EN 301893: 2017 - 5GHz无线访问系统技术规范与测试方法

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EN 301893:2017 是一项由欧洲电信标准化协会 (ETSI) 制定并发布的标准化文档，它专注于5 GHz无线接入系统（WAS），特别是针对5 GHz RLAN（无线局域网络）设备的技术特征和测量方法。该标准与欧盟2014/53/EU指令的第3.2条基本要求相一致，旨在规范和协调5 GHz频谱的使用，以支持与其他设备的频谱共享。该标准规定了对于5 GHz无线网络设备的性能要求，包括但不限于数据传输速率、信号质量、功率等级、频谱效率和干扰管理等方面。在第一层（Layer 1）技术层面，它可能涵盖了物理层的标准，如调制方式、编码、信道结构和协议规范，确保设备之间的互操作性和安全性。 "5GHz RLAN"部分强调了5 GHz频段在无线局域网络中的应用，这在当今的无线办公环境和智能家居等场景中具有重要意义，因为5 GHz频段提供了较高的数据传输速率和较低的干扰，适合于对速度和容量有高需求的应用。此外，EN 301893还包含了关于接入技术、宽带通信、频谱监管和测试方法的描述，确保所有符合标准的设备能够顺利接入网络，并在满足法规要求的同时，进行有效的性能测试和验证。对于用户而言，这意味着在购买和部署5 GHz RLAN设备时，必须确保它们符合EN 301893的标准，以便于与其他设备无缝协作并避免潜在的合规问题。最后，文档指出用户可以从ETSI官方网站下载最新版本，并强调了电子版和打印版的版权保护，所有改动必须得到ETSI的书面授权。标准的电子版和打印版可能存在差异，但只有PDF格式的打印版存储在特定的ETSISecretariat网络驱动器上，被认定为最终权威版本。 EN 301893:2017是IT行业中关于5 GHz RLAN技术的重要指导性标准，对于网络服务提供商、设备制造商以及政策制定者来说，理解和遵循这一标准是确保网络服务质量、提升效率和促进技术创新的关键。

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ETSI

Final draft ETSI EN 301 893 V2.1.0 (2017

03)

During a Channel Occupancy Time (COT), equipment may operate temporarily with an Occupied Channel Bandwidth

of less than 80 % of its Nominal Channel Bandwidth with a minimum of 2 MHz.

4.2.2.3 Conformance

Conformance tests as defined in clause 5.4.3 shall be carried out to determine the Occupied Channel Bandwidth.

4.2.3 RF output power, Transmit Power Control (TPC) and Power Density

4.2.3.1 Definitions

4.2.3.1.1 RF Output Power

The RF Output Power is the mean equivalent isotropically radiated power (e.i.r.p.) during a transmission burst.

4.2.3.1.2 Transmit Power Control (TPC)

Transmit Power Control (TPC) is a mechanism to be used by the RLAN device to ensure a mitigation factor of at least

3 dB on the aggregate power from a large number of devices. This requires the RLAN device to have a TPC range from

which the lowest value is at least 6 dB below the values for mean e.i.r.p. given in table 2 for devices with TPC.

4.2.3.1.3 Power Density

The Power Density is the mean equivalent isotropically radiated power (e.i.r.p.) density during a transmission burst.

4.2.3.2 Limits

4.2.3.2.1 General

The limits below are applicable to the system as a whole and in any possible configuration. This means that the antenna

gain of the integral or dedicated antenna has to be taken into account as well as the additional (beamforming) gain in

case of smart antenna systems (devices with multiple transmit chains).

In case of multiple (adjacent or non-adjacent) channels within the same sub-band, the total RF Output Power of all

channels in that sub-band shall not exceed the limits defined in table 2 and table 3.

In case of multiple, non-adjacent channels operating in separate sub-bands, the total RF Output Power in each of the

sub-bands shall not exceed the limits defined in table 2 and table 3.

4.2.3.2.2 Limits for RF output power and Power Density at the highest power level

TPC is not required for channels whose nominal bandwidth falls completely within the band 5 150 MHz to 5 250 MHz.

For devices with TPC, the RF output power and the Power Density when configured to operate at the highest stated

power level (P

) of the TPC range shall not exceed the levels given in table 2.

Devices are allowed to operate without TPC. See table 2 for the applicable limits that shall apply in this case.

ETSI

Final draft ETSI EN 301 893 V2.1.0 (2017

03)

Table 2: Mean e.i.r.p. limits for RF output power and Power Density at the highest power level (P

)

Frequency

range

(MHz)

Mean

e.i.r.p.

limit

for

(dBm)

Mean

e.i.r.p.

density limit

(dBm/MHz)

with

TPC

without

TPC

with

TPC

without

TPC

5 150 to 5 350 23 20/23 (see note 1) 10 7/10 (see note 2)

5 470 to 5 725 30 (see note 3) 27 (see note 3) 17 (see note 3) 14 (see note 3)

NOTE 1: The applicable limit is 20 dBm, except for transmissions whose nominal bandwidth falls

completely within the band 5 150 MHz to 5 250 MHz, in which case the applicable limit is

23 dBm.

NOTE 2: The applicable limit is 7 dBm/MHz, except for transmissions whose nominal bandwidth falls

completely within the band 5 150 MHz to 5 250 MHz, in which case the applicable limit is

10 dBm/MHz.

