1、 Recommendation ITU-R M.2003-2 (01/2018) Multiple Gigabit Wireless Systems in frequencies around 60 GHz M Series Mobile, radiodetermination, amateur and related satellite services ii Rec. ITU-R M.2003-2 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficien
2、t and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are pe
3、rformed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Form
4、s to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be
5、 found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile,
6、 radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum managem
7、ent SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2018 ITU 2018 All rights reserved. No part o
8、f this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R M.2003-2 1 RECOMMENDATION ITU-R M.2003-2 Multiple Gigabit Wireless Systems in frequencies around 60 GHz (Question ITU-R 212-3/5) (2012-2015-2018) Scope This Recommendation provides general ch
9、aracteristics and radio interface standards for Multiple Gigabit Wireless Systems in frequencies around 60 GHz. Keywords MGWS, WLAN, RLAN, Wireless Local Access, Networks, Radio Local Area Networks, Close Proximity Mobile System (CPMS) The ITU Radiocommunication Assembly, considering a) that Multipl
10、e Gigabit Wireless Systems (MGWS) are widely used for fixed, semi-fixed (transportable) and portable computer equipment for a variety of broadband applications; b) that MGWS are expected to encompass applications for wireless digital video, audio, and control applications, as well as multiple gigabi
11、t wireless local area networks (WLAN) and point-to-point close proximity mobile system; c) that MGWS standards have been developed for operation in the 60 GHz frequency range; d) that MGWS should be implemented with careful consideration to compatibility with other radio applications; e) that many a
12、dministrations permit MGWS including radio local area networks (RLANs) and personal area networks (WPANs) devices to operate in the 60 GHz frequency range on a license-exempt basis; f) that harmonized frequencies in the 60 GHz frequency range for the mobile service would facilitate the introduction
13、of MGWS including RLANs, recognizing a) that both consumers and manufacturers will benefit from global harmonization of the 60 GHz spectrum for MGWS; b) that although MGWS systems have been predominantly used for indoor applications there are administrations which allow outdoor use of these systems,
14、 noting that several standards provide options for MGWS implementation, recommends that the MGWS standards and their system characteristics contained in Annex 1 should be used. 2 Rec. ITU-R M.2003-2 Annex 1 General characteristics of 60 GHz Multiple Gigabit Wireless Systems 1 Overview Multiple Gigab
15、it Wireless System (MGWS) radiocommunication networks can be used in short-range, line-of-sight and non-line-of-sight circumstances with traditional WLAN topologies. MGWS systems can also be used in very short range high rate proximity communications where the radio range is a few centimetres with d
16、evices pairing point-to-point in close proximity of each other. For WLAN, total communication range and performance will vary depending on system design (e.g. number of antenna elements) as well as the environment, but multiple gigabit performance is typically expected at ranges around 10 m for in-r
17、oom use when devices typically possess a few ( 3) dozen antenna elements, to a few hundred meters for outdoor use when devices can be equipped with several ( 6) dozen antenna elements. These networks can be deployed with an access point as in existing WLAN deployments or without such an infrastructu
18、re such as in both WLAN in ad hoc mode and wireless personal area network (WPAN). For close proximity communication topology is a pair of devices (also known as a pairnet) with performance up to 100 Gbits is expected with range of 10 cm or less (devices nearly touching) with transient connections (r
19、apid setup and teardown); Close proximity devise typically will use a single antenna element and very low transmit power. When access points are used, they are mounted indoor with service covering home or an office space with a nomadic user terminal typically also used indoor, i.e. the entire WLAN s
20、ystem would be used in indoor environment. To provide longer ranges and better capacity, the access point is typically equipped with a larger number of antenna elements than the user terminals. When access points are not used, MGWS devices are allowed to communicate by setting up direct links for da
