MCMC SRSP-512 18 August 2003 Issue 2
Standard Radio System Plan
REQUIREMENTS FOR LINE-OF-SIGHT RADIO- RELAY SYSTEMS OPERATING IN THE FIXED SERVICE IN THE LOWER 6 GHz FREQUENCY BAND 5925 MHz TO 6425 MHz
S Su S u ur r ru u uh h ha a an n nj j ja a ay y ya a a K K Ko o om m mu u un n ni i ik k ka a as s si i i d d da a an n n M M Mu u ul l l t t t i i i m m m e ed e d di i i a a a M M Ma a al l la a a y ys y s si i ia a a
Malaysian Communications and Multimedia Commission
Aras 11 Menara Dato’ Onn, Putra World Trade Centre, 45 Jalan Tun Ismail, 50480 Kuala Lumpur Tel: +60 3 4047 7000 Fax: +60 3 2694 0908 Website: http://www.cmc.gov.my/mcmc/
TABLE OF CONTENTS PAGE
1.0 GLOSSARY 3
2.0 INTENT 4
3.0 GENERAL 4
4.0 FREQUENCY CHANNELING PLAN 5
5.0 GENERAL GUIDELINES FOR USAGE OF SPECTRUM 7
6.0 PRINCIPLES OF ASSIGNMENT 9
7.0 REFERENCES 10
APPENDIX A 11
1.0 GLOSSARY Apparatus
Assignment (AA)
An assignment that confers rights on a person to use the spectrum to operate a network facility of a specified kind at a specified frequency or in any specified frequency band or bands.
Fixed services (FS) A radio communications service between specified fixed points.
Fixed Satellite Service (FSS)
A radiocommunications service between earth stations at a given position, and, when one or more satellites are used, the given position may be a specified fixed point or any fixed point within a specified area and includes satellite-to-satellite links which may also be operated in the inter-satellite service and feeder links for other space services.
Harmful Interference
Interference that endangers or seriously degrades, obstructs or repeatedly interrupts the functioning of a radionavigation service or one or more safety services operating in accordance with the Communications and Multimedia (Spectrum) Regulations 2000.
Interleaved Channels
The transmission of signals from two or more digital sources in time-division sequence over a single path.
Mini or Spur Link Radio links from a Base Station to Exchange (switching centre) and transmission distance less than 40 km without repeater.
Polarisation The property that describes the orientation of an electric field vector for an electromagnetic wave based on time varying direction and amplitude.
Radio Frequency (RF) Channel
Generally, a frequency from approximately 50 kHz to 3 GHz. RF is usually referred to whenever a signal is radiated through the air.
Radio Relay Systems
The reception and retransmission by a radio station of signals that are received either within terrestrial point-to-point communications system, such as a microwave-relay communications system or a satellite communications system.
SDH SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media. Both technologies provide faster and less expensive network interconnection than traditional PDH (Plesiochronous Digital Hierarchy) equipment.
SDH uses the following Synchronous Transport Modules (STM) and rates: STM-1 (155 megabits per second), STM-4 (622 Mbps), STM-16 (2.5 gigabits per second), and STM-64 (10 Gbps).
Trunk or main Link
Radio links from a Switching Centre (exchange) to Switching Centre (exchange) and transmission distance more than 40 km without repeater.
2.0 INTENT
2.1 This Standard Radio System Plan (SRSP) states the technical and operational requirements for the efficient use of the frequency band 5925-6425 MHz by line-of sight multiple-hop radio-relay systems in the fixed service, these systems being:
2.1.1 Radio systems using analogue modulation with RF channel loading equivalent to up to 2700 telephone channels or the equivalent occupying a radio bandwidth of 40 MHz,, and
2.1.2 Radio systems using digital modulation with RF channel capacities of the order of 140 Mbit/s or higher synchronous digital hierarchy (SDH) bit rates.
2.1.3 It should be noted that some administrations use different RF channel arrangement in the frequency band 5925-6425 MHz for high capacity digital radio-relay systems with a capacity of up to 2 x STM-1.
2.1.4 Radio systems using analogue or digital modulation of lower channel capacities when main and interleaved channels are used simultaneously.
