1、 Recommendation ITU-R F.2005(03/2012)Radio-frequency channel and blockarrangements for fixed wirelesssystems operating in the 42 GHz(40.5 to 43.5 GHz) bandF SeriesFixed serviceii Rec. ITU-R F.2005 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and
2、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 performe
3、d 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. Forms to b
4、e 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 found
5、. 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, radio
6、determination, 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 management SN
7、G 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, 2012 ITU 2012 All rights reserved. No part of this
8、 publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R F.2005 1 RECOMMENDATION ITU-R F.2005 Radio-frequency channel and block arrangements for fixed wireless systems operating in the 42 GHz (40.5 to 43.5 GHz) band (Question ITU-R 247/5) (2012) Scope Th
9、is Recommendation provides radio-frequency channel arrangements for point-to-point (P-P) fixed wireless systems operating in the 42 GHz (40.5 to 43.5 GHz) band, which may be used for high, medium and low capacity systems. The preferred radio-frequency channel arrangements are based on multiples of b
10、asic channels of 7 MHz width merged to form higher channel widths up to 112 MHz. Additional option for block arrangement suitable for deployment of a variety of fixed wireless access (FWA) systems using multipoint technology as well as PP links for infrastructure and access purpose. Third option for
11、 a flexible mixed use of the above deployment methodology is also described. The ITU Radiocommunication Assembly, considering a) that the 40.5 to 43.5 GHz band is allocated worldwide to the fixed service on a primary basis; b) that in the Radio Regulations (RR) the 40.5 to 43.5 GHz band is identifie
12、d for high-density applications in the FS; c) that there is particular need for P-P links for large data capacity transport, e.g. for mobile networks applications, the deployment of which is expected to rapidly grow; d) that the deployment of P-P links may result in greater spectrum efficiency when
13、using conventional link-by-link coordination within a dedicated radio-frequency channel arrangement; e) that for the deployment of broadband services, it is most desirable to deploy in the 40.5 to 43.5 GHz band digital systems of high capacity, but need for medium and low capacity connection are not
14、 excluded; f) that multipoint (MP) systems (P-MP or MP-MP) can provide broadband fixed wireless access (BFWA) services in the range 40.5-43.5 GHz including telephony, video, media streaming and data services; g) that, in some cases, it may be desirable to achieve flexible frequency assignment plans
15、that can accommodate both FDD and TDD MP traffic requirements, as well as P-P links, in particular for transport applications in BFWA networks and in mobile networks; h) that, when the FS needs, synthesized in considering g), are dominant, sufficient capacity and flexibility for deployment of multip
16、le systems within a desired service area may be achieved by the aggregation of a variable number of contiguous frequency slots to form a block assignment; j) that the assignment of adjacent blocks to different BFWA operators may require setting general coexistence criteria in order to reduce the nee
17、d for coordination between them; but coordination should nevertheless be encouraged in order to maximize the efficient use of the blocks; 2 Rec. ITU-R F.2005 k) that with paired block assignment, both time division duplex (TDD) systems and frequency division duplex (FDD) MP systems could be indiffer
18、ently accommodated, provided that appropriate coexistence criteria can be met; l) that, in order to enhance the efficient use of the assigned block(s), according to present and future available technology, the operator should freely define and modify suitable channel arrangement(s) within the block(
19、s) according to the selected technology(ies); m) that when the higher spectrum efficiency of P-P links coordinated deployment within a channel arrangement and the higher flexibility of services permitted by a block assignment plan are both equally desirable, a flexible subdivision of the band betwee
20、n both methodologies is possible; n) that the radio astronomy service is also allocated with a primary status in the range 42.5-43.5 GHz; in some locations appropriate measures will be needed in the planning and deployment of MP BFWA and P-P systems around radio astronomy stations to protect the rad
