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NTFA & Channel Arrangements

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NTFA & Channel Arrangements NTFA & Channel arrangements Training on SMS4DC Vientiane, Lao P.D.R 12 – 14 February 2019 Aamir Riaz International Telecommunication Union – Regional Office for Asia and the Pacific [email protected] Outline • National Table of Frequency Allocations 1 • Channel Arrangements 2 SMS4DC Spectrum Allocation Chart Draw Chart: Item to depict a section of regional or national FAT in strip format. Each segment in the frequency allocations strip denotes a frequency allocation to a radiocommunication service with its service priority . SMS4DC Spectrum Allocation Chart(2) The mouse cursor shape on the strip is changed to a cross (+) and a left-click on a colored patch shows its characteristics, including: frequency band, service name, service priority, service footnotes and frequency band footnotes at the top-left corner of chart. Push buttons in browsing toolbar in the item “Frequency Allocations‐>Edit‐ >Plan” Modification of legend of frequency allocations chart Service table” item in menu enables user to browse and modify radiocommunication service name and color used in the frequency allocations chart. Editing National Plan and Footnote The “Edit” menu under the frequency allocations chart provides three powerful items: “Plan”, “Service Table” and “Footnotes” to edit the content of the frequency allocations table and chart color. Editing National Plan and Footnote(1) Editing the Service Table Editing the footnote Outline • National Table of Frequency Allocations 1 • Channel Arrangements 2 Channel Arrangements Purposes(1) Once a frequency band has been allocated to a service, it is necessary to make provision for systems and users to access the frequencies in an orderly manner. The most commonly used method is by frequency division. That is, by dividing the spectrum available into a number of channels. The bandwidth of the channels depends on the technology to be used and the required traffic capacity of the systems that will use the channel. Channel Arrangements: Purpose(2) In many cases, the type of traffic to be sent will require simultaneous bi-directional communication (duplex operation), therefore the channel arrangement should provide two- frequency channels for “go and return”. In order to provide harmonisation of frequency use, for example to aid cross border frequency coordination, ITU-R has developed recommended channels arrangements for bands allocated to the fixed service. For the same reason, some regional organizations have also developed arrangements for both fixed and mobile services. Modes of Channel Operation Simplex operation: Operating method in which transmission is made possible alternately in each direction of a telecommunication channel, for example, by means of manual control Duplex operation: Operating method in which transmission is possible simultaneously in both directions of a telecommunication channel Duplex operation: Operating method in which transmission is possible simultaneously in both directions of a telecommunication channel Necessary bandwidth: For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under specified conditions Modes of Channel Operation(2) Frequency division duplex (FDD): Frequencydivisionduplex(FDD)isa technique where separate frequency bands are used at the transmitter and receiver side Because the FDD technique uses different frequency bands for send and receive operations, the sending and receiving data signals don't interfere with each other. This makes FDD a better choice than Time Division Duplex (TDD) . Modes of Channel Operation(3) Time division duplex (TDD):Time division duplex (TDD) refers to duplex communication links where uplink is separated from downlink by the allocation of different time slots in the same frequency band. It is a transmission scheme that allows asymmetric flow for uplink and downlink data transmission. CEPT Recommendation TR 25‐08: Frequency arrangements for VHF bands allocated to the mobile service FB = Fixed Base transmit frequency channels ML = Land Mobile transmit frequency channels Si = Single frequency CEPT Recommendation TR 25‐08: Frequency arrangements for UHF bands allocated to the mobile service SMS4DC Frequency arrangement Frequency arrangement item in the “Frequency Allocation ”menuofSMS4DC. There are three possible types of frequency arrangement in SMS4DC: Homogenous, Uniform, and, Non-uniform Any frequency plan shall be in conformity with frequency allocation table. There are already list of planned assignable frequencies could be browsed from item “Frequency table” of “Frequency Allocation ” menu . Types of Frequency Arrangement in SMS4DC: Homogeneous channel