Alcatel 9600 LSY STM-1/0 LONG HAUL DRRS GHz

Transcription

1 Alcatel 9600 LSY STM-1/0 LONG HAUL DRRS GHz 3DB AAAA Ed.05 October 2004

2 Contents Page 1 Introduction Application LSY Family Key Success Factor General System Description Station Types Configurations Modulation type Frequency reuse Bit rate capacity Protection User interfaces Auxiliary Service Channels Operating and maintenance features TMN platform System Controller Management Maintenance policy Installation and commissioning Standard Multichannel System Architecture Transceiver assembly Baseband - Modem subrack Branching Top Rack Unit (T.R.U.) Compact System Architecture Technical Characteristics Glossary DB AAAA Ed05

3 1 Introduction The 9600 LSY digital radio relay system belongs to the second generation of the Alcatel SDH (Synchronous Digital Hierarchy) radio family that has been developed aiming to match the demand of high quality microwave transmission links and following the SDH standards defined by International Organizations as ITU-T, ITU-R and ETSI. Special attention concerning the network management standards and its integration into a SDH based network has been paid. Big efforts have been done to expand as much as possible the versatility of the new radio family and the full compatibility with the optical systems to ensure the utilization of the radio media as natural complement to the optical fiber transmission. A 9600 LSY radio system can be in fact utilised either with multiplex section termination (MST) or regenerator section termination (RST) functionality, can be used for optical loop closures or for fiber optic back-up, for spurs or for backbone links and, in general, in all the network interconnections where the advantages due to an easy installation, a bringing-to-service operations and time and cost saving solution are requested. The family supports radio transmission of STM-0 (51 Mbps) and STM-1 (155 Mbps) signals as well STM-4 (622 Mbps) or STM-16 (2.4 Gbps) connections, using a proper number of radio frequency channels in various configurations. A full set of synchronous and plesiochronous interfaces is available. The 9600 LSY series features the 128 QAM modulation offering excellent spectrum efficiency and covering the 4, U4, L6, U6, 7, 8, 10, 11 and 13 GHz frequency bands. A modulator 64 QAM is also available on the frequency band 4, U4, U6, 11 GHz offering a better system gain. By means of the new 9600 LSY family, Alcatel intends to answer the growing demand of transmission capacity either for traditional telephone services or for the new data-oriented services (including ATM + IP networks, LAN/WAN networks) or for the evolution of the cellular market. 3DB AAAA Ed.05 3

4 2 Application The new generation of radio transmission system Alcatel 9600 LSY family is specifically designed for catching principally two main objectives: on one side to provide a radio solution for long distance links where large configurations are required to fulfill the high capacity transmission needs; on the other side to guarantee link quality as high as possible, using, where required, the same sites and infrastructures utilized for the previous generation equipment. The achievement of these objectives has given the possibility to the new equipment to be widely utilized in a large number of applications, including: New full radio infrastructure Closure of STM1, STM4 and STM16 fiber optic rings Back-up to fiber optic trunk links Radio spurs of fiber/radio at STM-n level Utilization as backbone link in national trunk networks Interconnection of cellular networks with public switched networks. Figure 1 shows some of these applications. Figure LSY family applications 4 3DB AAAA Ed05

5 LSY Family Key Success Factor The new Alcatel 9600 LSY family exploits the experience gained with the previous SDH generations of radio equipment and, thanks to the deep utilisation of all technological possibilities and to new hardware and software developments, some key success factors have been achieved pursuing to provide an innovative answer to the most recent market requirements: Total interworking with other kinds of network elements present in the network, aiming to make the network independent from transmission medium. Full integration in the Alcatel network management platform able to manage different types of network elements belonging to different technologies: OMSN, LT, OMSG, microwave radios, optical systems and submarine systems LSY is included in Alcatel network release plan, guaranteeing consistent feature support and allowing, in case of existing SDH NEs, not to change TMN platform, thus saving investments already done. Double identity of the equipment that can be inserted in the SDH network as: Radio regenerator to be easily introduced in transparent mode without affecting any modifications to the network. Wireless Multi Service Node (WMSN) that can be considered as full performance OMSN or LT with different synchronous physical interface: radio instead of fibre. Transmission capacity easily selectable between STM0 and STM1 according to the bandwidth availability and, if necessary, following an incremental approach. High integration of the full indoor structure with very compact size: - configurations up to 7+1/8+0 terminal are housed inside a single ETSI rack. - configurations 1+0, 1+1 and 2+0 can be installed in a single subrack assembly not expansible to higher configurations. Usage of 128 QAM as standard modulation, improving the spectrum efficiency in all the radio frequency bands; A 64 QAM modulator is also available. 3DB AAAA Ed.05 5

6 Adoption of CCDP (frequency reuse) technique as option for all the supported frequency bands, allowing the transmission of 2x STM-1 per channel. Space Diversity reception as countermeasure against fading exploiting the new baseband combiner. Transmission of auxiliary traffic of one 2 Mbit/s Way Side Traffic per RF channel, using RFCOH bytes. Further powerful multipath countermeasures: multichannel hitless switch, transversal equaliser, configurable ATPC functionality, multileved coded modulation. High reliability in order to minimise field intervention. Fully software configurable terminals with software download capabilities. The characteristics Alcatel 9600LSY are compliant with current SDH standards defined within the International Organisations ITU-T, ITU-R and ETSI, with special attention to those standards concerning the network management and its integration into SDH based network. 6 3DB AAAA Ed05

