Iess313e.pdf (VSAT Performance Characteristics From IntelSAT

INTELSAT EARTH STATION STANDARDS (IESS)

Document IESS–313 (Rev. 1)

PERFORMANCE CHARACTERISTICS FORBROADBAND VSAT (BVSAT) DIGITAL CARRIERS

(Standard A, B, C, E, F, H–4, H–3 and K–3 Earth Stations)

APPROVAL DATE: 20 November 2000

IESS–313 (Rev. 1)Page i

SECT. TABLE OF CONTENTS PAGE

1. INTRODUCTION ...................................................................................................1

2. GENERAL BROADBAND VSAT (BVSAT) SYSTEMCHARACTERISTICS ............................................................................................. 1

2.1 Service Description..................................................................................................2

2.1.1 Service Classes.........................................................................................................2

2.1.2 Quality of Service (QoS)..........................................................................................3

2.1.2.1 Frame Relay QoS.....................................................................................................4

2.1.2.2 IP QoS......................................................................................................................4

2.1.2.3 ISDN QoS ................................................................................................................4

2.1.2.4 ATM QoS.................................................................................................................4

2.2 TDMA Carrier Characteristics.................................................................................5

3. EQUIVALENT ISOTROPICALLY RADIATED POWER (EIRP) .......................6

3.1 EIRP Correction Factors ..........................................................................................6

3.2 EIRP Adjustment .....................................................................................................6

3.3 EIRP Stability...........................................................................................................6

3.3.1 Clear Sky..................................................................................................................6

3.3.2 Adverse Weather Conditions ...................................................................................7

3.3.3 Scintillation Effects..................................................................................................7

4. EMISSION CONSTRAINTS ..................................................................................7

4.1 Off–Axis Emission Constraint and Allowable Connectivity ...................................7

4.2 Spurious Emissions (Except Intermodulation Products)..........................................7

4.3 Spurious Emissions – Intermodulation Products .....................................................8

4.4 RF Out–of–Band Emission (Carrier Spectral Sidelobes).........................................8

5. FREQUENCY TOLERANCES AND SPECTRUM INVERSION ........................8

5.1 Carrier RF Tolerance ............................................................................................... 8

5.2 Satellite Transponder Frequency Tolerance............................................................. 9

IESS–313 (Rev. 1)Page ii

SECT. TABLE OF CONTENTS PAGE

5.3 Spectrum Inversion ..................................................................................................9

6. OPERATIONAL BANDWIDTH AND FREQUENCY RANGE...........................9

7. PHASE NOISE ........................................................................................................9

7.1 Earth Station (Transmit)...........................................................................................9

7.2 Earth Station (Receive) ..........................................................................................10

8. CARRIER LINE–UP AND IN–SERVICE MONITORING.................................10

9. INTERFACES .......................................................................................................11

9.1 Indoor Unit (IDU) ..................................................................................................11

9.1.1 70 MHz IF Interface (LINKWAY™2000 Only) ...................................................11

9.1.1.1 Transmit (To ODU) ............................................................................................... 11

9.1.1.2 Receive (From ODU)............................................................................................. 11

9.1.2 L–Band IF Interface (LINKWAY™2100 and IP Only) ........................................11

9.1.2.1 Transmit (To ODU) ............................................................................................... 12

9.1.2.2 Receive (From ODU)............................................................................................. 12

9.2 Terrestrial Interfaces .............................................................................................. 12

9.2.1 DS3 (44.736 Mbit/s) ATM.....................................................................................12

9.2.2 E3 (34.368 Mbit/s) ATM .......................................................................................13

9.2.3 Internet Protocol (IP) ............................................................................................. 13

9.2.4 Serial Synchronous ................................................................................................ 13

9.2.5 E1 (2.048 Mbit/s) Interface....................................................................................14

9.2.6 DS1/T1 (1.544 Mbit/s)...........................................................................................14

10. CONTROL OF TRANSMITTING BVSAT TERMINALS..................................15

IESS–313 (Rev. 1)Page iii

LIST OF TABLES PAGE

Table 1 BVSAT Networks – Transponder Assignments ..................................................16

Table 2 Frame Relay Service Classes Defined In Rec. ITU–T X.146................................ 17

Table 3 BVSAT Carrier Performance Objectives (Through Satellite Channel) ................. 18

Table 4 EIRP Stability Requirements .................................................................................19

Table B.1 BVSAT Terminal Nominal EIRP Requirements for Operation withINTELSAT 801 (328.5ºE Longitude, C–Band Downlinks, dBW) .................... B–2

Table B.2 BVSAT Terminal Nominal EIRP Requirements for Operation withINTELSAT 801 (328.5ºE Longitude, Ku–Band Downlinks, dBW) .................. B–3

Table B.3 BVSAT Terminal Nominal EIRP Requirements for Operation withAPR–2 Capacity [SINOSAT-1 @ 110.5º East Longitude, C–Band(Linear Polarization), dBW]............................................................................... B–4

Table B.4 BVSAT Terminal Nominal EIRP Requirements for Operation withINTELSAT 804 (64º East Longitude, C–Band Downlinks, dBW).................... B–5

Table B.5 BVSAT Terminal Nominal EIRP Requirements for Operation withINTELSAT 804 (64º East Longitude, Ku–Band Downlinks, dBW).................. B–6

Table B.6 BVSAT Terminal Nominal EIRP Requirements (Provisional) forOperation with INTELSAT 901 (62º East Longitude, dBW) ............................ B–7

LIST OF FIGURES

Figure 1 Europe / Americas Network – Europe Coverage Diagram....................................20

Figure 2 Europe / Americas Network – Americas Coverage Diagram ................................ 21

Figure 3 Europe / Africa Network – Africa Coverage Diagram ..........................................22

Figure 4 Pan–Asia Network – C–Band Coverage Diagram (SINOSAT–1 @110.5ºE)..................................................................................................................23

Figure 5 Europe / NE Asia Network – Europe Coverage Diagram......................................24

Figure 6 Europe / NE Asia Network – NE Zone Coverage Diagram...................................25