2.2 Radio-relay systems are intended as bearers for telephony, data, video and television signals.
2.3 For interconnection of radio-relay systems on international circuits in the 6 GHz band.
2.4 The intended use of these radio-relay systems is mainly for Trunk/Main Link only.
However the use of these radio-relay systems for Mini/Spur Link for economic reasons can be considered.
3.0 GENERAL
3.1 This SRSP is intended to regulate the usage of spectrum and does not attempt to establish any detailed equipment standards. However, technical characteristics of equipment used shall conform to ITU-R radio regulations in force and relevant technical parameters specified in any documents that are meant for type approval that the Malaysian Communications and Multimedia Commission (“MCMC”) may issue from time to time.
3.2 Existing systems using frequencies within this band, which do not conform to this SRSP shall be permitted to continue operation subject to approval by the MCMC.
New systems are required to conform to this SRSP.
3.3 Use of improved digital modulation techniques which increase channel loading capacity is encouraged and will be given priority in frequency assignment.
3.4 Although a radio system conforms to the requirements of this SRSP at the time of authorisation, the MCMC may require that modifications be made to the system whenever interference is caused or is liable to be caused to other radio stations or systems.
3.5 The MCMC may require the assignment holders and/or applicants to use receivers capable of rejecting harmful interference.
3.6 These frequency bands are also used in neighbouring countries. Close co-ordination with these countries will be necessary to prevent frequency interference in the border
areas. Use of these frequencies band will require co-ordination with the neighbouring countries, as below:
3.6.1 Within 50 kilometres of the Malaysian border with FACSMAB (Frequency Assignment and Co-ordination Between Singapore, Malaysia And Brunei Darussalam), that takes place monthly)
3.6.2 Within 60 kilometres of the Malaysian border with other countries; e.g. With Thailand and Indonesia, takes place twice a year.
3.7 This SRSP is subject to revision from time to time.
4.0 FREQUENCY CHANNELING PLAN
4.1 The frequency channelling plan is based on the preferred radio-frequency channel arrangement of ITU-R Recommendation ITU-R F.383-7 (05/01) [1] which provides for up to eight two-way main channels and is derived by the following.
4.2 Let fo be the centre frequency of the band of frequencies occupied (MHz)
fn be the centre frequency of one RF channel in the lower half of the band (MHz) fn’ be the centre frequency of one RF channel in the upper half of the band (MHz) Then the frequencies of individual channels are expressed by the following relationships:
For a channel spacing of 29.65 MHz
lower half of the band: fn = fo – 259.45 + 29.65 n MHz
upper half of the band: fn’ = fo – 7.41 + 29.65 n MHz
n = 1, 2, … , 8
For a channel spacing of 40 MHz
lower half of the band: fn = fo – 260 + 40n MHz
upper half of the band: fn’ = fo – 20 + 40n MHz
n = 1, 2, … , 6
For additional interleaved digital channels spacing of 29.65 MHz lower half of the band: fn = fo – 274.275 + 29.65 n MHz
upper half of the band: fn’ = fo – 22.235 + 29.65 n MHz
n = 1, 2, … , 8
Figure 1
Radio-frequency channel arrangement of radio-relay systems operating in frequency band 5925-6425 MHz
Note: 1. Centre Frequency fo = 6175 MHz
2. Separation between adjacent channels = 29.65 MHz
3. Separation between corresponding go and return channels = 252.04 MHz
4.3 The centre frequencies of the main RF channels for radio systems operating in the frequency band 5925-6425 MHz are shown in Table 1.
Table 1
Main Channel Carrier Centre Frequencies Channel No. Frequency (MHz) Channel No. Frequency
(MHz)
1 5945.200 1’ 6197.240
2 5974.850 2’ 6226.890
3 6004.500 3’ 6256.540
4 6034.150 4’ 6286.190
5 6063.800 5’ 6315.840
6 6093.450 6’ 6345.490
7 6123.100 7’ 6375.140
8 6152.750 8’ 6404.790
4.4 Table 2 shows the centre frequencies of the interleaved RF channels that are 14.825 MHz below the main channels.
Table 2
Interleave Channel Carrier Centre Frequencies Channel No. Frequency (MHz) Channel No. Frequency
(MHz)
1r 5930.375 1’r 6182.415
2r 5960.025 2’r 6212.065
3r 5989.675 3’r 6241.715
4r 6019.325 4’r 6271.365
5r 6048.975 5’r 6301.015
6r 6078.625 6’r 6330.665
7r 6108.275 7’r 6360.315
8r 6137.925 8’r 6389.965
4.5 Table 3 shows the centre frequencies of the main RF channels for radio systems operating in the frequency band 5925-6425 MHz are using 40 MHz bandwidth.
