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26 Nov 2009
By Dr. Hugh Bradlow
Nov
26
2009

Is this a global shift in geopolitical power?

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Why TD-SCDMA represents a global shift in geopolitical power

Can the deployment of a technology choice in one country, have a disruptive impact on the economies and manufacturing industries of the rest of the world? When the technology choice is supported by a powerful government, the population of the country is large enough and the capability to develop the technology is strong enough – probably yes.

Despite a very well developed global standard for 3G technologies based on the GSM-track (WCDMA), the Chinese over the past few years, have designed their own, known as TD-SCDMA. To date not much interest has been shown in the technology outside China and even in China one detects a certain reluctance on the part of the carriers to deploy this home grown technology. So why did they do it?

The answer lies in the fact that, like Japan in the 70’s and 80’s, China is proving it has the capability to commoditise even the most complicated technologies. WCDMA is a technology with its origins outside China and the Chinese do not share in any of the benefits of the intellectual property. TD-SCDMA by contrast is a technology entirely developed within China and for which they own all the intellectual property. Interestingly they chose to use “Time Division Duplex” (TDD) for this system. TDD uses one frequency band and transmissions occur alternatively in the upstream and downstream directions. By contrast the mainstream WCDMA technologies use “Frequency Division Duplex” (FDD) where 2 different frequency bands are used, one carrying only downstream traffic and the other upstream. On a recent trip to China I asked a Chinese academic why they chose TDD (which is generally regarded as inferior to FDD for various technical reasons too complicated to discuss here) and his answer was that it allows them to use all parts of the frequency band which is necessary given the spectrum shortage that we face globally. This is a valid point.

Given the lack of interest outside China will TD-SCDMA succeed? This is where it gets interesting because the Chinese Government has mandated that its largest carrier, China Mobile, must use TD-SCDMA for its 3G deployment (3G deployment has only recently started in China). This ensures that there is a domestic market for TD-SCDMA in the 100’s of millions which is clearly enough to achieve the economies of scale necessary for the technology to succeed. Furthermore, despite the indifference in the developed world, there are plenty of other regions that have yet to deploy 3G. For example, a billion people in Africa are mainly served by 2G and given the Chinese influence in many parts of Africa, it is a safe bet to assume that they will push their technology there.

So where does my grandiose claim of the geopolitical nature of this technology come in. Well, it is fairly clear that the Chinese intend to progressively build out their own technology systems for all sorts of technologies that they currently import – not just in telecommunications but in other areas such as manufacturing, transport, medicine, etc. They have the skills, technology and scale to make this possible. It means that European, US and Japanese technology developers are going to be facing a major challenge from a 4th competitor of global scale. It is also going to reduce the market opportunities for the vendors from outside China by cutting off the world’s most dynamically advancing market.

By Dr. Hugh Bradlow

Posts: 18

5 Comments

  1. Ben Carson says:

    The other, possibly naive thought that came to mind is that in a spectrum limited scenario, the time division aspects might provide advantages in densely populated environments. With the users spread out over timeslots, I imagine you’d see a reduction in multiple access interference, as you could re-use codes across timeslots. Given China’s high population density in some areas, this could be considered advantageous.

  2. Hao Qi says:

    This trend of in-house development will continue to rise as China’s economy grows even further. China is experiencing the tail end of economic convergence; as it gains more and more exisiting manufacturing/technological skills, it will begin to come up with its own technologies and techniques. It is not hard to see China adopting their own technologies, epsecially with national pride playing a large part in its history and development.

  3. Ray Briggs says:

    The concer arises, however, on the capabilities of this new deployment of 3G. TD-SCDMA sacrifices coverage capabilities and requires complex hardware to manage the network. Complexity=higher installation and running costs. How many countires/companies are going to support or build networks that are costly to build and maintain?

    Tests on the NextG network by Ericsson and Telstra have been rumored to produce speeds of up to 100mbps, which means the network is highly scalable. The only hope TD-SCDMA can really have is if the system behind it can handle much higher data speeds and allow for technology improvements. In a system that is in reality half-duplex, they can have more users than a full duplex system, but can those users successfully and consitently achieve fast data speeds? Without seeing test results on a large scale, it’s hard to say.

  4. Danny Kotlowitz says:

    For further evidence of how hard the Chinese government is pushing TD-SCDMA, have a look at these statistics reported to have been released by the Chinese Ministry of Industry and Information Technology on the number of devices that have been approved to connect to Chinese 3G networks:
    * TD-SCDMA: 218 devices (101 handsets, 94 data cards, 23 fixed wireless terminals)
    * CDMA2000: 145 devices (76 handsets, 69 data cards)
    * WCDMA: 134 devices (90 handsets, 44 data cards).
    (Data correct as at 20 November 2009. Source: “Beijing Business Today”, 3 December 2009.)

  5. Well, TD-SCDMA isn’t really doing so well despite being mandated. Here’s a quote from a recent Economist:


    “”"
    So when at last it awarded 3G licences in January this year it required China Mobile, the world’s largest operator by subscriber numbers, to use TD-S to build its 3G network.

    Because of its size, China Mobile is arguably the only operator on Earth that could establish a new technological standard on its own, but even this giant seems unable to make a success of TD-S. In a recent filing with financial regulators the company admitted that “we have encountered and may continue to encounter challenges in the deployment of our 3G services” and that “we may not be able to effectively and economically deliver our 3G services based on this technology.”

    China Mobile had hoped to have 10m TD-S subscribers by the end of 2009, but by the end of June it had signed up only 959,000. Of these, says Mr Zhuang, only half are using TD-S handsets. The other half are using the TD-S network to provide a mobile-broadband connection for laptops, which seems a more promising market until more TD-S handsets become available. The prospect that TD-S will be adopted outside China, never bright, has now faded altogether.

    Although China Mobile, Huawei and ZTE continue to talk up TD-S, they have already devised a face-saving exit strategy: to promote a new variety of LTE, called TD-LTE, which with enough hand-waving can claim to be derived in some respects from TD-S. “The reality is that they are two completely different, incompatible technologies, but it’s a nice way to get away from TD-S, by claiming it’s an upgrade or an evolution,” says Mr Thelander. China Mobile now requires all suppliers of 3G equipment to support smooth evolution to LTE, says Mr Jotischky.
    “”"

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