/|title=FOMAハイスペード|author=NTT DoCoMo|language=ja|access-date=2009-06-10|url-status=dead|archive-url=https://web.archive.org/web/20090421060836/http://www.nttdocomo.co.jp/service/func_tool/high_speed/|archive-date=2009-04-21}}</ref>


==History==
==History==
NTT DoCoMo developed the [[W-CDMA]] [[air interface]], which is a form of [[DS-CDMA]] (Direct Sequence CDMA), in the late 1990s{{Citation needed|date=December 2009}}. It was later accepted by ITU as one of several air interfaces for [[IMT-2000]] and by ETSI as one of three air interfaces for the [[UMTS]].
The [[W-CDMA]] [[air interface]] was accepted by the [[International Telecommunication Union|ITU]] as one of several air interfaces for the [[IMT-2000]]telecom initiative and by the [[ETSI]] as one of three air interfaces for the [[UMTS]] cellular network standard.


NTT DoCoMo originally planned to launch the world's first 3G services, initially branded '''Frontier of Mobile Multimedia Access''' ('''FOMA'''), in May 2001.<ref name="3GPP memo">{{cite web |url=http://www.3gpp.org/ftp/tsg_sa/tsg_sa/TSGS_11/Docs/PDF/SP-010140.pdf |title=3GPP TSG_SA Vice-Chairman Nomination |accessdate=2009-02-12 |author=Yabusaki, Masami |date=2001-03-12}}</ref> However, by May 2001, NTT DoCoMo had postponed the full-scale launch until October 2001, claiming they had not completed testing of their entire infrastructure, and would only launch an introductory trial to 4,000 subscribers.<ref name="CaseStudy01">{{cite web |url=http://www.icmrindia.org/pdf/Business%20Strategy%20Case%20Study%20-%20DoCoMo.pdf |title=ICMR Case Collection: DoCoMo - The Japanese Wireless Telecom Leader |accessdate=2009-02-12 |author=ICFAI Center for Management Research |date=2003}} {{Dead link|date=September 2010|bot=H3llBot}}</ref> In doing so, they also renamed the service to '''Freedom of Mobile multimedia Access'''.<ref name="CaseStudy01"/> In June 2001 trial subscribers complained the [[mobile phone]]s had insufficient battery life and [[Crash (computing)|crashed]] frequently, that there was inadequate [[Coverage (telecommunication)|network coverage]], and that there were [[Information security|security]] issues within the handset itself.<ref name="CaseStudy01"/> As a result, DoCoMo [[Product recall|recalled]] 1,500 handsets by the end of June 2001. FOMA successfully launched in October 2001 providing mobile telecommunications coverage to [[Tokyo]] and [[Yokohama]].<ref name="CaseStudy01"/>
NTT DoCoMo originally planned to launch the world's first 3G services, initially branded '''Frontier of Mobile Multimedia Access''' ('''FOMA'''), in May 2001.<ref name="3GPP memo">{{cite web |url=http://www.3gpp.org/ftp/tsg_sa/tsg_sa/TSGS_11/Docs/PDF/SP-010140.pdf |title=3GPP TSG_SA Vice-Chairman Nomination |access-date=2009-02-12 |author=Yabusaki, Masami |date=2001-03-12}}</ref> However, by May 2001, NTT DoCoMo had postponed the full-scale launch until October 2001, claiming they had not completed testing of their entire infrastructure, and would only launch an introductory trial to 4,000 subscribers.<ref name="CaseStudy01">{{cite web|url=http://www.icmrindia.org/pdf/Business%20Strategy%20Case%20Study%20-%20DoCoMo.pdf |title=ICMR Case Collection: DoCoMo - The Japanese Wireless Telecom Leader |access-date=2009-02-12 |author=ICFAI Center for Management Research |date=2003 |url-status=dead |archive-url=https://web.archive.org/web/20091229110830/http://www.icmrindia.org/pdf/Business%20Strategy%20Case%20Study%20-%20DoCoMo.pdf |archive-date=December 29, 2009 }}</ref> In doing so, they also renamed the service to '''Freedom of Mobile multimedia Access'''.<ref name="CaseStudy01"/> In June 2001 trial subscribers complained the [[mobile phone]]s had insufficient battery life and [[Crash (computing)|crashed]] frequently, that there was inadequate [[Coverage (telecommunication)|network coverage]], and that there were [[Information security|security]] issues within the handset itself.<ref name="CaseStudy01"/> As a result, DoCoMo [[Product recall|recalled]] 1,500 handsets by the end of June 2001. FOMA successfully launched in October 2001, providing mobile telecommunications coverage to [[Tokyo]] and [[Yokohama]].<ref name="CaseStudy01"/>