Table 2
Main Channel Carrier Centre Frequencies Channel No. Frequency (MHz) Channel No. Frequency
(MHz)
1 5955.00 1’ 6195.00
2 5995.00 2’ 6235.00
3 6035.00 3’ 6275.00
4 6075.00 4’ 6315.00
5 6115.00 5’ 6355.00
6 6155.00 6’ 6395.00
5.0 GENERAL GUIDELINES FOR USAGE OF SPECTRUM
5.1 The channel arrangements above primarily provide for eight (8) go and eight (8) return radio-frequency channels on the same route using either the main channel arrangement (Table 1) or alternatively the interleaved channel arrangement (Table 2).
The main channels and interleaved channels should not be mixed along the same route.
5.2 ITU-R F.383-7 (05/01) [1] recommends that when additional RF channels, interleaved between those of the main pattern are required, the values of the centre frequencies of these RF channels should be 14.825 MHz below those of the corresponding main channel frequencies. In systems for 1800 channels, or the
equivalent, and digital high capacity digital systems, it may not be practical, because of the bandwidth of the modulated carrier, to use interleaved frequencies.
5.3 When common transmit-receive antennae are used, eight (8) radio-frequency channels can be accommodated on two antennae or a single antenna. Channel arrangement for two-antenna systems shall be according to Table 3 and that for single-antenna shall be according to Table 4. Different polarisation shall be used for adjacent channels.
Table 3
Common Transmit-receive Antenna for up to 4 channels
Antenna No. Polarisation Go Channels Return Channels 1 H(V) 1 3 5 7 2’ 4’ 6’ 8’
2 V(H) 2 4 6 8 1’ 3’ 5’ 7’
Alternatively for dual polarised antenna 1 H(V)
V(H)
1 3
2 4
2’ 4’
1’ 3’
2 H(V) V(H)
5 7
6 8
6’ 8’
5’ 7’
Table 4
Common Transmit-receive Antenna With dual-polarisation for up to 8 channels
Antenna No. Polarisation Go Channels Return Channels 1 H(V) 1 3 5 7 1’ 3’ 5’ 7’
One antenna V(H) 2 4 6 8 2’ 4’ 6’ 8’
5.4 A fully developed channelling scheme using main radio frequency channels and interleaved channels for multi-hop radio relay systems are shown in Appendix A.
5.5 Up to sixteen (16) go and sixteen (16) return radio-frequency channels for systems as stated in paragraph 2.1.3 may be obtained on the same route by using the main channels and interleaved channels simultaneously.
5.6 Radio channels are required to be used to full capacity before additional channel will be assigned.
5.7 Protection channel may be permitted for multi-channel systems subject to approval by the MCMC. However systems using hot-standby are encouraged.
5.8 Frequencies assigned to a main route system shall be reused for spur routes and transmission routes shall be planned to maximise such usage without interference.
5.9 Mobile and Fixed-Satellite (Earth-to-space) services share the spectrum 5925 MHz to 6425 MHz on the basis of primary status in Region 3.
5.10 Radio systems for terrestrial fixed service should avoid radio interference to space stations of the Fixed-Satellite service and shall comply with ITU-R recommendations ITU-R SF.406-8 (04/93) [3] and ITU-R SF.765 (03/92) [4] and Article 21 of the Radio Regulations [5].
5.11 It should also be noted that part of band is allocated for satellite uplink and satellite news gathering.
5.12 The allocations of spectrum and shared services within these bands are found in the Malaysian Spectrum Plan shown in Table 5:
Table 5
Malaysian Spectrum Plan: Frequency Bands 5925 - 6425 MHz Frequency
Band (MHz) Malaysian Allocation Notes/Future use 5925-6700 FIXED
FIXED-SATELLITE (Earth-to-space) MLA34
MOBILE
5.149 5.440 5.458
Bands 5925 to 6425 MHz may be allocated for ESV
MLA34: The frequency bands filed for MEASAT Satellite Services are as shown in Chapter III, Part 3.4 General Table of Frequencies Information
Part of band allocated for Satellite uplink.