7 4 General System Description 4.1 Station Types The Alcatel 9600 LSY family covers the radio point to point applications supporting the following frequency bands: 4.0 GHz (9640 LSY) 4.7 GHz (9647 LSY) 6.2 GHz (9662 LSY) 6.7 GHz (9667 LSY) 7 GHz (9674 LSY) 8 GHz (9681 LSY) 10 GHz (9610 LSY) 11 GHz (9611 LSY) 13 GHz (9613 LSY) The Alcatel 9600 LSY systems offer a full set of system configuration and protection schemes to meet any specific need in a network with a high degree of flexibility. Two are the envisaged station types, each supplying different functionality. Regenerator station (RST) is needed when the RSOH termination and MSOH transparency are requested. I/O network interface is STM-1 electrical or optical. Multiplex station (MST) is necessary when a Wireless Multiservice Node (WMSN) (one side or two sides) has to be implemented. In this case the MST station is used at the terminal ends of the radio link and it gives the possibility to provide synchronous STM-1 electrical and optical interfaces and plesiochronous 140 Mbit/s, 3x45 Mbit/s, 3x34 Mbit/s, 63x2 Mbit/s interfaces. It is possible to implement a full multiplex section features like synchronisation, SOH termination, network protection (SNCP/I, SNCP/N and linear MSP), VCs cross connection, tributary add-drops. 3DB AAAA Ed.05 7

8 4.2 Configurations The 9600 LSY family allows the radio transmission of both STM-1 and STM-0 utilising protected and unprotected heterofrequency configurations. Two are the available versions of 9600LSY equipment that thanks to the high integration level allow to provide several types of configurations allowing to address different network applications: - a standard multichannel version - a new compact version for 1+0, 1+1 and 2+0 configurations. For both cases, the developped configurations are hereafter listed. Multichannel version (max configuration): Terminal regenerator in 1 ETSI rack Terminal regenerator in 1 ETSI rack Terminal WMSN in 1 ETSI rack Terminal WMSN in 1 ETSI rack - 2x(7+1) Terminal regenerator or WMSN CCDP in 2 ETSI racks A terminal can be configured as a WMSN simply adding a 1650 SMC device to the radio regenerator equipment. Each configuration is easily expansible to a higher capacity just adding the foreseen expansion kits. In Figure 2 - part A and B - a view of a 8 channel regenerator terminal and a 8 channel WMSN are respectively shown. Compact version: Terminal regenerator in 1 subrack Terminal regenerator in 1 subrack Terminal regenerator in 1 subrack HST Terminal regenerator in 1 subrack CCDP Terminal regenerator in 1 subrack Also in this case, terminals can be used as WMSN just adding 1650 SM-C device to the terminal regenerator. In a single 2200 mm rack, three different 1+0, 1+1 or 2+0 regenerator terminals can be housed (fig. 2C); only two in case of WMSN configuration (fig. 2D). The compact subracks are shown installed inside the 2200 mm Optinex rack. Also the installation inside a 19 ETSI rack is allowed. 8 3DB AAAA Ed05

9 Part. A LSY 8+0 / 7+1 terminal regenerator configuration. Part. B LSY 8+0 / 7+1 WMSN Part. C LSY compact 3x1+1 terminal regenerator configuration. Part. B LSY compact 2x1+1 terminal WMSN configuration. Figure LSY 3DB AAAA Ed.05 9

10 In the next Figure 3, the block diagram of a 7+1 regenerator is shown. STM -1 USER IN T/R ST MODEM TRANSCEIVER STM -1 STM -1 STM -1 STM -1 STM -1 STM -1 USER IN T/R ST USER IN T/R ST USER IN T/R ST USER IN T/R ST USER IN T/R ST USER IN T/R ST RADIO PROTECTION SWITCHING MODEM MODEM MODEM MODEM MODEM MODEM TRANSCEIVER TRANSCEIVER TRANSCEIVER TRANSCEIVER TRANSCEIVER TRANSCEIVER MODEM TRANSCEIVER Figure LSY 7+1 Regenerator configurations Next Figure 4 shows a block diagram illustrating a Wireless Multiservice Node for 7 STM-1 transmission configured with radio protection (RPS) implementing a 7+1 radio configuration. 7X STM-1 or 140 or 3x45 or 3x34 or 63x2 Mb/s OMSN TRAF.PORT AGGREG. TRAF.PORT AGGREG. TRAF.PORT AGGREG. TRAF.PORT AGGREG. TRAF.PORT AGGREG. TRAF.PORT AGGREG. TRAF.PORT AGGREG. RST RST RST RST RST RST RST RADIO PROTECTION SWITCHING REGENERATOR MODEM TRANSCEIVER MODEM TRANSCEIVER MODEM TRANSCEIVER MODEM TRANSCEIVER MODEM TRANSCEIVER MODEM TRANSCEIVER MODEM TRANSCEIVER MODEM TRANSCEIVER Figure LSY WMSN-OS 7+1 configuration. In the next figure the block diagram of a Compact 1+1 heterofrequency regenerator with one protected STM-1 stream and a second occasional STM-1 is presented. 10 3DB AAAA Ed05

