He Tingrun: TD

Tags:, TD, FDD, GHz frequency bands, LTE spec (View ID:513367)

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China should speed up the TD-LTE spectrum planning, TDD frequency resources trying to reverse the weak position of

Currently, the international spectrum allocation in TDD mode spectrum resources are relatively scarce, mainly located in the FDD TDD complement position, so that TDD spectrum allocation has been in a weak position.The frequency distribution of countries for TDD also proved the above conclusion.African countries will 1900MHz ~ 1920MHz (uplink) and 2010MHz ~ 2025MHz (downlink) of 35MHz of spectrum allocated to TDD.Basic method is similar to the division of Europe, Africa, but some countries have adopted a 15MHz × 2 plus 5MHz of TDD of FDD approach, relatively TDD in a secondary position, and some EU countries LTE FDD test using the 2.6GHz band, the basic rule of TD-LTE using this band may be; Japan TDD band is 2535MHz ~ 2630MHz, a total of 95MHz; U.S.3G band is 2496MHz ~ 2690MHz, which uses 47MHz TDD return, but because U.S.support for WiMAX, and 802.16m has been identified as the 4G standard, the United States is likely to 47MHz of TDD spectrum for the development of WiMAX.In our country there is a similar situation, so far as the business plan of the 390MHz frequency FDD, TDD frequency planning of 205MHz, FDD and TDD frequency resources of the planning has been the ratio of 1.9:1, the TD, although better than the international situation, but still significant resources vulnerable position.

In this situation, China is also trying to reverse the weak position of TDD frequency resources, such as China in the ITU-R WP5D presented at the fifth meeting of the proposed increase in 450-470MHz two segment program: both the TDD mode of the program as a whole, there will have equal shares of the FDD and TDD scheme, but the proposal has not yet been adopted by ITU.Therefore, TD-LTE, such as using the 450-470MHz spectrum, may be in two to tango in the international situation.In addition, even though China will be 2570-2620MHz frequency band assigned to TD-LTE network for the outdoors, but the EU shift the 2.6GHz frequency band allocated to the FDD.Especially France in November this year, the first wave of 4G spectrum auction will be international as the main application of 2.6GHz TDD frequency bands allocated to the FDD, TD-LTE indicates that it is difficult to obtain in France, based on the size of the opportunity.

Therefore, China's TD-LTE delay the introduction of spectrum planning, will further increase to solve the difficulty of TD-LTE spectrum.The reality is that the international spectrum allocation and distribution of the initiative, has been under control in the hands of Europe and other developed countries, China should be the leading TD-LTE industry as an opportunity, the TD-LTE spectrum planning initiated in the power spectrum of the United States and Europe control challenges, significance may far exceed the TD-LTE itself, but to enhance our spectrum resources in the field of discourse.

the lack of formation of low-frequency TD-LTE development and a major obstacle to achieving international

from the spectrum distribution, TDD spectrum resources are mainly concentrated 2GHz, 2.3GHz and 2.6GHz frequency bands, of which 22% are located in the 2.3GHz frequency band, 28% are located in the 2GHz band, 42% are located in the 2.6GHz band.2.3GHz and 2.6GHz is the most important global deployment of TD-LTE spectrum.More severe TD in the field of low frequency in a blank state, further widening the gap with the FDD, the formation of TD-LTE development and implementation of international major obstacle.

ITU defined below 1GHz frequency band for IMT mainly 450 ~ 470MHz and 698 ~ 806/862MHz.Currently, the international community for the 450 ~ 470MHz seven kinds of planning proposals for all the FDD, and has been adopted by ITU, and our proposed 450-470MHz all the programs as TDD and FDD and TDD have equal shares of the program has not been accepted by ITU.On TD-LTE is more important is 698 ~ 806/862MHz band (digital dividend band), the United States in early 2008 and has completed the auction of this band planning to start some of the band for FDD mobile broadband services, the draft ITU frequency plan has been accepted, Europe is planning to promote the US-based FDD program.Recently Britain, Germany, France, Spain and other European countries have started the auction, and the Asia-Pacific countries have not yet formed a regional program.It is clear from the international TDD at 800MHz in a very weak low-frequency position.This frequency distribution of the imbalance has posed a TDD technology and the future market development restrictions and constraints, has seriously affected the development and popularity of TDD, in particular, is not conducive to efforts to attract more international growth of TD-LTE camp.

China's TD-LTE as the leading country, should stand in the forefront of the international TDD camp, for TD-LTE for more spectrum rights.In addition to the relevant international organizations to strive for, the first should be clear as soon as the domestic TD-LTE spectrum plan, in addition to determine the 2GHz, 2.3 GHz and 2.6 GHz Band, the main as soon as possible a clear 450MHz and 800MHz low-frequency band TDD spectrum planning.

Therefore, actively promote the low-frequency spectrum for TDD, TD-LTE network is to improve capacity needs, but also to promote the TD-LTE industry to grow, the need to speed up the process of internationalization.The good news is that in October 2010 at the ITU-R WP5D ninth meeting, the Chinese delegation explicitly support the 800MHz band for TDD technology, to show the position of China's support for the development of TD.In response to this"gold" band, co-author of the Asia-Pacific Telecommunity two options: or all of the techniques used for TDD or FDD technology for all, in principle, LTE-Advanced and 802.16m can be used, ITU has accepted These two programs, but the final plan has not been determined.

accelerate the domestic commercial TD-LTE in the most important factor is the determination of national decision-making

in TD-LTE technology matured and the obvious advantages of the network under the premise of market expectations is the key operators determined.Also, look at the world FDD LTE is the"acceleration" of the layout of the TD-LTE will be left behind.According to GSA's latest report, as of October 2011, the world has 35 commercial LTE network, TD-LTE network with only two.As the birthplace of the Chinese TD-LTE, TD-SCDMA to remember that delay the introduction of large-scale commercial planning lessons, soon determined to scale the commercial launch of TD-LTE's plan to boost the international telecom operation and industry chain into TD-LTE confidence, should not repeat the same wavering of mistakes and wrong is useless fighters.