Part of band also allocated for Fixed Service.
6.0 PRINCIPLES OF ASSIGNMENT
6.1 Authorisation to use the line-of-sight radio-relay spectrum for the radio-relay fixed station apparatus is by way of Apparatus Assignment (AA). Priority is given to use as trunk or main link which exceeds 40 km.
6.2 Eligible persons who may apply for assignments are:
6.2.1 Network Facilities Provider Individual (NFPI) Licence holder, who provides radiocommunication transmitters and links.
6.2.2 Private network facility (Government and private corporations/companies) for own offshore private use only.
6.2.3 Private network facility (Government and private corporations/companies) for own inland private use only.
6.3 Applicants are required to:
6.3.1 Submit AA application for the apparatus on the prescribed AA forms.
6.3.2 For use in inland private network facility, applicant have to provide proof that
sight radio-relay service or any other similar service (wireless or wired) to the applicant.
6.4 The validity period of an AA for Line-of-Sight Radio-Relay systems in these bands is one (1) year and the AA holder may make fresh application for the AA not less than two months before expiry.
6.5 Issuance of an AA is also subject to successful co-ordination among assigned stations and with neighbouring administrations where it applies.
6.6 The apparatus assignment shall be on a first come first served basis. In the event of unavailability of spectrum, applicants will be placed in the queue that will be reviewed periodically.
7.0 REFERENCES
[1] ITU-R F.383-7 (05/01) Radio-frequency channel arrangements for high capacity radio-relay systems operating in the lower 6 GHz band
[2] SRSP-305.9 (06/86) (Canadian) Technical Requirements for Line-of-sight Radio Systems Operating in the Fixed Service in the Band 5915 - 6425 MHz
[3] ITU-R SF.406-8 (04/93) Maximum Equivalent Isotropically Radiated Power of Radio Relay Transmitters Operating in the Frequency Bands Shared with Fixed Satellite Services.
[4] ITU-R SF.765 (03/92) Intersection of Radio Relay Antenna Beams with Orbits used by Space Station of the Fixed Satellite System.
[5] Article 21 Radio Regulations Terrestrial and space services sharing frequency bands above 1GHz.
[6] The Strategic Issues on Spectrum Usage 2002
Issued by:
The Malaysian Communications and Multimedia Commission
APPENDIX A
CHANNEL FREQUENCY
(MHz)
1 2 3 4 5 6 7 8
1' 2' 3' 4' 5' 6' 7' 8'
REPEATER REPEATER
(H)
(H)
(H)
(H)
(H)
(H)
(H)
(H)
(H)
(H)
(H)
(H)
(H) (H)
(H) (H)
(H) (H)
(H) (H)
(H) (H) (H) (H)
(H) (H) (H) (H)
(H) (H) (H) (H)
(H) (H) (H) (H)
(H) (H) (H) (H) (H) (H) (H) (H)
(H) (H) (H) (H)
(V) (V)
(V)
(V)
(V) (V)
(V)
(V)
(V)
(V)
(V)
(V)
(V)
(V)
(V)
(V)
(V) (V) (V)
(V) (V)
(V)
(V)
(V)
(V)
(V)
(V)
(V) (V)
(V)
(V)
(V) (V)
(V)
(V)
(V) (V)
(V)
(V)
(V)
(V)
(V)
(V)
(V)
(V) (V) (V) (V)
TERMINAL TERMINAL
5930.375 5945.200
5974.850 5960.025 6004.500 5989.675 6034.150 6019.325 6063.800 6048.975 6093.450 6078.625 6123.100 6108.275 6152.750 6137.925
6197.240 6182.415 6226.890 6212.065 6256.540 6241.715 6286.190 6271.365 6315.840 6301.015 6345.490 6330.665 6375.140 6360.315 6404.790 6389.965
MAIN INTERLEAVED CH NO
Radio Channel Arrangement for Multi-hop System
