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AI 1.13 Spectrum for mobile broadband

Agenda item 1.13

 

1.13        to consider identification of frequency bands for the future development of International Mobile Telecommunications (IMT), including possible additional allocations to the mobile service on a primary basis, in accordance with Resolution 238 (WRC-15);

Resolution 238 (WRC-15)Studies on frequency-related matters for International Mobile Telecommunications identification including possible additional allocations to the mobile services on a primary basis in portion(s) of the frequency range between 24.25 and 86 GHz for the future development of International Mobile Telecommunications for 2020 and beyond

IMT systems are currently being evolved to provide diverse usage scenarios and new applications. These applications will provide higher data rates and offer lower latencies.  Examples include enhanced mobile broadband (eMBB), massive machine-type communications (mMTC) and ultra-reliable and low-latency communications (URLLC). These will require larger contiguous blocks of spectrum than currently available in existing mobile service allocations.

It is important to note that the properties of higher frequency bands, such as shorter wavelength, would better enable the use of advanced antenna systems, including multiple-input and multiple-output (MIMO) and beam-forming techniques in supporting eMBB.

Some countries are proposing to use spectrum in bands other than the bands identified in the Resolution 238 (WRC15) for initial deployment of 5G IMT . In particular Korea, Japan and the US intend to be use the 28 GHz band for early 5G services.

Manufacturers support the initial focus of the studies on the 24.25-27.5 GHz band. Identification of this band for IMT would give a significant amount of spectrum for meeting specific 5G requirements. This would also allow countries to benefit from economies of scale due to the possibility for equipment to support a continuous "tuning range" covering not only the 24.25-27.5GHz band but also the spectrum above 27.5 GHz that will be used for early 5G deployments including in the US, Korea and Japan. Europe has declared a clear priority for this 24.25-27.5GHz band through the adoption of a harmonisation decision including relevant conditions for the protection of other services in the band and adjacent bands.

 

Resolution 238 (WRC-15) invites ITU-R to carry out studies to determine the spectrum needs for the terrestrial component of IMT in the frequency range between 24.25 GHz and 86 GHz. It also invites ITU-R to undertake sharing and compatibility studies, taking into account the protection of services to which the frequency band is allocated on a primary basis. The frequency bands set out for consideration in the Resolution 238 (WRC15) are :

–                 24.25-27.5 GHz[1], 37-40.5 GHz, 42.5-43.5 GHz, 45.5-47 GHz, 47.2-50.2 GHz, 50.4‑52.6 GHz, 66-76 GHz and 81-86 GHz, which have allocations to the mobile service on a primary basis; and

–                 31.8-33.4 GHz, 40.5-42.5 GHz and 47-47.2 GHz, which may require additional allocations to the mobile service on a primary basis.

 

Broadly speaking for a user experienced data rate of 1 Gbit/s , 3.3GHz is needed per user/device at margin of service indoor.  For 100Mbit/s user experience, 0.67GHz would be needed per user at the edge of service in wide area coverage.

The methods to satisfy the agenda item are best understood if organised by frequency bands, as follows: Item A (24.25-27.5 GHz), Item B (31.8‑33.4 GHz), Item C (37-40.5 GHz), Item D (40.5-42.5 GHz), Item E (42.5-43.5 GHz), Item F (45.5-47 GHz), Item G (47-47.2 GHz), Item H (47.2-50.2 GHz), Item I (50.4-52.6 GHz), Item J (66-71 GHz), Item K (71-76 GHz), and Item L (81-86 GHz).

Compatibility and sharing studies

Frequency group A: 24.25-27.5 GHz

The frequency range 24.25-27.5 GHz, or parts thereof, is allocated to the EESS, FS, FSS, ISS, MS, RLSS, RNS and SRS. The frequency bands adjacent to this frequency range are allocated to the EESS (passive), RAS, RLS and SRS (passive).

Frequency group C and D: 37-40.5 GHz and 40.5-42.5 GHz

The frequency range 37-42.5 GHz, or parts thereof, is allocated to the broadcasting service, BSS, EESS, FS, FSS, MS, MSS, RAS and SRS. The frequency bands adjacent to this frequency range are allocated to the EESS (passive) and SRS (passive).

Frequency band 42.5-43.5GHz

The frequency range 42.5-43.5 GHz is allocated to the FS, FSS, MS and RAS. Studies were carried out for the FS, FSS (Earth-to-space) and RAS.

Frequency range 45.5-47 GHz

The frequency range 45.5-47 GHz, or parts thereof, is allocated to the MS, MSS, RNS and RNSS. The frequency bands adjacent to this frequency range are allocated to the ARS and ARSS.

Frequency range 47-47.2 GHz

The frequency range 47-47.2 GHz, or parts thereof, is allocated to the ARS and ARSS.

Frequency range 47.2-50.2 GHz

The frequency range 47.2-50.2 GHz, or parts thereof, is allocated to the FS, FSS and MS. The frequency bands adjacent to this frequency range are allocated to the EESS (passive) and SRS (passive).