21、io astronomy service, noting that the Radio Regulations identifies the 40.5 to 42 GHz band as being available in Region 2 also for high-density applications in the FSS and appropriate sharing should also be envisaged, recommends 1 that administrations wishing to use a radio-frequency channel arrange
22、ment for conventional coordinated deployment of P-P links in the 40.5-43.5 GHz frequency band should consider the radio-frequency channel arrangement in Annex 1; 2 that administrations wishing to adopt mixed and flexible use of different technologies, for both BFWA and P-P links, within the band sho
23、uld: 2.1 consider the guidance in Annex 2 when considering the positioning of assigned blocks within the band; 2.2 consider providing suitable measures for inter-block coexistence as well as for adjacent bands protection; 2.3 assign blocks in a manner that might assist future expansion of successful
24、 services, without further regulatory requirements on the actual channel arrangements inside the blocks; 3 that administrations wishing to adopt a flexible use of the band for both assignment methodologies, assigned P-P links according to recommends 1 and blocks of frequency according to recommends
25、2, should consider the use of flexible band subdivision in Annex 3; 4 that for international coordination purpose, it is necessary that neighbouring administrations commonly agree to select one of the two options presented in Annex 3. For this purpose, option A of Annex 3 is considered preferable wh
26、enever RAS coordination is required in the band 42.5-43.5 GHz because of the easiness coordination with P-P systems. Option B may be agreed when there are restrictions in using Option A. Rec. ITU-R F.2005 3 Annex 1 Radio-frequency channels arrangement according to recommends 1 Derivation of centre f
27、requency of radio-frequency channels The radio-frequency channel arrangement for carrier separations of 112 MHz, 56 MHz, 28 MHz, 14 MHz and 7 MHz, with duplex spacing 1 500 MHz, shall be derived as follows: Let fo be the reference frequency = 42 000 MHz; fnbe the centre frequency of an RF channel in
28、 the lower half of the band (MHz); fnbe the centre frequency of an RF channel in the upper half of the band (MHz); then the frequencies of individual channels are expressed by the following relationships: a) for systems with a carrier spacing of 112 MHz: lower half of band: fn = fo 1 506 + 112 n MHz
29、 upper half of band: fn= fo 6 + 112 n MHz where: n = 1, 2, 3, ., 12 b) for systems with a carrier spacing of 56 MHz: lower half of band: fn= fo 1 478 + 56 n MHz upper half of band: fn = fo + 22 + 56 n MHz where: n = 1, 2, 3, ., 25 c) for systems with a carrier spacing of 28 MHz: lower half of band:
30、fn= fo 1 464 + 28 n MHz upper half of band: fn = fo + 36 + 28 n MHz where: n = 1, 2, 3, ., 50 In addition, the use of channel with index n = 0 may be considered with the agreement of the administrations concerned; d) for systems with a carrier spacing of 14 MHz: lower half of band: fn= fo 1 457 + 14
31、 n MHz upper half of band: fn = fo + 43 + 14 n MHz where: n = 1, 2, 3, ., 101 In addition, the use of channels with index n = 1 and 0 may be considered with the agreement of the administrations concerned; e) for systems with a carrier spacing of 7 MHz: lower half of band: fn= fo 1 453.5 + 7 n MHz up
32、per half of band: fn = fo+ 46.5 + 7 n MHz 4 Rec. ITU-R F.2005 where: n = 1, 2, 3, ., 202 In addition, the use of channels with index n = 3, 2, 1 and 0 may be considered with the agreement of the administrations concerned. TABLE 1 Calculated parameters according to Recommendation ITU-R F.746 XS (MHz)
33、 n f1(MHz) fn(MHz) f1(MHz) fn(MHz) Z1S (MHz) Z2S (MHz) YS (MHz) DS (MHz) 112 1, ., 12 40 606 41 838 42 106 43 338 106 162 268 1 500 56 1, ., 25 40 578 41 922 42 078 43 422 78 78 156 1 500 28 1, ., 50 40 564 41 936 42 064 43 436 64 64 128 1 500 14 1, ., 101 40 557 41 957 42 057 43 457 57 43 100 1 500
34、 7 1, ., 202 40 553.5 41 960.5 42 053.5 43 460.5 53.5 39.5 93 1 500 XS: separation between centre frequencies of adjacent channels. YS: separation between centre frequencies of the closest go and return channels. Z1S: separation between the lower band edge and the centre frequency of the lowest chan
35、nel in the lower sub-band. Z2S: separation between centre frequency of the highest channel in the upper sub-band and the upper band edge. DS: duplex spacing (nf fn). Rec. ITU-R F.2005 5 FIGURE 1 Occupied spectrum from 40.5 to 43.5 GHz F.2005-01Guard banda) 112 MHz channels50 MHz12 112 MHz channels15