11 Figure LSY 1+1 compact regenerator block diagram 4.3 Modulation type Two modulation scheme have been adopted for the equipment belonging to the 9600 LSY family :128 QAM and 64 QAM cross modulation. The high number of levels utilised in 128 QAM allows to obtain a high spectrum efficiency that allows the utilisation of the following channel spacing : 28 MHz, 29 MHz, MHz, 30 MHz and 40 MHz for STM-1 capacity (co-polar and alternate polar) 14 MHz (alternate polar) or 28 MHz (co-polar) for STM-0 capacity. With the 64 QAM modulation a 40 MHz channel spacing is required. 4.4 Frequency reuse The way utilised by Alcatel to improve the spectrum efficiency is based on the Co-Channel Dual Polarisation (CCDP) technique. This technique, consisting in transmitting two different STM- 1 channels on each radio channel utilising two different antenna polarisation, has been consolidated in the recent past by means of field proven results. In order to meet ITU-R transmission quality objectives also in unfavourable propagation condition causing XPD degradation, Cross-polar Interface Canceller (XPIC) device is adopted to minimise the negative effects of the cross-polar interference signal, assuring an improvement factor of approx. 18 db to the cross polar antenna discrimination. The function is implemented in an optional additional card to be plugged on each couple of demodulator boards of reused channels. Particular attention has been paid to the scalability of the system, allowing the extension of a deployed alternate polar (AP) system to a CCDP reused system only when necessary and consequently to a progressive investment. Two possible ways of extension and configurations are available: 3DB AAAA Ed.05 11

12 4.5 Bit rate capacity 4.6 Protection CCDP configurations using 2 protection channels up to 2x(7+1) CCDP configurations using only 1 protection channel up to 7 working channels plus 1 stand-by. The frequency reuse is applicable to STM-1 streams in all the frequency bands and with all the channel spacing foreseen in the ITU-R recommendations, while it is not available in case of STM-0 transmission. The CCDP configuration is available for both standard and compact versions. The 9600 LSY family allows the transmission of STM-1 signals for all frequency bands from 4 to 13 GHz and STM-0 for 7, 8 and 13 GHz bands, according to the customer needs. The system allows an easy migration from STM-0 to STM-1 when the traffic and the band requirements are going to change. Auxiliary traffic can be added by means of RFCOH bytes corresponding to one 2 Mbit/s Way Side Traffic in STM-1 case. Way Side Traffic in STM-0 case is not available. Different protection types are available for the 9600 LSY systems: Radio Protection and Network Protection. Radio Protection (RPS). The high capacity long haul radio systems utilise, to perform the automatic protection of the radio channels, a multichannel switching device moving the channel to be protected on a spare bearer (standby channel). The function, implemented on the RX side is N+1 hitless type; it is transparent to other types of protection and in particular to network protection. The switch supplies the protection of the link either in case of failure of the equipment or for improving the quality performances of the link. In this last case the Early Warning criteria are utilised to achieve an error free changeover. The same type of RPS is used also in the 1+1 compact version. Moreover, for this last version, also the 1+1 Hot Standby protected configuration is available. Network Protection: for network protection the radio system in regenerator section configuration (RRA) will be fully transparent to APS channel and criteria allowing the OMSNs present in the network to perform the network protection activity. On the other hand the radio system in multiplex section configuration (WMSN) implements, as embedded function, network protection features like Trail protection and sub-network protection (APS, SNC-P etc.). 12 3DB AAAA Ed05

13 4.7 User interfaces In the following table the available users interfaces are listed depending on the 9600 LSY station types (Regenerator or WMSN). INTERFACES REGENERATOR WMSN STM-1 STM-0 STM-1 STM-0 STM-1 ELECTRICAL G.708 X X (STM-1 sub-equipped) X X (STM-1 sub-equipped) STM-1 OPTICAL S1.1 G.957 X X (STM-1 sub-equipped) X X (STM-1 sub-equipped) STM-1 OPTICAL L1.1 G X --- STM-1 OPTICAL L1.2 G X Mbit/s G X x 45 Mbit/s G X X (1 x 45 Mbit/s) 3 x 34 Mbit/s G X X (1 x 34 Mbit/s) 63 x 2 Mbit/s G X X (21 x 2 Mbit/s) Table LSY user interfaces 3DB AAAA Ed.05 13