arrangement(FDD): = 0+ +. , =0,1,2,… ′= 0+ ′+. , =0,1,2,… Types of Frequency Arrangement in SMS4DC(2): Uniform channel arrangement: = 0+. , =0,1,2,… Types of Frequency Arrangement in SMS4DC(2): Non-uniform channel arrangement. VHF Frequency Channel Arrangement 146 to 174 MHz Tow Types of channel arrangement Single-frequency channels for the mobile service Dual frequency channels for the mobile service Channel bandwidth in VHF 146‐174 MHz systems are6.25,12.5,25…..kHz Single‐frequency channels for the mobile service in VHF For the band of 146-146.8 , the channel arrangement result using SMS4DC is ID : 20 Frequency Plan ID : 1460.000025 Region : 1 Frequency Band : [146.012 ‐ 146.813] MHz Channel Spacing : 0.025 MHz RadioCommunication Service : Land Mobile Priority : Primary Type of Frequency Plan : Uniform Comment : ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ Frequency Unit : MHz ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ No. Center Frequency 001 146.025 002 146.05 : : 031 146.775 032 146.8 Dual frequency channels for the mobile service In VHF For the GO band of 146.8-149.9 and RETURN band of 151.1-154.2 , the channel arrangement result using SMS4DC is ID : 21 Frequency Plan ID : 1468.000012 Region : 1 Frequency Band : [146.806 - 149.906] MHz [151.406 - 154.506] MHz Channel Spacing : 0.0125 MHz RadioCommunication Service : Land Mobile Priority : Primary Type of Frequency Plan : Homogeneous Comment : ----------------------------------------------------------------------------------- Frequency Unit : MHz ----------------------------------------------------------------------------------- Lower Upper No. Center Frequency Center Frequency 001 146.813 151.412 002 146.825 151.425 003 146.838 151.438 : : : 247 149.888 154.488 248 149.9 154.5 RF channel arrangements for digital fixed wireless systems operating in the 7900 ‐ 8400 MHz band(1) RF Channel arrangement suitable for digital fixed wireless systems with a channel separation up to 28 MHz, lower half of the band: fn= f0 – 259 + 28 n MHz upper half of the band: f’n = f0 + 7 + 28 n MHz where: f0=8150 , n = 1, 2, 3, . 8. RF channel arrangements for digital fixed wireless systems operating in the 7900 ‐ 8400 MHz band RF channel arrangements for band the 7900 - 8400 MHz band using SMS4DC is ID : 22 Frequency Plan ID : 81500.028000 Region : 1 Frequency Band : [7905 - 8129] MHz [8171 - 8395] MHz Channel Spacing : 28 MHz RadioCommunication Service : Fixed Priority : Primary Type of Frequency Plan : Homogeneous Comment : ----------------------------------------------------------------------------------- Frequency Unit : MHz ----------------------------------------------------------------------------------- Lower Upper No. Center Frequency Center Frequency 001 7919 8185 002 7947 8213 006 8059 8325 007 8087 8353 008 8115 8381 LIST OF FREQUENCY BANDS AND ADOPTED RECOMMENDATIONS Notification of frequency Assignments for recording in the Master International Frequency Register (MIFR) Training on SMS4DC Vientiane, Lao P.D.R 12 – 14 February 2019 Aamir Riaz International Telecommunication Union – Regional Office for Asia and the Pacific [email protected] Spectrum management The ever-increasing global application of different means of radiocommunications and a need for correct management of intensive use of radio frequencies requires a high level of international cooperation. One of the principal tasks of ITU-R is to administer and facilitate the complex intergovernmental relations needed to develop legally binding agreements between sovereign States. The Importance of Notification Radio frequency spectrum is a limited natural resource that must be used rationally, efficiently and economically, inconformity with the Radio Regulations, so that countries and groups of countries may have equitable access to it. It is therefore important to notify the BR about the bringing into use or the planned bringing into use of the radio-frequency, so as to: Allow the BR to apply the appropriate procedure(s); Inform other possibly affected Administrations about the actual use of theradio- frequencies; Initiate and complete any required coordination; Master International Frequency Register The Master International Frequency Register (MIFR) is the formal database of satellite and terrestrial frequency assignments maintained by the International Telecommunication Union (ITU). Recording in the MIFR is the final stage of the frequency coordination process, and confers international recognition and protection from interference for those frequency assignments. General Notification procedure N Notified In conformity Part I assignment RR 11.31 Y Assignment N Acknowledgment covered by a Plan? Y In conformityN RR 11.34 Returned Y Recorded
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