1. Status On Current DFS
CEPT/ECC Civil/Military Meeting, November 2016, Prague
Thomas Weber, ECO, Spectrum Management

2. Overview CEPT Report 64 CEPT Report 57 WRC-19 Agenda Item 1.16
Revision of ECC Report 192
Explanatory paper related to RLAN equipment using the 5 GHz bands in vehicles
ETSI EN
ETSI TR

3. CEPT Report 64 (I)
CEPT Report 64 (published in November 2016) Report B from CEPT to the European Commission in response to the Mandate ‘To study and identify harmonised compatibility and sharing conditions for Wireless Access Systems including Radio Local Area Networks in the bands MHz and MHz ('WAS/RLAN extension bands') for the provision of wireless broadband services’
As of today, no satisfying conditions to protect incumbent services in & MHz.
Radiolocation in the bands MHz and MHz
ETSI have initiated work to analyse the feasibility of implementation and impact on RLAN operations of the new radar test signals for the bands MHz and MHz and further studies on these possible additional mitigation techniques continue to be carried out in the ITU-R and CEPT.
As far as meteorological radars in the MHz band are concerned, CEPT also proposed to ETSI to consider in this band the application of specific DFS conditions similar to those pertaining in the band MHz.

4. CEPT Report 64 (II)
It should be noted that the MHz band is an ISM band and various services and applications already operate in CEPT countries with and without DFS at various power levels under different ECC deliverables. Therefore, when discussing appropriate mitigation techniques for RLANs, the impact of interference from ISM devices and these existing radio communication applications into radiolocation systems would need to be considered for comparison purposes. In addition, no further sharing and compatibility analysis has been carried out for this service since the publication of CEPT Report 57, so the conclusions reported in CEPT Report 57 are still valid at this time.
Work is still required on the specification of appropriate mitigation techniques and/or operational compatibility and sharing conditions that would allow WAS/RLANs to be operated in the bands while ensuring relevant protection of the radiolocation services in these bands.
At the time of finalising CEPT Report 64, after consideration of the results of the studies so far and without knowing the conclusions of any further studies, it is not possible to specify any appropriate mitigation techniques and/or operational compatibility and sharing conditions that would allow WAS/RLANs to be operated in the bands while ensuring relevant protection of the radiolocation services in these bands.

5. CEPT Report 57 (I)
CEPT Report 64 followed the CEPT Report 57 Report A from CEPT to the European Commission in response to the Mandate.
The results from the WRC 15 did not impact the conclusions of CEPT Report 57 which are confirmed.
The band MHz is utilised for a variety of radiolocation applications. This also includes defense systems such as tactical and weapon radars as well as weather radars (ground based and airborne). For more information on the radio determination use of this band see section of CEPT Report 57.
With respect to sharing with Radiolocation services RLANs will also be required to demonstrate that coexistence between RLANs and radars not previously covered by ITU-R Recommendation M (in particular bi-static radars and radars that employ advanced and fast frequency hopping techniques) can be achieved.
A number of additional mitigation techniques have been proposed for further study (i.e. DFS, e.i.r.p. mask, new spreading and channeling arrangements, spectrum access system using geo-location database and further restrictions on maximum RLAN power).

6. CEPT Report 57 (II)
In addition for Radiolocation services, future sharing and compatibility studies will have to concentrate on ensuring that any enhancement of the DFS mechanism can protect the operation of the types of radar systems mentioned before.
Discussions on new radar test signals for the bands MHz and MHz for the possible inclusion in an appropriate European harmonised standard have been initiated.
However, it should also be noted that the MHz band is an ISM band and CEPT countries already allow generic SRD use (including RLAN) up to 25 mW in the band MHz without DFS under ERC/REC (annex 1).
In addition a number of CEPT countries allow use of the band MHz by BFWA up to 4W with the inclusion of DFS (up to 5850 MHz) to provide suitable mitigation under ECC/REC/(06)04.
Therefore, when discussing appropriate mitigation techniques for RLANs, the impact of interference from ISM devices and these existing radio communication applications into radiolocation systems would need to be considered for comparison purposes.

7. WRC-19 Agenda Item 1.16
Accommodating WLAN in MHz, MHz, MHz?
Removing indoor restriction in MHz ?
Mitigation techniques (EESS, radars …) ?
CPG/PTD is preparing AI1.16 and ITU-R WP5A studies

8. Revision of ECC Report 192
Revision of ECC Report 192 was amended 13 February 2015.
Adding of a procedure in Annex 2 (national examples/ country cases): The Czech Republic have developed a national procedure in order to deal with interference cases between meteorological radars and outdoor WAS/RLAN systems.

9. Explanatory paper related to RLAN equipment using the 5 GHz bands in vehicles
Explanatory paper related to RLAN equipment using the 5 GHz bands in vehicles, including the usage under the non-specific SRD regulation approved by WGFM in October 2016 (also reflected in introduction of ERC/REC 70-03)

10. ETSI EN
EN does not include the new FH radar test signal. These are only for the 5 GHz extension band and not for the existing 5 GHz spectrum
The DFS section in the RED version of the EN will not change and will not include the new spectrum
Revision of EN for RED underway in ETSI TC BRAN (target date for TC BRAN approval for ETSI ENAP is 11/2016)
WiFi and LTE-LAA with a common sharing mechanism and measurement procedures
Receiver blocking included in latest draft

11. ETSI TR
Sharing techniques under study in extension bands, including TR with radiolocation in to MHz and to MHz
Scope: to develop a Technical Report that describes new mitigation techniques to enable spectrum sharing with new Radiolocation systems as outlined in the CEPT and ITU-R studies
The Report will study the feasibility of RLANs implementing these new mitigation techniques. The report should at least include an analysis of the following possible additional mitigation techniques:
- (1) Enhanced Dynamic Frequency Selection (E-DFS) for new FH and other radar,
- (2) Dedicated Radar Signal Detectors/Collaborative Detection,
- (3) Reduced EIRP in combination with bandwidth restrictions
TB Approval in 1st half of 2017 planned

12. Thank You
for your attention