5G微信公眾平臺（ID：angmobile）特訊 2016年12月3日下午的「2016未來移動通信技術峰會」（由未來移動通信論壇主辦）的」5G提升城市智慧市長論壇」（由鄔賀銓院士主持）上，未來移動通信論壇發布了我國首份5G頻譜白皮書。
我們特別注意到，中國首份5G頻譜白皮書中所建議的可用於5G移動通信的頻段是：
（1）低於6 GHz的頻段：建議把3.3-3.6GHz、4.4-4.5GHz、4.8-4.99GHz用於5G；
（2）高於6 GHz的頻段：24.25GHz-86GHz中的11個頻段，尤其是其中的24.25-27.5GHz（可作為早期5G部署的「先鋒」頻段）、31.8-33.4GHz、37-43.5GHz。
具體內容，請大家詳細查閱中國首份5G頻譜白皮書中的下述精彩內容（裡面有很多「乾貨」）：
The common view from IMT industry regarding 5G spectrum in China is that 5G system need to support aggregation of frequency ranges: frequency bands below 6GHz for 5G coverage and capacity, high frequency band (above 6GHz) for 5G capacity and backhaul.
On January 7th, 2016, MIIT launched China 5G Technology R&D Trial to promote the development of 5G technology and standard in 3.4-3.6 GHz band. It was also planned to conduct IMT vs. FSS compatibility trial from 2016 to 2017 in this band.
At the WRC-15, China supported the identification of 3.3-3.4GHz, 4.4-4.5GHz, and 4.8-4.99GHz frequency bands for IMT under the discussion of WRC-15 agenda item 1.1. Although China did not join the footnotes (i.e. Footnote 5.429F to identify 3.3-3.4GHz band for IMT and Footnote 5.441B to identify 4.8-4.99GHz band or partial of the band for IMT, in listed region 3 countries) in the Radio Regulations, China is making progress in domestic coordination towards the IMT identification in 3.3-3.4GHz, 4.4-4.5GHz, and 4.8-4.99GHz frequency bands in Chinese Regulations on the Radio Frequency Allocation.
It was expected that C band will be the key 5G band in China, particular for initial 5G deployment.
To evaluate the spectrum requirements and candidate frequency bands for IMT in high frequency band, especially in the frequency ranges listed in WRC-19 agenda item 1.13 from 24.25 to 86 GHz, operators, manufacturers, and research institutes are conducting studies under the director of MIIT within the WRC-19 preparatory mechanism in China. The research ongoing include spectrum needs, simulation models, propagation models, IMT parameters, sharing and compatibility studies. China administration supports the activities to promote global/regional harmonization of 5G spectrum under WRC-19 agenda item 1.13. At this stage, China is taking more concentration on the sharing and compatibility studies in 26GHz and 40GHz frequency bands.
China mobile market is the biggest market in the world in terms of number of subscribers and numbers of BSs deployed and devices. And the growth of China mobile data traffic is close to the high end of the world development.
The mobile data traffic is expected to grow by more than 300 times from 2010 to 2020 and by more than 40,000 times from 2010 to 2030. For developed cities and hotspots in China, the growth of mobile data traffic will exceed the average growth for all of China. For example, from 2010 to 2020 in Shanghai, the mobile data traffic is projected to grow by 600 times. In Beijing and during this same period, it is estimated that hotspot traffic may grow by up to 1,000 times. The total number of devices connected by the mobile communications network will reach 2 compared to the global number of 10 billion. The number of IoT connections will also expand rapidly, reaching 1.5 billion.
Based on the technical performance approach determined in the spectrum needs of IMT in ITU-R WP5D, the spectrum needs should satisfy all these 3 capabilities of the network user experienced data rate, peak data rate and area traffic capacity. The scenarios to be considered as following :
圖1 應用場景
Below 6GHz used for seamless wide-area coverage, 24.25-43.5GHz: fulfill the indoor and outdoor hot spot capacity requirement. And 45.5-86GHz: fulfill the indoor hot spot capacity requirement.
The preliminary spectrum needs estimate result of IMT-2020:
圖2 頻譜需求
註：也可將24.25-43.5 GHz頻段重用於室內熱點覆蓋。
1、5G用頻考量的關鍵原則
（1）頻譜協調
Harmonisation of spectrum is a key element for the successful introduction of IMT-2020 (5G). Globally and regional harmonised spectrum should be the highest interested frequency bands for the mobile industry to achieve the economy-of scale. Consideration must also be given to the possibilities provided by the so-called tuning range solutions in which different parts of the band may be selected in different regions/countries. Therefore, harmonisation does not necessarily imply using exactly the same spectrum in all countries or regions of the world, as in some cases adjacent bands can be considered harmonised since it may be possible to design equipment to cover both bands, i.e. they are within the same tuning range. The same equipment could then be used in all the countries having implemented a spectrum arrangement within such tuning range. Such solutions may thus provide harmonization benefits in terms of economy-of-scale, early eco-system availability and roaming, as well as enabling delivery of the same applications in different regions. Future Forum notes that there is already considerably momentum around the 26.5 – 29.5 GHz frequency range, in particular in the USA (starting at 27.5 GHz) and in Korea (starting at 26.5 GHz), but also in Japan, as well as in the 40 GHz range, which provides important opportunities for global alignment.
