‘ANNEX

PARAMETERS REFERRED TO IN ARTICLE 2

A. DEFINITIONS

Active antenna systems (AAS) means a base station and an antenna system where the amplitude and/or phase between antenna elements is continually adjusted resulting in an antenna pattern that varies in response to short term changes in the radio environment. This excludes long-term beam shaping such as fixed electrical down tilt. In AAS base stations the antenna system is integrated as part of the base station system or product.

Non-active antenna systems (non-AAS) means a base station and an antenna system that provides one or more antenna connectors, which are connected to one or more separately designed passive antenna elements to radiate radio waves. The amplitude and phase of the signals to the antenna elements is not continually adjusted in response to short term changes in the radio environment.

Synchronised operation means operation of two or more different time division duplex (TDD) networks, where simultaneous uplink (UL) and downlink (DL) transmissions do not occur, that is at any given moment in time either all networks transmit in downlink or all networks transmit in uplink. This requires the alignment of all DL and UL transmissions for all TDD networks involved as well as synchronising the beginning of the frame across all networks.

Unsynchronised operation means operation of two or more different TDD networks, where at any given moment in time at least one network transmits in DL while at least one network transmits in UL. This might happen if the TDD networks either do not align all DL and UL transmissions or do not synchronise at the beginning of the frame.

Semi-synchronised operation means operation of two or more different TDD networks, where part of the frame is consistent with synchronised operation, while the remaining portion of the frame is consistent with unsynchronised operation. This requires the adoption of a frame structure for all TDD networks involved, including slots where the UL/DL direction is not specified, as well as synchronising the beginning of the frame across all networks.

Equivalent isotropically radiated power (EIRP) means the product of the power supplied to the antenna and the antenna gain in a given direction relative to an isotropic antenna (absolute or isotropic gain).

Total radiated power (TRP) means a measure of how much power a composite antenna radiates. It equals the total conducted power input into the antenna array system less any losses in the antenna array system. TRP means the integral of the power transmitted in different directions over the entire radiation sphere as shown in the formula:

where P(θ,φ) is the power radiated by an antenna array system in direction (θ,φ) given by the formula:

where PTx denotes the conducted power (measured in Watts), which is input to the array system, and g(θ,φ) denotes the array system’s directional gain along the (θ, φ) direction.

B. GENERAL PARAMETERS

(1) The assigned block size shall be in multiples of 5,0 MHz;

(2) Within the 2 500–2 690 MHz frequency band, the duplex spacing for Frequency Division Duplex operation shall be 120 MHz with terminal station transmission (uplink) located in the lower part of the band starting at 2 500 MHz and ending at 2 570 MHz, and base station transmission (downlink) located in the upper part of the band starting at 2 620 MHz and ending at 2 690 MHz;

(3) The 2 570–2 620 MHz frequency sub-band shall be used for Time Division Duplex or for base station transmission (“downlink-only”). Any guard band required to ensure compatibility of frequency use at either the 2 570 MHz or the 2 620 MHz boundary shall be decided on a national basis and taken within the 2 570–2 620 MHz frequency sub-band.

C. TECHNICAL CONDITIONS FOR BASE STATIONS – BLOCK EDGE MASK

The following technical parameters for base stations, called Block Edge Mask (BEM), are an essential component of conditions necessary to ensure co-existence between neighbouring networks, in the absence of bilateral or multilateral agreements between operators of such neighbouring networks. Less stringent technical parameters, if agreed among all affected operators of such networks, may also be used provided that these operators continue to comply with the technical conditions applicable for the protection of other services, applications or networks and with obligations resulting from cross-border coordination.

The BEM consists of several elements given in Table 1. The in-block power limit is applied to a block assigned to an operator. The baseline power limit, designed to protect the spectrum of other operators within the 2,6 GHz frequency band, and the transitional region power limit, enabling filter roll-off from the in-block to the baseline power limit, represent out-of-block power elements.

Power limits are provided separately for non-AAS and AAS. For non-AAS, the power limits apply to the mean EIRP. For AAS, the power limits apply to the mean TRP (1). The mean EIRP or mean TRP are measured by averaging over a time interval and over a measurement frequency bandwidth. In the time domain, the mean EIRP or mean TRP is averaged over the active portions of signal bursts and corresponds to a single power control setting. In the frequency domain, the mean EIRP or mean TRP is determined over the measurement frequency bandwidth as given in Tables 2–8 below (2). In general, and unless stated otherwise, the BEM power limits correspond to the aggregate power radiated by the relevant device including all transmit antennas, except in the case of baseline and transition requirements for non-AAS base stations, which are specified per antenna.

The additional baseline limit for FDD AAS base stations is an out-of-block power limit which may be applied in order to reduce the necessary coordination zone with radio astronomy service (RAS) stations and protect the RAS in the adjacent frequency band 2 690–2 700 MHz in specific geographical areas.

Measures applicable at national level, such as pfd limits, in order to protect the various types of radars operating above 2 700 MHz would remain applicable, noting that it may be more complex for operators to comply with the pfd limit since AAS systems cannot be fitted with additional external filters.

Equipment operating in this band may also make use of EIRP or TRP limits other than those set out below, provided that appropriate mitigation techniques are applied which comply with Directive 2014/53/EU of the European Parliament and of the Council (3) and which offer at least an equivalent level of protection to that provided by the essential requirements of that Directive.

Explanatory note to the Figure

The applicable BEM limit is always the one immediately above the respective number (i.e. 1 to 5).

