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Base station system 15 Nokia MetroSite EDGE Base Station 16 Nokia MetroSite EDGE Base Station features 19 Building capacity with the Nokia MetroSite EDGE Base Station 19 3.1.1 Four TRX BTS with flexible sectoring and dual band operation 19 3.1.2 Chaining of Nokia MetroSite EDGE base stations 20 3.1.3...
Transceiver unit 84 8.1.2 Interface unit 84 8.1.3 Transmission unit 85 8.1.4 Power supply unit 85 System requirements for Nokia MetroSite BTS Manager 85 Basic telecommunication features 86 International recommendations 87 8.4.1 Common standards 87 8.4.2 Electrical standards 87 8.4.3 Environment 90 8.4.4...
Power supply connector types Table 9. Cooling fans details Table 10. Transceiver unit alternatives Table 11. Nokia MetroSite EDGE Base Station unit alternatives and other delivery items Table 12. Common technical data Table 13. Specific technical data for the 5W GSM 900 TRX Table 14.
44 Figure 13. Nokia MetroSite EDGE Base Station block diagram 46 Figure 14. Power distribution in the Nokia MetroSite EDGE Base Station 48 Figure 15. Dimensions of the Nokia MetroSite EDGE Base Station 50 Figure 16. Arrangement of units 52 Figure 17.
About this document About this document This document describes the hardware, software, and functions of the Nokia MetroSite EDGE Base Station (BTS), including the 5W GSM TRX and 5W GSM/EDGE TRX variants. Use this document as a reference for the following information: •...
Base station system In general terms, base stations perform the radio function for the base station system. A base transceiver station (such as a Nokia MetroSite EDGE Base Station) is connected to a transmission node (such as a Nokia MetroHub Transmission Node) or directly to the base station controller (BSC) via the Abis interface and to the mobile stations (MS) via the Air interface (see Figure 1).
GSM/EDGE 900/1800, 800/1800 or 800/1900 BTS. Both omni and sectored configurations are supported. The small-sized Nokia MetroSite EDGE Base Station cabinet accommodates up to four transceiver units (TRXs). The Nokia MetroSite EDGE Base Station can be fitted with 5W GSM TRXs or 5W GSM/EDGE TRXs. Note The introduction of EDGE requires EDGE capable TRXs.
Figure 2. Nokia MetroSite - an ideal solution for dense, urban environment The Nokia MetroSite EDGE Base Station is the core element in the Nokia MetroSite Capacity Solution, which comprises complete sites equipped with BTSs, transmission equipment, and auxiliary equipment. However, the Nokia MetroSite EDGE Base Station can be integrated into other mobile network applications as well.
Product Description In order to ensure a high quality of calls, the Nokia MetroSite EDGE Base Station supports versatile features, such as frequency hopping. Due to its compact size, low weight, and high level of integration, the Nokia MetroSite EDGE Base Station is fast and easy to install, either indoors or outdoors with minimal preparations.
A detailed description of technical features supported by the Nokia MetroSite EDGE Base Station can be found in the Feature Descriptions document delivered in the Nokia MetroSite Base Station Software Release Binder. For a list of Nokia MetroSite EDGE Base Station properties, see also Chapter 8 in this document.
3.1.2 Chaining of Nokia MetroSite EDGE base stations Internal bus and Abis chaining are both possible with the Nokia MetroSite EDGE Base Station. For more information on Abis chaining, refer to Section 4.2. To further increase the capacity expansion possibilities, Nokia MetroSite EDGE base stations can be chained as one BCF object to include up to 12 TRXs.
The RF performance of the Nokia MetroSite EDGE Base Station is suitable for microcellular, building infill and roadside coverage applications. The maximum RF power of the Nokia MetroSite EDGE Base Station transmitter is 5 W at the antenna connector. The maximum RF power of the Nokia MetroSite EDGE Base Station in EDGE modulation mode is 3.2 W.
