1、 Recommendation ITU-R M.1768-1(04/2013)Methodology for calculation of spectrum requirements for the terrestrial component of International Mobile TelecommunicationsM SeriesMobile, radiodetermination, amateurand related satellite servicesii Rec. ITU-R M.1768-1 Foreword The role of the Radiocommunicat
2、ion Sector is to ensure the rational, equitable, efficient 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
3、 policy functions of the Radiocommunication Sector are performed 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/
4、ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms 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/
5、IEC and the ITU-R patent information database can also be 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 Br
6、oadcasting service (television) F Fixed service M Mobile, 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 fixe
7、d-satellite and fixed service systems SM Spectrum management 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 Publica
8、tion Geneva, 2013 ITU 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R M.1768-1 1 RECOMMENDATION ITU-R M.1768-1 Methodology for calculation of spectrum requirements for the terrestrial component of Interna
9、tional Mobile Telecommunications (2006-2013) Scope This Recommendation describes a methodology for the calculation of terrestrial spectrum requirement estimation for International Mobile Telecommunications (IMT). It provides a systematic approach that incorporates service categories (a combination o
10、f service type and traffic class), service environments (a combination of service usage pattern and teledensity), radio environments, market data analysis and traffic estimation by using these categories and environments, traffic distribution among radio access technique groups (RATGs), required sys
11、tem capacity calculation and resultant spectrum requirement determination. The methodology is applicable to packet switch-based traffic and can accommodate multiple services. It can also accommodate circuit switched emulation traffic using a reservation based concept. 1 Related Recommendations and R
12、eports Recommendation ITU-R M.1390 Methodology for the calculation of IMT-2000 terrestrial spectrum requirements. Recommendation ITU-R M.1457 Detailed specifications of the terrestrial radio interfaces of International Mobile Telecommunications-2000 (IMT-2000). Recommendation ITU-R M.1645 Framework
13、and overall objectives of the future development of IMT-2000 and systems beyond IMT-2000. Recommendation ITU-R M.2012 Detailed specifications of the terrestrial radio interfaces of International Mobile Telecommunications Advanced (IMT-Advanced). Report ITU-R M.2038 Technology trends. Report ITU-R M.
14、2072 World mobile telecommunication market forecast. Report ITU-R M.2074 Radio aspects for the terrestrial component of IMT-2000 and systems beyond IMT-2000. Report ITU-R M.2243 Assessment of the global mobile broadband deployments and forecasts for International Mobile Telecommunications. The ITU R
15、adiocommunication Assembly, considering a) that the radio access technique groups (RATGs) that are appropriate for IMT may have different channel bandwidth requirements, and hence varying impact on the basic frequency usage possibilities; b) that the methodology in Annex 1 is considered flexible eno
16、ugh to accommodate either a global view or the unique requirements of regional markets relative to terrestrial spectrum needs; c) that service functionalities in fixed, mobile and broadcasting networks are increasingly converging and interworking; 2 Rec. ITU-R M.1768-1 d) that the total telecommunic
17、ation market will be provided by various communication means in terms of services and networks according to Recommendations ITU-R M.1645, ITU-R M.1457 and ITU-R M.2012; dbis) that for the determination of spectrum requirements for IMT, new market requirements and network deployment scenarios have be
18、en developed and taken into account in Report ITU-R M.2243; e) that other delivery mechanisms can support some user applications in common and convey their traffic; f) that traffic distribution to those relevant other RATGs should be taken into account; g) that Resolution 233 (WRC-12) invites ITU-R
19、to study additional spectrum requirements for IMT; h) that hence the spectrum requirement should be calculated only for the RATGs that fall in the IMT; j) that a methodology for calculation of spectrum requirements for IMT should: i) accommodate the capabilities described in Recommendations ITU-R M.
20、1645, ITU-R M.1457 and ITU-R M.2012; ii) accommodate the complex mixture of services that will require differing bandwidths and quality of service, and significantly higher bit rates than IMT-2000; iii) be able to model systems consisting of multiple interworking networks, and have the flexibility t
21、o handle different combinations of RSTGs in different environments and the possibility that the up and downlinks of a service may be provisioned on different radio access techniques RATs; iv) use market data which is practical to collect as input to the traffic forecasts; v) have the flexibility to
22、handle both emerging technologies and enhancements to IMT; vi) take account of factors for practical network implementations; vii) produce results in a manner that is easily understandable and credible; viii) be implementable and verifiable within the available time-scales; ix) be suitable to be use
23、d during ITU-R meetings in terms of the computing facilities needed and the time required to perform an analysis; x) be no more complex than is justified by the uncertainty of the input data; xi) take into account improvements in spectrum efficiency due to the advances in technologies employed by en
24、hancements to IMT, recognizing a) that the majority of the traffic has changed from speech-oriented communications to multimedia communications; b) that networks and systems are designed to economically transfer packet data; c) that services become more diverse and it will be less valid to consider
25、simple peak traffic values that will apply across different environments, geographic areas and time, recommends 1 that administrations wishing to estimate spectrum requirements for the terrestrial component of IMT use the methodology contained in Annex 1. Rec. ITU-R M.1768-1 3 NOTE The methodology i
26、s a general one that can be used for differing markets, and for a range of cellular system architectures. Care should be exercised when choosing input parameters to reflect the requirements of particular countries or regions. Annex 1 1 Introduction In the past, estimation of spectrum requirements of
27、 wireless applications has been considered as a framework focusing on a single system and market scenario. With the advent of a convergence of mobile and fixed telecommunication and multi-network environments as well as supporting attributes like seamless interworking between different complementary