Frequency range 50.4-52.6 GHz

The frequency range 50.4-52.6 GHz, or parts thereof, is allocated to the FS, FSS and MS. The frequency bands adjacent to this frequency range are allocated to the EESS (passive) and SRS (passive).

Frequency range 66-71 GHz

The frequency range 66-71 GHz, or parts thereof, is allocated to the ISS, MS, MSS, RNS and RNSS.

Frequency range 71-76 GHz

The frequency range 71-76 GHz, or parts thereof, is allocated to the broadcasting service, BSS, FS, FSS, MS and MSS. The frequency bands adjacent to this frequency range are allocated to the ARS, ARSS, RAS and RLS.

Frequency range 81-86 GHz

The frequency range 81-86 GHz, or parts thereof, is allocated to the FS, FSS, MS, MSS and RAS. The frequency bands adjacent to this frequency range are allocated to the ARS, ARSS, EESS (passive),

 

 

The methods below have been identified in respect of each of the frequency bands studied. Where the option No Change (NOC) is selected there is clearly no need for a change to the Table of Allocations, however where an identification is made for IMT,  the ToA would need to be updated and footnotes and further Resolutions may be required.

 

The European Conference of Post and Telecommunications Administrations (CEPT) does not support IMT identification in the bands:

  • 31.8-33.4 GHz (32GHz band)
  • 71-76 GHz
  • 81-86 GHz

and CEPT is proposing NOC in respect of these bands. There is general agreement at ITU that the 32GHz band should be NOC. The paired bands 71–76 GHz and 81-86 GHz are used for Fixed Links and are also considered suitable by CEPT for backhauling of IMT-2020 stations.

CEPT has harmonised the 24.25-27.5 GHz band for Europe through the adoption of a harmonisation decision (ECC Decision ECC/DEC/(18)06). CEPT supports the band for worldwide harmonisation by an IMT identification under certain conditions as shown in the ECC Decision. Therefore, CEPT supports to allocate the 24.25-25.25 GHz frequency band to the MS on a primary basis in Regions 1 and 2 and to identify the 24.25-27.5 GHz frequency band for IMT in Regions 1, 2 and 3, subject to the conditions to be included in a New Resolution and the revision to Resolution 750.

Methods to satisfy the agenda item

Two alternatives for the IMT identification are contained in the most sub-sections. Alternative 1 identifies a frequency band for the terrestrial component of IMT within the LMS. This limitation would preclude the aeronautical or maritime use of the band for IMT.  Alternative 2 identifies a frequency band for the terrestrial component of IMT.

 

For both alternatives for the IMT identification method , the Method  would probably require potential conditions to protect services to which the frequency band and adjacent frequency bands are allocated. Administrations will make proposals to WRC-19 in relation to these taking into account the results of studies. Administrations could consider applying the IMT Resolution and/or modifications to Resolution 750 (Rev.WRC-15), or neither, based on the conditions selected when identifying the frequency band for IMT.

 

There is only one No Change method proposed for the Frequency band 31.8-33.4 GHz since IMT systems and radionavigation systems are incompatible

For all other frequency bands the following methods are generally possible.

No change to the Radio Regulations; or

Take the necessary steps to have a primary Mobile Service allocation in the band. Identification of the frequency band for IMT with two alternative sub methods; If this method is adopted then countries might have to apply some associated conditions.

CEPT positions

Item A: Frequency band 24.25-27.5GHz

CEPT has harmonised the 24.25-27.5 GHz band for Europe through the adoption of a harmonisation decision. CEPT supports the band for worldwide harmonisation by an IMT identification under certain conditions as shown in the ECC Decision. Therefore, CEPT supports allocation of the 24.25-25.25 GHz frequency band to the MS on a primary basis in Regions 1 and 2 and to identify the 24.25-27.5 GHz frequency band for IMT in Regions 1, 2 and 3, subject to the conditions to be included in a new Resolution and the revision to Resolution 750.

 

Item C: Frequency band 37-40.5 GHz

CEPT will not propose identification of this band and has no intention of using 37-40.5 GHz for IMT. CEPT would not oppose a global IMT identification for the full 37-43.5 GHz range. The benefit of identifying this wide tuning range that can be harmonised globally is that equipment manufacturers and vendors can serve the global market with the same products, thus maximising economies of scale, while allowing different administrations/regions the ability to identify the most appropriate frequencies within the range to be used for 5G. National regulators can make spectrum for 5G available when and where required.

 

Item D: Frequency band 40.5-42.5 GHz

CEPT proposes an IMT identification for 40.5-42.5 GHz. This is a priority band for CEPT and already identified for future harmonisation in Europe. CEPT considers that the band  40.5-4.5 GHz has good potential for future harmonisation in Europe.

 

Item E: Frequency band 42.5-43.5 GHz

CEPT proposes an IMT identification for 42.5-43.5 GHz. This is a priority band for CEPT and already identified for future harmonisation in Europe. CEPT considers that the band  42.5-43.5 GHz has good potential for future harmonisation in Europe.

