1、 ETSI EN 301 893 V1.8.1 (2015-03) Broadband Radio Access Networks (BRAN); 5 GHz high performance RLAN; Harmonized EN covering the essential requirements of article 3.2 of the R Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI
2、Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the update
3、s on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Harmonized European Standard (EN) has been produced by ETSI Technical Committee Broadband Radio Access Networks (BRAN). The present document has been produced by ETSI in response to mandat
4、e M/284 issued from the European Commission under Directive 98/34/EC i.3 as amended by Directive 98/48/EC i.1. The title and reference to the present document are intended to be included in the publication in the Official Journal of the European Union of titles and references of Harmonized Standard
5、under the Directive 1999/5/EC 1. The requirements relevant to Directive 1999/5/EC 1 are summarized in annex A. National transposition dates Date of adoption of this EN: 20 March 2015 Date of latest announcement of this EN (doa): 30 June 2015 Date of latest publication of new National Standard or end
6、orsement of this EN (dop/e): 31 December 2015 Date of withdrawal of any conflicting National Standard (dow): 31 December 2016 Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted
7、as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. Introduction The present document is part of a set of standards developed by ETSI and is designed to
8、fit in a modular structure to cover all radio and telecommunications terminal equipment within the scope of the R Uncertainties in the measurement of mobile radio equipment characteristics; Part 1“. 3 ETSI TR 100 028-2 (V1.4.1) (12-2001): “Electromagnetic compatibility and Radio spectrum Matters (ER
9、M); Uncertainties in the measurement of mobile radio equipment characteristics; Part 2“. 4 Void. 5 ECC/DEC/(04)08: ECC Decision of 9 July 2004 on the harmonised use of the 5 GHz frequency bands for the implementation of Wireless Access Systems including Radio Local Area Networks (WAS/RLANs) (30/10/2
10、009). 6 Commission Decision 2005/513/EC of 11 July 2005 on the harmonised use of radio spectrum in the 5 GHz frequency band for the implementation of Wireless Access Systems including Radio Local Area Networks (WAS/RLANs). ETSI ETSI EN 301 893 V1.8.1 (2015-03) 9 7 Commission Decision 2007/90/EC of 1
11、2 February 2007 amending Decision 2005/513/EC on the harmonised use of radio spectrum in the 5 GHz frequency band for the implementation of Wireless Access Systems including Radio Local Area Networks (WAS/RLANs). 8 IEEE Std. 802.11-2012: “IEEE Standard for Information Technology - Telecommunications
12、 and information exchange between systems - Local and metropolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications“. 9 IEEE Std. 802.11ac-2013: “IEEE Standard for Information Technology - Telecommunications and informa
13、tion exchange between systems - Local and metropolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications - Amendment 4: Enhancements for Very High Throughput for Operation in Bands below 6 GHz“. 10 ETSI TR 102 273-2 (V1.