Figure 7 Europe / Middle East Network – Europe Coverage Diagram................................ 26

Figure 8 Europe / Middle East Network – Middle East Coverage Diagram........................27

Figure 9 Single Sideband Phase Noise Spectral Density......................................................28

IESS–313 (Rev. 1)Page iv

LIST OF APPENDICES

APPENDIX A ITU References

APPENDIX B Nominal EIRP Requirements for BVSAT Terminals

APPENDIX C Revision History

LIST OF ACRONYMS

ACRONYM DEFINITION

AC Alternating Current

AFC Automatic Frequency Control

AMI Alternate Mark Inversion

ANSI American National Standards Institute

ATM Asynchronous Transfer Mode

BER Bit Error Ratio

BNMS BVSAT Network Management System

BOD Bandwidth–On–Demand

BVSAT Broadband VSAT

BW Bandwidth

CBR Committed Bit Rate

CIR Committed Information Rate

COMSAT Communications Satellite Corporation

DC Direct Current

e.i.r.p. Equivalent Isotropically Radiated Power

EIRP Equivalent Isotropically Radiated Power

FEC Forward Error Correction

FLR Frame Loss Ratio

IESS–313 (Rev. 1)Page v

LIST OF ACRONYMS

ACRONYM DEFINITION

FR Frame Relay

FTD Frame Transfer Delay

HDB3 High Density Bipolar 3

IDU Indoor Unit

IEEE Institute of Electrical and Electronics Engineers

IESS INTELSAT Earth Station Standard

IF Intermediate Frequency

IFL Inter–Facility Link

INTELSAT International Telecommunications Satellite Organization

IP Internet Protocol

ISDN Integrated Services Digital Network

ITU International Telecommunication Union

MBR Maximum Burst Rate

MBS Maximum Burst Size

ODU Outdoor Unit

PLCP Physical Layer Convergence Protocol

PRI Primary Rate Interface

PVC Permanent Virtual Circuit

QoS Quality of Service

QPSK Quadrature Phase Shift Keying

RF Radio Frequency

SBR Sustainable Burst Rate

SCSI Small Computer Systems Interface

SFD Saturation Flux Density

SS7 Signalling System No. 7

SSOG Satellite Systems Operations Guide

IESS–313 (Rev. 1)Page vi

LIST OF ACRONYMS

ACRONYM DEFINITION

SVC Switched Virtual Circuit

TDMA Time Division Multiple Access

UBR Unspecified Bit Rate

UNI User Network Interface

VBR–nrt Variable Bit Rate – non–real time

VBR–rt Variable Bit Rate – real time

VC Virtual Circuit

VPN Virtual Private Network

VSAT Very Small Aperture Terminal

IESS–313 (Rev. 1)

INTELSAT EARTH STATION STANDARDS (IESS)

PERFORMANCE CHARACTERISTICS FORBROADBAND VSAT (BVSAT) DIGITAL CARRIERS

1. INTRODUCTION

This document provides the performance characteristics of Broadband VSAT(BVSAT) digital carriers for operation with Standard A, B, C, E, F, H–4, H–3 andK-3 BVSAT terminals accessing the INTELSAT VIII, IX and APR–2 capacity onSINOSAT-1 at 110.5º East longitude. It is intended to assist Users in planning theirearth station RF equipment and terrestrial interfaces.

The BVSAT service is a network service that offers INTELSAT’s business customersbroadband multimedia internetworking capabilities on a regional and internationalbasis. The service is offered in specific transponders using INTELSAT's satellitefleet in C–Band and Ku–Band capacity (see Table 1).

The BVSAT traffic terminal comprises an antenna, an outdoor unit (ODU) and anindoor unit (IDU). The L–Band versions of the IDU (LINKWAY™2100 andLINKWAY™IP) are only available integrated with an ODU and only from a singlevendor, COMSAT Laboratories. The 70 MHz version of the IDU(LINKWAY™2000) can be purchased separately from COMSAT Laboratories andused with a variety of uplink chain configurations.

Due to the technical difficulties associated with testing small aperture earth stationsusing INTELSAT facilities (e.g., lack of motorized drives and accurate angularscaling devices), it is strongly recommended that all standard H, K, F–1 and E–1BVSAT terminals utilize type–approved antennas or be individually tested on anantenna test range at the sole cost of the earth station owner. Those small apertureearth stations capable of being tested using INTELSAT facilities may experiencelong delays due to the potentially large numbers of earth stations seeking access toINTELSAT and the limited resources available for testing.

2. GENERAL BROADBAND VSAT (BVSAT) SYSTEM CHARACTERISTICS

The service descriptions in this IESS module explain the existing service and plannedfuture enhancements.

IESS–313 (Rev. 1)Page 2

2.1 Service Description

The BVSAT service is a packet–based network that offers the following features:

• Bandwidth-on-demand (BOD) capacity with guaranteed qualities of service(QoS).

• Seamless support for terrestrial protocols such as IP, Frame Relay, ISDN andATM.

• Support for Virtual Private Networks (VPNs) in Mesh, Star and Hybridconfigurations.

• Data connections ranging from 16 kbit/s to 4.096 Mbit/s.

• Simultaneous multiple connections from a single traffic terminal.

• Multi-transponder operation.

• Asymmetric connectivities.

• Multicasting and broadcasting.

2.1.1 Service Classes

The BVSAT service supports the following types of connections:

• Permanent Virtual Circuit (PVC) offers a full–time logical connection.

• Switched Virtual Circuit (SVC) offers a logical connection that is initiated andrelinquished on user request. An SVC connection is subject to call blocking atcall set–up. INTELSAT will ensure an acceptable performance for blockingprobability in SVC call set–up through proper traffic engineering anddimensioning of the network capacity.

During a virtual connection, the quality of service for PVCs and SVCs are identical.The detailed SVC call set–up procedures are not known at this time, but it is certainthat any implementation will closely follow the recommendations specified byinternational standard bodies or industry forums.

