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ETSI - EN 302 326-1

Fixed Radio Systems; Multipoint Equipment and Antennas; Part 1: Overview and Requirements for Digital Multipoint Radio Systems

inactive
Organization: ETSI
Publication Date: 1 December 2005
Status: inactive
Page Count: 69
scope:

Multipoint radio systems

This multi-part deliverable is applicable to fixed digital multipoint (MP) radio systems, where multipoint encompasses both point-to-multipoint (P-MP) and multipoint-to-multipoint (MP-MP) network architectures.(Although MP-MP systems may, in principle, be realized using directional or sectorial/omnidirectional antennas, only those using directional antennas are within the scope of this multi-part deliverable).

The applicability of this multi-part deliverable to MP equipment is governed by the definition of a number of system profiles that define the set of consistent requirements (see clause 6) to which equipment shall conform. The supplier shall uniquely identify in the technical construction file which Equipment Classification(s) (EqC) (among those limited sets defined in clause 6 and annex A) apply to his equipment and assess it consequently.

The individual parts of this multi-part deliverable are applicable as follows:

The present document includes for multipoint radio systems (equipment and antennas, whether integrated or not):

• Descriptions and parameters of the characteristics of multipoint radio systems.

• Cross-references to EN 302 326-2 [6] and EN 302 326-3 [7] where limits for essential parameters for conformance with article 3.2 of the R&TTE Directive are concerned.

• Specifications which may be complied with on a voluntary basis (normative).

• Recommended limits for other parameters (informative).

• Informative text which assists in the understanding of the specification.

EN 302 326-2 [6] includes for multipoint radio equipment (whether or not integrated with an antenna):

• Essential requirements for conformance with article 3.2 of the R&TTE Directive.

EN 302 326-3 [7] includes for antennas used with multipoint radio systems (whether or not integrated with the equipment):

• Essential requirements for conformance with article 3.2 of the R&TTE Directive.

For Administration's guidance when notifying their regulated Interfaces in accordance with article 4.1 of the R&TTE Directive [1], annex B provides explanatory considerations on the applicability of the TCAM-RIG format for P-P Fixed Links. An example of such a notification is also provided. Annex H has been elaborated in co-ordination with the CEPT ECC WG SE.

Frequencies

This multi-part deliverable is applicable to multipoint radio equipment and antennas operating in bands allocated to Fixed Service and assigned by national regulations to MP applications, at the date of publication of this EN, within the following frequency ranges:

• Equipment:

- 30 MHz to 11 GHz.

- 24,25 GHz to 29,5 GHz.

- 31,0 GHz to 33,4 GHz.

NOTE 1: Equipment operating in the band from 40,5 GHz to 43,5 GHz is not covered by the present document, but is to be found in EN 301 997-1 and EN 301 997-2 (see bibliography).

• Antennas:

- 1 GHz to 3 GHz.

- 3 GHz to 11 GHz.

- 24,25 GHz to 40,5 GHz.

NOTE 2: Antennas operating in the band from 40,5 GHz to 43,5 GHz are not covered by the present document, they are found in EN 301 215-3 and EN 301 997-2 (see bibliography).

Antenna characteristics are not specified at frequencies below 1,0 GHz. Therefore, for either non-integral antennas below this limit or for equipment with integral antennas below this limit, the Harmonized EN 302 326-2 [6] and EN 302 326-3 [7] are not sufficient for the Declaration of Conformity, according to article 3.2 of the R&TTE Directive [1], and additional essential test suites for antenna requirements shall be agreed with the Notified Body.

Access methods

The scope of this multi-part deliverable places no restriction on access method (or combinations of access methods) used. The standard applies to certain equipment profiles defined in terms of Equipment Classification (EqC) and listed in clause 6.1. One field of EqC is Primary Equipment Type (EqC-PET), which although historically related to specific access methods places no restriction on access method used provided all requirements for the profile are met. The relationship between the former explicit access methods and the EqC-PET values is shown in informative annex B.

In general, requirements traditionally related to access method are related to EqC-PET. Exceptionally, some nonessential requirements depend upon the actual access method being used (e.g. where access methods using frequency hopping techniques are used there is a restriction on the hopping period).