36、6 MHz40.550 GHz 41.894 GHz 42.050 GHz12 112 MHz channels43.394 GHz106 MHzCentre gap Guard bandb) 56 MHz channels50 MHz 100 MHz 50 MHz25 56 MHz channels 25 56 MHz channelsc) 28 MHz channels50 MHz50 28 MHz channels100 MHz40.550 GHz 41.950 GHz 42.050 GHz50 28 MHz channels43.450 GHz50 MHzd) 14 MHz chann
37、els50 MHz 86 MHz 36 MHz101 14 MHz channels 101 14 MHz channelse) 7 MHz channels50 MHz202 7 MHz channels86 MHz40.550 GHz 41.964 GHz 42.050 GHz202 7 MHz channels43.464 GHz36 MHz40.500 GHz 43.500 GHzNote 28 MHz for additional 7, 14 and 28 MHz channels with the agreement of administrations concerned Not
38、eNoteNoteNoteNoteNote6 Rec. ITU-R F.2005 Annex 2 Guidance for the preferred construction of frequency blocks assignment plan for BFWA and P-P links according to recommends 2 Steps leading to a recommended assignment plan 1) Consider any constraints brought about by the need to share with other servi
39、ces. 2) Consider appropriate measure for inter-block coexistence as well as for adjacent bands protection. 3) Consider the appropriate block size, B for assignment. Although it is difficult to determine an absolute value for the optimum block size, considering the broadband nature of modern digital
40、BFWA or of the required P-P links, it is anticipated that blocks of at least 250 MHz would seem to be an appropriate starting point for consideration. However, a smaller granularity (e.g. in the order of 20/25 MHz or 28/56 MHz), when consistency is desired with the radio-frequency channel arrangemen
41、t in recommends 1, may assist in defining the proper sizes of the blocks. 4) Consider the following guidelines in order to develop an appropriate frequency block assignment plan: Paired equal blocks offset by 1.5 GHz should be assigned to each operator irrespective of the technology. For FDD systems
42、, the definition of a single duplex spacing for systems of 1 500 MHz is convenient for P-P systems, whilst allowing TDD, which may operate in both upper and lower sub-bands blocks. For a generic coexistence enhancing, in the case of deployment of FDD systems only the upper sub-band should be used fo
43、r the transmission from the terminals to the central station and the lower sub-band for the transmission from the central station to the terminals. If the entire band is not assigned, careful consideration should be given to the initial placement of operators to allow appropriate space for future ne
44、w or expanded assignments. Each block may contain a technology specific channelization scheme and guard bands. Figure 2 below gives an example scheme based on such principle where five different operators have been allocated different size of paired blocks. FIGURE 2 Example scheme based on the conce
45、pt of paired equal blocks F.2005-0240.5 GHz 41 GHz 41.5 GHz 42.5 GHz 43 GHz 43.5 GHz42 GHzOp A Op B Op C Op D Op E Op A Op B Op C Op D Op EBlock offset = 1 500 MHzRec. ITU-R F.2005 7 It provides administrations the possibility to allocate the spectrum without a need to predetermine the technology (e
46、ither for P-P or MP systems) to be used by the different operators and gives these latter the flexibility to deploy, mix or modify the technology they use: for FDD systems, it accommodates all systems with a duplex spacing of 1.5 GHz (see Fig. 3); for TDD systems (either P-P or MP), the two blocks a
47、re used separately by the operator to deploy same or different types of systems (see Fig. 4); a mixture of both FDD and TDD systems is possible either within blocks or in neighbouring blocks. FIGURE 3 Application with FDD P-P and P-MP systems (for one operator) F.2005-03Go (return)Downlink TxBlock o
48、ffset = 1 500 MHzBReturn (go)Uplink TxBFIGURE 4 Application with TDD systems (for one operator) F.2005-04Block offset = 1 500 MHzBBGo/RetD/UGo/RetD/UGo/RetD/UGo/RetD/UGo/RetD/UGo/RetD/UGo/RetD/UGo/RetD/UGo/RetD/U8 Rec. ITU-R F.2005 Annex 3 Flexible band segmentation, according to recommends 3, for j
49、oint use of block and radio-frequency channel arrangements A flexible joint use of the two methodologies described in recommends 1 and 2 may be obtained initiating the deployment of blocks (according to recommends 1) from the lowest frequency borders upwards and of coordinated P-P radio-frequency channels from the highest frequency borders downwards (option A, see Fig. 5) or vice versa (option B, see Fig. 6). FIGURE 5 Flexible deployment method: option A (preferred) F.2005-05Blocks assignmentsaccording recommends 240 500 MHzChannels arran