The BVSAT service will initially support only PVC connections. It is planned tosupport Frame Relay and ISDN SVC connections beginning in the second quarter of2001 and ATM SVC connections in the fourth quarter of 2001.

Any BVSAT virtual circuit, PVC or SVC, is defined by two elements: committedinformation rate (CIR) and maximum burst rate (MBR). The BVSAT network will


pre–assign capacity to assure the CIR, and provide on–demand capacity on a best–effort basis, to support data rates in excess of the CIR up to the MBR. The networkwill discard data in excess of the MBR.

In addition to PVC or SVC classes, the BVSAT service also allows the leasing of anentire BVSAT carrier.

The following summarizes the service classes:

• PVC with CIR > 0, MBR = 2 x CIR.

• PVC with CIR = 0, MBR selectable.

• PVC with CBR (Constant Bit Rate) (CBR = CIR = MBR).

• SVC with CIR > 0, MBR = 2 x CIR.

• SVC with CIR = 0, MBR selectable.

• SVC with CBR (CBR = CIR = MBR).

• BVSAT carrier.

Virtual Connections Examples:

• A VC (PVC or SVC) having a CIR of 64 kbit/s will be assured of having thatamount of capacity reserved. The connection will be permitted to burst up to anMBR of 128 kbit/s. Data in excess of 64 kbit/s will be offered on a best–effortbasis. Data in excess of 128 kbit/s will be discarded at the network entrance.

• A BVSAT CBR connection of 64 kbit/s will be assured of having that amount ofcapacity reserved. Data in excess of 64 kbit/s will be discarded at the networkentrance.

• A CIR = 0 connection with an MBR of 64 kbit/s will accommodate all data on abest–effort basis. Data in excess of 64 kbit/s will be discarded at the networkentrance. The CIR = 0 service class is expected to be attractive for use withdelay–tolerant traffic such as email.

2.1.2 Quality of Service (QoS)

The QoS provided for various protocols is described below.


2.1.2.1 Frame Relay QoS

The Frame Relay QoS is defined by ITU Recommendation X.146, as shown inTable 2. Table 2 defines various service classes and their performance objectives.BVSAT will support Class 0 and Class 1 performance. Class 2 and Class 3 areoptional in Rec. ITU–T X.146 and will not be supported by BVSAT. The BVSATCIR > 0 offering corresponds to the Class 1 service. Because of capacity pre-assignment, CIR traffic will not be subjected to congestion due to capacity shortage.Frame Loss Ratio (FLR) is only attributed to cell loss due to link unavailability. AnFLR of 1x10-3, which is defined as the performance objective for the Class 1 service,can be achieved with a link availability of 99.6% to a threshold BER of 10–8, whichINTELSAT has selected as the link availability performance for the BVSAT service.

Frame Transfer Delay (FTD) in the BVSAT system consists primarily of satellitedelay, TDMA framing delay and terminal buffer delay. TDMA framing delay is, at amaximum, equivalent to the TDMA frame length, which will normally be setbetween 24 ms to 40 ms. The delay contribution from terminal buffering isnegligible for high priority traffic, such as real–time applications. A single hopsatellite link can meet the FTD performance objective of 400 ms.

User data in excess of the CIR corresponds to the Class 0 service in Table 2. Thisclass is subject to frame loss due to network congestion. There is no performancebound specified in ITU X.146 for this class.

2.1.2.2 IP QoS

IP traffic will be mapped to a BVSAT CIR = 0 service. Those IP customers whowant a guaranteed minimum throughput can route IP over FR or ATM and subscribeto a VC with a CIR > 0.

2.1.2.3 ISDN QoS

The ISDN rate of n x 64 kbit/s (up to 2048 kbit/s) will be mapped to BVSAT CBRservice having the same data rate.

2.1.2.4 ATM QoS

ATM traffic descriptors will be mapped to BVSAT traffic QoS descriptors asfollows:

(a) ATM CBR (constant bit rate) traffic will have its SBR (sustainable burst rate)mapped directly to the BVSAT CBR service.


(b) ATM VBR–rt and –nrt (variable bit rate–real time and –non-real time) willhave its SBR mapped directly to the BVSAT CIR. The ATM MBS(maximum burst size) will be set to match the BVSAT MBR (2 x CIR).

(c) ATM ABR (available bit rate) is not supported.

(d) ATM UBR (unspecified bit rate) will be mapped to the BVSAT CIR = 0service. Users can select the maximum burst rate. TDMA CarrierCharacteristics

The TDMA carriers used in the INTELSAT BVSAT system employ an inner Rate ½FEC (convolutional encoding/Viterbi decoding) and Reed–Solomon (236, 216) outercoding in conjunction with QPSK modulation. Aggregate User Information Rates*(per TDMA carrier) of 512 kbit/s, 2048 kbit/s or 4096 kbit/s are planned.

Table 3 provides the carrier channel spacing and the nominal occupied bandwidthsfor the four User information rates employed in the BVSAT service as well as theservice performance objectives. INTELSAT will provide a bit error rate (BER) thatis virtually error–free (BER < 10–10) under clear–sky conditions and, under degradedsky conditions, a BER of less than or equal to 10–8 for more than 99.6% of the year atboth C–Band and Ku–Band.

Since BVSAT carriers may share transponders with carriers employing otherapproved modulation techniques, BVSAT terminals are designed so that carriers canbe received in the presence of adjacent carriers which employ other approvedmodulation techniques.

In general, the HPA is a major cost component of a VSAT terminal. In order tominimize the cost of the ground terminal, INTELSAT will offer the BVSAT serviceusing TDMA carriers of various data rates. Traffic terminals with lower throughputrequirements can access the lower rate TDMA carriers to minimize the HPArequirements. Users are urged, when planning their terminals, to consider theevolution of multimedia applications towards higher throughput data rates.

* The information rate at the input to the TDMA FEC/modulator (see Table 3), which determines the

operating carrier–to–noise density ratio (C/No) for the link, is higher by a factor of the reciprocal ofthe TDMA frame efficiency. The TDMA frame efficiency (excluding TDMA frame overheads,guardtimes and protocols) is approximately 89.5% for the BVSAT system.