21、ta exchange between the devices/equipment. Typical applications include equipment to equipment (e.g. laptop to projector) and a consumer electronics (CE) device to a kiosk1, and it may be assumed that usage would predominantly be indoors. In some application, nomadic devices connect with stationary
22、devices (i.e. kiosk, doorway, turnstile, vending machine) for very short duration to transfer large amounts of data, e.g. download 2 hours of HD video content in 250 ms while passing through an entry turnstile at a train station or airport. For the close proximity applications, a high density of dev
23、ices and users may be concentrated in a small space, for example when passing through the entry ticket gates2 at train station or airport. 2 Technical characteristics of MGWS 2.1 Spectrum A minimum of 7 GHz contiguous spectrum in the 57-71 GHz is needed to satisfy the requirements3 of the applicatio
24、ns envisioned to be used in this spectrum, such as uncompressed video (e.g. high 1 In this context, a kiosk is a booth providing distribution of, and providing access to, electronic content such as movies, music, video, e-books, etc. 2 In this context, an entry ticket gate has both fare-paying and l
25、arge-file downloading functions and it is used at railway and subway stations. The large-file contents are video, movies. etc. 3 System requirements are provided in the standards contained in Annex 1. Rec. ITU-R M.2003-2 3 definition multimedia interface (HDMI) at 3 Gbit/s), wireless docking, wirele
26、ss networking, and rapid download/upload. This would allow up to six channels for flexibility and improved connectivity. Furthermore, for single channels, a channel bandwidth of 2 160 MHz allows simpler modulation schemes to achieve multi-Gbit/s data rates, which is suitable for adoption by low powe
27、r devices such as smartphones, tablets, netbook and notebook PCs. If single channels are bonded to achieve greater capacity, the bandwidth is defined as an integer multiple of 2 160 MHz to enable coexistence with 2 160 MHz systems. 2.2 Channel bandwidth and centre frequencies A 2 160 MHz channel ban
28、dwidth is required for single channels and bonding of single channels are allowed. It is important that MGWS standards employ the same channelization in order to promote better coexistence. Centre frequencies for single channels are recommended to be at 58.32, 60.48, 62.64, 64.80 GHz, 66.96 GHz, and
29、 69.12 GHz. For bonded channels, centre frequencies depend on how many single channels are bonded, but need to be uniformly spaced with respect to the single channel centre frequencies. 2.3 Transmit mask The following mask is applicable to single channel operation. FIGURE 1 Spectral mask for single
30、channel operation M 2003 1. -0 0 d B r32 d B r2 d B r170 . 9 4 1 . 2 3 . 0 62. 7 0 . 9 4 1 . 2 3 . 0 6 2. 7 ( f f ) G H zcIn Fig. 1 above, fc is the carrier centre frequency. The following mask (Fig. 2 and Table 1) is applicable when channel bonding of more than one contiguous channel is used. 4 Rec
31、. ITU-R M.2003-2 FIGURE 2 Spectral mask for more than one contiguous channel with channel bonding M 2003 2. -0 2 5 d B r 3 0 d B rf4f fc 2 0 d B rPS D (d B r)0 d B rf3f2f10f1f2f3f4TABLE 1 Transmit spectral mask parameters Channel bonding f1 (GHz) f2 (GHz) f3 (GHz) f4 (GHz) Two-bonded channel transmi
32、ssion 2.100 2.160 3.000 4.000 Three-bonded channel transmission 3.150 32.40 4.500 6.000 Four-bonded channel transmission 4.200 4.320 6.000 8.000 Alternative spectrum mask (Fig. 3 and Tables 2 and 3) is applicable when channel bonding of more than one contiguous channel is used. FIGURE 3 Alternative
33、power spectral density mask for channel bonded operation M 2003. - 0 3f fc d B r17P S D (d B r)0 d B rf3f2f1f1f2f3 d B r30Rec. ITU-R M.2003-2 5 TABLE 2 Relative limit value of transmit power spectral density mask for channel bonded operation Frequency Relative limit (dBr) 1| fff c 0 12 | ffff c )/()
34、|(|17 121 fffff c 23 | ffff c )/()|(|1317 232 fffff c |3 cfff 30 TABLE 3 Transmit power spectral density mask parameters Channel bonding f1 (GHz) f2 (GHz) f3 (GHz) Two-bonded channel 1.880 2.400 4.000 Three-bonded channel 2.820 3.600 6.000 Four-bonded channel 3.760 4.800 8.000 2.4 Common characteris
35、tics 2.4.1 Transmit and receive operating temperature range Transmit and receive operating temperature range follows IEEE Std 802.11-2016. 2.4.2 Centre frequency tolerance The transmitter centre frequency tolerance should be 20 ppm maximum for the 60 GHz band. 2.4.3 Symbol clock tolerance The symbol
