2017년 2월 1일 수요일

Platinum band (SoftBank)

Platinum band (SoftBank)

Vagueness evasion In this item, I explain 900MHz zone service of SoftBank. Please see "a platinum band" about the overall service around the 800MHz zone about the frequency band around the 800MHz zone in "an 800MHz zone".

The platinum band refers to a 700-900MHz obi in frequency bands assigned for mobile communication in Japan. I speak the service by the W-CDMA method of the 900MHz Zone that it is some models of the third generation mobile communication system cell-phone, SoftBank 3G of SoftBank in this clause, and is available.

A July 25, 2012 service start.

The 800MHz obi which FOMA plus area and KDDI, Okinawa Cellular Telephone (au) of NTT DOCOMO use is included in the definition of this platinum band.

Table of contents

Summary

In the 2.1GHz obi which SoftBank uses in SoftBank 3G and SoftBank 4G LTE and the 1.5GHz zone, going straight characteristics of the electric wave are stronger than an 800MHz Zone used with NTT DOCOMO and au. Therefore the electric wave situation in a building shadow or the mountains is bad. It is the communication service using the 900MHz obi which an electric wave turns around, and is easy to be crowded to improve this.

A lot of whom "an area is small" complaints, "I was easy to cut communication" were put to SoftBank, and the first place of the reason to cancel service included electric wave product poor quality of the company [1]. However, I anticipate that these electric wave situation is improved by the frequency acquisition of the 900MHz zone and announce, "it is docomo providing a platinum band than before and au and electric wave quality of the same class degree".

After a service start of July, 2012, in the place that became able to use the communication of the 900MHz zone, an offer range spreads out with progress of area maintenance such as a base station or the equipment installation [2].

According to the schedule that SoftBank Mobile (current SoftBank) announced, the service area starts at the time of a start of July 25, 2012 in the base station of several hundred stations. Is spread sequentially afterward, and build more it in approximately 41,000 stations by the end of population cover rate 90%, 2016 in 15,600 stations (22.2% of population cover rates), 2014 at several thousand stations, the end of 2012 before 2012, and plan it when do a population cover rate to 99.9% [3]; [4] [5].

5MHz width *2 that is available than July 25, 2012 provides data communication and a call by the HSPA+ (outbound 21Mbps, upbound 5.7Mbps) [6], and high speed communication by the HSPA+ is available to the third generation models of iPad with the platinum band support model as of March, 2012 [7]. In addition, about 10MHz width *2 of the remainder, it is a plan to provide LTE communication service from summer of 2014 that this becomes able to take advantage of.

A support model to mention later to use platinum band service is necessary. If it is a support model, the change of a 2.1GHz zone and the 900MHz zone is automatically carried out on the terminal side, and there is the merit that an electric wave improves if service and the rate available use a correspondence terminal for the user for equivalence.

In addition, because an electric wave obi of existing 2.1GHz increases a band of 900MHz, according to the announcement of SoftBank, anticipating it is relaxed puts up the congestion of the 2.1GHz Zone [8], and an offer starts FDD-LTE service (SoftBank 4G LTE) using 5MHz width *2 of the 2.1GHz Zone that it was in this way possible for in a line room from September 21, 2012 [9]; [10].

Use frequency

I share frequency with personal radio communications service (903-905MHz) (2015) until November 30 in 2015.

I it until the spring of 2014

W-CDMA (UMTS) band VIII

  • Mobile equipment → base station (the up): 900MHz - 905MHz
  • Base station → mobile equipment (descent): 945MHz - 950MHz

※An interval: 45MHz

After the summer of 2014

W-CDMA (UMTS) band VIII or LTE band 8

  • Mobile equipment → base station (the up): 900MHz - 915MHz
  • Base station → mobile equipment (descent): 945MHz - 960MHz

※An interval: 45MHz

I it about a name

The 800MHz zone was given Japan mobile communication and Daini Denden (it merges later in those days together current KDDI) of the chief editor with a license in the frequency for the cell-phone in Japan Toyota Motor Corporation where I entered by NTT Co. (current NTT) which started in 1979, communication liberalization of 1985. On the other hand, in the 1.5GHz Zone that was reported when you should free him for cell-phone use for the purpose of competition promotion in a council for electric wave of 1990, JR pro-Japan Telecom and Nissan Motor are entries. I started service as digital phone, Tu-Ka Phone KANSAI, digital on the same wavelength, Tu-Ka Cellular Tokyo, Tokai (at the time of each). Of these, a digital phone and the digital understanding each other perfectly are complicated and become J-Phone and reach present SoftBank via Vodafone, SoftBank Mobile, but SoftBank does not possess an 800MHz Zone from such a process.