28、 access systems, as described in Recommendations ITU-R M.1645, ITU-R M.1457 and ITU-R M.2012, application of such a simple approach is no longer suitable. For the estimation of frequency requirements, new models have to be developed and applied, which allow for consideration of spatial and temporal
29、correlations among telecommunication services, taking into consideration the market requirements and network deployment scenarios. 2 Prerequisite information for application of the methodology 2.1 Forecast on services and market The starting point for all spectrum considerations concerning IMT are t
30、he market expectations for wireless communications services. The key issue in this respect is a market forecast for the users within IMT. The methodology is designed to accommodate a wide variety of applications. The required format of the market information is defined in 3.5. An example of suitable
31、 market information in this format can be found in Report ITU-R M.2072 and updated market information of IMT can be found in Report ITU-R M.2243. 2.2 Technical considerations The methodology takes a technology-neutral approach in its technical studies of RATs and uses the classification of RATGs def
32、ined in Report ITU-R M.2074. The spectrum calculation methodology requires technical parameters to characterize the different RATGs as input to the spectrum calculations. By the RATG approach, the technical consideration for spectrum estimation can easily be conducted without referring to the detail
33、ed specification of radio interfaces both of existing and future mobile systems. The technical consideration includes the RATG definitions and radio parameters associated with the RATGs, which are used at different steps of the methodology. These radio technology aspects and values for the radio par
34、ameters, such as spectral efficiency, have been considered and are described in Report ITU-R M.2074. 4 Rec. ITU-R M.1768-1 2.3 RATGs The methodology takes into account the total terrestrial communication market that will be provided by various communication means in terms of services and networks ac
35、cording to Recommendations ITU-R M.1645, ITU-R M.1457 and ITU-R M.2012. There are a number of RATGs which can be identified. The present methodology distributes the total traffic forecasted for the total terrestrial communication market to the identified RATGs, which are: Group 1: Pre-IMT systems, I
36、MT-2000 and its enhancements. This group covers the digital cellular mobile systems, IMT-2000 systems and their enhancements. Group 2: IMT-Advanced systems as described in Recommendation ITU-R M.2012. Group 3: Existing radio LANs and their enhancements. Group 4: Digital mobile broadcasting systems a
37、nd their enhancements. 3 The methodology for spectrum requirement calculations 3.1 Scope of the spectrum calculation methodology for IMT The methodology considers traffic forecasts for all RATGs (RATG1-RATG4); however, it calculates spectrum requirements only for RATG1 and RATG2, which correspond to
38、 IMT systems. 3.2 Approach for spectrum calculation The technical process of estimating spectrum requirements for mobile communications has to be based on four essential issues: Definition of services Market expectations Technical and operational framework Spectrum calculation algorithm. 3.3 Generic
39、 flow of the methodology The generic flow chart for the spectrum requirement calculation methodology is shown in Fig. 1. Step 1: presents the different definitions used in the methodology, which are given in 3.4. Step 2: analyses the market data, which may be obtained from Reports ITU-R M.2072 and I
40、TU-R M.2243. Analysis of market data is described in 3.5. Step 3: values for the methodology are computed as described in 3.5.2.6. Step 4: distributes traffic to different RATGs and radio environments inside the RATGs, which is presented in 3.6. Step 5: determines required system capacity to carry t
41、he offered traffic. Capacity calculation algorithms are given separately for circuit switched and packet-switched service categories in 4.1 and 4.2, respectively. Step 6: calculates the spectrum requirements of RATG1 and RATG2 which is presented in 4.3. Step 7: applies necessary adjustments to take
42、into account practical network deployments as described in 5. Step 8: calculates aggregate spectrum requirements in 6. Rec. ITU-R M.1768-1 5 Step 9: gives the spectrum requirements for RATG1 and RATG2 as an output. FIGURE 1 Flow chart for a generic spectrum calculation methodology M.1768-01Step 1: d
43、efinitionsa) service categories (SCs)b)service environments (SEs)c) radio environments (REs)d) radio access technologygroups (RATGs)Step 2: analyse the collected market dataStep 3: compute traffic demand by service environments and service categoriesStep 4: distribute traffic among RATGs and within
44、each RATGStep 5: determine system capacity required to carry trafficStep 6: spectrum requirements for RATG No. 2Step 8: calculate aggregate spectrum requirementsStep 9: spectrum requirementsStep 7: apply necessary adjustments guardbands multi operator minimum deployment spectrum.RATG No. 1 RATG No.
45、2 RATG No. rat6 Rec. ITU-R M.1768-1 3.4 Definitions In this section all the needed input parameters and associated categorizations are defined. The following sections include tables for the required parameters for the methodology. The parameter values in these tables should be considered as examples
46、 as indicated in the corresponding tables. First service types and traffic classes are introduced to reflect the likely peak data rates available and the likely traffic profile of a service. A service category is defined as a combination of the service type and traffic class. Service environments ar
47、e defined to categorize the area of where the user is when they are assessing a service and the traffic profile of that geographical area. Service environments are defined as a combination of service usage pattern and teledensity. The radio environment is defined to reflect the radio infrastructure
48、that provides the services to the users in service environment. Radio environments are defined to reflect the different radio deployments concepts. Different RATGs are defined to take into account the wider terrestrial communication market available to provide the services. 3.4.1 Service categories
49、A service category (SC) is defined as a combination of service type and traffic class as shown in Table 1. TABLE 1 Service categorization Traffic classService type Conversational Streaming Interactive BackgroundSuper-high multimedia SC1 SC6 SC11 SC16 High multimedia SC2 SC7 SC12 SC17 Medium multimedia SC3 SC8 SC13 SC18 Low rate data and low multimedia SC4 SC9 SC14 SC19 Very low rate data(1)SC5 SC10 SC15 SC20 (1)This includes speech and SMS. 3.4.1.1 Service types The peak bit rates are used to categorize the service types. It is possible to g
