1、 Recommendation ITU-R F.1497-2(02/2014)Radio-frequency channel arrangements for fixed wireless systems operating in the band 55.78-66 GHzF SeriesFixed serviceii Rec. ITU-R F.1497-2 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use o
2、f 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 performed by World and R
3、egional 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. Forms to be used for the s
4、ubmission 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 found. Series of ITU-
5、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, radiodetermination, a
6、mateur 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 management SNG Satellite news
7、 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, 2014 ITU 2014 All rights reserved. No part of this publication may
8、 be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R F.1497-2 1 RECOMMENDATION ITU-R F.1497-2 Radio-frequency channel arrangements for fixed wireless systems operating in the band 55.78-66 GHz (Question ITU-R 247/5) (2000-2002-2014) Scope This Recommendation specifi
9、es radio-frequency channel arrangements for fixed wireless systems (FWS) using TDD (time division duplex) or FDD (frequency division duplex) with channel separations of 3.5, 7, 14, 28, 30, 50 and 56 MHz in the range 55.78-66 GHz, the portions of which have been identified for use for high-density ap
10、plications in the fixed service (HDFS). Keywords Fixed service, radio-frequency channel arrangement, oxygen absorption, frequency division duplex (FDD), time division duplex (TDD), guard band. The ITU Radiocommunication Assembly, considering a) that the frequency range 55.78-66 GHz is allocated worl
11、dwide to the fixed service and to a number of other services sharing different portions of that band on a co-primary basis; b) that the bands 55.78-59 GHz and 64-66 GHz are as being available for high-density applications in the fixed service (FS); c) that in the frequency range 55.78-66 GHz high an
12、tenna directivity is achievable even with small size antenna, increasing the density of equipment and further reducing the risk of interference with the same and other radio services; d) that the propagation characteristics in this frequency range are significantly affected by additional attenuation
13、 due to oxygen absorption and, in particular, the central 57-64 GHz portion of the band exhibits the higher attenuation, which facilitate the deployment of a large number of short-range digital fixed links also in an uncoordinated manner; e) that ITU-R should develop radio-frequency channel arrangem
14、ents in order to make the most effective use of the spectrum available; f) that differing applications licensed by various administrations may require different radio-frequency channel arrangements; g) that the applications in this frequency range may require differing channel bandwidths; h) that se
15、veral radio services with various transmission signal characteristics and capacities may be in simultaneous use in this frequency range; j) that, due to different propagation behaviour and different sharing conditions, different portions of the whole 55.78-66 GHz may require different regulatory con
16、siderations for their use; k) that a high degree of compatibility between radio-frequency channels of different arrangements can be achieved by selecting channel centre frequencies within a homogeneous basic pattern, 2 Rec. ITU-R F.1497-2 recognizing that, in the band 55.78-56.26 GHz, in order to pr
17、otect stations in the Earth exploration-satellite service (passive), the maximum power density delivered by the transmitter to the antenna of a fixed service station is limited to 26 dB(W/MHz) in the Radio Regulations, noting a) that frequency division duplex (FDD) and time division duplex (TDD) sys
18、tems may be used simultaneously in the same geographical area providing sufficient measures are put in place to allow successful coordination; b) that the high additional attenuation due to oxygen absorption, effectively limits the achievable path length and interference level; c) that, also in abse
19、nce of coordination, equipment may listen for a free channel before transmission to recognize existing transmissions in order to minimize interference problems and to ensure continued operation of existing transmissions, recommends 1 that administrations should consider the channel arrangement given
20、 in Annex 1, 1 for TDD FS system deployment in the frequency range 55.78-57 GHz (see Note 1); 2 that administrations should consider the channel arrangement given in Annex 1, 2 for FDD FS system deployment in the frequency range 55.78-57 GHz (see Note 1); 3 that administrations wishing to implement
21、a specific radio-frequency plan should consider the channel arrangement given in Annex 2 for FS systems deployment, either FDD or TDD, in the frequency range 57-64 GHz (see Note 2); 4 that administrations wishing to implement a specific radio-frequency plan should consider the channel arrangements g
22、iven in Annex 3 for FS systems deployment, either FDD or TDD, in the frequency range 64-66 GHz; 5 that administrations may consider the channel arrangements in Annexes 2 and 3 for a combined use of the bands 57-64 GHz and 64-66 GHz utilizing a 50-MHz channel separation; 6 that the following Notes ar
23、e considered as part of this Recommendation. NOTE 1 The channel arrangements in Annex 1 provide the same centre frequencies for both TDD and FDD operation. NOTE 2 The channel arrangement in Annex 2 can also be used in any portion of the 57-64 GHz range, due to different national needs. Rec. ITU-R F.