3. EQUIVALENT ISOTROPICALLY RADIATED POWER (EIRP)

The nominal BVSAT earth station EIRP requirements are provided in Appendix Band were determined on the assumption that BVSAT terminals will not, in general, belocated at the edge of the satellite beam coverage (i.e., there is an assumed nominaluplink and downlink beam pattern advantage). For terminals lying outside thisnominal coverage area, the requirements of Section 3.1 shall apply.

A BVSAT terminal can operate with a variety of receive earth station standardsranging from Standard A to Standard H–3 at C–Band and Standard C to K–3 atKu-Band. In designing the BVSAT terminal’s transmit equipment, Users should,therefore, consider the minimum performance receive terminal and/or the maximumcarrier symbol rate anticipated in determining the maximum EIRP that will need to besupported. It is strongly recommended that all Standard H, K, E–1 and F–1 BVSATterminals utilize type–approved antennas.

3.1 EIRP Correction Factors

In deriving the maximum uplink EIRP requirements for BVSAT terminals, an uplinkand downlink pattern advantage of 2 dB was assumed at C–Band. For Ku–Band, anuplink and downlink pattern advantage of 3 dB was assumed. For the APR–2capacity on SINOSAT–1, an uplink and downlink pattern advantage of 1.0 dB wasassumed. For BVSAT terminals that are located outside the assumed beam patterncoverage, Users must use, as a minimum, a Standard H–4 at C–Band and a StandardE–1 at Ku–Band.

3.2 EIRP Adjustment

The necessary EIRP per carrier during clear–sky condition is a function of thesatellite sensitivity, the geographic location of the transmitting and receiving BVSATterminals, the receive BVSAT terminal’s G/T, and the TDMA carrier’s symbol rate.The BVSAT Network Management System (BNMS) will, depending on thesecharacteristics, command the transmitting BVSAT terminal’s IDU to an appropriateIF transmit level which will result in the desired EIRP.

3.3 EIRP Stability

3.3.1 Clear Sky

The EIRP in the direction of the satellite shall, under clear–sky condition and lightwind, meet the stability requirements of Table 4. This tolerance includes all factorscausing variation, such as HPA output power instability, frequency response of the


uplink transmit equipment across the bandwidth allocated for BVSAT operation,transmitting equipment gain instability and antenna tracking error, added on a root–sum–square basis.

To meet the EIRP stability requirements, Users of Standard E–2, E–3, F–2 and F–3BVSAT terminals that are not equipped with autotracking capability will need toperform antenna alignment when the satellite is near the center of its stationkeepingbox. Satellite position can be calculated using the method described in IESS–412.

3.3.2 Adverse Weather Conditions

In the event of adverse local weather conditions, BVSAT terminals are designed toemploy uplink power control at both C–Band and Ku–Band.

3.3.3 Scintillation Effects

Tropospheric scintillation can occur in C–Band and Ku–Band under both adverseweather and clear–weather conditions. The effects of scintillation may be significanton links having elevation angles less than 20. On links having elevation angles near5, scintillation effects can be severe. As a consequence of scintillation, antennasemploying active tracking on low elevation paths may experience antennamispointing or may transmit excessive EIRP levels when uplink power control isemployed. The use of program tracking is, therefore, highly recommended on linksoperating with elevation angles less than 20 for those periods when troposphericscintillation is severe. Program tracking is also recommended as the primary trackingmethod for antennas with elevation angles below 10.

4. EMISSION CONSTRAINTS

4.1 Off–Axis Emission Constraint and Allowable Connectivity

The maximum EIRP radiated by an earth station is constrained by the off–axisemission density limits of Recommendation ITU–R S.524–5. All of the nominalEIRP requirements shown in Appendix B meet this constraint. BVSAT terminalswhose EIRPs exceed this constraint will not be permitted to operate within theINTELSAT BVSAT system.

4.2 Spurious Emissions (Except Intermodulation Products)

BVSAT services are presently envisioned on INTELSAT VIII, IX and APR–2capacity on SINOSAT–1.


The EIRP outside of the satellite bandwidth unit allocated for BVSAT services, whichresults from spurious tones, bands of noise, or other undesirable signals, butexcluding the multicarrier intermodulation products and spectral spreading due toearth station non–linearities, shall not exceed 4 dBW in any 4 kHz band within thefollowing frequency ranges:

Operating Satellite Frequency Range

INTELSAT VIII, IX & SINOSAT–1 5,850 to 6,425 MHzINTELSAT VIII & IX 14,000 to 14,500 MHz

4.3 Spurious Emissions – Intermodulation Products

The mandatory EIRP limits for intermodulation products resulting from multicarrieroperation of the earth station wideband RF equipment are specified in IESS–401.

4.4 RF Out–of–Band Emission (Carrier Spectral Sidelobes)

To limit interference into adjacent carriers, the EIRP density outside of the satellitebandwidth unit allocated for each carrier resulting from spectral re–growth due toearth station non–linearities measured in a 4 kHz band shall be at least 26 dB belowthe main carrier spectral density when transmitted from a Standard A, B, C, E or Fearth station and at least 23 dB below the main carrier spectral density fortransmissions from a Standard H or K earth station.

5. FREQUENCY TOLERANCES AND SPECTRUM INVERSION

5.1 Carrier RF Tolerance

Although the BVSAT IF equipment has an automatic frequency control (AFC)feature that can automatically maintain the transmit carrier frequency to within acertain limit of its assigned value and assist in the acquisition of a receive carrier, thecarrier frequency tolerance limit specified below shall apply to the frequencyinstability attributable to the earth station RF equipment alone. Improvement realizedin the frequency stability due to the AFC shall not be assumed in the followingspecifications.

The daily transmit RF frequency stability shall be less than ± 1 x 10–7. The dailyreceive RF frequency stability shall be less than ± 25 kHz.