14、2.1) (12-2001): “Electromagnetic compatibility and Radio spectrum Matters (ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the corresponding measurement uncertainties; Part 2: Anechoic chamber“. 11 ETSI TR 102 273-3 (V1.2.1) (12-2001): “Electromagnetic compat
15、ibility and Radio spectrum Matters (ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the corresponding measurement uncertainties; Part 3: Anechoic chamber with a ground plane“. 12 ETSI TR 102 273-4 (V1.2.1) (12-2001): “Electromagnetic compatibility and Radio s
16、pectrum Matters (ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the corresponding measurement uncertainties; Part 4: Open area test site“. 2.2 Informative references References are either specific (identified by date of publication and/or edition number or v
17、ersion number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI canno
18、t guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 Directive 98/48/EC of the European Parliament and of the Council of 20 July 1998 amending Dire
19、ctive 98/34/EC laying down a procedure for the provision of information in the field of technical standards and regulations. i.2 ETSI EG 201 399 (V2.1.1): “Electromagnetic compatibility and Radio spectrum Matters (ERM); A guide to the production of candidate Harmonized Standards for application unde
20、r the R provide on aggregate a near-uniform loading of the spectrum (Uniform Spreading). The DFS function as described in the present document is not tested for its ability to detect frequency hopping radar signals. Whilst the DFS function described in this clause defines conditions under which the
21、equipment may transmit, transmissions are only allowed providing they are not prohibited by the Adaptivity requirement in clause 4.8. 4.7.1.2 Applicable frequency range Radar detection is required when operating on channels whose nominal bandwidth falls partly or completely within the frequency rang
22、es 5 250 MHz to 5 350 MHz or 5 470 MHz to 5 725 MHz. This requirement applies to all types of RLAN devices regardless of the type of communication between these devices. Uniform Spreading is required across the frequency ranges 5 150 MHz to 5 350 MHz and 5 470 MHz to 5 725 MHz. Uniform Spreading is
23、not applicable for equipment that only operates in the band 5 150 MHz to 5 250 MHz. 4.7.1.3 DFS operational modes Within the context of the operation of the DFS function, an RLAN device shall operate as either a master or a slave. RLAN devices operating as a slave shall only operate in a network con
24、trolled by an RLAN device operating as a master. A device which is capable of operating as either a master or a slave shall comply with the requirements applicable to the mode in which it operates. Some RLAN devices are capable of communicating in ad-hoc manner without being attached to a network. R
25、LAN devices operating in this manner on channels whose nominal bandwidth falls partly or completely within the frequency ranges 5 250 MHz to 5 350 MHz or 5 470 MHz to 5 725 MHz shall employ DFS and shall be tested against the requirements applicable to a master. Slave devices used in fixed outdoor p
26、oint to point or fixed outdoor point to multipoint applications shall behave as slave with radar detection independent of their output power. See table 5. 4.7.1.4 DFS operation The operational behaviour and individual DFS requirements that are associated with master and slave devices are as follows:
27、 Master devices: a) The master device shall use a Radar Interference Detection function in order to detect radar signals. The master device may rely on another device, associated with the master, to implement the Radar Interference Detection function. In such a case, the combination shall comply wit
28、h the requirements applicable to a master. ETSI ETSI EN 301 893 V1.8.1 (2015-03) 19 b) A master device shall only start operations on Available Channels. At installation (or reinstallation) of the equipment, the RLAN is assumed to have no Available Channels within the band 5 250 MHz to 5 350 MHz and
29、/or 5 470 MHz to 5 725 MHz. In such a case, before starting operations on one or more of these channels, the master device shall perform either a Channel Availability Check or an Off-Channel CAC to ensure that there are no radars operating on any selected channel. If no radar has been detected, the
30、channel(s) becomes an Available Channel(s) and remains as such until a radar signal is detected during the In-Service Monitoring. The Channel Availability Check or the Off-Channel CAC may be performed over a wider bandwidth such that all channels within the tested bandwidth become Available Channels
31、. NOTE 1: The initial Channel Availability Check may be activated manually at installation or reinstallation of the equipment. c) Once the RLAN has started operations on an Available Channel, then that channel becomes an Operating Channel. During normal operation, the master device shall monitor all
32、 Operating Channels (In-Service Monitoring) to ensure that there is no radar operating within these channel(s). If no radar was detected on an Operating Channel but the RLAN stops operating on that channel, then the channel becomes an Available Channel. NOTE 2: An RLAN is allowed to start transmissi