14 4.8 Auxiliary Service Channels In addition to the main signal, the 9600 LSY family supplies the interfaces to the following service channels: 1 x 9600 baud with interface V24/V28 (selectable) 3 x 64 Kb/s G.703 (one is 64/128 Kb/s selectable) 3 x 64 Kb/s V11 1 voice frequency (E1) 3 ports voice frequency party line (E1) 1 voice frequency (point to point only between adjacent radio sections). Among them it is possible to select, by software presetting, up to 6 x 64 Kbit/s channels plus one voice frequency channel (EOW), to be transmitted radio side in 1+1 protected way. They can be dropped and inserted in every radio station. Other channels, dedicated to specific radio functionality, are inserted in RFCOH frame, without affecting standard SOH frame: DSI channel (used for multiline switching) ATPC channel Monitoring Channel (used for transmitting switching criteria) One WST service stream at 2 Mb/s. The protection of WST service stream is achieved only on channels 0 and 1. Other streams inserted in the radio channels are unprotected. The SOH byte allocation is performed according to ITU-T and ITU-R recommendations and, in Table 2, the SOH usage is summarised. BYTE Utilisation Note A1,A2 Frame alignment RST & MST B1 RST Bit error monitor RST & MST B2 MST bit error monitoring MST J0 Channel identification RST & MST D1 to D3 DCCr RST & MST D4 to D12 DCCm MST E1 RST OW RST & MST E2 MST OW MST F1 Data channel RST & MST * Future standardisation Available to the user K1,K2 APS channel MST MSU Media spec. Usage Available to the user NU National Usage Available to the user S1 Synchronisation Status MST M1 Monit. Far End MST Z1,Z2 Not defined MST Table 2. Byte utilisation 14 3DB AAAA Ed05

15 5 Operating and maintenance features 5.1 TMN platform The 9600 LSY is fully integrated in the Alcatel Network Management platform built by 1353 SH Element Manager and 1354 RM subnetwork manager; the Alcatel platform is able to manage different types of network elements belonging to different technologies: ADM, LT, Cross-Connect, Microwave Radios, Optical Systems and Submarine Systems. SML NML 1354NN SNML EML TSD-IM SEN-IM 1354RM 1353SH ECT TSD-IM ECT ECT TSD-IM QB3 ECT F F F NEs DXC ADM MICROWAVE Others NEs 9600 LSY Figure 6. Alcatel Network Management platform 5.2 System Controller Management The Alcatel 9600 LSY systems are equipped with a System Controller unit (SC). This unit collects alarms and measurements from the equipment and makes them available for the system managing. In detail, SC performs the following main functions: Data collection and exchange with radio system units (SEMF) DCC management (MCF) Provision of local operator F interface by means a personal computer (ECT/RECT) Provision of TMN interface based on QB3 Discrete alarms and controls management Remote Inventory management 3DB AAAA Ed.05 15

16 5.2.1 DCCR and DCCM Management The System Controller housed on the 9600 LSY systems manages the DCCM and DCCR bytes. The DCCM constitutes a Data Communication Channel for TMN information suitable for multiplex section; the DCCR constitutes a Data Communication Channel suitable for regeneration section. In protected configuration the DCCM and DCCR are sent in twin path between channel 1 and the protection channel ECT/RECT and QB3 feature The ECT/RECT craft terminal represent the local network element manager for the Alcatel 9600 LSY family; it is part of Alcatel s network management solution for the operation of SDH transmission network. The Element Manager (1353 SH) and the Regional Manager (1354 RM) connected to the 9600 LSY equipment through a QB3 interface, provide a complete end-to-end sub-network management solution in transmission network. The Craft Terminal and QB3 are based Information Model compliant with ETSI standard. The Craft Terminal provides the following functions: Single or multiple equipment management (Remote Craft Terminal application) Local SW down loading and Remote SW downloading from OS QB3 LAN interface Administrative function Security management to take care of the data integrity and operator access Alarm Surveillance Configuration alarm severity Configuration Management Performance Monitoring according to ITU-T G.826/G.829 & G784 Remote Inventory I/O housekeeping, summarising alarms and equipment discrete alarms management Loopback management (near end/far end) BER measurement and analogue measurement (Tx/Rx Power level) 16 3DB AAAA Ed05

17 Frequency agility management Discrete alarms/environmental alarms The Alcatel 9600 LSY systems can manage/provide, through the System Controller unit, some discrete alarms and controls: Alarms & Controls Regenerator WMSN Summary alarms (outputs) Housekeeping (inputs station alarms) Housekeeping (outputs station controls) Table 3. Alarms and controls The electrical characteristics for alarms and control (V in the voltage between the warm wire and the common one) are: - open contact: ±72 V ±2V I 0.2mA - closed contract: ±2 V 0V I 50mA The presence of active alarm or control corresponds to closed relay contacts with a common wire available to the customer. 5.3 Maintenance policy 5.4 Installation and commissioning The maintenance philosophy for the 9600 LSY equipment foresees that a fault of the system is indicated through local and concentrate visual indications (led) and reported also to ECT and OS. For each replaceable units of the system a red alarm led is present on the front plate to signal the faulty condition; the single alarm indications are grouped together to activate some summarising led alarm like Internal, Urgent, Not Urgent, Indicative, Abnormal, etc. In such a condition the maintenance procedure continues with the identification of the problem by connecting the Craft Terminal to the equipment and with the replacement of the faulty unit if any. No particular operations of routine maintenance are foreseen for the 9600 LSY equipment; periodical checks can be easily performed with the aid of the Craft Terminal. The high integration degree achieved in the development of the radio station has reduced the quantity of cable connections among the various functional blocks, giving benefits from the point of view of the easy installation and the time for bringing-to-service the link. The local interface of the terminal (ECT) gives an easy and fast possibility to the control and the monitoring capability both on the local and remote stations, supplying a further advantage on the quality of the measurement on the link and a fast response in case of fault location necessity. 3DB AAAA Ed.05 17