24、1497-2 3 Annex 1 Radio-frequency channel arrangement in the band 55.78-57 GHz 1 For FS systems using TDD Let: frbe the reference frequency of 55 786 MHz fnbe the centre frequency of a radio-frequency channel in the band 55.78-57 GHz, then the centre frequencies of individual channels are expressed b
25、y the following relationships: a) for systems with a channel separation of 56 MHz: fn= fr+ 28 + 56 n MHz where: n = 1, 2, 3, . 20 b) for systems with a channel separation of 28 MHz: fn= fr+ 42 + 28 n MHz where: n = 1, 2, 3, . 40 c) for systems with a channel separation of 14 MHz: fn= fr+ 49 + 14 n M
26、Hz where: n = 1, 2, 3, . 80 d) for systems with a channel separation of 7 MHz: fn= fr+ 52.5 + 7 n MHz where: n = 1, 2, 3, . 160 e) for systems with a channel separation of 3.5 MHz: fn= fr+ 54.25 + 3.5 n MHz where: n = 1, 2, 3, . 320. 4 Rec. ITU-R F.1497-2 TABLE 1 Calculated parameters according to R
27、ecommendation ITU-R F.746 XS (MHz) n f1(MHz) fnmax(MHz) Z1S (MHz) Z2S (MHz) 56 1, . 20 55 870 56 934 90 6628 1, . 40 55 856 56 948 76 52 14 1, . 80 55 849 56 955 69 457 1, 160 55 845.5 56 958.5 65.5 41.5 3.5 1, 320 55 843.75 56 960.25 63.75 39.75 XS: separation between centre frequencies of adjacent
28、 channels Z1S: separation between the lower band edge and the centre frequency of the first channel Z2S: separation between centre frequencies of the final channel and the upper band edge. 2 For FS systems using FDD The radio-frequency channel arrangement for channel separations of 56 MHz, 28 MHz, 1
29、4 MHz, 7 MHz and 3.5 MHz shall be derived as follows: Let: frbe the reference frequency of 55 814 MHz fnbe the centre frequency (MHz) of the radio-frequency channel in the lower half of the band nf be the centre frequency (MHz) of the radio-frequency channel in the upper half of the band Tx/Rx separ
30、ation = 616 MHz band separation = 112 MHz then the frequencies (MHz) of individual channels are expressed by the following relationships: a) for systems with a channel separation of 56 MHz: lower half of the band: nf = fr+ 56 n upper half of the band: nf = fr+ 616 + 56 n where: n = 1, 2, 9 b) for sy
31、stems with a channel separation of 28 MHz: lower half of the band: nf = fr+ 14 + 28 n upper half of the band: nf = fr+ 630 + 28 n where: n = 1, 2, 3, 18 c) for systems with a channel separation of 14 MHz: lower half of the band: nf = fr+ 21 + 14 n Rec. ITU-R F.1497-2 5 upper half of the band: nf = f
32、r+ 637 + 14 n where: n = 1, 2, 3, 36 d) for systems with a channel separation of 7 MHz: lower half of the band: nf = fr+ 24.5 + 7 n upper half of the band: nf = fr+ 640.5 + 7 n where: n = 1, 2, 3, 72 e) for systems with a channel separation of 3.5 MHz: lower half of the band: nf = fr+ 26.25 + 3.5 n
33、upper half of the band: nf = fr+ 642.25 + 3.5 n where: n = 1, 2, 3, 144. TABLE 2 Calculated parameters according to Recommendation ITU-R F.746 XS (MHz) n f1(MHz) fnmax(MHz) 1f (MHz) nmaxf (MHz) Z1S (MHz) Z2S (MHz) YS (MHz) DS (MHz) 56 1, . 9 55 870 56 318 56 486 56 934 90 66 168 616 28 1, . 18 55 85
34、6 56 332 56 472 56 948 76 52 140 616 14 1, . 36 55 849 56 339 56 465 56 955 69 45 126 616 7 1, 72 55 845.5 56 342.5 56 461.5 56 958.5 65.5 41.5 119 616 3.5 1, 144 55 843.75 56 344.25 56 459.75 56 960.25 63.75 39.5 115.5 616 XS: separation between centre frequencies of adjacent channels YS: separatio
35、n between centre frequencies of the closest go and return channels Z1S: separation between the lower band edge and the centre frequency of the first channel Z2S: separation between centre frequencies of the final channel and the upper band edge DS: duplex spacing ).(nnff 6 Rec. ITU-R F.1497-2 Annex
36、2 Radio-frequency channel arrangement in the band 57-64 GHz This Annex gives basic frequency channel arrangements for both FDD and TDD applications. Let: frbe the reference frequency of 56 950 MHz fnbe the centre frequency of a radio-frequency channel in the band 57-59 GHz, then the centre frequenci