5.2 Satellite Transponder Frequency Tolerance

The translation frequency tolerance due to the satellite should be assumed to be noworse than ± 25 kHz for the INTELSAT VIII, IX and SINOSAT–1 satellites overtheir lifetime. The translation frequency tolerance over any one month is typicallyabout ± 2.5 kHz for INTELSAT satellites and SINOSAT–1.

5.3 Spectrum Inversion

The IDU is capable of operating with either an inverted or non–inverted spectrum.The transmitted RF carrier spectrum shall not be inverted.

6. OPERATIONAL BANDWIDTH AND FREQUENCY RANGE

BVSAT terminals are capable of operating with multiple TDMA carriers byfrequency–hopping between carriers located within an operational bandwidth rangeof 250 MHz. The frequency ranges of operation are as follows:

Uplink Downlink Units

C–Band:

INTELSAT VIII, IX &SINOSAT–1

5,850 – 6,425 3,625 – 4,200 MHz

Ku–Band:

INTELSAT VIII & IX 14,000 – 14,500 10,950 – 11,20011,450 – 11,700

MHz

7. PHASE NOISE

7.1 Earth Station (Transmit)

The single sideband phase noise on the transmitted carrier shall satisfy either of thefollowing two limits:

Limit 1: The single sideband phase noise is assumed to consist of a continuouscomponent and a spurious component. The single sideband power spectral density ofthe continuous component shall not exceed the envelope shown in Figure 9. A


spurious component at the fundamental AC line frequency shall not exceed –30 dBrelative to the level of the transmitted carrier. The single sideband sum (added on apower basis) of all other individual spurious components shall not exceed –36 dBrelative to the level of the transmitted carrier. (The total phase noise including bothsidebands can be up to 3 dB higher.)

or

Limit 2: The single sideband phase noise due to both the continuous and spuriouscomponents integrated over the bandwidth 100 Hz to 0.3 R Hz away from the centerfrequency, where R is the maximum carrier transmission rate in bits per second (afterFEC is applied) that will be transmitted from the BVSAT earth station, shall notexceed 2.2 degrees RMS. The total phase noise due to both sidebands shall notexceed 2.8 degrees RMS.

The option of satisfying either of these two limits has been provided because it isrecognized the phase noise spectrum can have various distributions which, whenintegrated, will have the same overall effect.

7.2 Earth Station (Receive)

The phase noise performance of the earth station shall be consistent with the properoperation of the carrier recovery system of the demodulator given the allowable phasenoise contribution of the corresponding earth station and that expected from thesatellite. Users are referred to the IESS–400 series of modules for information onthe expected phase noise contribution from the satellite. As a minimum, it isrecommended that phase noise requirements, specified in Section 7.1, should also bemet for the earth station receive equipment.

8. CARRIER LINE–UP AND IN–SERVICE MONITORING

It is expected that one or more of the TDMA burst time slots, to be shared by allBVSAT terminals, will be designated by INTELSAT for line–up tests. The fullprocedures covering the BVSAT carrier line–up are contained in SSOG–313.

In–service carrier performance will be monitored via periodic reporting of carrierperformance from the BVSAT traffic terminals to the BNMS. Long–term trendingfor statistical analysis may be performed by the BNMS.


9. INTERFACES

9.1 Indoor Unit (IDU)

9.1.1 70 MHz IF Interface (LINKWAY™2000 Only)

The 70 MHz IF interface between the Outdoor Unit (ODU) and the BVSAT IndoorUnit (IDU) shall comply with the following requirements:

9.1.1.1 Transmit (To ODU)

Center frequency: 70 MHz ± 18 MHz

Characteristic impedance: 75 Ohm

IF Interface Connector: BNC Jack

Return loss: 15 dB minimum

Transmit level range: –25 dBm to –5 dBm

9.1.1.2 Receive (From ODU)

Center frequency: 70 MHz ± 18 MHz


IF Interface Connector: BNC Jack


Receive level: –17 dBm maximum (aggregate)

9.1.2 L–Band IF Interface (LINKWAY™2100 and IP Only)

The L–Band IF interface between the Outdoor Unit (ODU) and the BVSAT IndoorUnit (IDU) shall comply with the following requirements:


9.1.2.1.1 Transmit (To ODU)

Frequency Range: 950 to 1525 MHz


IF Interface Connector: Type N Jack


Transmit level range: –30 dBm to –5 dBm

9.1.2.1.2 Receive (From ODU)

Frequency Range: 950 to 1750 MHz


IF Interface Connector: Type F Jack


Receive level –17 dBm maximum (aggregate)

9.2 Terrestrial Interfaces

The following terrestrial interfaces are available on the BVSAT IDU:

9.2.1 DS3 (44.736 Mbit/s) ATM

Physical: • DS3 (44.736 Mbit/s)

• ANSI T1.107 C–bit and M23 framing

ATM: • ITU–T G.804 mapping (PLCP and direct–mapped)

• ITU–T I.432 compliant

• ATM Forum UNI 3.1 and UNI 4.0compliant

Connector: 2 x 75Ω BNC


9.2.2 E3 (34.368 Mbit/s) ATM

Physical: • E3 (34.368 Mbit/s)

• ITU–T G.703 compliant

• ITU–T G.751 and G.832 framing

ATM: • ITU–T G.804 direct mapping

• ITU–T I.432 compliant

• ATM Forum UNI 3.1 and UNI 4.0compliant

Connector: 2 x 75Ω BNC

9.2.3 Internet Protocol (IP)

Physical: • 10BaseT

• IEEE 802.3 compliant

IP Connector: 6–pin RJ–45 jack

9.2.4 Serial Synchronous

The Serial Synchronous interface supports Frame Relay:

Physical: • 64 to 2048 kbit/s

• RS–449 / RS–422

• RS–530 / RS–422

• V.35

Frame Relay Connector: • 26–pin SCSI connector

• RS–449 37–pin D connector with convertercable


• V.35 connector with converter cable


9.2.5 E1 (2.048 Mbit/s) Interface

The E1 interface supports ISDN PRI and SS7 (associated and non–associatedsignaling):