18 6 Standard Multichannel System Architecture The Alcatel 9600 LSY multichannel system architecture, based on a full indoor structure, foresees the distribution of the various functions in different blocks that are hereafter listed: Radio transceiver including all the RF parts. Baseband-Modem subrack housing all the Base Band, Modem, Service and Management parts Branching assembly Top Rack Unit (TRU) for power supply distribution and protection. In Figure 7, the allocation of the various subracks housed inside the rack is shown, both in case of 7+1 regenerator and 7+1 WMSN terminal station. Figure 7. Regenerator and WMSN station in 7+1 configuration. 18 3DB AAAA Ed05

19 6.1 Transceiver assembly The dimensions of the transceiver mechanical assembly are the following: 530 mm (w) x 470 mm (h) x 240 mm (d) A detailed view of the structure, fully equipped with 10 transceivers is shown in the next Figure 8. Figure 8. Transceiver subrack. Each transceiver module is inserted in a vertical dedicated slot. The coaxial connections with Rx and Tx branching units are located at the top and bottom positions of each transceiver. Each module is equipped with the following units: Transmitter Receiver Tx Local Oscillator Rx Local Oscillator DC/DC converter 3DB AAAA Ed.05 19

20 A simple block diagram, illustrating the main functions performed by transceiver module, is shown in the following figure 9. TRANSCEIVER IF TX IF TX TRANSMITTER RF RF TX TX L.O. DC/DC CONVERTER RX L.O. IF RX IF TX RECEIVER RF RF RX Figure 9. Single channel transceiver block diagram. The transmitter includes an IF amplifier, a SSB upconverter, a local oscillator and a RF power amplifier. The utilisation of a high rejection SSB up-converter permits to avoid the use of a RF filtering at the up-converter output, allowing a wide-band utilisation of the unit. In the configurations higher than 1+1, a low profile fan subrack is utilised for maintaining the temperature inside the rack at normal value. The Automatic Transmitted Power Control (ATPC) function is included in the transceiver in order to decrease the Tx power output and dissipation in case of normal propagation and to push the maximum power up in deep fading conditions. This function may be disabled and the level of the transmitted RF power can be manually forced by means of Craft Terminal configuration. The receiver includes a low noise RF preamplifier, an automatic imagine rejection down converter, an IF filter, a main amplifier with AGC and a local oscillator. A space diversity receiver, to be used in junction with a baseband signal combiner, is also available as countermeasure to the selective fading due to the multipath propagation of the signal. The advantages obtained by the baseband combiner utilisation are mainly due to a higher reliability, thanks to 20 3DB AAAA Ed05

21 6.2 Baseband - Modem subrack the adopted digital technology, to the possibility of recovering very high delays between the two received signals and to the very reduced signature of the combined signal. The baseband-modem subrack accommodates in the bottom part of the shelf the channel-depending units, used both in regenerator terminal and in WMSN stations. The upper right area of the shelf is dedicated to the insertion of the 1650 SM- C device, needed in case of WMSN terminal to implement multiplexing functionality. In regenerator terminal case, this unused area is empty. The physical dimensions of the subrack are: 490 mm (w) x 500 mm (h) x 250 mm (d). In the left side of the shelf the system common units are accommodated: the system controller (SC), the service channel unit. The channel-depending units are built by the modem units and the RRA units. The RRA board performs the following main functions : STM-1 bi-directional interface, electrical or optical selectable by means of interchangeable plug-ins Extraction/Insertion RSOH line side to/from Aux. Service Board Hitless Switch functionality The RRA STBY board hosts the switching logic function dedicated to the switching criteria management of the N+1 hitless radio protection. The Modem board performs the following main functions: Terminal modulator Terminal demodulator XPIC/baseband signal combiner Two different modems are available for STM-1 and STM-0 capacity. The first also allows the transmission of a single 2 Mb/s WST service stream. This service stream can be transmitted in unprotected way, one for each radio channel, by means of the interfaces (1.0/ Ohm coax male connectors) allocated in the access area of the subrack. The possibility to transmit one 2Mb/s WST stream in protected way (on channels 0 and 1 ) is also given. In this case the access is located on the front panel of Service unit that hosts the WST switching functionality. By SW it is also possible to choose the couple of radio channels to transmit the protected WST stream. 3DB AAAA Ed.05 21

22 The Service board provides also the external access to the auxiliary service channels (see par. 4.8), utilising SUB-D connectors. Moreover the unit manages the ATPC functionality. 22 3DB AAAA Ed05

23 The System Controller unit is devoted to the equipment management. It exchanges alarms, commands and management information with the other units of the equipment and provides the following interfaces for local and remote management: Channel communication for TMN utilising a Q3 interface (BNC connector) info model based F interface (RS232 toward the local PC) (SUB-D 9 pin connector) towards Local Craft Terminal QECC interface for remote management through DCC channels. Each Power Supply unit supplies the secondary voltages, starting from the primary voltage -48 to 60 Vdc (±20%) to the couple of Modem and RRA units relevent to every single channel. The P.S. probeetion is actived between each comple of two adjacent units. The common units (system controller and service) are powered, in protected way, by two DC/DC converters contained in Filter1 and Filter2 units. The system can also be powered by batteries with different voltage: ±24 Vdc (±20%). In this case, a on-purpose designed DC/DC converter has to be installed in the lower area of the rack Regenerator Configuration In the following Figure 10, the photograph of the basebandmodem subrack is shown. Figure 10. Baseband-modem subrack. 3DB AAAA Ed.05 23