Initially - as the first full-scale 3G service in the world<ref>[http://www.picsel.com/index.php/mediacentre/casestudy/151/ NTT Docomo Case Study], [[Picsel]]</ref> - FOMA handsets were of experimental character targeting [[Early adopter (marketing)|early adopters]], and were big, had poor battery life and the network covered the center of Japan's largest towns only. For the first 1–2 years, FOMA was essentially an experimental service for early adopters - mainly communication industry professionals.
Initially - as the first full-scale 3G service in the world<ref>{{cite web |title=NTT Docomo Case Study &#124; Picsel Technologies |url=http://www.picsel.com/index.php/mediacentre/casestudy/151/ |publisher=[[Picsel]]|archive-url=https://web.archive.org/web/20090914145652/http://www.picsel.com/index.php/mediacentre/casestudy/151 |archive-date=2009-09-14 |date=2007-11-19}}</ref> - The first FOMA handsets were of an experimental nature, targeting [[Early adopter (marketing)|early adopters]], were larger than previous handsets, had poor battery life, while the initial network only covered the center of Japan's largest towns and cities. For the first 1–2 years, FOMA was essentially an experimental service for early adopters - mainly centered around communication industry professionals.


As NTT DoCoMo did not wait for the finalisation of the 3G Release 99 specification, their network was initially incompatible with UMTS.<ref>{{cite|author=Hsiao-Hwa Chen|publisher=John Wiley and Sons|year=2007|isbn=978-0-470-02294-8|pages=105–106}}</ref> However, in 2004 NTT DoCoMo performed wide-scale upgrades on its network, bringing it into compliance with the specification and enabling 100% compatibility with UMTS handsets, including incoming and outgoing roaming.
As NTT DoCoMo did not wait for the completion and finalization of the 3G Release 99 network specification, their 3G W-CDMA network was initially incompatible with the internationally deployed UMTS standard.<ref>{{citation|author=Hsiao-Hwa Chen|publisher=John Wiley and Sons|year=2007|isbn=978-0-470-02294-8|pages=105–106}}</ref> However, in 2004 NTT DoCoMo performed wide-scale upgrades on its network, bringing it into compliance with the specification and enabling 100% compatibility with UMTS handsets, including incoming and outgoing roaming.


Around March 2004, FOMA achieved the breakthrough into mass sales, and sales soared. As of September 29, 2007, FOMA has over 40 million subscribers.<ref>{{cite web|url=http://www.nttdocomo.com/pr/2007/001367.html|title=3G FOMA Subscribers Exceed 40 Million|accessdate=2007-10-03|date=October 2, 2007|publisher=[[NTT DoCoMo]]}}</ref>
Around March 2004, the FOMA network achieved mass adoption, and handset sales soared. As of September 29, 2007, FOMA had over 40 million subscribers.<ref>{{cite web|url=http://www.nttdocomo.com/pr/2007/001367.html|title=3G FOMA Subscribers Exceed 40 Million|access-date=2007-10-03|date=October 2, 2007|publisher=[[NTT DoCoMo]]|archive-url=https://web.archive.org/web/20071003020048/http://www.nttdocomo.com/pr/2007/001367.html|archive-date=October 3, 2007|url-status=dead}}</ref>


== Terminals ==
== Terminals ==
NTT DoCoMo offers a wide range of FOMA branded terminals, which are made specifically for the Japanese market. FOMA terminals differ from Western UMTS terminals in several aspects, for example:
NTT DoCoMo offers a wide range of FOMA branded handsets, which are made specifically for the Japanese market. FOMA handsets differ from Western UMTS handsets in several aspects, for example:


* Standardised menu structure and chargers.
* A standardized menu structure and chargers.
* Japan-specific features such as [[i-mode]] or [[Osaifu-Keitai]] (electronic purse).
* Japan-specific features such as [[i-mode]] or [[Osaifu-Keitai]] (electronic wallet).
* Multiband-support, which includes band VI at 800&nbsp;MHz for FOMA Plus-Area (newer models).
* Multiband-support, which includes band VI at 800&nbsp;MHz for FOMA Plus-Area (newer models).
* No support for dual-mode operation with GSM/EDGE (except some models branded as World Wing).
* No support for dual-mode operation with GSM/EDGE (except some models branded by DoCoMo as World Wing).


== Frequency allocations ==
== Frequency allocations ==
In metropolitan areas, FOMA uses the [[UMTS frequency bands|UMTS band I]] around 2100&nbsp;MHz, which has been originally assigned to IMT-2000 services worldwide, except in the Americas.<ref name="freqalloc"/>
In metropolitan areas, FOMA uses the [[UMTS frequency bands|UMTS band I]] around 2100&nbsp;MHz, which has been originally assigned to IMT-2000 services worldwide, except in the Americas.<ref name="freqalloc"/> In order to improve coverage in rural and mountainous areas, NTT DoCoMo also offers FOMA services in the 800&nbsp;MHz band originally assigned to the 2G [[Personal Digital Cellular|PDC]] mova service, which corresponds to [[UMTS frequency bands|UMTS band VI]] and is similar to band V used in the United States.<ref name="freqalloc">{{Cite news

In order to improve coverage in rural and mountainous areas, NTT DoCoMo also offers FOMA services in the 800&nbsp;MHz band originally assigned to the 2G [[Personal Digital Cellular|PDC]] [[mova]] service, which corresponds to [[UMTS frequency bands|UMTS band VI]] and is similar to band V used in the [[United States]].<ref name="freqalloc">{{Cite news
|last=Okada
|last=Okada
|first=Takashi
|first=Takashi
|title= Mobile Terminal RF Circuit Technology for Increasing Capacity/Coverage and International Roaming
|title= Mobile Terminal RF Circuit Technology for Increasing Capacity/Coverage and International Roaming
|url=http://www.nttdocomo.co.jp/english/binary/pdf/corporate/technology/rd/technical_journal/bn/vol10_2/vol10_2_047en.pdf
|url=http://www.nttdocomo.co.jp/english/binary/pdf/corporate/technology/rd/technical_journal/bn/vol10_2/vol10_2_047en.pdf
⚫
|access-date=2009-06-10
|format=PDF
⚫
|accessdate=2009-06-10
|periodical =NTT DOCOMO Technical Journal
|periodical =NTT DOCOMO Technical Journal
|volume=10
|volume=10
Line 42: Line 43:
{{Mobile telecommunications standards}}
{{Mobile telecommunications standards}}


[[Category:Telecommunications-related introductions in 2001]]
[[Category:2001 establishments in Japan]]
[[Category:Telecommunications in Japan]]
[[Category:Telecommunications in Japan]]
[[Category:Mobile telecommunication services]]
[[Category:Mobile telecommunication services]]
[[Category:NTT Docomo]]

Revision as of 08:04, 5 September 2024

"FOMA" redirects here. For other uses, see Foma (disambiguation).

Freedom of Mobile Multimedia Access (FOMA) is the brand name of the W-CDMA-based 3G telecommunications services being offered by the Japanese telecommunications service provider NTT DoCoMo. It is an implementation of the Universal Mobile Telecommunications System (UMTS) and was the world's first 3G mobile data service to commence commercial operations.

A typical FOMA phone

NTT DoCoMo also offers HSPA services branded FOMA High-Speed (FOMAハイスピード), which offers downlink speeds up to 7.2 Mbit/s and uplink speeds up to 5.7 Mbit/s.[1]

History

The W-CDMA air interface was accepted by the ITU as one of several air interfaces for the IMT-2000telecom initiative and by the ETSI as one of three air interfaces for the UMTS cellular network standard.