37、es of individual basic 50 MHz channel are expressed by the following relationship: fn= fr+ 25 + 50 n MHz where: n = 1, 2, 3, . 140. Figure 1 shows the basic channel arrangement. Wider channel operation, up to 2 500 MHz, either TDD or FDD, may be derived by basic channels aggregation. FDD duplex sepa
38、ration is not specifically identified; it may be either left free or defined at national level according to the needs. Channels n = 1, 2 may be considered as guard-band (GB) towards lower band 55.78-57 GHz (see Annex 1), possibly subject to different coordination conditions; in this case they should
39、 only be used for e.g. temporary purposes or equipment alignment and propagation tests. In the upper band edge, there is no need for guard band because the same system might appropriately operate also in the adjacent 64-66 GHz band. FIGURE 1 Basic channel arrangement 57-64 GHz Bands limits (GHz) (se
40、e Note 1) 57-59 59-63 63-64 50 MHz channel number 1 2 3 4 39404142 119 120 121 140 G B NOTE 1 The separation into three major frequency ranges is indicative only. Regulatory considerations at national level may differ. Based on these national considerations, the administrations may choose to deploy
41、radio systems within channels overlapping these boundaries as well as be paired within these bands. NOTE 2 Administrations may wish to combine the use of PP radio systems in the 57-64 GHz band with the 64-66 GHz band according to Annex 3 of this Recommendation. If circumstances allow, these radio sy
42、stems may also be deployed within a channel overlapping the boundary with the 57-64 GHz band as well as being paired within these bands. Different regulatory provisions between these bands are to be taken into account at national level. Rec. ITU-R F.1497-2 7 TABLE 3 Calculated parameters according t
43、o Recommendation ITU-R F.746 XS (MHz) n f1(MHz) f140(MHz) Z1S (MHz) Z2S (MHz) 50 1, . 140 57 025 63 975 25 25 XS: separation between centre frequencies of adjacent channels Z1S: separation between the lower band edge and the centre frequency of the first channel Z2S: separation between centre freque
44、ncies of the final channel and the upper band edge. Annex 3 Radio-frequency channel arrangements in the band 64-66 GHz This Annex gives examples of frequency channel arrangements for both FDD and TDD applications. The 30 MHz or 50 MHz basic channels for both types of applications can be aggregated t
45、o form larger blocks/channels as required by the national administration. Administrations may also wish to combine the use of point-to-point radio systems in the 64-66 GHz band with the contiguous 57-64 GHz band according to Annex 2 of this Recommendation. These radio systems may also be deployed wi
46、thin a channel overlapping the boundary with the 64-66 GHz band as well as being paired within this band, using either: a) a number of 30 MHz basic channels and the lower 10 MHz guard band from the arrangement of Fig. 3 or; b) a number of 50 MHz basic channels according to the arrangement of Fig. 6.
47、 It should be noted that the different amount of oxygen absorption in the 57-64 GHz band and in the 64-66 GHz band may suggest, at a national level, different regulatory provisions between these bands. 1 FDD and TDD arrangements with 30 MHz basic channels Let: frbe the reference frequency of 56 950
48、MHz; fnbe the centre frequency of a radio-frequency channel in the band 64-66 GHz, then the centre frequencies of individual channels are expressed by the following relationships: a) for FDD arrangements: fn= fr+ 7 045 + 30 n MHz fn= fr+ 8 035 + 30 n MHz where: n = 1, 2, 3, . 33 8 Rec. ITU-R F.1497-
49、2 b) for TDD arrangements: fn= fr+ 7 045 + 30 n MHz where: n = 1, 2, 3, . 66 Figure 2 shows the basic FDD arrangement consisting of 33 paired 30 MHz basic channels, which can be aggregated to form paired FDD channels/blocks consisting of several contiguous 30 MHz basic channels. FIGURE 2 Basic 30 MHz channels FDD arrangement 64-66 GHz (duplex separation: 990 MHz) 10 MHz 33 30 MHz channels 33 30 MHz channels 10 MHz 64000 64 01065 0006
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