Physical Layer: • E1 (2.048 Mbit/s)

• ITU–T G.703 and G.704 compliant

• HDB3 and AMI coding

SS7 / ISDN:

SS7 Non–associatedSignaling Connector:

• 26–pin SCSI connector




E1 Connector: • RJ–48C for a 120Ω symmetrical line or

• 2 x 75Ω BNC for a 75Ω coaxial line

9.2.6 DS1/T1 (1.544 Mbit/s)

The DS1/T1 User Interface supports ISDN PRI and SS7 (associated and non–associated signaling):

Physical Layer: • DS1 (1.544 Mbit/s)

• ANSI T1.102, T1.107 and T1.403compliant

• B8ZS or AMI coding

• SF, ESF, and frame formats


SS7 / ISDN:

SS7 Non–associatedSignaling Connector:

• 26–pin SCSI connector




DS1 Connector: RJ–48C for a 120 Ω symmetrical line

10. CONTROL OF TRANSMITTING BVSAT TERMINALS

In view of the numerous earth stations accessing the space segment on a multipleaccess (simultaneous) basis, any variation in transmit RF frequency, transmit EIRP,and antenna tracking could cause interference with other services or cause hazardousconditions in the space segment. Accordingly, it is mandatory that BVSAT terminalsbe controlled at all times to avoid such interference.

This requirement is considered to be satisfied when BVSAT terminals are attended24-hours per day by operating personnel capable of adjusting frequency, EIRP, andtracking, as required. In the event that BVSAT terminals are not manned on a24-hour per day basis, the BNMS will monitor and immediately turn off BVSAT RFcarriers that are interfering with services or creating hazardous conditions in the spacesegment.


Table 1BVSAT Networks – Transponder Assignments

BVSAT Xpdr. FrequencyBeamEdge

BeamEdge

U/LPattern Saturation

D/LPattern

TransponderBackoff

Start of Location Beam Xpdr BW BW Up Down SFD G/T Adv. B.E. EIRP Adv. Input Output

Connectivity Service Sat. (Deg. E) Up Down Bank (MHz) (MHz) (GHz) (GHz) (dBW/m2 ) (dB/K) (dB) (dBW) (dB) (dB) (dB)

Europe / Americas: 3Q2000

Europe to Americas 801 328.5 S2 WH 5–6 12 72 14.205 3.905 –83.0 2.0 +3 34.5 +2 –7.4 –5.5

Americas to Europe WH S2 5–6 12 72 6.130 11.155 –85.7 –8.0 +2 44.0 +3 –4.2 –3.0

Europe Loopback S2 S2 7–9 8 112 14.314 11.514 –83.0 2.0 +3 44.0 +3 –5.5 –3.5

Americas Loopback WH WH 7–8 36 72 6.220 3.995 –83.0 –8.0 +2 34.5 +2 –7.4 –5.5

Europe to Africa S2 EH 5–6 12 72 14.205 3.905 –85.0 2.0 +3 34.5 +2 –7.4 –5.5

Africa to Europe EH S2 5–6 12 72 6.130 11.155 –83.3 –8.0 +2 44.0 +3 –4.2 –3.0

Africa to Africa EH EH 1–2 4 72 5.964 3.739 -79.8 -8.0 +2 34.5 +2 -7.4 -5.5

Pan–Asia: 4Q2000

APR–2 Zone Loopback SINOSAT-1

110.5 Zone Zone 1B 36 36 5.925 3.700 –91.0 –3.0 +1 36.0 +1 –5.2 –4.0

Europe / Asia: 4Q2000

Europe to Asia 804 64 S1 NE 7–8 18 72 14.314 3.995 –79.5 2.0 +3 34.5 +2 –7.4 –5.5

Asia to Europe NE S1 7–8 18 72 6.220 11.514 –80.0 –5.0 +2 44.0 +3 –4.2 –3.0

Asia Loopback NE NE 9 5 36 6.280 4.055 –80.0 –5.0 +2 34.5 +2 –7.4 –5.5

Europe / Middle East: 3Q2001

Europe to Middle East 901 62 S1 S2 9 12 36 14.355 11.555–83.0* 0.0 +3 47.0 +3 –7.0 –5.0

Middle East to Europe S2 S1 9 12 36 14.355 11.555 –83.0* 0.0 +3 47.0 +3 –7.0 –5.0

Europe Loopback S1 S1 10 12 36 14.395 11.595 –83.0* 0.0 +3 47.0 +3 –7.0 –5.0

Middle East Loopback S2 S2 10 12 36 14.395 11.595 –83.0* 0.0 +3 47.0 +3 –7.0 –5.0

* Preliminary assumption only. The proper parameters will be determined following the launch and operation of INTELSAT 901.


Table 2Frame Relay Service Classes Defined In Rec. ITU–T X.146

Class Network support FLRc FTD (ms)

0 Mandatory,default class

No upper bound specifiedon FLRc.

No upper bound specifiedon FTD.

1 Mandatory Value < 1x10–3 and 95thpercentile of weighted

15-minute values < 3x10–3.

95th percentile < 400 ms

2 Optional Value < 3x10–5, and 95thpercentile of weighted

15-minute values < 1x10–4.

95th percentile < 400 ms.

3 Optional Value < 3x10–5, and 95thpercentile of weighted15-minute values for month

< 1 x10–4.