Equivalent Modulation Order (EMO) and related capacity

The R&TTE Directive [1] recognizes that mandatory requirements may apply in order to use the spectrum effectively. A large number of factors contribute to the spectral efficiency of a deployed system, but two key parameters have historically been recognized and specified: Minimum Gross Bit Rate (MGBR) and modulation order. Historically, FDMA systems have specified the payload data rate in place of the MGBR, while others have specified the MGBR as the instantaneous bit rate applied to the modulator when user data are being carried. These issues are discussed in annex E.

Duplex methods

The present document is equally applicable to multipoint systems which use Time Division Duplexing (TDD) or Frequency Division Duplexing (FDD or H-FDD).

NOTE: Attention is also drawn to general guidance given within CEPT Recommendations and others to assigning spectrum so as to allow different systems to operate in adjacent assigned frequencies without unacceptable mutual interference. This is outside the scope of the present document but it is responsibility of the regulatory authorities. For this purpose CEPT Recommendations and Reports offer guidelines particularly in reference to the use of spectrum where different duplex methods are to be used. This includes advice, for systems using FDD, identifying which sub-band is to be used for upstream-links and which for downstream-links for easing the coexistence between neighbouring systems.

Asymmetric MP implementations

In general, P-MP systems will use corresponding multiplexing methods and multiple access methods in both CS-transmit and CS-receive directions, but nothing prevents dissimilar methods being applied in the alternate directions. Likewise, different radio characteristics (such as different modulation methods, different modulation orders) may be employed in the alternate directions, potentially resulting in asymmetrical capacities and performance. Furthermore, some systems may be designed to operate with different channel separations in up- and down-link directions.

NOTE 1: Implementations, such as in some FDMA systems, where some TS may use a subset of the channels assigned to the CS are not regarded as asymmetric MP implementations from the point of view of the channel separation.

In all asymmetric cases, the provisions of this multi-part deliverable shall apply independently to the transmit and receive directions of a given equipment.

NOTE 2: The deployment of asymmetric systems should take into account the licensing conditions of national administrations.

Antenna types

This multi-part deliverable specifies several antenna types appropriate for multipoint systems according to their radio frequencies, radiation patterns and polarization. Such antennas may be integral or non-integral.

• Bands of radio frequencies addressed are:

- 1 GHz to 3 GHz;

- 3 GHz to 11 GHz;

- 24,25 GHz to 40,5 GHz.

• Radiation pattern types addressed are: Directional, Sectored (both single beam and multi beam) and Omnidirectional.

• Polarization types addressed are: linear and circular, in orthogonal orientations.

The defined set of antennas does not include all combinations of the above attributes: the comprehensive list is further defined in clause 6.1.3. This multi-part deliverable is equally applicable to integral and non-integral antennas.

Not every antenna type may be coupled with every station type. Only the cases provided in clause 6.1.4 are in the scope of the present document.

Interoperability requirements

This multi-part deliverable does not set any requirements for interoperability between CSs, RSs and TSs from different manufacturers and no requirement or capability for such interoperability is either stated or implied.

Document History

June 1, 2007
Fixed Radio Systems; Multipoint Equipment and Antennas; Part 1: Overview and Requirements for Digital Multipoint Radio Systems
A description is not available for this item.
January 1, 2007
Fixed Radio Systems; Multipoint Equipment and Antennas; Part 1: Overview and Requirements for Digital Multipoint Radio Systems
Multipoint radio systems This multi-part deliverable is applicable to fixed digital MultiPoint (MP) radio systems, where multipoint encompasses both Point-to-MultiPoint (P-MP) and...
EN 302 326-1
December 1, 2005
Fixed Radio Systems; Multipoint Equipment and Antennas; Part 1: Overview and Requirements for Digital Multipoint Radio Systems
Multipoint radio systems This multi-part deliverable is applicable to fixed digital multipoint (MP) radio systems, where multipoint encompasses both point-to-multipoint (P-MP) and...
October 1, 2005
Fixed Radio Systems; Multipoint Equipment and Antennas; Part 1: Overview and Requirements for Digital Multipoint Radio Systems
General For the purpose of the present document, multipoint radio systems may be defined as radio systems which interconnect a number of fixed stations (usually more than two). The topology of the...
March 1, 2005
Fixed Radio Systems; Multipoint Equipment and Antennas; Part 1: Overview and Requirements for Digital Multipoint Radio Systems
General For the purpose of the present document, multipoint radio systems may be defined as radio systems which interconnect a number of fixed stations (usually more than two). The topology of the...

References

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