24 Hereafter, the block diagram of the RRA-modem functions, relevant to a single channel, is pointed out. REGENERATOR STM1 RRA BOARD ELET./OPT. INTERFACE MODEM BOARD HTL RRA RFCOH MODEM SW TX RX RT AUX. SERV. ATPC DCCR Aux.SERV. CH. 2 Mb/s SERVICE & ATPC WST SERVICE UNIT SYSTEM CONTROLLER F QB3 V batt. DC/DC CONVERTER ECT OS Figure 11. Regenerator block diagram WMSN Configuration When the Multiplex Section functionality is requested, an additional 1650 SM-C device has to be installed in the upper right position of the rack, just above the BB-Modem shelf. WMSN provide the mapping functionality (STM-1 frame creation), synchronisation management and tributary adddrop, network protection and VCs cross-connection. A detailed view of the multiplexer subrack is shown in Figure DB AAAA Ed05

25 Figure SM-C multiplexer front view This configuration, in particular, gives the possibility to manage up to 8 STM-1 channels line-side and to transmit them radio side with or without radio protection. In this way the obtained functionality is the one corresponding to a Line Terminal (LT) SM-C equipment consist of the following sub-system units: Compact ADM Access module Auxiliary and overhead Power supply The Compact ADM is built upon a matrix that can accept, through an access module providing the physical interface for the asynchronous or synchronous signals, a maximum of 63x2 Mb/s, 3x34 Mb/s, 3x45 Mb/s, 140 Mb/s or 155 Mb/s streams. Inside the ADM, a synchronisation unit provides the timing reference needed by all the components of the network element, with a max. daily drift of 0.37 ppm. A control sub-system realises the Synchronous System Management Function (SEMF), according with ITU-T G.783 recommendation. The sub-system operates with a double controlling system utilising an Equipment Controller (EC) for DCC networking and a Shelf Controller (SC) for alarm 3DB AAAA Ed.05 25

26 detection and reporting, performance monitoring and equipment protection switching. 26 3DB AAAA Ed05

27 A wide range of auxiliary service channels is offered according to SDH standards utilising SDH and POH bytes. These bytes are used for alignment word, parity check, network management operations, performance monitoring; some data and orderwire channels are available to the user. The unit utilises a power supply distributed architecture where the 48 V battery voltage is distributed to all the cards and here is DC/DC converted to the voltages necessary to each card. Two batteries can be used at the input, with automatic selection on the one with higher voltage. The distribution is protected against single converter failure. In Figure 13, the block diagram of the MST functionality, relevant to a single channel, is shown. WMSN 1650 SM- C REGENERATOR ASSEMBLY 63x2 Mbps 3x34 Mbps 3x45 Mbps 140 Mbps 155 Mbps ACCESS MODULE VC MATRIX STM-1 MODULE RRA BOARD ELECT. STM1 INT. RRA - HTL SW RFCOH MODEM BOARD MODEM ATPC RT SERVICE UNIT Aux. Serv. Ch. EOW & AUX SERV. & ATPC WST 2x2 Mbps SYSTEM CONTR. DC/DC CONV. V batt. F QB3 ECT OS Figure 13. MST- functional block diagram. 3DB AAAA Ed.05 27

28 6.3 Branching Tx and Rx filters and channel circulators are accommodated in horizontal layout respectively at the bottom and upper side of the transceiver subrack. They are connected to the antenna circulators sited over the top of the rack, by means of branching connections installed along one or two side walls of the rack, depending on the branching configuration that can be one polarisation per rack or double polarisation per rack type. According to the frequency band, the branching is realised utilising coaxial connections (4 and 5 GHz bands) or using waveguides (from 6 GHz to 13 GHz). The utilisation of narrow band RF branching filters allows to avoid the use of 3 db hybrids in all the channel plans. 6.4 Top Rack Unit (T.R.U.) At the rack top area a subrack, containing the breakers (up to 12) and the rack lamps is allocated. TRU main functions are the power battery protection and the power distribution to all the functional blocks present in the rack by means of pre-installed power supply cables. This solution contributes to an easy and fast installation and commissioning of the station. 28 3DB AAAA Ed05

29 7 Compact System Architecture The Alcatel 9600 LSY-C compact system architecture allows to install into a single subrack all the functionalities necessary to regenerator terminal configurations up to 1+1/2+0 : baseband, modem and RF parts. Next figure 14 shows the compact subrack equipped in 1+1 HST configuration. Figure 14. Compact subrack in 1+1 HST. The compact regenerator terminal reutilises all the active boards already used in the standard version, reducing the complexity of the whole 9600LSY system and supplying benefits on the spare part policy of the customer. Only two passive interface boards for WST service channels (in alternative 75 ohm or 120 ohm) have been developped as new board, toghether with the driver unit needed to the antenna Tx switch used in the Hot Standby 1+1 terminals. Next figures 15 and 16 show the allocation of the different units inside the compact subrack. 3DB AAAA Ed.05 29