95th percentile < 150 ms


Table 3BVSAT Carrier Performance Objectives

(Through Satellite Channel)

Parameter Units

1. Aggregate User InformationRate per TDMA Carrier*

512 2048 4096 kbit/s

2. TDMA Frame Efficiency† 89.5 89.5 89.5 %

3. TDMA Information Rate 572 2288 4577 kbit/s

4. FEC Rate ½ ½ ½

5. Reed–Solomon Coding (236, 216) (236, 216) (236, 216)

6. Transmit Bit Rate 1.250 5.0 10.0 Mbit/s

7. Transmit Symbol Rate 0.625 2.5 5.0 Msym/s

8. Noise Bandwidth 0.625 2.5 5.0 MHz

9. Allocated Bandwidth‡ 832.5 3262.5 6502.5 kHz

10. Threshold (MinimumPerformance):

– BER– Eb/No– C/T

10–8

5.8–165.2

10–8

5.5–159.5

10–8

5.5–156.5

dBdBW/K

11. Margin to Threshold:

– C–Band: 1.0 1.0 1.0 dB

– Ku–Band: 3.0 3.0 3.0 dB

12. Clear–Sky Performance

– BER

– C/T: C–Band

Ku–Band

< 10–10

–164.2

–162.2

< 10–10

–158.5

–156.5

< 10–10

–155.5

–153.5

dBW/K

dBW/K

13. Link Availability (w.r.t.Threshold) 99.6 99.6 99.6 % of year

* The Aggregate User Information Rate per TDMA carrier is equal to the TDMA Information Rate times

the TDMA Frame Efficiency. Since the TDMA frame efficiency is an approximation (see footnotebelow), the Aggregate User Information Rate is also an approximation. The summation of all circuitsin a TDMA carrier will be less than or equal to the rates shown.

† The TDMA frame efficiency shown is an approximation only. It excludes frame overheads,guardtimes and protocols. The actual frame efficiency will vary depending on the mix of networkprotocols supported by the RF carrier.

‡ The allocated bandwidth is equal to 1.3 x carrier symbol rate, rounded to the nearest odd integermultiple of 22.5 kHz.


Table 4EIRP Stability Requirements

Earth Station Maximum Permitted EIRPVariation

(dB)

A ±0.5

B ±0.5

C ±0.5

F–3 ±1.5

F–2 ±1.5

F–1 ±1.5

H–4 ±1.5

H–3 ±1.5

H–2 ±1.5

K–3 ±1.5

K–2 ±1.5


Figure 1Europe / Americas Network – Europe Coverage Diagram

View : Orthographic 48.13° N 6.58° EStatus : INTELSAT APPROVED

Plot Date: 15 May 2000pc5f13\iess313-f1.apr

Ñ

+6

+5

+4

+3

+2

+10

-1-2

EL=0°

EL=5°

EL=10°

30°N

60°N

330°E

0°E

30°E

60°E

NOTE: In deriving the nominal uplink EIRP requirements for BVSAT terminals, an uplink and downlink pattern advantage of 3 dB was assumed for Ku–Band.For BVSAT terminals located outside the assumed beam pattern coverage, Users must use, as a minimum, a Standard E–1.


Figure 2Europe / Americas Network – Americas Coverage Diagram



+4

+3

+2+4

+4

+4

+3

+2

0

-2

300°E 330°E270°E240°E 0°E

0°N

30°N

60°N

30°S

60°S

EL=0°

EL=5°

EL=10°

NOTE: In deriving the nominal uplink EIRP requirements for BVSAT terminals, an uplink and downlink pattern advantage of 2 dB was assumed for C–Band.For BVSAT terminals located outside the assumed beam pattern coverage, Users must use, as a minimum, a Standard H–4.


Figure 3Europe / Africa Network – Africa Coverage Diagram



+4

+3

+3

+3

+2

+3

+3

+2

+10

-2

0°E330°E

300°E

30°E

60°E

60°N

30°N

0°N

30°S EL=10°

EL=5°

EL=0°

NOTE: In deriving the nominal uplink EIRP requirements for BVSAT terminals, an uplink and downlink pattern advantage of 2 dB was assumed for C–Band.For BVSAT terminals that are located outside the assumed beam pattern coverage, Users must use, as a minimum, a Standard H–4.


Figure 4Pan–Asia Network – C–Band Coverage Diagram(APR–2 Capacity on SINOSAT–1 @ 110.5ºE)

View : Orthographic 110.5° EStatus : INTELSAT APPROVED

Plot Date: 23 August 2000pc5f13:IAP111ZB.txt

9 8 7 6 5 4 3 2 1 S 1 2 3 4 5 6 7 8 9

9 8 7 6 5 4 3 2 1 N 1 2 3 4 5 6 7 8 9

9

8

7

6

5

4

3

2

1

W

1

2

3

4

5

6

7

8

9

9

8

7

6

5

4

3

2

1

E

1

2

3

4

5

6

7

8

9

ZB

7110.5° E

Ñ

NOTE: In deriving the nominal uplink EIRP requirements for BVSAT terminals, an uplink and downlink pattern advantage of 1.0 dB was assumed for theAPR–2 capacity on SINOSAT–1.


Figure 5Europe / NE Asia Network – Europe Coverage Diagram



+7

+6

+5+4

+3+2 +1 0 -1 -2

EL=0°

EL=5°

EL=10°

330°E

0°E30°E

60°E60°N

30°N

300°E



Figure 6Europe / NE Asia Network – NE Zone Coverage Diagram



Ñ+6

+5

+4

+4

+3

+2

+1

0

-1

-2

EL=10°

EL=5°

EL=0°

90°E120°E

150°E

60°E

30°E

30°N

0°N

60°N

NOTE: In deriving the nominal uplink EIRP requirements for BVSAT terminals, an uplink and downlink pattern advantage of 2 dB was assumed for C–Band.For BVSAT terminals located outside the assumed beam pattern coverage, Users must use, as a minimum, a Standard H–4.