NTT DoCoMo originally planned to launch the world's first 3G services, initially branded Frontier of Mobile Multimedia Access (FOMA), in May 2001.[2] However, by May 2001, NTT DoCoMo had postponed the full-scale launch until October 2001, claiming they had not completed testing of their entire infrastructure, and would only launch an introductory trial to 4,000 subscribers.[3] In doing so, they also renamed the service to Freedom of Mobile multimedia Access.[3] In June 2001 trial subscribers complained the mobile phones had insufficient battery life and crashed frequently, that there was inadequate network coverage, and that there were security issues within the handset itself.[3] As a result, DoCoMo recalled 1,500 handsets by the end of June 2001. FOMA successfully launched in October 2001, providing mobile telecommunications coverage to Tokyo and Yokohama.[3]

Initially - as the first full-scale 3G service in the world[4] - The first FOMA handsets were of an experimental nature, targeting early adopters, were larger than previous handsets, had poor battery life, while the initial network only covered the center of Japan's largest towns and cities. For the first 1–2 years, FOMA was essentially an experimental service for early adopters - mainly centered around communication industry professionals.

As NTT DoCoMo did not wait for the completion and finalization of the 3G Release 99 network specification, their 3G W-CDMA network was initially incompatible with the internationally deployed UMTS standard.[5] However, in 2004 NTT DoCoMo performed wide-scale upgrades on its network, bringing it into compliance with the specification and enabling 100% compatibility with UMTS handsets, including incoming and outgoing roaming.

Around March 2004, the FOMA network achieved mass adoption, and handset sales soared. As of September 29, 2007, FOMA had over 40 million subscribers.[6]

Terminals

NTT DoCoMo offers a wide range of FOMA branded handsets, which are made specifically for the Japanese market. FOMA handsets differ from Western UMTS handsets in several aspects, for example:

  • A standardized menu structure and chargers.
  • Japan-specific features such as i-mode or Osaifu-Keitai (electronic wallet).
  • Multiband-support, which includes band VI at 800 MHz for FOMA Plus-Area (newer models).
  • No support for dual-mode operation with GSM/EDGE (except some models branded by DoCoMo as World Wing).

Frequency allocations

In metropolitan areas, FOMA uses the UMTS band I around 2100 MHz, which has been originally assigned to IMT-2000 services worldwide, except in the Americas.[7] In order to improve coverage in rural and mountainous areas, NTT DoCoMo also offers FOMA services in the 800 MHz band originally assigned to the 2G PDC mova service, which corresponds to UMTS band VI and is similar to band V used in the United States.[7] These extended service areas are branded FOMA Plus-Area (FOMAプラスエリア) and require multiband terminals.

References

  1. ^ NTT DoCoMo. "FOMAハイスペード" (in Japanese). Archived from the original on 2009-04-21. Retrieved 2009-06-10.
  2. ^ Yabusaki, Masami (2001-03-12). "3GPP TSG_SA Vice-Chairman Nomination" (PDF). Retrieved 2009-02-12.
  3. ^ a b c d ICFAI Center for Management Research (2003). "ICMR Case Collection: DoCoMo - The Japanese Wireless Telecom Leader" (PDF). Archived from the original (PDF) on December 29, 2009. Retrieved 2009-02-12.
  4. ^ "NTT Docomo Case Study | Picsel Technologies". Picsel. 2007-11-19. Archived from the original on 2009-09-14.
  5. ^ Hsiao-Hwa Chen (2007), John Wiley and Sons, pp. 105–106, ISBN 978-0-470-02294-8 {{citation}}: Missing or empty |title= (help)
  6. ^ "3G FOMA Subscribers Exceed 40 Million". NTT DoCoMo. October 2, 2007. Archived from the original on October 3, 2007. Retrieved 2007-10-03.
  7. ^ a b Okada, Takashi. "Mobile Terminal RF Circuit Technology for Increasing Capacity/Coverage and International Roaming" (PDF). NTT DOCOMO Technical Journal. Vol. 10, no. 2. pp. 47–56. Retrieved 2009-06-10.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Freedom_of_Mobile_Multimedia_Access&oldid=1244139370"