13 thoughts on “WRC 19 Report: IMT in the frequency bands 24.25-27.5GHz & 45.5-47GHz”

1. Agenda Item 1.13. This seeks to examine proposals for 5G mobile to use additional bands in higher frequencies than the mobile industry previously had the technology to use. It may be the first of many such requirements given the burgeoning demand from the mobile sector. The GSA’s Joe Barrett points out, “Spectrum for 5G above 6 GHz is a key component of WRC-19 and GSA is representing the mobile supplier ecosystem in cooperation with the mobile operator association, GSMA, to support the allocation of enough harmonized spectrum to make sure 5G services can be delivered and customer expectations can be met.”

   He continues: “Access to a broad range of spectrum resource is the main growth driver for the deployment of wireless services; conversely spectrum can also be a limiting factor for the expansion of wireless broadband into new markets and industries. GSA therefore advocates that a range of frequency bands should be made available for mobile broadband including the low-band (below 2 GHz), mid-band (2 GHz to 6 GHz) and high-band (above 6 GHz).”

   Moreover, it will need to be available in specific configurations. “GSA recommends that at least 1 GHz of spectrum, ideally contiguous, is made available per network, from high-bands to support the full range of coverage and capacity needs that are, and will be, demanded by public organizations, private businesses, and consumers,” says Mr. Barrett. “Commercial deployments in the U.S. are underway, and Korea and Japan services are planned to start in 2020. Many other countries are in the process of planning to license high-bands following WRC-19.”
   ………………………………………………………………………………………………………….
   Additional Spectrum For IMT-2020 Networks Otherwise Known as 5G:
   5G is expected to connect people, things, data, applications, transport systems, and cities in smart networked communication environments. It should transport a huge amount of data much faster, reliably connect an extremely large number of devices, and process very high volumes of data with minimal delay.

   https://www.ptc.org/2019/10/wrc-19-how-will-we-regulate-the-global-multi-trillion-dollar-wireless-ecosystem/

2. Michael Kraemer, Intel- Dusseldorf, Germany
   https://www.itu.int/net4/ITU-D/CDS/GSR/2018/bio.asp?speaker=443

3. 5G/IMT 2020 Spectrum bands under study (AI 1.13):

   Existing mobile allocation/ No global mobile allocation
   24.25 – 27.5 GHz/ 31.8 – 33.4 GHz
   37 – 40.5 GHz/ 40.5 – 42.5 GHz
   42.5 – 43.5 GHz
   45.5 – 47 GHz/ 47 – 47.2 GHz
   47.2 – 50.2 GHz
   50.4 – 52.6 GHz
   66 – 76 GHz
   81 – 86 GHz
   ……………………………………………………………………………
   24.25-27.5 GHz is a clear priority for immediate study within CEPT.

   RCC Administrations consider it reasonable to perform studies on IMT system compatibility first of all in the frequency bands 24.25 – 27.5 GHz, 31.8 – 33.4 GHz and 40.5-42.5 GHz and 66 – 71 GHz, where global harmonization could be achieved.

   https://www.itu.int/en/ITU-R/seminars/rrs/RRS-17-Americas/Documents/Forum/9_ITU%20Diana%20Tomimura.pdf

4. GSMA Summary:
   • 26 GHz has multi-regional support.
   • Optimal IMT unwanted emission limits are needed to protect EESS (passive), while allowing IMT to operate. Other technical conditions are unnecessary and will hinder 5G.
   • The 26 GHz band is adjacent to 28 GHz, allowing wide harmonisation, economies of scale and early device availability for 5G. IMT 2020.

   https://www.gsma.com/spectrum/wp-content/uploads/2019/10/Enabling-IMT-at-WRC-19.pdf

5. What: Identifying 24.25-27.5 GHz for IMT.
   Why: Potential for global harmonisation to boost mmWave 5G leading to early deployment.
   How: For the 26 GHz band, support for IMT starts with Method A2, Alternative 2: allocate 24.25-25.25 GHz to mobile on a primary basis in Regions 1 and 2 and identify 24.25-27.5 GHz to IMT.

   Unwanted emission limits will be established for IMT stations to protect EESS (passive) in the adjacent band at 23.6-24 GHz. Sharing studies for Conditions related to FSS and ISS such as A2e have shown large positive margins: no condition is necessary here.

   https://www.gsma.com/spectrum/wp-content/uploads/2019/10/Enabling-IMT-at-WRC-19.pdf

6. One of the biggest tasks for WRC-19 is to identify additional spectrum suitable for 5G. Securing 5G spectrum in the millimeter wave bands is the top U.S. priority at the Conference. Global harmonization of this part of the spectrum will enable economies of scale, lowering deployment costs for providers and device costs for consumers. The United States, along with regional partners in the Americas, are championing an approach to 5G that will promote global harmonization and flexibility to deploy 5G in this range of spectrum. This approach is consistent with U.S. leadership in spectrum policy: we consistently work to find new ways to more efficiently use and share spectrum and create opportunities for innovative new technologies. We do this while also ensuring necessary protections for other services that may occupy the same spectrum.