36、 clock frequency tolerance should be 20 ppm maximum for the 60 GHz band. The transmit centre frequency and the symbol clock frequency are derived from the same reference oscillator. 2.4.4 Transmit centre frequency leakage The transmitter centre frequency leakage should not exceed 23 dB relative to t
37、he overall transmitted power, or, equivalently, 2.5 dB relative to the average energy of the rest of the subcarriers (in orthogonal frequency division multiplexing (OFDM). 2.4.5 Transmit ramp up and ramp down The transmit power-on ramp is defined as the time it takes for a transmitter to rise from l
38、ess than 10% to greater than 90% of the average power to be transmitted in the frame. The transmit power-on ramp should be around 10 ns. The transmit power-down ramp is defined as the time it takes the transmitter to fall from greater than 90% to less than 10% of the maximum power to be transmitted
39、in the frame. The transmit power-down ramp should be around 10 ns. 6 Rec. ITU-R M.2003-2 2.4.6 Maximum input level The receiver maximum input level is the maximum power level of the incoming signal, in dBm, present at the input of the receiver for which the error rate criterion (defined at the RX se
40、nsitivity section) is met. A compliant receiver has a receiver maximum input level at the receive antenna(s) of at least 10 microwatts/cm2 for each of the modulation formats that the receiver supports. 2.4.7 System characteristics To exploit the full potential that MGWS can provide including the sup
41、port of the applications and services described herein, certain system level characteristics need to be satisfied: 1) Throughput: every MGWS device that supports not more than a single channel operation should provide a means of achieving a maximum throughput, as measured at the top of the medium ac
42、cess control layer, of at least 1 Gbit/s data rate. If the MGWS device supports bonded channel operation, the throughput should scale linearly with the number of bonded channels. 2) Range: WLAN systems should provide a means of achieving a range of at least 10 m at 1 Gbit/s, as measured at the top o
43、f the medium access control layer, in some NLoS PHY channel conditions. For WPAN and CPMS, systems range should typically be less than 10 cm to achieve high spectrum re-use. In addition to the aforementioned characteristics, when the system supports uncompressed video streaming further characteristi
44、cs described in Table 4 need to be met. TABLE 4 System characteristics Parameter Value Description Rate 3 Gbit/s Uncompressed video, 1 080 p (RGB): 1 920 1 080 pixels, 24 bits/pixels, 60 frames/s Packet loss rate (8 kbyte payload) 1e-8 Delay4 10 ms 2.4.8 Channel access schemes The basic access schem
45、e is time division multiple access (TDMA), which is necessary to deal with the challenges of operation in 60 GHz, the directional nature of communication, and applications such as wireless display. TDMA can provide the necessary bandwidth guarantee to applications sensitive to quality of service giv
46、en its reservation characteristics while being power efficient since devices do not need to stay awake when not communicating. In addition, since TDMA is scheduled, stations know exactly to which other station they will communicate to and when, hence are able to steer the main lobe of their antenna
47、towards the intended destination and obviate the need for omnidirectional communication needed for contention-based access. Contention-based access, such as provided by in Wi-Fi, should also be supported for usages including web browsing and file transfer. However, instead of being the basic access
48、scheme, 4 This represents delay from top of MAC layer in one end to the top of MAC layer at the other end. Rec. ITU-R M.2003-2 7 contention-based access should be used within periods of time allocated in the TDMA channel access infrastructure. 2.5 Parameters for coexistence For improved coexistence,
49、 it is important that all MGWS utilize the same channelization. Examples of channelization: 1) IEEE: a) IEEE Std 802.11-20165 defines a channel bandwidth of 2 160 MHz. b) IEEE Std 802.15.3-20166 defines a channel bandwidth of 2 160 MHz. c) IEEE Std 802.15.3e-20177 defines a channel bandwidth of 2 160 MHz with bonding of up to four channels Prior to starting operation on a channel, a MGWS should scan the channel in an attempt to ensure that its operation will not cause interference to other MGWS operating on that channel. Examples of in