33、ons on multiple (adjacent or non-adjacent) Available Channels. In this case all these channels become Operating Channels. d) If the master device has detected a radar signal on an Operating Channel during In-Service Monitoring, the master device shall instruct all its associated slave devices to sto
34、p transmitting on this channel which becomes an Unavailable Channel. When operating on multiple (adjacent or non-adjacent) Operating Channels simultaneously, only the Operating Channel containing the frequency on which radar was detected shall become an Unavailable Channel. e) An Unavailable Channel
35、 can become a Usable Channel again after the Non-Occupancy Period. A new Channel Availability Check or an Off-Channel CAC is required to verify there is no radar operating on this channel before it becomes an Available Channel again. f) In all cases, if radar detection has occurred, then the channel
36、 containing the frequency on which radar was detected becomes an Unavailable Channel. Alternatively, the channel may be marked as an Unusable Channel. Slave devices: a) A slave device shall not transmit before receiving an appropriate enabling signal from an associated master device. b) A slave devi
37、ce shall stop its transmissions on a channel whenever instructed by a master device. The slave device shall not resume any transmissions on this channel until it has received an appropriate enabling signal from an associated master device. c) A slave device which is required to perform radar detecti
38、on (see table D.2, note 2), shall stop its own transmissions on an Operating Channel if it has detected a radar on that channel. That Operating Channel becomes an Unavailable Channel for the slave device. It shall not resume any transmissions on this Unavailable Channel for a period of time equal to
39、 the Non-Occupancy Period. A Channel Availability Check or an Off-Channel CAC is required by the slave device to verify there is no radar operating on this channel before the slave may use it again. 4.7.2 DFS technical requirements specifications 4.7.2.1 Applicability Table 5 lists the DFS related t
40、echnical requirements and their applicability for every operational mode. If the RLAN device is capable of operating in more than one operational mode then every operating mode shall be assessed separately. ETSI ETSI EN 301 893 V1.8.1 (2015-03) 20 Table 5: Applicability of DFS requirements Requireme
41、nt DFS Operational mode Master Slave without radar detection (see table D.2, note 2) Slave with radar detection (see table D.2, note 2) Channel Availability Check check Not required check (see note 2) Off-Channel CAC (see note 1) check Not required check (see note 2) In-Service Monitoring check Not
42、required check Channel Shutdown check check check Non-Occupancy Period check Not required check Uniform Spreading check Not required Not required NOTE 1: Where implemented by the manufacturer. NOTE 2: A slave with radar detection is not required to perform a CAC or Off-Channel CAC at initial use of
43、the channel but only after the slave has detected a radar signal on the Operating Channel by In-Service Monitoring. The radar detection requirements specified in clauses 4.7.2.2 to 4.7.2.4 assume that the centre frequencies of the radar signals fall within the central 80 % of the Occupied Channel Ba
44、ndwidth of the RLAN channel (see clause 4.3). 4.7.2.2 Channel Availability Check 4.7.2.2.1 Definition The Channel Availability Check (CAC) is defined as a mechanism by which an RLAN device checks channels for the presence of radar signals. This mechanism is used for identifying Available Channels. T
45、here shall be no transmissions by the RLAN device on the channels being checked during this process. If no radars have been detected on a channel, then that channel becomes an Available Channel. For devices that support multiple Nominal Channel Bandwidths, the Channel Availability Check may be perfo
46、rmed once using the widest Nominal Channel Bandwidth. All narrower channels within the tested bandwidth become Available Channels providing no radar was detected. 4.7.2.2.2 Limit The Channel Availability Check shall be performed during a continuous period in time (Channel Availability Check Time) wh
47、ich shall not be less than the value defined in table D.1. During the Channel Availability Check, the RLAN device shall be capable of detecting any of the radar test signals that fall within the ranges given by table D.4 with a level above the Radar Detection Threshold defined in table D.2. The mini
48、mum required detection probability is defined in table D.5. 4.7.2.2.3 Conformance Conformance tests for this requirement are defined in clause 5.3.8. 4.7.2.3 Off-Channel CAC (Off-Channel Channel Availability Check) 4.7.2.3.1 Definition Off-Channel CAC is defined as an optional mechanism by which an
49、RLAN device monitors channel(s), different from the Operating Channel(s), for the presence of radar signals. The Off-Channel CAC may be used in addition to the Channel Availability Check defined in clause 4.7.2.2, for identifying Available Channels. Off-Channel CAC is performed by a number of non-continuous checks spread over a period in time. This period, which is required to determine the presence of radar signals, is defined as the Off-Channel CAC Time. If no radars have been detected in a channel, then that channel becomes an Available Channel. ETSI ETS