BSC. 3.2.2 Frequency hopping The Nokia MetroSite EDGE Base Station supports synthesised (RF) frequency hopping when there are at least two TRXs in the same sector. The most significant property of frequency hopping is that it enables averaging of the interference to RF signal between network users.
Nokia MetroSite EDGE Base Station features When the Nokia MetroSite EDGE Base Station itself is installed inside a building, the antennas can be located outdoors. The size of antenna feeders, 1/4” and 3/8”, support the flexibility of installation. The TRX test includes an antenna cable detection feature which, in most of the cases, verifies whether the cable connection between the TRX and the antenna is free of faults.
Operation. Delivery and installation procedure The Nokia MetroSite EDGE Base Station is delivered to the site with the ordered plug-in units pre-installed. Shield units are installed in those unit slots that are not occupied by functional units. The purpose of shield units is to provide protection for the backplane connectors, ensure optimal air flow inside the cabinet, and provide EMC and weather shielding for the BTS.
Usually, removing only the TRXs makes the Nokia MetroSite EDGE Base Station light enough to handle. The Nokia MetroSite EDGE Base Station is then installed on a wall or a pole. In wall mountings, the packing cardboard can be used as a template for drilling the anchor screw holes to the wall.
The LAPD links must be created at the BSC • The PCM port at the BSC must be set to active The commissioning procedure performed on site with the Nokia MetroSite BTS Manager includes the following steps: • Transmission configuration •...
BTS service level. The alarms are addressed to the unit level, which helps the maintenance engineers locate the faulty unit. In the case of a mains power failure, the Nokia MetroSite EDGE Base Station provides sufficient backup time for an alarm to be sent to the BSC.
If additional battery backup is needed, the Nokia MetroSite Battery Backup unit can be used for this purpose. The Nokia MetroSite Battery Backup provides one hour backup time for the Nokia MetroSite EDGE Base Station operating at 400 W. The Nokia MetroSite Battery Backup is an external unit with the same appearance and mounting options as the Nokia MetroSite Base Station itself.
Nokia MetroSite EDGE Base Station features The BTS has a cooling fan and built-in heaters to provide a smooth temperature controlling facility. The BTS software controls the heating and cooling to provide operation conditions which are as stable as possible. Heating and cooling are adjusted gradually to ensure low temperature gradients and noise levels.
Building capacity with the Nokia MetroSite EDGE Base Station The Nokia MetroSite EDGE Base Station can be used for building capacity in areas of heavy telecommunication traffic, such as for building infill, street corners, sports arenas, shopping centres, and underground stations. It can also be used for coverage of gaps in networks, such as for unfriendly terrain or roadside coverage.
Figure 6. Microcells built with the Nokia MetroSite EDGE Base Station The Nokia MetroSite EDGE Base Station can be sectored freely. A sector consists of one broadcast control channel (BCCH) TRX and, often, one to three traffic channel (TCH) TRXs. The maximum number of TRXs in one sector is four.
GSM/EDGE 900 and GSM/EDGE 1800 antennas towards the same direction. The Nokia MetroSite EDGE Base Station can be used to build fill-in coverage in areas that are difficult to reach with conventional base stations. In these cases, it is recommended that high-gain antennas are used.
EDGE Base Station and the BSC through the Abis interface. The transmission media can be either radio link (RRI) or wireline (E1/T1). The FC RRI and FXC RRI transmission units are used with Nokia MetroHopper radios and/or Nokia FlexiHopper microwave radios. The FC E1/T1, FXC E1 and FXC E1/T1 transmission units are used for wireline transmission.
Furthermore, the Nokia MetroSite EDGE Base Station can be directly connected to the BSC. The Nokia MetroSite EDGE Base Station supports 16 Kbit/s, 32 Kbit/s and 64 Kbit/s Abis TRX signalling. The O&M signalling speed alternatives are 16 Kbit/s, 32 Kbit/s and 64 Kbit/s. To optimise the use of transmission capacity, combined O&M and TRX signalling is also supported at all these speeds.