30 Figure 15. Compact Regenerator Terminal in 1+1 configuration. The single board position can be easily identified in the next figure. In this case the 1+1 heterofrequency configuration is shown. Figure 16. Compact Regenerator for 1+1/2+0 configuration. The compact terminal can be operated on all the frequency bands foreseen for the standard multichannel version. 30 3DB AAAA Ed05

31 The 1+1/2+0 heterofrequency configurations are foreseen both with and without space diversity; moreover also the CCDP version has been implemented giving the performance to transmit two STM-1 channel on a single frequency channel by means of the use of the same canceller unit (XPIC) already developed for the normal version. Compact version allows to add to the heterofrequency and CCDP also the 1+1HST and 1+0 configurations, not available in the 9600LSY multichannel standard version. The 1+0 configuration has been designed taking into account the necessity of future expansions. So it is possible to install in advance, inside the subrack, a 1+0 branching ready to be expanded to 1+1/2+0. This possibility is foreseen for both copolar and alternate polar configurations. In this way the future expansion will be carried out only installing the additional active units and the branching filters, practically avoiding any traffic interruption. In the next figure, the drawing of the 9600LSY 1+0 compact configuration is reported, indicating the empty slots, covered by their cover, and the position of the single transceiver installed in the subrack. Figure 17. Compact Regenerator Terminal in 1+0 configuration. 3DB AAAA Ed.05 31

32 The terminal compact subrack has the following dimensions : 500 mm (w) x 475 mm (h) x 275 mm (d). 32 3DB AAAA Ed05

33 8 Technical Characteristics STANDARD MULTICHANNEL VERSION / 128 QAM Note: in case of channel plan with homopolar channel space 28 MHz, the threshold value is 0,5dB higher 3DB AAAA Ed.05 33

34 COMPACT VERSION / 128 QAM Note: in case of channel plan with homopolar channel space 28 MHz, the threshold value is 0,5dB higher 34 3DB AAAA Ed05

35 STANDARD MULTICHANNEL VERSION / 64 QAM RADIO SYSTEM 9640 LSY 9647 LSY 9667 LSY 9611 LSY RF FREQ. BAND (GHz) RF CHANNEL F F F F ARRANGEMENTS (ITU-R) RF CHANNEL SPACING (MHz) STM TRANSMISSION CAPACITY 1 x STM-1 1 x STM-1 1 x STM-1 1 x STM-1 (PER RF CHANNEL) or or or or 2 x STM-1 2 x STM-1 2 x STM-1 2 x STM-1 MODULATION DEMODULATION ADAPTIVE EQUALIZER SPECTRUM SHAPING CODING TYPE FREQUENCY REUSE 64 QAM COHERENT 19 TAPS RAISED COSINE MLC YES TRANSMITTED POWER (*) ATPC (Max.) (dbm) ATPC RANGE (db) AGC DINAMIC RANGE (db) 60 RECEIVER THRESHOLD BER =1x10-3 (**) (dbm) -76,7-76,7-76,5-76 RECEIVER THRESHOLD BER =1x10-6 (**) (dbm) -74,9-74,9-74,7-74,2 BRANCHING LOSSES T+R (db) 1+1 single polar (STM-1) 6,5 7,0 4 5,5 3+1 single polar (STM-1) 7,5 8,0 4,5 6 NET SYSTEM GAIN (Point C-C BER =1x10-3 (db) 1+1 single polar (STM-1) 102,2 101,7 104,5 100,5 3+1 single polar (STM-1) 101,2 100, SYSTEM STANDARD (ETSI) EN EN EN EN EN SWITCHING CONFIGURATION SWITCHING TYPE STATION CONFIGURATION POWER CONSUMPTION (W) 1+1/2+0 Regenerator Terminal 3+1/4+0 Regenerator Terminal 7+1/8+0 Regenerator Terminal N+0/N+1 HITLESS REGENERATOR TERM. - WIRELESS MULTISERVICE NODE < or = 180 < or = 350 < or = 670 (*) Tolerance: ± 0.5 db at ambient temperature; : ± 1.5 db at in temperature range 5 C to +55 C (**) Guaranteed values 3DB AAAA Ed.05 35