Figure 7Europe / Middle East Network – Europe Coverage Diagram



+5+4

+3+2

+10-1-2

330°E

0°E

30°E

60°E

60°N

30°N

0°N

90°E

EL=0°

EL=5°

EL=10°



Figure 8Europe / Middle East Network – Middle East Coverage Diagram



+4

+3

+2

+1

0

-1

-2

30°E 60°E

30°N

60°N



Figure 9Single Sideband Phase Noise Spectral Density

APPENDIX A toIESS–313 (Rev. 1)

Page A-1

APPENDIX A

ITU REFERENCES

Radiocommunication Sector Recommendations:

Rec. ITU–R S.524–5 Maximum permissible levels of off-axis e.i.r.p. density from earth stations inthe fixed satellite service transmitting in the 6 and 14 GHz frequency bands,11/93

Telecommunication Standardization Sector Recommendations:

Rec. ITU–T G.703 Physical/electrical characteristics of hierarchical digital interfaces, 10/98

Rec. ITU–T G.704 Synchronous frame structures used at 1544, 6312, 2048, 8448 and44,736 kbit/s hierarchical levels, 10/98

Rec. ITU–T G.751 Digital multiplex equipments operating at the third order bit rate of34,368 kbit/s and the fourth order bit rate of 139,264 kbit/s and using positivejustification, 11/88

Rec. ITU–T G.804 ATM cell mapping into the plesiochronous digital hierarchy (PDH), 02/98

Rec. ITU–T G.832 Transport of SDH elements on PDH networks – Frame and multiplexingstructures, 10/98

Rec. ITU–T I.432 B–ISDN User–Network Interface – Physical layer specifications, 02/99

Rec. ITU–T X.146 Performance objectives and quality of service classes applicable to framerelay, 09/98

APPENDIX B toIESS–313 (Rev. 1)

Page B-1

APPENDIX B

Nominal EIRP Requirements for BVSAT Terminals


Page B–2

Table B.1BVSAT Terminal Nominal EIRP Requirements for Operation with INTELSAT 801

(328.5ºE Longitude, C–Band Downlinks, dBW)

Receive Earth Station

Beam

Carrier

Symbol Rate

(Msym/s) A B F–3 F–2 F–1 H–4 H–3

0.625 49.3 49.9 50.6 51.8 54.3 54.9 57.9

WH–to–WH 2.500 55.1 55.5 56.3 57.5 60.0 60.7 64.1

5.000 58.1 58.5 59.3 60.5 63.0 63.7 67.1

0.625 49.5 50.2 51.2 52.4 55.3 56.0 59.0

Spot 2–to–WH 2.500 55.3 56.0 56.9 58.2 61.0 62.0 65.7

5.000 58.3 59.0 59.9 61.2 64.0 65.0 68.7

0.625 48.9 49.5 50.2 51.3 53.7 54.4 57.4

Spot 2–to–EH 2.500 54.7 55.3 55.9 57.0 59.5 60.0 63.7

5.000 57.7 58.3 58.9 60.0 62.5 63.0 66.7

0.625 50.6 51.5 52.5 53.9 56.9 57.7 60.7

EH-to-EH 2.500 56.4 57.2 58.3 59.7 62.8 63.5 66.5

5.000 59.4 60.2 61.3 62.7 65.8 66.5 69.5


Page B-3


(328.5ºE Longitude, Ku–Band Downlinks, dBW)

Receive Earth StationBeam

Carrier

Symbol Rate(Msym/s) C E–3 E–2 E–1 K–3

0.625 49.6 49.7 50.6 51.8 52.7

WH–to–Spot 2 2.500 55.4 55.5 56.3 57.6 58.4

5.000 58.4 58.5 59.3 60.6 61.4

0.625 50.7 50.9 51.9 53.5 54.6

EH–to–Spot 2 2.500 56.4 56.6 57.7 59.4 60.4

5.000 59.4 59.6 60.7 62.4 63.4

0.625 49.4 49.7 51.2 53.1 54.1

Spot 2–to–Spot 2 2.500 55.1 55.5 57.0 58.9 59.9

5.000 58.1 58.5 60.0 61.9 62.9


Page B–4

Table B.3BVSAT Terminal Nominal EIRP Requirements for Operation with APR–2 Capacity

[SINOSAT-1 @ 110.5º East Longitude, C–Band (Linear Polarization), dBW]


Carrier

Symbol Rate(Msym/s) A B F–3 F–2 F–1 H–4 H–3

0.625 47.6 47.8 48.0 48.7 50.0 50.2 52.3

Zone–to–Zone 2.500 53.3 53.5 53.7 54.5 55.9 55.9 58.5

5.000 56.3 56.5 56.7 57.5 58.9 58.9 61.5


Page B–5


(64º East Longitude, C–Band Downlinks, dBW)


Carrier

Symbol Rate(Msym/s) A B F–3 F–2 F–1 H–4 H–3

0.625 51.1 52.2 53.5 55.0 58.3 59.1 62.5

Spot 1–to–NE 2.500 56.8 57.9 59.2 60.8 64.0 65.0 69.2

5.000 59.8 60.9 62.2 63.8 67.0 68.0 72.2

0.625 51.4 52.0 52.9 54.2 56.9 57.9 60.9

NE–to–NE 2.500 57.1 57.8 58.7 60.0 62.6 63.7 67.1

5.000 60.1 60.8 61.7 63.0 65.6 66.7 70.1


Page B-6


(64º East Longitude, Ku–Band Downlinks, dBW)


Carrier


0.625 52.3 52.6 53.9 56.2 57.4

NE–to–Spot 1 2.500 58.1 58.3 59.7 61.9 63.2

5.000 61.1 61.3 62.7 64.9 66.2


Page B-7

Table B.6BVSAT Terminal Nominal EIRP Requirements (Provisional) for Operation with INTELSAT 901

(62º East Longitude, dBW)

Receive Earth StationConnectivity

Carrier


0.625 49.1 49.2 50.2 51.3 52.0

Spot–to–Spot 2.500 54.8 55.0 55.9 57.1 57.7

5.000 57.8 58.0 58.9 60.1 60.7

APPENDIX C toIESS–313 (Rev. 1)

Page C–1

APPENDIX C

REVISION HISTORY

Revision No. Approval Date Major Purpose

Original 11 May 2000 • New module.

A 08 Aug 2000 • Add APR–2 capacityassignment on SINOSAT–1at 110.5 degrees Eastlongitude (Table 1)

• Add earth station nominalEIRP requirements forAPR–2 capacity (Table B.3)

1 20 Nov 2000 • Clarify BVSAT servicecapabilities versus servicesbeing offered.

• Delete 312 ksymbol/s carriersize.

• Revise the carrier RFtolerances to conform withthe BVSAT vendor’sspecifications.

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