NOTE 3: Slave devices without a Radar Interference Detection function shall comply with the limits for the

frequency range 5 250 MHz to 5 350 MHz.

4.2.3.2.3 Limit for RF output power at the lowest power level (P

) of the TPC range

For devices using TPC, the RF Output Power during a transmission burst when configured to operate at the lowest

stated power level (P

) of the TPC range shall not exceed the levels given in table 3. For devices without TPC, the

limits in table 3 do not apply.

Table 3: Mean e.i.r.p. limits for RF Output Power

at the lowest power level of the TPC range

Frequency range

Mean

e.i.r.p.

(

dBm

)

limit for

5 250 MHz to 5 350 MHz 17

5 470 MHz to 5 725 MHz 24 (see note)

NOTE: Slave devices without a Radar Interference Detection function

shall comply with the limits for the band 5 250 MHz to 5 350 MHz.

4.2.3.3 Conformance

Conformance tests as defined in clause 5.4.4 shall be carried out.

4.2.4 Transmitter unwanted emissions

4.2.4.1 Transmitter unwanted emissions outside the 5 GHz RLAN bands

4.2.4.1.1 Definition

Transmitter unwanted emissions outside the 5 GHz RLAN bands are radio frequency emissions outside the 5 GHz

RLAN bands defined in clause 3.1.

4.2.4.1.2 Limits

The level of transmitter unwanted emissions outside the 5 GHz RLAN bands shall not exceed the limits given in table 4.

In case of equipment with antenna connectors, these limits apply to emissions at the antenna port (conducted). For

emissions radiated by the cabinet or emissions radiated by integral antenna equipment (without antenna connectors),

these limits are e.r.p. for emissions up to 1 GHz and e.i.r.p. for emissions above 1 GHz.

ETSI

Final draft ETSI EN 301 893 V2.1.0 (2017

03)

In case of smart antenna systems (devices with multiple transmit chains) each of the transmit chains shall meet the

limits provided in figure 1.

For transmitter unwanted emissions within the 5 GHz RLAN bands, simultaneous transmissions in adjacent channels

may be considered as one signal with an actual Nominal Channel Bandwidth of "n" times the individual Nominal

Channel Bandwidth where "n" is the number of adjacent channels used simultaneously.

For simultaneous transmissions in multiple non-adjacent channels, the overall transmit spectral power mask is

constructed in the following manner. First, a mask as provided in figure 1 is applied to each of the channels. Then, for

each frequency point, the greatest value from the spectral masks of all the channels assessed shall be taken as the overall

spectral mask requirement at that frequency.

4.2.4.2.3 Conformance

Conformance tests as defined in clause 5.4.6 shall be carried out.

4.2.5 Receiver spurious emissions

4.2.5.1 Definition

Receiver spurious emissions are emissions at any frequency when the equipment is in receive mode.

4.2.5.2 Limits

The spurious emissions of the receiver shall not exceed the limits given in table 5.

In case of equipment with antenna connectors, these limits apply to emissions at the antenna port (conducted). For

emissions radiated by the cabinet or emissions radiated by integral antenna equipment (without antenna connectors),

these limits are e.r.p. for emissions up to 1 GHz and e.i.r.p. for emissions above 1 GHz.

Table 5: Spurious radiated emission limits

Frequency range

Maximum power

Measurement bandwidth

30 MHz to 1 GHz -57 dBm 100 kHz

1 GHz to 26 GHz -47 dBm 1 MHz

4.2.5.3 Conformance

Conformance tests as defined in clause 5.4.7 shall be carried out.

4.2.6 Dynamic Frequency Selection (DFS)

4.2.6.1 Introduction

4.2.6.1.1 General

An RLAN shall employ a Dynamic Frequency Selection (DFS) function to:

• detect interference from radar systems (radar detection) and to avoid co-channel operation with these systems;

• 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 equipment may transmit,

transmissions are allowed providing they are not prohibited by the Adaptivity requirement in clause 4.2.7.

ETSI

Final draft ETSI EN 301 893 V2.1.0 (2017

03)

4.2.6.1.2 DFS applicable frequency range

Radar detection shall be used when operating 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. 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 not applicable for equipment that only operates in the band 5 150 MHz to 5 250 MHz.

4.2.6.1.3 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 controlled 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. RLAN

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 point to point or fixed outdoor point to multipoint applications shall behave as slave

with radar detection independent of their output power. See table 6.

4.2.6.1.4 DFS operation

The operational behaviour and individual DFS requirements that are associated with master and slave devices are as

follows:

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 with the requirements applicable

to a master.

An RLAN network always has at least one RLAN device operating in master mode when operating in the

bands 5 250 MHz to 5 350 MHz and 5 470 MHz to 5 725 MHz.

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/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 channel(s) becomes an

Available Channel(s) and remains as such until a radar signal is detected during the In-Service Monitoring

after the channel became an Operating Channel. 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.

The initial Channel Availability Check may be activated manually at installation or reinstallation of the

equipment.

c) A master device may initiate a network by sending enabling signals to other RLAN (slave) devices. 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 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 by the In-Service Monitoring but the RLAN stops operating on that channel, then the channel

becomes again an Available Channel.

An RLAN is allowed to start transmissions on multiple (adjacent or non-adjacent) Available Channels. In this

case all these channels become Operating Channels.

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EN 301893: 2017 - 5GHz无线访问系统技术规范与测试方法

EN 301 893 v2.1.1

en_301893-CE 5G WIFI.pdf

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