SW pre-installed in order to support rapid deployment of the BTS. The Nokia MetroSite EDGE Base Station SW is to a large extent based on the SW for the field-proven Nokia Talk family of base stations and is enhanced with new and improved features.
BTS sectoring and TRX numbering can be read from the Nokia MetroSite BTS Manager’s display. During normal operation the Nokia MetroSite EDGE Base Station is managed remotely from the OSS. Nokia MetroSite BTS Manager provides a graphical user interface, running in Windows NT, Windows 95, and Windows 98 environments.
Nokia MetroSite BTS Manager is part of the Nokia SiteWizard SW package. BTS software updates When the Nokia MetroSite EDGE Base Station software is updated, it can be loaded either locally with the Nokia MetroSite BTS Manager, or remotely from the BSC or the OSS (via the BSC).
BTS software. The Nokia MetroSite BTS Manager is delivered on CD-ROM with Nokia SiteWizard. For more information on Nokia MetroSite EDGE Base Station SW, refer to Nokia MetroSite EDGE Base Station software release documentation.
Abis unit TRX 1 Fan unit Figure 13. Nokia MetroSite EDGE Base Station block diagram BTS internal buses The BTS internal signalling and the signalling between the BTS and the adjacent external equipment is handled by the following buses: •...
Physically, the buses are located on the BTS backplane. Base control functions The Nokia MetroSite EDGE Base Station does not have a separate plug-in unit for base control functions (BCF) because one of the TRXs is configured as the master TRX of the BTS. Currently, the master TRX is always located in TRX slot 1 (the lower left TRX slot, next to the transmission unit and interface unit slots).
Power distribution in the Nokia MetroSite EDGE Base Station Cabinet (HVMC) and cover (HVCU, WCUA) Similarly to all the other properties of the Nokia MetroSite EDGE Base Station, its construction has been optimised for microcellular, building infill and roadside coverage solutions. The chassis and the units are easy to install and move, and the compact structure provides new installation possibilities.
General function, construction and units An optional WCUA type cover is available. This cover is made from high impact polycarbonate and when fitted, the Nokia MetroSite EDGE BTS is designed to meet the requirements for National Equipment-Building Standards (NEBS). The dimensions of the Nokia MetroSite EDGE Base Station are presented in Figure 15.
In the following sections, the Nokia abbreviations for different units are given in the parentheses after the sections’ titles. Note The LED conditions of the units are presented in Nokia MetroSite EDGE Base Station: Maintenance. Figure 16 shows the arrangement of the units.
Figure 17. Transceiver unit The transceiver unit of Nokia MetroSite EDGE Base Station consists of digital and analogue parts and mechanics. The digital functions are in the baseband module whereas the analogue part consists of an RF module and integrated duplex filter.
6.5 M REF DN98916275 Figure 18. Block diagram of a Nokia MetroSite TRX One of the TRXs is configured as the master TRX, which manages all the O&M functions of the BTS. In order to optimise the transmitter output power, the antennas are directly connected to the TRXs.
SMA (female) Interface unit (VIFA) The external interfaces of the Nokia MetroSite EDGE Base Station are located on the interface unit. The Local Management Port (LMP) provides the connection to the MetroSite BTS Manager PC. The Nokia Q1 interface is a connection for supervising the Nokia Q1-bus compatible external equipment, such as DMR radios.
External alarms and controls Extension interface Nokia Q1 interface Figure 21. Interface unit of the Nokia MetroSite EDGE Base Station 6.4.1 External interfaces The interfaces and their connector types are described in this section. Local Management Port (LMP) The LMP provides the connection to the MetroSite BTS Manager PC. The connector type for the LMP is BQ, RS-232.
Ground Nokia Q1 interface The Nokia Q1 interface provides a connection for supervising the Nokia Q1-bus compatible external equipment, such as DMR radios. The Q1 interface connector type is TQ. Figure 23 and Table 4 present the pin order and configuration for the Q1 connector.