   But 5G is not the only game in town. The agenda for WRC-19 offers the promise of connectivity in many different forms – from earth stations in motion (ESIM) and high-altitude platform systems (HAPS) to non-geostationary orbit (NGSO) mega-constellation satellite systems, as well as enhanced Wi-Fi connectivity. All of these services and applications require updates to the Radio Regulations to launch and bring their innovative products to the four billion people who still lack connectivity, and are potential tools to support broadband connectivity in rural and remote areas, a priority for the United States.

   https://blogs.state.gov/stories/2019/11/18/en/us-leadership-ensures-we-all-benefit-global-connectivity

7. Allocation of additional spectrum (agenda item 1.13)

   Agenda item 1.13 considers additional spectrum allocation for terrestrial mobile services. As some of the spectrum blocks which could be allocated to mobile services are currently used for satellite services, the outcomes of this agenda item will be of interest to the satellite industry. The consequences will be particularly significant this year as there is demand for new spectrum allocations for terrestrial mobile services for the deployment of 5G, including the harmonisation of frequency bands for future 5G services above 24 GHz. As the GSMA noted in an open letter, WRC-19 is a critical step which “will determine whether – and when – the promise of 5G will be fully realised.”

   It will be important for regulators to strive for a balance between the needs of incumbent and new mobile operators and satellite operators under this agenda item, especially in the context of 5G.

   https://www.twobirds.com/en/news/articles/2019/global/the-implications-of-wrc-19-for-the-satellite-industry

8. WRC 19 Update for Region 2 (includes U.S.): 50.4-52.6 GHz band

   Options for the 50.4-52.6 GHz include no change to the Radio Regulations and a global IMT identification for the full frequency band. The text below contains the proposal to identify the frequency band for IMT, which was not considered and agreed in the Ad-Hoc Group on agenda item 1.13 and is submitted for further consideration by Committee 4.

   The frequency band 50.4-52.6 GHz is identified for use by administrations wishing to implement the terrestrial component of International Mobile Telecommunications (IMT). This identification does not preclude the use of this frequency band by any application of the services to which it is allocated and does not establish priority in the Radio Regulations. Resolution 750 (Rev.WRC 19) applies. (WRC 19)

9. WRC 19 Update for 47.2-50.2 GHz band (only the 47.2-48.2 GHz part being considered for IMT in all 3 regions)

   Options for the 47.2-50.2 GHz frequency band include no change to the Radio Regulations and a global IMT identification for the full frequency band. The text below is a possible compromise as middle ground between these proposals to identify only the 47.2-48.2 GHz part for further consideration by Committee 4.

   The frequency band 47.2-48.2 GHz is identified for use by administrations wishing to implement International Mobile Telecommunications (IMT). This identification does not preclude the use of this frequency band by any application of the services to which it is allocated, and does not establish any priority in the Radio Regulations. [Administrations are invited, when deploying IMT in this band, to take necessary steps to ensure protection of FSS earth stations][The IMT shall not claim protection from the FSS nor cause interference to the FSS and the TRP for the IMT base station shall not exceed −4 dB(W/200 MHz) and comply with Recommendation ITU-R M.2101.] (WRC-19)

10. Regarding the notification of IMT stations operating in the frequency band [24.45-27.5 GHz], which use an antenna that consists of an array of active elements [aka active antenna system (AAS)], the verification of No. 21.5 shall be calculated as follows:

    1) For a necessary bandwidth of 200 MHz or less:
    • The power delivered to the antenna = TRP + [TRP conversion factor]

    2) For a necessary bandwidth of more than 200 MHz:
    • The power delivered to the antenna = TRP + [TRP conversion factor] − 10log (necessary bandwidth/200 MHz) (dB).

    NOTE: a definition for total radiated power (TRP) in Article 1, as well as the amendment of No. 21.5 is needed to address the stations with an active antenna system (AAS).

11. https://www.developingtelecoms.com/telecom-business/telecom-regulation/8969-more-5g-bands-identified-at-wrc-19.html

12. Negotiators from around the world announced a deal Friday at a meeting in Sharm el-Sheikh, Egypt, for how to roll out 5G technology that operates using specific radio frequency bands.

    Studies completed before the negotiations by U.S. government agencies such as the National Oceanic and Atmospheric Administration, NASA and the Navy had warned that 5G equipment operating in the 24-gigahertz frequency band could interfere with transmissions from polar-orbiting satellites used to gather weather data. This could make forecasts much less reliable, the reports found.

    https://www.washingtonpost.com/weather/2019/11/22/global-g-deal-poses-significant-threat-weather-forecast-accuracy-experts-warn/

13. Negotiators from around the world announced a deal Friday at a meeting in Sharm el-Sheikh, Egypt, for how to roll out 5G technology that operates using specific radio frequency bands.

    Studies completed before the negotiations by U.S. government agencies such as the National Oceanic and Atmospheric Administration, NASA and Specifically, these highly technical analyses concluded that if deployed widely and without adequate constraints, telecommunications equipment operating in the 24 GHz frequency band would bleed into the frequencies that NOAA and NASA satellite sensors also use to sense the presence and properties of water vapor in the atmosphere, significantly interfering with the collection and transmission of critical weather data.

    The NOAA report, for example, warned of a potential loss of 77.4 percent of data coming from microwave sounders mounted on the agency’s polar-orbiting satellites.

    The agency’s microwave sounders operate at a frequency of 23.6 to 24 GHz, which is close to the frequency that the Federal Communications Commission auctioned off the use of for about $2 billion beginning this past March.

    The key concerns about 5G interference focus on what are known as baseline interference limits, often referred to as out-of-band emission limits. Navy had warned that 5G equipment operating in the 24-gigahertz frequency band could interfere with transmissions from polar-orbiting satellites used to gather weather data. This could make forecasts much less reliable, the reports found.

    https://www.washingtonpost.com/weather/2019/11/22/global-g-deal-poses-significant-threat-weather-forecast-accuracy-experts-warn/

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