Docomo, Tokyo Institute of Technology achieve world’s first 10 Gbps packet transmission

TOKYO —

NTT Docomo said Thursday that in a joint outdoor experiment conducted recently with the Tokyo Institute of Technology, it succeeded in the world’s first packet transmission uplink rate of approximately 10 Gbps. The test, which is expected to help pave the way for future super-high-bit-rate mobile communications, took place in Ishigaki City of Okinawa Prefecture, on Dec 11, 2012.

In the experiment, a 400 MHz bandwidth in the 11 GHz spectrum was transmitted from a mobile station moving at approximately 9 km/h. Multiple-input multiple-output (MIMO) technology was used to spatially multiplex different data streams using 8 transmitting antennas and 16 receiving antennas on the same frequency.

In light of the squeeze on remaining frequencies as mobile data traffic continues to increase, Docomo said it aims to achieve a transmission speed of more than 10 Gbps using super-high-frequency bands exceeding 5 GHz. Such high frequencies have been difficult to use for mobile networks due to the limited distances their waves are able to travel, especially along indirect paths such as around buildings. This is why more robust lower-frequency waves have been the preferred choice for mobile communications systems so far.

The technologies behind the experiment also are applicable to downlink packet transmissions, suggesting that it should be possible to achieve a 10Gbps downlink, which is one hundred times the 100Mbps maximum rate of Docomo’s current Xi LTE service.

  • -8

    basroil

    10gbps connections, even wireless ones, have been around for ages. What is the purpose of this one, why is it considered "world's first", and what practical applications will it have? Can someone update the "article" to address these questions that should have been answered before submitting?

  • 1

    Warren Antiola

    basroil < You have not apparently read the article well. The keywords are "mobile station moving at approximately 9 km/h". The ones you are quoting from are from stationary or "in office". This is for the mobile walker or commuter. This has NEVER been achieved altho it was made available. I am willing to bet if you do have access to 10gbs connection it have never reached the full 10gbs.

  • -5

    basroil

    Warren AntiolaMar. 01, 2013 - 06:11AM JST

    You have not apparently read the article well.

    You apparently didn't read my post very well.

    The keywords are "mobile station moving at approximately 9 km/h".

    You know that's a joke right? 9km/hr is walking speed, you can keep a bridged wifi connection at that rate if you just set it up.

    The ones you are quoting from are from stationary or "in office". This is for the mobile walker or commuter.

    http://www.nttdocomo.com/pr/2013/pdf/20130227_attachment02.pdf That look "mobile" to you? It's a freaking car, hardly mobile.

    This has NEVER been achieved altho it was made available.

    Bridge 16 802.11ac antennas (usually means 8 devices) like they did in this experiment and you'll end up with ~13gbps. Hell

    I am willing to bet if you do have access to 10gbs connection it have never reached the full 10gbs.

    I've maxed out a 100mbps connection just fine, and 10gbps of meaningless data between two points that discard dropped data packets is a joke. Note that they never mentioned the details of the data transmissions, so we can assume it's not TCP or any other actual data transmission protocol meant for data security. Full 10gbps on raw stream speed has been done before, as early as 2006.

    Besides, the issue isn't that, rather why this was used: http://www.nttdocomo.com/pr/2013/001640.html

  • 1

    changamangaliay

    @basroil

    "10gbps connections, even wireless ones, have been around for ages."

    Good you please give some reference that supports your claim?

  • 3

    AU_user_since_1998

    This is not a magnificent breakthrough, though something worth to be admired and honored for pushing forward the communication super highway ahead of its usual pace. The usual pace of advancement in communications technology is somehow related to the Moores Law of Integrated Circuit, which states that every two years, the processing speed and performance of the microprocessors (as they are made by millions of transistors) is DOUBLED.


    The current technology is no doubt can achieve that speed already. The current technology of LTE is 10-MHz wide in the spectrum of 800MHz, 1.7GHz, 1.9GHz, and 2.1GHz. (This is specially true in the case of AU and Softbank. Docomo may have been using the 20-MHz bandwidth. 10-MHz bandwidth using MIMO/OFDM/SDMA can already have an upload/UPLINK of 20 to 30 Mbps. (for the sake of computation, lets make it 25-Mbps,


    If you multiply 10-MHz bandwidth by 40 to make it 400-MHz bandwidth, and multiply 25Mbps x40 = 1.0Gbps, then it seems to be that it is not difficult to achieve. But multiplying the current technology of 10-Mhz by a factor of 40 does not necessarily mean getting just 1.0Gbps because the factor 40 is applicable only to 2-D computation like the technology of FDMA/TDMA. The technology involved in the current LTE is Orthogonal-Frequency Division and Spacial-Frequency Division.... somthing like 3-D. The volume of data (and its speed) when the bandwidth is doubled will not increase arithmetically but somewhat like exponentially.


    But as I said it many times before here, the wireless speed is nothing if there is no advancement in FTTx, specifically in FTTA or Fiber-To-The Antenna. All cell-cites and antenna (up to the top of the tower, must be connected by a stable 10-Gbps Fiber Optic Link. The current technology is somewhat stuck at 1-Gbps. There are still so many challenges in 1-Gbps optical link on top of the tower (antenna) so making it 10-gbps is really not an easy task.

  • 1

    hokkaidoguy

    basroil: It's a freaking car, hardly mobile.

    Yes, that's what they're called autoimmobiles.

  • 0

    Warren Antiola

    Thanks guys! You can not apparently fix ignorance infront of the facts. I'm just saying. . . It's been there and I just presented. Everything you guys submitted are all searchable and verifiable. Otherwise why would there be a press release here and through AP & Reuters? thanks for the support!

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