Table 1

Definition of BEM elements

BEM Element Definition In-block Refers to a block for which the BEM is derived. Baseline Spectrum within 2 500–2 690 MHz used for WBB ECS, with the exception of the block assigned to the operator and the corresponding transitional regions. Transitional region Spectrum within 0 to 5,0 MHz below and 0 to 5,0 MHz above the block assigned to the operator. Transitional regions do not apply to TDD blocks assigned to other operators, unless networks are synchronised. The transitional regions do not apply below 2 500 MHz or above 2 690 MHz. Additional baseline Spectrum between 2 690 –2 700 MHz.

Coexistence of geographically adjacent networks using also adjacent frequency blocks within the 2,6 GHz frequency band may need specific measures to mitigate radio interference. Typically, a frequency separation of at least 5 MHz should be applied in the case of two adjacent unsynchronised TDD networks or a TDD network adjacent to an FDD network. Such a separation should be implemented by either leaving a 5 MHz block unused as a guard block, or through usage of such a 5 MHz block under more restrictive BEM parameters (restricted spectrum block). Any usage of a 5 MHz guard block would be subject to an increased risk of interference.

To achieve coexistence of adjacent FDD and TDD networks, the restricted spectrum block 2 570–2 575 MHz (except in TDD uplink-only operation in this block) should be introduced for all adjacent configurations of (i) FDD-AAS to TDD-non-AAS; and (ii) FDD-non-AAS to TDD-AAS. Furthermore, the frequency block 2 615–2 620 MHz, which is immediately adjacent to the FDD downlink, may suffer an increased risk of interference due to the emissions from the FDD downlink.

The BEM for a spectrum block, other than a restricted spectrum block, is built up by combining Tables 2, 3 and 4 in such a way that the limit for each frequency is given by the higher value out of the baseline and the in-block power limits.

The BEM for a restricted spectrum block is built up by combining Tables 3 and 5 in such a way that the limit for each frequency is given by the higher value out of the baseline and the in-block power limits.

Furthermore, for base stations with restrictions on antenna placement, i.e. where base station antennas are placed indoors or where the antenna height is below a certain height, a Member State may use alternative BEM power limits on a national basis. In these cases the BEM for a restricted spectrum block for non-AAS may be in line with Table 6, provided that at geographical borders to other Member States, Table 3 applies and that Table 5 remains valid nationwide. For AAS with restrictions on antenna placement, alternative national measures compared to Table 3 or Table 5 may be required on a case-by-case basis.

Table 2

In-block power limit for non-AAS and AAS base stations

BEM element Non-AAS EIRP limit AAS TRP limit In-block Not obligatory. In case an upper limit is set by a Member State, a value between 61dBm/5MHz and 68 dBm/5 MHz per antenna may be applied. Not obligatory. In case an upper limit is set by a Member State, a value between 53dBm/5MHz and 60 dBm/5 MHz per cell (*1) may be applied.





Table 3

Baseline power limit for non-AAS and AAS base stations

BEM element Frequency range Non-AAS maximum mean EIRP limit per antenna AAS maximum mean TRP limit per cell (*2) Baseline FDD downlink; TDD blocks synchronised with the TDD block under consideration; TDD blocks used for downlink-only (*3); The range 2 615–2 620 MHz. + 4 dBm/MHz + 5 dBm/MHz (*4) Frequencies in the 2 500–2 690 MHz frequency band not covered by the definition in the row above. – 45 dBm/MHz – 52 dBm/MHz

Explanatory note to Table 3

Both the EIRP and TRP limits are integrated over a bandwidth of 1 MHz.

Table 4

Transitional region power limit for non-AAS and AAS base stations

BEM element Frequency range Non-AAS maximum mean EIRP limit per antenna AAS maximum mean TRP limit per cell (*5) Transitional region –5,0 to 0 MHz offset from lower block edge, or 0 to +5,0 MHz offset from upper block edge + 16 dBm/5 MHz (*6) + 16 dBm/5 MHz (*6)





Table 5

In-block power limit for non-AAS and AAS base stations for restricted block

BEM element Frequency range Non-AAS EIRP limit per antenna AAS TRP limit per cell (*7) In-block Restricted Block spectrum + 25 dBm/5 MHz + 22 dBm/5 MHz (*8)





Table 6

Power limits for restricted block for non-AAS base stations with additional restrictions on antenna placement

BEM element Frequency range Maximum mean EIRP limit Baseline Lower band edge of 2 500 MHz to –5,0 MHz offset from lower block edge, or +5,0 MHz offset from upper block edge to upper band edge of 2 690 MHz – 22 dBm/MHz Transitional region –5,0 to 0 MHz offset from lower block edge, or 0 to +5,0 MHz offset from upper block edge – 6 dBm/5 MHz





Table 7

Additional baseline power limit for FDD AAS base stations with regard to Radio Astronomy Service

BEM element Frequency range Case TRP power limit per cell Additional baseline 2 690–2 700 MHz A + 3 dBm/10 MHz B Not applicable Case A: This limit yields a reduced coordination zone with respect to RAS stations. Case B: For situations where additional baseline is not considered necessary by the concerned Member State (e.g. where there is no nearby RAS station or situation where no coordination zone is required).

Explanatory note to Table 7

These power limits may be applied to reduce the size of the coordination zone with RAS in specific geographical areas. Depending on the size of the necessary coordination zone to protect RAS station(s), cross border coordination may also be necessary. Additional measures may be needed on a national basis in order to protect RAS stations.

D. TECHNICAL CONDITIONS FOR TERMINAL STATIONS

Table 8

In-block power limits for terminal stations