ERC/DEC/(99)23
`Archive only: ERC/DEC/(99)23 is withdrawn and replaced by ECC/DEC/(04)08
`
`Including the implementation status in the download area
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`
`
`EUROPEAN RADIOCOMMUNICATIONS COMMITTEE
`
`ERC Decision
`of 29 November 1999
`on the harmonised frequency bands
`to be designated for the introduction of
`High Performance Radio Local Area Networks
`(HIPERLANs)
`
`(ERC/DEC/(99)23)
`
`
`
`
`
`
`
`EUROPEAN CONFERENCE OF POSTAL AND TELECOMMUNICATIONS ADMINISTRATIONS
`
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`Archive only: ERC/DEC/(99)23 is withdrawn and replaced by ECC/DEC/(04)08
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`
`
`Copyright 1999 the European Conference of Postal and Telecommunications Administrations (CEPT)
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`ERC/DEC/(99)23
`Page 1
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`
`EXPLANATORY MEMORANDUM
`
`1
`
`INTRODUCTION
`
`HIPERLANs (High Performance Radio Local Area Networks) are radio based local area networking (RLAN)
`solutions, intended for connectivity between traditional business products such as PCs, laptops, workstations,
`servers, printers and other networking equipment as well as digital consumer electronic equipment in the wireless
`home network environment. HIPERLANs thus enable the replacement of physical cables for the connection of
`data networks within a building, providing a more flexible and, possibly, a more economic approach to the
`installation, reconfiguration and use of such networks within the business and industrial environments.
`
`Existing RLANs and other wide band data transmission systems are already operating in the ISM frequency bands.
`In order to ensure high reliability and high data transfer rates HIPERLANs, however, require a predictable sharing
`environment. The ISM bands are, therefore, not suitable to meet the requirement of HIPERLANs and other
`frequency bands have been identified for these kinds of services.
`
`In 1996, the ERC adopted ERC/DEC/(96)03, ”on the harmonised frequency band to be designated for the
`introduction of High Performance Radio Local Area Networks (HIPERLANs)”. This Decision harmonised the use
`of the band 5150-5250 MHz for HIPERLANs.
`
`In 1998, at the request of ETSI, the ERC recognised the need to take into account spectrum requirements for new
`multimedia applications of HIPERLANs and so initiated compatibility studies leading to the revision of
`ERC/DEC/(96)03. This new Decision designates several frequency bands in the 5 GHz range and stipulates
`specific conditions to be applied to HIPERLANs operating in the range.
`
`2 BACKGROUND
`
`The European Radiocommunications Committee (ERC), in co-operation with ETSI and after further analysis and
`spectrum engineering studies, identified suitable spectrum in the 5 GHz and the 17 GHz frequency ranges to meet
`the requirements of HIPERLANs. Based on this the ERC approved CEPT Recommendation T/R 22-06 in 1992.
`The Recommendation was revised in the beginning of 1994, based on a request from ETSI. The restriction with
`regard to integral antennas was removed, thus allowing both integral and external antennas to be used.
`
`The Detailed Spectrum Investigation Phase I (DSI I) completed in 1994, identified HIPERLANs as the major
`utilisation in the 5150-5250 MHz band and in the 5250-5300 MHz band on a national basis. The ERC decision
`ERC/DEC(96)03 was adopted in 1996 and designated the band 5150-5250 MHz for HIPERLANs. Furthermore
`ERC Recommendation CEPT/ERC/REC 70-03 on short range devices recommended the use of the bands 5150-
`5250 MHz, 5250-5300 MHz (on a national basis) and 17.1-17.3 GHz for HIPERLANs.
`
`The ETSI standards ETS 300 652 and ETS 300 836 for HIPERLANs Type 1 in the 5 GHz band have been
`adopted. An ETSI standard for HIPERLANs in the 17 GHz frequency range has not yet been initiated.
`
`In the meantime, WRC 95 allocated the band 5150-5250 MHz to the Fixed-Satellite Service (FSS) on a primary
`basis for use by feeder links of Non-Geostationary-Satellite systems in the Mobile Satellite Service (NGSO MSS).
`This band has also been allocated via footnote S5.447 of the Radio Regulations to the mobile service on a co-
`primary basis in a number of countries, mainly CEPT members, subject to agreement under S9.21.
`
`Detailed compatibility studies (Results of the studies are summarised in ERC Report 67) between HIPERLANs
`(Type 1 and Type 2) and MSS feeder links have shown that the sharing is feasible with some restrictions on
`HIPERLANs (i.e. indoor use, mean EIRP limited to 200 mW). Those restrictions would have to be taken into
`account in the development of ETSI Standards for HIPERLAN Type 2 as well as in the revision of ETSI Standards
`for HIPERLAN Type 1.
`
`
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`ERC/DEC/(99)23
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`
`In the ERC Report 72 the need for additional frequency spectrum for indoor and partly for outdoor use of
`HIPERLANs in the order of 330 MHz is recognised and in order to identify additional spectrum for HIPERLANs
`in the range 5250 – 5875 MHz compatibility studies were conducted with existing services (Results of the studies
`are summarised in ERC Report 72).