The electric wave has a long outreach so that frequency is low. When SoftBank Mobile which did not last was a process of the frequency reorganization of the 800MHz zone, and only 1.5GHz and a 2.1GHz obi appealed saying it "is unfair I broke only the company, and not to have a hope", a meaning that utility value was high said an 800MHz Zone with "a gold frequency band". SoftBank Mobile (current SoftBank) which aimed at the acquisition ahead of a 700/900MHz Zone license grant of 2012 came to refer a 700-900MHz obi to "a platinum band" afterwards when I insisted, "you should assign it equally with NTT DOCOMO, KDDI". And, in February, 2012, allocation to SoftBank Mobile of the 900MHz zone is decided. After a press release of March 1, the following day, I came to call myself "a platinum electric wave" this time. However, it became the notation called "a platinum band" again at the new model presentation of May 29, the same year, and "the platinum electric wave" was not used. "Only the platinum band" is used now. In addition, the company performs a trademark application of "the platinum LTE" in the Patent Office in June, 2013 and may call planned LTE to start use from the frequency that SoftBank has in a 900MHz Zone with "platinum LTE".

But it is confirmed to name the LTE service of the 1.7GHz zone of EMOBILE Ltd. (current Y!mobile) which purchases eAccess Ltd. (including WILLCOM OKINAWA, Inc. of the current Y mobile, subsidiary), and started "a platinum band of the LTE" with some promotion documents, and the definition of the platinum band becomes vague.

Support model

Because the 900MHz obi which the platinum band uses is a frequency band used for cell-phones except the North America of the world as an international band switched by GSM, but is not used any place other than SoftBank Mobile in Japan;, in the original correspondence terminal, leading a global terminal. In addition, terminal made in Apple which has been released on (March 1, 2012) at the point of service announcement of the platinum band and product made in HTC terminal after X04HT, PANTONE 4 (105SH) terminal made in Sharp are support models [11].

In addition, the sound terminal (I include a smartphone) after the summer of 2012 model supports all models. But MVNO (there is part of non-compliant terminal in a released model from Y!mobile) of the WILLCOM (present.of SoftBank

It is the list of models announced that the following supports a platinum belt at the time of service in of July 25, 2012 or I am going to cope [12].

The correspondence terminal which was sold before service announcement
Terminal (summer of 2012 model) which was announced on May 29, 2012

The terminal which was announced after service in

  • All models of the sound terminal (I include a smartphone).
  • Some models of the terminal (mobile Wi-Fi routers) for exclusive use of the data communication.

In addition, the use enables a platinum band in form of the SoftBank roaming, and 302HW which it released in Y mobile lets the platinum band cope even with others, the EMOBILE 4G-S terminal of the eAccess Ltd. times and the terminal for the "telephone service" (type 1) of the Y!mobile brand of the succession contract at all terminals. In addition, 302HW which is a type 2 (is going to go off the air on January 31, 2018) terminal becomes the form of the SoftBank Mobile roaming, but the call that used a platinum band area is enabled.

Footnote

  1. ^ Platinum band authorization press conference presentation document (PDFI refer to the fifth page of)
  2. ^ Platinum band authorization press conference presentation document (PDFI refer to the 30th page of)
  3. ascii.jp July 24, 2012 when what changed by ^ "platinum band" start and easily gathered it up
  4. ^ SoftBank "platinum band 25th start of the earnest wish", wisteria Sankei business eye July 24, 2012 at first model-limited a use area
  5. The expanse of the ^ platinum band: Platinum band special site
  6. It is improvement and Son mobile phone Watch March 1, 2012 for a 900MHz zone of ^ SoftBank, "a stretch" including iPhone
  7. It is start mobile phone Watch March 10, 2012 at ^ SoftBank, the reservation reception desk of the "iPad" new model
  8. ^ Platinum band authorization press conference presentation document (PDFI refer to the 35th page of)
  9. LTE ^ SoftBank after this autumn for FDD, the rate of the correspondence smartphone are mobile Watch April 2, 2012, too
  10. FDD-LTE starts about an offer start of the ^ "SoftBank 4G LTE" in a 2.1GHz zone on ... September 21! ... SoftBank Mobile (September 14, 2012)
  11. ^ About the authorization of the use of new frequency 900MHz obi base station
  12. Question (FAQ) that ^ is common in | Please tell me the model supporting SoftBank Mobile platinum belt (900MHz zone).
  13. ^ "DELL Streak Pro 101DL" software update, correspondence including the platinum band, mobile Watch,2012 nine a year three days a month

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