 

Item F: Frequency band 45.5-47 GHz

No compatibility studies have been carried out of IMT (including maritime and airborne BSs/UE) with GSO/non-GSO MSS (Earth-to-space and space-to-Earth) (including maritime and airborne ESs).  Nor have compatibility studies been carried out of IMT (including maritime and airborne BSs/UE) with RNS, GSO/non-GSO RNSS (Earth-to-space and space-to-Earth) in the considered band. No compatibility studies have been carried out of IMT (including maritime and airborne BSs/UE) with ARS/ARSS in the band 47-47.2 GHz.

Method F1: No change to the Radio Regulations.

Method F2: No change, Proposal for further ITU-R study

Views were expressed that this method is outside the scope of agenda item 1.13 and should be reflected under agenda item 10.

 

Method F3: Identification of the frequency band 45.5-47 GHz for IMT in accordance with the following two alternative sub-methods

1) identify the frequency band for the terrestrial component of IMT within the LMS in Regions or globally, taking into account RR No. 5.553.

2) identify the frequency band for the terrestrial component of IMT in Regions or globally, taking into account RR No. 5.553.

This Method 3 cannot ensure compatibility of IMT with existing services due to lack of studies.

If method 3 is adopted then countries might have to apply some associated conditions;

 

Method F4: Identification of the frequency band 45.5-47 GHz for IMT and removal of the frequency band from RR No. 5.553

1) identify the frequency band for the terrestrial component of IMT within the LMS in Regions or globally, and removal of the frequency band from RR No. 5.553.

2) identify the frequency band for the terrestrial component of IMT in Regions or globally, and removal of the frequency band from RR No. 5.553.

Those who propose method 4 consider that as those sharing studies undertaken show a large margin towards the MSS operating in this frequency band, there is no need to maintain the frequency band 45.5-47 GHz in RR No. 5.553. This would remove some protection of space services. However the consequences of the proposed modification to RR No. 5.553 have not been fully investigated.

 Condition F4 might not be in keeping with the agenda item, because it entails regulatory modifications that are outside the scope of WRC-19 agenda item 1.13 and Resolution 238 (WRC-15).

 

Item G: Frequency band 47-47.2 GHz

Method G1: No change to the Radio Regulations.

Method G2: No change, Proposal for further ITU-R study

This should be reflected under agenda item 10 as an item for WRC-23.

Method G3: Identification of the frequency band 45.5-47 GHz for IMT in accordance with the following two alternative sub-methods

1) allocate the frequency band for the Land Mobile Service and identify the frequency band for the terrestrial component of IMT within the LMS in Regions or globally.

2) allocate the frequency band for the Land Mobile Service and identify the frequency band for the terrestrial component of IMT in Regions or globally, taking into account RR No. 5.553.

View: This Method 3 cannot ensure compatibility of IMT with existing services due to lack of studies between IMT and Amateur radio Service/Amateur radio Satellite Service.

If method 3 is adopted then countries might have to apply some associated conditions;

 

 

Item H: Frequency band 47.2-50.2 GHz

Method H1: No change to the Radio Regulations.

Method H2: Identification of the frequency band 47.2-50.2 GHz for IMT in accordance with the following two alternative sub methods

1) identify the 47.2-50.2 GHz frequency band for the terrestrial component of IMT within the LMS.

2) identify the 47.2-50.2 GHz frequency band for the terrestrial component of IMT.

If method 2 is adopted then countries might have to apply some associated conditions;

 

 

Item I: Frequency band 50.4-52.6 GHz

Method I1: No change to the Radio Regulations.

Method I2: Identification of the frequency band 50.4-52.6 GHz for IMT in accordance with the following two alternatives

1) identify the 50.4-52.6 GHz frequency band for the terrestrial component of IMT within the LMS.

2) identify the 50.4-52.6 GHz frequency band for the terrestrial component of IMT.

If method 2 is adopted then countries might have to apply some associated conditions;

 

Item J: Frequency band 66-71 GHz

CEPT notes that this band may already be used by MGWS/WAS systems, including WiGig. IMT and MGWS/WAS should have equal access to this frequency band. An identification should not confer any priority to IMT and this should be emphasised in any footnote associated with identifying the band for IMT and in any associated WRC Resolution.

 

 

Item K: Frequency band 71-76 GHz

This band (paired with 81–86 GHz) is used for Fixed Links and is also considered suitable for backhauling of IMT-2020 stations. CEPT does not support these bands for identification for IMT.

 

Item L: Frequency band 81-86 GHz

This band (paired with 71–76 GHz) is used for Fixed Links and is also considered suitable for backhauling of IMT-2020 stations. CEPT does not support these bands for identification for IMT.



 

[1]   When conducting studies in the frequency band 24.5-27.5 GHz, to take into account the need to ensure the protection of existing earth stations and the deployment of future receiving earth stations under the EESS (space-to-Earth) and SRS (space-to-Earth) allocation in the frequency band 25.5‑27 GHz.