`
`As a result of these sharing studies and spectrum investigations, the following bands were identified for use by
`HIPERLANs under prescribed conditions:
`
`
`
` -
`
`5250-5350 MHz (indoor use, mean1 EIRP limited to 200 mW, use of Dynamic Frequency Selection and of
`transmitter power control);
`5470-5725 MHz (mean1 EIRP limited to 1W, outdoor and indoor use allowed, use of Dynamic Frequency
`Selection and of transmitter power control).
`
`-
`
`
`
`It was also recognised that HIPERLAN equipment must be capable of avoiding occupied channels by employing a
`Dynamic Frequency Selection mechanism and ensuring a uniform spreading of the devices over all the available
`channels for HIPERLANs. In addition a transmitter power control process capable of ensuring a mitigation factor
`of at least 3 dB is also required. These constraints do not apply to the already standardised HIPERLANs Type 1 in
`the band 5150 – 5250 MHz.
`
`By their nature, HIPERLANs will certainly move across borders. Moreover, the European industry must be in a
`position to market its products anywhere else in the world, and especially in major markets such as the USA and
`Japan. Therefore, a worldwide harmonisation must be envisaged. Such harmonisation should be supported by the
`provision of allocations of an appropriate regulatory status in the Radio Regulations to be considered at a future
`WRC.
`
`The long term market potential for HIPERLANs is not yet known but if the growth is substantial there could be a
`conflict with NGSO MSS feeder links using the same spectrum. Therefore a review process is required to review
`this Decision in the light of market developments.
`
`Due to the reduction of the available band for FSS feeder links to NGSO MSS after 2010, from 5091-5250 MHz to
`5150-5250 MHz, a future WRC should also consider the requirements for FSS frequency allocations beyond 2010,
`in the light of market developments of the MSS, HIPERLANs and other services in this band.
`
`3 REQUIREMENT FOR AN ERC DECISION
`
`The allocation or designation of a frequency band for its use by a service or a system under specified conditions in
`CEPT member countries is laid down by law, regulation or administrative action. The ERC recognises that for
`HIPERLANs to be introduced successfully throughout Europe, manufacturers and operators must be encouraged
`to make the necessary investments in this pan-European radiocommunication system and service. The ERC,
`therefore, believes it will be necessary to designate frequency bands for HIPERLANs under specified conditions.
`A commitment by CEPT member countries to implement an ERC Decision will depend on a clear indication that
`the required frequency bands will be made available on time and on a European-wide basis.
`
`The ERC Rules of Procedure state that if an ERC Decision is amended, it must be replaced and the old Decision
`abrogated. Therefore this Decision dictates abrogation of ERC/DEC/(96)03.
`
`
`
`1 The mean EIRP refers here to the EIRP averaged over the transmission burst at the highest power control setting.
`
`
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`ERC/DEC/(99)23
`Page 3
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`
`
`ERC Decision
`of 29 November 1999
`
`on the harmonised frequency bands to be designated for the introduction of
`High Performance Radio Local Area Networks (HIPERLANs)
`
`(ERC/DEC/(99)23)
`
`
`
`The European Conference of Postal and Telecommunications Administrations,
`
`considering:
`
`
`a)
`
`that the use of stationary as well as portable computer equipment, computer terminals and peripheral equipment by
`the business and industrial community, and the penetration of network enabled digital consumer electronic
`equipment is rapidly increasing;
`
`that there is an increasing requirement to exchange information between such equipment through Local Area
`Networks (LANs);
`
`that existing LANs consist of equipment interconnected by cable resulting in a rigid hardware structure;
`
`that LANs using radio (RLANs) enable a more flexible approach to the installation, reconfiguration and use of
`such networks, thus minimising the costs of cable and rewiring required to handle changes to and updates of the
`network;
`
`that there is a need to provide harmonised spectrum which enables the rapid deployment of High Performance
`RLANs;
`
`that ETSI has developed standards for High Performance Radio Local Area Networks Type 1 (HIPERLANs Type
`1), (EN 300 652 and ETS 300-836-1);
`
`that ETSI is developing standards for High Performance Radio Local Area Networks Type 2 which is intended to
`broaden the applications of HIPERLANs, including broadband access to public networks;
`
`that frequency management parameters, which include channel bandwidth and power limits of any emissions
`outside the designated frequency bands, shall be decided by ERC in consultation with ETSI;
`
`that the frequency band 5000-5250 MHz is allocated to the Aeronautical Radionavigation Service to be used for
`the Microwave Landing System (MLS) but there are no international plans for use of the frequency band 5150-
`5250 MHz by the aeronautical community;
`
`that, with effect from 1 January 1997, WRC-95 allocated the frequency band 5150-5250 MHz to the Fixed Satellite
`Service (Earth-to-Space) for Mobile-Satellite feeder links, on a co-primary basis with the Aeronautical
`Radionavigation Service. The band 5091-5150 MHz was similarly allocated on a temporary basis until 2010,
`subject to conditions designed to protect the International Standard Microwave Landing System which has