（2）各頻段的不同特性
It is an important observation that no single band will provide a solution for all the IMT-2020 requirements, noting the diversity of future applications and their varying requirements for bandwidth, latency and coverage. Future Forum understands that spectrum resources below 1 GHz, such as the 450MH, 600MHz and 700 MHz bands, are crucial for provision of deep indoor coverage and extended outdoor coverage, in particular for early provision of mMTC and URLLC applications. Future Forum further considers the frequency range 3.3-3.6 GHz (with a possible future extension up to 4.2 GHz) as essential for a successful and early deployment of IMT-2020 in China that can offer both wider bandwidths and good coverage. These frequency bands in lower spectrum ranges will not alone be sufficient to deliver full IMT-2020 capabilities, as the bandwidth available in this range will not be capable of delivering the very high bitrates envisioned for certain IMT-2020 applications. As a consequence, initiatives such as WRC-19 Agenda Item 1.13 to make available higher frequency bands for IMT-2020 use are also necessary, in particular the higher bands above 6 GHz for high capacity services. Also among such bands there will be different characteristics, since propagation becomes increasingly limited with higher frequency. For instance, propagation loss for outdoor-to-indoor coverage may in some scenarios, e.g. urban or suburban with foliage loss, increase by about 15 dB or more at 40 GHz compared to 25 GHz.
（3）頻段的及時可用性
Spectrum resources for IMT-2020 are made available sufficiently early for the plan of China 5G commercial services no later than 2020. These frequency bands for early deployment, often referred to as pioneer bands, should be made available both in low, medium and high bands in the frequency range 450 MHz to 86 GHz. The lower band is appropriate for IoT communication as well as IMT-2020 mobile broadband service requiring very good coverage. Future Forum’s view is that the entire frequency ranges 3.3-3.6 GHz and 24.25-29.5 GHz (24.25-27.5 GHz in the context of AI 1.13) should be considered as pioneer bands, and that higher frequency bands above 29.5 GHz would become relevant at a later stage.
（4）頻譜的連續性
Future Forum has a strong preference for contiguous spectrum, noting that while carrier aggregation is possible it will result in additional implementation complexity and cost.
（5）頻譜共享
Detailed information on current incumbents, the extent of their current spectrum usage and plans for the future, together with sharing analysis and mitigation techniques are key elements in determining the possibilities for successful IMT-2020 usage of different frequency bands. Future Forum notes that the propagation characteristics of higher frequencies may enable sharing to a larger extent than for spectrum below 6 GHz, especially if used together with efficient sharing mechanisms.
2、對中國5G用頻的提議
（1）低於6 GHz頻段
①3.3-3.6GHz band: should be the primary band for the introduction of 5G use in China by 2020. The part of band 3.4-3.6GHz is already harmonised for mobile networks. The 3.3-3.6GHz band consists of up to 300 MHz of continuous spectrum enabling wide channel bandwidth. Making sure a timely deployment plan for this band is crucial for the 5G network rollout in China.
②4.4-4.5GHz and 4.8-4.9GHz: Should be the band for 5G use in China and should be important to try for harmonization the usage with Japan and Korea as much as possible. Making regional harmonization is needed first for these 2 bands.
（2）高於6 GHz頻段
Frequencies to be considered in WRC-19 AI 1.13 for IMT-2020: 24.25GHz-86GHz, Promote extensive study for global harmonization, R&D progress for the dealing with the different propagation characteristics for the different frequency bands and frequency sharing with existing systems.
①24.25-27.5GHz: This frequency range is a good candidate for a tuning range solution together with the 28 GHz frequency band (26.5/27.5-29.5 GHz), and is consequently considered as a good choice of pioneer band for early deployment in China.
②31.8-33.4GHz: This frequency band may provide a tuning range solution with the 28 GHz frequency band. If so, the same advantages would be achieved as for 24.25-27.5 GHz. However, this frequency band does not provide the same bandwidth as 24.25-27.5 GHz, it is not immediately adjacent to the 28 GHz frequency band, but directly adjacent to the passive services below 31.8 GHz, and may consequently suffer from difficulties in implementation design. There may in addition be a need for a guard band above 31.8 GHz limiting the available bandwidth further. It should be more difficult for deployment in comparison with 24.25-27.5 GHz.
③37-43.5GHz: The momentum in this frequency range is good due to the development in the U.S. and a good bandwidth could be provided. It is noted that the entire range may not become available globally, due to incumbents in parts of the band. However, a tuning range approach may enable a global harmonization in the sense that parts of the band can become available everywhere.
④28GHz band considered in U.S, Korea and Japan: it has strong momentum globally, thus providing an opportunity for early availability of an eco-system with good economy-of-scale and potential international harmonization.
我們是專門關注5G移動通信的第一大新媒體平臺：5G標準化、政策、頻譜、技術、產品、業務、市場的最新現狀與趨勢。