Product Description Extension interface This 50-pin mini D-type connector is used for BTS chaining and for connecting to the Nokia MetroHub Transmission Node. External alarms and controls (EAC) The external alarms and controls connector provides the interface for 10 customer definable external alarm (EA) inputs and 4 control outputs (ECO).
All transmission units can be managed locally with the Nokia SiteWizard software. 6.5.1 Unit alternatives for radio link transmission The following radio link transmission units are available for the Nokia MetroSite EDGE Base Station: FXC RRI (VXRB) • Maximum 16 x 2 Mbit/s capacity •...
FXC RRI Figure 25. Radio link transmission unit alternatives 6.5.2 Unit alternatives for wireline transmission The following wireline transmission units are available for the Nokia MetroSite EDGE Base Station: FC E1/T1 (VXEA) The FC E1/T1 transmission unit: • Provides one Abis line interface to the 2 Mbit/s (E1) or 1.5 Mbit/s (T1) transmission line •...
RX connectors are connected to each other with a grounding bridge. By removing the grounding bridge, the RX connector’s outer conductor can be changed from direct grounding to capacitive grounding. For more information on the FXC E1 transmission unit, refer to Nokia MetroHub Product Description. FXC E1/T1 (VXTB):...
The purpose of the power supply unit is to convert the incoming AC or DC supply voltages into the appropriate DC output voltages. The power is distributed to the units of the Nokia MetroSite EDGE Base Station and to radio outdoor units (if used) via the backplane. DC power supplies are reverse polarity protected.
Unit alternatives and other delivery items Unit alternatives and other delivery items This chapter details the unit alternatives for Nokia MetroSite EDGE Base Stations. Table 10. Transceiver unit alternatives Input power Frequency band Unit type Notes GSM 900 HVTGA Standard ﬁlter...
Technical specifications Technical specifications The purpose of this chapter is to provide all the necessary technical data for the Nokia MetroSite EDGE Base Station. Table 12. Common technical data Property Value Note Height 871 mm (34.3 in) 954 mm (37.56 in)
TRXs in one sector Isolation requirement for Minimum 25 dB antenna or external combiner equipment Table 20. HW interfaces of Nokia MetroSite EDGE Base Station Interface Number Connector type/note Antenna connectors 1 to 4 N-type (female), one for each TRX...
Technical specifications Table 20. HW interfaces of Nokia MetroSite EDGE Base Station (Continued) Interface Number Connector type/note Frame clock MCX (female) Q1 interface Local management port (LMP) BQ, RS-232 Table 21. Transmission interfaces of Nokia MetroSite EDGE Base Station Interface...
Accessories CD-ROM drive Windows compatible mouse or pointing device Windows compatible printer (optional) Cable (PC - BTS) Basic telecommunication features The Nokia MetroSite EDGE Base Station supports the following basic telecommunication features: • DRX, discontinuous reception • DTX, discontinuous transmission •...
This section lists the recommendations referred to in the designing of the Nokia MetroSite EDGE Base Station. 8.4.1 Common standards Table 28 lists the common standards referred to in the designing of the Nokia MetroSite EDGE Base Station. Table 28. Common standards...
Protection GR-487-CORE Corrosion Resistance - Temperature Cycling/High Humidity Note The Nokia MetroSite EDGE BTS is designed to meet GR-63-CORE (NEBS) and GR-487-CORE only when fitted with the WCUA type cover (high impact polycarbonate). 8.4.5 Base station interface equipment - related recommendations and...
BTS interfaces network quality common Nokia MetroSite BTS Manager electrical Nokia MetroSite Capacity Solution electrical safety Nokia MetroSite EDGE Base Station Nokia MetroSite EDGE Base Station software environmental Nokia SiteWizard input voltage non -transparent data mechanical star connection system requirements...