`precedence in the band 5000-5150 MHz;
`
`that the band 5150-5250 MHz is also allocated via footnote S5.447 of the Radio Regulations to the Mobile Service
`on a co-primary basis in a number of countries, mainly CEPT member countries, subject to agreement under S9.21;
`
`that a future WRC will have to reconsider the long term requirements (beyond 2010) for Fixed Satellite Service
`(Earth-to-Space) for Mobile-Satellite feeder links and for the Mobile Service in the light of market developments
`of FSS for MSS feeder links and HIPERLANs;
`
`
`m) that compatibility studies and spectrum investigations have shown that sharing between HIPERLANs and MSS
`feeder links in the band 5150-5250 MHz is feasible under certain conditions;
`
`
`b)
`
`
`c)
`
`d)
`
`
`e)
`
`
`f)
`
`
`g)
`
`
`h)
`
`
`i)
`
`
`j)
`
`
`k)
`
`
`l)
`
`
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`ERC/DEC/(99)23
`Page 4
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`n)
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`o)
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`o)
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`p)
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`that in many countries there is an essential military need for the operation of land, airborne and maritime radars in
`the bands between 5250 and 5850 MHz. In those countries priority is given to military radars and therefore
`protection from interference cannot be requested by HIPERLANs;
`
`that additional frequency spectrum for HIPERLANs is required in bands above 5250 MHz in order to
`accommodate the increased spectrum requirements for HIPERLANs;
`
`that the availability of additional spectrum for HIPERLANs enables a random choice of available channels to
`provide a spread of the channel loading over the designated spectrum, thus reducing the interference potential in
`the individual bands;
`
`that compatibility studies and spectrum investigations have shown that sharing between HIPERLANs and all
`existing services is possible and practicable in the bands 5250 – 5350 MHz and 5470 – 5725 MHz under
`conditions specified in ERC Reports 72 and 67,
`
`
`
`noting:
`
`a) that the implementation of transmitter power control in up- and downlink will significantly reduce the interference
`effect caused by HIPERLANs to ensure a mitigation factor of at least 3 dB on the average output power of the
`devices under the coverage area of a satellite;
`
`
`b) that HIPERLAN equipment will employ a Dynamic Frequency Selection (DFS) mechanism to detect interference
`from other systems and therefore is able to avoid co-channel operation with other systems, notably radar systems;
`
`
`c) that this DFS mechanism as described in noting b) will also be required to provide a spread of the loading across a
`minimum of 14 channels (or 330 MHz) to further facilitate sharing with satellite services;
`
`
`d) that frequency sharing based on active avoidance of co-channel operation requires an adequate amount of spectrum
`for HIPERLANs;
`
`
`e) that the frequency designations and operational conditions for HIPERLANs in the 5 GHz range will have to be
`reviewed in the long term in the light of market evolution;
`
`
`f) that a world wide frequency harmonisation for HIPERLANs will be beneficial and should therefore be supported
`through an appropriate regulatory status in the Radio Regulation;
`
`
`
`DECIDES
`
`1.
`
`that for the purpose of this Decision High Performance Radio Local Area Networks (HIPERLANs Types 1 and 2)
`shall mean equipment complying with the relevant European Telecommunications Standards;
`
`to designate the frequency bands 5150-5350 MHz and 5470–5725 MHz for the use of HIPERLANs;
`
`that the use of HIPERLANs in the band 5150-5350 MHz shall be restricted to indoor use with a maximum mean
`EIRP1 of 200 mW;
`
`that the indoor and outdoor use of HIPERLANs in the band 5470-5725 MHz shall be restricted to a maximum
`mean EIRP1 of 1 W;
`
`that, in addition to the conditions described in decides 3 and 4 and also noting decides 6 below, the use of
`HIPERLANs shall only be allowed when the following mandatory features are realised: a) transmitter power
`control to ensure a mitigation factor of at least 3 dB; b) Dynamic Frequency Selection associated with the channel
`selection mechanism required to provide a uniform spread of the loading of the HIPERLANs across a minimum of
`330 MHz, or 255 MHz in the case of equipment used only in the band 5470 – 5725 MHz.;
`
`
`2.
`
`3.
`
`
`4.
`
`
`5.
`
`
`
`
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`ERC/DEC/(99)23
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`that the features a) and b) described in decides 5 shall not be mandatory for HIPERLAN Type 1 equipment
`operated in the band 5150 - 5250 MHz. These exceptions should be reviewed in the light of market development
`of HIPERLANs;
`
`that the ERC will review this Decision within 2 years of the date of entry into force or earlier if necessary in the
`light of market development of HIPERLANs;
`
`that this Decision shall enter into force on 31 January 2000.
`
`that CEPT Member Administrations shall communicate the national measures implementing this Decision to the
`ERC chairman and the ERO when the Decision is nationally implemented.
`
`
`
`
`Note:
`Please check the ERO web site ( www.ero.dk ) under “Documentation / Implementation” for the up to date position on
`the implementation of this and other ERC Decisions.
`
`
`6.
`
`
`7.
`
`
`8.
`
`9.
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`
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