36 COMPACT VERSION / 64 QAM RADIO SYSTEM 9640 LSY 9647 LSY 9667 LSY 9611 LSY RF FREQ. BAND (GHz) RF CHANNEL F F F F ARRANGEMENTS (ITU-R) RF CHANNEL SPACING (MHz) STM TRANSMISSION CAPACITY 1 x STM-1 1 x STM-1 1 x STM-1 1 x STM-1 (PER RF CHANNEL) or or or or 2 x STM-1 2 x STM-1 2 x STM-1 2 x STM-1 MODULATION DEMODULATION ADAPTIVE EQUALIZER SPECTRUM SHAPING CODING TYPE 64 QAM COHERENT 19 TAPS RAISED COSINE FREQUENCY REUSE YES TRANSMITTED POWER (*) ATPC (Max.) (dbm) ATPC RANGE (db) AGC DINAMIC RANGE (db) 60 RECEIVER THRESHOLD BER =1x10-3 (**) (dbm) -76,7-76,7-76,5-76 RECEIVER THRESHOLD BER =1x10-6 (**) (dbm) -74,9-74,9-74,7-74,2 BRANCHING LOSSES T+R (db) 1+0 single polar (STM-1) 4,5 4,5 3,5 4,5 1+1/2+0 single polar (STM-1) 5 5, HST (1:10) (STM-1) 7,5 7,5 6,5 8 NET SYSTEM GAIN (Point C-C BER =1x10-3 (db) 1+0 single polar (STM-1) 104,2 104, ,5 1+1/2+0 single polar (STM-1) 103,7 103,7 104, HST (STM-1) 101,2 101, SYSTEM STANDARD (ETSI) EN EN EN EN EN MLC SWITCHING CONFIGURATION 1+0/1+1/2+0 SWITCHING TYPE HITLESS STATION CONFIGURATION POWER CONSUMPTION (W) 1+0 Regenerator Terminal (STM-1) < or = /2+0 Regenerator Terminal < or = 180 REGENERATOR TERM. - WIRELESS MULTISERVICE NODE (*) Tolerance: ± 0.5 db at ambient temperature; : ± 1.5 db at in temperature range 5 C to +55 C (**) Guaranteed values 36 3DB AAAA Ed05

37 STANDARD MULTICHANNEL & COMPACT VERSIONS Electrical Interface Mb/s (STM-1) ITU-T Rec. G Mb/s (PDH) ITU-T Rec. G x / 3 x Mb/s ITU-T Rec. G Mb/s ITU-T Rec. G.703 Optical Interface Mb/s (STM-1) ITU-T Rec.G.957 G.958 CHARACTERISTICS S 1.1 L 1.1 L 1.2 Input optical interface: Operating wavelenght range (nm) Minimum sensitivity (point R) (dbm) Minimum overload (point R) (dbm) Automatic Laser Shutdown procedure ITU-T G.958 ITU-T G.958 ITU-T G.958 Output optical interface: Max. launched power (point S) (dbm) Min. launched power (point S) (dbm) Note: the three type of optical interfaces above mentioned are available for Multiplex assembly while only the S 1.1 type is available for Regenerator assembly. Table 4. STM-1 Optical interfaces Auxiliary Channels 1 x 2 Mb/s (STM-1 ONLY) Service channel Omnibus voice channel (E1) DTMF 6 x 64 Kb/s (G.703 or V11) 1 x 9.6 Kb/s RS 232 3DB AAAA Ed.05 37

38 TMN channel (D1D3, D4 D12) 3 voice frequency party line (E1) 1 voice frequency (between adjacent sections) Network Management F. interface RS 232 C Q3 interface Ethernet AUI 10 Base2, 10 BaseT QECC interface D1 D3 / D4 D12 Rack dimensions (h x w x d) 2200 x 600 x 300 (mm) Environment EMI-EMC ETS Class B Safety IEC 950 and IEC 215 Temperature range: Standard version: -5 C to +55 C (with fans) Compact version: -5 C to +50 C (without fans) -5 C to +55 C (with fans) Power Supply 48 to 60 Vdc (± 20%) Note: all data subject to change without notice. 38 3DB AAAA Ed05

39 9 Glossary ADM Add Drop Multiplexer AP Alternate Polarisation APS Automatic Protection Switching ATM Asynchronous Transfer Mode ATPC Automatic Transmitted Power Control AUX AUXiliary BB Base Band BER Bit Error Rate CCDP Co-Channel Dual Polarisation CO-CH Co-Channel DCC Data Communication Channel DRRS Digital Radio Relay System DSI Digital Switching Information DTMF Dual Tone Multi Frequency ECT Equipment Craft Terminal EMI/EMC ElectroMagnetic Interf./ElectroMagnetic Compat. EOW Engineering Order Wire EPS Equipment Protection Switching ETSI European Telecommunication Standard Institute HET Hetero frequency (frequency diversity) IP Internet Protocol ITU International Telecommunication Union LT Line Terminal MCF Message Communication Function MSOH Multiplex Section OverHead MST Multiplex Section Termination NE Network Element OH OverHead OMSN Optinex MultiService Node OS Operation System PDH Plesiochronous Digital Hierarchy QAM Quadrature Amplitude Modulation RF Radio Frequency 3DB AAAA Ed.05 39

40 RFCOH RPS RRA RSOH RST RT SC SDH SNC-P SOH SSB STM SW TMN TRU VC WMSN XPD XPIC XPIF XPOL WST Radio Frame Complementary OverHead Radio Protection Switching Radio Regeneration Adaptation Regeneration Section OverHead Regenerator Section Termination Radio Transceiver System Controller Synchronous Digital Hierarchy Sub Network Connection Protection Section OverHead Single Side Band Synchronous Transport Module Software Telecommunication Management Network Top Rack Unit Virtual Container Wireless MultiService Node Cross Polar Discrimination Cross Polar Interference Canceller Cross Polar Improvement Factor Cross Polar channel Way Side Traffic 40 3DB AAAA Ed05

41 ALCATEL Via Trento Vimercate (MI) Italy Tel Fax Telex Alcatel reserves the right to modify the specifications in this document without prior warning, as a result of technical upgrades or new regulations. 3DB AAAA Ed.05 41